Stochastic and uncertain performance of power systems is thoroughly studied with a probabilistic simulation method in this paper . based on modeling of element failure and dispatching measures , static , dynamic and integrated securities are analyzed , and hence operation states are quantitatively classified . in probabilistic static security assessment , sequential and non - sequential monte - carlo sampling techniques are applied considering time varying parameter and constraints 本文采用概率仿真方法，深入研究了电力系统运行中的随机和不确定特性，在对元件随机故障和调度控制措施建模的基础上，对系统的静态安全、动态安全和综合安全进行概率评估，建立了电力系统运行状态的量化分析模型。
Their production plan levels and the characteristics are described , the improved algorithms for production order and mrp that are suitable for the demands of the production in fuda co . are developed . chapter four is focused on production scheduling . the production period planning and capacity planning in production are discussed respectively , and the method how to apply opt in production scheduling to optimize the control of production process is presented 第四章是混合型生产作业计划调度控制，首先讨论了生产作业计划调度在生产管理系统中的作用，进而结合富达公司的实际生产情况对生产周期的调度、设备能力的调度分别进行了讨论，最后讨论如何在生产过程中运用opt思想对生产过程中的“瓶颈”工序进行控制，从而对整个生产过程的关键工序和非关键工序生产作业计划调度进行优化。
