基于差分进化的复杂软件系统动态可靠性分配

现有关于复杂软件系统可靠性分配的研究均基于结构固定的软件系统，而实际情况中软件系统结构往往不固定。针对这一矛盾，构建复杂软件系统动态可靠性分配优化模型，并基于差分进化设计复杂软件系统动态可靠性分配算法。在系统结构发生变化时，首先基于D-S证据理论对系统中各模块的全局权重重新进行评估，并考虑变化前后系统的关联性，在差分进化生成初始种群时保留了部分历史解。最后，通过仿真实验分析验证了所提方法的有效性。

Dynamic reliability allocation of complex software system based on Differential Evolution

Existing research on the reliability allocation of complex software system just based on software systems whose structure were fixed, but the structure of software systems always change in practice. For this contradiction, this paper presents a dynamic reliability allocation optimization model of complex software system. At the same time, developing a dynamic reliability allocation algorithm of complex software system based on differential evolution. Specifically, when the system structure changes, we first estimate the parameters of each module according to the Dempster-Shafer evidence theory. Next, taking account of the relevance of the system before and after the change, we retain some historical solutions in the previous search to form part of the initial population in differential evolution. Finally, verifying the effectiveness of the proposed approach by simulation experiments.