It turns out that the author of this paper is the great master of mechanics-Academician Qian Weichang.

Netizens who know one after another said: “Look at the references, who is so ignorant, that’s okay? Look at the author, oh, the big guys are free.” No wonder people don’t have references at all. After all, this paper is written for others as “documents.” Come “reference”.Academician Qian Weichang

Academician Qian Weichang, known as “one of the three money”, is a world-renowned physicist, educator, former president of Shanghai University, and one of the founders of modern Chinese mechanics and applied mathematics.

He was born in a scholarly family and has a solid foundation in Chinese studies, but he abandons literature and science for the rise of the country. From an internationally renowned scientific master to a patriotic student who resolutely returns to the country; from a two-sleeved university professor to a boiler factory worker who goes deep into the grassroots, he has ups and downs all his life. But never change the heart of a pure child, worry about the country and the people, and have no shame in China.

Throughout his life, his research field was changeable, frank and sincere and unrepentant: “I don’t have a major, and the needs of the country are my majors.” The needs of the motherland are my majors.

In 1912, Qian Weichang was born in a scholarly family in Wuxi, Jiangsu. His father Qian Zhi was a famous local educator, and his fourth uncle was Qian Mu, a famous Chinese master.Qian Mu

When Qian Weichang was 16 years old, his father died of illness, and he has been living with his uncle ever since. He has been immersed in Chinese history and culture since he was a child. He has read four books and twenty-four histories, and has a solid foundation in Chinese studies.

In 1931, Qian Wei, who was just 19 years old, applied for five top universities in one breath: Tsinghua University, Jiaotong University, Central University, Wuhan University and Zhejiang University.

During the test of Tsinghua University, he completed an essay of “Sleepwalking in Tsinghua Garden” in only 45 minutes. After reading the test, the teacher felt that “there is no way to change”. In the end, Qian Weichang used both Chinese and history. The scores entered into the Chinese Department of Tsinghua University.Qian Weichang in high school

But after enrollment, the “September 18th” incident broke out. At that time, young students all over the country went on strike and marched to fight against Japan. This patriotic sentiment deeply infected the passionate young Qian Weichang. He made a risky decision: abandon literary theory!

“After I heard it, I became angry. I was young. I said that we don’t have airplanes and cannons. We build them ourselves. I want to learn how to build airplanes and cannons. I am determined to abandon literature and science. The needs of the country are my major.” Qian Weichang graduated from University. According to

Qian Weichang was very active. After he made up his mind, he ran directly to the desk of Wu Youxun, the dean of the physics department, and asked to change his major. Although Qian Weichang had excellent academic achievements in literature and history, he had very serious partial subjects and had little natural science foundation. At the end of the entrance examination, his physics score was only 5, and his English score was 0.

After learning about the situation, Wu Youxun persuaded him to “be able to serve the motherland as well as learning Chinese.” However, for the next week, Qian Weichang regularly stayed in front of the office every day. Such persistence and waiting made Wu Youxun very moved and finally agreed to enter the book. Department of Science.

But the condition is that at the end of the semester, each subject must have a score of 70 or more, and if you fail to reach it, you will go back to study history.Picture from the Internet

In order to learn physics well, Qian Weichang only slept for 5 hours a day for the next year, and went to the Science Museum to endorse at 5 o’clock in the morning. He worked very hard. He also recalled: “At that time, there was Hua Luogeng who was as desperate as me. I worked very hard. I went to the Science Museum to endorse at 5 o’clock every morning, but Hua Luogeng had finished memorizing it.”

Under strict supervision, Qian Weichang completed the “military order” issued at that time. By the time he graduated from the university, only 8 people in the entire physics department of Tsinghua University had successfully graduated, and Qian Weichang was one of them.

Later, Qian Weichang said in his memoirs: “This is an important choice in my life.”

Throughout Qian Wei’s long life, the word “patriotism” has been implemented throughout, with a heart of innocence, “reading for the rise of China”.Returning from studying abroad, just to train better students

In 1939, Qian Wei traveled thousands of miles to Kunming via Hong Kong and Hanoi to teach thermodynamics at Southwest Associated University.

That same year, he was admitted to the British government-funded student who was awarded the Boxer Indemnity. Due to the sudden interruption of the Second World War, the shipping was interrupted and he was transferred to the University of Toronto in Canada to study.

50 days after Qian Weichang went to Canada, under the guidance of his tutor Singh, he published a paper entitled “The Intrinsic Theory of Elastic Plates and Shells”. This paper is considered a pioneer in the field of “rational mechanics” in the United States. For. Einstein couldn’t help but praised after seeing this paper: “This paper has solved my troubles for many years.”

Subsequently, this paper was sent to the hands of von Carmen, the father of world missiles. At this time, Qian Wei was only 28 years old, but he managed to rank among the forefront of the world and became a world-renowned scientist.Von Carmen

Two years later, Qian Weichang received his Ph.D., and then came to the California Institute of Technology to do a postdoctoral fellow in Jet Propulsion Research, under the tutelage of Professor von Kamen. At the same time, Qian Xuesen, Lin Jiaqiao and Guo Yonghuai were studying with him.

As an internationally renowned scientist, Qian Weichang has a good income in the United States. Everyone knows that if Qian Weichang continues to stay in the United States for research work, his future will be limitless.

But the generous life in front of him did not erode Qian Weichang’s patriotism. When he learned of the victory of the domestic War of Resistance Against Japan, he immediately chose to return to China.He will return to his alma mater, Tsinghua University, as a professor in the Department of Mechanical Engineering: “I am determined to come home and train better students.” Graduation photo of Dr. Qian Weichang

Then, von Karmen valued this student very much. Qian Weichang made many requests to return to China, but he was frequently hindered by his tutors and colleagues. In the end, he could only use the excuse of missing his family and the 6-year-old child who had never met. Request to return home to visit relatives.

On May 6, 1946, Qian Weichang deliberately prepaid the rent of the apartment for half a year, only brought simple luggage and a few necessary books, and returned to China by boat from Los Angeles.

This year, he was 34 years old.Qian Weichang and his wife Kong Xiangying

At that time, it was the civil war and the domestic economic recession. By 1948, Qian Weichang’s salary was only enough to buy two thermos: “Generally, professors have six classes a week, and I teach 17 classes. But I have no complaints.”

In order to supplement his family, Qian Weichang not only attends classes at Tsinghua University, but also attends part-time classes at the School of Engineering of Peking University and Yanjing University. In his spare time, he also serves as the editor-in-chief of the Journal of Tsinghua University and undertakes manuscript review work.

But even under such a hectic pace of life, he still achieved many groundbreaking results in scientific theory and engineering technology. Not only created the first mechanics major in a Chinese university, but also published China’s first monograph on elastic mechanics.Qian Weichang is teaching

In fact, as an internationally renowned scientist, he could have chosen to leave and return to the United States to continue jet propulsion research, but a problem when applying for a passport and filling in the form made Qian Weichang choose to stay in China.

“I can’t fill in the last item. He is talking about whether you are loyal to China or the United States when China is at war with the United States. I said of course I am loyal to China, and I am Chinese.”

Later, as the Dean of Tsinghua University, Qian Weichang participated in the formulation of the first chapter of the scientific development blueprint for the new China. He was the first to propose that the country should give priority to the development of atomic energy, missiles and aerospace. At that time, except for Qian Xuesen and Qian Sanqiang, all others involved in the planning More than 400 people did not support him.

But he insisted on going his own way: “I think I still have to tell the truth. What should the country do? You can’t listen to these words.”

And the facts have also proved that the new China needs these technologies. Without the successful development of two bombs and one satellite, perhaps China will not become a major country that has an important influence on the world now and in the future.Qian Weichang works in the study to worry about the country and the people, and he is worthy of China

Although in addition to various part-time jobs, Qian Weichang still persisted in publishing scientific research papers, and published many monographs such as “The Problem of Large Deflection of Elastic Round Thin Plates”, which has aroused great international response.

However, compared with the United States, Qian Weichang did a lot less research after returning to China. He devoted most of his time and energy to teaching.

His students once recalled: “Qian Weichang and his group of scholars have similar ideas. They think teaching is more important. He often tells students that I don’t have a major, and the needs of the country are my major.” Picture from the Internet

In 1957, the anti-rightist movement came. Qian Weichang was labelled a “rightist” because of his previous speeches that were “contrary to the mainstream” and his criticism of Tsinghua’s copy of the Soviet model of teaching.

Such a great scientist was forced to leave the lecture hall for teaching and educating people, and was responsible for sweeping the floor in the laboratory for a year before delegating rural labor.

Such a change made Qian Weichang unexpected, but he did not become depressed, but secretly transferred his teaching and scientific research work “underground”.

Under the arrangement of some knowledgeable experts, Qian Weichang opened various workshops, all of which were systematic lectures, which were often held for several months to six months, and trained a large number of talents in applied mathematics and mechanics for the motherland.

After being transferred to the factory, he and the workers built the heat treatment workshop from nothing, and also designed and built the best hydraulic press in Beijing at that time.Picture from the Internet

In the midst of hardships, Qian Wei has not changed his original aspirations, and has worked day and night for the development of the motherland.

At the end of the Cultural Revolution, Qian Weichang was over 60 years old. His life has been ups and downs, and he has gone through vicissitudes of life, but he is full of passion and hopeful for the future of the motherland: “I try to regain the good years that have been lost and work day and night.”

In 1983, Deng Xiaoping personally lowered the order of Qian Weichang and was transferred to Shanghai University of Technology as the president, stating that this appointment is not subject to age restrictions.

After serving as the principal, he was often seen on the Shanghai campus. A silver hair is always combing meticulously. If he sees students rushing to the classroom, he will nod with excitement to the people around him and say “Very good!”

Once I couldn’t see anyone, I immediately seemed uncomfortable and asked: “Where have all the people gone?” When I learned that there was a normal holiday, I continued to walk around the campus.Qian Weichang returned to his alma mater for the 12th time-Wuxi Dangkou Central Primary School

In 1992, Qian Weichang took the lead in establishing a flexible school management model at Shanghai University, forming a unique teaching management model centered on the credit system, course selection system, short semester system and tutorial system, and soon became popular throughout the country.

In 1993, Shanghai University of Technology merged Shanghai University of Science and Technology, the former Shanghai University, and Shanghai Technical College to form the current Shanghai University.

Because of being beaten as a rightist, Qian Weichang’s son and daughter did not go to college, but he devoted the rest of his life to cultivating comprehensive and innovative college students.

In 2005, the 93-year-old Qian Weichang sent an emotional call to the students at the Shanghai University graduation ceremony: “What do you say the world is? The world is the people! Do you care about the worries of the people, the country, and the nation? ? The world’s worries and worries, have you ever worried?” The picture comes from the Internet

Speaking of Qian Weichang, Mrs. Qian’s Kong Xiangying said: “He used to live a life like this with a pen and a book, and he didn’t care about anything else.”

In 2010, Qian Weichang passed away at the age of 98. Life time, worry about the country and the people, worthy of China.

Some people say that Qian Weichang is a versatile scientist. His research projects are diverse: he has deduced 13,000 trigonometric series summation formulas; he has studied computer coding; he has invented the award-winning “money code.”

But in fact, his whole life has only been devoted to studying one science that he thinks is the most important: patriotism. “I think what the country needs, I do. I have no other requirements. I want the country to become stronger.”

When he was young, he was passionate about literature and abandoned the theory of literature. When he was old, he taught and educates people without changing his original aspirations. Whether he did scientific research or teaching, for Mr. Qian, in his ninety-eight years, only “pure patriotism” is The same color throughout your life.

Author: Cheryl, an elite post-90s author, a British returnee, writes carefully.

The elite is said to be a gathering place for global elites, overseas returnees and overseas students. We deliver global information, explore various cultures, innovate social models, and discover independent ideas. There is temperature and attitude here, and you are welcome to follow the elites (ID: Elitestalk) with similar scents.

Reference:

Science Net: Qian Weichang: The Legendary Life of a Science Giant

Moving China 2010 Qian Weichang Award Presentation

The Beijing News: Qian Weichang abandoned literature for the country and was appointed as life-long principal by Deng Xiaoping

Popular Science China: Qian Weichang: There is no name, no profit, no regrets, love and righteousness have the motherland

Once a day: “No need to refer to any literature” the most domineering and biased student: enter Tsinghua University with a perfect score in literature and history, and make airplanes and cannons with 5 points in physics

Source: The Paper, The Paper, The Paper

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To fill this gap, in July 2020, the Academic Degrees Committee of the State Council voted to establish a first-level discipline of “Integrated Circuit Science and Engineering”. As one of the most important training bases for integrated circuit talents in my country, Tsinghua University voted to establish a doctoral and master degree authorization point for first-level disciplines in integrated circuit science and engineering in October 2020. In April 2021, on the occasion of the 110th anniversary of Tsinghua University, after discussion and approval by the 158th Standing Committee of the 14th Party Committee of Tsinghua University, it was decided to establish Tsinghua University School of Integrated Circuits.

Since the establishment of the semiconductor major in 1956, Tsinghua University has always played a main role in the training of integrated circuit talents in my country. According to statistics, the school has so far cultivated more than 4,000 undergraduates, 3,000 masters, and 500 doctoral students in the field of integrated circuits. In the past five years, more than 70% of the graduates have entered the integrated circuit industry and scientific research.

According to media statistics, there are as many as 27 well-known chip companies founded by alumni who graduated from Tsinghua University. Among the top ten companies in China’s semiconductor integrated circuit market by market value in 2020, companies founded by Tsinghua alumni or serving as CEOs occupy 6 seats, and take the top 3. These companies have raised more than 100 billion yuan from national funds and A shares, creating a Tsinghua chip circle with a market value of more than 600 billion yuan.

Ten years of trees and a hundred years of cultivation of people, the cultivation of talents has never been achieved overnight, especially for integrated talents such as integrated circuits that require the cultivation of scientific systems. Integrated circuit disciplines are based on physics, chemistry, materials science and other disciplines, involving in-depth integration of electronic information, instrument science and technology, electrical engineering and mechanical engineering and other related engineering disciplines. It has a deep theoretical background and distinctive engineering characteristics. It requires not only solid and systematic basic knowledge and theoretical training of interdisciplinary knowledge, but also engineering training that integrates production and education, practical training and practice, and more importantly requires the shaping of excellent humanistic literacy and comprehensive and balanced ability.

With the establishment of the School of Integrated Circuits of Tsinghua University, it is foreseeable that this world-class university will further integrate relevant superior disciplines, focus on the core technology of integrated circuits, and accelerate the cultivation of high-level talents in the field of integrated circuits. In order to fill the gap in my country’s chip talents, Help China’s “chips” make greater contributions to breakthroughs. (Proofreading/Aihe)

After the first few products were launched and loved by everyone, there were a large number of fans in the background Began to respond to the need to fight against the old, Among which the loudest voice is Essence.

I have given you group purchases for several issues, and the response has been very good.Many users reported that it took a while, I feel that the fine lines around the eyes are beginning to lighten, and the skin becomes fine and shiny.

If you are also troubled by fine lines, dry lines and dull skin, I really recommend you to try this anti-aging serum. The brand promises: No money if you are not satisfied, no refund for up to 30 days.

< 化妆品备案号：粤G妆网备字2020027997 >

Where is the source of aging?

In our body, cells have a set of defense mechanisms, Able to repair damage, To restore the damaged tissue to its original state and maintain balance.

But as we age, various injuries accumulate, when Cell damage speed>cell repair speedAt this time, the skin begins to look old gradually.

Skin aging starts from cell aging, and the main reason for cell aging is DNA damage. And these injuries, Mainly from photoaging and free radical oxidation.

Light aging refers to Ultraviolet rays in sunlightDestroy cells in the dermis, loss of collagen, and lack of support in the epidermis, which will cause wrinkles and sagging skin.

Free radicals will oxidize cells, damage your skin, and cause a lot of cell damage.

So, the most important thing about facial anti-aging is Prevent and repair light aging,as well as Resist oxidation caused by free radicals.

Is there no good anti-aging product on the market? Of course there are, but they are all expensive.

Fortunately, the anti-aging ingredient that Xi Chen’s team has been developing can start directly from the cause of aging, and it can significantly improve stubborn wrinkles and dullness.

< A 57-year-old tester, after 84 days of use, wrinkles smoothed out a lot>

Seeing such a good effect, I know you may not believe it. In fact, when Xi Chen’s team developed the “small bottle” anti-aging serum, the big problem they faced was: How to convince others of its effects.(Because the effect is remarkable, but the price is not high…)

And what’s interesting is that its ingredients must be both familiar and unfamiliar to you.

“Photoaging Nemesis”

The originator of cell repair

It is regarded as the master ingredient by many European and American brands

In 1982, the first bottle of essence ANR was born in history (It’s the famous little brown bottle). Although it has been upgraded many times, the core component of the small brown bottle is always the lysate of the fermentation product of Difid yeast. The small brown bottle is also enduring, selling well for more than 20 years.

Since then, many European and American brands, such as Ou*ya and *Kou’s small black bottles, also use Difid yeast as their core ingredient.

This can be popular with many brands Saccharomyces bifidus,what exactly is it?

Two-splitting yeast is commonly known as “lightAging nemesis”, Is also irradiated by ultraviolet rays, with the protection of the two-splitting yeast, the number of DNA fragments is reduced to one-third, andThe repair speed is doubled,It is equivalent to 6 times the original protection, which greatly delays skin aging.Effectively prevent photoaging of the skin,So as to achieve the effect of anti-wrinkle repair.

“To make an inappropriate metaphor, If you start to use dichotomous yeast in large quantities when you are 21 years old, the skin of your peers has reached 27 years old, and you still stay at 22 years old.. ”

< 数据来自公开论文，二裂酵母能够加速DNA修护，改善肌肤衰老 >

however, The biggest flaw of the two-splitting yeast is that it is too expensiveIn the early days, the price of one kilogram can reach 200,000! Although the price has been decreasing year by year, the threshold is too high. There are only classic European and American brands, and many people cannot afford it.

This problem was also difficult for Xi Chen, and it made her want to give up for a while.

The cost is too high, over budget

Postponed indefinitely, a product that shouldn’t have appeared

Xi Chen intends to make an essence with two-splitting yeast as the main ingredient, the content is high enough to play a role in intensive repair and improvement (in her own words: “I really want to use a good product”).

< 某品牌精华液 VS 植卡美酵母肌底精华液成分表实拍 >

The product was originally planned to be launched at the beginning of this year, but after 23 formulation iterations, the budget far exceeded expectations, which meant that the price would increase accordingly.

My colleagues said helplessly,Finally understandthat Why are these European and American brands so expensive…

And due to the impact of the epidemic, the supply of various materials has soared, and the product launch has encountered major obstacles, and it was even decided to postpone it indefinitely.

The original intention of Chikamei was established, It is to let more people use affordable prices and high-quality products.Although the product is very good, we would rather not do it if we can’t achieve a price-performance ratio far beyond the industry.

“Unexpectedly, at this time, our customers helped us.”

During the epidemic, business in most industries was affected. However, due to the customer’s reputation and repurchase, Zhikamei rose against the trend and became the top growth customer of COSMAX.

This allowed Cosmos to give us greater support, not only greatly reducing the management fee, but also actively helping us negotiate with the supplier three times, and finally reducing the price of raw materials, so that our small baby bottles can be successfully listed.

Another reason for the high cost is that, in addition to the two-splitting yeast, the small baby bottle also has two strengths:

Palmitoyl tripeptide-5, Anti-free radical oxidation, can promote collagen production, the effect is comparable to injection of collagen, known as “collagen peptide”.it can Fills in and reduces deep wrinkles.

Nicotinamide, The main ingredient of the ola* small white bottle, also has a concentration of 3%, which allows you to resist aging and wrinkle at the same time, Get rid of dullness and brighten skin tone.

Palmitoyl tripeptide-5, Anti-free radical oxidation, can promote collagen production, the effect is comparable to injection of collagen, known as “collagen peptide”.it can Fills in and reduces deep wrinkles.

Nicotinamide, The main ingredient of the ola* small white bottle, also has a concentration of 3%, which allows you to resist aging and wrinkle at the same time, Get rid of dullness and brighten skin tone.

The three elements are powerfully combined to truly improve from the source and give you a really good look!

Bom~~

I feel my skin was sucked

Baby bottle The frosted transparent bottle is very textured. Shake it, the essence can flow freely in the bottle. It is usually easier to push away and absorb quickly with strong fluidity.

< 图片来源：小红书用户kiki小郑 >

Unscrew the bottle cap, squeeze the straw gently, drop the essence on your hand, Neither sticky nor greasy, It’s easy to push away, the texture is light, The skin absorbs quickly, There is no feeling of clogged pores or airtightness.

< 图片来源：苏一曼_wsh >

There is a faint Rosemary, Like walking in the forest after the rain.

< 图片来源：依旧是个小仙女 >

Apply it on the face and it will melt water in one swipe, and the upper face will be absorbed quickly and it is very moisturizing. The small baby bottle is a repair essence. After rubbing it on, it can repair skin damage to a large extent, moisturize, repair and anti-wrinkle.

I use it at night, after getting up in the morning The skin feels very firm and the pores are also finer；

After two days, the skin is translucent from the inside to the outside, with Slight luster；

The skin tone has been brightened a lot after a week, and the skin is very good all day Hydration and abundance.

Skin care is a long-term job. As the number of uses increases, you will find that your face will start to plump up. The dull complexion has been improved, and the small fine lines and dry lines have gradually faded.

// customer feedback//

The small milk bottle liquid was limited to 5,000 new bottles on May 18, and it was snatched by fans in less than an hour.When exporting the order in the evening, Xi Chen found that some classmates and friends were using Chikamay products.

The following is the real message of some users when the essence is sold on the official official account of Chikame. Before you buy, you can also read historical articles and real messages from old fans on the official account.

< 图片来源：植卡美官方公众号粉丝留言截图 >

Even the always picky Taobao evaluation has been turned into a large-scale confession scene by users: “Quick absorption and firming of the skin”, “Fine and white skin”, improved fine lines”, “Mom-grade anti-aging essence”…

< 图片来源：植卡美某宝官方店评价截图 >

On the day of the sale, a customer bought 16 bottles. The customer service lady thought she had placed a wrong order, so she called and asked, but she said no:

“I once saw an aunt at the counter. She was about fifty years old, but her skin was very delicate and shiny. She didn’t even look at it and asked the cabinet sister to pack a lot. At that time, I was thinking, when should I stock up? heap……”

There is another user who makes me jealous. She has just started to use small milk bottle essence when she just went to college.

She also bought a bottle for her mother:

“I don’t have wrinkles, so I even rubbed my mother’s EL, but my mother’s wrinkles did fade. She said that wrinkles were obvious without wrinkles for a while, so she can’t live without them. I am now in college. I don’t have to squeeze, I just saw you release a new product, I can afford the small bottle haha…”

One of Xi Chen’s classmates bought it back and used it as a lotion. After half a month, he said yes Fine lines really faded,feel The skin is also shiny and fine, Now dare to use the front camera again

// product price //

In March of this year, Chikamei has surpassed 1,191,106 peopleThe user has used it, and has entered Tmall: (Shikamei flagship store), and it has officially become an emerging domestic brand!

Looking back on this time, Xi Chen said, “Two years ago, We had only one idea at the time, which was to make high-quality facial masks at only one-fifth the price of European and American brands. Then to each of the following products, creams, eye creams, essences…I hope everyone can enjoy a high-quality but inexpensive skin experience…”

The European and American brands with the same ingredients are priced from 700 yuan to 1300 yuan online. The small bottles of Plantkamei do not lose their essence in terms of experience or efficacy. According to common sense, how can the price be similar.

But Xi Chen said that he must not forget the original intention when he did it, and after careful consideration, he set the price only at 228 RMB/bottle, Close to 1/3 of *Poem Lauder.

At the current promotion stage, in order to let everyone have a chance to feel its quality, I have won a group purchase discount for everyone:

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10 yuan off for two bottles: Actually paid 276 yuan,It’s equivalent to 138 yuan a bottle! !It is recommended to buy two bottles. Keep using it for about three weeks and you will be able to see amazing changes in your skin.

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