直接模拟复杂有趣的过程，而不是计算一套枯燥的演化公式，这是如今复杂系统研究中必不可少的要素。
Direct simulation of a process of interest, rather than the integration of a set of underlying evolution equations, is an indispensable element in the study of complex systems.
最后我们运用数值计算的方法研究了此系统的动力学演化。
Finally, we study dynamical evolution of this system using the numerical calculation.
分析计算机系统安全标准的演化过程，以及安全评价标准在安全产品评价中的实际应用情况。
The evolution history of computer security evaluation criteria and the application of security evaluation criteria to the evaluation of security products are analyzed.
应用推荐