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　　Beijing, August 14 (Reporter Shangguan Yun) The Qixi Festival has arrived. Have you figured out how to send blessings to others? Have you chosen a gift for your lover? Recently, similar issues have become a hot topic on the Internet.

　　In recent years, Tanabata is a lively festival. Merchants from all walks of life hope to make a fortune by taking the opportunity, while couples are busy giving gifts to each other and thinking about blessing copywriting. There are also singles who laugh at themselves as "not suitable for holidays".

　　How much do you know about this festival?

　　Is it appropriate to say happy holidays to singles?

　　The present Qixi Festival is also called "China Valentine’s Day".

　　As early as it has not yet arrived, many people have made careful preparations: couples exchange gifts and wish each other a happy holiday, making this festival extremely warm.

　　At the same time, some people laugh at themselves for "two delays in love career", which is not suitable for festivals; Considering the love theme of the festival, some people make fun of it. Don’t say "Happy Holidays" to singles, which is a double blow.

　　Wang Juan, a folklore expert, explained that Tanabata is rich in connotation, including begging for cleverness, begging for children, tying a red rope and so on, which is far more than just love. In ancient times, there was no unified way of blessing in the whole country, so we had to talk about the matter.

　　"For example, if you treat it as Valentine’s Day, you will wish it everlasting; When the girl’s adult ceremony is over, I wish the girl what she wants, and what kind of blessing to send, generally depends on the needs of both sides. " She said.

　　Of course, on Tanabata, you can also say happy holidays. Wang Juan believes that singles can use this festival to express their love, and those who don’t want to celebrate this festival don’t have to. It is a very romantic festival in itself, so don’t give yourself so many restrictions.

　　Not just love.

　　Indeed, earlier, Tanabata had little to do with love. The spread of the story of the Cowherd and the Weaver Girl has something to do with the ancient people’s observation of the actions of Vega and Altair.

　　According to ancient records, at that time in July evening, Vega just rose to the highest point of the year, which was clearly visible. In addition, the two dark stars next to Vega look like an opening to the east, and when you look to the east, you can see the "Altair".

　　Later generations, the connotation of Tanabata gradually enriched. Begging with needles, for example, started in Han Dynasty, and is especially popular among women. The gameplay is very simple. They wear the needle in the competition. The faster they wear it, the more "cleverness" they beg for, and the success of threading the needle is "skillful".

　　There is also a game called "floating needle trick". The girls will prepare a basin of water one day in advance and put it in the courtyard, and there will be floating dust on the water the next day. Then, the girls put the needle in and observe the projection of the needle after the sun comes out.

　　In addition, according to folklore, July 7th is Kuixing’s birthday, and scholars who want to achieve fame will make sacrifices on Tanabata to pray for their success in the exam.

　　In the Song and Yuan Dynasties, there was also a "Qiqiao City". The festive food on Tanabata is called "proper fruit", which is mainly made of oil, flour, sugar and honey. It is called "laughing tired of children" and "fruit eating pattern" in Tokyo Dream of China Record.

　　Constantly enriched festival connotation

　　Besides, Wang Juan once mentioned that in ancient times, one of the main contents of Chinese Valentine’s Day was begging for cleverness, so most unmarried girls celebrated this festival. In some areas, this day is a rite of passage for girls.

　　For a traditional festival, its connotation, customs and so on would have been enriched and developed with the passage of time. In modern society, inheriting beneficial customs also needs to be linked with daily life.

　　Therefore, as far as Tanabata is concerned, some experts suggest that we can start with the details, such as girls can still hold similar handicraft competitions and let children do proper fruit, which can also encourage young people to pay attention to and participate in this festival.

　　"It only takes a few lines of code to build a regression model." Programmers recognize the performance of Google AutoML and think that the model designed by AutoML is comparable to that designed by machine learning experts. A few days ago, Google engineers introduced the Google AutoML project in China and Silicon Valley respectively.

　　Confused doubts followed — — AI evolved again? ! Already self-developed? Can control their own evolution? Is it to get rid of humans?

　　How many steps does evolution take?

　　AI has indeed evolved, and it can do more and more things and achieve remarkable results. Behind it is the "triple jump" of AI implementation path — —

　　Zhao Zhigang, a researcher at the Big Data R&D Department of Jinan Center of National Supercomputing, said: "At first, we used mathematical formulas and ‘ if… … then’ Wait for the statement to tell the computer what to do in the first step and what to do in the second step, teach it by hand, and then give the machine N groups of inputs and outputs. The rules or laws in the middle are learned by itself. "

　　"Before, many smart minds spent their whole lives studying how to extract effective features." Mo Yu, CTO of Smart Point, which focuses on intelligent shopping guide dialogue robots, explained, "The invention of neural network algorithm and the emergence of deep learning technology have made AI evolve to 2.0, and the work of extracting features is carried out by AI itself, and our work has also changed accordingly."

　　It is easy to explain the transition from "1.0" to "2.0" with the model of mathematical function: if the tasks of image recognition, semantic understanding and chess playing are all regarded as different Y=f(X), that is, the input picture, voice or chess move of "cat" is "x", and the output cat, answer and chess move is "y". Before deep learning, people find the formula corresponding to function F through their own analysis and tell it to AI. After deep learning, people input a lot of correspondence between x and y, and AI finds the formula corresponding to function f by itself.

　　"The specific content of the function F found by AI may be better than that found by humans, but humans don’t know it, just like a black box." Mo Yu said, "But the form of F is designed by AI researchers through research. If deep neural network is used, the modules in the network and the organization between modules are also designed in advance."

　　With the maturity and popularization of deep learning technology, there has been a specific pursuable experience in model construction. "The release of various common neural networks has made the threshold for employment lower and lower. Some ordinary model construction and optimization, just graduated students can get started in online learning tutorials. " Zhao Zhigang said.

　　When modeling becomes a learnable skill, AutoML appears. What it can do is the model design work of AI researchers. "It will help different companies build artificial intelligence systems, even if they don’t have extensive expertise." Google engineers recommend this. AI successfully evolved to 3.0.

　　In fact, AutoML still replaces the work that human beings can extract experience. "If people described a set of ‘ Road network ’ With the technical assistance of deep learning, the machine can find the optimal path as quickly as possible; Then AI can now design its own road network. " Zhao Zhigang was concise.

　　It can be seen that both deep learning and AutoML only replace the work that some groups of human beings have studied thoroughly. "What machines can do, try not to work by hand" is the life creed of many programmers, which gave birth to AutoML. Based on the same creed, Microsoft developed DeepCoder. "It can be used to generate programs that satisfy given input and output." Mo Yu said, but its performance is not satisfactory at present, and only some simple programs can be written.

　　Who is "God"

　　There is no doubt that the answer is human.

　　Since AI has evolved to a higher level of model design, what changes have taken place in the "hand of God"?

　　"An alchemist", Mo Yu vividly talked about his work in two words. "Smart is a professional intelligent customer service. The work of R&D personnel mainly focuses on problem modeling (how to turn actual problems into problems solved by artificial intelligence technology) and algorithm optimization (how to improve the effect of artificial intelligence algorithms)."

　　"refining" means constant debugging and improvement. "For a specific person, the more you throw your temper, the better. The more accurate the answer, the better." Mo Yu said, "Our X is the customer’s question, Y is the reply of the robot customer service, and the middle function F needs training."

　　This is not an easy task. If we divide the experience of human society into three categories: definite rules with formulas, knowledge that can be expressed in words, and feelings that can only be understood but cannot be expressed. The last category is the most difficult to ponder.

　　"Therefore, we try to build a perfect closed-loop feedback, understand the preferences of specific users, and finally achieve what they like through the expression of emotions and interests." Mo Yu said, "At present, it is in the stage of man-machine collaboration, but the acquisition of more and more samples will help our intelligent customer service to give accurate and pleasing answers."

　　It can be seen that not all fields are suitable for AI’s self-development. For example, in the aspect of problem modeling, how to abstract practical problems into machine learning problems can not be completed by AI. In the stage of AI2.0, R&D personnel also need to design the form of function F manually.

　　So, what will be the future of AutoML popularization?

　　"Humans are liberated from lower-level jobs." Zhao Zhigang said, "If the model design can be done by AI, then AI researchers will explore more the design of the basic modules that make up the model."

　　"Developing AI models with AutoML is similar to children playing with ‘ Lego ’ Toys. " Zhao Zhigang put it in simple terms, and the designers of Lego disassembled the whole world into detailed modules, so that everything could be used and then combined into complex models. The higher level of human work is to find basic units, that is, modules, for AI in different fields. For example, in the field of image recognition, humans have designed various modules such as convolution and pooling. "AutoML can build a model based on this, and constantly adjust the module combination to obtain a more reasonable output. The finer the module, the more versatile it can be, and the more self-developed AI can be used. " Zhao Zhigang said.

　　Extended reading

　　 Where are the talents needed by the industry?

　　Alleviating the shortage of talents is the main selling point of AutoML. "AI systems are blooming everywhere, but AI talents are far behind." Google explains why AutoML is indispensable. What is the current status of AI talents?

　　In 2017, the Global AI Talent Report and the BAT Artificial Intelligence Talent Development Report were released one after another. "The shortage of AI talents is real." Xu Wenjuan, vice president of Shengshi Investment Group, said, "The shortage of talents in start-up and development enterprises is particularly serious. From the current global perspective, the United States has the largest number of AI talents, and China’s AI talents can’t be compared with it in terms of number of people and experience. "

　　Zhao Zhigang has the same feeling: "China’s AI field is short of veterans, experts, generalists and top masters." The optimization and debugging of the model requires experience, the exquisite design of the model requires superb skills, and the application of AI in various industries requires compound talents. In addition, there are only a handful of top talents leading the development direction of AI, and most of them are abroad.

　　Xu Wenjuan introduced that China has the most AI talents in BAT (Baidu, Ali, Tencent). Generally, there are several kinds of background experiences of such talents, such as returnees, BAT work experience, or from universities or research institutes.

　　"AI self-development should not be able to replace people’s work in the short term, and there is still a long way to go." Xu Wenjuan said. Zhao Zhigang analyzed from an academic point of view: "Only when human beings design AI models in different application fields and further decompose them into a series of general modules, such as the periodic table of elements in chemistry, DNA and RNA in biology, can this self-development have more applications."

Southern Finance March 18th, afternoon media,gameThe plate continues to rise,Gravitation communication、Zheshu culture、Wentou holding、Dianguang communicationWaiting for the daily limit,WANDA CINEMASApproaching the daily limit,Huayi Brothers、Huace movie and television、Longban communication、Zhongguang natural selectionWait for it to rise. In the news, this timeNVIDIAThere are 11 speeches related to GTC2024, and 34 speeches related to media and entertainment, which mainly focus on the following aspects: 1. Generative AI aided development and film and television production; 2. Wensheng map, Wensheng video model, and other AI applications; 3. 3D content generation; 4. Create games in the cloud.

　　　　　　 CCTV News:Together with skateboarding, rock climbing and surfing, break dancing has become an official event of the Olympic Games. A few days ago, when IOC President thomas bach announced this decision, it really caused quite a stir. When it comes to break dancing, friends over 40 must have special feelings. In the 1970s and 1980s, break dancing became popular in China. No matter the streets and alleys, as long as the dynamic music rang, there were young people with explosive heads, bell bottoms and open-fingered leather gloves, while stepping on the spacewalk, cleaning the glass with their bare hands and dancing with each other, showing their youthful vitality. In many variety shows at present, break dancing is even more cool, and the limelight is the same.

　　　　　　 [After all] What kind of dance is "Olympic" break dance?

　　　　　　 Break dancing, English name Breaking, is sometimes translated as "floor dancing" because of its classic movements on the ground. From leading the trend of street culture to becoming an official Olympic event, what kind of dance is break dancing?

　　　　　　 Hold the ground with one hand, exert your strength instantly, and your body will fly and spin rapidly. The young man who danced like a tornado and looked wild and free was 20-year-old Shang Xiaoyu. As the only break dancer in China, he played in the 2018 Youth Olympic Games, competing with the world’s top players, and finally broke into the top eight.

　　　　　　 Break dancing originated from American hip-hop culture in the 1960s and 1970s, and it is a kind of generalized hip-hop. Its symbolic action is that dancers support their bodies with their hands and heads to do rapid rotation and tumbling on the ground, which has the elements of sports competition since its birth, and street cheers are the basis for judging the success or failure of fighting dancing. In 1987, the American film "Break Dance" was released in China, and it was all the rage to take a "spacewalk" with a tape recorder on your shoulder or "clean the glass" in the air. However, these movements are not break dancing.

　　　　　　 Su Jie, Secretary-General of China Sports Dance Federation: "The break dance in the movie is the predecessor of breaking now."

　　　　　　 According to experts, the most obvious feature of break dancing is that athletes are no longer satisfied with expressing music with their bodies, but pursue to explore the limits of the human body in rhythm, and Thomas and handstand rotation have become symbolic movements.

　　　　　　 [Question in the end] There are various forms of street dance. Why can break dance "enter the Olympics"?

　　　　　　 As a competition, break dancing made its debut at the Youth Olympic Games in Buenos Aires in 2018, which also played an important role in promoting its official entry into the Olympics. There are many forms of street dance, so why can break dance "enter the Olympics"?

　　　　　　 Su Jie, Secretary-General of China Sports Dance Federation, said: "One of the strong characteristics of break dancing is that it is very competitive. The form of competition generally appears in the form of fighting dance, that is, one-on-one PK, and the criteria for judging are relatively clear, so it can be the official event of the Olympic Games first."

　　　　　　 In China, break dancing has also become the only dance in the street dance competition of the 2nd Youth Games held in 2019, and China break dancing has officially entered the preparation stage for the 2024 Paris Olympic Games.

　　　　　　 Experts believe that dance presentation, music understanding, dance culture interpretation and innovation may be the scoring points of break dancing after entering the Olympics.

　　　　　　 How to form a national break dance team?

　　　　　　 The reporter learned from the China Sports Dance Federation that the formation of the national break dance team for the 2024 Paris Olympic Games has started, and talent selection has begun. At the same time, the preparation and selection plan has also entered the revision stage and is expected to be announced to the public in the first half of 2021. How to form the national team of break dancing? In particular, everyone is very concerned about whether those stars who are good at break dancing will also have the opportunity to enter the national team.

　　　　　　 Su Jie, secretary-general of China Sports Dance Federation, said: "We will decide who can be selected into our large talent pool by comprehensive standards, not whether he is an performing star or a person engaged in a certain profession. We are based on sports performance."

　　　　　　 According to reports, it takes two steps to form a national team of break dancing. First, a talent pool is established by extensively selecting talents in the whole society, and then the national team candidates are finally determined through a competitive selection mechanism.

　　　　　　 Su Jie, Secretary General of China Sports Dance Federation: "Now the selection method has entered the revision stage, and then it will be reported to the relevant departments for review, and finally we will announce it to the whole society. The announcement time is probably before the first half of next year. "

　　　　　　 [After all] Is everyone suitable for break dancing?

　　　　　　 The door of the national break dance team is open to the whole society. Are you also moved? It is estimated that many parents will be busy letting their children practice again. Is it suitable for everyone to break dance? What should we pay attention to when engaging in this sport?

　　　　　　 In the face of zero-based reporters, Shang Xiaoyu only selected a few simple warm-up professors, but the reporters still found it difficult to control.

　　　　　　 Wang Hong, a professor at Beijing Sport University and a member of the "Source News" expert database of the China Association for Science and Technology, said: "Many movements really violate some concepts of traditional sports training, and the risk of injury is great. Some movements of flexibility and explosive force may be harmful to a child who does not grow well, to the development of his bones or to his ligaments, for example, to the lumbar spine. If children and young people want to do this kind of action, you must first practice basic physical fitness and special physical fitness before you can rise to the level of technical training. "

　　　　　　 Shang Xiaoyu, the only player of the China team in the break dance event of the 2018 Youth Olympic Games, said: "Don’t always focus on these rotations and difficult movements. In fact, breaking is more interesting in its dance."

　　　　　　 [After all] Although break dancing is cool, can everyone try it?

　　　　　　 Finally, I would like to remind you that although break dancing is cool, its difficult movements such as tumbling, handstand, head turning and Thomas require very high strength, flexibility and coordination. Don’t try rashly if you don’t have a certain physical quality. Especially parents and friends, all want to build a handsome baby, but break dancing is fierce and difficult, and it is not suitable for children who are too young to learn, so as not to get hurt.