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

(October 27th, 2016, Cupertino, California)-Apple today launched the slimmest and lightest MacBook Pro? to date, and brought innovative interface design. A colorful multi-touch display panel with Retina? quality replaced the function keys on the previous keyboard, which is the brand-new Multi-Touch Bar?. The new generation MacBook Pro is equipped with Apple’s brightest and most colorful Retina display, a safe and convenient Touch ID?, a more responsive keyboard, a larger Force Touch trackpad, and an audio system with double dynamic range. It is also the most powerful MacBook Pro ever: it uses the sixth-generation quad-core and dual-core processors, and its graphics processing performance is up to 2.3 times that of the previous model, and it has an extremely high-speed solid-state drive and up to four Thunderbolt 3 ports.
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The Multi-Touch Bar makes all kinds of control options at your fingertips, and can adjust the displayed options according to the usage scenarios when users use the system or email, Finder?, Calendar, Numbers?, GarageBand?, Final Cut Pro? X and other third-party apps. For example, the Multi-Touch Bar can display tabs and personal favorites when using Safari?, make it easy for users to access emoticons when using information apps, and provide an easy way to edit photos or slide through videos when using photo apps.
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"This week marks the 25th anniversary of the birth of Apple’s first laptop; Over the years, each generation of our laptops has brought innovative technologies and functions to people, and this new generation of MacBook Pro is our biggest leap to date. " Philip Schiller, Apple’s senior vice president of global marketing, said, "The groundbreaking new Multi-Touch Bar, convenient Touch ID, the best Mac display so far, powerful performance, better audio system, fast storage device and Thunderbolt 3 connection system are integrated into such a slim and lightweight body, making the new generation MacBook Pro our most advanced notebook computer so far."
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The thinnest and lightest MacBook Pro to date.
Based on the groundbreaking MacBook, the new generation MacBook Pro adopts a brand-new body design and all-metal integrated structure, which makes this notebook computer not only extremely sturdy, but also extremely slim and lightweight. The 13-inch MacBook Pro is as thin as 14.9 mm, 17% thinner than the previous model, 23% smaller, and nearly half a catty lighter, weighing only 1.37 kg. The new generation of 15-inch MacBook Pro is as thin as 15.5 mm, 14% thinner than the previous model, 20% smaller, and nearly half a catty lighter, weighing only 1.83 kg.
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Touch ID login Mac
The new generation of MacBook Pro integrates an excellent function that people are familiar with and love on iPhone? and iPad? in the power button, that is, the safe and convenient Touch ID. Now, as long as you enter your fingerprint in the Touch ID on the MacBook Pro, you can quickly unlock and switch users with a touch of your fingertips. Touch ID can read your fingerprint quickly and accurately, and use complex and advanced algorithms to identify the fingerprint, and then match it with the Secure Element in the new Apple T1 chip.
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Apple’s brightest and most colorful notebook display to date.
This time, we brought the best Mac display screen so far, presenting more vivid images, richer details and more realistic pictures. The Retina display of the new generation MacBook Pro is only 0.88 mm thick, which is as slim as the MacBook display, but its brightness reaches 500 nits, which is 67% higher than that of the previous generation, and the contrast is also improved by 67%. Moreover, it is the first Mac notebook display that supports a wide color gamut. In addition, due to the adoption of various energy-saving technologies, such as larger pixel aperture, variable refresh rate and more efficient and energy-saving LED, the energy consumption of this display screen is reduced by as much as 30%.
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The most powerful MacBook Pro to date
Thanks to powerful processors, excellent graphics processors, fast solid-state drives, high-speed memory and advanced heat dissipation architecture, we have achieved amazing professional performance in a slimmer body than ever before. The 6th generation dual-core Intel Core i5 processor with eDRAM, dual-core Intel Core i7 processor with eDRAM, and quad-core Intel Core i7 processor can bring professional processing performance and save energy consumption. The new generation of 15-inch MacBook Pro is equipped with a powerful Radeon Pro independent graphics processor, and its graphics processing speed can reach up to 2.3 times that of the previous model; The 13-inch MacBook Pro is equipped with an Intel Iris Graphics graphics processor, which can process graphics at twice the speed as before. All models are equipped with solid-state hard disks with sequential reading speed exceeding 3Gbps, and Thunderbolt 3 port, which integrates data transmission, charging function and double video bandwidth, so that users can drive 5K display screen with only one cable and charge MacBook Pro.
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The new MacBook Pro is also equipped with:

• Force Touch trackpad with significantly increased size: 46% larger than before on the 13-inch MacBook Pro and twice as large as before on the 15-inch MacBook Pro;
• The keyboard with the second-generation butterfly structure brings fast response speed and comfortable input experience;
• Louder and more realistic sound quality is brought by speakers with double dynamic range and enhanced bass;
• MacOS? Sierra, an advanced computer operating system, brings many new functions, such as Siri? integration, universal clipboard and so on, as well as excellent photo app to help you regain meaningful memories, organize your photo gallery and beautify your photos like a professional.

Price and release time

• The 13-inch MacBook Pro is equipped with a 2.0 GHz dual-core Intel Core i5 processor (Turbo Boost up to 3.1 GHz), 8GB of memory and 256GB of flash memory. The starting price is RMB 11,488, and delivery will begin on the same day.
• The 13-inch MacBook Pro is equipped with groundbreaking Multi-Touch Bar and Touch ID, 2.9 GHz dual-core Intel Core i5 processor (Turbo Boost up to 3.3 GHz), 8GB of memory and 256GB of flash memory. The starting price is RMB 13,888, and it will be shipped in two to three weeks.
• The 15-inch MacBook Pro is equipped with groundbreaking Multi-Touch Bar and Touch ID, 2.6 GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.5 GHz), 16GB of memory and 256GB of flash memory. The starting price is RMB 18,488, and it will be shipped in two to three weeks.
• For information about other technical specifications, make-to-order configuration options and accessories, please visit apple.com/cn/macbook-pro..

Apple introduced Macintosh in 1984, which brought great changes to personal technology. Today, Apple leads global innovation with iPhone, iPad, Mac, Apple Watch and Apple TV. Apple’s four software platforms, iOS, macOS, watchOS and tvOS, bring a smooth experience between all Apple devices, and at the same time give people greater capabilities with breakthrough services such as App Store, Apple Music, Apple Pay and iCloud. Apple’s 100,000 employees are committed to building the world’s top products and making the world a better place.

　　　　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.

　　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.

On November 9th, Auto announced that its global users will reach 500,000, and at the same time, it will be the fourth anniversary of its launch. For this reason, Euler Auto launched the "Euler Good Cat Anniversary Edition", with a guide price of 129,800 yuan and a limited sales of 520 units.

The design and configuration of the anniversary edition of Euler Good Cat have been adjusted a number of times. The body color is "Sailimu Lake Blue" and the roof is matched with "Siam Black". In addition, the model is also equipped with a "Shadow Elf" appearance kit, including a black front fog light area decorative cover, a black exterior rearview mirror, a black headlight decorative cover and a yellow brake caliper.

In terms of technology, according to the introduction of car companies, the new car "Sailimu Lake Blue" car paint adopts an eight-coating process, which can automatically repair tiny scratches, effectively filter ultraviolet rays and slow down the aging and fading speed of car paint. In terms of interior, the Euler Good Cat Anniversary Edition adopts a green and gray contrast design.

According to statistics, during the four years since its listing, Euler Good Cat has entered the markets of 50 countries and regions, and the global cumulative sales volume has exceeded 260,000, and Euler Auto will continuously optimize its products according to users’ opinions and suggestions. Car companies have launched the "Good Cat Co-creation Officer" program before, and users not only have the opportunity to participate in the co-creation activities of modification and peripheral products, but also can integrate personal suggestions and ideas into the research and development of new cars. This model enables Euler Auto to establish closer contact with users and jointly promote product improvement and innovation.

I still remember that in August 2023, Euler Auto launched the 2023 Euler Good Cat and Good Cat GT Honorable Model. It is reported that these two models were also born on the basis of deep creation with users. The anniversary edition of Euler Good Cat released this time, the company introduced that it is also another product jointly created by Euler Auto and users. Euler Good Cat said: Success is inseparable from users. In the process of interaction with users, brand loyalty has been enhanced, and it has also brought impetus to continuous innovation and improvement of products.

In terms of marketing, Euler Auto told the media that it interacts with users through online and offline channels. Online, Euler Auto uses social media platforms and official websites to publish product information, user stories and interactive activities to enhance user stickiness; Offline, Euler Auto allows users to experience the products by holding test drive activities, auto shows and user meetings.

In terms of intelligence, Euler Good Cat is equipped with intelligent driving assistance system and intelligent interconnection function to provide a safer and more convenient driving experience. At the same time, Euler Auto is constantly exploring new intelligent technologies and upgrading them to enhance the demand for intelligent travel.

Facing the future, Euler Auto also said that it will continue to focus on users and increase R&D investment in new energy, intelligence and networking. At the same time, it will actively expand the international market and promote the global development of brands.

In addition, Euler Auto also said that it will be committed to promoting the popularization of green travel and low-carbon lifestyle, and reducing the energy consumption and emissions of vehicles through technological innovation and product optimization. At the same time, he said that he would actively participate in social welfare activities, give back to the society and show the sense of social responsibility of enterprises.

Written at the end, the anniversary edition of Euler Good Cat is not only a celebration for nearly 500,000 global users, but also a manifestation of co-creation with users. While enhancing brand power and product power, Euler Automobile promotes innovation and development, and promotes intelligent development and green travel popularization.

　　Brand-new 22 parallel imported Escalade diesel version 3.5T is on the market, attracting many bosses with more domineering appearance, luxurious interior, wide space and fuel economy.

　　The new 22 parallel imported Cadillac Escalade diesel version has a body size of 5766mm*2059mm*1942mm and a wheelbase of 3407mm. 22-inch rims are standard, and the tire size is 275/50R22. The new exterior contour inherits the imposing details of the old model, and has been finely adjusted. It adopts all-aluminum body, with girders, four-wheel independent suspension, full-time four-wheel drive with two-wheel drive mode, and American models are also intimate to the extreme. In addition to lightning detection, night vision function is added to the active safety, and multi-spoke polished and electroplated wheels in the sports matrix are elegant.

　　In terms of the new 22 parallel imported Cadillac Escalade diesel version 3.5T interior, the new car also adopts a new design style, while three LCD screen highlights, the 7.2-inch screen on the left can display information such as fuel consumption, the 14.2-inch full LCD instrument panel in the middle and the 16.9-inch central control panel on the right. In addition, the rear of the high-profile car is equipped with two 12.6-inch touch entertainment screens. Cadillac’s new Escalade is equipped with a high-tech OLED curved touch screen, which eliminates the barrier and highlights the luxurious atmosphere and strong sense of technology inside the car. The prominent details of seats and instruments are improved.

　　The brand-new 22 parallel imported Cadillac Escalade diesel version 3.5T adopts the design style of large screen cover and small screen, and the total screen size exceeds 38 inches. In addition, the rear of the high-profile car is equipped with two 12.6-inch touch entertainment screens. This new car offers a 7-seat version of 2+2+3, and an 8-seat version of 2+3+3 to choose from. The electric folding third row seat space giant, the seating space is better than MPV under full load, with electric pedal and wide aisle blessing, getting on and off more calmly, and the second and third rows can be flat.

　　The brand-new 22 parallel imported Cadillac Escalade diesel version 3.5T seats are made of semi-benzamine leather, diamond-shaped perforated, ventilated, heated and massaged, and there are separate speakers on the headrest. The whole car has a total of 36 speakers, which is also the most mass-produced car, using AKG speakers.

　　The brand-new 22 parallel imported Cadillac Escalade diesel version 3.5T It is worth noting that the new electromagnetic suspension is adjusted 1000 times per second, and a set of air suspension is added. The double suspension is the first real number in the world, which also determines the unparalleled comfort.

　　In terms of the new 22 parallel imported Cadillac Escalade diesel version 3.5T rear end, it is expected that the penetrating decorative strip under the rear door glass will also be changed from chrome-plated luxury version to bright black decorative strip, and the taillights will have blackening effect. At the same time, it can be seen that the new car adopts a bilateral four-outlet exhaust layout with more outstanding performance elements, which is obviously different from the ordinary version of the bilateral double-outlet layout.

　　Name of Dealer: Head Office of Tianjin Hengtai Zhicheng Automobile Trading Co., Ltd.

　　Dealer address: No.43, Haibin Fifth Road, Bonded Zone, Binhai New Area, Tianjin

　　Dealer Tel: Manager Yu 1592224890 (same as WeChat) and Manager Zhu 17152250666 (same as WeChat)

　　Disclaimer: The above car purchase preferential information is provided by the comprehensive dealers of this website, and the price fluctuates greatly due to market factors, which is only for car purchase reference; The distributor is responsible for its authenticity, accuracy and legality, and this website does not provide any guarantee or assume any legal responsibility.

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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