中文摘要：

通过在Chen系统的第一个方程中加入一个可变系数的乘积项，构造了一个新的三维自治混沌系统．新系统可通过调节其可变系数实现不同系数组合下系统的混沌产生或混沌抑制，即调节该乘积项的可变系数，可使不出现混沌的Chen系统产生混沌现象，同时也可使产生混沌运动的Chen系统不再产生混沌现象．详细分析了新系统的特性，研究了新系统的混沌同步问题，并给出了相应的仿真结果．

英文摘要：

In this paper, a new three-dimensional autonomous chaotic system is constructed by adding a product term with variable coefficient to the first equation of Chen＇s system. The new system with different groups of coefficients can be chaotic or not by adjusting the variable coefficient, that is, by adjusting the variable coefficient, chaos occurs in new system when Chen＇s system is not chaotic, or chaos is suppressed in new system even if Chen＇s system is chaotic. The characteristics of the new chaotic system are analyzed in detail and the synchronization of new system is considered. Moreover, the simulation results are also presented.