Introduction: As the country continues to develop, there are many academicians who work hard to make their own contributions to the country, but in the end they cannot withstand the long years and they will still leave us. Yes, 21 academicians have passed away in 2021. Of course we feel very sorry for this situation. They are not only our seniors, but also heroes who have served the country. They are worthy of our admiration. We should learn from them and follow their examples in our daily lives. 1. Shen Zhonghou
Shen Zhonghou passed away on February 5, 2021 at the age of 95. He was an academician working at the Chinese Academy of Engineering, a technical expert in oil drilling, and a professor at China University of Petroleum. and doctoral supervisor. He has long been engaged in technical research on high-pressure water jet theory and has made important breakthroughs in these aspects. His combined development of high-efficiency drill bits made important breakthroughs in the theory of machinery and water conservancy. At the same time, the new drill bit he invented also obtained a U.S. invention patent. 2. Zhou Yulin
Zhou Yulin passed away on March 2, 2021. He is a famous mathematician and applied mathematician in my country. He is also an academician of the Chinese Academy of Sciences and has also worked at the Chinese Academy of Engineering Physics. researcher. He has been engaged in research on nuclear weapons theory for a long time and has also won the Technology Progress Award. In the theoretical research of nuclear weapons, he presided over the research work of numerical simulation and fluid mechanics. There has been long-term research on the theory of nonlinear differential equations in computational mathematics, and a series of results have been achieved. 3. Zhou Youyuan
Zhou Youyuan passed away on March 12, 2021. He is a famous astrophysicist in my country, an academician of the Chinese Academy of Sciences, a researcher at the National Astronomical Observatory, and a researcher at the University of Science and Technology of China. The Department of Astronomy also has excellent professors and doctoral supervisors. Zhou Youyuan is mainly engaged in the research of quasars and active galactic nuclei, involving research on cosmology and large-scale structure of the universe. He has served as the director of astrophysics at the University of Science and Technology of China and the related deputy director.