Last year, Beijing ushered in the closing year of the first phase of the national "Atmosphere Ten". What is the effect of five-year atmospheric control? Yesterday morning, the Municipal Environmental Protection Bureau held a press conference to take stock of the air quality improvement and air control measures in 2017 and the past five years.

　　(Reporter Wang Bin) The Beijing Youth Daily reporter learned from the press conference held by the Municipal Environmental Protection Bureau that the average annual concentration of PM2.5 in this city was 58 μ g/m3 last year, which was 20.5% lower than that of the previous year, and the national "Ten Atmospheric Articles" mission goal was achieved. Excellent days increased by 28 days compared with 2016, reaching 226 days; The number of heavy pollution days decreased by 16 days to 23 days. In addition, in the past five years, the average annual concentration of major pollutants in Beijing has dropped significantly, especially sulfur dioxide. In 2017, the average annual concentration of sulfur dioxide dropped to single digits for the first time, only 8 μ g/m3.

　　Last year, the heavy pollution day was only 23 days.

　　According to the relevant person in charge of the Municipal Environmental Protection Bureau, in 2017, the average concentration of PM2.5 in Beijing was 58 μ g/m3, down 20.5% from the previous year; It decreased by 35.6% compared with 2013. In addition, the average annual concentrations of sulfur dioxide, nitrogen dioxide and PM10 were 8 μ g/m3, 46 μ g/m3 and 84 μ g/m3, respectively, which were all improved year-on-year, and decreased by 20.0%, 4.2% and 8.7% respectively compared with 2016.

　　Among the above four main pollutants, the average annual concentration of sulfur dioxide has reached and is far superior to the national standard, but the average annual concentrations of nitrogen dioxide, PM10 and PM2.5 still exceed the national standard. Especially PM2.5, compared with the national standard of 35 μ g/m3, exceeded the standard by 66%. This shows that the improvement of air quality in Beijing will still be a long-term process.

　　In 2017, the number of days with excellent air quality in Beijing was 226, an increase of 28 days over 2016; The heavy pollution day was 23 days, 16 days less than that in 2016.

　　The number of days when air quality reaches the standard will increase by 50 days in five years.

　　Last year, it was the closing year of the first phase of the national "Atmosphere Ten". Compared with 2013, the average annual concentration of major pollutants in Beijing decreased significantly. Sulfur dioxide, the most obvious decline, dropped by 70.4%. Last year, the average annual concentration dropped to single digits for the first time, only 8 micrograms per cubic meter. Followed by PM2.5, with a decrease of 35.6%.

　　According to the relevant person in charge of the Municipal Environmental Protection Bureau, from 2013 to 2017, the number of days of air quality compliance in Beijing increased significantly, with 176 days in 2013 and 226 days in 2017, an increase of 50 days. Among them, the number of first-class excellent days increased from 41 days in 2013 to 66 days in 2017, an increase of 25 days.

　　From 2013 to 2017, the days of heavy air pollution in Beijing were 58, 47, 46, 39 and 23 days respectively, showing the characteristics of decreasing year by year; The number of days of heavy pollution decreased by 35 days in five years, and the incidence of heavy pollution decreased significantly.

　　In the past five years, the concentration of PM2.5 in various regions of Beijing has been decreasing year by year, and the decline is significant. In 2017, the concentration level in each region was significantly lower than that in 2013, and the overall spatial distribution was still characterized by high in the south and low in the north, but the concentration gap between the north and the south decreased.

　　In 2020, the average annual concentration of PM2.5 will drop to 56 micrograms.

　　What is the goal of improving air quality in Beijing in the future? Xiang Li, director of the Atmospheric Environment Management Office of the Municipal Environmental Protection Bureau, said that in the next stage, the Beijing Municipal Association will continue to improve air quality. The new Beijing Urban Master Plan clearly states that under normal meteorological conditions, the average annual concentration of PM2.5 in Beijing will drop to 56 μ g/m3 by 2020, and the atmospheric environmental quality will be fundamentally improved by 2035. "This has actually given a clear plan for the goal and roadmap of atmospheric prevention and control, and the next stage will strive to achieve this goal."

　　focal point

　　The overall improvement of the atmosphere is the result of "human efforts"

　　Controlling air pollution is the result of "people work hard and heaven helps". Liu Baoxian, deputy director of Beijing Environmental Monitoring Center, revealed yesterday that in 2017, the frequency of inversion was low, the air was dry and the frequency of north wind was high. In 2017, Beijing’s air quality improved significantly under the combined effect of continuous air pollution reduction and superimposed favorable atmospheric diffusion conditions.

　　So, how much power did "God help" contribute? Wang Shuxiao, a professor at Tsinghua University Institute of Environment, said that after preliminary assessment, the meteorological conditions have not changed much in the past five years. Take 2017 as an example. Last year, the meteorological conditions were more helpful in the fourth quarter. Cold air activities were frequent and the temperature was low. Four heavy air pollution processes occurred, resulting in five days of heavy pollution, which was significantly lower than the previous two years. However, the meteorological conditions in January and February 2017 were not conducive to the spread of pollution. "So overall, the meteorological conditions in each month of 2017 will be offset. In the case of slightly favorable meteorological conditions, the overall situation is ‘ People work hard ’ The result. However, the impact of meteorological conditions on air quality is complicated, and we are still continuing to evaluate it. " Wang Shuxiao said.

　　Yu Jianhua, chief engineer of Beijing Environmental Protection Bureau, said that the focus of "people’s efforts" is emission reduction, and the role of "God’s help" is diffusion. The intensity of "human efforts" can be quantified, but "God helps" can’t be planned. In any case, people will keep trying.

　　A new round of PM2.5 source analysis is underway.

　　In 2014, Beijing released the source analysis of atmospheric PM2.5 from 2012 to 2013. The main components of PM2.5 in the air are organic matter, nitrate, sulfate, crustal elements and ammonium salts, accounting for 26%, 17%, 16%, 12% and 11% of the mass concentration of PM2.5 respectively. Through model analysis, among the sources of PM2.5 in the whole year, the regional transmission contribution accounts for about 28% to 36%, and the local pollution emission contribution accounts for 64% to 72%. Among the local pollution contributions, motor vehicles, coal burning, industrial production and dust are the main sources.

　　In the past five years, based on this, the city has accurately controlled air pollution through emission reduction measures such as clean energy transformation of coal-fired boilers, loose coal treatment in rural areas, adjustment and withdrawal of enterprises that do not meet the functional orientation and pollution of the capital, and scrapping and transferring old motor vehicles. Practice has proved that the source analysis of PM2.5 is a powerful means to improve air quality.

　　In the past five years, the structure of atmospheric energy has been constantly changing, and pollutants have improved significantly. Correspondingly, the source of PM2.5 has also changed. In the future, will Beijing study and release a new source analysis of PM2.5? Liu Baoxian, deputy director of the Municipal Environmental Monitoring Center, said that a new round of source analysis is also in full swing, and relevant results will be released later.

　　This group/reporter Wang Bin

　　The three A-share indexes collectively pulled back in early trading. As of midday, the Shanghai Composite Index fell by 1.19%, the Shenzhen Component Index fell by 1.24%, the Beizheng 50 index fell by 0.22%, and the Growth Enterprise Market Index fell by 1.23%. Half-day turnover in Shanghai and Shenzhen stock markets was 466.9 billion yuan. Individual stocks fell more and rose less. More than 4,000 stocks in the two cities fell, and northbound funds sold 10.054 billion yuan in half a day.

　　On the theme of the sector, diet pills, pharmaceutical business and CRO concepts were among the top gainers, while securities and gas sectors were among the top losers.

　　On the disk, the concept of diet pills led the rise, with Shengnuo Bio rising by over 18% and () rising by over 9%. The pharmaceutical business was among the top gainers, with () and () both trading daily. Brokerage stocks led the decline, (), () once fell. The gas sector was among the top losers, with () and () falling more than 5%.

　　Plate analysis:

　　Straight flush hot stock list:

　　Transaction review:

　　At 09: 25, the A-share market opened, the Shanghai Composite Index opened flat, the Shenzhen Component Index opened 0.10% higher, and the Growth Enterprise Market Index opened 0.10% higher. The concepts of securities and diet pills were among the top losers.

　　At 09:27, the securities sector started to fall, () fell more than 7%, and Hongta Securities, Pacific, () and Jinlong shares followed suit.

　　At 09:29, the opening of real estate development was active. Shenzhen Zhenye A and () had daily limit, () rose by over 5%, and (), () and () rose one after another.

　　At 09:33, the concept of superconductivity rose, () rose by more than 5%, and (), (), () and () followed suit.

　　At 09:35, the pharmaceutical business strengthened in early trading, and the daily limit of Sili Medical went out of four consecutive boards, () rose by more than 4%, and (), () and () followed suit.

　　At 09:37, the concept of diet pills changed, and Shengnuo Bio rose by over 12%, followed by (), (), () and ().

　　09:39 Hua Hong Semiconductor fell 8.10%. According to the announcement, the company’s sales revenue in the second quarter reached 631.4 million US dollars, up 1.7% year-on-year, which was flat from the previous month. The profit attributable to owners of the parent company was $78.5 million, down 6.4% year-on-year, compared with $152.2 million in the last quarter.

　　At 09:41, the tourist plate of scenic spots moved up, () went up, and Emei Mountain A, Zhangjiajie, () and () followed up.

　　At 09:43, the media and game sectors strengthened in intraday trading, () rose by over 6%, () rose by over 5%, and (), () and () followed suit.

　　At 09:45, the gas sector changed and fell, and Chengdu Gas fell by nearly 5%. (), () and Xinao shares fell by more than 4%, and () and () followed suit.

　　At 09:48, Country Garden fell more than 10%. In the news, the company expected a net loss of about 45 billion yuan to 55 billion yuan in the first half of the year, and the company’s management promised to do its best to save itself.

　　At 09:55, the main contract of lithium carbonate hit a new low, reporting 208,400 yuan/ton, down 2.8%.

　　At 10:11, the agricultural sector oscillated lower, () fell by more than 5%, () fell by more than 4%, and (), () and Qiule Seed Industry followed suit.

　　At 10:21, the traditional Chinese medicine sector rose, () rose by more than 7%, and (), (), () and () followed suit.

　　At 10:25, FTSE China A50 index futures fell more than 1%.

　　At 10:32, the concept of reducer was changed and pulled up, () daily limit, (), (), (), () and so on followed up.

　　At 10:33, the Hang Seng Technology Index fell more than 2%, the Hang Seng Index fell 0.7%, and only Alibaba rose among the constituent stocks of the branch index.

　　At 10:41, the securities sector continued to fall, Hongta Securities and Jinlong shares both fell, Capital Securities fell more than 9%, and Cinda Securities and Pacific followed suit.

　　At 10:44, the three major indexes all fell more than 1%, the Shanghai Composite Index fell 1.05%, the Shenzhen Component Index fell 1.13%, the Growth Enterprise Market Index fell 1.03%, and more than 3,700 stocks in the two cities fell. Diet pills and pharmaceutical businesses were among the top gainers, while the securities and gas sectors were among the top losers.

　　At 11:00, FTSE China A50 index futures fell more than 2%.

　　News:

　　1. People’s Daily: Building the communication "base" of digital economy.

　　The People’s Daily published a commentary saying that in order to seize the commanding heights of future development, it is necessary to wait for no one, to make the application of 5G deeper, wider and more refined, and to give birth to more innovations in the format. From the perspective of 5G coverage, it is necessary to continue to consolidate the network foundation, accelerate the construction and deployment of 5G networks and Gigabit optical networks, continuously improve the coverage level of 5G networks in rural and remote areas, and provide better and better telecommunications universal services; From the perspective of the evolution of 5G technology, it is also necessary to accelerate the innovation of core technologies, strengthen the research and development of 5G enhancement technologies, accelerate the development of technologies and industries such as millimeter waves, lightweight modules and high-precision positioning, actively explore the potential key technologies of 6G, and form a number of landmark achievements; From the perspective of empowering the real economy, it is also necessary to deepen the integrated application, accelerate the development and upgrading of "5G+ Industrial Internet", deepen the integrated application in key areas such as mining and electric power, explore innovative applications in potential areas such as agriculture and cultural tourism, and promote the integration of information and communication technologies with the real economy.

　　2. Evergrande Real Estate suffered a net loss of 52.7 billion yuan last year, with current liabilities of 1.6 trillion yuan.

　　On the evening of August 10th, Evergrande Real Estate Group Co., Ltd. issued several reports, including the 2022 annual bond report, the 2022 semi-annual bond report and the 2021 annual bond report, as well as the 2022 and 2021 annual audit reports and the 2022 semi-annual financial report of Evergrande Real Estate. According to the financial report data, the net loss of Evergrande Real Estate in 2022 was RMB 52.72 billion. As of December 31, 2022, the total current liabilities were RMB 1,678.747 billion, while the total monetary funds of the company (including cash and cash equivalents and restricted funds) were RMB 9.173 billion. The company’s total liabilities are 1,833.819 billion yuan and total assets are 1,468.557 billion yuan.

　　3. Country Garden has prepared for debt restructuring and recently started relevant procedures.

　　According to CBN, an institutional source told reporters that Country Garden is already preparing for debt restructuring and is expected to start relevant procedures in the near future. The company has hired CICC as a financial consultant to lead the restructuring.

　　4. CITIC Securities: It is expected that the new shares will be expanded in an orderly manner in the market outlook, and the registration system has limited impact on liquidity.

　　Citic Securities said that looking forward to the market outlook, it is expected that the new shares will be expanded in an orderly manner, and the registration system will have limited impact on liquidity. Liquidity differentiation and delisting normalization will help A-shares achieve survival of the fittest; When new shares return to market pricing, the initial fluctuation of IPO will gradually decrease; The IPO structure will better reflect the development direction of the real economy and the latest supply in the primary market, which will benefit the financing of technology companies such as specialization and innovation; The supply of refinancing projects has increased, and the discount rate of fixed bidding is expected to remain at 10-15%, and the center of fixed pricing discount rate is expected to move up.

　　5. Chengdu Provident Fund may pay the rent directly on a monthly basis.

　　According to the official micro-news released by Chengdu, recently, the Chengdu Housing Provident Fund Management Center issued a notice for public consultation on the "Regulations on the Administration of Direct Monthly Rent Payment from Housing Provident Fund (Draft for Comment)". Among them, it is intended to be clear that if the depositor rents enterprises in the administrative area of Chengdu to centrally operate affordable rental housing that is open to the public, and the operating enterprises have signed a cooperation agreement with Chengdu Provident Fund Center, they can sign the "Chengdu Housing Provident Fund Management Center Extraction Housing Provident Fund Monthly Direct Rent Payment Service Agreement" with Chengdu Provident Fund Center to authorize the monthly direct rent payment business. After the Agreement comes into effect, the depositor authorizes Chengdu Provident Fund Center to automatically transfer the withdrawal amount to the account designated by the operating enterprise on the agreed withdrawal date every month.

　　6. Extreme Krypton car: From now until the end of the year, the limited-time price of Extreme Krypton 001 will drop by up to 37,000 yuan.

　　On August 11th, Extreme Krypton Automobile launched the latest limited-time price rights policy of Extreme Krypton 001. From now until the end of the year, new users can enjoy a limited-time reduction of 30,000-37,000 yuan.

　　China Xintongyuan: In June 2023, the domestic market shipped 22.149 million mobile phones, down 20.9% year-on-year, of which 17.322 million were 5G mobile phones, down 24.8% year-on-year, accounting for 78.2% of the mobile phone shipments in the same period. From January to June, the total shipments of mobile phones in the domestic market totaled 130 million units, down 4.8% year-on-year, among which, the shipments of 5G mobile phones were 102 million units, down 6.4% year-on-year, accounting for 78.9% of the mobile phone shipments in the same period.

　　7. the State Council Security Committee: comprehensively investigate and rectify the hidden dangers of the whole chain of urban gas.

　　The the State Council Municipal Committee of Work Safety issued the "National Work Plan for Special Renovation of Town Gas Safety". It is mentioned in the work plan that it will take about three months to carry out centralized attack, comprehensively investigate and rectify the hidden dangers of the whole chain of urban gas, establish a rectification account, and effectively eliminate the outstanding risks of gas safety in crowded places such as catering enterprises; It will take about half a year to consolidate and improve the effectiveness of concentrated attack, organize a "look back", comprehensively complete the rectification of identified risk hazards, and build a dual prevention mechanism for gas risk management and control and hidden danger investigation and management; By the end of 2025, establish a gas safety management mechanism that is strict, strict and severely punished, improve the relevant laws and regulations and standards system, enhance the level of intrinsic safety, lay a solid foundation for gas safety management, and basically establish a long-term mechanism for gas safety management.

　　8. Yang Huiyan withdrew from the chairman of a company under Country Garden.

　　Enterprise search APP shows that recently, the industrial and commercial changes occurred in Country Garden Real Estate Development Co., Ltd. in Gaoming District, Foshan City, and Yang Huiyan stepped down as the chairman; Bu Dehua no longer serves as general manager and director, and Yu Peiling no longer serves as supervisor; Li Shihua’s position was changed from deputy general manager and director to manager. Foshan Gaoming Country Garden Real Estate Development Co., Ltd. was established in January 2004 with a registered capital of 1.163 billion yuan, which is wholly owned by ANGEL VIEW INTERNATIONNAL LIMITED. Enterprise investigation shows that Yang Huiyan has stepped down as the chairman of Zengcheng Country Garden Property Development Co., Ltd..

　　　　In June 2010, Jobs released the classic 4. This generation of iPhone is still three years away from fingerprint recognition, and only three months later, Apple acquired a Swedish company called Polar Rose, which is a small company with only 15 people. Is it anything else that Apple is interested in? It is Polar Rose’s unique face recognition technology. That’s right, this is the predecessor of the Face ID that was carried on the internet seven years later.

Seven years of hard work, iPhone X facial recognition, past lives

　　　　　It is hard to imagine that in 2010, before fingerprint recognition was born, Apple began to lay out 3D vision, and after 7 years of dormancy, it first appeared in the form of facial recognition. So when there is talk that Face ID is just a substitute for the iPhone to solve the fingerprint on the screen in a hurry, we have to admit that we underestimate the Apple Empire.

　　　　Polar Rose’s main technology is to use artificial intelligence to engage in image and video analysis and extract three-dimensional information from two-dimensional images, but Apple’s layout in 3D vision is still one step behind Microsoft’s. Because as early as the E3 exhibition in June 2009, Microsoft officially released Kinect, a somatosensory game device, which changed the way people interact with games. We can play games by shaking our bodies (Nintendo’s Wii still needed a remote control stick).

Kinect somatosensory game (picture quoted from gamefy)

　　　　　And even the key here is the depth camera, which is used to capture human body movements and then hand them over to the program to identify, remember, analyze and process these movements. This technology is called PrimeSense by a company.Provided by the company.　　　

　　　　　　PrimeSense is an Israeli company founded in 2005, and developed a 3D sensor in 2006. Its founders all have strong scientific research background. At that time, the game industry had been stagnant, and they have been thinking about how to make changes, such as letting people pick up the sword in the game instead of the remote control handle. Finally,PrimeSense locked the camera.

Kinect(Image quoted from cnblogs)

　　　　　At the game developers’ conference that year,PrimeSense showed the prospect of 3D sensors in the game field, and was recognized by Microsoft, which gave birth to the later.Kinect。

3D recognition of the originator’s structural light to achieve PrimeSense

　　　　PrimeSense3D recognition technology is mainly a kind of structured light--—Light Coding (optical coding technology), we know that the camera wants to capture human movements, and it needs to be realized by judging the depth of field. Structured light is to structure light, and its principle is to use a projector to project a grating or a linear light source onto the measured object, forming a distorted shape on the surface of the measured object, such as the bar grating in the picture below, which projects irregular lines on the surface of the fish.

Principle of structured light technology

　　　　Such a distorted image is captured by a camera in another position, and the lines seen from its angle are obtained. When the positions of the projector and the camera are fixed, the distortion degree of the lines captured by it is also consistent, so that the distorted two-dimensional image can restore the three-dimensional imaging of the object surface. Here, the principle of optical triangulation is mainly used.

Principle of structured light technology

Principle of structured light technology

　　　　The Light Coding used by PrimeSense is somewhat different. It will emit a light source called "laser speckle" in space. This light source is characterized by high randomness, and different patterns will appear with different distances, so that the speckles in different spaces are the same. After the light source is emitted, it is equivalent to that the whole space has been marked. When an object is placed in this space, the spatial position of the object can be monitored through the change of speckle.

　　　　　PrimeSense will record a speckle pattern on the reference plane at intervals in space to form a three-dimensional speckle pattern group. When someone enters the space, it will record it again to form a contrast and correlation operation, and then a three-dimensional image of the whole scene can be obtained. This principle is used by Microsoft’s first generation Kinect depth-of-field image.

　　　　Since 2009, technology companies have discovered that 3D vision is a huge treasure that has not yet been tapped, including Microsoft, Intel, Google, Samsung and other companies that have invested in the development of 3D vision through acquisitions and independent research and development. In 2009 and 2010, Microsoft acquired 3D-TOF camera companies canesta and 3dv. In 2013, Intel launched RealSense technology and Google launched Tango project.

　　　　At this point, we haven’t seen much of Apple’s shadow, but since Microsoft announced its parting ways with PrimeSense, Apple has just appeared.

Microsoft’s self-developed TOF Apple Leaks Achievement Face ID

　　　　　In 2013, a new generation of Kinect came out. Instead of continuing to use PrimeSense, it chose to independently develop 3D sensors. In fact, the second generation of Kinect adopts a 3D vision technology-TOF, which is completely different from PrimeSense structured light. These technologies are accumulated from the previously acquired companies canesta and 3dv, which hold the patent of TOF camera. Previously, it was always thought that the first generation of Kinect used TOF technology.

TOF 3D vision (picture quoted from China Electronic Network)

　　　　TOF is short for Time of flight. It is to send light pulses to the target continuously, and then receive the light from the object with a sensor. By detecting the flight (round-trip) time of the light pulses, the distance between the target and the object can be obtained. Usually, the LED emits infrared rays, the imaging sensor receives infrared rays reflected from the surface of the object, and the device emits a sinusoidal signal whose intensity changes with time period, and the depth is calculated by obtaining the phase difference between the transmitted and received signals.

TOF technology principle

　　　　　In addition to structured light and TOF technology, there is also a binocular stereo imaging technology, but it will not be introduced here because the technology is immature.

　　　　　Both structured light and TOF technology have their own advantages in 3D vision. For example, structured light has mature technology, low power consumption and high resolution of plane information, but it is easily affected by illumination, and its performance in strong light is not very good, and its recognition distance is close, but its cost is high. TOF scheme has good anti-interference and long recognition distance, but it has low plane resolution, high power consumption and medium material cost.

Comparison of three 3D vision technologies (picture quoted from Haitong Electronics Research)

　　　　In any case, Microsoft gave up using structured light technology.PrimeSense，Although PrimeSense was somewhat disappointed, it didn’t stop the pace of research and development, and decided to reinvent itself, and developed a very small 3D sensor in the world.CApri and Capri have three times the depth resolution and 50 times the light resistance (enabling them to work in sunlight), but their bodies are reduced by 10 times.

　　　　Maybe it isPrimeSense’s efforts in product miniaturization have enabled 3D sensors to be used in notebooks, tablets and even computers, and also allowed Apple to see its potential. Microsoft is right.The abandonment of PrimeSense finally made Apple miss it..

　　　　　So, finally, in September 2013, Apple officially made its debut and spent $360 million to acquire PrimeSense, which enabled this ambitious company to master the core 3D vision technology.

Those invisible ones behind Face ID are bought in buy buy.

　　　　　Apple’s acquisition of PrimeSense is still advancing the miniaturization of 3D sensors, and increasing investment and patent layout. In April 2015, Apple submitted a patent application for 3D gesture control technology; In July 2015, Apple submitted a facial recognition patent named "Low Threshold Facial Recognition". In March 2017, Apple released a new patent for 3D vision-face recognition using depth of field information, and a complete patent map of face recognition gradually became clear.

　　　　　Then there is a series of crazy acquisitions:

　　　　　In April 2015, Apple acquired LinX Imaging.

　　　　　　　　　　LinX Imaging mainly develops multi-hole cameras for mobile devices, which can reduce the height of the camera and make the camera no longer protrude. Another black technology is to use porous design to accurately measure the difference between pixels in different images, so as to create a depth-of-field image, which allows us to scan the object in three dimensions only by taking pictures.

LinX Imaging 3D scanning technology

　　　　　In November 2015, Apple acquired Faceshift.

　　　　　Faceshift is a motion capture company, which developed the technology of tracking facial expressions in real time and then using animation. This technology was used in Star Wars movies to make the expressions of animated characters imitate the expressions of actors more accurately. In the field of games, users can use avatars that are updated in real time according to their own expressions.　　　

Faceshift expression capture

　　　　　It turned out later that,Faceshift is not only used asIn addition to face recognition, it is also used by Apple in Animoji.

　　　　　In January 2016, Apple acquired Emotient.

　　　　Emotient is a company dedicated to judging people’s emotions through facial expression analysis. This technology will grab people’s faces and then use recognition technology to identify facial expressions.

Perceive facial emotions

　　　　In February 2017, Apple acquired RealFace.

　　　　　RealFace is good at facial recognition. The company has developed a unique facial recognition technology, which integrates artificial intelligence and brings human perception back to the digital process.

RealFace face recognition

　　　　　　　　The large-scale acquisition enabled Apple to quickly master the core technology of 3D vision, especially in the field of face recognition, and also prevented competitors from catching up with Apple quickly through acquisition, so at the new product launch conference in the fall of 2017, X with Face ID function made a stunning debut.

IPhone X facial recognition

The real essence: a quick glance

　　　　　According to Apple’s perfectionist product design concept, X’s "Liu Haier" should not exist, but Jonathan Ive is still willing to make way for "small space", because he also knows that it is not just a full screen on the front that really builds Apple’s next decade, but more importantly, the stunning "that light glance".

　　　　"All along, we have an idea, looking forward to creating such an iPhone: it has a full screen, which allows you to completely immerse yourself in it when using it, as if forgetting its existence. It is so smart, your touch, touch, word, word, even a glance, will get its heart-felt response. And this idea has finally become a reality with the arrival of iPhone X. Now, just meet the future. "

Little space

　　　　Looking back, "Small Space" is highly integrated with Apple’s research results in face recognition, in which the dot matrix projector will project more than 30,000 invisible light spots and analyze them to draw accurate and detailed depth maps for our faces. The infrared lens will read the lattice pattern, capture its infrared image, and then send the data to the security compartment in A11 Bionics chip to confirm whether it matches, using the structured light technology of PrimeSense. In addition, Apple can recognize your face even in the dark through the floodlight sensor and invisible infrared light.

　　　　　Apple chosePrimeSense’s structured light, rather than TOF, pays more attention to the proper recognition distance and high resolution of structured light. Compared with TOF, the lower power consumption also makes structured light more suitable for mobile platforms. However, structured light has a natural disadvantage in strong light. I don’t know if iPhone X can still perform well in the big sun.

　　　　　It is worth mentioning that Face ID is only a part of the energy released by Apple’s accumulated 3D vision for 7 years. In addition to unlocking the face on iPhone X, it also creates a series of functions that seem to show muscles but are very interesting, such as "moving expressions".

　　　　Through the complex system of the original deep camera, iPhone X can analyze more than 50 different facial muscle movements to detect facial 3D contours. On this basis, the "dynamic expression" is derived, that is, the user’s face is captured in 3D modeling. The special effects we often see in movies belong to this category, but this time we can achieve them through mobile phones.

Verbal expression

　　　　Combined with A11 bionic deep learning, Face ID also has the ability of deep learning. It has a special neuron engine, which can use machine learning technology to identify the changes of your appearance. Recently, the white paper on Face ID disclosed by Apple revealed that if your face changes greatly, such as shaving, Face ID will confirm the facial changes through password input and automatically record them in the database, instead of letting you re-enter your face.

Face ID, a small test, Apple’s 3D big move is AR.

　　　　Through patents, we can see that Apple has also reserved a series of 3D gesture operation technologies. Today, when the somatosensory operation has been tepid, we are very happy to see that the future somatosensory operation still needs Apple, a "latecomer", to subvert, and this is the real use of 3D vision.　　　　　

　　　　The 3D gesture operation may be realized on the Mac platform, and the Face ID on the mobile platform is just a small test of 3D vision. Apple said that AR will be an indispensable link in the future, and the energy exerted by the rear dual camera to join 3D vision can not be underestimated.

　AR game

　　　　　At present, Apple has released ARKit development platform, and it has become a huge AR development platform in one fell swoop. However, the AR experience of X is still based on traditional cameras, which is far from 3D cameras. Therefore, when Cook enthusiastically introduced the AR function of iPhone at the press conference, he not only gave the expectation for the next decade, but also had already targeted your wallet for the next decade.

　　　　　　　　The above is a report on the evaluation of Apple’s iPhone products. For the follow-up content of Apple’s iPhone, such as its appearance, screen, photos, battery life and performance, please continue to pay attention to Zhongguancun Online’s report on the evaluation of Apple’s iPhone.

　　Bananas have different maturity and different health effects on human body. The Japanese beauty and health network "Beauty Ranger" introduced this.

　　Green banana loses weight.Professor Yo Kato Zhi of Hirosaki University found that immature green banana is rich in "indigestible starch" and its glycemic index is lower. In other words, the greener the banana, the lower the calorie intake, which is more beneficial to weight control.

　　Yellow banana beauty.People who want to beautify their skin are recommended to eat bananas with yellow skin. Bananas of this color are ripe and contain more vitamin B2 and vitamin B6, which has a good effect on preventing and treating skin problems. Professor Okubo Yiliang of Tohoku University found that yellow banana has a strong antioxidant effect, which can effectively remove free radicals from the human body, thus achieving a cosmetic effect.

　　Bananas with brown skin help digestion.Ripe bananas often have black spots or brownish skin. Studies show that this kind of brown banana contains phospholipids that are rare in fruits and has the effect of inhibiting gastric ulcer. Therefore, people who usually have a bad appetite may wish to eat brown bananas to help digestion. ▲ (Life Times special correspondent Yao Lijie)

　　Xinhua News Agency, Washington, January 21st(International observation) The candidates for Biden’s government team are meaningful.

　　Xinhua News Agency reporter Sun Ding Xu Jianmei Deng Xianlai

　　After US President Joe Biden officially took office on the 20th, he has introduced a number of administrative measures, including the return of the United States to the Paris Agreement on climate change. The Senate controlled by his Democratic Party is also actively promoting the confirmation process required for relevant cabinet members before taking office.

　　The United States, which Biden inherited, is deeply mired in multiple crises: there are more than 400,000 deaths in COVID-19, unprecedented political tears, weak economic employment and high debt risk. In this context, it is particularly important for the president to be in power. Some analysts pointed out that the main features of Biden’s cabinet nomination are the activation of "Washington Old Man" in order to ensure the rapid operation of the government, the diversification of personnel background in order to achieve political unity, and the reward for running for "hero".

　　Who is in love?

　　In addition to the vice president, the US cabinet also includes 15 heads of administrative departments, including the Secretary of State, the Minister of Finance, the Minister of Defense and the Minister of Justice. In addition, the White House Chief of Staff, Assistant to the President for National Security Affairs, Director of National Intelligence, US Trade Representative and other important positions have cabinet level. Biden completed the nomination or direct appointment of all cabinet and cabinet-level officials before taking office, and the Senate is now beginning to review and vote on the nominees who need to be approved by him. On the 20th, the Senate approved Averil Haynes as the Director of National Intelligence, the first cabinet-level official in Biden’s administration confirmed by the Senate.

　　Biden’s important cabinet nominations include: former Deputy Secretary of State Anthony Blinken as Secretary of State, former Federal Reserve Chairman janet yellen as Treasury Secretary, retired four-star general lloyd austin as Defense Secretary, and Chief Justice merrick Garland as Attorney General. These four positions are traditionally called the "four big members" of the cabinet and have higher importance and exposure.

　　Among several cabinet-level positions concerned by the outside world, Biden appointed Ron Klein, who had served as his campaign adviser, as the White House chief of staff; Jack sullivan, the vice president’s national security adviser when he was the vice president of the Obama administration, was appointed as the president’s national security assistant; Nominated Qi Dai, chief trade adviser of the House of Representatives Ways and Means Committee, as the US trade representative.

　　In addition, Biden also made some "addition and subtraction" for cabinet-level positions. For example, he established the post of presidential special envoy on climate issues and appointed former Secretary of State John Kerry as the post, and re-promoted the permanent representative of the United States to the United Nations to the cabinet level, but the director of the Central Intelligence Agency no longer held the cabinet level.

　　Quite purposeful

　　Some analysts pointed out that many of Biden’s cabinet members were senior officials during the administration of former President Obama, and some even served as the top or second-in-command of federal government agencies. The editorial of USA Today said that many of Biden’s cabinet members are "old rivers and lakes" in Washington. They have rich policy experience and are familiar with the operation of the federal government. The United States is now facing multiple problems, and federal government agencies need these "skilled hands" to take over to bring more stability.

　　At the same time, it is noteworthy that Biden’s cabinet candidates also paid attention to balancing gender, race and other factors, and did not forget to support the younger generation and reward the "heroes" in the election. If all the candidates are successfully approved by the Senate, a series of firsts will be created: the first aboriginal cabinet minister, the first female finance minister, the first African-American defense minister, the first Hispanic health and human services minister, the first immigrant-born homeland security minister, and the first Asian-American trade representative. It is worth mentioning that Kamala Harris has made history as the first female vice president of the United States.

　　Biden also nominated Pete Buttigieg, former mayor of South Bend, Indiana and former Democratic presidential candidate, as the transportation secretary. American media believe that 39-year-old Buttigieg is one of the new political stars of the Democratic Party, and it is only a matter of time before he runs for the presidency again. Biden intends to help him "brush up his resume".

　　In addition, almost all the "heroes" of Biden’s campaign team were entrusted with important positions, which is also the usual practice for the new president to select and employ people.

　　Face obstacles

　　At present, the Democratic Party and the Republican Party each hold 50 seats in the Senate, and the Vice President, as the Speaker of the Senate, holds the decisive vote. This means that, not surprisingly, Biden’s cabinet nomination will be passed more smoothly in the Senate.

　　However, some analysts pointed out that the situation is slightly complicated. At present, the Senate should not only begin to hear the impeachment case against former President Trump after he leaves office, but also consider a new round of economic aid plan for the COVID-19 epidemic. These time-consuming and labor-intensive agendas may affect the progress of the Senate’s deliberation and approval of cabinet nominations.

　　The US "Political News" published an article saying that considering the partisan disputes caused by the impeachment case, it is not easy for Biden’s cabinet candidates to get approval quickly. Biden expressed concern about this and called on the Senate to "work in parallel", with half a day being devoted to hearing impeachment cases, and the other half being devoted to reviewing and approving cabinet members and promoting a new round of economic aid plan for the COVID-19 epidemic.

　　At present, Biden has appointed a series of acting officials to temporarily take charge of important federal government agencies until the Senate approves the official candidates, so as to try to ensure the normal operation of government departments during the transition period.

Recently, I received many calls from parents of students asking about the pronunciation of the Chinese pinyin "O". Students and parents have different opinions on this, including "nest", "oh" and "oh".

After understanding, it is found that many parents will learn pinyin in advance through extracurricular training courses and online courses before their children enter school, in order to reduce the pressure on their children to learn Chinese pinyin. However, the professional level of teachers in these institutions and platforms is uneven, so it is difficult to guarantee the teaching quality. In fact, as a section of Chinese teaching, Chinese Pinyin is not paid as much attention as other sections, such as literacy, writing, reading and writing. Therefore, whether it is teaching seminars or training lectures, there is very little content about Chinese Pinyin, and even professional teachers have little chance to get relevant knowledge training. The pronunciation of "O" is a difficult point in pinyin teaching, because only modal particles such as "Oh" and "Oh" are close to the pronunciation of "O", and modal particles make different sounds because of the speaker’s different emotions and mouth sizes, so it is difficult to pronounce the sound of "O" accurately.

In pinyin teaching, the Chinese Pinyin Scheme is the basis and the curriculum standard is the program. The Ministry of Education once replied in official website that the "O" in Chinese Pinyin should be pronounced "Oh". There are 63 hanyu pinyin, including 6 single vowels. The pronunciation of monosyllabic vowels is characterized by loud voice, good mouth shape when pronouncing, and the mouth shape and tongue position remain unchanged. As one of the monosyllabic vowels, the letter "O" is a round lip sound. In addition to the pronunciation characteristics of monosyllabic vowels, the upper and lower lips are naturally rounded, the back of the tongue is contracted, and the back of the tongue is raised.

The above is a professional way to explain the pronunciation of the Chinese phonetic alphabet "O". In teaching, of course, we can’t explain academic terms and theoretical knowledge to students stiffly. We should learn the pronunciation of letters by teachers’ demonstration and students’ observation of teachers’ mouth shapes. There is another relatively simple and easy-to-learn method: pronounce a "bo" sound first, the sound is prolonged, the mouth shape remains unchanged, and the rest of the sound is "O". By analogy, syllables such as "Po", "Mo", "Fo" and "Wo" are pronounced with a continuous sound length, and the rest of the sounds are also the letter "O". In teaching practice, if it is difficult for students to pronounce the letter "O" correctly, there is no need to force it too much, because when they form syllables with other letters, it does not affect the overall pronunciation of syllables.

Facing the first-grade pupils, pinyin teaching is rich, vivid and intuitive, which can better protect children’s thirst for knowledge in learning Chinese, guide them to acquire new knowledge in interesting games and specific situations, and improve their literacy. In teaching, we can fully tap the resources of teaching materials and develop children’s language and thinking while teaching Chinese Pinyin. In the pinyin teaching part of the textbook, there are a large number of theme maps, which integrate the sound and shape of letters with the specific situations in life, making the originally boring letters become familiar, sensible and meaningful things. In teaching, teachers help students to pronounce correctly, master the shape characteristics of letters and reduce the difficulty of memorizing them by guiding them to practice reasonably in imagination and speaking.

In teaching practice, according to the provisions of Chinese Curriculum Standard for Compulsory Education (2021 Edition), students "can read Chinese characters by using Chinese Pinyin, and learn to look them up in the dictionary by using phonetic order retrieval method and radical retrieval method", which emphasizes the instrumentality of Pinyin learning. The current unified Chinese textbook has also greatly reformed the teaching content of the first volume of grade one, delaying the learning content of pinyin, recognizing and writing some commonly used Chinese characters first, and then learning Chinese pinyin. At the same time, in pinyin teaching, the learning task of word recognition is properly arranged, and word recognition and learning pinyin are integrated with each other. This can make children’s "first impression" of Chinese not letters.ɑO, e ",but the Chinese character" heaven, earth and man ". This adjustment in the order of teaching content is to put Chinese and Chinese characters back to the first place, and Pinyin is only a tool to assist in learning Chinese characters, not an end.

When guiding children to learn Chinese Pinyin, we should accurately grasp the purpose of learning Chinese Pinyin, give full play to the auxiliary role of Chinese Pinyin in literacy and expression, cut unnecessary cumbersome links, create a relaxed, pleasant and diverse learning atmosphere for children’s Chinese learning, and make classroom teaching really reduce burdens and increase efficiency.

??(Author: Miao Yue, a Chinese teacher at Nanjie Primary School in Linfen City, Shanxi Province)

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