The Life of the Characters in Lin Jiaqiao's Works

Lin Jiaqiao was very clever at an early age and became famous at an early age. 1933 (22 years of the Republic of China) was admitted to the Physics Department of the National Tsinghua University with the first place in the whole school. In her freshman year, Lin Jiaqiao took the general physics course of Professor Sabendong. I chose the physics department when I was a sophomore.

1937 (in 26 years of the Republic of China) graduated from the physics department of Tsinghua University with the first place, and then stayed as a teaching assistant. 1939, Lin Jiaqiao, Guo Yonghuai, Qian Weichang and other ***2 1 people were admitted to boxer indemnity to study in Britain at the same time. Due to the sudden outbreak of World War II, shipping was interrupted and sent to Canada. Originally, the ship will pass through Kobe, and Japan is allowed to visit ashore. There is a visa on the passport. Gong Feisheng agreed that he was humiliated during his stay in War of Resistance against Japanese Aggression, so all the people left the ship angrily and returned to Kunming.

1940 went to the university of Toronto, Canada for further study, 194 1 obtained a master's degree from the university of Toronto.

194 1 year went to the United States for further study. Now the doctoral supervisor is von Carmen, and the doctoral thesis he gave to Mr. Lin has been a world-famous controversial topic for many years. This topic is the topic of a paper written by physicist Dr. Heisenberg after graduation, but many people have a serious controversy about Heisenberg's research results. Von Carmen has a close friend named JohnVonNeumann, who is the most famous master of applied mathematics in modern times and a member of the American Atomic Energy Commission. He has made many contributions to the application of mathematics. For example, he advocates using mathematical methods to predict the weather. The most outstanding thing is that a set of mathematical methods he developed can be applied to the field of economics. His John Nash won the Nobel Prize in Economics.

1944, Lin Jiaqiao graduated from California Institute of Technology with a doctorate. Von Carmen invited Lin Jiaqiao and John von Niemann to dinner, and introduced the applied mathematician to Lin Jiaqiao, hoping that they could cooperate. Later, von Naman led a group of famous scholars to confirm Mr. Lin's research results through calculation, ending the mystery of academic circles for many years. At that time, Lin Jiaqiao's project was a thorny issue, and Lin Jiaqiao proved that Heisenberg's research results were basically correct through his own research. So Heisenberg wrote to his tutor, saying that the controversial question was actually right, and it was a China who proved his research results.

From 65438 to 0947, Lin Jiaqiao was appointed as an associate professor at the Massachusetts Institute of Technology, where he successively served as an associate professor, a professor of mathematics, a college professor and an honorary professor.

1966 was elected as a professor at MIT.

195 1 became an academician of the national college of arts and sciences.

1958 was elected as an academician of academia sinica.

From 65438 to 0962, he became a member of the National Academy of Sciences and was included in the Who's Who of Science in the United States.

1976 won the prize of applied mathematics in our college.

1979 won the first prize of fluid mechanics in american physical society.

1979, was hired as an honorary professor by Tsinghua University.

From 65438 to 0987, Tsinghua University awarded him an honorary doctorate and an honorary professor.

1994, elected as a foreign academician of China Academy of Sciences.

20011was hired as Professor Tsinghua University. In August 2002, he returned to China and settled in Tsinghua University, where he became honorary director of Zhou Peiyuan Applied Mathematics Research Center of Tsinghua University, and worked hard for the development of education in China and the establishment of a world-class university in Tsinghua University.

On June 29th, 20 12, I attended the exchange meeting of friends of Tsinghua Institute of Advanced Studies on the 5th anniversary of/kloc-0. applied mathematics

In applied mathematics, Lin Jiaqiao developed analytical characteristic method and WKBJ method. He is the leader of the contemporary applied mathematics school. In the United States, some people regard Lin Jiaqiao as "the father of applied mathematics".

In mathematical theory, Lin Jiaqiao's most outstanding thing is to prove the existence theorem in a class of differential equations, which is used to completely solve the long-term controversy caused by Heisenberg's paper.

hydromechanics

Since the 1940s, Lin Jiaqiao's work on the flow stability and theory of turbulence of fluid mechanics has led the research and exploration of a generation. He solved the Orr-Sommerfeld equation by asymptotic method, developed the theory of parallel flow stability, and proved that flow instability is the mechanism of turbulence, and the results were confirmed by experiments. Together with von Carmen, he put forward the turbulence spectrum theory of isotropic turbulence, developed von Carmen's similarity theory and became the main school of early turbulence statistics theory.

Lin Jiaqiao explored theory of turbulence's research, but he didn't expect to have an argument with a Swedish mechanic during the research, but the research results of the same problem were far from each other, so the Swedish mechanic died of a stroke in an argument with others. Lin Jiaqiao visited him in the hospital before he died. He told him that complex issues would naturally be controversial. If your research results are different from mine, you are wrong. In fact, both of them are right. Complex problems are multifaceted, and different research results can be applied to different aspects. Their academic ideas finally became a big topic-complexity. There is a magazine called Complexity that discusses such problems.

astrophysics

Since the 1960s, he has entered the research field of astrophysics, founded the density wave theory of spiral structure of galaxies, successfully explained the main features of spiral structure of discoid galaxies, and confirmed that the observed spiral arm is a wave rather than a material arm, thus overcoming the "entanglement problem" that has plagued the astronomical community for decades, and further developing the dynamic theory of long-term maintenance of spiral arms of galaxies.

basic science

Lin Jiaqiao said, "When communicating with famous foreign universities, the most important thing is to understand each other's advantages and disadvantages, learn from others' strengths and make up for their own shortcomings. "It is a short-sighted and one-sided view to pay too much attention to practicality and think that' walking at the cutting edge and cutting edge' means introducing advanced technology. In principle, advanced science should pay equal attention to advanced technology, but the proportion distribution is a difficult problem to decide. Because this decision should be based on the needs of the country and the actual situation of human, material and financial resources, and this situation also changes with the times. Quote the explanation of Academician Liang, a missile expert from China: "If you master the basic knowledge and know what it is, even if you don't see the technical details of others, you can make it by imagination." Teacher Lin emphasized that the difference between "what we want to know" and "what we want to do" should be clear in inter-school communication. Key technologies may be difficult to obtain, but the basic knowledge is open and can be deepened without huge capital and manpower investment. What is "more important" and can bring long-term effects is precisely the exchange and study of basic science. Of course, you must first "practice your internal strength" and reach the level of equal dialogue with international counterparts, so that exchanges and cooperation can proceed smoothly.

Lin Jiaqiao said that MIT's "compulsory course for the whole school" is a reference system. At MIT, all students must learn four basic sciences of mathematics and science students in the first year. "China's education began to highlight professionalism very early, and MIT's compulsory course is first wide and then deep."

Lin Jiaqiao said that Harvard University, Brown University and other famous universities generally adopt the review committee system. This is a system with no capital exchange and only on-site counterpart as the cooperation condition. The purpose is to invite scholars from other universities to participate in relevant suggestions, evaluate and correct problems. At that time, Lin Jiaqiao himself was invited by Harvard University to join a "visiting committee" of about 65,438+00 people, offering suggestions and suggestions for the development of applied science in the university. Lin Jiaqiao believes that it may not be necessary to completely copy this model, but it is worth learning to invite scholars outside the school to objectively examine the teaching and research work in related fields. Monograph Book Name Author Publishing House Publication Time 1977.04 Lin Jiaqiao, author of spiral structure theory of galaxies (USA); Hu Wenrui et al. Translation Science Press 1986.05 "Applied Mathematics of Deterministic Problems in Natural Science" (USA) by Lin Jiaqiao; Translated by Zhao Deng, Translation Science Press