Daan gene successfully developed A-type H1N1 test kit

May 8th, Daan Gene [11.30 0.62%] and its subsidiary subsidiary, Guangzhou Huashengda Rescue Biotechnology Co., Ltd. jointly developed a new generation of influenza A (H1N1) virus detection kit (real-time RT-PCR method and general-purpose influenza A virus nucleic acid detection kit (real-time RT-PCR method) used in Hong Kong University Laboratory of Microbiology (WHO (World Health Organization) Network Laboratory) The first case of a newly diagnosed influenza A (H1N1) case was successfully tested for clinical samples and virus-isolated culture samples. The laboratory verification results show that the above two kits have good specificity and sensitivity.

Daan Gene announced today that the above two kits are based on the Real-time RT-PCR method devised in Annex 3 of the “Guidelines for Prevention and Control of Swine Influenza Infection in Humans (Trial)” promulgated by the Ministry of Health. Gene fluorescent probe developed.

At present, only two dozen kits are used for scientific research and are used in domestic public health and disease prevention and control. In view of the fact that clinically used in vitro diagnostic reagents must pass the verification, assessment, and approval of registration by the State Food and Drug Administration, there is a great deal of uncertainty in the wide application of the clinical field. Whether the successful development of the above two kits has a beneficial effect on the performance of the company, there are also major uncertainties. At present, other domestic and foreign companies and scientific research institutions have already developed or may have successfully developed similar testing products. The company’s products are not the only ones. of.

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How to relieve insomnia symptoms in the summer insomnia season

In summer, many people suffer from insomnia. Many people have “suddenly unable to sleep” syndrome. It is a big reason why they cannot sleep in the summer. What causes this, besides this reason, is that it is easy to insomnia in summer?

In summer, although people are not promoted to snooze, it is also necessary to “get good” sleep so as not to lay a hidden danger for sleeping disorders in autumn and winter. Clinically, many patients suffer from insomnia in the fall and winter, which is related to improper summer sleep. If you sleep too late in the summer, normal sleep rhythm is interrupted, coupled with bad sleep habits such as cold, autumn and winter will occur insomnia.

Some people with insomnia in summer think that summer is low in air pressure, heavy in humidity, and insomnia is normal. In fact, summer insomnia is more harmful to the body than other seasons. Because people sweat more during the day, if they suffer from insomnia at night, they will cause symptoms of myocardial ischemia and increased blood pressure, greatly increasing the chance of sudden death. In addition, in the sleep state, the human heart pressure will be reduced, and insomniac can not let the heart get the proper function recovery time, it will increase the burden on the heart, can easily lead to heart disease.

According to Chinese medicine, why do people suffer from insomnia? In simple terms, there are three: First, the heart and kidney do not pay, the second is blood deficiency, and the third is stomach disharmony.

1, heart and kidney do not pay

If a person's heart is on fire and kidney water descends, the heart and kidneys are separated, causing people to fall asleep at night and get tired during the day. Their legs are heavy. This insomnia is more difficult to treat.

In the past, a few doses of Suanzaoren soup, or warm bile soup, can cure it, but now these drugs have no obvious effect. Because people's life is much more complicated than in ancient times, many people's insomnia is related to long-term stay up late.

Every night from 11pm to 1am, it is time for gallbladder to sleep. If you always go to bed later than this time, you will slowly appear to be incapable of communicating your heart and kidneys, resulting in insomnia.

2, lack of blood

Inadequate blood can also cause insomnia. There is a saying in Chinese medicine, called the middle focus is the gas, Zhong Jiao is our spleen and stomach. The human body digests food through the stomach and converts the essence of the food into blood. Blood is an energy that represents a kind of kinetic energy and loses its way to the human body.

We often mention the problem of blood supplements. Eating well is the right way. Eating a lot of so-called tonic supplements may not be of much use. Stomach main blood, stomach deficiency will cause blood deficiency, in order to supplement the blood, we must maintain a good stomach. Insufficient blood, if not effectively lost in the brain, the brain will cause insomnia due to ischemia.

3, the stomach is uneasy and restless

If you eat too much at night, you can also cause insomnia. If you eat too much at night, the air will be blocked by medium coke, causing insomnia.

In ancient times, the emphasis on health care is not to eat. It is to eat only two meals a day. At nine o'clock and ten o'clock in the morning, every meal is served at four or five o'clock in the afternoon and no longer eats at night. The rules of life are also sunrise and sunset, so people rarely sleep.

Now we should also have a principle for eating dinner.

What can you do with insomnia in the summer?

First of all, to find out the cause of insomnia, if it is only in summer, insomnia, and most of the temperature has a direct relationship with the high summer temperatures, unbearable heat, naturally will not sleep well. At this time, the best way to solve insomnia is to create a better environment for you to sleep. If there is air conditioning, then it is best. If there is no air conditioning, it can be blown with a fan. Here, the temperature should not be adjusted too low to avoid causing a cold.

Excessive sweating, the electrolytes in the body lose their balance, and they can't sleep. Therefore, it is usually necessary to add more water. It is appropriate to supplement some of the salt water, which is more conducive to balance the body's water and electrolyte. In addition, you should choose your own pajamas with good water absorption. Personally feel that summer sleep or should wear pajamas, if you do not wear pajamas, if the night is cold, it is easy to cause a cold.

Usually pay attention to light diet, the summer temperature change, people's appetite itself will be affected, this time if you eat too greasy, then it will make the entire people seem dizzy during the day and always want to sleep and to Did not want to sleep at night. As a result, insomnia can be a problem. If there are problems with insomnia in the daytime, then try not to make up for it during the day, because during the day it is common to fill up and sleep is sufficient. At night, it may not sleep, and Chinese medicine believes that it is best to sleep at night. Timing, so if you "reverse black and white," then you won't really get a real sleep.

Don't give yourself too many excuses for not sleeping well. What programs haven't been solved today? The World Cup is very nice, or where the nightlife is very rich. These should not be used as an excuse to affect your normal sleep. In principle, you should sleep. The point is to go to bed so that it will not cause insomnia.

In fact, there are many reasons for insomnia in summer. In addition to the changes in temperature, many people are also prone to gastrointestinal problems during the summer. This can also cause insomnia. Therefore, it is usually necessary to pay more attention to these diseases. The problem of insomnia, if it is, must be targeted. For patients with insomnia problems that are not very serious, you can usually take a hot bath, drink a cup of milk, and perform foot massage before going to sleep. At the same time, you must not move your work, mobile phones, computers, etc. to your bed. Create a good sleep habit yourself, and then you can play a role in promoting healthy sleep.

If the problem of insomnia cannot be resolved, it is recommended not to use hypnotics directly because hypnotics also have side effects and may have a bad influence on the health of the human body. Therefore, it is recommended that you can go to the hospital to check what kind of reasons are causing the problem. Insomnia problems, if necessary, psychological intervention can also be.

No matter summer or other time. Having a healthy and scientific sleep can promote better health. Therefore, we must develop good sleep habits daily.

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China independently developed the first fluoroquinolone antibacterial drug

International Online News (Reporter Wei Ning): The Chinese Academy of Sciences announced on the 31st that it has successfully developed the innovative drug "Ametoxacin Hydrochloride." This is China's first fluoroquinolone antibiotic with independent intellectual property rights.

Fluoroquinolones are currently one of the three major types of antibacterial drugs in China, with a market size of approximately RMB 10 billion. Prior to this, China's use of such drugs could only rely on imports. The scientific and technical personnel of the Shanghai Institute of Materia Medica, Chinese Academy of Sciences, after 16 years of hard work, finally completed the research and development and clinical trials of the new drug “Antoxacin Hydrochloride”. At present, this drug has been awarded a new drug certificate issued by China's State Food and Drug Administration and will be available soon.

Studies have shown that "Ametoxacin Hydrochloride" has been used to treat bacterial infections in the three major systems of the respiratory tract, urinary tract, and soft tissues of the skin. The efficacy is definite and there are few adverse reactions.

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Welcoem to 120th Guangzhou Canton Fair

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Recommended 7 Ziyin kidney and impotence diet

Some people often take a variety of proprietary Chinese medicines to treat kidney deficiency, but proprietary Chinese medicines will have detrimental effects on their medicinal properties, greatly reducing their effectiveness. In fact, kidney deficiency can be improved through diet therapy, not only nutritious but also safe and without side effects. Let's take a look at what kind of kidney-based medicinal diet it has.

1, shrimp soup

Raw materials: 200 grams of loach, 30 grams of shrimp, ginger, salt, monosodium glutamate, starch and the appropriate amount.

Method: Wash the loach with warm water, remove the internal organs; wash the shrimp; ginger, shred or small pieces. The loach, shrimp into the casserole, Wuhuo soup, to be cooked, add ginger, salt, monosodium glutamate seasoning hook starch Serve.

Efficacy: Warm Yang kidney. Due to the weak kidney qi and insufficient kidney yang due to weakness, it is better to eat this soup.

2, spiced dog meat

Raw materials: 250 grams of dog meat, 6 grams of cumin, cinnamon and clove, and the appropriate amount of onion, ginger, garlic, soy sauce, cooking wine, and sugar.

Method: Wash the dog meat, put it in the pot, add water to boil. Put cumin, cinnamon, cloves, and onions, ginger, garlic, soy sauce, cooking wine, and sugar. Cook the dog until it's crumbly, remove the slices, and put it back into the soup.

Efficacy: In addition to the role of dog meat in Buzhongyiqi, but also Wenshen Yang, it is insufficient kidney yang, waist and knee weakness or cold pain, the food is the most appropriate. This medicated diet is used for deficiency of kidney yang, weak waist and knees, not warm limbs, and impotence embolism.

3, Pork kidney yam soup

Raw materials: 2 pig kidneys, 100 grams of Chinese yam, 50 grams of wolfberry fruit, 50 grams of Adenophora, 50 grams of Coix seed, a little salt, ginger, onion.

System of law: pig kidney, wash, cut, remove the fascia, put cold water soak for 2 hours, change the water every half an hour, and finally use hot water to dip to smell, cut into small Ding spare; yam Wash, peel, dice, put together with other medicines into pot, add pig kidney and appropriate amount of water, and add wine, salt, ginger, onion, pepper, etc., first boil it with Wuhuo, then stew with mild fire until crisp Can be eaten.

Efficacy: Kidney and spleen, blood and beauty. Kidney and kidney, yam and spleen, wolfberry fruit nourishing liver blood, Adenophora and stomach yin, Coixenoides wet spot cosmetic. It is suitable for chloasma caused by deficiency of spleen and kidney.

4, melon scallop stew pheasant

Raw materials: 500 grams of pheasant, 500 grams of wax gourd, 80 grams of dried scallops, monosodium glutamate, salt, dried tangerine peel, and ginger.

Method:

(1) The frogs shall go to the head, peel off the skin, and remove the viscera. After washing, chop it into pieces and place it in the pot. Add fresh water.

(2) Wash the scallops into a small bowl, add a little boiling water, and steam for 10 minutes on the cage. After cooling, shred and pour into the big stew pot of the Morita chicken by hand and put it into the steamed ginger for 1 hour.

(3) melon peeled, dig hoe, Xiu Cheng shape, under the boiling water pot and roll out after a moment, into the frog chicken stew, add salt, monosodium glutamate, and then steamed on the cage for half an hour, remove the Serve.

Efficacy: Tianji with antipyretic toxin, benefit water and gas, eliminating edema effect; scallops flat, sweet and salty, can kidney nourishing yin, so kidney yin deficiency should eat it regularly. This diet is suitable for kidney edema, or physical edema and bloating and other diseases.

5, Eucommia Wenshen Decoction

Ingredients: 20 grams of eucommia, a pair of pigs, 50 grams of walnuts. Salt, MSG amount.

Method: Add Eucommia, Pork Loin, and Walnut with water, boiled and seasoned with salt and MSG. Eat pork loin and walnuts and soup.

Efficacy: Kidney deficiency. Kidney deficiency caused by kidney ache, feet and knees weak, children with kidney paralysis caused by numbness of the lower limbs and women caused by habitual abortion, the most appropriate.

6, black sesame date porridge

Ingredients: 500 grams of glutinous rice; amount of black sesame seeds, red dates, sugar amount.

Method: Saute with black sesame seeds, crushed into powder, and heat the pot. Heat the glutinous rice, black sesame powder, and red dates into the pan. After the fire is baked, use a small fire to boil the porridge. Sugar seasoning can be.

Efficacy: sesame Gan Ping, there is liver and kidney, Run five internal organs. This herbal meal is fragrant, sweet and delicious, with the therapeutic effects of liver, kidney and UFA.

7, fried prawn nourishing yin and kidney

Raw materials: 500 grams of net prawns, 30 grams of wolfberry fruit, 50 grams of garlic, 50 milliliters of chicken soup, 16 grams of salt, 15 milliliters of cooking wine, onion, ginger, garlic, garlic sprouts, monosodium glutamate, sesame oil, and rice vinegar.

Method:

(1) Half of the dumplings are decocted with boiling water, 15 ml of juice is concentrated, and the other half is placed in a small bowl. The upper drawer is steamed and ready for use.

(2) Wash the prawn and evenly cut into 3 sections. Use 1 g of salt, marinate 5 ml of cooking wine, and then thicken the thick wet starch. Onion, ginger cut into silk, garlic cut into pieces. In the onion, ginger, garlic, and garlic segments of the anti-bone bowl, add chicken broth, 15 g of salt, 10 ml of soy sauce, 10 ml of cooking wine, wolfberry fruit juice and MSG to juice.

(3) Put the vegetable oil into the pot till it matures. Put the shrimp segment gradually into the oil, fry it until it is crispy, float golden brown, and pour it into the colander to filter it to the oil. The original pan leaving the base oil is poured into a good portion of the shrimp, and the person cooks the good juice and the cooked dumplings. After turning over several times, it is poured into the sesame oil and then it is drenched in the rice vinegar.

Efficacy: Ziyin Bushen. Applicable to the deficiency of kidney due to weakness, blood dizziness, palpitations, fatigue, kidney impotence, back pain embolism.

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Slimming lettuce reduces fat and inhibits viruses containing dietary fiber and vitamin C

Jellyfish Net June 4th From the week of May 28 to June 3, Yantai City Commercial Comprehensive Law Enforcement Detachment in the urban world market, bonus market, cultural road market, happy wholesale market, Hongda market, nine Tianshui Wholesale Market, Sanhuan Market, Jiajiayue Distribution Center, RT-Mart Supermarket, Aeon Supermarket, Yantai Market, Chujia Market, Zhishui Market, Yipin Fresh Vegetable Supermarket, Zhenhua Distribution, Fushan Fuhui, CR Vanguard A total of 3788 vegetable samples were tested at vegetable testing points set up by Fuzu Food, etc., and 3,742 qualified samples. 46 samples failed to pass the inspection.

One week vegetable quality inspection report

After testing, the eligible rates of the major vegetable varieties consumed by the public daily are: cabbage, lettuce, beans, cowpea, cucumber is 100%, cabbage, garland chrysanthemum, head vegetable, spinach, rape, celery, and leek are slightly lower.

The main vegetable food safety index was: cabbage, lettuce, beans, kidney beans, cucumbers, onions, radishes, peppers, potatoes, cabbage, garland chrysanthemum, spinach, head vegetables, rape, celery is high; leeks are medium. Recommended vegetable varieties with higher consumption index are: cabbage, lettuce, beans, kidney beans, cucumbers, onions, peppers, radishes, potatoes, tomatoes, and eggplants. The types of vegetables that are suitable for eating this week are: cucumber, cabbage, lettuce, pepper, radish, onion, and tomatoes.

This week, the quality of vegetables: vegetables such as celery, Chinese cabbage, head vegetables, and rapeseed; the quality of vegetables dropped: spinach, garland chrysanthemum, and leeks; and the quality of vegetables was flat: cucumber, cowpea, cabbage, beans, and lettuce. Vegetables are expected to increase in quality next week: garland chrysanthemum and rapeseed.

Lettuce really good, both reduce fat and inhibit the virus

Let's introduce Lettuce this week! “The lettuce contains dietary fiber and vitamin C, which has the effect of eliminating excess fat, so it is also called slimming lettuce.” According to the vegetable experts, because of the lettuce ingredients contained in the stems and leaves, the Weiwei Bitter, with analgesic hypnosis, lower cholesterol, adjuvant treatment of neurasthenia and other effects; and lettuce contains mannitol and other active ingredients, diuresis and promote blood circulation; lettuce contains an "interferon inducer" can be Stimulates normal human cells to produce interferon, thereby producing an "antiviral protein" that inhibits the virus.

When picking lettuce, in addition to looking at whether the color of the leaves is green or blue, note that the stems are white enough for the stems. The good lettuce is called "glass lettuce" in some places. Although it does not look really exaggerated and translucent, it also shows its texture. The better the lettuce leaves are, the more brittle the leaves can feel with this handkerchief. And the blades are not very thick and the foliage has an attractive gloss. In places where the foliage is broken or wrinkled, fresh lettuce may become rusted by air oxidation.

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UC Black Technology: Lasers make electronic devices no longer dependent on semiconductor materials

According to foreign media reports, the University of California, San Diego, scientists have developed a new type of microelectronic devices, the future of PC processors made of semiconductor materials may be replaced.

This new technology is still in its early stages of development, but it involves some interesting research and considerable science fiction concepts. University of California, San Diego engineers developed a light-controlled microelectronic device that contains metamaterials composed of gold nanotubes. By laser irradiation, the super-surface energy to produce high-intensity electric field.

This new type of microelectronic device, which does not use semiconductor materials, will someday solve one of the problems faced by modern microprocessors. The problem with processors that operate electronically depends on the fact that the electrons collide with atoms constantly, many of which may not be able to migrate to their destination - many electrons are lost during the processor's operation.

University of California, San Diego, new electronic equipment schematic

This new microelectronic device attempts to solve this problem by "mimicking" the old-fashioned vacuum tube - of course on a microscale. Mushroom-shaped nanotubes in the device form Metasurfaces on silicon wafers, both separated by a layer of silicon dioxide. When a low DC voltage is applied and a low-energy infrared laser is applied, this structure produces a high-intensity electric field that allows electrons to "migrate" freely.

This experimental technology enables more electrons to be controlled at a time with less interference, which means that processors built using this technology will outperform current semiconductor-based processors. This technology, which is still used in smartphones for quite some time, is an interesting concept and approach to solving the almost no-questions of modern electronic devices.

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Centrifugal pump principle

Centrifugal pump cited is based on the principle of centrifugal force design, high-speed rotation of the impeller blades to rotate the water, the water thrown, so as to achieve the purpose of delivery. There are many types of centrifugal pumps, from the use can be divided into civilian and industrial pumps; from the transmission medium can be divided into clear water pumps, impurity pumps, corrosion pumps and so on. Centrifugal is actually the manifestation of the object's inertia, such as water droplets on an umbrella. When the umbrella slowly rotates, the water droplets will follow the umbrella. This is because the friction between the umbrella and the water droplets serves as a centripetal force to the water droplets. But if the umbrella rotates faster, the friction is not enough to make the water drop in circular motion, then the water drop will move away from the umbrella toward the outer edge, just as a rope pulls the stone to make a circular motion. If it is too fast, the rope will Disconnected, the rocks will fly out. This is called Centrifugal. Centrifugal pump main working principle (1) the impeller is driven by the pump shaft rotation, located between the blade fluid doing work, the fluid by the centrifugal force, thrown from the center of the impeller to the periphery. When the fluid reaches the periphery of the impeller, the flow rate is very high. (2) The pump housing collects liquid that is thrown from the vanes and flows in the direction of the gradual enlargement of the volute-shaped passage in the housing to convert the kinetic energy of the fluid into static pressure energy and reduce the energy loss. Therefore, the role of the pump casing is not only to pool the liquid, it is more an energy conversion device. (3) Principle of Liquid Absorption: The high-speed rotation of the impeller forces the liquid in the center of the impeller to be thrown away at a high speed, so that a low pressure is formed in the center of the impeller. Therefore, the liquid in the lower tank is continuously sucked up. Barrage phenomenon: If the centrifugal pump in the shell before the start is full of gas, then start the impeller center gas is thrown there can not be formed in a large enough vacuum, so tank liquid can not be sucked up. This phenomenon is called gas binding. In order to prevent the phenomenon of gas binding, centrifugal pump should be filled with foreign liquid to fill the space before pump starts. This step is called filling pump. In order to prevent the liquid poured into the pump casing due to gravity flow into the lower slot, the pump inlet pipe at the inlet with check valve (bottom valve); if the pump position below the tank surface, then start without irrigation Pump. (4) The outer circumference of the impeller to install the guide wheel, so that the pump liquid energy conversion efficiency. The guide wheel is a fixed, bladed ring located on the periphery of the impeller. The bending direction of the blade is opposite to the bending direction of the impeller blade, the bending angle of the blade matches the direction that the liquid flows out from the impeller, guiding the liquid to change direction smoothly in the passage of the pump casing so as to minimize the energy loss and convert the dynamic pressure energy into High static pressure energy. (5) balance hole on the rear cover to eliminate axial thrust. The pressure of the liquid leaving the periphery of the impeller is already high and some of the liquid will seep to the rear of the impeller rear cover and the liquid inlet at the front of the impeller is under pressure and thus produces an axial thrust pushing the impeller to the pump inlet side. This easily causes the impeller and the pump housing contact wear, severe vibration will occur. The balance hole leaks part of the high-pressure liquid to the low pressure area to reduce the pressure difference around the impeller. But this will also reduce the pump efficiency. (6) shaft seal device to ensure normal and efficient centrifugal pump. Pipeline centrifugal pump in the work of the pump shaft rotation and the shell does not move, during which if the ring gap is not sealed or seal is not good, the outside air will infiltrate the low pressure area of ​​the impeller center, so that the pump flow, efficiency decreased. Serious when the flow is zero - gas tied. In general, a mechanical seal or a packing seal can be used to achieve a seal between the shaft and the shell.

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Shanghai Microsystems GaAs arsenic and bismuth quantum well laser research progress

Recent progress has been made in the research of gallium arsenide and bismuth (GaAsBi) quantum well lasers at the Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences. Researcher Wang Shu-min led a team of researchers that used molecular beam epitaxy to grow gallium arsenide-bismuth quantum well materials and successfully fabricated an electrically pumped gallium arsenic arsenide room-temperature (300 K) quantum well laser with the longest emission wavelength (1.142 microns) Before breaking the world record of 1.06 microns, the maximum output power of pulsed lasers reached 127 mW and was first reported at 273 K for continuous lasing. Related Research Papers 1.142 μm GaAsBi / GaAs Quantum Well Lasers Grown by Molecular Beam Epitaxy was published on ACS Photonics (DOI: 10.1021 / acsphotonics.7b00240) on June 5th.

Diluted bismuth semiconductor material has a series of excellent characteristics different from the traditional three five family material, is a promising new photoelectric device materials, is also one of the hot areas in the current international research. Gallium arsenic is one of the most promising new materials for uncooled lasers in optical communication systems due to its large band gap shrinkage effect, spin orbit splitting energy and low temperature sensitivity. However, in order to effectively coagulate the bismuth component, gallium arsenide bismuth material growth requires a lower temperature, which easily lead to an increase in defect density and thus affect the material's luminescent properties, laser material growth has great challenges. Shanghai Microsystems Wu Xiaoyan, Pan Wenwu, who based on molecular beam epitaxy technology to optimize the growth of high-quality gallium arsenide and bismuth quantum well material, the successful preparation of high-performance gallium arsenide bismuth quantum well lasers, the emission wavelength extends to 1.142 microns, while its The characteristic temperature and wavelength temperature coefficient are superior to the current commercial InP-based lasers. This research will help to promote the application of new rare-earth bismuth materials in optoelectronic devices.

This work has been funded by the "973" project and key projects of the National Natural Science Foundation of China.

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MIT develops new laser polarization detection technology for analyzing space debris components

Engineers at the Massachusetts Institute of Technology (MIT) recently developed a new laser polarization detection technology that not only determines the location of space debris but also analyzes its composition.

In orbit to Earth's space, hundreds of millions of space junk spins at high speeds, posing a huge threat to spacecraft and satellites. Currently, NASA and the Department of Defense track 17,000 pieces with land-based telescopes and laser radar, but the system only determines the location of the target. The researchers pointed out that the new technology can analyze the composition of a wreck, helping to determine its quality, momentum and possible destructive power.

The technology uses lasers to detect the effect of light on the material. Michael Pascolor of MIT Aerospace said that the reflective polarization mode of paint differs significantly from that of metallic aluminum, so identifying the polarization characteristics is a reliable way of identifying the space debris.

To test this theory, the researchers designed a polarimeter to detect the angle of the reflected light at a laser wavelength of 1064 nm, similar to Ladars' laser and selected materials commonly used in six satellites: white, black, aluminum And titanium, as well as two membrane materials, polyimide and Teflon (polytetrafluoroethylene) that protect the satellites. Polarization filters and silicon detectors are used to detect the polarization of their reflected light. They identified 16 major polarization states and mapped these state features to different materials. The polarization characteristics of each material are unique enough to distinguish it from the other five.

Pascor believes that other aerospace materials such as protective films, composite antennas, solar cells, circuit boards, etc., the polarization effects may also have their own characteristics. He hoped to use a laser polarimeter to build a database of polarization characteristics of various materials. By loading the existing ground-based Ladars with filters, the polarization state of the space debris could be directly detected and compared with the data from the signature database to determine the composition of the debris.

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Ali first public quantum communication technology: used in cloud computing services

Quantum communication is one of the cutting-edge technologies in the field of communications. China not only built commercial quantum communication lines such as the "Quantum Secure Communication Beijing-Shanghai Line", but also successfully launched the world's first experimental satellite "Mozi", which has taken the world's technological frontier.

In June this year, the Ministry of Science and Technology and other four departments jointly issued the "13th Five-Year Plan for Basic Research in National Basic Research", setting out major scientific and technological projects during the "13th Five-Year Plan", including quantum communications and quantum computers.

The confidential nature of quantum communication, has a broad application prospects, has attracted many businesses to participate. Recently, Dr. Ali Xie Chongjin, Chief Communications Scientist of Ali Group, introduced the development plan of Ali NASA Program - Quantum Communication Technology at the "Ali Afternoon Tea" event held in Beijing. According to reports, Alibaba in addition to continuing deep plowing quantum communication technology, but also through Aliyun, the global business output quantum communication security services.

Ali first public quantum communication technology: used in cloud computing services

Alibaba Group chief communications scientist Dr. Xie Chongjin

The most secure information security technology

The scientific community has always believed that the commercial development of quantum communication is faster than quantum computers, and indeed it is. What technology did Ali break through in order to realize the commercial service of quantum communication? What kind of impact will this bring to the social sciences industry?

Xie Chongjin introduction, quantum communication key is quantum channel (fiber or free space, such as satellite or floating platform), the use of optical quantum superposition state carrying shared key, according to the principles of quantum mechanics uncertainty and quantum uncodable principle, Unconditional secure distribution of keys can be achieved, in theory, to ensure the absolute security of information.

Quantum non-clone principle makes the quantum key is not sent to the other process is not stolen, even if stolen, quantum will "self-destruction" and inform the user, use this key to encrypt the information to ensure the safety of information.

Alibaba attaches great importance

In the core of quantum communications and quantum computing, Alibaba has launched world-class results in the first half of this year.

In March, Aliyun released the world's first cloud-based quantum communication commercial service, thus opening up the door for the development of inclusive development of quantum information science. In May, the first computer in the world beyond the early classical computer developed by the Chinese Academy of Sciences and Alibaba Group Light quantum computer was born in China.

According to Ma previously announced "NASA" plan, Ali is currently 20 years after the core technology reserves in order to achieve overtaking, service 2 billion people worldwide, becoming the world's fifth largest economy.

Quantum information is one of the core technologies being stockpiled in the NASA program. In fact, Alibaba began in-depth study of quantum communication in 2013, completed in 2015 the development of quantum transmission gate. In the same year, Ali and the Chinese Academy of Sciences set up the Quantum Computing Laboratory. This move is not only the first quantum computing research center in Asia, but also allows Ali to become the first Chinese technology company to invest heavily in quantum information science.

From the announcement of "NASA" plan by Ma Yun to the beginning of this year, Ali first presented the world's first submerged liquid-cooled server cluster in the Internet industry to achieve a theoretical PUE approximation limit of 1.0; subsequently, it released two world-class quantum information science Results. Currently, it has a strong infrastructure with independent intellectual property rights such as quantum communication, liquid-cooled servers, self-developed network equipment and AliRack. It is carrying dozens of businesses such as e-commerce, cloud computing, finance and manufacturing to serve hundreds of millions of users every day.

Used in cloud computing

According to Xie Chongjin's introduction, Alibaba vigorously promote quantum communications, the core purpose is to allow the technology to achieve universal development, so that more businesses can use quantum communication to bring security.

Since 2013, Ali has invested huge resources in quantum communication technology, and has produced dozens of patents, including QKD (quantum key distribution) algorithm implementation, system architecture, QKD and cloud computing applications, quantum communication cloud Service, and the combination of quantum communication and trusted computing.

The above scientific challenges are challenging all over the world. Xie Chongjin believes that Ali's quantum communications team went into a no man's land in solving these scientific problems.

Stone rhinoceros, Alibaba's senior expert, said that Ali eventually combined quantum cryptography and cloud computing to form a key resource pool, which was provided to users through the Alibaba Cloud resources so as to meet the individual needs of users flexibly.

The social value of quantum communication is more extensive. It can be used not only in national security areas such as military and national defense, but also in the national economy such as finance, data center, Internet of Things, and blockchain.

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Centrifugal pump maintenance

1, centrifugal pump mechanical Seal failure analysis Centrifugal pump shutdown is mainly caused by the failure of the mechanical seal. Mainly due to the failure of the performance of the leak, there are several reasons for leakage: ① static and dynamic ring sealing surface leakage, the main reasons are: flatness of the end surface roughness does not meet the requirements, or scratch the surface; particulate matter between the ends, resulting in two Face can not be the same run; installation is not in place, the way is not correct. ② compensation ring seal leakage, mainly due to: gland deformation, uneven pre-tightening; installation is not correct; seal quality does not meet the standards; seal selection wrong. The actual use of results show that the sealing element failure is the most dynamic parts of the static and static ring end, centrifugal pump seal, static ring end face cracking is a common phenomenon of failure, the main reasons are: ① mounting surface sealing gap is too large, Rinse liquid too late to take away the heat generated by the friction; Rinse liquid leak from the gap in the sealing surface, resulting in overheating and damage. ② vaporization of liquid medium expansion, so that the two ends by the expansion of vaporization and separation, when the two sealing surface force fit, the destruction of the lubricating film resulting in the end surface overheating. ③ liquid medium lubrication is poor, combined with the operating pressure overload, two sealing surface tracking rotation is not synchronized. For example, high-speed pump speed of 20445r / min, the center of the sealing surface diameter of 7cm, pump speed after the line up to 75m / s, when there is a sealing surface can not track the hysteresis rotation, instantaneous sealing surface damage caused by high temperature. ④ seal flushing fluid orifice or filter blockage, resulting in insufficient water, so that machine seal failure. In addition, the sealing surface of the surface of the groove, the end surface of the gap occurs when the gap sealing element failure, the main reasons: ① liquid medium is not clean, hard particles with a little hard, sliding surface with high speed, the end surface of the plan Injury and failure. ② poor coaxial pump drive parts, the pump is turned on each revolution after a week was shaking the friction end, moving the ring trajectory is not the same heart, resulting in end vaporization, overheating wear. ③ frequent occurrence of hydraulic properties of liquid medium caused pump vibration, resulting in seal surface dislocation and failure. Liquid medium on the sealing element corrosion, stress concentration, with hard and soft materials, erosion, auxiliary seal 0-ring, V-ring, concave ring and the liquid medium is not compatible, deformation and so will cause mechanical seal surface damage failure, so Damage to the form of a comprehensive analysis to identify the root causes, to ensure long-term mechanical seal operation. 2, Centrifugal pump requirements after stopping operation ① Centrifugal pump should be shut down after stopping the population of the valve valve, and then turn off the pump after cooling the ancillary system valves. ② high-temperature pump should be stopped according to the provisions of technical documents, after parking should be partial 20 -30 30min half a turn until the pump temperature dropped to 50 ℃ so far. ③ cryogenic pump parking, when no special requirements, the pump should always be filled with liquid; suction valve and the discharge valve should be kept normally open state; the use of double-end mechanical seal of the cryogenic pump, liquid level controller and seal the liquid seal chamber The pump grouting pressure should be maintained. ④ transport easy to crystallize, easy to coagulate, easy precipitation and other media pump, stop the pump should be blocked, and timely flush with water or other media pumps and pipes. ⑤ discharge liquid stored in the pump to prevent corrosion and cracking. 3, the preservation of centrifugal pump ① not yet installed pump unpainted surface should be coated with a layer of suitable anti-rust agent, lubricated bearings should be filled with the appropriate oil, grease-lubricated bearings should only be filled A grease, do not use mixed grease. ② a short time pump clean liquid, flushing, suction lines, discharge lines, pump housing and impeller, side by side net pump housing, suction lines and discharge lines in the flushing fluid. ③ drain the oil bearing box, then add clean oil, thoroughly clean the grease and then fill the new grease. ④ The suction port and exhaust port sealed up, the pump stored in a clean, dry place, to protect the motor windings from damp, with anti-rust liquid and anti-cavitation spray pump housing inside. ⑤ pump shaft rotation once a month to avoid freezing, and lubrication of bearings.

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The fermentation bed contributes to the construction of the chicken house

The fermentation bed contributes to the construction of the chicken house

At present, many breeding specialized households still follow the tradition of breeding, not only to clean up the animal's excrement manually, but also the construction of the housing is not very reasonable, not only ventilation is not fast, very poor ventilation, and the housing is basically Surrounded by excrement, it is difficult to get off the ground. A reasonable housing is very important, because not only can it be well ventilated, it has good ventilation, and it is also windproof and leaking. So the whole is still good. The experts of Jinbao's fermentation bed have given reasonable construction of housing. opinion;

1. Transfer ducks in a timely manner, reinforce the sheds, and lay the groundwork. For low-lying sheds, ducks should be promptly transferred to idle sheds with higher ground and reinforced at the same time to eliminate potential safety hazards. For duck sheds with severe water intake, such as meat ducks that have been immersed in rain for a long time, have great stress, and have no feeding value, should be dealt with as soon as possible in consultation with the relevant cooperative units; for sheds that are slightly influent, they should try to drain water. Lay the litter (straw, sawdust, etc.) in time, and do the groundwork, change the litter, and keep the house dry as much as possible.

2. Strengthen the hygienic work of the house. Because pathogenic microorganisms are prone to large-scale breeding in wet environments, disinfection of the shed must be done. The commonly used shed disinfection drugs include chlorine preparations (such as Weidao disinfectant), iodine preparations (such as iodine-fu), and quaternary ammonium salts (such as baifasha). They can be spray-sterilized with 500600 times of the above-mentioned pharmaceuticals. Attention should be paid to rotation. Medication, insist on disinfection once a day. At the same time to do a good job of drinking water disinfection.

3. Do a good job in disease prevention and control. Rainy and wet weather can easily induce the following diseases, and the mortality rate is relatively high, and farmers should pay great attention to it.

1 enteritis. If this disease occurs, neomycin sulfate, amoxicillin, gentamicin, methaquine and other drugs can be used to prevent and treat the product according to the instructions for use, once every 4 to 5 days. The above drugs can be used interchangeably.

2 E. coli disease. If this disease occurs, apramycin, colistin, ofloxacin, amikacin and other drugs can be used for prevention and treatment, and can be used for 4 to 5 days. The above drugs can be used interchangeably.

In addition to routine disease prevention and control work, immunization work should also be done. Poor environment and frequent stress make it easier for meat ducks to resist disease and make them unable to resist infectious diseases. Therefore, if you want to advance the immune system ahead of schedule, the supplement will be reimbursed.

5. Strengthen nutrition, scientific management, reduce stress response. Daily feeding should pay attention to vitamin supplements, especially vitamin E supplements. It is recommended to supplement vitamins or electrolytic multivitamins at the same time, plus vitamin C, generally 500 grams of vitamin C100 per 500 grams of feed, in order to improve the body resistance, eliminate stress response. In the event of thunderstorms or strong winds and power failures, people should be strengthened in the huts, which is an effective way to eliminate stress on livestock and poultry.

Based on the above, we clearly see that a reasonable bed of fermentation beds is crucial, not only to ensure the safety of animals, but also to reduce the incidence of diseases, long-term living in a dark and humid place, the animals have a high rate of disease, and the transmission rate Is also very extensive, so that the establishment of housing, not only animals can be comfortable in the housing, farmers are also very worry-free, more detailed about the fermentation bed, starter, microbial fertilizer and other exciting content, please pay attention to the treasure Fermenting bed official website () or call our inquiry line, 63623048, 13269217468 free hotline

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A wide range of centrifugal pumps, selected according to need

According to the number of working impeller to classify 1, single-stage pump: that is, only one impeller on the shaft. 2, multi-stage pump: that is, there are two or more impellers on the pump shaft, then the total pump head is the sum of the lift produced by n impellers. According to the working pressure to classify 1, low pressure pump: the pressure is lower than 100 meters of water column; 2, medium pressure pump: the pressure is between 100 ~ 650 meters of water column; 3, high pressure pump: pressure is higher than 650 meters of water column. According to the impeller water classification 1, one side into the water pump: also known as single suction pump, that is, only one inlet on the impeller; 2, bilateral water pump: also known as double suction pump, that is, both sides of the impeller There is a water inlet. Its flow rate is double that of a single suction pump, which can be approximated as two single-suction pump impellers placed back-to-back together. According to the combination of the pump casing to form a classification of 1, the level of open pump: that is, through the axis of the horizontal plane with a joint seam. 2, the vertical joint pump: that is, the junction plane and the axis of the vertical. Classified according to the pump shaft position 1, horizontal pump: the pump shaft is in a horizontal position. 2, vertical pump: pump shaft is located in the vertical position. Press the impeller out of the water leads to the pressure chamber classification 1, volute pump: water from the impeller, directly into the shape of the pump shell with a spiral. 2, guide vane pump: water from the impeller out into the guide vane set outside it, and then into the next level or into the outlet pipe. Centrifugal pump installation height and working classification 1, self-filling centrifugal pump: pump shaft below the sump pool surface, start without irrigation, can be automatically activated. 2, suction centrifugal pump (non-self-filling centrifugal pump): pump shaft above the sump pool surface. Before starting, it is necessary to fill the pump housing and the suction pipe with water first, and then drive the motor so that the impeller rotates at a high speed. The water is thrown out of the impeller by the centrifugal force, a negative pressure is formed in the center of the impeller, the water in the suction tank enters the impeller under the action of atmospheric pressure, Also by the high-speed rotation of the impeller role was thrown into the water pressure impeller. Usually we say that a pump is a multistage pump, which means how much the impeller. According to other structural features, it may be horizontal pump, vertical joint surface pumps, vane pumps, high pressure pumps, single-inlet pumps and so on. So according to different, the name is not the same. In addition, according to the use can also be classified, such as pumps, pumps, condensate pumps, ash pumps, circulating pumps and so on. Classification Type Centrifugal Pump Features By suction Single suction pump Liquid flows into the impeller from one side, with axial force Double suction pump The liquid flows into the impeller from both sides, there is no axial force, the flow of the pump is almost one more than the single suction pump Times the number of single-stage pump shaft only one impeller multi-stage pump The same pump shaft mounted on two or more impeller, the liquid flow through each stage of the impeller, the more the series, the higher the head according to the pump shaft orientation horizontal Horizontal shaft pump shaft placed perpendicular to the horizontal plane according to the shell type Split pump shell according to the vertical plane with the shaft part of the segment with a long bolt connection between the open pump housing through the shaft center Divided volute casing in line plane Centrifugal pump with spiral pressure chamber, eg common end-suction cantilever centrifugal pump Turbine pump Centrifugal pump with guide vane pressurized water chamber Pipe with special structure Pump as Pipeline part of the installation without the need to change the pipe shield Pump impeller and motor rotor together, and in the same sealed shell, without the use of sealing structure, are non-leakage pump Magnetic pump in addition to import and export, the pump fully enclosed Pumps and electricity The machine uses magnets to attract each other and drives the self-priming pump. No need for high-speed pump to start the pump. The speed of the pump shaft is increased by the speed increasing box. The general speed can reach over 10000r / min. It can also be called partial flow pump or tangent increase Pump vertical tube pump import and export takeover in the upper part of the same height, there are two inner and outer shell, the inner shell by the rotor, guide vanes and other components, the outer shell for the import diversion channel, the liquid inhalation from the bottom.

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New research femtosecond time scale changes the color of the laser: the laser industry or a new version

How to change the color of the laser? One popular method is to use the so-called second harmonic (SHG) effect, which doubles the frequency of light and thereby changes its color. However, if this non-linear effect is achieved, a polar crystal is required in which the inversion symmetry of the structure is destroyed. Therefore, the discovery of crystals that cause strong octaves is an important research topic in materials science.

Observation of nonlinear optical phenomena, such as second harmonic effects, requires a finite second-order electrical polarization in the structure that occurs in any polar structure without the need for symmetric inversion and intense laser pulses. In this work, BiCoO3, a perovskite cobalt oxide, is used in which one of the top-corner oxygen atoms moves along the c-axis to form a Co-O5 conical structure in the molecular structure, resulting in an asymmetric structure and at room temperature Spontaneous polarization.

For laser pulses, which achieve strong electromagnetic waves in the terahertz region with electric field intensities of up to about 1 MV per centimeter, Hideki Hirori and his team developed using international motors and systems and achieved nonlinear supercooled BiCoO3 crystals Quick control.

Yoichi Okimoto, a colleague at Tokyo Institute of Technology, is particularly interested in the changes in the second harmonic intensity of a BiCoO3 crystal at terahertz radiation at room temperature. It is noteworthy that the second harmonic effect has been enhanced by more than 50%, which shows that the use of terahertz laser in this way can significantly improve the advantages of nonlinear crystals. In addition, this effect occurs on a time scale of 100 femtoseconds (10-13 seconds), which may be suitable for some very high speed optoelectronic devices.

Speaking from the physical mechanism, the ultrafast enhancement of the second harmonic signal can be reasonably seen in the dd transition, ie from the occupation of the electron hole to the unoccupied excess, within a wide band of terahertz pulses. Photoexcited electrons elongate the top oxygen atoms of the Co-O5 cone structure in the crystal due to the photo-electric effect, thereby increasing the polarity of the structure (thus forming a second-order electrode polarization).

Future research will focus on the higher-order nonlinear optical responses of photo-excited BiCoO3 and other polar oxide materials and the use of terahertz pulses for rapid measurement of mechanical details of these special materials.

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Beware: Drink beer will also be allergic

The Spanish researchers found that some people have an allergic reaction after drinking beer. The symptoms include: swollen throat, mouth and lips sting, gasping mouth, swollen tongue and so on. In a case of a beer allergic reaction, a 20-year-old man had swollen tongue, pseudomembranous laryngitis, and fainted half an hour after drinking beer. This life-threatening allergic reaction usually occurs after some people eat peanuts or shellfish and drink beer.

Sylvia Fernandez of the Affiliated Hospital of the University of Medicine, Tucumbra, Madrid, Spain, and colleagues report that beer allergies may not be common in terms of the number of allergies that result from drinking beer, but it should also cause people to Enough attention.

Researchers said that the main ingredient of beer --- barley, may be the culprit leading to beer allergies. In order to confirm the beer allergy, Spanish medical staff made two sets of tests on the patient. First, skin tests were performed on 3 patients, respectively, to puncture the patient's skin to test their reaction to beer extract and barley extract. The trial found that at least three patients responded to one extract.

The two patients also took gradually increasing doses of barley malt and iced dry beer tablets, all of which showed signs of an allergic reaction to the beer.

With the increasing consumption of beer today, the new research conclusion of beer allergies may give people a certain warning effect.

Pork is a very common meat in life, especially in China. Pork consumption is much higher than other meats and is the main source of meat. Pork tastes and tastes very good, it doesn't get tired when you eat it regularly, and it has a variety of practices. It can be delicious with a variety of ingredients.

Although the pork chop is made of pork, it has no fatty feeling at all, and it is particularly chewy. It is processed through many processes, not to fry or cook pork. The pork that is made out has a lot less oil, and the feeling of eating meat is particularly cool. The authentic pork chop uses the pig's hind leg meat. This part of the meat is mainly lean meat, and the fat is rare. It is more suitable for pork. breast

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Retriever Communications Conducts Industrial Site IIOT Technical Usage Research

Retriever Communications, a provider of enterprise mobility automation solutions for the industrial arena, announced today that it plans to co-sponsor a work plan with UTS over the next two years to gain insight into the actions and preferences of field personnel. This study will rely heavily on real-world observations and in-depth interviews to assess the role of innovative technologies in on-site workflow.

In the next 24 months, researchers will work with industrial and manufacturing companies to study the technology in two key areas:

User Experience: The Root of The Problem Is New Technology Boost Site Productivity at Home or Mere Imperfections and Burden? For example, what are the implications of using voice technology in workflow for point-specific data capture? How can augmented reality help solve display problems?

Industrial Internet: We all know that better data can help make better decisions. This area of ​​investigation will confirm how best to integrate and present the machine's data (such as air-conditioning meters) for end-user approval. In addition, the study will examine the feasibility of using AR technology for distance learning and on-site operation guidance to confirm its impact on work efficiency.

Like the heuristic research for mobile apps in 2016, the research will be led by Professor Andrew Johnston. "We have a strong, hands-on team focused on interaction with UTS and we are very excited to continue working with Retriever Communications on the second project, and we look forward to exploring new technologies in the real world," he said. And discover the strengths and weaknesses and how best to use them to improve the on-site staff experience. "

Through this research, UTS will gain insight into how new technologies affect the operation of field workers and the future of industrial enterprises. Q4 2017 The first study results will be released.

Mary Brittain-White, CEO of Retriever Communications, said: "With the rise of new technologies, the fundamental issue in the industry has become a matter of how to make the site more efficient. History has proven that new technologies are totally ineffective if not field-centric. "

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Reminder: Problem foods that cannot be eaten in autumn and winter

At the turn of autumn and winter, it is the peak season for Chinese cabbage, sweet potato, pickled pickles, and edible fungus. Xinhua News Agency recently published an article on 16 kinds of “questionable” foods that could not be eaten during the fall and winter season. It reminded the public that we specifically invited experts to understand the 16 kinds of foods that cannot be eaten.

Green tomatoes: immature green tomatoes contain toxic substances solanine, it is an alkaloid, hemolytic, can cause edema, cerebral congestion and other embolism. If eaten may have nausea, vomiting and other symptoms of poisoning, eaten more dangerous.

Rootless bean sprouts: In the production process, multiple application of herbicides leaves the growing bean sprouts without roots. Herbicides contain harmful substances that cause cancer, teratogenicity, and mutagenesis.

Fresh daylily: Fresh yellow flowers are extremely toxic and dry products are non-toxic. Because fresh lily contains colchicine, this toxin can cause dryness in the throat, burning sensation in the stomach, and hematuria. If you want to eat fresh daylily must be cooked thoroughly.

Germination of green potatoes: The buds of germinated potatoes (potatoes) and the green skins of solanum are high in alkali content, and they are prone to cause hemolytic poisoning. If you don't germinate, you can dig out the green shoots and the surrounding parts, and put some vinegar in the cooking before eating.

Rotten ginger: The rotted ginger produces a highly toxic safrole. People eat this toxin, even if the amount is small, it can cause liver cell poisoning and degeneration, triggering liver cancer, esophageal cancer and so on.

The brown core of sugar cane: commonly known as drug cane, that is, it smells like wine. The spoiled cane is black and tan in color and tastes like alcohol. This is caused by sugarcane being infected by Fusarium moniliforme and producing toxins.

Moldy Tea: Moldy tea is a result of contamination with Penicillium and Aspergillus. Light weight causes dizziness, diarrhea, and weight can lead to necrosis of vital organs.

Long-spotted sweet potatoes: Long dark spots on sweet potatoes are caused by infection with the black spot fungus, which is a kind of fungus that can easily poison after eating and damage the liver and lungs.

Tremella fuciformis: Tremella fuciformis, which is yellowish, is caused by Flavobacterium contamination. Eating can cause dizziness, abdominal pain, and diarrhea.

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University of Texas has developed a biosensor to prevent diabetes

Researchers from the University of Texas have developed a wearable biosensor that detects three of the compounds that cause diabetes: cortisol, glucose, and interleukin-6. The researchers dared to assume that if this sensor Connect the phone, then you can monitor real-time changes in diabetes.

The biosensor works by sweat to detect the three compounds that affect diabetes. The researchers said: "Type 2 diabetes affects many people and the disease that plagues the world can be brought under control if the most appropriate management and regulation are achieved."

"If a person is under long-term stress, the level of cortisol rises, resistance to the body's insulin occurs, blood glucose levels move away from the normal range and develop into prediabetes, or type 2 diabetes, etc. If this happens In the case of people, your body will show an inflammatory state. This inflammatory marker, IL - 6, will indicate that your organs begin to be affected as well.

"Based on this principle, we thought of the possibility of developing a product that predicts the onset of diabetes by monitoring changes in cortisol, glucose, and interleukin-6, as well as helping diabetic patients manage their own blood glucose levels after repeated verification , We finally found a precise molecular combination that measured the continuous changes in the three compounds through the small amount of sweat the body secretes. "

In addition, researchers link the biosensor to cellphone applications so that you can keep track of your health changes.

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Tesla and other manufacturers to develop new technologies: to avoid distracted drivers in automatic driving

Carmakers want to keep their focus on driving assist systems like the Tesla Autopilot with tiny cameras, sensors, steering wheel monitoring equipment, and voice prompts. Last May, a Tesla Model S owner died in an accident when Autopilot mode was activated. The U.S. Transportation Safety Board (NTSB) said in a report last week that despite repeated vehicle warnings, the owners left the steering wheel with both hands for a long time.

However, the accident shows that automakers need the advantage of fully automated driving capabilities. Unless the vehicle can be safely driven under any circumstances, the driver must remain vigilant and be ready to take control of the vehicle.

As the U.S. government department responsible for investigating major traffic accidents, the NTSB said the driver held the steering wheel in only 25 seconds in just 37 minutes during a 41-minute drive. After receiving a sound or visual warning, the driver just held the steering wheel for 1 to 3 seconds. GM introduced the driver assistance system called Super Cruise. The technology was originally planned to be released late last year, but General Motors said at the time that the technology was not yet ready. Currently, the launch of this technology is expected to fall this fall.

Barry Walkup, chief engineer at Super Cruise, said GM has added "driver attention, insisting on monitoring drivers." The system uses a small video camera to align the driver and uses infrared to track the driver's head and learn where the driver is looking. In addition, the system also integrates facial recognition software. If the system detects that the driver is not paying attention, it will prompt the driver to divert attention to the road. If the driver does not respond then the alarm will be escalated, including lighting up the steering wheel, displaying visual cues, generating alarms on the seat, and sounding audible alerts. If the driver still does not respond, then the car will stop driving.

Audi's system controls the steering wheel and brake system at speeds of 40 miles per hour (64 km / h). The system requires the driver to confirm the steering wheel every 15 seconds. Audi said the driver will be given a voice prompt, if the driver did not respond, then the car will stop.

As the primary regulatory authority for autonomous driving technology, the NHTSA will not test or pre-approve any driver assistance system prior to installation by a car manufacturer. When the department receives a complaint or does an investigation after the accident, whether the possible defect poses a risk to driver safety. Tesla's accident in May 2016 raised concerns about the regulation of autonomous vehicles.

The NTSB will post the probable cause of the incident and may also make recommendations to the NHTSA. However, the department does not plan to hold public hearings.

In September 2016, Tesla released new restrictions on the Autopilot system. The outside world had previously worried that Tesla's promotional autopilot function would give drivers a false sense of security. In the upgraded system, if the driver does not respond to the sound warning, then the driver will temporarily stop using the system.

Tesla CEO Elon Musk said in September last September that if there was no vehicle in front and Tesla was traveling at 45 miles per hour for more than a minute, the system would send out Alarm. If the driver ignores 3 audible alarms within 1 hour, the system will be temporarily shut down until it stops.

Musk said at the time that this type of autopilot system is more likely to crash for professional-grade users. He pointed out that in previous systems, some users received 10 alerts within 1 hour. "They are not beginners, they are experts, they're used to it and ignore car alarms on many occasions, and that's actually a conditioned reflex."

In a separate report, NHTSA said Tesla monitors drivers using drivers' steering, turn signal and speed settings.

Waymo, an alphabet company, is also researching autonomous vehicles, but the company has taken a different approach. The company believes it is wrong to ask drivers to focus on their actions while driving. Waymo's research focuses on fully autonomous vehicles, not driver assistance systems. Waymo CEO John Krafcik said: "We do not want to develop a better car, but to develop a better driver."

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Bike Lane Bike Lane uses RFID technology to speed up service

Bike Lane, the largest bicycle sales and service company in Houston, is expanding its RFID solutions to track maintenance and bicycle for sale. Herb Beimgraben, co-owner of Bike Lane, said the company began tracking new bicycles using RFID technology in warehouses from 2013 onwards, which has helped to increase sales and reduce staff time spent on inventory searches. TracerPlus RFID technology is provided by PTS.

Bike Lane is a Houston family business that sells and repairs bicycles and their accessories. However, due to its limited space, the company needed to stocked boxed stock in tight warehouses, making it difficult for employees to find the stock they needed.

The store has 8,000 square feet of store and storage area and 300 to 400 new bicycles in eight 30-foot shelves in the storage area. The size of a bike's outer box is about 6 feet by 1 foot by 3 feet and varies in style, size and color. Beimgraben said: "We use every square meter of space."

The assembler in the store is responsible for finding the bike needed before packing. This process was previously manual and took a long time. In addition, consumers sometimes want to see bike models not shown on the facade, which requires that employees look for it in the warehouse. Before an RFID system was deployed, it meant that employees needed to search through the warehouse for the labels they wanted and find the labels they sought. This process can take 15 to 30 minutes. When the store is busy, this time-consuming is basically unacceptable.

So four years ago, Beimgraben started looking for a solution and eventually chose the TracerPlus system, which uses handheld readers, RFID tags and applications to collect and retrieve data in-store. Using the TracerPlus RFID tagging solution, shop personnel will attach an EPC UHF RFID tag with a unique ID number to the case and record label and bike information on paper. In this way, the company recorded warehouse bike information.

When employees look for boxes, they need to enter the ID number into the Zebra Technologies MC9190-Z RFID reader. Then, the reader enters Geiger counter mode. Then, employees just need to carry the card reader into the storage area, as the reader approaches the label, the sound becomes louder. This allows employees to find the right item in just a few seconds.

Now, if a consumer wants a bicycle model not shown in the store, it will take only a short time for the employee to find it.

Beimgraben said the store is working on ways to expand the use of technology because the system is performing well. Currently, the company has used labels for bicycle repair tools and bicycle repair.

Often, stores place 20 to 30 bicycles in the service area. Sometimes, the customer calls to ask about the status of the bicycle repair or to ask for a change of color of the handle or tape. By using the handheld reader, workers can quickly find a particular bike, update customers, or change work orders.

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Magnetic pump composition and structure characteristics

Magnetic pump (magnetic drive pump) mainly by the pump head, magnetic actuator (magnetic cylinder), motor, connecting the backplane and other parts of several components. Magnetic pump Magnetic drive by the outer rotor, the inner rotor and the non-magnetic isolation sleeve composition When the motor drives the outer rotor rotation, the magnetic field can penetrate the air gap and non-magnetic material, driven by the impeller with the inner rotor for Synchronous rotation, synchronous power transmission to achieve non-contact, easy to leak of the dynamic seal structure into zero leakage static seal structure. As the pump shaft, the inner rotor is completely closed by the pump body and isolation sleeve, thus completely solving the problems of running, running, dripping and leakage, and eliminating the problems of inflammable, explosive, toxic and harmful media in the refining and chemical industries through the pump seal Leakage of security risks. 1. Permanent magnets Permanent magnet made of rare earth permanent magnet has a wide range of operating temperature (-45-400 ℃), high coercive force and good anisotropy in the direction of magnetic field, and will not demagnetize when the same pole is close Phenomenon, is a good source of magnetic field. 2. Isolator Sleeve When using a metal isolator, the isolator is in a sinusoidal alternating magnetic field that induces eddy currents and converts it into heat in a cross section perpendicular to the line of magnetic force. The eddy current is given by: where Pe-eddy current; K-constant; n-pump rated speed; T-magnetic drive torque; F- pressure inside the spacer; D- spacer inner diameter; resistivity of a material; Tensile strength. When the pump is designed, n, T is given conditions, to reduce the eddy current only from F, D and other considerations. Selection of high resistivity, high strength non-metallic materials made isolation sleeve, the effect of reducing eddy current is very obvious. 3. Cooling fluid flow control Pump operation, you must use a small amount of liquid on the inner rotor and the isolator sleeve between the annular region and the sliding friction bearing pair was washed and cooled. Coolant flow is typically 2% to 3% of the pump design flow, and the annulus area between the inner magnet rotor and the isolation sleeve generates high heat due to eddy currents. When the cooling fluid is not enough or flushing hole poor, blocked, it will lead to the medium temperature is higher than the permanent magnet operating temperature, the magnetic rotor gradually lost magnetism, the magnetic actuator failure. When the medium is water or water-based liquid, the annulus area can be maintained at 3-5 ℃. When the medium is hydrocarbon or oil, the annulus area can be maintained at 5-8 ℃. 4. Slide bearing magnetic pump sliding bearing materials impregnated graphite, filled with PTFE, engineering ceramics. As a result of engineering ceramics has a very good heat, corrosion-resistant magnetic pump, abrasion resistance, so the use of magnetic bearings multi-purpose sliding bearing engineering ceramics. As the engineering ceramics are very brittle and the expansion coefficient is small, so the bearing clearance must not be too small, in order to avoid the occurrence of axial accidents. As the magnetic pump sliding bearings to the lubrication of the media, it should be based on different media and the use of conditions, the use of different materials made of bearings. 5. Protection When the driven parts of the magnetic actuator operate under overload or the rotor is stuck, the main and driven parts of the magnetic actuator will automatically slide off to protect the pump. In this case, the permanent magnet on the magnetic actuator will generate eddy loss and magnetic loss under the action of the alternating magnetic field of the active rotor, causing the temperature of the permanent magnet to rise and the magnetic actuator to slip off.

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Wastewater "alchemy" hidden deep in the desert

A sprinkler that will be used in drip irrigation

At the junction of hot sand and blue sky, there is a large low fruit tree that can not be seen. The Israeli farmer Abu Tambi pointed at the fruit tree and said: "Our biggest problem now is the lack of labor and the fruit trees can only grow so much."

Abu Tambi said that ten years ago, he could only plant cotton and some inedible plants in the Negev desert, and the days were tough. Later, the desert appeared better "Mediterranean", combined with intelligent drip irrigation technology, now not only "what can species", and grow high quality fruit more popular with Europeans, through export trade, he earned a lot Last year, money bought a new agricultural machine. Abuttabha's rite of wealth just shows the tip of the iceberg of Israel's smart water management capabilities. Behind this little story, in fact, contains the Israelis how to "waste water regeneration" in the desert, how to "water into gold," a big cause.

Recently, the reporter of Guangzhou Daily penetrated into the desert in Israel and witnessed how the Israelites made use of the desert and waste water to turn the desert into a "Mediterranean" course.

This year marks the 25th anniversary of the establishment of diplomatic relations between China and Israel. From June 6 to June 6, the delegation of Guangdong Province visited Israel to attend the China (Guangdong)-Israel Economic and Trade Cooperation and Exchange Conference. The water resources management, wastewater treatment, water environment protection, has been an important issue of urban environmental governance in Guangzhou. Under the background of deepening economic and trade cooperation, Israel's well-developed water resources management technology is exactly what Guangdong needs to learn from.

Desert agriculture:

Wastewater irrigates good quality fruit

Israel is slightly higher latitude in Guangzhou, located in the subtropical. Land area slightly larger than Beijing, but nearly half of desert areas, year-round rain. Although still in June, the sun is already hot. Reporter from its second largest city of Tel Aviv, all the way south, came to the Negev desert.

The arid Negev desert not only has rough gravel, but also many thriving settlements. In the southwestern Negev desert there are some special forms of settlement that develop agriculture through collective farming on private leased land. Near one of the settlements reservoirs, the reporter saw the farmer Abu Tambi, a middle-aged, great farmer who looked over and over from time to time to the small kingdom on the edge of his reservoir - a large green forest that was not yet ripe Pomegranate.

Israel's desert reservoir is a local scene: a huge blue artificial lake appeared in the vast hot sand, clear water, eyes full of cool. Aqua blue, comparable to the Mediterranean Sea on the edge of Tel Aviv.

"The water depth is about 15 meters." The technical director told reporters, "Inside are treated wastewater." Reporters learned that such a "reclaimed water reservoir" in the Negev desert there are many, supporting a lot of settlements Agriculture. The treated wastewater, although not used as drinking water, is suitable for irrigation. To date, the treated wastewater has been the most important source of agricultural water in the desert of Israel.

In many less-developed countries, irrigating untreated wastewater is not uncommon, but harmlessly used, at the core of which is the "decontamination" of wastewater, the removal of heavy metals from water quality, and the pollution of the land, which is exactly where the Israelites are . For waste water as irrigation water, Abu Tambi said the water quality in the reservoir is excellent and there is no need to worry about hygiene and heavy metals residues. As these fruits are basically exported to Europe, Europe will frequently send people to monitor the water quality of the reservoir, "twice a week to take water samples," to ensure water quality and safety.

Abu Tambi said, "Now take a look at this large pool, water quality do not have to worry about."

In addition, due to the widespread adoption of highly water-saving and smart drip irrigation technology in Israel's agriculture, water consumption is more than 40% less than that of normal irrigation. The fruit trees in Abu Tambi are no exception, and water is not lacking.

Benefiting from the intense sun and abundance of water in the desert, in addition to planting this weed-tolerant jojoba (jojoba oil is famous skin care products), as well as potatoes and a variety of fruits, even Some high-water-consuming plants also grow very good, taste good. As the first country in the world to try to grow crops, Israel's export of fruits is highly competitive. Abu Tambi is also one of the peasants who have made huge gains from it and is now fully capable of continuing to expand the orchard.

Wastewater regeneration:

Mysterious sand in the Shafuddan wastewater treatment plant

The success of Abtapa does not come from personal effort, but the infrastructure is essential for wastewater treatment, transport and storage. However, infrastructure alone is not enough to promote the establishment of this economic model.

"Farmers do not irrigate the treated waste water right from the start," Abbott said.

He said that the mode of export agriculture that is now being irrigated with treated waste water has been established step by step over the years. Various obstacles and the "diastolic" mentality of the audience will take a very long time to overcome. The key word to solve all these problems is "Shafdam," the largest and most advanced wastewater treatment plant in Israel and the Middle East. It is the origin of reclaimed water irrigation.

Shafuddan wastewater treatment plant is located not far south of Tel Aviv, was first built in 1969. When reporters came here, a group of pupils were visiting from the wastewater treatment plant. To cherish the education of water resources, Israel has always paid attention to starting from the baby. Nowadays, Shafdam is not only a wastewater treatment plant, but also has a large exhibition hall resembling the structure of the Aquarium. It also details its history and decontamination mechanism.

Schaffen has many of the world's many wastewater treatment plants have the basic decontamination steps: separated from the large scum, gravitational precipitation of solid sediment, semi-solid organic matter, and then let the wastewater soluble and bacteria in a certain temperature Control each other under the conditions, and most of the decomposition. However, the quality of the treated effluent thus obtained is still not high enough to be used for irrigation. In this regard, Shafdam there is another secret weapon - one of Israel's most: sand.

Reporters came to Shafudan next to a huge container, where smell of waste water has not been heard. The narrator told reporters the principle of sand water purification.

It turns out there are many sand dunes near Shaftean. Aquifers exist beneath the sand dunes. The crude wastewater is injected into this aquifer, allowing it to see through half a year to one year of seepage, which can eventually become very clean.

It should be noted that this process is also confirmed in advance will not be contaminated to other nearby clean water. It is these highly purified wastewaters that made the first batch of educated peasants of the year interested

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General overview of shielded pumps

Common centrifugal pump drive is through the coupling of the pump impeller shaft and the electric shaft connected to the impeller and the motor together to rotate work, and the shield pump is a non-sealed pump, pump and drive motor are sealed in a Pumped medium filled pressure vessel, the pressure vessel is only static seal, and by a wire group to provide a rotating magnetic field and drive the rotor. This kind of structure has canceled the rotary shaft sealing device that the traditional centrifugal pump has, therefore can be completely leakless. Shield pump to pump and motor together, the motor rotor and pump impeller fixed on the same axis, the shield sleeve motor will be separated from the stator and rotor, the rotor is transported medium, the power through the stator field Pass to the rotor. In addition, the shield pump manufacturing is not complicated, the hydraulic end of the centrifugal pump can be used in accordance with the structure type and the relevant standard specifications to design and manufacture. Features: 1, the motor and pump integrated structure, all static seal, the pump is completely leak-free; 2, closed, no leakage of toxic and hazardous substances can be transported liquid; 3, using shielded water-cooled motor and the abolition of cooling Fan makes the pump quiet operation of low noise, suitable for high ambient noise requirements of the occasion; 4, the use of transport medium lubrication of graphite sliding bearings, lower operating noise and without manual refueling, reducing maintenance costs; In recent years, the bearing material Also added silicon carbide SIC, superhard, etc., better life than graphite bearings. 5, the vertical structure can be installed on the pipe like a valve, easy and quick installation, and maintenance only when the motor and impeller can be extracted without removing the pipe. 6, can be installed with shock absorbers or shock absorbers to run, so that pump noise in operation is lower. Use range: 1, the basic type of conveying ordinary materials; 2, conveying reverse-circulation and vaporization of materials and reverse pressure type; 3, conveying high-temperature materials, high temperature separation type, the temperature is usually below 350 degrees; 4, 5, conveying high melting point material of high melting point type; 6, conveying material level is lower than the self-absorption type of pump inlet, self-absorption height should be less than 5 meters. A civil use; 1, ground source heat pump air conditioning circulating water system; 2, lithium bromide air conditioning unit air-conditioning pumps, transformer pumps, locomotive pumps; 3, heating heating circulating water system; 4, fire water booster system; Booster system. Second, Industrial and military aerospace 1, chemical and pharmaceutical industries with toxic and hazardous liquid transport; 2, space rocket launch fuel before refueling; 3, nuclear power plants with nuclear-screened electric pump.

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