In this paper, a mathematical model for topology optimization oftruss structures with constraints of displacement and systemreliability under multiple loading cases is constructed. In order toavoid the difficulty of c...In this paper, a mathematical model for topology optimization oftruss structures with constraints of displacement and systemreliability under multiple loading cases is constructed. In order toavoid the difficulty of computing the structure's system reliability,a solving approach is presented in which the failure probability ofsystem is divided into the sum of a all bars' failures probability bymeans of reliability distribution. In addition, by drawing into thereliability safety factor and the fundamen- tal relationship instructural mechanics, all probability constraints of displacement andstress are equiv- alently displayed as conventional form and linearfunction of the design variables.展开更多
叙述了基于Web的在线辅助学习系统的总体结构,以及各模块功能的定义,提出了采用三层体系架构(Browse/Application Server/Database Server)的开发模式,利用ASP.NET技术设计动态网页,ADO.NET技术访问数据库,后台使用SQL Server 2005存储...叙述了基于Web的在线辅助学习系统的总体结构,以及各模块功能的定义,提出了采用三层体系架构(Browse/Application Server/Database Server)的开发模式,利用ASP.NET技术设计动态网页,ADO.NET技术访问数据库,后台使用SQL Server 2005存储和管理数据库。展开更多
基金the National Natural Science Foundation of China
文摘In this paper, a mathematical model for topology optimization oftruss structures with constraints of displacement and systemreliability under multiple loading cases is constructed. In order toavoid the difficulty of computing the structure's system reliability,a solving approach is presented in which the failure probability ofsystem is divided into the sum of a all bars' failures probability bymeans of reliability distribution. In addition, by drawing into thereliability safety factor and the fundamen- tal relationship instructural mechanics, all probability constraints of displacement andstress are equiv- alently displayed as conventional form and linearfunction of the design variables.
文摘叙述了基于Web的在线辅助学习系统的总体结构,以及各模块功能的定义,提出了采用三层体系架构(Browse/Application Server/Database Server)的开发模式,利用ASP.NET技术设计动态网页,ADO.NET技术访问数据库,后台使用SQL Server 2005存储和管理数据库。
