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There’s a reason for playing billiards too badly. The exclusive cheats teach you how to clear the table with one shot.

"Source: Institute of Physics, Chinese Academy of Sciences"

Whether table tennis is good or not depends on fate, and some people believe in "making great efforts to make miracles".

Some people think that through constant practice, they can naturally master those wonderful hitting angles and achieve perfection.

Do you know how hard I work?

But in fact, the way of hitting the ball and the trajectory of the table tennis game contain rich knowledge of mathematics and physics. This knowledge controls the trend of table tennis, and you can also become a master of table tennis by mastering these theoretical knowledge.

Essential knowledge 1: sine theorem

If we regard point A as a white ball, point B as a target ball and point C as a hole, how can we achieve the goal?

At this time, understanding the sine theorem can help you find the best goal plan. The formula of sine theorem is as follows:

In this formula, r is the radius of the circumscribed circle of the plane triangle ABC.

Essential knowledge 2: cosine theorem

Similarly, in any triangle in the above picture, the rational use of cosine theorem formula can also help you find the best scheme to hit the ball B into the hole C with the white ball A.

The cosine theorem is as follows:

Essential knowledge 3: reflection theorem

As shown in the above figure, red is the initial motion line of the ball, blue is the reflection line of the ball, the gray rectangle can be regarded as the edge library of the table, and the purple midline is the normal vector in the middle of the interface, so the following hypothetical figure can be obtained:

Through this reflection pattern hypothesis, we can better imagine the trajectory of the ball after hitting the library.

Essential knowledge 4: collision principle

① Frontal collision (completely elastic)

After the collision of two objects, the kinetic energy and momentum of the system are conserved, and there is no additional energy conversion.

The conclusion is:When the two balls have the same mass, the speed of the two balls will be exchanged after a completely elastic ideal frontal collision.

② frontal collision (totally inelastic)

Inelastic collision means that a part of the kinetic energy of objects is converted into internal energy before and after collision, while completely inelastic refers to converting kinetic energy into internal energy as much as possible, that is, two objects move at the same speed together.

③ Actual collision

The actual collision is a mixture of completely elastic and completely inelastic collision. If the velocity of the two balls is defined as V1,1, V2, 1 after a complete elastic collision; Before the collision, the speed of the two balls was V1,0, V2,0, and the recovery coefficient of the resin material used in billiards was k (the recovery coefficient of good materials was k≈1), so there were:

When k=0, it is completely inelastic collision, and when k=1, it is completely elastic collision. For an actual collision problem, the transformation of velocity and internal energy after two balls collide can be expressed by k, which is specifically expressed as:

In addition, it includes image vector decomposition; General situation and special situation of two-dimensional collision; Rigid body dynamics; Rotational inertia and rotational energy: rotational inertia of homogeneous sphere, law of rotation; Friction: a series of necessary knowledge points such as static friction, sliding friction and rolling friction …

Aiming technique

After a long and boring basic theoretical knowledge, you must be a patient and persevering table tennis enthusiast, and you also have the theoretical basis for learning more skills. Then if you want to master the secret of how to hit the ball in actual combat, aiming technology is the main content to be learned next.

I believe everyone understands a truth. When we observe an object, the closer it is to us, the bigger it will look. If it is farther away from us, it will look smaller. In fact, the actual size of the object has not changed. This is the so-called visual effect.

The visual effect will affect our judgment on the size of the cue ball, thus affecting our aiming angle.

So when we aim at close range, we will subjectively think that the ball looks big, while it looks small at a distance.

Then there are two problems that need to be discussed: first, the influence of the cue ball getting bigger on the thickness of the shot; Secondly, how much will the distance between the center of the cue ball and the goal point and the center of the target ball make the cue ball look bigger?

First of all, we will explain the impact of hitting thickness after the cue ball becomes bigger as shown in the above figure, which shows the maximum overlapping thickness of the two balls, the big gray circle is the size of the cue ball after it becomes bigger, the radius is, the small circle is the original size of the cue ball, the red ball is the size of the target ball, the radius is, and the maximum overlapping radius of the small gray circle and the red circle is, so there are:

The second question has the following explanation about the distance between the cue ball and each ball center. As shown in the above figure, D represents the distance between the cue ball and the goal point, and the distance D0 between the cue ball center and the target ball center, and the angles α and β, then the relationship between the variables can be obtained as follows:

Walking technique

Finally, let’s talk about the topic that everyone is most interested in, which is also the advanced skill of table tennis game-walking technique. Walking technology is to control the motion track of the cue ball by hitting different positions of the cue ball.

0：Center pole/fixed pole, ideally, the cue ball will only slide without any rotation.

1：High/heel/topspin, cue ball rotates forward, which has following effect after collision.

2：Low shot/shrinking shot/backspin ball, cue ball rotates backward and travels backward after collision.

3&4：Side plugs, 3 and 4 represent the left and right respectively, and the cue ball rotates to the right and left respectively after the shot, which can change the rebound angle of the cue ball after hitting the library.

5：Left plug, the effect is the superposition of high pole and left plug.

6：Upper right plug, the effect is the superposition of high pole and right plug.

7：Left lower plug, the effect is the superposition of low rod and left plug.

8：Lower right plug, the effect is the superposition of low rod and right plug.

A：Stearns followed, and the distance followed after the cue ball hit the target was shorter than that followed by the high pole.

C：Stern retreats, and the distance that the cue ball retreats after hitting the target is shorter than that of the low pole.

B&D：Stensey, the cue ball changes direction after hitting the target.

By hitting the above position of the cue ball, the corresponding cue ball movement effect can be achieved.

After learning so many high-end knowledge and formulas, let’s get rid of the old concept of "making great efforts to make miracles". Many people always keep the same strength to hit the ball, which is not desirable. The strength of hitting the ball should be changed at any time with different situations. This requires long-term practice to accurately grasp the strength of the shot that should be adopted at different angles.

The above is the explanation of the formula and technology related to this table tennis game. Dear table tennis lovers, remember the formula and practice hard. "Clear the table with one shot" is not a dream!

END

Audit: Zhu Guangsi, member of Beijing Popular Science Writers Association.

Reprinted content only represents the author’s point of view

Does not represent the position of Institute of Physics, Chinese Academy of Sciences.

Source:Tadpole staff

Editor: Garrett

Reporting/feedback

Let outsiders see jokes, no! Making this big country’s heavy weapon is to fight for making it in China.

　　CCTV News:There are representative major projects and major projects in each era, and those super projects have become the symbolic symbols of the times, which embodies the hard work and creativity of the people of China and also witness the road of China’s revival and rise.

　　Shield machine is a necessary equipment for tunneling, and it is also a high-end equipment focused on "Made in China 2025". At one time, the technology and overseas market of super-large diameter shield machine have been monopolized by western countries for more than a century. In May this year, the super-large diameter shield machine independently developed by China will go abroad for the first time and become a new "national business card" for China.

　　In May, this super-large diameter shield machine with a diameter of 12.12 meters and a weight of 2,200 tons is about to leave for Bangladesh. Although it is the weekend, the manufacturing team is still making the final confirmation of the export shipment plan.

　　For Zhang Boyang, the person in charge of this shield machine, it is not the first time that there is no weekend. The shield machine exported this time is not the most difficult project he took over. At the same location, they once manufactured the first super-large diameter shield machine with independent intellectual property rights in China — — "Tianhe", with a diameter of 15.03 meters and a weight of 6,500 tons, was used to excavate the Yangtze River tunnel in Nanjing at that time.

　　Zhang Boyang, head of CCCC shield machine project: "This was the most difficult geology in the world at that time. It was soft on the top and hard on the bottom. If it was all hard, it would be easy and even."

　　Zhang Boyang is the commander of Nanjing Yangtze River Tunnel Project. At that time, only one foreign company in the world had experience in manufacturing shield machines with similar conditions, and the construction party planned to order two shield machines from this company.

　　Zhang Boyang, head of CCCC shield machine project: "700 million one, two 1.4 billion, no price reduction. You can’t rely on others to import all the time. Once they wean you from food, you will die, so we are determined to make it ourselves. "

　　It’s better to throw off your arms and do it yourself than to cry your head off and beg for help. A big country’s heavy weapon must be in its own hands. As an engineer of this project, Zhou Jun was mainly responsible for research and development.

　　Zhou Jun, Chief Engineer of CCCC Shield Machine Project: "The pressure is enormous. Everyone thinks it is incredible, and there are doubts outside."

　　In the process of research and development, many technical problems appear for the first time, so we can only cross the river by feeling the stones. The research and development of core components has made everyone think hard.

　　Zhou Jun, Chief Engineer of CCCC Shield Machine ProjectThe cylinder is the core component of the shield machine, and the shield machine moves forward by the thrust generated by the cylinder. Before that, they were all imported from abroad. Our super-large diameter shield cylinder is a luxury car, 500,000 yuan each. "

　　Tianhe needs about 50 such cylinders. In order to realize the localization of core components, the R&D team made great efforts and made up their minds to gnaw this hard bone.

　　Zhou Jun, Chief Engineer of CCCC Shield Machine ProjectWe employees are the earliest to get off work at 11 pm. I basically go to work after 7 o’clock in the morning and get off work around 1 o’clock, every day. Through four to five months of experiments, we have come up with a set of manufacturing inspection standards for large-diameter shield cylinders. "

　　After nearly half a year of technical research, the domestic shield cylinder finally came out, and the cost of one cylinder was 300 thousand yuan cheaper than that of imported cylinders. A super-large diameter shield machine consists of tens of thousands of parts of different sizes. Behind every domestic part is hard work. The research and development of Tianhe has been designed, modified, tested and revised thousands of times. There are more than 7,000 drawings confirmed in the final design of the whole equipment, which are more than one person high when stacked together.

　　Zhou Jun, Chief Engineer of CCCC Shield Machine Project: "Everyone thought the same thing as me at that time, that is, we built these two machines. At that time, China should be said to be the shield machine with the most advanced technology, the largest diameter and the highest difficulty. Everyone had this sense of accomplishment at that time, that is, this kind of glory for the country, this kind of courage, including this spirit, that is to say, since I have done this, I must do it well. "

　　After 14 months of hard work, in July 2012, China’s first super-large diameter shield machine "Tianhe" was officially put into use, and the two shield machines saved nearly 800 million yuan for the country. However, can this shield stand the test of super engineering?

　　Zhang Boyang, head of CCCC shield machine project: "The most painful thing was in 2013, when the cutter head got stuck. Just a few days before the Spring Festival, I didn’t leave the construction site for half a step, and I stayed in the shield machine for observation and analysis every day. "

　　The cutter head suddenly stopped turning during the excavation of the Yangtze River tunnel, and these 59 days were the most difficult days for everyone.

　　Zhang Boyang, head of CCCC shield machine project"This is not only an enterprise, but also the pressure from China people. You let foreigners see Chinese jokes. This pressure is really huge, even if you cut my meat. "

　　After a long period of hard thinking, Zhang Boyang made a bold suggestion.

　　Zhang Boyang, head of CCCC shield machine project: "I retreated the cutter head and shield body of this integral shield machine, which is technical and has never been seen before. But I also evaluate and analyze what risks it has, how to retreat, and how much strength it needs. I use the telescopic mechanism and oil cylinder of the cutter head, and every time I retreat 10 mm, 10 mm, that’s all. "

　　After two months of persistence, the cutter head finally turned again. In July, 2015, after three years, Tianhe came out of the hole at the bottom of the river and saw the light again. Many people present cried with joy.

　　Zhang Boyang, head of CCCC shield machine project: "Without responsibility, there is no innovative spirit. You dare not take responsibility, do you dare to innovate? We are not willing to do this. How can China’s manufacturing industry develop? "

　　Tianhe has achieved 50% localization rate, and the localization rate of shield machines to be exported to Bangladesh has increased to 95%. It will be used in China’s largest overseas shield road tunnel project, and help the country’s "Belt and Road Initiative".

Go to the grassroots in the Spring Festival and stick to it for a better reunion —— A note on the New Year’s Eve run of Shenzhen Express Takeaway Brother

　　Xinhua News Agency, Shenzhen, January 22nd Title: Stick to it for a better reunion — — Shenzhen Express Takeaway Brother’s New Year’s Eve Running List

　　Xinhua News Agency reporter Zhao Ruixi

　　In the early morning of New Year’s Eve, Yang Lei went out on his electric car and was busy collecting and dispatching parts in several communities in Shenzhen Nanshan Science and Technology Park. This is his 17th year as a courier. He can’t remember how many times he received the delivery on New Year’s Eve. "After working as a courier, he didn’t go back to his hometown for the New Year."

　　On the morning of January 21st, at the gate of the residential area to be delivered, Yang Lei moved the boxes of express delivery out of the car. (Photo by Xinhua News Agency reporter Liang Xushe)

　　"My wife and two children are in Shenzhen. Many younger brothers’ families are not around, giving them the opportunity to go home. " Yang Lei said, "The company will also give rewards for going to work during the Spring Festival, and give compensatory time off after the holiday. My wife works in a supermarket and also works during the Spring Festival. Both children are in junior high school, they can understand us, and they can also heat their own meals and take care of themselves. "

　　This year, SF Express, where Yang Lei is located, set up a special incentive package and warm-hearted care activities for the Spring Festival totaling more than 400 million yuan to encourage employees to stick to their posts.

　　Yang Lei told reporters that the peak of receiving and dispatching parts is before the Spring Festival, and the workload during the Spring Festival is not too heavy. He, who is usually responsible for receiving and dispatching office buildings, went to support the receiving and dispatching work of residential quarters during the Spring Festival. In the four hours in the morning of New Year’s Eve, he received more than 80 tickets. "Under the superposition of various incentives, the Spring Festival can earn more than 10,000 yuan this month."

　　On the morning of January 21st, Yang Lei (former) was busy sorting express delivery. (Photo by Xinhua News Agency reporter Liang Xushe)

　　Near noon, Yang Lei was almost busy with the delivery task in the morning. At this time, Shen Jinfeng, a takeaway rider in Longhua District, got busy and rode his electric car between the restaurant and the community.

　　In 2021, Shen Jinfeng joined the US Mission and became a full-time takeaway in Longhua Minzhi District. He said: "Takeaway is an industry with more work and more rewards. As long as you are willing to pay, you will get a reward." In order to earn more money, he has chosen to stay alone in Shenzhen to deliver meals during the Spring Festival for two consecutive years.

　　Meituan has invested more than 500 million yuan this year as a subsidy for riders to stabilize their posts during the Spring Festival, including the subsidy for staying in the post, the red envelope for starting the Spring Festival, the red envelope for duty, and the subsidy for stepping back to work.

　　On New Year’s Eve, there were not many take-away orders. Until 1 pm, Shen Jinfeng sent out a total of 10 takeaways. "Although there are not many orders, the delivery fee per order is much higher than usual. I earned more than 9000 yuan in the Spring Festival last year. This year’s Spring Festival will get all kinds of rushing rewards, and you can earn more than 10,000 yuan. " Shen Jinfeng said, "earn more money and go back to your hometown in Anhui on the fifteenth day of the first month to reunite with your family."

　　In addition to strengthening the incentive mechanism for enterprises, the government has also taken action. Years ago, the relevant departments in Shenzhen made it clear that the express delivery and take-out during the Spring Festival would be subsidized by the municipal finance for each order in 1 yuan. Front-line workers in construction, tourism, sanitation, manufacturing and other industries can also receive corresponding government subsidies.

　　"Although the Spring Festival is not around my family, I am very happy to deliver the meal to the guests in time so that they can have a hot meal and have a happy year." Shen Jinfeng said.

　　Yang Lei said that nowadays, the society generally recognizes the courier brother more. During the Spring Festival, it is still relatively happy to ensure that residents receive the needed items in time and have a good year. "A package sent every day conveys a love." He said.

　　They are the epitome of tens of thousands of little brothers who stay deep in the post during the Spring Festival, contributing to the better reunion of others and working hard for their own better reunion. Shen Jinfeng said: "I believe that the good days are still behind!"

How do senior three students prepare for the exam when the countdown to the college entrance examination is less than 100 days？

　　This year, the number of college entrance examination candidates in China is expected to exceed 10 million. Weng Tiehui, Vice Minister of Education, said at the press conference of the joint prevention and control mechanism in the State Council on February 28th that the Ministry of Education will carefully study the implementation plan of this year’s college entrance examination, and relevant work arrangements will be announced to the public in time. The reporter found out that since the resumption of the college entrance examination, the college entrance examination has never been rescheduled for any reason. Even during the SARS period, the original plan was still implemented, one month ahead of the previous year, and it was carried out normally. According to the usual arrangement, the 2020 college entrance examination will officially enter the 100-day countdown on February 28th. How to stay in the sprint stage and get rid of the adverse effects caused by the epidemic has also become a challenge that this year’s senior three students must go all out to face.

　　Recording and broadcasting lectures, live answering questions, opening the "online teaching" mode in the third grade of senior high school.

　　Wang Yi, director of the third grade of Wuchang Experimental Middle School in Hubei Province, told the reporter that the "online preparation" model carried out by the school has been going on for more than a month due to the epidemic.

　　Wang Yi said: "We started our holiday on January 20th. We originally planned to start classes on February 1st, the eighth day of the first month, and the winter vacation lasted for 10 days. Due to the sudden outbreak, online teaching has become a routine mode. Before that, to be honest, most of our teachers, including myself, taught online ‘ Zero foundation ’ . I thought at that time, I would take advantage of the winter vacation to explore. I had a holiday on January 21st, and I started to broadcast live on the Internet on the 22nd … …”

　　With the development of the epidemic situation, in late January, the Ministry of Education announced that schools all over the country should "close classes without stopping studying", integrate online learning resources according to their own reality, enrich learning content, and provide suitable home learning methods for candidates.

　　Wang Yi led the team to take action formally. He introduced: "On the fifth and sixth day of junior high school, I suggested to the school to hold a video conference through QQ group to let the teachers get familiar with the operation. After four or five meetings, everyone gradually became proficient, brainstorming and communicating with each other, and this kind of teaching channel was gradually established. "

Interactive screenshot of online teaching feedback in Class 5, Grade 3, Wuchang Experimental Middle School, Hubei Province

　　Designated e-mail to send and receive grading homework, mobile phone applet to conduct quizzes, and online simulation exam to test learning results … … After two weeks of exploration, the online teaching feedback mode in this special period has been continuously enriched and improved.

　　Li Huisuo, secretary of the Party Committee and president of Hebei Hengshui School, introduced in an interview with CCTV News 1+1 that Hengshui School has taken three measures to help senior three students prepare for the exam: 1. All the students participate in student management: a teacher subcontracts several students for video home visits and individual counseling to keep abreast of their situation; 2. Expand the content of education in an all-round way: the cultural class adopts the way of combining recording and broadcasting teaching with live answering questions; Physical education class arranged gymnastics suitable for family exercise; Carry out labor education classes and let students do some housework. 3. Highlight inspirational education in the whole process: record inspirational theme class meetings and inspirational micro-videos to keep students energetic.

　　Parents of online exams and home exams turned into "invigilators"

　　From January 30 to February 11, the teaching and research staff of senior three in Wuhan began to develop and revise the February research examination questions in Wuhan online, and completed the online and offline versions of 9 sets of papers. On February 26th, relying on the Wuhan Education Cloud Platform, the city’s senior high schools were organized to carry out the online quality testing of senior three English subjects, and the feasibility of online quality testing of senior three English subjects was studied and analyzed, which also provided a practical basis for the online quality testing of senior three English subjects in Wuhan in the future.

　　Su Min, the educational director of Wuhan No.11 Middle School, said: "We have designed an online exam, which is called the heart-taking exam, to make students transition from the loose state of holidays to the tense state of study as soon as possible. There is a weekly test once a week to test the learning state of the week. There is a monthly exam once a month to understand the learning status of the whole month. Teachers can fully understand students’ learning situation through testing and adjust their own teaching. Students can also check for gaps and make timely adjustments, and at the same time, they can also conduct sufficient exercises to hone their skills, speed and mentality. "

The cloud system invigilation of Guangqumen Middle School in Beijing

　　On March 3rd, the first adaptive test of Beijing New College Entrance Examination was held. Affected by the epidemic, more than 50,000 candidates took the "home exam" for four consecutive days.

　　According to the different conditions of each school, the test papers reach the candidates by flash mail, on-site collection by parents, and self-printing by mailbox extraction. Because this test needs candidates to be conducted at home, parents become "invigilators". In order to ensure the effectiveness of the test, schools let parents receive "cloud" training before invigilation through online counseling and "A Letter to Parents" before the test. 15 minutes before each exam, parents remind students to empty their desks, prepare school supplies, mute electronic products such as mobile phones, prepare test papers, answer sheets and barcodes for the subject, and issue instructions such as "The exam is about to begin, please confirm that electronic products such as mobile phones are mute". After the exam is completed, submit the answer sheet by mail or sending pictures according to the requirements of middle school.

　　Psychological micro-courses and expert lectures relieve stress and boost morale.

　　In the past, the "countdown to the college entrance examination" hanging above the blackboard in the classroom can only "move into" the class groups of online platforms such as QQ and WeChat. Without the teacher around, the pressure and anxiety of many students have increased.

　　Xi Huisuo, secretary of the Party Committee and president of Hebei Hengshui School, said that the college entrance examination is a big competition of comprehensive strength, which not only tests knowledge and ability, but also tests students’ psychological quality, will quality, behavior habits and physical health. In a special period, children are prone to anxiety at home, and even have some problems with their parents. At this time, psychological counseling becomes very important. To this end, Hengshui has arranged a special psychological teacher to record psychological micro-courses, and students can watch them on demand according to their own wishes.

　　武汉市十一中学教务主任苏敏介绍：“我们请了专家对学生进行讲座，讲一讲学生如何结合自己的情况应对这种压力。同时还邀请了一些专家，主要是讲时间管理、励志教育、学习方法、生涯规划，包括心理调适。因为网上学习遇到的问题很多，而且大家不见面，我们就用这样的方式不断地调整学生的心态、方法，对他们进行激励，学习的动力就能够始终保持。”

武汉市十一中学公众号“高三学生抗‘疫’留言簿”截图

　　不仅如此，苏敏的团队还充分利用早自习时间和新媒体方式鼓舞学生们的士气。苏敏说：“我们的老师每天早自习会安排一个学生说一段激励大家的话，我们还把它做成了公众号——高三学生抗‘疫’留言簿。科任老师平时在评语中也不断督促、引导和激励学生。”

The first place in Jiangsu liberal arts missed Qingbei. Do you understand the admission rules of the new college entrance examination？

　　[Editor’s note] The candidates with the highest score in Jiangsu liberal arts are not allowed to go to Qingbei Nanda because their history subject level is B+. Many people said that they could not understand the current college entrance examination. In fact, in Jiangsu’s current "3+2" recruitment model, Tsinghua of Peking University has been asking for double A or above for many years. But this will be the last year for Jiangsu to use the old model. Jiangsu will implement the new college entrance examination plan next year. 澎湃 Mathematics course took Zhejiang, the first batch of reforms, as an example last year, sorting out the long examination course and 35 subject choices of the new college entrance examination. In a blink of an eye, Zhejiang sent out four new college entrance examination students. With minor adjustments and small patches, local reforms were rolled out one after another, and the reform ideas disassembled in this paper were basically continued.

　　In our second and third year of high school, we may have experienced many exams and model exams, but the college entrance examination is only in June of the third year of high school, so it is also called "one exam will set you for life". However, in today’s high schools in Zhejiang, students of Grade Two begin to prepare for the academic proficiency test early, which may become the first record that affects college admission.

　　The second year of high school started the college entrance examination, and it took two years to pass the "test"

　　Du Yiming, 19, is a senior three student in a first-class key middle school in Zhejiang Province. In addition to the number of words, Du Yiming chose physics, chemistry and biology as college entrance examination subjects. His college entrance examination began in November of the last semester of Senior Two.There are more key exams, and "every time matters, you can’t relax every time".

　　Du Yiming took part in the "first college entrance examination" of four subjects: biochemistry and foreign languages in November last year. On the first weekend of April this year, he will take part in the "second college entrance examination" for selected subjects. The results of the materialized students in these two exams will be included in the total score of the college entrance examination according to the grade assignment. By the time of the national college entrance examination in June, Du Yiming will face an exam beyond the number of languages. There is only one chance to get Chinese and math scores, and the foreign language scores will be included in the total score according to the actual test scores, based on the foreign language test results in November last year.

　　When the national candidates finished the college entrance examination in early June, Du Yiming was greeted by the "Trinity" exam of Zhejiang University. For Zhejiang candidates, if they want to sprint to some top universities in China, such as Peking University and Tsinghua, it is best to take the "Trinity" exam which is put forward by these universities in mid-June. In the end, the results of this exam will be combined with the scores of six subjects in the college entrance examination and the scores of earlier academic level exams to form the admission transcripts in proportion. Such a "trinity" admission quota may account for more than 80% of the admission channels of these colleges and universities; If candidates intend to enter the above-mentioned colleges and universities solely by the results of the college entrance examination, it is not impossible, but it also means giving up many opportunities automatically.

　　Du Yiming’s tense preparation schedule is not an isolated case. Compared with the traditional college entrance examination mode of "one exam determines life", the new college entrance examination reform in Zhejiang has undergone tremendous changes.

　　To sum up, there are probably three new features:

　　1. Cancel the division of arts and sciences, and use the new rule of "three subjects must be tested except the number of languages, and the other subjects should be selected from 7";

　　2. Foreign languages and elective subjects are provided with 2 examination opportunities, and the highest score is included in the total score of the college entrance examination, and the elective subjects are graded according to the ranking;

　　3. Not limited to the unified entrance examination, the "Trinity" enrollment scale of universities directly under the Ministry of Education in and outside the province has expanded.

　　The road to the new college entrance examination is full of choices besides hard work.

　　Option 1: Customize your own exam schedule.

　　Every candidate has a dense examination schedule in his hand. Different from the traditional "one exam for life" model, each exam in the above table may affect the final admission.

　　Do you want to participate in the "Trinity" enrollment? How many times do you need to take the exam? How many courses do you take each time? For these questions, candidates need to customize their own examination schedule according to their own situations and goals.

　　If we take the recruitment path of the general college entrance examination, it will affect the admission of two rounds of elective examinations and the college entrance examination of three subjects other than languages. As for the academic examination, as long as we "pass the exam", it will do.

　　If you take the "trinity" recruitment path, all the above exams will affect the admission: you need to get as many As possible A’s (accounting into the "trinity" total score) in the academic exam, take two rounds of elective exams and the college entrance examination outside the language number, as well as the "trinity" in-school test of your favorite university.

　　At present, there are 57 colleges and universities participating in the "Trinity" enrollment in Zhejiang, including 49 colleges and universities in the province and 8 colleges and universities directly under the Ministry of Education. Tsinghua University, Peking University, Shanghai Jiaotong University, Fudan University, Zhejiang University and China University of Science and Technology all participate in the "Trinity" enrollment.

　　According to the information released by Zhejiang Education Examinations Institute, there are 8,690 "Trinity" enrollment plans for colleges and universities in Zhejiang Province this year, and the "Trinity" enrollment brochures for colleges and universities outside the province and directly under the Ministry of Education have not yet been released, with 1,664 students last year. Since the enrollment plan for the general college entrance examination in 2019 has not been announced, if we refer to the 231,000 college entrance examination enrollment in 2018, the ratio of the two enrollment numbers is about 1:23, and the proportion of the "Trinity" in all enrollment can not be underestimated; It is even more important to occupy more than 80% of the enrollment in some colleges and universities.

　　Option 2: 35 combinations of courses, which three subjects to take?

　　After the reform of Zhejiang College Entrance Examination, seven subjects were arranged and combined, and 35 different ways of selecting subjects were derived.

　　The Paper (www.thepaper.cn) found a general administrative class of "Chemistry+Biology" graduated from a first-class key middle school in Zhejiang Province in June 2018, and recorded the decision of 57 students in this class to choose subjects.

　　By comparing the ranking of each student in six large-scale exams in high school for three years, we find that it is very reasonable.Students should first consider the dominant subjects when choosing subjects.. Hao Chenfei, a teacher of the school, said: "Even if there is more room for some subjects in the future, students still choose subjects with their own advantages."

　　In this class, we found that eight students chose three subjects with the best grades in Grade One.

　　Such new rules may help some candidates to "overtake in corners".

　　We find out two all-round academic tyrants and two partial scientific tyrants in our class for comparison. The results of all-round academic tyrants in every subject in Grade One of Senior High School are in the top 20% of the year, and the total scores of seven subjects rank the highest. The scores of the subjects selected by the partial science tyrants are all in the first 20% of the year, but the other subjects are relatively backward.

　　Let’s look back at the distribution of the scores of the all-round academic tyrants and the partial scientific tyrants in the first year of high school. The scores of these four students in the selected subjects are relatively close, but judging from the total scores of seven subjects, the all-round academic tyrants are completely ahead of the partial scientific tyrants:

　　By choosing subjects, the partial science master got rid of the inferior subjects, narrowed the distance with the all-round learning master, and even surpassed the all-round learning master in the final ranking. According to the grading method, we convert the ranking percentage of the above four students in the six large-scale exams from Grade One to Grade Three into grading, and illustrate the performance curves of these students. If you only look at the two exams in senior three, you can’t even judge who is the all-round academic tyrant and who is the partial scientific tyrant.

　　In this class, there are also students who do not choose the dominant subjects completely according to their personal rankings.

　　The reason for this phenomenon may be that candidates consider choosing a major in the future. Li Zirui, a senior three student in this school, became interested in computer programming in his freshman year. In order to further his studies in computer science in the future, he "chose physics almost without hesitation when choosing a subject".

　　Option 3: How to foster strengths and avoid weaknesses under the customized rules of colleges and universities?

　　The new college entrance examination rules also provide colleges and universities withMore recruitment autonomy.

　　On the one hand, unlike in the past when there were only two types of students in arts and sciences, there are more targeted requirements for students to choose examination subjects when enrolling students in various majors in colleges and universities. For example, Peking University’s astronomy and psychology majors require candidates to choose subjects that contain physics; The majors of finance and finance in Renmin University of China require candidates to choose subjects containing history or physics; Zhejiang University’s humanities experimental class is not limited to elective subjects.

　　According to Zhejiang Education Examinations Institute, in 2019, 6.8% of the subjects required for the examination were one, 8.8% were two, 23.3% were three and 61.1% were unlimited. Compared with 2017, in 2019, some colleges and universities put forward more explicit requirements for the selected subjects for majors with clear training requirements and high correlation with the subjects studied in middle schools, while those with broader basic literacy requirements appropriately relaxed the scope of the selected subjects.

　　On the other hand, the "Trinity" comprehensive evaluation enrollment channel has been widened. Colleges and universities can organize on-campus tests more independently, screen students and select the best candidates through written tests, interviews and physical tests.

　　Take eight universities outside Zhejiang Province and universities directly under the Ministry of Education in 2018 as an example. The total number of students enrolled by these top universities in Zhejiang through the college entrance examination is 1,696 (including 1,618 from Zhejiang University), while the number of students enrolled through the "Trinity" is 1,664, which is close to 1:1 in overall scale.

　　If Zhejiang University is stripped off, the number of people recruited by other top universities in China through the "trinity" comprehensive evaluation has far exceeded the enrollment of the college entrance examination. In other words, if you are a fresh graduate and want to be admitted to the above seven top universities, the safest plan is to participate in the "trinity" comprehensive evaluation enrollment of these schools; Otherwise, when the college entrance examination is filed, even if there is a very good college entrance examination result, the enrollment places of these top college entrance examinations are few and far between. Take last year’s enrollment plan as an example.Tsinghua University enrolled 8 students in Zhejiang through the college entrance examination and 105 students in Zhejiang through the Trinity. Peking University enrolled 23 students in Zhejiang through the college entrance examination and 85 students in Zhejiang through the Trinity.

　　In addition to broadening the enrollment channels, colleges and universities also have greater initiative in the on-campus testing stage, and can screen candidates in multiple dimensions such as written test, interview and physical fitness test.

　　Taking the written test as an example, in the "Trinity" comprehensive evaluation test of top universities in China, physics, as a "sharp weapon" for screening candidates, has become a compulsory subject for most candidates. Even if the candidate’s college entrance examination subject is not physics, he may be examined in the written test on campus. According to Tsinghua University’s "Trinity" Comprehensive Evaluation Admissions Guide for Zhejiang Province in 2018, in the on-campus test, 77.1% of the candidates were examined in physics during the written test.

　　Peking University’s "Trinity" comprehensive evaluation is similar. Regarding the written test content of college tests, Peking University’s 2018 Zhejiang "Trinity" comprehensive evaluation enrollment brochure stipulates that there are five written test subjects, of which three subjects are required to be tested, and two are selected from the four subjects of "physics, history, chemistry and politics", requiring "physics".

　　In 2014, Du Yubo, then Vice Minister of Education, used four "most" words to describe the reform of the new college entrance examination: "This examination enrollment system reform is the most comprehensive and systematic reform since the resumption of the college entrance examination, and it is the most important and complicated reform in the comprehensive education reform".

　　In a blink of an eye, Zhejiang New College Entrance Examination has sent out two students. In 2019, senior high school students are about to sprint the college entrance examination in June and become the third graduates of the new college entrance examination. In the process of implementation, minor adjustments are still taking place in Zhejiang.

　　No matter the front-line teachers and students or the education reform experts, there is no agreement on how to deal with this zero-sum game. In a broader sense, it remains to be seen where the college entrance examination reform in China will go.

　　At the request of the interviewee, the teachers and students in this article are all pseudonyms.

[Network rumors] Beidaihe network rumors into the lottery station

In order to further improve the masses’ ability to identify rumors, consciously resist online rumors, and jointly safeguard the clearness of cyberspace, recently, the Network Information Office of Beidaihe District Committee entered the lottery station to carry out online rumor propaganda activities.

By distributing leaflets, answering questions on the spot, etc., the activity publicized the contents such as online rumors and online reports, and sent a "big meal" for the majority of lottery players, and encouraged lottery players to actively participate in reporting harmful information, resist online rumors, and consciously surf the Internet according to law, in a civilized way and rationally.

Original title: "[Network rumors] Beidaihe network rumors into the lottery station"

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＂Stability＂ is still the key word of the real estate market (Rui Caijing)

　　On September 17th, the National Bureau of Statistics released the statistical data of the changes in the sales prices of commercial housing in 70 large and medium-sized cities in August this year. In August, the prices of new commercial housing in 55 cities rose month-on-month, 5 cities less than that in July. The picture shows a real estate for sale in Rugao, Nantong, Jiangsu. Photo by Wu Shujian (People’s Vision)

　　On September 17, the National Bureau of Statistics released statistics on the changes in the sales prices of commercial housing in 70 large and medium-sized cities in August 2019. Overall, in the month of August, whether it was new commercial housing or second-hand housing, the cities with rising prices were 55 cities and 43 cities respectively, and the number dropped significantly compared with last month. Analysts pointed out that although the traditional sales season of "Golden September and Silver 10" is approaching, the overall stable situation of the local property market has continued, which on the one hand reflects the effect of regulatory policies, and on the other hand reflects that the positioning of "houses are used for living, not for speculation" is profoundly changing the development pattern of the real estate market.

　　The overall situation continued to be stable.

　　According to Peng Kong, chief statistician of the Urban Department of the National Bureau of Statistics, according to preliminary calculations, the sales prices of new commercial housing in four first-tier cities increased by 0.3% month-on-month, which was the same as last month, with Beijing rising by 0.5%, Shanghai rising by 0.3% and Guangzhou and Shenzhen both rising by 0.2%; It rose by 4.2% year-on-year, and the growth rate dropped by 0.1 percentage point from last month. The sales price of second-hand houses was flat month-on-month, rising by 0.3% last month, of which Beijing fell by 0.4%, Shanghai and Guangzhou were flat, and Shenzhen rose by 0.2%; It fell by 0.2% year-on-year, which was the first decline since June last year. The sales prices of new commercial housing and second-hand housing in 31 second-tier cities increased by 0.5% and 0.2% respectively from the previous month, and the growth rate dropped by 0.2 percentage points from the previous month. It rose by 9.9% and 5.5% respectively year-on-year, and the growth rate dropped by 0.8 and 1.2 percentage points respectively from last month.

　　At the same time, in August, the sales price of new commercial housing in 35 third-tier cities rose by 0.7% month-on-month, the same as last month; It rose by 9.0% year-on-year, and the growth rate dropped by 1.2 percentage points from last month. The sales price of second-hand houses increased by 0.8% month-on-month, with an increase of 0.1 percentage point over the previous month; It rose by 5.8% year-on-year, and the growth rate dropped by 1.3 percentage points from last month.

　　According to Yan Yuejin, the research director of the think tank center of Yiju Research Institute, due to the recent cooling of the housing transaction market, the tightening of the real estate financing environment, and the tightening of the funds in place for housing enterprises, housing enterprises in various places have taken the initiative to reduce prices and promote sales, which has led to a narrowing of the growth rate of the housing price index in 70 cities across the country. At present, the property market is entering a cooling channel, especially in second-tier cities, which has a positive effect on stabilizing housing prices in second-tier cities and preventing real estate speculation by borrowing talents from all over the world.

　　The policy supports "housing and not speculation"

　　The real estate market continues to remain stable, which is inseparable from the strict control of policies. Zhang Dawei, chief analyst of Zhongyuan Real Estate, said that from the central bank to China Banking and Insurance Regulatory Commission, the risk control of real estate finance has been intensively strengthened, and various financing channels from real estate mortgage to housing enterprises have been tightened to varying degrees.

　　The central bank recently reformed and improved the formation mechanism of the loan market quotation rate (LPR) to further reduce the financing cost of the real economy. In this process, in order to resolutely implement the positioning of "houses are used for living, not for speculation" and the long-term management mechanism of the real estate market, ensure the effective implementation of the regional differentiated housing credit policy, and keep the interest rate of individual housing loans basically stable, the central bank has simultaneously adopted "the shortest repricing period is one year", "the interest rate of commercial housing purchase loans shall not be lower than the quoted market interest rate of the corresponding term loans plus 60 basis points" and "the interest rate of two sets of commercial individual housing loans shall not be lower than the quoted market interest rate of the corresponding term loans plus 60 basis points".

　　The relevant person in charge of the Ministry of Housing and Urban-Rural Development said that it will speed up the promotion of housing security legislation, clarify the top-level design and basic institutional framework of housing security at the national level, consolidate the responsibility of housing security at all levels of government, and provide a legal basis for regulating the access and use of affordable housing.

　　"In recent years, the whole society has become more and more deeply aware of the return of real estate to residential properties, and the intensity and resilience of real estate regulation and control policies have become greater and greater. Recently, while releasing funds to reduce the financing cost of the real economy, the financial authorities have also made structural arrangements specifically to avoid capital flowing into the real estate market. It can be said that the persistence of real estate control policies and the establishment of a long-term mechanism are playing an increasingly obvious role. " Yi Cong, a professor at the School of Economics of Tianjin University of Finance and Economics, said in an interview with this reporter.

　　Take the initiative to get rid of "real estate dependence"

　　At the recent press conference held by the State Council, Shen Xiaoming, Governor of Hainan Province, said that for a long time, Hainan’s real estate accounted for about 50% of investment and 50% of tax revenue, and its economy relied heavily on real estate. However, real estate needs land, which will increase the environmental load, while Hainan’s land resources are getting less and less, and the environmental load also has a "ceiling". Therefore, economic development cannot be sustained by real estate.

　　“1— In August, under the background that the real estate sales area decreased by 52%, the real estate sales decreased by 50%, and the national tax reduction and fee reduction, the regional GDP of the whole province increased by 5.4%, and there was no economic ups and downs caused by real estate regulation. It is expected that by the end of the first quarter of next year, the downward pressure on the economy caused by the downward adjustment of old kinetic energy will be basically released, and the dividends generated by new kinetic energy will gradually accumulate. Therefore, we expect Hainan’s economy to enter a benign and rapid development track at the end of the first quarter of next year. " Shen Xiaoming said.

　　Yi Cong said that adhering to the regulation policy of the real estate market and ensuring the healthy development of the real estate market is not to stop developing the real estate industry, but to make the real estate development and the development of the real economy complement each other and provide support for people to live and work in peace and contentment, entrepreneurship and innovation.

　　Deng Yusong, deputy director of the Institute of Market Economy of the State Council Development Research Center, said that the demand caused by the demolition of old houses, the influx of new population and the shrinking of families is normal, and the subsequent demand will be affected if more demand is released in the short term. Deng Yusong predicted that the situation of concentrated demand release and hot sales in small and medium-sized cities like in the past two years could not last for a long time.

The session will not fall! Changan automobile won the double honor [self-reliance through science and technology ＜ 44 ＞]

On the evening of January 28th.

Central radio and television main station

The 4th China Automobile Fengyun Festival Awards Ceremony

Held at Beijing National Gymnasium.

At this grand ceremony

Changan Automobile Global Design Team, Aouita 12

They were awarded "Pioneer Design Team of the Year"

"Best Intelligent Driving"

Won two honors

Fully demonstrated Changan Automobile.

Hard core strength in the field of design and products

It is understood that

"China Automobile Fengyun Festival" is sponsored by the Central Radio and Television General Station and specially planned by the Financial Program Center of the General Station, aiming at the China automobile market, to select the annual outstanding models with strong products, market guidance and future development trends for consumers, and is known as the "wind vane of the automobile industry".

As the most authoritative event in the domestic automobile industry, it has been held for four consecutive years, and Changan Automobile has never failed.

In 2020 China Automobile Fengyun Festival, Changan Automobile CS75PLUS won the "Best Intelligent Networked Car of the Year".

In 2021 China Automobile Fengyun Festival, Changan Ford EVOS won the "Best Smart Car" and a new generation of Lincoln navigator NAUTILUS won the "Best Power Car".

At the 3rd China Automobile Fengyun Festival, Changan Automobile Force Electric won the "Special Award of Jury" and Deep Blue SL03 won the "Grand Prize of Jury".

Original title: "The session does not fall! Changan automobile won the double honor [self-reliance through science and technology < 44 >].

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The ＂Youth League Year＂ is on fire. What is it？ People outside this province are shocked!

Coordinate Jiujiang, Jiangxi Province, there is a League Year, which is a ceremony for the whole village, old and young, to worship their ancestors collectively in the ancestral temple. Strictly speaking, it should be the moment when the ugly time meets at midnight on the 30 th, and the year ends and the new year opens. Last year ended, so it is also called "the end of the year". However, the word "finished" is taboo in customs (meaning finished), and Tujili is more called "the year of reunion" (a year of complete reunion). In the development of time, slowly, some still insist on holding this ceremony in the middle of the night, some change it to the evening, and some change it to the early morning (it has reached the first day). My village is more interesting. This ceremony is held in the morning of the 30th instead of the evening.

Under the lens of Glory V30 PRO, take you to experience a different Christmas.

[PConline professional evaluation] jingle, jingle, jingle. When this song started, my first reaction was that Christmas was coming. As one of the most influential festivals in the west, everyone will carefully decorate a huge Christmas tree as a facade, dress up as Santa Claus to give gifts to children, and let the joy continue at the last minute of this year.

And in Guangzhou, which place has the most Christmas holiday atmosphere? Therefore, after a series of searching and exploring, we came to the famous buildings in Guangzhou, Sacred Heart Cathedral and Tianhui Square. Of course, there is also the glory V30 PRO that you carry with you. Under its lens, it will take you to take a different Christmas.

Record video all the time:

First stop: Shishi church

Guangzhou Shishi Sacred Heart Cathedral, located in Yide Road, Guangzhou, officially opened the foundation stone laying ceremony on June 18th, 1863. Guangzhou Shishi Sacred Heart Cathedral is the largest Catholic church in the suburbs of Guangzhou, and it is also one of the only remaining Gothic buildings with two minarets in China.

The stone church is also one of the only four Gothic church buildings with all-stone structure in the world, and was listed as a national key cultural relic protection unit in 1996.

Let’s take a look at the photo proofs of the glory V30 PRO stone church. The Matrix camera multi-dimensional camera matrix of Glory V30 PRO consists of a 40-megapixel Sony IMX 600 main camera, a 12-megapixel focus plane and an 8-megapixel telephoto lens. Let’s provide richer shooting techniques when shooting the stone church, and with the help of AI scene recognition function, the picture will be more colorful.

In the aspect of ultra-wide-angle camera, Glory V30 Pro uses 12 million focus plane, supports 109 ultra-wide-angle photography, and has 1.4μm super-large photosensitive pixels, which makes the picture wider and deeper.

Second stop: Tianhui Square

Just after the trip to Shishi Church, we came to Tianhui Square, the holiest place for punching cards in online celebrity. IGC of Tianhui Plaza, which opened just over a year ago, has gathered nearly 200 fashion brands to settle here.

Let’s take a look at the shooting picture of Glory V30 PRO. This Sony IMX 600 sensor with a main camera of 40 million pixels does not have the traditional RGGB arrangement, but adopts a brand new RYYB arrangement. Using RYYB super-photosensitive arrangement, the incoming light of the sensor can be increased by 40%, reaching the maximum limit ISO； of 409,600. With the oversized F/1.6 aperture, let the glory V30 PRO shoot Christmas at night, making the beautiful scenery more natural and transparent.

F/1.6 super-large aperture, coupled with RYYB arranged sensors, combined with AIS handheld super night view function of glory V30 PRO, not only can you get photos with little noise and slight smearing feeling, but you can still control the quality of the picture and control the bright part, so that the picture can still glow at night.

Especially for the changeable lights, as long as the right shutter timing is found, not only can the brightness of the instantly highlighted lights be ensured to be appropriate, but also the details of the picture can be kept more, and the brilliance is naturally rich, so that night shooting is no longer a problem.

In addition to the excellent super-sensitive AI three shots, the glory V30 PRO also has a combination of 32 million high-definition main shots and 8 million super wide angles. Support intelligent beauty algorithm, automatically fill the light, even in the dark, through the portrait super night scene mode, multi-layer background light reconstruction, in Christmas Eve, you can also be as dazzling as the beautiful scenery.

Video experience

In addition to taking pictures, we also took a video with the camera. Record the Sacred Heart Cathedral in Shishi and Tianhui Square under the lens of Glory V30 PRO.

The Glory V30 Pro uses a customized sensor with a ratio of 16: 9, with a 109 customized super wide-angle camera, hardware-level HDR, 4cm super macro, and five-axis intelligent anti-shake stabilization system, which makes you more natural when shooting Christmas vlog. In our whole hand-held glory V30 PRO shooting, there is no anti-shake stabilizer, its performance is still stable, and the picture has no obvious jitter. Especially in the night scene shooting of Tianhui Square in the second half, Glory V30 PRO has ultra-high sensitivity, improves the brightness of dark parts, intelligently controls noise, and makes the picture richer and more diverse. With it, it is easier to shoot at night.

There is also a powerful computing power blessing of Kirin 990 5G. Glory V30 PRO can perform real-time color rendering and real-time beauty during video shooting, even the AI ? ? portrait color retention that could only be completed by green cloth and professional later stage. This technique can color the picture in real time according to AI intelligence, which saves the time for your later transformation, and it is also easy to shoot a large landscape by coloring "Xiaobai". In addition, the glory V30 PRO also supports an auto-zoom macro lens with a focus distance of up to 4cm. 4cm macro video can help us capture clearer details and experience more detailed beauty when shooting flowers and plants.

summary

After this series of tests, glory V30 PRO does have its own set of skills in real shooting performance. During the day, the picture proofs of the stone church are clear and natural, and there is no excessive pursuit of sharp saturation; At night, the picture sample of Tianhui Square is not afraid of noise, and it uses excellent hardware and excellent software to control and help you record the Christmas night scene. In addition, there are 12 million focus plane blessings, making video shooting more handy.

Christmas is coming, elaborate Christmas tree, flashing neon lights. Such colorful scenery, please remember to pick up the glory V30 PRO to record the last beauty of this year.