Topic: China vigorously introduces overseas high-level talents.
Qian Xuesen is a modern scientist in China, a world-famous rocket expert, an expert in engineering cybernetics in China, a system engineering expert and a system science thinker. A native of Hangzhou, Zhejiang Province, was born in Shanghai on December 11th, 1911. He graduated from Jiaotong University in 1934, went to study at Massachusetts Institute of Technology in 1935, got a master’s degree the following year, and then transferred to California Institute of Technology for further study under the guidance of tutor T.von Carmen. After receiving his doctorate in 1938, he stayed in school to teach and engaged in rocket and missile research. From 1947 to 1955, he was a professor at MIT and California Institute of Technology. After returning to China in 1955, he served as a member of the Aviation Committee, vice president and dean of the Fifth Research Institute of the Ministry of National Defense, president of the China Academy of Space Technology, vice minister of the Seventh Ministry of Machinery Industry, deputy director of the National Defense Science and Technology Committee, and deputy director of the Science and Technology Committee of the National Defense Science, Technology and Industry Committee. Joined the Communist Party of China (CPC) in 1959. In 1991, he served as honorary chairman of China Association for Science and Technology.
Qian Xuesen’s monographs include Engineering Cybernetics, Lectures on Physical Mechanics, Introduction to Interstellar Navigation and On System Engineering. More than 50 of his academic papers have been published in American journals and more in domestic journals. Qian Xuesen is a member of the Department of Mathematical Physics of China Academy of Sciences, honorary chairman of China Aerospace Society and vice chairman of China Association for Science and Technology.
Qian Xuesen served as the technical leader of China’s rocket and space program for a long time, and made great and pioneering contributions to space technology, system science and system engineering.
1. Applied mechanics
Qian Xuesen has done pioneering work in aerodynamics and solid mechanics of applied mechanics.
With feng? Carmen’s cooperative research on compressible boundary layer reveals some temperature changes in this field and establishes Carmen-Qian Xuesen method. In cooperation with Guo Yonghuai, the concept of upper and lower critical Mach numbers was first introduced into transonic flow.
2. Jet Propulsion and Space Technology
From the 1940s to the early 1960s, Qian Xuesen put forward some important concepts in the field of rockets and aerospace: in the 1940s, he put forward and realized the rocket-assisted takeoff device (JATO), which shortened the runway distance; In 1949, the concept of rocket passenger plane and the idea of nuclear rocket were put forward. In 1953, the possibility of interplanetary flight theory was studied; In the Introduction to Interstellar Navigation published in 1962, the concept of a round-trip transportation system between heaven and earth was put forward, in which a large plane with a jet engine was used as the first-stage vehicle and an aircraft with a rocket engine was used as the second-stage vehicle.
3. Engineering cybernetics
In the process of its formation, engineering cybernetics takes the engineering practice of designing stability and guidance system as the main research object. Qian Xuesen himself is the pioneer of this kind of research work.
4. Physical mechanics
In 1946, Qian Xuesen combined the physical, chemical and mechanical properties of rare gas, which was a pioneering work. In 1953, he formally put forward the concept of physical mechanics, and advocated that the macroscopic mechanical properties of matter should be determined from the microscopic laws, changing the previous method of measuring mechanical properties only by experiments, which greatly saved manpower and material resources and opened up new fields of high temperature and high pressure. In 1961, his Lectures on Physical Mechanics was officially published. Now the leader of this science is Professor Gou Qingquan. In 1984, Qian Xuesen suggested to Gou Qingquan that physical mechanics should be extended to the engineering technology of atomic and molecular design.
5. System engineering
Qian Xuesen not only refined the practice of China’s aerospace system engineering into the theory of aerospace system engineering, but also put forward the concept of the overall design department of national economic construction in the early 1980s. He also persisted in popularizing and applying the concept of aerospace system engineering to the whole country and national economic construction, and discussed the social system from the perspective of social form and open complex giant system.
6. System science
Qian Xuesen’s most important contribution to systems science is that he developed systematics and methodology of open complex giant systems.
7. Thinking science
(1) In the early 1980s, Qian Xuesen proposed to establish a department of thinking science and technology. He believed that thinking science is a science dealing with consciousness and brain, spirit and matter, subjective and objective, and it is a major department of modern science and technology. It is the need of computer technology revolution that promotes the scientific research of thinking.
(2) Qian Xuesen advocated that the development of thinking science should be combined with the work of artificial intelligence and intelligent computers. Based on his personal experience in the development of applied mechanics, he pointed out that the study of artificial intelligence and intelligent computers should take applied mechanics as a reference, take the road of integrating theory with practice and actually need theoretical guidance. He also believes that the establishment of thinking in images is a breakthrough in current thinking science research, and it is also the core issue of artificial intelligence and intelligent computers.
(3) Qian Xuesen applied the systematic scientific method to the research of thinking science, and put forward the systematic view of thinking, that is, first, based on the thinking process of logical units, he gradually built a first-order thinking system with a single thinking type, that is, he built abstract thinking, image (intuitive) thinking, social thinking and unique thinking (inspirational thinking). The second is to solve the problem of second-order thinking open large-scale system; Finally, the decision-making consultation high-order thinking open giant system.
8. Human science
Qian Xuesen put forward the theory of "human functional state" to describe the human body, an open complex giant system, and to study the structure, function and behavior of the system. Qian Xuesen is an advocate of physical science in Chinese.
9. Science and technology system and Marxist philosophy
Qian Xuesen believes that Marxist philosophy is the highest generalization of human understanding of the objective world and modern science and technology (including scientific social science). Qian Xuesen summarized the development of contemporary science and technology into ten closely related science and technology departments. The division method of these ten science and technology departments is another innovation of Qian Xuesen’s scientific classification method by applying Marxist philosophy, especially system theory. anecdote
1. The soul is Chinese childlike innocence.
"I have always believed that I will be able to return to my motherland. Today, I finally came back!" This is a very emotional remark made by Qian Xuesen, a famous scientist and rocket expert in China, to the comrades of China Travel Agency who received him when he returned to Guangzhou from the United States on October 8, 1995. He returned to China with his wife and two young children.
In August 1935, Qian Xuesen went to the United States to study and study aviation engineering and aerodynamics as a publicly funded international student. Before returning to China, he served as director of supersonic laboratory of California Institute of Technology and director of Guggenheim Jet Propulsion Research Center.
On October 1st, 1949, Mr. and Mrs. Qian Xuesen celebrated this festival with more than a dozen overseas students from China. While enjoying the moon, they poured out their feelings, rejoiced at the birth of the motherland and were full of longing for the bright future of the motherland. At this time, Qian Xuesen had a strong desire to return to the motherland at an early date and serve the country with his own expertise.
In July 1950, the US government decided to disqualify Qian Xuesen from participating in confidential research on the grounds that he had a friend relationship with Weinbaum, and accused Qian Xuesen of being an illegal immigrant from party member, communist party, USA. These groundless accusations were all rejected by Qian Xuesen. However, Qian Xuesen couldn’t stand all this and decided to return to his motherland immediately on the grounds of visiting relatives, ready to never return. He met with US Navy undersecretary kimble, who was in charge of his research work, and solemnly declared to kimble that he was ready to leave for home immediately. Kimble was shocked after hearing this.
Unconsciously, Qian Xuesen made all the preparations for returning to China, went through the formalities for returning to China, bought a plane ticket from Canada to Hong Kong, and handed over the luggage to the handling company for shipment.
However, just two days before their family planned to leave Los Angeles, that is, at midnight on August 23, 1950, they suddenly received a notice from the Immigration Bureau that they were not allowed to leave the United States. At the same time, the US Customs detained all Qian Xuesen’s luggage.
Qian Xuesen was forced to return to California Institute of Technology, and the FBI sent someone to monitor his family and all his actions. Far from it, on September 6, Qian Xuesen was suddenly illegally detained by the FBI and sent to the Immigration Detention Center for detention.
After Qian Xuesen was detained for no reason, the teachers and students of California Institute of Technology and Qian Xuesen’s teacher Feng? Carmen and some American friendly people protested strongly to the Immigration Bureau, found a defense lawyer for him, and raised $15,000 bail to bail Qian Xuesen out.
From then on, Qian Xuesen continued to be persecuted by the Immigration Bureau. His actions were restricted by the Immigration Bureau and monitored by FBI agents. He was not allowed to leave Los Angeles where he lived, and he was regularly questioned. Qian Xuesen lost his freedom for five years.
然而,钱学森挚爱祖国的赤子之心反而更加炽热。他日夜思念着新中国,他坚持斗争,不断地向移民局提出离开美国回国的要求。1954年用英文写出30多万字的《工程控制论》。实际上,工程控制论与生产自动化、与电子计算机的研制和运用、与国防建设都密切相关,只不过当时美国当局没有认识到这点就是了。
钱学森返回祖国的斗争,也得到祖国的关怀和支持。1954年4月26日,印度支那国际会议期间,中国代表团秘书长王炳南与美国代表团负责人亚?约翰逊分别代表两国政府开始关于平民回国问题的接触。在接触中,王炳南特别指出,美国正在阻挠许多旅居美国的中国人返回中国,其中包括科学家钱学森。
1955年6月的一天,钱学森摆脱特务监视,在寄给在比利时亲威的信中,夹带了一封书写在香烟纸上、给全国人大常委会副委员长陈叔通的信,请求祖国帮助他早日回国。陈叔通先生收到信的当天,就把它送到周恩来总理手里。1955年8月1日中美大使级会谈在瑞士日内瓦进行,王炳南大使按照周总理的授意,以钱学森要求回国的这封信为依据,与美方交涉,迫使美国政府允许钱学森离美回国。
1955年9月17日,钱学森与他的夫人和两个幼儿终于乘坐美国“克利夫兰总统号”邮船,离开了洛杉矶,驶向地处东方的祖国。
2.坚定的马克思主义者
1989年8月7日,中共中央总书记江泽民和国务院总理李鹏会见了钱学森,祝贺他获得1989年国际技术与技术交流大会授予的奖励和称号,认为“钱老获得这样的荣誉是当之无愧的。这不仅是钱老个人的光荣,也是中国的光荣,是中国科学技术工程人员的光荣”;钱学森的经历,“体现了一位中国知识分子所走过的曲折道路,也集中表现了中国知识分子的光辉品德”。
1981年秋至1982年夏,钱学森同中国社会科学院一位朋友的多次通信,是他品格的一个方面的真实生动的写照。
钱学森是一位自觉的马克思主义者。他在给一位朋友的信中说:“我近30年来一直在学习马克思主义哲学,并总是试图用马克思主义哲学指导我的工作。马克思主义哲学是智慧的源泉!而且一个马克思主义者是绝不会不爱人民的,绝不会不爱国的。”
After Qian Xuesen left the United States in 1955, he never went there again. In 1979, his alma mater, California Institute of Technology, awarded him the title of "Outstanding Alumni", in June 1986, the Southern California Chinese Scientists and Engineers Association awarded him an award, and in 1989, the International Technology and Technology Exchange Conference awarded him an award in new york, but he didn’t go. Qian Xuesen has a very friendly feeling for the American people and American scientists. For what reason does he think that he will never set foot on American soil again in this life? In 1985, an American friend told a leader in the State Council, China, about Qian Xuesen’s visit to the United States: "In the case of the US Immigration Bureau, money may have been deport at the beginning, so it must go through some kind of Amnesty procedure to enter the country. This is where you and Ambassador Han must come forward. If you really do this, you have to plead with the US government, or invisibly admit that their original measures are correct. This will not be satisfactory in Qian’s heart. " In a letter to a leading comrade in the State Council, China on March 9, 1985, Qian Xuesen gave a very frank answer: "It is not suitable for me to go to the United States. ….. The fact is that if I go to America now, I will’ prove’ many completely wrong things, which is not what I should do. For example, I am not forced to return to my motherland by the US government; As early as 1935, before I left the motherland, I promised my classmate Dai Zhongfu, an underground party member, that I would return to serve the motherland after my studies. My decision to return to China is my own business, and I have made preparations since 1949. ….. I think this is a question of right and wrong, and I can’t be silent.History cannot be distorted. Qian Xuesen’s character on this issue is exactly what General Secretary Jiang Zemin praised for his "high national self-esteem, national self-confidence and national integrity".
3. The bearer of the scientific torch
Qian Xuesen has always insisted on writing neat letters to young people asking for advice, and has always insisted on discussing problems and refining ideas with scientists in many disciplines with neat letters. Letters are a way for Qian Xuesen to publicize his belief in Marxist philosophy, guide scientific research with Marxist philosophy, and absorb scientific achievements to continuously deepen and develop Marxist philosophy. In a letter to He Zuoxiu, Qian Xuesen said: "The philosophical problem of quantum mechanics has been arguing for more than 50 years and has not been solved. Recently, Bell inequality has been verified, and the problem has become more serious. I think our physicists and philosophers in China should devote themselves to this research, solve it satisfactorily and develop Marxist philosophy in the process. "
From January 7th, 1986, Qian Xuesen personally led the scientific activities of "Systematic Seminar". The young and middle-aged scientists who participated in the seminar were from China Academy of Sciences, Peking University, Beijing Normal University, China Renmin University, China Academy of Social Sciences, Ministry of Aerospace Industry and other units. At the beginning of the seminar, Qian Xuesen proposed to this group of young and middle-aged scientists that we should absorb the research results of modern natural science and use it as the building material for establishing the basic science of system science and the general theory of all systems-"systematics".
At the Second National Congress of the National Association for Science and Technology held on March 15th, 1979, Qian Xuesen put forward the idea that "the modernization of science and technology must drive the modernization of literature and art" and put forward the concept of "scientific literature and art" to enrich and develop the connotation of popular science. Qian Xuesen is a loyal listener of popular science programs in china national radio, and a long-term reader of advanced popular science magazines Scientific American in the United States and New Scientist in the United Kingdom.
Editor: Zhao Xuanxuan