通过层次化模块化分解技术，将复杂系统动态故障树分解为相互独立的模块，对独立模块分别进行可用度求解，再利用自下而上递归的方法实现复杂系统可用性分析。提出和推导出等效时变的可用度参数模型，分析了层次化模块化可用性分析方法的误差成因和相关影响，给出了故障相关和维修相关条件下的误差定义，定量研究了误差分布区域及其影响因素，提出了层次化模块化可用性分析方法的适用条件和应用原则，实例分析证明了该方法的有效性。

提出面向对象的计算机辅助故障模式影响分析（CFMEA）方法，建立了控制系统仿真模板，将其数据、操作和性能封装成一个对象，对象间通过属性进行因果推理，实现FMEA向故障树（FTA）的自动转换。引入控制系统性能可靠性概念，建立控制系统性能和功能综台可靠性模型，开发相应的解算方法。实例分析证明了基于仿真模板的控制系统可靠性分析的有效性，综合了功能和性能可靠性分析的优点。

This paper establishes the accelerated life testing model, viz. the hybrid Weibull distribution model under multi-stresses (pressure, velocity and temperature) for typical mechanical product-aerial hydraulic pump. Direct toward the optimization difficulties with multi-parameters in Maximum Likelihood Estimation (MLE), this paper presents an Improved Float Genetic Algorithm (IFGA), which adopts the fuzzy algorithm in the float genetic algorithm to approach the global optimum solution. Application denotes that IFGA not only can obtain the global optimum solution but also can shorten the calculation time greatly.

Advanced computer network can realize the bulk data transfer and real time control with high reliability and precision. Its availability not only depends on the connectivity of topological structure but also resies on its operational performance. Based on new network description, this paper provides the availability model of link and nodes that can be calculated with Generalized Stochastic Petri Net (GSPN). The main contribution of this paper focuses on the routing selection and performance evaluation. Working on the network performance by queueing theory, it concludes that the throughput and time delay are two impurtant performance indices in network. With Power formula, this paper presents the integrated availability model considering both topologic reliability and operational performance, which can realize the availability analysis perfectly from the point of view of a user.