1905 movie network news Starring in the gangster movie "Disaster", an international poster was released, directed by Jin Changxun, and new actors Hong Sibin and Jin Xingxi participated. The film was shortlisted for the "One Concern" unit of the 76th Cannes International Film Festival.

The film is known as "film noir of two dangerous men struggling to get rid of the reality with no future", which is the first time that Song Joong Ki has challenged the film noir genre. It is reported that the film "Trouble" is a work selected by Song Joong Ki and co-produced by a Song Joong Ki brokerage company, which belongs to a low-budget film with a small production scale. Surprisingly, as the starring role of the film, Song Joong Ki did not receive any remuneration, but starred at 0. This has also greatly increased everyone’s curiosity about movies.

The film tells the story that in order to get rid of the hellish reality, Yan Gui meets Qi Jian, the middle boss of the organization, and enters a dangerous world together. Song Joong Ki plays the role of the middle of the organization that believes in and leads "Yangui"bossFor him, the role of "Qi Jian" is a brand-new breakthrough different from his previous roles. Hong Sibin plays the 18-year-old boy "Yan Gui". In order to get rid of the tragic and dark reality, he devoted himself to the rough world.

Song Joong Ki said before: "Can participate in"disaster and turmoilI am very happy, this work is also a new challenge for myself, and I am deeply touched. "

　　The latest Global Report on Countdown to The Lancet in 2020 (hereinafter referred to as the Global Report) and the first China Report on Countdown to The Lancet (hereinafter referred to as the China Report) focus on the impact of climate change on the health of people in the world and China respectively. According to the report, since 1990, the death toll related to high temperature and heat wave in China has increased fourfold. Experts said, "The report reveals that achieving carbon neutrality will bring huge health and economic dividends, and China needs to constantly improve its health care system to enhance its resilience and cope with the impact of climate change."　　
　　Global Report: No country is immune from the health hazards of climate change.
　　The global report was jointly completed by more than 120 experts from more than 30 top academic institutions around the world. By continuously monitoring the health impacts caused by climate change, the global report should make an independent assessment of the actions on climate change and provide policy recommendations to governments. This year is the fifth global report released by The Lancet countdown.
　　The global report includes 43 indicators. Compared with last year, the new indicators include: heat-related premature death, climate migration and displacement, accessibility of urban green space, extreme high temperature, and economic cost of heat-related labor productivity loss.
　　New evidence shows that in the past 20 years, the number of elderly deaths related to high temperature has increased by 54%; In 2019, the number of days that people over 65 were exposed to the risk of heat wave increased by 2.9 billion days, almost twice the previous record.
　　In terms of coal consumption, it continued to rebound after a brief decline in previous years. In 2018, it increased by 1.2% compared with 2017 and 74% higher than that in 1990. In terms of outdoor air pollution, the total number of premature deaths related to outdoor air pollution in the world is still rising.　
　　China report: Climate change has aggravated health inequality.
　　On the occasion of the fifth anniversary of the landmark Paris Agreement, the first China report compares the significance of climate action to the health of people in China through 23 indicators. The report was written by more than 70 experts from 19 domestic and international institutions, including Tsinghua University and University College London.
　　Shockingly, since 1990, the death toll related to high temperature and heat wave in China has increased fourfold. Like the COVID-19 epidemic, climate change has aggravated health inequality. Compared with the early 2000s, every elderly person in China will have to endure 13 days of high temperature and heat wave in 2019, and the death risk of the elderly in high temperature days is 10.4% higher than that in non-high temperature days.
　　The report shows that all provinces and cities in China are affected by various health problems caused by climate change to varying degrees. Cai Wenjia, one of the chief authors of the China Report and an associate professor of the Department of Earth System Science in Tsinghua University, said: "Judging from the special weather and climate events this year, the Northeast has been hit by a typhoon’ triple whammy’ within half a month, which has never happened before." At the same time, the health threats faced by different regions are different, and targeted measures need to be taken.
　　In fact, China’s policy changes in recent years have proved that actively responding to climate change can significantly improve the health level of people in China. Affected by the surge in renewable energy investment, the share of coal in the total primary energy supply has decreased year by year, which has reduced the concentration of fine particulate matter pollution (PM2.5) by 28%, directly leading to a decrease of 90,000 deaths caused by air pollution every year.
　　At present, 51 countries in the world have formulated national adaptation planning documents combining climate change with population health, and 48 countries have completed scientific assessment of the impact of climate change on population health. At present, only three provinces and cities in China have formulated the above-mentioned planning documents, and six provinces and cities are carrying out related evaluation work.
　　"On the one hand, our report shows that China is facing huge health challenges, and it also reveals that achieving carbon neutrality will bring huge health and economic dividends." Professor Gong Peng, director of the Department of Earth System Science in Tsinghua University and co-director of Countdown Asia Center in The Lancet, added, "To do this, China needs to constantly improve its health care system to enhance its resilience and cope with the impact of climate change."

(Author: Lu Jian Source: "China Meteorological News" December 11, 2020 Third Edition Editor: Wang Meili)
　　

Benmao

Cloned cat

　　On the 19th of this month, the first commercial cloned cat in China was officially announced. This cloned cat named "Garlic" was born on July 21st this year. "Garlic" is also the first cloned cat in China.

　　It is understood that Huang Yu, the owner of the cloned cat "Garlic", chose cloning technology to restart a new life in order to commemorate the dead pet cat. This cloned cat was born on July 21st through natural delivery of surrogate cats.

　　Is the cloned cat "Garlic" the same as the deceased pet cat? Why is the coat color changed? Weekly reporter interviewed experts from Jiangsu Key Laboratory of Xenotransplantation to reveal the story behind cloning.

　　Cloning: the asexual reproduction of an organism

　　In 1963, Haldane, a population geneticist, first put forward the term "cloning" in a speech entitled "Biological Possibility of Human Race in the Next 20,000 Years".

　　In 1997, the news that a sheep named Dolly was born through cloning technology immediately attracted the attention of all over the world. Since then, cloning has become a hot topic for everyone.

　　Clone is a transliteration of the English word clone. Its original meaning refers to the cultivation of plants by asexual propagation or vegetative propagation of seedlings and shoots. With the passage of time, the connotation of cloning has expanded, which generally refers to the asexual reproduction of organisms through somatic cells and the population composed of offspring individuals with the same genotype formed by asexual reproduction; Usually, individuals or populations with exactly the same genes as the original individuals are produced by asexual reproduction using biotechnology.

　　In fact, cloning is no stranger to us. We often use this biological method of asexual reproduction in our daily life. For example, whenever spring blossoms, people who like to plant flowers and grass will do experiments in plant cutting. From a plant, cutting branches and cutting will get many plants with the same genetic material, which is cloning. Asexual reproduction is more common in lower organisms. The division and reproduction of bacteria and planarian is that the parent splits vertically or horizontally into two daughters, and then leaves the parent and becomes an independent individual, which also belongs to cloning.

　　However, does asexual reproduction exist in higher organisms? Scientists once thought that it was impossible to reproduce asexually from a mature somatic cell into a complete animal. Although a somatic cell contains a complete genetic information of an animal, somatic cells have been specialized. Generally speaking, liver cells can only produce liver tissue, and breast cells can only produce breast tissue … … The birth of Dolly sheep completely changed people’s understanding, and it pioneered the cloning of higher animals.

　　"First, the nucleus of a donor cell containing genetic material is transplanted into an egg cell with its nucleus removed, and then the two cells are integrated by micro-current stimulation, and then this new cell is promoted to divide and reproduce and develop into an embryo. When the embryo develops to a certain extent, it is implanted into the uterus of a surrogate animal to make the animal pregnant, and an animal with the same gene as the donor can be born." Li Rongfeng, a researcher at Jiangsu Provincial Key Laboratory of Xenotransplantation, introduced the cloning process of higher organisms.

　　She said that cloning technology does not need male-female mating, and does not need the combination of sperm and eggs. It only needs to extract a single cell from an animal, cultivate it into an embryo by artificial methods, and then implant the embryo into a female animal to breed a new individual. This cloned animal cultured with single cells has exactly the same characteristics as the single cell donor and is a "replica" of the single cell donor. Scientists in England and Oregon in the United States have successively cultivated Dolly, a cloned sheep, and Dolly, a cloned monkey. Scientists in China have gradually cultivated cloned cattle, cloned rabbits, cloned pigs and the latest cloned cats.

　　Wonderful cloning technology has shown broad application prospects, such as cultivating excellent livestock and producing experimental animals, producing transgenic animals, producing human embryonic stem cells for cell and tissue replacement therapy, replicating endangered animal species, preserving and spreading animal species resources, and maintaining ecological balance.

　　Four surrogate mothers gave birth to a cloned cat.

　　On January 9 this year, Huang Yu, the owner of the deceased pet cat, formally proposed to Beijing Xinuogu Biotechnology Co., Ltd. to clone "garlic" because he missed it too much.

　　After exploring the pre-experiments such as in vitro maturation culture conditions and parthenogenetic activation conditions of oocytes, the research and development experiment of cloned cats was officially started in August 2018, with a total of 152 experiments. Up to now, one surrogate cat has been successfully delivered, and one surrogate cat has been tested for pregnancy and delivery. In the "Garlic" project, a total of 4 surrogate cats were embryo-transferred. Among them, the surrogate cat CNTR258 was born naturally on July 21st, 2019, 66 days after embryo transfer, and the cloned cat Garlic was successfully produced. Garlic is a very cute British short-haired cat.

　　"Like the general principle of cloned sheep and cloned pigs, we knock out and enucleate the genes of surrogate cats after obtaining the oocytes of surrogate cats, and then implant the cells of cloned cats to form a fused cloned embryo for activation." Wang yining, deputy general manager of Beijing xinuogu biotechnology co., ltd, introduced the birth process of cloned cat "garlic".

　　"Judging from the current level of cloning technology, from the pregnancy of four surrogate cats, a cloned cat was successfully produced, and the success rate was high." Chen Dayuan, a researcher at the Institute of Zoology, Chinese Academy of Sciences, believes. Li Rongfeng also said that as a new cloned species, the pregnancy rate of 25% is very high. Take the cloned pigs of Jiangsu Provincial Key Laboratory of Heterogeneity Transplantation as an example. At present, one to three transgenic cloned pigs can be obtained after transplanting 100 embryos, and the cloning efficiency is about 3%.

　　Shi Zhensheng, a professor at the College of Animal Medicine of China Agricultural University, said: "The reproductive physiological characteristics of cats are different from those of most animals, because cats are not spontaneous ovulation animals, but one of the few ovulation-inducing animals. Their reproductive cycle is special, and cloning technology is difficult and complicated to operate. This successful breeding of cloned cats is one of the few successful cases in the world, marking a big step for China in the field of cloning. "

　　"For the public, spending 250,000 yuan to clone a cat may not be understandable. But I was very happy when I knew that the cloning price was 250,000 yuan. " Huang Yu, the owner of "Garlic", said that he had searched online, and there was a cloning company in South Korea that cloned cats and dogs at a price of 400,000 to 500,000, which was unacceptable. The domestic cloned cat price of 250,000 yuan is acceptable.

　　It can provide reference for cloning pandas.

　　On August 21st, the cloned cat "Garlic" was full moon. From the photos of garlic published on the Internet, we can find that there is a slight difference between the cloned garlic and the original garlic: there is a small black piece on the chin of the original garlic, but the cloned cat is gone; There are patterns on the left leg of the body, and the pattern of cloned cats grows on the right leg.

　　"There are epigenetic problems in the process of animal cloning. The so-called epigenetic problem is that environmental factors will lead to different gene expressions in organisms, but the genes themselves will not change." Li Rongfeng explained that the genes in the cloned cat’s gene nucleus are the same as the original genes from the cat’s cells, but there will be differences in gene expression during the reprogramming of somatic cells. The genes are inherited from the previous cats, but some genes are not expressed or over-expressed; In the cloned cat "garlic", there is a phenomenon that the coat color related genes are not expressed correctly.

　　Beijing Xinuogu Biotechnology Co., Ltd. also responded: "Cloning ensures that more than 99.9% genes are the same, but the hair gene expression is random. There are patterns on the body, and there is no guarantee of 100% consistency. " At the same time, Beijing Xinuogu Biotechnology Co., Ltd. also pointed out that cloned cats can not guarantee the same living conditions and feeding environment as ontologies, and their personalities may change.

　　So what changes may occur in personality? Li Rongfeng said that there are many acquired factors in the formation of cloned cats’ personalities, just as human twins will have different personalities in different environments; But there are some basic personality-determining genes. If they exist in the nucleus, their personality will not change greatly even if the environment is different.

　　What is the significance of the birth of the cloned cat "Garlic"? Li Rongfeng said that from the economic point of view, it is not as important as meat animals, but it caters to the emotional needs of some people, such as pet owners; It is also of great significance to be able to play a companion role.

　　"There is also a great significance in cloning cats, which are closer to giant pandas than pigs and dogs." Li Rongfeng said that the giant panda is a rare and endangered species and it is difficult to clone. The success of cloning cats can provide reference for the cloning of rare and endangered species such as giant pandas.

　　Reporter Zhang Xuan

Since the establishment of the "Midnight Surprise" unit in 2017, Shanghai International Film Festival has always been well received by fans. Series, series and other batch of film approval lists make fans scream again and again. The "Midnight Surprise" unit of this year’s Shanghai International Film Festival will bring an alternative horror party, with not only English thrillers but also the restored version of legendary horror films, which will once again let the audience enjoy a frightening journey in the dark cinema!

　

The list of "Midnight Surprise" units includes: Psyche, which won the best feature film award of Fuchuan Choice Award at Fuchuan International Fantasy Film Festival; Phenomenal campus horror film classic "Scream"; Zarava, which won the International Film Critics Week Award at the Venice Film Festival in 2021; Gorgeous visual retro thriller "fright night in Soho District"; The latest Japanese horror film "May Everyone Have Happiness" premiered in Shanghai International Film Festival. Let’s take a look at the specific introduction.

　

Psychic medium

2021

Aspect: whether it is a god or a demon, psychics are also big.

　

Banjong pisonthanakun ("Ghost"), the great director of Thai horror movies, is the latest hit, and the Korean director () is the producer. The film tells the story of a documentary team visiting all parts of Thailand to learn about the life of shaman. When they plan to shoot a female shaman, the nightmare begins. Based on animism, Banzhuang depicts the painful secret history behind a family step by step in the way of mockumentary through follow-up, interviews, surveillance videos, etc., and shows the super-scale supernatural horror phenomenon intuitively from zero distance. By blurring the boundary between ghosts and gods, the 30-minute exorcism scene presents a chilling doomsday carnival. Won the Best Feature Film Award of Fuchuan Choice Award of Fuchuan International Fantasy Film Festival.

　

Scream in fright

1996

Aspect: Phenomenological school horror film classics.

　

The master of horror film directed the story of Sydney, a girl from a small town high school, who found the real murderer who killed her mother in a serial murder case. The film combines the classic scenes of American horror movies, which not only plays with the series created by craven himself, but also makes a reversal on the basis of innovation, especially the 12-minute opening phone threatening paragraph, which makes horror movie fans crazy. At a low cost of $15 million, the film earned a global box office of 170 million, which became the first masterpiece of the revival of campus horror films in the 1990s. Since then, five authentic sequels have been derived, and there are countless parodies and Asian horror films copied from this film.

　

Zarava

2021

Aspect: a rare Iranian horror film

　

There have been many bizarre deaths of villagers in remote villages, and the officers in charge of the investigation and mysterious exorcists were involved. Is it because of demon possession or collective unconscious madness? Director Asalam Amiri wrote and directed a feature film debut, with a chilling prop — — The empty glass jar unfolds the story, and the plot reversal comparable to "Crying" is started around "whether the devil exists in the jar". Covered with exorcism stories and folk culture, the film alludes to the social subversion brought about by the Islamic revolution in Iran with conflicting characters, exposing the complexity of faith and the fragility of modernity. Won the 2021 Venice Film Festival International Film Critics Week Award and the parallel unit Fabisi Film Critics Award.

　

Fright night in Soho District

2021

Aspect: gorgeous visual retro thriller

　

Inspired by classic horror films and his yearning for London, the fashion capital of the 1960s, the British director made this retro-style horror film. The film tells that Alois, who came to London to study, had hallucinations in her old apartment, as if she had traveled to the 1960s and witnessed a murder. Wright imitated the gorgeous visual style of lead and yellow movies, cooperated with a large number of rock songs of that year, and pushed suspense and reversal to a climax in the gorgeous psychedelic scene. The most colorful passage in the film is the scene of two women and a man dancing together. With the subtle camera movement and the position of two actresses, it creates a god-synchronized effect that makes computer stunts sigh.

　

May everyone have happiness

2023

Aspect: Japanese horror movie awards, the first crown, the extended edition, the world premiere

　

Adult granddaughter came back from Tokyo to visit her grandparents in the countryside, but she always felt something strange at home, and eventually she would face the cruel truth of completely subverting her cognition. In 2021, Kakukawa founded Japan’s first film collection competition "Japan Horror Film Award" for horror films. The first winner was Shimoju Youtai’s short film "May Everyone Have Happiness", and then he made this award-winning work into a cinema feature film. The film is supervised by the chairman of the jury of the award and the master of horror movies who has created such classic works, and recently starred by high-profile actresses. With the theme of "everyone’s happiness is based on the sacrifice of others", the director explores the chilling dark nature behind the so-called happiness through the unconstrained setting, bringing unforgettable horror experience to the audience. The film has not been released in Japan, so the screening of Shanghai International Film Festival will be its world premiere, which is also the first time that the "Midnight Surprise" unit has ushered in the world premiere.

　　have/reap a bumper/copious/rich harvest

　　Less than a month before the 2023 college entrance examination, the college entrance examination work was put on the agenda. On May 9, the Ministry of Education and relevant departments held a video conference on the safety of the 2023 national college entrance examination. The Minister of Education made arrangements for the 2023 college entrance examination, emphasizing the prevention of cheating on mobile phones as the top priority of this year’s college entrance examination.

　　This year’s college entrance examination is the first one after the Covid-19 epidemic, which means that the epidemic has little impact on the college entrance examination, and we will concentrate on the "safe college entrance examination". One of the arrangements for the "Safe College Entrance Examination" is to strengthen comprehensive management, and preventing mobile phone cheating is the top priority of this year’s college entrance examination security. To this end, the Ministry of Education emphasizes that mobile phones cannot be brought in, used or sent out.

　　The reason why preventing mobile phone cheating is the top priority of college entrance examination security is because everyone has a mobile phone today. If the prevention is not strict, the mobile phone will easily become a cheating tool. More importantly, in recent college entrance examinations, although it is explicitly forbidden for candidates to bring wireless communication devices such as mobile phones into the examination room before the college entrance examination, and metal detectors are supplemented during security inspection, and various measures are taken to shield wireless signals, mobile phone cheating cases still occur.

　　For example, in the college entrance examination in 2021, a candidate in Hubei illegally brought his mobile phone into the examination room. In the examination, he hid the mobile phone under the draft paper to shoot questions, and distributed it to a training institution to seek answers at the beginning of the examination. In the college entrance examination in 2022, a candidate in Gansu illegally brought his mobile phone into the examination room. After the examination, he took the test paper and sent it to QQ group for an answer. These events have aroused social concern and affected the reputation of the college entrance examination.

　　The college entrance examination is a life test for the majority of candidates. Only a standardized college entrance examination order can ensure the fairness of the college entrance examination. Although the mobile phone cheating in the above cases failed to achieve the goal, it still revealed that the security of the college entrance examination seemed to be well deployed, but in fact there were some loopholes. In order to maintain the fairness and justice of the college entrance examination, preventing mobile phone cheating has been mentioned in an important position in this year’s college entrance examination.

　　The so-called "no entry" is to strengthen the security inspection of test sites and prevent candidates from bringing their mobile phones into the examination room from the source. If the security personnel of the test center are serious and responsible for their work, and with the help of advanced technology such as metal detectors, candidates with mobile phones can be found in time and prevented from entering the examination room.

　　"I can’t use it" means to strengthen the responsibility of the invigilator in the examination room. Even if candidates carry their mobile phones through the security clearance, they will not have the opportunity to use them in the examination room, which is a supplementary defense against possible security omissions. "Unable to transmit" means to improve and upgrade the wireless signal shielding equipment, so that even if candidates use mobile phones in the examination room, they cannot achieve the purpose of obtaining answers.

　　In order to maintain the order and fairness of the college entrance examination, this year, the safety of the college entrance examination was clearly defined, and specific requirements were put forward to form a "full chain" supervision at the test sites. The effect is worth looking forward to. First, "taking the prevention of mobile phone cheating as the top priority of the college entrance examination this year" is a shock to candidates with cheating tendency. Second, this will further compact the supervision responsibility of the three links and ensure that mobile phone cheating cases will not appear.

　　However, considering that the total number of candidates is likely to exceed 10 million this year, the number of candidates in some provinces has increased, and the idea that individual candidates still cheat on mobile phones is not ruled out. At the same time, considering that there are as many as seven or eight thousand test sites in the national college entrance examination, it is not excluded that there are omissions in the security inspection of individual test sites. In addition, there are hundreds of thousands of college entrance examination rooms every year, and there are more than one million invigilators, not to mention the negligence of invigilators.

　　After the Ministry of Education emphasized that preventing cheating on mobile phones should be the focus of this year’s college entrance examination security, all localities must make further detailed arrangements to truly pursue secrecy and prevent one from being sparse. There are still more than 20 days before the college entrance examination. I hope that all relevant departments at all levels, the person in charge of each test center and each invigilator can make full preparations, strictly perform their duties and responsibilities, guard the discipline and fairness of the college entrance examination, and hand over satisfactory answers to the majority of candidates and the public.

　　Photo courtesy/vision china

Not long ago, Tesla crashed into the tank 300. Although it was finally characterized as "misoperation", it still caused many people to vomit about Tesla’s single pedal mode. But in fact, Tesla’s models still have brake pedals, and the "single pedal mode" that many people on the Internet spit out is actually a spit on Tesla’s "kinetic energy recovery technology", or more specifically, a spit on Tesla’s cancellation of the "kinetic energy recovery mode strength adjustment function".

What is the single pedal mode?

From the clutch, brake and throttle of manual transmission to the brake and throttle of automatic transmission, and then to the new energy vehicle, the car can be controlled only by the switch. In the propaganda of some new energy vehicle manufacturers, we can see such things: the single pedal mode not only changes the driving mode of the owners, but also changes the sense of anxiety and leg fatigue when driving in urban congestion.

The single pedal mode was originally a technology used in racing cars. As the name implies, the acceleration and braking operations of vehicles were completed by one accelerator pedal. Of course, the single pedal mode of a normal private car actually has two pedals, one accelerator and one brake. Step on the accelerator to accelerate, release the accelerator to slow down, and use a pedal to realize the functions of acceleration and deceleration. In the new energy vehicle, the single pedal mode represents the kinetic energy recovery technology, which recovers energy by loosening the throttle and then carries out a reverse charging.

Advantages and disadvantages of kinetic energy recovery

Kinetic energy recovery technology can effectively extend the battery life and increase the cruising range of new energy vehicles, at the same time, it can also reduce the fatigue of the owner’s leg and relax the other foot. But from another point of view, the change of driving habits brought about by the simplification of driving mode also has great security risks.

Different from the three-pedal driving mode of manual transmission to the two-pedal driving mode of automatic transmission, although the clutch pedal operation is missing, the acceleration and braking operations are still independently operated, while the single-pedal mode, although the brake pedal is still effective, gives priority to encouraging the owner to rely on the accelerator pedal to complete the acceleration and braking operation. In the single pedal mode, only sudden braking requires stepping on the accelerator, while the rest of the deceleration is completed by loosening the accelerator, and the strength depends on "habit". In case of an emergency, it is easy for some car owners to make mistakes. Should we use a loose pedal or a brake to slow down?

Fortunately, the single pedal mode of most private cars can decide whether to use the kinetic energy recovery function by adjusting the deceleration of the throttle. At one time, many Tesla owners adjusted the deceleration of the single pedal mode to the minimum to get the experience equivalent to the double pedal. Similarly, the kinetic energy recovery function in this mode is basically equal to nothing.

What is Tesla’s problem?

Tesla’s problem is that it cancels the "adjustment of kinetic energy recovery", which is equivalent to directly depriving users of their right to choose, so that all Tesla owners can only use "high kinetic energy recovery", that is, mandatory single pedal mode. Although the brakes are still there, not all Tesla owners like the driving experience of single pedal mode.

summary

Tesla’s cancellation of the dynamic adjustment function of "kinetic energy recovery" is obviously not good for the owner. It not only cancels the option of new owners, but also makes new owners get used to the single pedal mode, which increases the learning cost and the risk of misoperation, and also reduces the driving experience. The so-called relieving leg fatigue in single pedal mode has no practical significance, because as long as there is a brake pedal, your left foot can’t leave the brake pedal. Since the posture will not change, how can you relieve leg fatigue?

But for Tesla, there are many benefits to canceling this function. That is, it cultivates users’ habits and increases the learning cost for users to choose other brands; It can also reduce the CRBS function. After the compulsory kinetic energy recovery, the battery life of Tesla models will also be enhanced, which can be said to be harmless. Many people think that this is a reason for Tesla to cancel the dashboard, which is entirely based on cost saving, not on consumer experience, just like Apple’s mobile phone cancels the charger for environmental protection. What do you think?

Editor’s Note: 2022 is the year of the 20th National Congress of the Communist Party of China and the centenary of the founding of the Communist Youth League of China. A nation will prosper only when its young people thrive If the younger generation has ideals, skills and responsibilities, the country will have a future and the nation will have hope. Red Net Moment News will launch the column "Strugglers are Youth" from now on, telling how the contemporary youth passed the torch of a century of youth, and what kind of youthful blood and passion they used to meet the party’s 20 th victory.

Xin Yang, Professor and Doctoral Supervisor, School of Electrical and Information Engineering, Hunan University.

Red Net News Reporter Liu Zhixiong Zhu Liping Intern Hu Xinghai Changsha Report

If the integrated circuit field represented by CPU is the "brain" of modern equipment, then the power semiconductor chip is the "heart" that provides power. After returning from Cambridge University, Xin Yang, a professor at the School of Electrical and Information Engineering of Hunan University, devoted himself to the research of power semiconductors. He wanted to build "China Core".

"Our country was 30 years behind in this respect and was stuck in the neck for too long." Xin Yang said with emotion.

Xin Yang’s concern about power semiconductors stems from a teacher’s words during his undergraduate period. "Power semiconductors are the core of electric energy conversion, and a generation of power semiconductor chips determines the performance of a generation of equipment." It also originated from Xin Yang’s "China Heart". Since childhood, parents have taught Xin Yang to be an indispensable talent for the country.

Previously, the research results of the subject with Xin Yang as the first author were published in a top international academic journal of physics. This achievement provides a new idea for solving the serious oscillation problem of new power semiconductor.

"This achievement can give full play to the advantages of fast switching speed and low loss of the third generation semiconductor devices, which is of great significance for the development of high power and extremely high power density converter equipment." Xin Yang introduced.

Semiconductor components used in experiments in Xin Yang.

Power semiconductors are widely used, ranging from high-speed trains to mobile phone chargers.

"Almost everything involving electric energy conversion requires the participation of power semiconductors." Xin Yang said, "But our country once lagged far behind Europe in power semiconductor devices including IGBT (Insulated Gate Bipolar Transistor)."

IGBT has long been monopolized by developed countries. In 2009, in order to learn advanced semiconductor knowledge, Xin Yang studied for master’s degree and doctor’s degree in Imperial College London and Cambridge University.

During his stay at Cambridge University, Xin Yang firmly decided to return to China in contact with CRRC Zhuzhou Institute and related companies. "Many of our own technologies are not advanced, so we have to look at others’ faces. That feels terrible. " Xin Yang said, "At that time, I felt that the country urgently needed this technology, and it was time for me to realize my self-worth and serve the motherland."

Yang Xin takes students to work in the laboratory.

In 2015, Xin Yang returned to his native Hunan from Britain. In 2018, he was hired as a professor and doctoral supervisor at the School of Electrical and Information Engineering of Hunan University. Hunan University’s relatively complete incentive system for young teachers and the free and open academic environment at the foot of Yuelu Mountain have given Xin Yang great impetus.

In recent years, Xin Yang has presided over or participated in several national scientific research projects, published more than 40 high-level papers and applied for more than 20 invention patents.

"I went out with an initial intention to study for my country. After I came back, I felt that the country, especially Hunan, attached importance to talents. Only by redoubling efforts and making achievements can we live up to the expectations of the party and the people." During the conversation, Xin Yang said many times that he wanted to contribute to the country’s breakthrough in key technologies.

In Xin Yang’s view, his academic achievements can not be separated from the support of relevant national policies. He was selected into the relevant national talent plan, and his learning experience in the team of Luo An, an academician of China Academy of Engineering, also benefited from the Hunan Young Talents Support Program.

Xin Yang is with his students.

Nowadays, the importance of chips to modern industry is becoming more and more prominent, and talents are the key to technological leadership. Xin Yang pays special attention to the matter of taking students, and his latest research results include many master students. "Academician Luo An has given me a lot of help. As a teacher, I should also teach my students what I have learned without reservation. The happiest thing is that my students are better than me academically."

In the next six months to a year, Xin Yang will focus on building a new reliability evaluation method for power semiconductors. "At present, the evaluation of power semiconductors is still relatively extensive. We hope to reach the degree of calculation reliability and know the service life of IGBT components more accurately, and then deduce more advanced and reliable power semiconductor packaging technology."

In addition to constantly pursuing the optimization of chip performance indicators, looking to the future, Xin Yang wants to make some subversive achievements in originality theory. "Time is still tight." Xin Yang ridiculed his increasingly backward hairline. After devoting himself to scientific research, Xin Yang almost had no entertainment activities. "But doing research with students is very happy, and I don’t feel tired when I work overtime."

"I hope that when the country stands at the forefront of the world in the field of power semiconductors one day, I can be proud to have contributed a little to it." Xin Yang said.