| Bilinear control system has been studied for over twenty years.This paper describes the bilinear control study of A. K. Khapolov since 2001,and Lin Ping'work on this basis. Main content is the development of the controllability of semilinear parabolic equations under the bilinear control , some results and the methode,which is also includes the controllability of bilinear control systems which satisfy Newton's law. |