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Six babies a week enter ICU because of it, and the most rampant virus strikes in winter.

Original scientific parenting editorial department scientific family parenting

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It’s cooled down again! At this time, there will be many babies with colds, coughs and fever in the circle of friends. ……

However, we must remind you that you should never take a cold lightly because it is a common disease in autumn and winter.

Because in this period, there is also a popular virus that pediatric hospitals attach great importance to, which is respiratory syncytial virus!

Image source: scientific family parenting original

How terrible is syncytial virus? It is the first consistent pathogen of severe pneumonia in children!

Moreover, it is very similar to a cold in the early stage. Delayed treatment may cause many diseases, such as bronchitis and pneumonia, which may all be related to him!

Image source: scientific family parenting original

So, what are the characteristics of respiratory syncytial virus? How should parents find out in time? How to prevent it?

Today, Keda University (ID: kexueyuer 2012) will talk with you!

one

Heavy can be fatal! You must know five characteristics of this virus.

Respiratory syncytial virus is one of the common respiratory pathogens in children.

Because it is related to respiratory infection and can fuse infected cells, it is called respiratory syncytial virus.

Image source: scientific family parenting original

TA has the following characteristics:

(1) strong lethality, heavy can be fatal.

Respiratory syncytial virus is the main cause of pneumonia, bronchiolitis and even death in children under 5 years old.

In developing countries, more than 300 million children under the age of 2 are infected with respiratory syncytial virus and suffer from respiratory diseases every year, of which 2.5 million die.

26 groups of people are the most vulnerable to recruitment.

Respiratory syncytial virus (RSV) is a "good hand" who bullies and fears hard. It targets people with weak constitution, and the department has greatly helped you to take stock:

Image source: scientific family parenting original

③ Highly contagious.

Respiratory syncytial virus can be said to be the "indestructible body" in the virus world, and it can survive for several hours on the surfaces of objects and unwashed hands!

It "likes" crowded places, and its main transmission routes are droplets and close contact.

It can be said that sneezing can be contagious.

Image source: scientific family parenting original

④ It will be reinfected.

Children’s defense is weak, and the immune protection time of antibodies produced after treatment is short, so they may be repeatedly infected.

⑤ No vaccine.

There are two subtypes of virus, A and B, and each subtype is divided into different virus strains according to genotype, and the dominant virus strains keep rotating every year.

Therefore, no vaccine has been developed so far.

Image source: scientific family parenting original

Then if the baby is infected with this virus, how should parents judge for the first time? Ke will teach you a few tricks.

2

Cold or syncytial virus infection? 3 strokes to judge

Mild respiratory syncytial virus infection and its early symptoms are similar to those of the common cold, so it is easy to delay treatment and cause a series of complications.

The ICU of a hospital in Guangzhou received six children within a week, and several of them were put on ventilators because of respiratory failure!

The culprit is respiratory syncytial virus.

News source: Anhui Net

News source: Guangdong TV electric shock news

How can parents tell whether it is a cold or a virus infection?

Keda teaches you three simple and easy-to-use methods here, remember to watch+forward!

① Look at the cycle.

The course of respiratory syncytial virus is longer than that of cold infection, and the treatment period is generally 10~14 days, and the treatment period of cold is generally 5~7 days.

② Look at the symptoms.

The main symptoms of a cold are fever, dry cough without phlegm and sore throat. Although the symptoms of respiratory syncytial virus infection are similar to those of a cold, they are much more serious than a cold.

Keda has prepared a "invasion road map" of syncytial virus here. Parents can judge according to the symptoms of the baby through this road map:

Image source: scientific family parenting original

Summary: If the child has a cold for 3 to 5 days, the cough is getting worse, which affects eating and even wheezing, it is necessary to consider that the baby is targeted by respiratory syncytial virus.

③ Do virus nucleic acid detection.

When parents are not sure whether their children are infected with respiratory syncytial virus, they can do a respiratory syncytial virus nucleic acid test, and the test objects are mostly nasal secretions, and the results will be obtained in 15-30 minutes.

Image source: scientific family parenting original

What should I do after I decide to be recruited?

Let ke teach you how to deal with the situation!

three

Don’t underestimate! There were four symptoms, and they were rushed to the hospital.

In fact, this virus is a bit "watching the baby eat" and has certain self-limitation. Generally, it will begin to recover in about 7-12 days.

As long as the child’s immune function development is relatively normal, and the respiratory symptoms are not serious, which does not affect eating, you can do mild care for the baby:

Image source: scientific family parenting original

But when you meet these four situations, it is another matter. You must send them to the doctor as soon as possible!

① Difficulty in breathing, with the nostrils open and breathing hard, and the muscles below the ribs or thorax are depressed inward, and the breathing frequency is greater than 60 beats/min.

(2) fever > 38.5℃, and there will be repeated fever.

3 The child’s mental state is poor, such as irritability and refusal to milk; Or the desire to eat milk is acceptable, but due to frequent choking and spitting, the feeding amount has dropped by more than half.

④ Dehydration, dry mouth without tears when crying, no urine or oliguria in diapers for 6 hours, and dry skin.

Finally, having said so much, prevention is always the first. Please check this prevention guide quickly!

Image source: scientific family parenting original

That’s all for today!

In a blink of an eye, the winter is coming, and my parents have followed Keke through another round of spring, summer, autumn and winter.

Please see the parents at the end of the article, moving their hands and watching.

Tell keda that you will still be here next spring!

★ The relevant knowledge involved in this article has been reviewed by experts:

Wang Dongchen: Attending physician of pediatric internal medicine in 3A hospital, master of pediatrics, engaged in pediatric clinical work for five years, specializing in children’s respiratory diseases, specializing in the diagnosis and treatment of common diseases in pediatric internal medicine and newborns.

Original title: "Six babies a week enter the ICU because of it! The most rampant virus in winter strikes, and it is contagious when you sneeze! 》

Read the original text

Relevant persons in charge and experts from National Health Commission introduced the development and vaccination of vaccines in Covid-19.

At the press conference of joint prevention and control mechanism in the State Council on the 21st, Mi Feng, spokesman of the National Health and Wellness Commission, introduced that recently, China began to carry out COVID-19 vaccination for some key people engaged in imported cold chain, port quarantine, fresh market, transportation, medical disease control and other work.

China has laid out five technical routes to simultaneously promote vaccine research and development. According to the statistics of the World Health Organization as of December 2, at present, 15 vaccines have entered clinical trials in China, of which 5 vaccines have entered phase III clinical trials, and the vaccines that have entered clinical trials have covered all technical routes in China. Zheng Zhongwei, head of the working group of the vaccine research and development special class of the scientific research group of the State Council Joint Prevention and Control Mechanism and director of the National Health Commission Medical and Health Science and Technology Development Research Center, said: "In the world, we have the most vaccines entering the Phase III clinical trial, and the research and development of COVID-19 vaccine in our country is in the first phalanx in the world."

Zheng Zhongwei said that during the emergency use of COVID-19 vaccine, more than 60,000 vaccinators had been to overseas high-risk areas, and no serious infection was reported. The data on the effectiveness of the vaccine need to be analyzed at the end of phase III clinical trials or the results of mid-term blindness. However, the clinical trial data of Phase I and Phase II provide some effective reference indicators, such as neutralizing antibodies, which can show that COVID-19 vaccine in China has good safety and effectiveness.

Wang Huaqing, chief expert of immunization program of China CDC, introduced in detail the immune mechanism that plays a role after vaccination: COVID-19 vaccine can specifically identify the invading pathogen, form immune memory, and quickly produce antibodies when encountering the same pathogen, so as to eliminate the pathogen and achieve the preventive effect. "If there is an opportunity for vaccination, the public should plant all kinds." Wang Huaqing said that the main time for COVID-19 vaccine to take effect is two weeks after the second dose of vaccine, which will produce better immune effect. At the same time, the efficacy of vaccine protection has a great relationship with the vaccination rate. When the vaccination rate in the population reaches a very high level, the immune barrier is established.

Who is not suitable for COVID-19 vaccination? What preparations need to be made before vaccination? What are the precautions during vaccination?

Wang Huaqing said that before vaccination with COVID-19 vaccine, the public should first understand the matters in the vaccine instructions, including taboos and other precautions. At the same time, it is necessary to understand the inoculation process, including the appointment method of local inoculation points and inoculation preparation. Wang Huaqing suggested that people with fever, patients with chronic diseases, patients with acute diseases and pregnant women should not be vaccinated with COVID-19 vaccine.

Because the research and development of vaccines in COVID-19 is relatively short, there is no research result on simultaneous vaccination of COVID-19 vaccine and other vaccines, so it is impossible to determine the safety and immune effect of simultaneous vaccination of two different types of vaccines. Therefore, it is not recommended to vaccinate two different types of vaccines at the same time in Wang Huaqing. (Reporter Shen Shaotie)

Price 139,800 yuan, Skyworth EV6ⅱ super charging series listed

On April 25, Buycar learned that at the just opened 2024 Beijing Auto Show, the II super charging series was officially launched, and the new car launched 3 models, with an official price of 139,800 – 169,800 yuan.

It is understood that the new car is based on Skyworth EV6 and is equipped with 100kW-4C configuration discharge function. In terms of power, the new car adopts super permanent magnet synchronous motor, 400V medium voltage motor and 800V high voltage motor are all from Junlian motor, 400V single motor maximum horsepower 231ps, peak power 170kw, peak torque 310N.m, 800V single motor maximum horsepower 340ps, peak power 250kw, peak torque 340N.m.

In addition, depending on the version, the new car has different battery life. The 430km version is equipped with a 54.75Kwh battery, and the 520km version is equipped with a 65.71Kwh battery. The ultra-fast charging time brought by the flash charging system only takes 10 minutes and 30 seconds to replenish from 10% to 80%. The 30% -80% charging time is 7 minutes and 30 seconds, using high-efficiency overcharging.

In addition, in terms of configuration, the new car adopts a new self-developed SKYLINK 2.0 intelligent car machine, which has a full range of intelligent "Xiaowei GPT", and is also equipped with an inductive electric tailgate and a comfortable and energy-saving air conditioner.

Biden hopes to meet with Putin in June. Where will US-Russia relations go?

  Beijing, May 5 (Xinhua) According to foreign media reports, on the 4th local time, US President Biden said that he hoped to meet with Russian President Vladimir Putin during his visit to Europe in June.

  According to reports, on the same day, after Biden delivered a speech on the COVID-19 epidemic at the White House, when the media asked whether he planned to meet with Putin during his European visit in June, he said, "This is my hope and expectation, and we are working hard."

  Biden will attend the G-7 summit in Britain from June 11th to 13th, and then go to Brussels, Belgium, to attend the NATO summit. This will be his first visit since he took office in January.

  According to the report, Biden and Putin had a telephone conversation on April 13th, and the White House subsequently announced that they would hold a summit in a third country in the coming months. On April 28th, Russian Presidential Press Secretary peskov said that Putin and Biden may meet in the summer, but the time and place have not yet been determined.

  US Secretary of State Blinken said recently that the possible face-to-face talks between Biden and Putin will be beneficial to both countries. He added that the United States does not want relations with Russia to deteriorate, but it will also respond to those unfriendly measures.

  In recent years, US-Russian relations have been constantly tense. Since Biden took office, the two sides have achieved limited cooperation in the field of arms control, but there are obvious differences on Ukraine, cyber security, human rights, election intervention and other issues, and the confrontation has intensified.

  On April 15, the US government imposed large-scale sanctions on Russia and expelled 10 Russian diplomats on the grounds of "malicious activities" such as cyber attacks and interference in US elections. On the 21st, the Russian Foreign Ministry announced the expulsion of 10 American diplomats in Russia in response.

  On April 26th, Russian Foreign Ministry spokesman Zacharova announced that the United States was included in the list of "unfriendly countries", and the countries on the list were not allowed to hire Russian citizens to work in their diplomatic institutions.

Volkswagen Tuyue Xinrui is listed against the upstart Shanhai L7, the new darling of the new energy SUV market

Recently, two high-profile SUV new cars have been launched on the market: Volkswagen Xinrui and Shanhai L7. They have gained a lot of attention as soon as they debuted. Among them, Tuyue Xinrui attracts attention with its price strategy that is close to the people, but carefully comparing the configuration and price, it has to be said that Shanhai L7 is more cost-effective.

This new car with a 1.5T + 2DHT power combination offers consumers more options with its pure electric battery life of 120 kilometers.

With its outstanding performance and eye-catching appearance, the Jietu Shanhai L7 is expected to win a good reputation in the market and achieve good sales results. It is tempting to wonder what is unique about this model? What kind of unprecedented control experience can be brought to the driver? Next, we will jointly unveil the mystery of Jietu Shanhai L7 and explore its unique charm.

Jietu Shanhai L7 starts pre-sale, and the electric hybrid SUV market welcomes a new star

Most people are not unfamiliar with the Jietu brand. As a sub-brand of Chery Automobile, Jietu is favored by young consumers. This time, Jietu has made another effort to launch a new plug-in hybrid SUV masterpiece, Jietu Shanhai L7, which has attracted a lot of attention and expectations.

It is reported that the Jietu Shanhai L7 has made its world debut at the 2024 Chengdu International Auto Show and has quickly started pre-sale. The car follows the family design aesthetic, with a fashionable and eye-catching appearance, especially the front face with a closed grille and sharp headlights, which is full of futurism and highly recognizable. The body details are cleverly integrated into new energy elements, such as the charging port on the side and the special decoration on the tail, plus a variety of two-color body options to fully meet the needs of personalized customization.

Equipped with 1.5T plug-in hybrid system, pure electric battery life is 120 kilometers

Jietu Shanhai L7 is not only eye-catching in appearance, but also eye-catching in power configuration. The car is equipped with a 1.5T plug-in hybrid system, has a pure electric 199kW and a hybrid 314kW power reserve, and has excellent power performance. What’s more worth mentioning is that its pure electric cruising range reaches 120 kilometers, which can easily handle daily trips and short trips. Users can freely switch between pure electric or hybrid modes according to the actual situation, and enjoy the convenience of new energy models.

In addition, the interior design of Jietu Shanhai L7 is modern, equipped with dual 12.3-inch high definition touch screen, supplemented by panoramic sunroof, panoramic image and other luxury configurations to ensure that the driving experience is both comfortable and convenient.

The competition in the new energy vehicle market is intense, and enhancing competitiveness is the key to breaking the game

In today’s automotive market, especially in the new energy sector, competition is fierce, and brands are introducing new products to provide consumers with more options. In this context, Volkswagen Tuyue and Jietu Shanhai L7 have arrived, and both cars are excellent in order to stand out among many models. But on the whole, Jietu Shanhai L7 is more cost-effective because of its high-value appearance and rich configuration, combined with the price. So it seems that Jietu Shanhai L7 is more worth buying.

Hot list of new cars in May: New models are listed together.

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"Car Public Opinion" Issue 23

Author Miao Jian Research Institute

May is an important period for the automobile market. Many new cars exhibited at the Shanghai Auto Show began to appear on the market one after another. Joint-venture brands and independent brands are competing to launch brand-new, mid-term and annual models, bringing more choices to consumers. This also makes the domestic auto market more exciting and interesting.

According to the statistics of Miaojian Information Public Opinion Monitoring Platform, in the TOP10 public opinion hot list of new cars listed in May, domestic brands dominated, and among the new cars listed, fuel/plug-in models accounted for over 60%.

40% of the new models were launched in this month’s list, mainly medium and large SUVs. Among them, the price is divided into multiple grades, the highest is 389,800 yuan (Chuanqi E9) and the lowest is 79,800 yuan (Baojun Yueye).

In the list, the old best-selling models Accord and LaCrosse are all replacement models. Small and medium-term models are all plug-in models except Seal, which is pure electric.

01

List of new cars on the market: the new Haval Xiaolong won the No.1 new car communication in May, and BYD dominated the list of three models.

Haval Xiaolong (brand new) is the model with the highest heat index this month. On May 15th, the launch conference of Haval brand new energy night and Haval Xiaolong series was successfully held in Beijing, officially releasing the brand new energy strategy of Haval brand and launching a brand new energy product-Haval Xiaolong series, with the starting price of new cars ranging from 139,800 to 179,800 yuan.

Nearly 6.5% of Haval Xiaolong’s sound volume is generated at the client. Know the car emperor, today’s headlines and Sina Weibo are the main communication channels, among which Weibo has 91,000 interactive voices, which is the second highest interactive car in this month’s list. "Intelligent four-wheel drive" and "travel audio-visual room" are the main communication points of Haval Xiaolong.

There were many hot spots in the launch of Haval Xiaolong. In addition to the introduction of new cars, Feng Mu, president of Great Wall Motor, launched the "Five Questions of the Soul" on the spot. In addition to expounding the current situation of China’s automobile market and the development prospect of Haval brand, Feng Mu also pointed out the bad practices of disrupting the market, such as friends raising the water army and worrying product quality, saying that some car companies regard "controlling public opinion as the primary productivity" and even commented that some car companies "won sales and lost the bottom line"

Guangqi Honda Accord (replacement) is another popular model this month, which was officially launched on May 20th. As an old-fashioned best-selling model, the new car was widely discussed and paid attention to during the listing period, and "brand-new" and "intelligence" were the main communication points.

Guangzhou Automobile Chuanqi brand continues to maintain the new strength and communication potential of "new cars every month".

During the listing of Chuanqi E9, Guangzhou Automobile Chuanqi 4S stores all over the country, with today’s headlines, knowing the car emperor and car home as the main positions, made a lot of momentum. The marketing text is short, matched with key words of product characteristics, emphasizing electricity and oil, four-fold luxury gifts and so on. Reflect saving and highlight preferential treatment.

02

Pre-sale release list: two brand-new models were officially unveiled, and Musa’s publicity momentum was strong.

In addition to the listed models, the models pre-sold and unveiled in May are mainly medium/large SUVs. Fuel vehicles account for 60%. There are two brand-new models, namely Beijing Hyundai Mussa and JAC Yttrium 3. Most of the other models were changed in the medium term.

On May 17th, MUFASA, a brand-new compact SUV product of Beijing Hyundai, officially announced its Chinese name-Musa, and started the pre-sale. Musa spread strongly, and "smart two rooms and one living room on board" was its main propaganda point.

On May 20th, the global pre-sale conference of Yttrium 3, an intelligent pure electric car of Jiangqi Group, was held in Hangzhou. Yttrium 3 (brand new) is Jianghuai Yttrium’s first intelligent pure electric vehicle. The new car is positioned as a pure electric small car with a pre-sale price of 97,900 yuan, focusing on "space, battery life and safety".

03

Observation on the launch of new cars this month

Enter the hall! Stars help out

Chuanqi E9 conference site: held in the Great Hall of the People, Zhang Yue, general manager of Guangzhou Automobile Passenger Car, explained the whole process, and sports star Su Bingtian helped out …

Combined with selling points, multi-scene layout

Bao Junyue also released the conference site: multiple scenes fit different product points of Bao Junyue, such as outdoor cross-country, modified life, intelligent driving, etc., so that the audience can understand the products more intuitively …

Senior executives go into battle together and explain in sections.

Haval Xiaolong conference site: Feng Mu, president of Great Wall Motor, and Qiao Xinyu, executive deputy general manager of Haval brand, respectively took the stage to explain …

Accord conference site: Li Jin, director of Guangqi Honda Automobile Co., Ltd., and Xiao Zhihui, general manager of the four-wheel development center of Honda Technical Research Industry Co., Ltd., took the stage to explain respectively.

Song ProD M-i conference site: Lu Tian, general manager of BYD Dynasty Network Sales Division, and Yu Yang, product manager of BYD Dynasty Network Sales Division, respectively took the stage to explain.

 

[2018 Online Media Ningxia Tour] Rice and Fishery Space Eco-tourism Park: the "online celebrity" of leisure tourism in Yinchuan Metropolitan Area

  At 22: 00 on August 14th, Hualong. com (special correspondent Luo Hao) On August 14th, more than 50 online media reporters from the northern line of Ningxia, a national online media, came to Ningxia Rice and Fishery Space Ecological Leisure Sightseeing Park in Sishilidian Village, Changxin Township, Helan County, Yinchuan City after finishing the interview in Shizuishan City.

  When I got off the bus, a neat piece of rice fields came into view, followed the steps to the observation tower in the garden, climbed high and looked far, and the pastoral scenery of full of green was panoramic. Different varieties of colored rice also made the online media reporter shout, "No wonder Yinchuan has ‘ Plug in the land of fish and rice in the south of the Yangtze River ’ The reputation of ".

  In 2016, Shilidian Village, Changxin Township, Helan County established Guangyin Rice Industry, Rice and Fishery Ecological Industry Sightseeing Park. In 2017, a rice fishing space was established, covering a total area of more than 3,600 mu.

  The rice and fishing space makes full use of agricultural and environmental resources, and builds a Yellow River Jin ‘an leisure agriculture industry demonstration base which integrates organic rice characteristic ecological agricultural production, fishery breeding, catering and fishing, sightseeing, leisure and entertainment, wedding photography, organic agricultural product processing, e-commerce sales and farmers’ training.

  "It’s not that I boast, we are really a leisure tour in Yinchuan metropolitan area ‘ Online celebrity ’ Point, it became a fire as soon as it was established last year, and a large number of tourists flocked to this piece of land with paper and rice and grass as pigments ‘ Painting ’ An idyllic complex. " Zhao Jianwen, the person in charge of the rice and fish space, said, "This place is not only suitable for gathering relatives and friends, but also suitable for bringing children to play. Children like to touch fish and pick up duck eggs in rice fields very much. According to statistics, in 2017, the rice fishing space received a total of 190,000 tourists, and it reached 150,000 in the first half of this year.

  Rice and Fishing Space has also conducted all-round training for leisure and organic agriculture practitioners, and radiation has driven 500 farmers to become rich.

  The innovation of the spatial pattern of rice and fishery is not only a beneficial exploration of the pilot work of the integration of the three industries in Helan County in recent years, but also provides important technical support and demonstration for the economic development of "agriculture+tourism" in the whole region. In recent years, leisure agriculture and rural tourism in Ningxia have developed rapidly, with nearly 900 related business entities, benefiting 170,000 farmers.

Mistaking bald heads for football AI’s poor eyesight is not only due to less training.

  Photo courtesy of vision china

  Ai growing pains

  Editor’s note In recent years, artificial intelligence has developed rapidly and its application fields have been expanding. However, at the same time, AI "rollover" cases are frequently searched. Based on this, this edition opens the column "AI Growing Pains" to focus on AI "rollover" events, analyze the phenomenon, analyze the reasons, explore the solutions, and look forward to its growth.

  Intern reporter Dai Xiaopei

  After the game, it is probably unprecedented for fans to ask referees to wear hats or wigs.

  At the end of October, Scottish fans experienced an "unforgettable" football match. In the Scottish Football Champions League match between Furness and Elven, the AI cameras on the sidelines turned a blind eye to whether the players passed the ball or attacked with the ball. Instead, they followed a linesman and took a close-up of "C position" from time to time. It turned out that the AI camera mistakenly identified the referee’s bald head as a football, so he chased the whole game crazily.

  Fans who watched the 90-minute game at home spent most of their time not watching the ball, but watching the bald heads. Many netizens joked that this game really "saw a loneliness".

  Why does the AI camera regard the bald head as a football? What do we need to do to prevent AI from making similar mistakes? Can you think that AI is "weak" when there is a "rollover" incident?

  Unconscious "provocation" from bald referees

  From direct participation in sports events to recording athletes’ performance, to live broadcast of competitions and analysis of athletes’ health status, AI is becoming the darling of the sports world. A few months ago, Barcelona Football Club (Barcelona) also joined hands with video technology company Pixellot to create an artificial intelligence coaching solution.

  Unexpectedly, AI, which has made great strides in sports, unexpectedly encountered an unconscious "provocation" from a bald linesman. Because the linesman’s bald head is too bright and the sun shines, the AI camera can’t tell which is the ball and which is the head. Previously, because the Furness team said that the AI tracking technology they used could clearly transmit the live images to the homes of every season ticket buyer, so that fans who could not go to the home due to the COVID-19 epidemic would not miss any game.

  It is reported that the camera used in the live broadcast of this competition is the multi-camera system provided by Pixellot, which cooperates with Barcelona. The system is powered by NVIDIA’s graphics processor (NVIDIA GPU), and the captured video resolution can reach 8K. These cameras can be installed in a fixed position without being manipulated by the camera operator. In order to capture the key moments, Pixellot collected hundreds of thousands of hours of sports videos to train its algorithm on the NVIDIA GPU of the local workstation.

  With a huge amount of available data, using deep learning algorithms and high-performance GPU computing blessing, it has three major driving forces to push AI forward. Why did Pixellot’s AI camera "roll over"?

  After the event, the relevant clubs and the technology companies that make cameras reflected. The problem seems very clear: the size and shape of football are similar to those of a human head, and the direct sunlight makes the AI camera fall into "confusion". I hope this will not happen again, because the Furness team responded that it knew the problem and will improve the next game to bring a better experience to the audience.

  Pixellot also said that it is not difficult to solve this problem. The existing target detection and tracking technology is mature. Pixellot didn’t consider the influence of bald head in the design stage, so it needs to collect some data of football and bald head to fine-tune the algorithm to eliminate the interference from bald head.

  Some technicians said that not only "this is a ball" data set, but also a "this is not a ball" data set is needed when training the AI camera of the live ball game. Bald head, bright white shoes, lighting, balls on the training ground next to the competition field and balls used by players to warm up are all interference factors that need to be considered when training AI.

  AI "poor eyesight" is the norm.

  Although the performance of AI cameras can be improved by increasing data "feeding", strengthening training and improving algorithms, some professionals believe that with the gradual expansion of AI application scenarios, such "rollover" incidents will exist for a long time.

  “AI‘ Rollover ’ It’s normal, no ‘ Rollover ’ It’s strange. " Professor eecs and Huang Tiejun, president of Beijing Zhiyuan Artificial Intelligence Research Institute, spoke frankly when interviewed by Science and Technology Daily reporter.

  Huang Tiejun believes that on the surface, the failure of the AI ? ? camera may be due to insufficient pre-training, but the main reason is that the current computer identification system is only trained with specific data. For example, in the above example, the neural network trained with a large number of football videos has surpassed humans in identifying football, but it ignores that this network is more sensitive to bald heads.

  It is common to recognize or "turn a blind eye" unknown objects at random.

  Machine vision is to endow the machine with visual perception, so that the machine has the scene perception ability similar to that of biological vision system, which involves optical imaging, image processing, analysis and recognition, execution and other components.

  "Take the camera as AI ‘ Eyes ’ In real scenes, there is still a long way to go for AI to recognize football and baldness like human eyes. " Huang Tiejun said.

  When can I finish this road and even realize that the eye of AI surpasses the human eye?

  It depends on when machine vision will bridge the gap with biological vision. "The brain in the skull senses the outside world in real time through more than 3 million nerve fibers, of which there are more than 1 million behind each eye." Huang Tiejun said, "The machine vision developed to this day is still a drop in the bucket compared with the biological vision system that took hundreds of millions of years to evolve."

  The human eye has strong adaptability, can identify targets in complex and changing environments, has advanced intelligence, and can use logical analysis and reasoning ability to identify changing targets and summarize laws. On the other hand, machine vision can use artificial intelligence neural network technology, but it can’t identify the changing target well. Due to the constraints of hardware conditions, the current general image acquisition system has poor color resolution.

  "Compared with biological visual neural networks, the visual neural networks of artificial intelligence are far apart in structure and scale, so their functions are much worse." Huang Tiejun said, "In real applications, machine vision ‘ Rollover ’ It is not an accident. It is only a case to identify the bald head as a football. Similar problems actually exist in large numbers. "

  Huang Tiejun said: "This time, the technology provider can make up for the loophole that the bald head mistakenly thinks of football, but there are still more loopholes. Deceiving the face recognition system with antagonistic picture training is only the tip of the iceberg."

  Different technical routes are racing.

  "Machine vision based on deep learning has made great progress in image recognition, but it has not really solved the perception problem." Huang Tiejun believes that deep learning is far from grasping the complexity of human visual system.

  Deep learning is based on the training of image and video big data, which is far from the biological vision that actively perceives the dynamic world, and it is still not out of demand for computing power. For example, if the video frame rate is increased from 30 to 30,000, the computing power of deep learning needs to be increased by 1,000 times.

  Biological neural network is a pulse neural network, which is more suitable for completing visual information processing. Huang Tiejun believes that learning from the neural network structure and information processing mechanism of biological vision system and establishing a new set of brain-like vision information processing theory and technology is the hope of restarting machine vision.

  Experts said that there are two main technical routes to develop artificial machine vision. One is to build a powerful intelligent system by collecting more data, increasing the amount of data and strengthening training; The second is to imitate the biological nervous system, follow the gourd painting gourd ladle, clarify the structure and even mechanism of the biological nervous system, and develop future intelligence on this basis.

  Huang Tiejun believes that the second path is more effective than the first one. "In a short time, the first one is easier to achieve results. But in the long run, it is more direct to start with biological neural networks and more confident to achieve the goal. "

  At present, most AI scholars support the first path, that is, to develop artificial intelligence including machine vision through "big data+big computing power". Huang Tiejun set foot on the road taken by a few people because he firmly believed that the biological visual neural network had great potential to be tapped. "Biological brain is the product of hundreds of millions of years of evolution, and it is the best transcendental structure. Powerful intelligence must rely on complex structures and stand on the shoulders of evolution. It seems difficult, but it is the fastest. "

  Turing, the "father of computer science", has long expressed his admiration for the biological brain. At the beginning of 1943, Shannon suggested that "cultural things" could be instilled in the electronic brain. Turing once retorted in public: "No, I’m not interested in building a powerful brain. What I want is just an ordinary brain, just like the head of the chairman of AT&T."

  Is developing machine vision, or artificial intelligence, starting from scratch, imitating biological neural networks, or is there another way? There is no conclusion yet. On different tracks, artificial intelligence is accelerating.

  Although there are many cases of AI "rollover", such as the practicability of Google AI eye disease diagnosis system is greatly reduced in Thailand, Tencent AI translation made a joke at the Boao Forum in 2018. But the AI era is accelerating and unstoppable.

  "It must be admitted that AI has indeed solved many practical problems, and it will gradually replace some functions of people. But we can’t exaggerate it too much. It is still far from our imaginary intelligence and needs more breakthroughs. " Huang Tiejun said that to keep an open mind and bridge the gap between "experimental simulation" and "real world", the development of AI technology has a long way to go.

The growth rate of national land sales revenue has accelerated, but third-and fourth-tier cities are still declining.

  The amount of land supply is related to the trend of the property market. According to the latest official data, the national land transfer income has turned from decline to increase, and the total supply of real estate land is approaching the same period last year, but the third-tier cities have fallen sharply.

  According to the data of the Ministry of Natural Resources, from January to August this year, the national real estate land supply was 82,300 hectares, a slight decrease of 1.6% year-on-year. Judging from the data of real estate land supply in the last three months, although the supply of real estate and residential land in the country decreased year-on-year in the first eight months, the reduction rate narrowed month by month; Among key cities, the supply of real estate and residential land in first-tier cities maintained an increasing trend year-on-year, and the growth rate expanded month by month.

  In terms of cities, real estate and residential land in first-tier cities have increased year-on-year. From January to August this year, 70 large and medium-sized cities provided 30,700 hectares of real estate land. The supply of real estate land in the first, second and third tier cities increased by 6.2%, 1.9% and 9.0% respectively, and the supply of residential land increased by 19.6%, 1.4% and 13.6% respectively.

  According to the data of the Ministry of Finance, the national land transfer income in the first eight months of this year has exceeded 3.7 trillion yuan, and the year-on-year growth rate is further accelerated than that in July.

  Ministries regulate the land market.

  Throughout the year to date, the domestic land market has gone through several stages from downturn to rapid warming and falling, and the current signs of land market cooling are more obvious.

  According to the data of the Central Plains Real Estate Research Center, in August this year, 70 large and medium-sized cities in China (corresponding to 70 housing price cities announced by the National Bureau of Statistics) had a total of 1057 land transactions, with a land transaction amount of 250.1 billion yuan, and the land transaction premium rate was only 8%, which was significantly lower than that in previous months. Judging from the land market situation, the recent expectation of tightening financing in the real estate sector gradually affected the land market.

  Zhang Dawei, chief analyst of Zhongyuan Real Estate, believes that, on the whole, the land markets in various places were relatively depressed in January and February this year. With the increase of credit market after the Spring Festival, the financing difficulty of housing enterprises has decreased. In April, the land markets in some cities showed signs of recovery, and the land markets in first-and second-tier cities continued to heat up, with the monthly land transaction amount of more than 300 billion yuan and the premium rate maintained at around 20%.

  Stabilizing land price is an important goal of real estate regulation and control in 2019. The rapid warming of the land market since the second quarter has attracted the attention of the regulatory authorities, and relevant ministries and commissions have successively taken action.

  In April this year, in order to achieve the goal of city-specific policy and classified regulation, maintain a stable supply of residential land, and guide market expectations, the General Office of the Ministry of Natural Resources issued a notice requesting that the "five categories" of residential land regulation targets be formulated and implemented in 2019.

  The notice requires that land supply should be stopped in cities above prefecture level, counties (county-level cities) with a population of more than one million, and commodity housing inventory digestion cycle is more than 36 months; For 36 to 18 months, the land supply should be appropriately reduced; For 18~12 months, maintain a flat level of land supply; 12~6 months, to increase land supply; For those less than 6 months, the land supply should be significantly increased and accelerated.

  Another Ministry of Housing and Urban-Rural Development, which is responsible for the regulation of the real estate market, also began to warn some cities where land prices and house prices rose too fast in April and May.

  In July, the new policies on real estate trust and overseas financing were introduced continuously, which had a certain impact on the real estate land acquisition policy. Since then, the premium rate of hot land began to decrease. In August, the number of operating land in 70 major cities increased significantly, with a total of 72 cases being the highest in the year.

  "The land market, like the property market, is only allowed to appear in Xiaoyangchun, but not in summer. Once the land market is overheated, the possibility of upgrading the policy is not ruled out. " Zhang Dawei said that since August, the land market has entered a stage of rapid fever reduction.

  According to the data of Zhongyuan Real Estate, the data of land acquisition by real estate enterprises also showed a significant decline. In August, the land acquisition by major real estate enterprises decreased significantly. Only eight domestic enterprises acquired more than 5 billion yuan, the highest of which was Vanke’s 15 billion yuan, followed by Poly’s 9.2 billion yuan, Jinmao’s 6.8 billion yuan, Sun Hung Kai’s 6.6 billion yuan and China Resources’ 6.4 billion yuan.

  Yan Yuejin, research director of the think tank center of Yiju Research Institute, also believes that in the second quarter of this year, the central government paid great attention to the overheating of land prices in some cities, and the policy fundamentals were tightened again, especially the tightening characteristics of the financing market were the most obvious, which made it more rational for real estate enterprises to purchase land in the third quarter.

  Third-and fourth-tier cities have obviously cooled down.

  In recent years, the regional characteristics of China property market have become more and more obvious, the trend of the real estate market has been divided, and the pricing of non-quality land by housing enterprises has been lowered. But the competition for high-quality cities and high-quality land is still fierce. Although the regulation policies of first-and second-tier cities are strict, for housing enterprises, in order to increase sales, they will still concentrate on land acquisition.

  While the first-and second-tier land markets maintain a high degree of heat, the land markets in third-and fourth-tier cities show signs of falling back. According to some statistics, since 2019, the land market in third-and fourth-tier cities has not performed as well as last year due to the tightening of shed reform scale and the early overdraft of some demand.

  According to the data of the aforementioned Ministry of Natural Resources, the supply of real estate land in third-tier cities decreased by 9.0% from January to August this year, and the supply of residential land decreased by 13.6%.

  Shanghai Yiju Real Estate Research Institute’s latest issue of "China Baicheng Homestead Transaction Report" shows that from January to September 2019, the transaction area of residential land in 64 third-and fourth-tier cities was 144.88 million square meters, down 7.1% year-on-year. Compared with the trend of first-and second-tier cities, the cooling characteristics of the homestead market in third-and fourth-tier cities are obvious. At the beginning of the past two months, the cumulative homestead transaction area has continued to expand year-on-year, further reflecting the characteristics of market cooling.

  Yan Yuejin, research director of the think tank center of Yiju Research Institute, said that from January to August, due to the influence of policy control and market expectations, the growth curve of related land purchases declined slightly, which fully reflected the cooling trend of the homestead transaction market. From the structural point of view, the cooling trend of third-and fourth-tier cities is more obvious, which is related to the problem that such cities are facing inventory backlog again.

  "From the reason, the current residential transaction market in third-and fourth-tier cities has cooled down and is facing the pressure of destocking again, which will dampen the enthusiasm of housing enterprises to replenish homesteads; At the same time, it also affected the capital withdrawal of housing enterprises and continued land purchase. " Yan Yuejin said.

  The growth rate of land sales revenue accelerated.

  The stabilization of real estate land supply at the national level has also affected the change of land transfer income.

  Since April this year, the Ministry of Finance has no longer disclosed the specific amount of revenue from the transfer of state-owned land use rights in the monthly financial revenue and expenditure, but only released the year-on-year changes. Judging from the data of the past few months, the land transfer income has achieved year-on-year growth in July after experiencing a decline at the beginning of the year, and it showed an accelerated growth trend in August.

  According to the data of the Ministry of Finance, from January to August this year, the national land transfer income increased by 4.2% year-on-year. From January to July this year, it was a year-on-year increase of 3.1%.

  In the first eight months of 2018, the income from the transfer of state-owned land use rights was 3.7 trillion yuan. In 2018, it reached 6,509.6 billion yuan, a year-on-year increase of 25%, and the total amount reached a record high.

  At the beginning of this year, due to the "worry" that the land market started in the second half of 2018 was cold and the phenomenon of land auction increased, many places also lowered their land transfer income expectations this year when preparing the government fund income budget for 2019.

  Yan Yuejin said that the current control of stable land prices is very strict. Recently, some hot cities have also actively carried out major inspections of the banking system. One of the contents is to check whether there are illegal funds entering the land purchase market.

  "It is expected that the residential land market will be characterized by cooling in September, especially considering that the current financial pressure of housing enterprises has begun to increase, so it is expected that housing enterprises will be conservative and tend to be rational. Of course, we need to look at September ‘ General drop+targeted cuts to required reserve ratios ’ The effect of policy. If the activity of residential transactions increases significantly, the enthusiasm of housing enterprises to subscribe for residential land in the fourth quarter may increase. " Yan Yuejin said.

  From 2011 to 2018, the national land transfer income was 3,316.6 billion yuan, 2,842.2 billion yuan, 4,125 billion yuan, 4,294 billion yuan, 3,254.7 billion yuan, 3,745.7 billion yuan, 5,205.9 billion yuan and 6,509.6 billion yuan respectively.

  There are still four months before the end of the year. If the current situation can be maintained, the income from land sales in 2019 is expected to exceed 6 trillion yuan again.

Spring full of mountains

  The scenery of Dahe Town in Tongzi County. Photo by Cheng Yong

  After a night of spring rain, Shan Ye, who had been sleeping for the whole winter, gradually stretched out. In the Dalou Mountain Range, spring is gradually sprouting in the mountains. On both sides of the road, there are peach blossoms, plum blossoms, camellia and rape blossoms … … The colors are intertwined with the green hills, just like a beautiful picture.

  We went to shi niu cun, Dahe Town, Tongzi County, Guizhou Province, to visit the 80-year-old afforestation model Weifafu. Starting from the county seat, the sky is already dawn. The car passed through the thick morning fog, passed the famous 72-way turn, and entered shi niu cun eastward. More than 300,000 Chinese fir trees planted by the Weifafu family grew on Daping Mountain at an altitude of more than 1,000 meters. The sun gradually dispels the morning fog. In the distance, the vast forest of Daping Mountain is as clean and green as washed in the spring sunshine.

  Along the mountain road, we walked into a green ocean. In the forest, the air is particularly fresh and cool, and the smell of flowers, trees and soil is everywhere. On a hillside, the old man in Weifafu was seen leaning over to pick up garbage in the forest with a bamboo basket on his back. When the old man saw us, he stopped what he was doing and came to shake hands with us with a smile. The old man is in high spirits and energetic, with a faint dew on his gray hair and grass clippings on his rubber shoes. His palm is wide and rough, with thick calluses.

  The sun shines obliquely on the straight fir trees from high places through the dense forest. A few birds are jumping on clusters of new leaves, twittering the news of spring.

  "You see, the tree, the bird came. When birds come, there are fewer insects. Bird droppings are rich in soil and trees are growing well. " The old man touched a stout fir tree and said happily.

  "Did you plant all these trees?"

  "More than that, there are more than 1,100 mu." The old man led us to a high place and pointed to the mountains in the distance: "These mountains are the farthest. If you walk, it will take a whole day to get there."

  I looked up and couldn’t see the farthest hill. It’s hard to imagine how hard it took Wei Fafu’s family to plant small saplings into today’s towering trees by shouldering their backs and walking dozens of miles of mountain roads.

  Speaking of afforestation, Wei Fafu has a lot to say. In 1950s and 1960s, due to excessive reclamation, the ecological environment of Daping Mountain was worrying. At that time, Wei Fafu often wandered alone on the mountain, looking at the barren mountain, listening to the mountain wind raging on the bare mountain, rolling up the dust all over the sky, and his heart seemed to be tightly pulled.

  In the spring of 1985, Wei Fafu, then the production team leader, decided to return the sloping farmland to plant trees. His decision was supported by his family. He applied to the village collective for contracting, signed a contract for greening barren hills, and received seedlings subsidized by the county forestry bureau.

  Since then, Wei Fafu’s family began to plant trees. In order to speed up the progress, Wei Fafu raced against time like clockwork. There is only one thought in his heart: "plant a variety of trees and turn the barren hills green as soon as possible."

  "Every day, at dawn, our family set off, and everyone was carrying hundreds of pounds of saplings. Two red marks were pulled out of the shoulders, and water bubbles were ground in a few days. The slope is steep and the road is far away. We only eat two meals a day, and the time saved is used to hurry. At the end of the day, the coat is often soaked with sweat, the pants are covered with dew, and the whole body is wet. " The old man still remembers the scene at that time.

  However, in the first spring, because of the serious soil erosion, low soil water storage capacity and lack of experience in planting trees, the planted trees only lived for a small part. Wei Fafu rallied and ran out of water, so they carried Mizukamiyama. He works in the forest for ten hours every day, and the action of planting trees is becoming more and more skillful. He scraped the soil with one hand and held the seedlings with the other, straightened the roots and carefully put the seedlings into the pit. Fir and pine seedlings are leafy and hard, and often prick their fingers, so he uses soft ant nest soil to stop bleeding and relieve pain. In summer and autumn, he went out early and went back to the forest to pull weeds. Even in the cold winter, he still patrols the mountain forest every now and then. After a year, he has worn out more than ten pairs of shoes. This year, the survival rate of saplings was as high as 90%.

  Speaking of the trick of planting trees, the old man smiled: "Planting trees is the same as being a man. The roots of saplings should be buried deeply and kept straight, so that they can easily take root in the earth."

  One minute, nine in charge. In order to afforest, he opened up a 10-mu nursery, and some seedlings were self-sufficient. He also set up a brick and tile factory to exchange all the bricks produced with villagers for working hours, so as to increase the labor input for planting trees. Winter goes and spring comes, year after year. Ten years later, with the efforts of Wei Fafu, the barren hills of Daping Mountain gradually became green, and the once-cut mountain spring water was restored, which solved the problem of drinking water and irrigation for local villagers.

  Someone once offered Wei Fafu a high price to transfer the forest, but Wei Fafu refused. He said: "for so many years, I have done it for green mountains and green rivers. Trees are my children. Trees are more important than money." In thirty-seven years, under his careful care, the mountain forest has never suffered a mountain fire. Today, the old man still insists on going to the Woods every season. The time with the tree became an indispensable part of his life.

  His contribution is gradually known to more people. He won back the honors of Guizhou moral model and Guizhou labor model. Now he still has a wish, and that is to join the Communist Party of China (CPC) as soon as possible. In May 2021, 79-year-old Wei Fafu submitted an application for joining the Party, which is the oldest applicant in shi niu cun’s history.

  In the distance, the breeze is Xu Lai, and the green waves are rippling in the forest. Listen, the branches and leaves rustle in the wind, as if the castle peak is greeting the old man.