On June 11, 2006 (May 16, 2006 lunar calendar), Yang Jiachi, an expert in aerospace technology and automatic control, passed away. An expert in aerospace technology and automatic control, an expert in instrumentation and automation, and the founder of automatic detection. One of the founders of our country's automation discipline, China Automation Society and China Instrumentation Society, academician of the International Academy of Astronautics, and academician of the Chinese Academy of Sciences. Joined the Communist Party of China in December 1980. A native of Wujiang County, Jiangsu Province, born in Wujiang County, Jiangsu Province on July 16, 1919. Graduated from the Department of Electrical Engineering, Jiaotong University in 1941. Moved to Shanghai with his parents in 1930. In 1947, he went to the United States to study and studied in the Department of Applied Physics of Harvard University and obtained a master's and doctoral degree. From 1950 to 1955, he successively served as a researcher at the University of Pennsylvania in the United States and a senior engineer at the Rockefeller Institute in the United States. After returning to China in 1956, he successively served as a researcher, director of the office, deputy director of the Institute of Automation of the Chinese Academy of Sciences, and deputy director and director of the Beijing Institute of Control Engineering. After 1968, he served as the deputy director of the 502 Institute of the Fifth Academy of the National Defense Science and Technology Commission, the vice president of the Fifth Academy of the Seven Aircraft Ministry and the director of the 502 Institute, and the chief engineer of the Ministry of Aerospace Industry. In the 1960s, he participated in the formulation of the development plan of China's industrial automation instruments, China's automation science and technology, and the ten-year plan for the development of China's artificial satellites. In 1984, In March 1986, together with Wang Daheng, Wang Ganchang, and Chen Fangyun, he put forward suggestions of great significance to the development of high technology in our country. Under the personal instructions and active support of Deng Xiaoping, the State Council, on the basis of listening to expert opinions, formulated the "863 Plan" for the development of high technology in our country, which opened up a new situation for the development of high technology in our country. In the 1980s, he was one of the advocates of the "Outline of High Technology Research and Development in our country" and made significant contributions to the development of high technology in our country. In 2000, Wang Daheng, Yang Jiachi and other academicians jointly proposed to develop our country's automotive electronic information industry and seize the commanding heights of the future world automotive computing platform. Since the establishment of the Chinese Society of Automation in 1961, Yang Jiachi has served as the executive director of the first and second councils, the vice chairperson of the third and fourth councils, and the chairperson of the fifth and sixth (1993-1997). Yang Jiachi has been committed to the development of science and technology and aerospace in our country for a long time. Participated in the formulation of China's space technology development plan, and was one of the experts of the Chinese Academy of Sciences in the early stage of space technology research. Led and participated in the development of our country's first artificial earth satellite attitude measurement system. He is the designer of the space technology subsystem. In the program demonstration and technical design of the return satellite attitude control system in our country, he put forward a series of advanced and feasible design ideas. He led the development of the returnable satellite attitude system and data analytics indicators to the international advanced level at that time. Directed the development of major scientific research projects such as detection technology and equipment required for atomic bomb explosion tests. Yang Jiachi participated in the establishment of the Chinese Instrumentation Society, which was established in March 1979. He was successively elected as the vice chairperson of the first to fourth council of the society. In order to communicate the channels of international scientific and technological exchanges, he led a delegation to the United States in 1980 and established a cooperative relationship with the American Instrumentation Society. Later, together with the Japanese Measurement and Control Society and the British Measurement and Control Society, he held multinational instrumentation academic conferences and exhibitions in China in 1983, 1985, 1987, 1991 and 1992. In these conferences, Yang Jiachi served as the leadership of the academic committee and made contributions to promoting the development of instrumentation science and technology in our country. Yang Jiachi was awarded the title of model worker by the Ministry of Space in 1984. In 1985, he won the special prize of the National Science and Technology Progress Award. Since 1990, he has enjoyed special government subsidies. In 1991, he was approved by the Ministry of Aeronautics and Space as an old expert with outstanding contributions. In 1995, he was awarded the Chen Kah Kee Information Science Award of the Chinese Academy of Sciences. In 1999, he was awarded the "Two Bombs and One Star" Merit Medal. In the same year, he was awarded the He Liang Holi Foundation Science and Technology Progress Award. On October 22, 2003, Yang Jiachi met with Chinese astronauts. Yang Jiachi died at 12:45 on June 11, 2006 in Beijing at the age of 87 due to ineffective medical treatment. The farewell ceremony for Academician Yang Jiachi's body is scheduled to be held at 9:30 am on June 17, 2006 in the First Farewell Hall of Babaoshan, Beijing. During his studies, Yang Jiachi was born in Zhenze Town, Wujiang County, Jiangsu Province, in July 1919, one of the five major silkworm towns in the south of the Yangtze River. The Yang family is a famous local silk industry family. Yang Jiachi's grandfather, Yang Xiaofan, was open-minded and did not require his children and grandchildren to read four books and five classics or attend private schools, but let them learn English and enter schools. Unlike ordinary old-school parents, Yang Jiachi's grandfather did not leave land and wealth to his descendants, but left them knowledge and culture. At that time, the silk reeling industry was still very primitive and completely manual. Yang Jiachi grew up in such a production and business environment in his childhood. Around 1930, our country's silk industry was in decline. Yang Jiachi spent his primary school years in the "Silk Industry Public School" established by his grandfather. In 1937, Yang Jiachi was admitted to Jiaotong University. This year, Japanese militarism launched a war of aggression against China, and the formerly prosperous Greater Shanghai became a "isolated island". Yang Jiachi's four years of university life were actually spent in a foreign concession. This painful experience strengthened his ambition to save the country through science and technology. In 1941, Yang Jiachi graduated from Southwest United University as a teaching assistant, and was later recommended to the Central Electrical Equipment Factory to develop carrier telephones. There, he spent more than two years to make China's first prototype of single-channel carrier telephones. Due to his outstanding work results, the Central Electrical Equipment Factory recommended him to take the intern exam in the United States. He passed the exam and entered the Harvard College of Arts and Sciences in 1947 to study. In 1949, Yang Jiachi was awarded a Doctor of Philosophy from Harvard University by defending his doctoral thesis on "Fourier Transformer and Its Applications". At this time, the People's Republic of China had been proclaimed, and Yang Jiachi, who was like an arrow, applied to return to China, but was unreasonably blocked by the United States. In desperation, Yang Jiachi applied for a job in the Department of Biophysics of the University of Pennsylvania. During his stay in the United States, Yang Jiachi successfully developed an automatic recording spectrometer, which was designated by experts as "Young's Instrument", thus ending the history of manual spectrometers. And obtained a US patent. From 1950 to 1956, he was successively employed as an associate researcher at the University of Pennsylvania and a senior engineer at the Rockefeller Institute (now Rockefeller University). During these four years, he participated in the development of high-speed analog electronic computers, presided over the development of fast recording absorption spectrometers and high-resistance self-stabilizing zero-current amplifiers, combining electronic technology, automatic control technology and medical research to create the discipline of medical electronics. In 1955, the American Process Instruments Company signed a production contract with Yang Jiachi, and gave Yang Jiachi 100 US dollars for each instrument produced.