1. Great aspiration of serving the motherland-Hua Luogeng
After the July 7th Incident, Hua Luogeng, a great mathematician, returned to the motherland where anti-Japanese war was raging, not for money or a degree, and actively participated in the anti-Japanese national salvation movement after returning home. In 195, he became an internationally renowned first-class mathematician and was hired as a tenured professor by the University of Illinois in the United States, but he resolutely led his family back to the newly liberated motherland.
2. Qian Xuesen
In p>195, Comrade Qian Xuesen tried to return to the motherland. At that time, kimble, the undersecretary of the US Navy, claimed: "Qian Xuesen is worth five divisions wherever he goes. I would rather kill him in the United States than let him leave." Comrade Qian Xuesen was persecuted by the American government, placed under house arrest and lost his freedom.
In October p>1955, after Premier Zhou Enlai's continuous efforts in diplomatic negotiations with the United States-even at the expense of releasing 15 senior American generals captured in the Korean War, Comrade Qian Xuesen finally broke through various obstacles and returned to the motherland.
since April 1958, he has been a technical leader in the development of rockets, missiles and spacecraft for a long time, and has put forward an extremely important implementation plan for the development of rocket and missile technology in China-an indelible and great contribution to the development of rocket, missile and space industry in China.
expanding information
1. Hua Luogeng's personal contribution
Hua Luogeng's early research field was analytic number theory, and his achievements in analytic number theory were particularly well known. The internationally renowned "China school of analytic number theory" was the school initiated by Hua Luogeng, which made many significant contributions to the distribution of prime numbers and Goldbach conjecture.
Hua Luogeng is also the founder and pioneer of China's research on analytic number theory, matrix geometry, canonical group and automorphic function theory. Hua Luogeng's research on the theory of multiple complex variables and canonical groups has been ahead of the western mathematics field for more than 1 years, and he is an internationally famous "China school of canonical groups".
Initiate the China School of Mathematics and lead it to the world-class level. Many outstanding young people have been trained, such as Wang Yuan, Chen Jingrun, Wan Zhexian, Lu Qikeng and Gong Sheng.
2. Qian Xuesen's personal contribution
Qian Xuesen has done pioneering work in many fields of mechanics. He has made a lot of research achievements in aerodynamics, the most prominent of which is the similarity law of transonic flow. Together with Carmen, he first put forward the concept of hypersonic flow, which provided a theoretical basis for aircraft to overcome thermal barriers and sound barriers in the early stage and laid an important theoretical foundation for the development of aerodynamics.
The formula used in the design of hypersonic aircraft is Carmen-Qian Xuesen formula named after Carmen and Qian Xuesen. In addition, Qian Xuesen and Carmen put forward a new nonlinear instability theory of spherical shells and cylindrical shells in the late 193s.
Qian Xuesen has done pioneering work in aerodynamics and solid mechanics of applied mechanics. The research on compressible boundary layer carried out in cooperation with von Carmen reveals some temperature changes in this field and establishes the "Carmen-Qian approximation" equation. In cooperation with Guo Yonghuai, the concept of upper and lower critical Mach numbers was first introduced into transonic flow.
Baidu Encyclopedia-Qian Xuesen
Baidu Encyclopedia-Hua Luogeng