分类归档 khj

　　With the development of Internet and information technology, the Internet platform has become the main carrier for the whole society to obtain information, establish contacts, inherit civilization, entertain and relax, and the construction of network civilization is in the ascendant. In the process of network civilization construction and development, algorithm technology has brought great convenience to Internet users, but at the same time, its bias and abuse have also aroused people’s doubts, which has also become an important topic in network civilization construction. How to promote the comprehensive governance of algorithm technology through optimizing algorithm ethics and empower and help build an upward-oriented network civilization? On November 19th, the Convention on Self-discipline in the Application of Internet Information Service Algorithms, initiated by China Network Social Organization Federation at the first China Network Civilization Conference, provided a very useful exploration for solving this problem.

　　First, the algorithm and algorithm ethics

　　Algorithm refers to the accurate and complete description of the solution, and it is a series of clear instructions to solve the problem. Algorithm represents a systematic method to describe the strategic mechanism to solve the problem. At present, the deep development of Internet technology and artificial intelligence is promoting the wide application of algorithm technology. Technology is a "double-edged sword". While the algorithm is widely used, it brings a lot of convenience to the society, it also causes ethical problems of the algorithm, which brings new challenges to the current construction of Internet civilization.

　　Anderson proposed in Dependent Code: Advantages and Disadvantages of Algorithm Age that algorithms can really help us to process a large amount of data, which will bring many visible and invisible benefits, such as stimulating scientific breakthroughs, improving people’s creativity and self-expression ability, and creating new and convenient lifestyles. But at the same time, these benefits of the algorithm are accompanied by many challenges, such as too much pursuit of data and modeling, which will have various adverse consequences such as weakening human judgment, forming algorithm bias and deepening social differences.

　　Therefore, it is extremely important to regulate the use of algorithms from the perspective of algorithm ethics. Algorithm ethics is based on the unpredictability of algorithm consequences and the value load of the algorithm, with respect, safety, prevention, transparency and friendliness as its basic criteria, and with cultivating the moral imagination of the algorithm design subject and following the value sensitivity as its approach.

　　Second, face up to correcting the ethical anomie of algorithms and improve the civilized governance of cyberspace.

　　Network civilization refers to a new form of civilization with the application of information network technology, which has a very wide meaning, mainly including three levels: network technology civilization, network spiritual civilization and network system standardization civilization. The purpose of network civilization construction is to create a healthy, orderly, safe, dynamic and pollution-free "green" network environment. Algorithm is not only the core element of information technology development, but also the key topic of cyberspace governance. Its hidden social attribute has imperceptibly influenced people’s social life.

　　(A) algorithm ethics anomie infringes on network technology civilization

　　Algorithms bring convenience to users to a great extent, such as algorithm recommendation to help users filter information. However, some scholars believe that with the wide application of algorithm technology, the autonomy of the algorithm itself is enhanced, and the autonomy of the person as the subject is weakened, which shows a trend of trade-off, and even the subject is hidden. Autonomy, that is, self-management, is the ability of the subject to construct his own goals and values and to make decisions freely and put them into action. This is because the algorithm technology itself is designed as a decision-making system, which also leads to more and more dependence on algorithms in many fields, such as policy making, social services, medical health, media communication, etc., while users’ own rights and interests such as choice and informed rights are infringed.

　　(B) algorithm ethics anomie pollution network spiritual civilization

　　Because the algorithm design mode depends on the existing social mode and the designer’s social cognition to a great extent, the algorithm design is often the reappearance of the current social mode and the designer’s thinking, which often substitutes the inherent prejudice and discrimination of society and designers, thus causing algorithm discrimination. However, the existence of algorithm discrimination and prejudice not only damages users’ right to know, but also infringes on the legitimate rights and interests of some groups. In addition, the use of many technologies such as algorithm recommendation leads to the increase of the influence of personal prejudice and social discrimination in cyberspace, which leads to public opinion polarization, network violence and other problems, thus polluting the construction of network civilization.

　　(C) algorithm ethics anomie damage network system civilization

　　Schoenberg pointed out in "Delete: The Way to Choose Big Data" that "the Internet has enabled human beings to live in a digital circular prison". In this era of big data, "the past is like a tattoo on our digital skin, forgetting has become the exception, but memory has become the norm". While users are living digitally, data records also leave traces. When minors access the Internet and use social media and other applications, their personal information and privacy, such as their faces, names, location information and browsing records, are easily recorded and preserved by these applications, leaving traces of data that are difficult to clear. Even algorithm technology collects and uses users’ information without their knowledge, thus infringing on their personal information rights and privacy rights and other related personality rights.

　　Third, pay attention to the optimization of algorithm ethics, and build a network civilization that is upward and good.

　　The Convention on Self-discipline in the Application of Internet Information Service Algorithms puts forward new requirements for the technical subject of algorithms from the perspective of algorithm ethics and network civilization construction. Through summing up, it is mainly carried out around these three levels: first, using good technology to promote the construction of network technology civilization; Second, promote algorithm fairness and promote the construction of network spiritual civilization; Third, implement the responsibility of technical subject and promote the civilization construction of network system.

　　(A) the use of good governance technology to promote the construction of network technology civilization

　　Technical requirements such as "promoting innovation and development" are put forward in the self-discipline convention on the application of Internet information service algorithms. On the one hand, the algorithm governance mechanism is established technically, the algorithm governance organization is set up, the algorithm governance system is continuously improved, and the algorithm safety emergency management plan is established and improved; Implement algorithm governance measures, increase resource investment, carry out algorithm ethics review, carry out algorithm security risk monitoring, evaluation and prevention and control, and effectively handle algorithm security incidents. On the other hand, promote design R&D innovation, continue to carry out algorithm research and development, actively master key core technologies, and integrate into the overall pattern of global scientific and technological innovation; Governing the internet through algorithms. Promote the application and innovation of R&D algorithms in Internet and other related fields, and provide better services for national security, social progress and industry development. Promote the innovation of algorithm application, strengthen the application of algorithm in social and economic fields, and thus promote the construction of network technology civilization.

　　(B) to promote algorithm fairness, and promote the construction of network spiritual civilization.

　　The Convention on Self-discipline in the Application of Internet Information Service Algorithms proposes to "abide by business ethics" and "practice socialist core values". On the one hand, technical subjects should actively practice and maintain mainstream values, take socialist core values into the core consideration, and abide by social public order and good customs and business ethics. On the other hand, technical subjects should resolutely implement the requirements of guiding opinions, strengthen industry self-discipline, and consciously accept supervision and management; Promote the fairness of information recommendation, effectively deal with invalid and false information, avoid algorithm bias and algorithm application data deviation, improve the optimization goal of recommendation algorithm, and thus promote the construction of network spiritual civilization.

　　(C) the implementation of the main responsibility of technology, and promote the civilization of the network system.

　　The Convention on Self-discipline in the Application of Internet Information Service Algorithms emphasizes the institutional requirements of "implementing the main responsibility" and "strictly observing laws and regulations", and requires technical subjects to abide by the law from the aspects of information release, information review and personal data and privacy protection, thus promoting the civilized construction of the network system. First, it is to strengthen the consciousness of subject responsibility, fulfill the obligation of algorithm governance, and assume the responsibility of algorithm governance. Strictly abide by the relevant national policy documents and laws and regulations, strengthen the awareness of law-abiding and compliance, continue to study laws and regulations, carry out algorithm applications according to laws and regulations, and resolutely do not touch the legal red line, so as to promote the civilized construction of the network system.

　　Author: Special commentator Ji Weimin (deputy director, researcher and doctoral supervisor of Institute of Industrial Economics, China Academy of Social Sciences)

　　Zeng Leixiao, a master of China Academy of Social Sciences, contributed to this paper.

　　

Speaking of which, this brand was a fire in the past, and it was the best in the school. But now, domestic electric cars are becoming more and more luxurious, and the interior is getting more and more upscale. Tesla’s simple style really makes people feel a little guilty. Is it worth buying? Today, as an ordinary car owner, I will talk to you about the shortcomings that people love and hate. Of course, in the end, I will also talk about its advantages. After all, every product has its two sides.

Let’s talk about maneuverability first. Because the car body is high and heavy, it is replaced with a harder spring, and the chassis is also adjusted to be sporty. In this way, the handling and body support really have nothing to say, and it is called a cool driving. However, the suspension is as hard as a stone. When driving everyday, when the accelerator is lifted, the nodding and turning caused by kinetic energy recovery is simply unbearable. Especially when crossing the bumpy road, the comfort of the rear passengers is simply a big problem, just like riding a roller coaster.

Let’s talk about voice technology. Tesla’s speech recognition, how to say it, is a bit "straight". Its instructions are mechanical, not as humanized and intelligent as domestic brand electric vehicles. Although it has improved after the update in the last two years, it still lags behind domestic brands. There is also a map of the car. I have encountered several times when turning reminders are too slow. In the end, I can only use my mobile phone to navigate directly. You said this was too noisy.

Also, the foot feeling of Tesla Model Y’s switch pedal is also a point that makes people vomit. Compared with other models, you have to spend more effort to step on it. And the feeling of braking feet is very strange, a bit like stepping on a rubber. I think this may be because Tesla used the brakes, which is very different from the traditional mechanical assisted brakes.

Charging speed is also a point I want to vomit. Compared with the new power brands of domestic electric vehicles at the same price, Tesla’s charging speed is indeed a bit behind the rhythm. It’s a terrible headache to have to wait for a long time every time you charge.

Sound insulation and interior are also the two major slots of Tesla Model Y. The sound insulation effect is not good, especially when running at high speed. The noise is unbearable and my ears are about to explode. The simple interior is also an important reason to dissuade many people. The comfort of the seat is not good, the padding of the rear seat cushion is relatively hard, and the backrest angle is also straight, so although the space is large, it is uncomfortable to sit up, just like sitting on a bench.

Having said so many shortcomings, do you think Tesla Model Y is useless? Actually, it is not. It still has many obvious advantages. For example, the chip system is complete, the OTA frequency of car updates is fast, the safety factor is high, and the battery life is stable. Tesla’s three-electricity technology is also relatively strong, and many people buy Tesla. There are also fast after-sales service response, reliable automatic driving, high coverage of charging piles and so on. These are the highlights of Tesla and the reasons why it can stand on the market.

So, is it worth buying Tesla Model Y? There is no standard answer to this question. Because everyone’s needs and feelings are different. For me, although it has some shortcomings that make me headache, it also has some advantages that I can’t give up. So, if you are also considering buying Tesla Model Y, I suggest you take a test drive first, and it is not too late to feel its advantages and disadvantages before making a decision. After all, buying a car is not a trivial matter! You have to think it over carefully!

Master Huang also converted to Rinpoche? I put it this way: "There are also shrines, Buddha statues and incense burning near my home. Then there is also a let-off. So I am still a man of faith. "

He commented on the popular Rinpoche in the market like this:

"I’d rather believe that most of them are real Rinpoche … I also know a famous Rinpoche, which is really coincidental. He has this kind of feeling himself, and people have found him, so he has become a very good Rinpoche before."

This was revealed to reporters by Huang Xiaoming himself when he was promoting the new play "Datang Xuanzang".

Recently, another The Journey to the West IP movie appeared. The production of "Da Tang Xuan Zang" directed by Jianqi Huo and starring Huang Xiaoming was completed, and a promotion meeting was held in Qingdao, the hometown of the founder.

For stars, "filming" is hard, so it is regarded as practice. For example, if you want to shave your head, you will be opposed by the Baby; For example, the weather is very hot, more than 40 degrees, and you have to walk barefoot on the ground; For example, there is no signal, you can’t contact the Baby, and you always walk alone. Huang Xiaoming bluntly said that it feels very lonely …

For another example, Master Huang, who likes to eat meat, also gave up meat!

The hierarch revealed that in fact, there were more famous and large-scale Tang Priest characters who found him, but the hierarch still listened to the voice of "faith" and resolutely chose this austere and seductive version of Tang Priest.

During the filming, he was careful not to eat, and he experienced all kinds of hardships and even recited scriptures every day, which was a blessing for the husband and wife and fulfilled his wish.

Director Jianqi Huo described Huang Xiaoming as silly, with simple eyes, which was very similar to Xuanzang’s obsession. This provoked the cinema colleagues at the promotion meeting to snigger. Huang Xiaoming didn’t want to refute, standing on the stage calmly said, "I am stupid. My mother thinks I should play Xuanzang. I am very similar to him. "

Master version of Wei Xiaobao, unforgettable this clear eyes …

Sina Entertainment commented on the founder: "In the story of the Journey to the West and the hot New Year’s Eve of the monkey Tang Priest, Huang Xiaoming chose Xuanzang without aura-the monkey without reinforcements, almost no beautiful women seducing along the way, no spells to read, and even Bai Longma. Oh, there was a horse, but Xuanzang walked all the time and never got on the horse. "Datang Xuanzang" is such a film that used to learn from the scriptures, relied on transportation, and basically ate soil every day. Under foreseeable circumstances, it is not expected to gain anything at the box office. Perhaps he has made many films such as "The White-haired Witch" and "How to Shengxiao Mo". Xiaoming has been tired of realizing market recognition, and he is gradually giving back. "

There are too many scenes like this …

My heart is so tired …

The following is an interview with the leader by Sina Entertainment:

Huang Xiaoming revealed in the dialogue with Sina Entertainment that he had actually converted to Buddhism, and the fate came many years ago, so he converted in Putuo Mountain. Formed a deeper bond with Buddha,What does Huang Xiaoming think of so many Rinpoches in Weibo?

"Rinpoche is also a human being. He is both a Buddha and a flesh, so he is a flesh Buddha. Then he also has his worldly desires, and he will have his worldly troubles. Then many Buddhists I know, whether they are Buddhists, Buddhists or Rinpoche, will have happy and unhappy times, happy and unhappy times. So in fact, I think people still rely on themselves. Really, I think all practice depends not on others, but on myself. "

Sina Entertainment: I said earlier that filming "Datang Xuanzang" itself was like a practice. What impressed you now?

Huang Xiaoming: I think my inner strength still comes from my understanding of Xuanzang, because our play is adapted from Xuanzang’s biography. When I read Xuanzang’s biography, I was really moved by him. I think we really need this spirit in real life, and we can think about what this setback is. I think you are already a very lucky person, so you will feel that you need to redouble your efforts to do what you are doing now.

Since its introduction to the market, it has been recognized by consumers with its hard-core appearance design and excellent off-road ability, especially in the northwest, and has become a weapon for many off-road enthusiasts to conquer the outdoors at this stage.

In fact, this generation of products has been in the market for a long time. Although the heat is not low, it will still have a certain impact on sales in the face of the impact of new products, especially new energy hard-core products. Recently, a group of spy photos about the new tank 300 were also exposed online.

Through the spy photos, it can be found that the new design scheme still continues the design of the current model. Of course, this "classic" hard-core shape is also the reason why consumers choose him, so the probability of making major changes is very low.

According to the past routine, it can be seen that the camouflage stickers are mainly concentrated in the door position, which is expected to be the focus of the new car upgrade in the future, but there is not much accurate news yet.

The interior is also the place where the new car has changed the most, but it basically focuses on the improvement of details, while the overall outline has not changed.

From the details, it can be found that the central control screen of the new car has also been upgraded from the original embedded to suspended, and its size will be further increased. It is expected to be equipped with the latest in-vehicle intelligent system, which is believed to improve the experience.

In addition, the new car will also be equipped with the latest two steering wheels, and the function buttons on both sides also adopt a more concise wheel operation mode. However, the iconic aircraft push rod block will be cancelled, and the design of the chest block will be adopted in a high probability, so it is expected that the new car will be adjusted on the central island in the future.

As for the power system, it is expected to be consistent with the current model, that is, equipped with a 2.0T turbocharged engine, and matched with an 8AT gearbox, in which the maximum horsepower of the engine is 220Ps and the maximum torque is 380 N m.

summary

For Tank 300, it can also be said that it is the first choice of many off-road mr. six at the current price, and this car has also been in the market for a long time. Judging from the feedback information at this stage, it is indeed a product with excellent quality, and it is indeed a product that can cope with the vast majority of car scenes with the hardcore modeling design.

However, the current development momentum of the new energy hard-core SUV market is extremely strong. For example, the official selling price of Equation Leopard has been lowered to 239,800 yuan, which will undoubtedly have a great impact on the traditional fuel hard-core vehicle market. Therefore, the challenge faced by tank cars is how to stabilize their market position, which has become an urgent problem to be solved.

Character characteristics: warmth and truth

Bo Huang’s success is not only a halo brought by the outside, but also his unique personality charm. His performances are always full of realism and convincing. No matter in the play or in private life, Bo Huang reveals a warm temperament, which makes people feel close. It is precisely because of this warm quality that the audience is more willing to accept his various roles.

In addition, Bo Huang’s sense of humor is also one of the important factors of his popularity. His witty performance in variety shows can often be the highlight of the show. Whether it is funny or emotional, he can find a suitable starting point to let the audience feel the joy of life in a relaxed and happy atmosphere.

Social influence: a symbol of chasing dreams

Bo Huang is not only a successful actor, but also an inspirational role model. In this era of appearance, he told everyone with his own experience that the real charm comes from the inner abundance and the display of talents. With the help of her works to convey her positive values, Bo Huang has become the idol of countless young people.

His experience constantly inspires people and makes them believe that no matter what his appearance is, only by constantly pursuing talents and dreams can he shine in his own field. Bo Huang’s truthfulness and hard work in life have led more young people to explore their own potential and achieve their life goals.

Summary: Symphony of Talent and Dream

Bo Huang’s story, like an inspirational film, vividly depicts the face of an artist who climbed the peak in the competition. As he showed, the real charm lies in inner abundance and unremitting pursuit. Bo Huang told us with his own experience that in this colorful world, only those who persist in pursuing their dreams can win their own glory.

Bo Huang is such a stage artist who conquered the audience with talent and dreams. His existence makes us believe that no matter what our appearance is, as long as we have talent and pursuit, we will eventually shine brilliantly on the stage of life. Yan value is not omnipotent, and talent shines!

　　On the evening of July 28th.

　　Opening ceremony of the 31st Summer Universiade.

　　In Chengdu, Sichuan

　　Xin Dongan Lake Sports Park Main Stadium

　　Hold a grand ceremony

　　Young people from all over the world meet in Chengdu

　　Go to this grand gathering of youth together

　　All kinds of moments in this "big Party"

　　Let netizens call for shock.

　　Count backwards from 12.

　　Set sail in the golden awn, the "bird of the sun"

　　Fireworks at previous large-scale events

　　They all start counting down from "10"

　　This Universiade started on the 12th.

　　Why is this?

　　It is understood that as the opening ceremony,

　　The dominant image of the "sun god bird"

　　There are 12 rotating toothed golden awns at equal intervals.

　　So the countdown also starts from "12"

　　This Universiade has a total of

　　411 athletes from more than 100 universities across the country

　　Represent China in the competition.

　　With the delegation

　　Dressed in red and white costumes, slowly enter the stadium.

　　China red jumping all over the screen

　　Arouse bursts of applause

　　"Flowers bloom to welcome guests"

　　Golden fireworks are too shocking.

　　This opening ceremony

　　Fireworks show

　　Left a deep impression on netizens.

　　When the Universiade was announced,

　　A golden hibiscus flower blooms

　　"Rongcheng" Chengdu "Flowers bloom to welcome guests"

　　Welcome college athletes all over the world.

　　Then appeared in the air.

　　The words "WELCOME" and "welcome"

　　It is understood that this fireworks display

　　With gold as the main visual element

　　Symbolizes youthful brilliance and vitality.

　　Netizens have said:

　　It’s spectacular and shocking!

　　31 "Last Torchbearers"

　　Straight to the torch tower

　　This ignition ceremony

　　Different from the previous "last stick"

　　The 31st Universiade chose

　　31 "Last Torchbearers"

　　Complete the ignition together

　　The sun god bird’s ignition panel is radiant.

　　spiral up

　　Ignite the bird symbolizing the sun.

　　12 golden awns of aerial fireworks

　　Fireworks pass, birds spread their wings.

　　Finally ignite the torch tower outside the venue.

　　The main torch tower outside the stadium shines brightly.

　　Open the Universiade moment

　　Netizens have said that

　　This way of lighting is amazing!

　　It is worth mentioning that

　　The guide’s clothing is based onpepperFor inspiration

　　A beating "small pepper"

　　Has become a beautiful landscape.

　　In Chengdu, of course, it is inseparable.pandaas an onomatopoeia

　　At the opening ceremony, the mascot Rong Bao

　　Jumping all the time

　　Every delegation has a "conspicuous bag" in front of it.

　　It’s so cute!

　　Sunshine is one of the theme elements of the opening ceremony.

　　A song will be a Sichuan-Chongqing folk songThe sun comes out with joy

　　And famous European songsMy sunCompile together

　　Sing the sun is shining and sing with joy.

　　What a celebration!

　　Click on the video to feel the vitality and sunshine together ↓

　　In the performance, the dancer’s style.

　　derived fromBronze figures unearthed from Sanxingdui site

　　Masks worn by actors.

　　The prototype is a bronze vertical mask.

　　Also from Sanxingdui site.

　　besides

　　Elements of facial makeup in Sichuan operaAlso show it

　　On the one hand, there are energetic sports performances of young college students.

　　On the one hand, Sichuan Opera shows its face changing.

　　Ancient and modern complement each other.

　　This is probably Chinese romance.

　　The grand opening of Chengdu Universiade

　　I believe there are more moments.

　　Stay in your memory.

　　Starting from tomorrow, college athletes

　　Will go to various venues.

　　Let’s cheer for the athletes!

　　Producer Li Zhe

　　Editor-in-Chief Du Xianhan

　　Editor: Wang Di Pei Yongbo

　　Cartography, Meng Xianglong

　　Proofreading Gao Shaozhuo

　　Part of the material comes from Xinhua News Agency and vision china.

"Shenjiang No.1" has an average daily excavation of 4.5 meters.

　　In Section 1 of the Pearl River Mouth Tunnel of Shenzhen-Jiangmen High-speed Railway, the shield machine "Shenjiang No.1", a pioneer tool for tunnel excavation, excavates 4.5 meters per day, with a maximum excavation of 12 meters per day. From the gravel sandstone formation where it is located, it will enter the granite area with hard geology 30 rings further.

　　To this end, construction workers are recently replacing the "teeth" of this "dragon"-the blade. After the replacement, it will continue to be put into construction and complete the final attack.

　　Shenjiang high-speed railway is an important part of the coastal passage of China’s "eight vertical and eight horizontal" high-speed railway network. The line starts from the newly-built Shenzhen Xili Station, passes through Dongguan City, Guangzhou City, Zhongshan City and Jiangmen City in the west, and connects to Jiangmen Station. The main line is 116 kilometers long, with a bridge-tunnel ratio of 98%.

　　The line needs to cross the Lion Ocean in the Pearl River Estuary. The Pearl River Mouth Tunnel, one of the control projects in the whole line, has a total length of about 13.7 kilometers, a maximum depth of 106 meters and a maximum water pressure of about 1 MPa. It is the deepest subsea tunnel in China at present.

　　The tunnel is designed as a single-hole double-track high-speed railway tunnel. The diameter of shield machine excavation is about 13.4 meters. The shield segments are designed with nine equally divided structures, and the capping blocks are also larger than the conventional design size. It is a large-diameter shield tunnel.

　　Moreover, the geological conditions it crosses are very complicated, and it needs to cross 13 kinds of strata, 5 kinds of composite geology and 17 fault zones, such as silt, soft sand and extremely hard bedrock uplift. The full-face hard rock excavation is about 2.8 kilometers long, and the maximum strength of granite is 124.6 MPa.

　　According to the characteristics of the project, the Pearl River Mouth Tunnel of Shenjiang High-speed Railway adopts the combined construction method of "shield at both ends+middle mine". The starting shafts of shield at both ends are located in Humen Town, Dongguan City, on the east side of the estuary, and Wanqingsha Town, Guangzhou City, on the west side. Two tailor-made domestic shield machines-"Shenjiang No.1" and "Shenjiang No.2" came into being, heading in opposite directions. In Nansha District, Guangzhou, an inclined shaft is set up, which is constructed from the middle to both sides by mining method to connect the tunnels dug by shield machines.

　　Shield construction is safe and controllable in quality.

　　Shield tunneling, synchronous grouting, segment assembly and box culvert assembly are the four main processes of shield construction. Each working procedure should follow the corresponding standardized operation flow to ensure the safety and quality control of shield construction.

　　The pipe wall of the Pearl River Mouth Tunnel is composed of precast segments made of reinforced concrete.

　　In the face of high water pressure and high corrosion environment, the segment adopts gasket and anti-corrosion technology, which greatly improves the waterproof, anti-corrosion and anti-seepage performance of the tunnel. At the same time, the synchronous grouting process is strictly controlled, and the connection between the formed tunnel and the external water system is isolated, so that the tunnel is impermeable and leakproof.

　　The front end of "Shenjiang No.1" shield machine is where its main drive and central cone are located, and the central cone is connected with the cutter head.

　　Among them, the main drive is the core and most precise component of the shield machine, and it is also the key of the whole pressure-resistant system. "Shenjiang No.1" shield machine is equipped with the main drive seal automatic pressure maintaining system, which can effectively cope with the excavation in high water pressure environment. It is also equipped with an on-line oil detection system to realize the on-line inspection of the "blood index" of the main drive and ensure that the core components of the main drive are normal.

　　Technological innovation runs through the whole process of shield tunneling.

　　In order to adapt to the seabed conditions, "Shenjiang No.1" has adopted a number of technologies with independent intellectual property rights-high-precision gas-liquid pressure balance control technology of the excavation bin to ensure the stability of the excavation bin in the subsea shield construction.

　　Informatization and intellectualization always run through the process of shield tunneling. "Digital Deep River" information platform realizes BIM visual application platform and remote control of shield machine. On the screen of the cab, real-time monitoring system of shield tunneling parameters, advanced geological prediction system of shield tunnel, cutter head and cutter wear monitoring system of shield machine, main drive seal monitoring system, shield equipment maintenance management system and grouting density detection system behind segment wall are displayed respectively.

　　The data of these systems will be transmitted back to the digital shield module of BIM visualization application platform, and the excavation of large shield projects can be monitored remotely through digital shield.

　　Around shield construction, technicians provide a series of support services from data collection, application analysis to decision optimization, so as to guide shield tunneling construction quickly and accurately and ensure construction safety.

　　BEIJING, Beijing, November 17 (Reporter Zhang Ni) On the 17th, the reporter learned from the Beijing Center for Contradiction Analysis and Research of Letters and Calls that the Beijing Letters and Calls Office is actively building a big data analysis platform for "smart letters and visits". In the future, the platform can monitor and accurately predict the petition situation in real time through machine learning and artificial intelligence big data analysis technology.

　　On the 17th, the expert review meeting for the acceptance of the big data analysis platform project of "Smart Letters and Visits" in the capital was held in Beijing. Zhongxin.com reporter Zhang Nishe

　　On the 17th, the Beijing Center for Contradiction Analysis and Research of Letters and Visits held an expert review meeting on the acceptance of the capital’s "smart letters and visits" big data analysis platform project in Beijing. At the meeting, the platform passed the acceptance and is expected to be officially put into use from the beginning of December.

　　The reporter learned from the meeting that in order to grasp the key to the development of letters and visits in the new era, Beijing Letters and Calls Office has actively built a "smart letters and visits" big data analysis platform, and the specific construction of the platform is under the responsibility of Beijing Letters and Calls Contradiction Analysis and Research Center.

　　According to reports, the platform will monitor and accurately predict the situation of letters and visits in real time through machine learning and artificial intelligence big data analysis technology, which can not only grasp the development trend of letters and visits at any time, grasp the signs of extreme events, but also predict the possibility of future development of letters and visits from the source, so as to plan ahead and resolve the contradictions and conflicts between letters and visits in the bud.

　　Specifically, the big data analysis platform of "smart letters and visits" in the capital mainly includes two functions, namely "deep mining" and "situational awareness".

　　Among them, "deep mining" refers to the use of text mining and advanced NLP natural language algorithm to analyze the feelings expressed by the petitioners’ sentences and words in letters, eliminate subjective prejudice, and discover the objective laws of petition data based on artificial intelligence. The study of the emotional tendency of the complainant can better describe the "portrait" of the complainant.

　　"Situation awareness" mainly includes two aspects. On the one hand, it means that on the basis of "deep excavation", the platform can make correlation analysis of events and predict the trend of letters and visits, thus laying a solid foundation for accurately investing in letters and visits resources. On the other hand, through text mining, the key words of letters and visits are captured, and relevant laws and similar cases are automatically and real-time pushed for business workers as work reference.

　　In addition, in order to transform the petition data into multi-level and multi-dimensional information, reveal the logical connection behind the data, and then promote scientific decision-making, the Beijing Center for Contradiction Analysis and Research of Letters and Visits put forward the concept of "petition index" in 2011, and began to study the petition index in 2012.

　　Based on the data of letters and visits, this study aims to construct letters and visits indicators through the quantity and quality of letters and visits, quantitatively present the current situation, characteristics and development trend of social risks, build an objective and scientific evaluation standard and system for letters and visits, and enhance the forward-looking, systematic and targeted work of letters and visits. At present, the "index of letters and visits" has the foundation to be popularized throughout the country.

　　Experts attending the meeting commented that the two major innovations, namely, the big data analysis platform of "Smart Letters and Visits" and the application system of letters and visits index, have become the first step towards the era of artificial intelligence in the field of letters and visits in China, which is also a crucial step. This will fundamentally change the dilemma of passive response and resource consumption in traditional petition work, and open a new mode of petition work with active response and accurate allocation of resources. (End)

No matter where you travel, your face value is impeccable, whether it is to give you the first look of fashion and dynamic, or to be exquisite for a long time. In terms of design style, the overall design of BMW X1 is favorite. The front face of the whole car looks domineering, and the headlights on both sides are quite layered. After the eagle-eye headlights are lit, they look very energetic. The waistline design is still BMW’s unique appearance design, and the enchanting figure is vividly displayed! Helps highlight the styling of BMW X1. The outline of the tail shape is relatively stable, and the generous look is also very solid. The suspended LED taillights of the new car are more unique.

Coming into the car, the interior modeling of BMW X1 gives people the feeling of being young and dynamic. The hollow steering wheel is made of leather and feels good. Plastic and leather materials are used above the bridge, which greatly enhances the grade sense of the whole vehicle. It is equipped with an 8.8-inch suspended central control panel, which is clear in display and rich in design. The front row is also equipped with a manual air conditioning control system, which can freely debug the most comfortable space atmosphere. BMW X1 is equipped with leather seats.

The length, width and height are 4616×1845×1627mm respectively, and the wheelbase is 2802mm. In the same class, the wheelbase of BMW X1 ranks 35th. The interior space of the car is relatively spacious at the same level, the height and width of the car are ideal, and the legroom in the back row will not feel cramped, which belongs to the upper-middle level at the same level. The skylight of BMW X1M35Li provides a wider field of vision, which can create a better visual environment and good sensitivity for the rear passengers and increase the light entrance for the whole vehicle. Among the models of the same price and class, the trunk volume of BMW X1 ranks 17th. Spatial performance is limited by vehicle positioning, and the performance is acceptable, and the flatness is no problem, but the total space is average.

BMW X1 is equipped with a 2.0 engine with a maximum output of 221kW and a maximum torque of 400Nm. The whole power parameters are superior in power performance among engines of the same class, which can provide better power performance. The official measured acceleration of BMW X1 is 5.6S, ranking 29th among 250,000-400,000 SUV models.

The active/passive safety configuration of BMW X1 is complete, includingAutomatic parking、Zero tire pressure endurance tire、Automatic parking、Steep slope descent、hill start assist control、knee airbag、HUD head-up display、Anti-lock braking (ABS)、Braking force distribution (EBD/CBC, etc.)、Brake assist (EBA/BAS, etc.)、Traction control (ASR/TCS, etc.)、Active noise reduction、Engine start and stop、Side safety air curtain、Wireless charging of mobile phone、night vision system、LED daytime running lights、Forward reversing radar、Tire pressure monitoring、Steering wheel heating、Body stability control (ESP/DSC, etc.)、Rear reversing radar、Fatigue reminder、Remote parking、Child seat interface、Lane keeping (LKAS)Equal configuration.

Among them,Automatic parkingYou can avoid stepping on the brakes for a long time or needing to pull frequently;Steep slope descentCan safely pass through steep slope road conditions at low speed;knee airbagReduce the injury of the car interior to the occupant’s knees in the secondary collision.

In addition to the above description, we can also go to the Easy Car Forum to browse more real car feedback from actual buyers, or use our experience.

Author | Wei YuqiEdit | Sunshine

In 1728, the French physician Fauchard punched holes in a long arched metal strip of a tooth and fixed the strip to the tooth with thread, thus achieving the purpose of straightening teeth. This is the beginning of global orthodontic treatment.

Since then, with the continuous research on orthodontics, related technologies have made great progress, but there are still shortcomings in the eyes of users.

Zia Chishti, a master’s student at Stanford, was an orthodontic patient. He wore the prevailing metal brackets of the time, which made him look a little unsightly and sore whenever his teeth were forced.

The poor experience of using metal brackets led Zia Chishti to discover transparent retainers, which can also help with tooth "shaping". From this, Zia Chishti thought of using invisible braces to solve the problems of metal brackets.

In 1996, Zia Christi teamed up with Chinese technical background Wen Huafeng to establish Avery Technology and designed the world’s first invisible braces "Invisalign Beauty". Today, Avery Technology has become the world’s leader, with a market value of nearly 50 billion US dollars.

From the discoverer Fauchard to the innovator Zia Christi, the experience of the predecessors has shown that there are many key points in this business. These include patient needs, technology, and as commercialization advances, channels have also become a key part. The newly listed Angel of the Times has copied the predecessor Avery Technology in the model, and the same is the key point that needs to be grasped.

However, there is a big gap between the achievements of Times Angel and Avery Technology. On the one hand, under the premise that the share gap is negligible, Times Angel does not have many obvious technical advantages; the leading position has not been exchanged for the ability to play well in the market; after the product structure is adjusted, the revenue growth rate has declined. On the other hand, it has not been able to avoid common problems in the industry such as dependence on dentists.

The "money printing machine" in the mouth

"Use technology to create a smile that affects the world" is the description in the value column on the official website of Times Angel. After the smooth listing, Times Angel has become the first "dental invisible correction stock" in China. Compared with patients who are still on the orthodontic road, investors in capital markets have tasted the beauty of "smile" first.

Angel was listed on the Hong Kong Stock Exchange on June 16. As of 10:16 on the same day, the share price rose to 473 Hong Kong dollars, an increase of 173%. According to the calculation of 200 shares per hand, one hand earned 60,000 Hong Kong dollars, surpassing the record of 55,440 Hong Kong dollars per hand earned by Beijing Holdings in 1997. It became a fully profitable new stock in Hong Kong, with a market value of more than 70 billion Hong Kong dollars.

Even if the market value fell on the 17th, compared with the issue price of 173 Hong Kong dollars and the valuation of 25 billion Hong Kong dollars, the trend of Times Angel is still rising. It can be seen that the capital markets are very optimistic about it.

Before going public, Times Angels spent 880,000 yuan and commissioned a market research report from Caution Consulting. The content of this report explains why capital markets are optimistic about Times Angels.The reason is actually very simple. The orthodontic industry has great potential, and Angel of Times leads the market share and enjoys the leading dividend.

In fact, long before the IPO door was opened, capital had already taken notice of the angels of the era.

In 2015, when Time Angel turned a profit, it became a star company. Feng Dai, who spent 11 years as a healthcare investor at Warburg Pincus, founded Songbai Investment with the support of Hillhouse Capital. The first case was to invest in Time Angel. According to the prospectus, Songbai Investment is currently the largest shareholder of the latter.

In the first three quarters of 2020, Time Angel has become the leading player in the domestic market.

In terms of achieved cases, Time Angel held 41.3% of the domestic market share in the first three quarters of 2020, followed by Invisalign with a combined 82.3% market share.

In 2015, there were only 47,800 cases of invisible orthodontics in China. By 2019, the number of cases had skyrocketed to 304,000, with a compound annual growth rate of 58.8%. It is expected to reach 3.80 million cases in 2030, with a compound annual growth rate of 25.9%.

In 2019, the size of China’s invisible orthodontic market was second only to the United States and ranked second in the world. In terms of retail sales revenue, the market size increased from $200 million in 2015 to $1.40 billion in 2019, with a compound annual growth rate of 56.0%. It will reach $11.90 billion in 2030.

Specifically, the industry’s penetration rate in 2020 is only 11.0%, far lower than the US market. Time Angel’s gross profit margin in the same period was 70.4%, 63.8% in 2018 and 64.6% in 2019. The adjusted net profit in the first nine months of 2020 exceeded 200 million yuan, nearly double that of the same period last year.

The market has great potential and the industry has high gross profits. The combination of these factors makes it impossible for the market not to treat the angels of the times differently. However, the enthusiasm of capital for the angels of the times is not entirely out of love for it.

Obviously, the entire medical beauty market, including orthodontics, has been a hot topic recently. Huaxi Bio, the leader of hyaluronic acid, and Tongce Medical, which also does oral business, have a market value of more than 100 billion. And the reason why they are optimistic is the same as the angels of the times.

Take Huaxi Bio as an example. The global hyaluronic acid market reached $74.50 billion in 2019, growing at a rate of 3.2%. Due to the wide popularity and acceptance of "hyaluronic acid" in the cosmetics field, the scale of China’s hyaluronic acid market has grown rapidly, and the growth rate is higher than the global level. The huge population base and plastic surgery demand make China expected to become the world’s largest hyaluronic acid consumer market.

In 2020, Huaxi Bio acquired Dongchen Bio, the fourth in the industry, and gained 8% market share from the latter. So far, Huaxi Bio has occupied half of the hyaluronic acid raw material market.

In terms of penetration rate, compared with the level of 1% to 2% in developed countries, the penetration rate of the Chinese market is only 0.18%, which is far lower than that of developed countries.

Huaxi Bio’s Mao Libby era angel is even higher. From 2016 to 2018, the gross profit margin of Huaxi Bio’s main business was 77.22%, 75.40% and 79.94% respectively, and the comprehensive gross profit margin has remained close to 80%. The gross profit margin of some products even exceeded 90%, comparable to Moutai. In 2020, the gross profit margin of the main business rose to 81.89%.

From Huaxi Bio and Time Angel, two leaders in different segments of the medical beauty industry, it is not difficult to see that the medical beauty industry is simply tailor-made for "track theory". Don Valentine, founder of Sequoia Capital, believes that it is better to invest in a company with a huge market demand than to invest in a company that needs to create market demand.

In other words, for the medical beauty star stocks in the capital markets, the capital is actually optimistic about the medical beauty industry, and the first place is Huaxi Bio or Angel of the Times.

The spots under the angel’s wings

The original Invisalign was unpopular because it was not effective and expensive. Zia Christi invested heavily in marketing, and in 2000 alone, TV advertising reached $31 million. The New York Times called it the more aggressive consumer advertising program the dental industry has ever seen.

However, this more aggressive advertising plan still failed to open up the market for Invisalign, and Avery Technology lost money for several years. It was not until Joseph M. Hogan, Zia Christi’s successor, adjusted his strategy and turned the marketing target from C-end patients to dentists. By sharing the benefits with doctors, Avery Technology opened up the market and thus got out of trouble.

From the experience of previous generations, marketing and dentists are as important to Angel of the Times as traffic is to e-commerce platforms. And this is where Angel of the Times falls short.

On the quota between marketing and R & D, the Angel of the Times embarked on the route of emphasizing marketing and neglecting R & D.

The performance of light R & D has two points. It is more intuitive that the R & D expenses of Times Angel are lower than the marketing expenses. The R & D expenses of Times Angel in 2018, 2019 and the first nine months of 2020 were 50.20 million yuan, 80.90 million yuan and 58.90 million yuan respectively, accounting for 10.3%, 12.5% and 11.4% of the revenue in the same period. The sales and marketing expenses during the period were 81 million yuan, 123 million yuan and 149 million yuan respectively, accounting for 16.7%, 19.0% and 18.2% of the total revenue respectively.Whether it is the scale of investment or the proportion of revenue, marketing expenses are higher than research and development expenses.

The same is true in terms of employee composition. As of September 30, 2020, Angel’s R & D team had 120 employees, accounting for 9.3% of the total number of employees, while sales personnel accounted for nearly 30%.

More importantly, the competition between Angel of the Times and Invisalign was very intense.The former’s market share in the first nine months of 2020 was 0.3 percentage points ahead of the latter, and after only three months, the latter achieved a narrow advantage of 0.4 percentage points. The market position advantage of the Times Angels is almost negligible, and the two are on the same starting line.

In terms of sales model, Times Angel has also adopted the model of dentists playing a leading role. However, domestic general dentists and orthodontists have the characteristics of large demand and unmet, which directly affects the long-term development of Times Angel.

According to the report, there were about 158,400 general dentists and 10,800 orthodontists in the United States in 2020, equivalent to 47.8 general dentists and 3.3 orthodontists per 10,000 people. In comparison, China had about 277,500 general dentists and 6,100 orthodontists during the same period, equivalent to 19.5 general dentists and 0.4 orthodontists per 100,000 people, far less than in the United States.

More importantly, a dentist who meets national requirements and meets technical standards has a long training period, ranging from five years to ten years. This exacerbates the shortage of dentists.

Also having a detrimental impact on development is the adjustment of Angel’s product structure.

At present, Angel of Times owns a total of four products, ranked by the average price from high to low as Champion Edition, Children’s Edition, Standard Edition, and COMFOS. From 2018 to 2020, the share of COMFOS with the lowest average price increased the most, from 1% to 13%. The champion version with the highest average price only increased by 5 percentage points, and the standard version with the largest proportion declined the most, reaching 23 percentage points.

At the same time, the sales of the Champion Edition increased from 15,800 in 2018 to 32,000 in 2020, and the growth rate slowed from 56% in 2019 to 29.5% in 2020. COMFOS sales increased from 1,200 in 2018 to 27,400 in 2020, and the growth rate fell from 1100% in 2019 to 90% in 2020.

The growth rate of revenue in the same period also fell from 32.38% in 2019 to 26.47% in 2020. Although the epidemic has had an adverse impact on revenue, the changes in the proportion of Champion Edition, Standard Edition and COMFOS still reveal a fact. That is, in the process of adjusting the product proportion structure, Angel of Times did not control the decline of Standard Edition, nor did it allow COMFOS sales to make up for the vacancy caused by the structural adjustment in time. This shows that,Although Angel of Times is a market leader, it is still unable to navigate market changes with ease.

In terms of revenue and profit performance, the leading position of Times Angel is even more unstable. Tongce Medical’s revenue in the first quarter of this year was as high as 631 million yuan, which was only 200 million away from Times Angel’s revenue in 2020, with a year-on-year growth rate of 221.59%. Net profit in the first quarter was 164 million yuan, close to the level of Times Angel in 2020. Invisalign’s parent company, Avery Technology, is even larger, with revenue of 2.472 billion US dollars and net profit of 1.776 billion US dollars in 2020.

Even so, the dynamic price-to-earnings ratio of the Angel of Times is still as high as 343 times, while Avery Technology is only 103 times. The Angel of Times, which has little market and R & D advantages, is overestimated to a certain extent.

conclusion

In 2019, Invisalign’s parent company, Avery Technology, and Covestro, a manufacturer of polymer materials solutions, released transparent correction products made of SmartTrack ? materials. This is the same move as Angel of the Times in research and development. In 2017, it announced the application of MasterControl, a new medical polymer material, to the whole line of products.

Through the comparison of these two materials, it is possible to see to a certain extent what the level of competitiveness of Angel of Times is on a global scale. According to multiple public information and research reports of securities companies, these two materials are on par in terms of comfort, elasticity, tear resistance and other major dimensions.

This once again clearly reflected the current situation of the Angel of the Age, that is, when the advantages are not obvious, the treatment is extraordinary. Since 2003, the Angel of the Age, who has gone through 18 years, has perfectly stepped on the pace of the times and has become the "angel" of tens of thousands of patients. However, the Angel of the Age itself has not found the "angel" who can help it out of the predicament.

Under the external worries and internal troubles, the leading position of the Angel of Times is not stable. Once the aura of leading position is lost, the capital that values the prospects of the industry will undoubtedly be the first to vote with their feet.