DONG Qiu-xian~(1a),ZHAN Shao-wen~(1b),Gu Wenbin~2,LIU Wei-dong~(1b)(1a.Department of Mathematics,Nanchang University;1b.Institute of Mechanics and Electronics,Nanchang University,Nanchang 330031,China;2.PLA University of Science and Technology,Nanjing 21
Abstract：In order to raise efficiency of aerial defence system,affirming which target in the sky is efficient is very important.This paper it discusses target which comes from spherial surface that its radius is R、angle at the centre is 90°.Firstly,it gives basi
2006, Vol. 30 