Chinese name: Luohe native place: Donghu Market Town, Lianshui County Date of birth: 1904 Date of death: 1988 Graduate school: Tangshan Institute of Technology, Jiaotong University (now Southwest Jiaotong University) Life experience, hobbies, specific achievements, Luohe life experience (1904- 1988) Luohe was influenced by his family since childhood and studied hard. In 7 years of the Republic of China (19 18), he was admitted to the ninth middle school in Jiangsu province. 1 1 In the summer of, he was admitted to Beiyang University and Tangshan Institute of Technology (now Southwest Jiaotong University). After studying at Beiyang University for more than a month, I went to Tangshan Institute of Technology to study civil engineering. He worked as a public engineer in beijing-shanghai railway Works Section for 20 years, returned to Tangshan Institute of Technology as a lecturer in the spring of 23 years, and was promoted to associate professor in 29 years and professor in 32 years. In 34, he was sent to Cambridge University for further study. After returning to China for 36 years, he still served as a professor at Tangshan Institute of Technology. In 37, Tangshan Institute of Technology moved south to Shanghai, but the opposition was invalid. He went to Beijing to wait for liberation and taught at Peking University Institute of Technology. 1April, 938, served as the director of the resumption Committee of Tangshan Institute of Technology. In June, the school moved back to Tangshan from Shanghai. In addition to continuing to teach, he once served as academic director, provost, deputy mayor of Tangshan, executive director of China civil society, and chairman of Tangshan Branch. 1956 * * Joined China. Love Luohe and love science. When I was studying in Tangshan Institute of Technology, I became interested in the geometric solution of elementary mathematics and the analysis and solution of various geometric problems. After research and accumulation, I wrote papers such as Solution of a Regular Polygon Triangle, A Problem of Triangle Geometry, and Diagram of a Simultaneous Equation, which were published in Science magazine at that time. The Commercial Press published his series of simultaneous equations of geometry and mathematics. Although the research topic at that time belonged to the category of elementary mathematics, its thinking was novel and its solution was wonderful, which filled the long-standing gap in elementary mathematics. Luohe is one of the earliest scholars at home and abroad who put forward analytical methods to deal with aerial survey problems. 1950, he published a paper "Mathematical Analysis of Aerial Survey" in the Annual Journal of the American Society of Civil Engineers, and expounded an aerial photogrammetry analysis method based on the cosine principle of spatial geometric direction. After more than ten years, he continued to explore and published "Analytical Cartography of Aerial Survey" in Journal of Civil Engineering, Journal of Surveying and Mapping and Journal of Surveying and Mapping with 1956, 1957 and 1964 respectively. At that time, he was praised by the scientific and technological circles as a scholar and expert who was "unique and unique". 1976, he started his research work which was interrupted for ten years due to the Cultural Revolution. Many research papers have been published in Railway Aerial Survey and Journal of Surveying and Mapping, such as Regional Topography Composed of Irrelevant Independent Models, and Regional Network Adjustment Based on Independent Model Method of Tripartite Photographs from Ray Angle. Luohe is a famous scholar who studies the principles of graphics in China. In 37 years of the Republic of China (1948), he published the paper "Experimental Data as * * * Line Diagram" in Journal of Franklin College. 1953, China Science Books and Instruments Company published his monograph "Principles of Graphic Calculation". 1954 published papers such as "Simple Approximation Method of Formula Root Value" and "Interpolation Formula of a Multivariable Function" in Mathematical Bulletin, and expounded the theory of graphic calculation method of * * * line, which made important contributions to the establishment and development of graphics discipline in China. Luohe's extraordinary academic achievements and his life stories have been included in China Dictionary of Scientists. He is not only a famous expert and scholar, but also a famous professor. He has been engaged in education for decades and has trained a large number of technical and scientific research talents for the country. 1988106 14 died of a heart attack at the age of 84. Luo He, a famous scholar, loved mathematics since childhood. At the age of 16, he discovered the famous theorem in conic curves, and the French mathematician Gauss solved some theorems of regular polygons and other polygons at the age of 19. He respects them very much and is determined to follow their example, work hard and make unremitting research on elementary mathematics. Elementary mathematics is a very old science, and almost all problems have been solved by predecessors. But he didn't flinch because of this, but insisted on research. When he was a student, he discovered the relationship between four pairs of vertical lines in a triangle, solved the linear equations with a ruler compass, and divided the circumference into prime numbers with geometric drawing. 1927, 24-year-old Luohe published the triangle solution of regular polygon, the equal division of circumference, the diagram of simultaneous equations and one of the geometric problems of triangle in the magazines of Science and Yi Xue. Some of these problems have not been solved by predecessors, and some have been solved by world-famous mathematicians, but he has made new answers from another way. Because the solution of Luohe is novel, wonderful and creative, the Commercial Press published his Series of Simultaneous Equations of Geometry and Mathematics at 1936. 1985, he compiled scattered manuscripts about elementary mathematics published in Chinese and foreign journals into a book, Exploration of Interest in Elementary Mathematics, which was published by China Railway Publishing House, enriching the academic garden of elementary mathematics. Created the analysis method of China aerial survey. In 1930s and 1940s, China began to use aerial photogrammetry to survey topographic maps. The method used at that time was simulation. The equipment used is very expensive precision optical instruments. At that time, China did not have the technical conditions to manufacture this instrument, so it had to rely entirely on imports. With the national strength at that time, it was very difficult to popularize this advanced method of topographic mapping. In order to popularize it, we must find a way to get rid of precision optical instruments. His inspiration comes from the article "Space Rear Intersection in Photogrammetry" published by P.H. Underwood in the Journal of American Society of Civil Engineers, Volume 1 12. From 1945 to 1947, when he was studying in Britain, he began to study the analytical method of aerial survey. This is the first time that analytical method has been used in China aerial survey. 1950 published Mathematical Analysis of Aerial Photography in American Civil Engineering Yearbook, and has been engaged in this research ever since. Scholars in the former Soviet Union praised his research, so it was once a scientific research topic of Sino-Soviet cooperation. By the end of 1960s, computers began to be used in China, and the photogrammetry circles in China began to notice the prospect of analytical method, and did some research in this respect. During the period of 1957- 1964, Luo He published papers such as Analytical Cartography of Aerial Photogrammetry, General Analytical Method of Aerial Triangulation and Analytical Method of Aerial Triangulation Based on Ray Angle in the Journal of Civil Engineering, Journal of Surveying and Mapping, etc., and comprehensively and systematically expounded that ray angle is the basis. At that time, the international photogrammetry community was generally concerned about the systematic error processing of image point coordinates. 1979 put forward the method of compensating system error, and published the adjustment of regional network based on triple photo independent model method of ray angle. 1 Luohe. Triangular solutions of regular polygons. Scientific Journals, 1927, 12( 1 1)3 Luohe. Graphical solution of simultaneous equations. Journal of Science, 193 1, 65438. 193 1, 15 (12) 3 Luohe. Geometry of simultaneous linear equations. Beijing: Commercial Press, 1936.8 Luohe. Principle of graphic calculation. Beijing: China Science Book Instrument Company, 1953. Luohe 4(2) 5. Analytical mapping method for aerial photogrammetry. Journal of Civil Engineering,1956,3 (4),1957,4 (1) 6 Luohe. General analysis method of aerial triangulation. Journal of Surveying and Mapping,1958,2 (. 1964.8 Luohe. The regional topography consists of independent models that are not related to each other. Railway aerial survey, 1976. 9 Luohe. Adjustment of regional network based on three photos independent model method based on ray angle. Journal of Surveying and Mapping, 198 1. 10 Luohe. Interest in elementary mathematics.