Two kinds of researches are presented in this dissertation. The first one is to control the spatiotemporal chaos (STC) of coupled map lattices (CML) to the homogeneous state and the homogeneous periodic orbits.

• 本文从两方面探讨了耦合映象格子中的时空混沌行为,一是探讨如何控制它到规则的同态不动点和到同态周期解上去,二是探讨如何利用它的复杂性去构建一个用于信息加密和解密的密码系统。