阶段变异 meaning in English

stage variation

According to the rules and considerations which are based and taken into account in the practical work , this paper proposes a new model for distribution maintenance scheduling which intends to find the most economical maintenance schedule without violating any restrictions and also the paper makes a deep research of ga , sa and ts . by constructing two effective instructive rules which derive from the feature of distribution maintenance schedule and introducing ts into mutation operation of ga in the earlier generations , the proposed method improves the convergence of optimization and shortens the calculation time . the proposed model and method are applied to a practical system , and numerical results verify ' the correctness and validity of them
本文结合实际电力调度计划工作中检修计划的制定原则和所要考虑的各种因素，抽象出适合配电网检修计划优化的数学模型：对遗传算法、模拟退火算法以及禁忌搜索算法等多种算法进行了研究和分析比较，针对遗传算法的不足提出了通过对实际问题的分析抽象出一定规则指导算法在解空间进行搜索和两阶段变异算子两项改进措施，并应用于配电网检修计划优化，编制了相应的应用软件；应用该软件对我国南方某地区供电局某月的检修计划进行优化的结果表明，本文所提出的模型和改进的优化方法是正确和有效的。