检索结果-南通市图书馆

Improved genetic algorithm for nonlinear programming problems

Journal of Systems Engineering and Electronics 2011年第3期22卷 540-546页

作者： Kezong Tang Jingyu Yang Haiyan Chen Shang Gao School of Computer Science and Technology Nanjing University of Science and TechnologyNanjing 210094P.R.China School of Computer Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003P.R.China

An improved genetic algorithm（IGA） based on a novel selection strategy to handle nonlinear programming problems is *** individual in selection process is represented as a three-dimensional feature vector which is composed of objective function value,the degree of constraints violations and the number of constraints *** is easy to distinguish excellent individuals from general individuals by using an individuals＇ feature ***,a local search（LS） process is incorporated into selection operation so as to find feasible solutions located in the neighboring areas of some infeasible *** combination of IGA and LS should offer the advantage of both the quality of solutions and diversity of *** results over a set of benchmark problems demonstrate that IGA has better performance than other algorithms.

关键词： genetic algorithm(GA) nonlinear programming problem constraint handling non-dominated solution optimization problem.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Topology optimization of supporting structure for seismic response reduction of an arch

引用

Science China(Technological Sciences) 2016年第6期59卷 852-861页

作者： MIYAZU Yuji OHSAKI Makoto TSUDA Seita Department of Architecture Hiroshima University Department of Architecture and Architectural Engineering Kyoto University Department of Design and Technology Okayama Prefectural University

A flexible supporting structure that reduces seismic response of an arch is proposed. Topology and cross-sectional areas of the supporting structure modeled as a truss structure are optimized through two steps of static and dynamic optimization problems. In the first step, a flexible supporting structure that has diagonal displacement at the top under horizontal load is obtained by solving static optimization problems. Then, in the second step, the cross-sectional area of the flexible member is optimized to minimize the seismic response acceleration of the arch evaluated by the complete quadratic combination(CQC) method. Time-history seismic response analysis is carried out to show that the response in the normal direction of the roof successfully decreases due to flexibility of the supporting structure; in addition, installing passive energy dissipation devices into the flexible supporting structure is very effective in reducing the tangential response of the arch.

关键词： topology optimization arch supporting structure truss nonlinear programming problem CQC method

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Optimization method for solving bang-bang and singular control problems

引用

控制理论与应用（英文版） 2012年第4期10卷 559-564页

作者： Shurong LI Ruiyan ZHAO Qiang ZHANG College of Information and Control Engineering China University of Petroleum

In this paper we study optimal control problems with the control variable appearing linearly. A novel method for optimization with respect to the switching times of controls containing both bang-bang and singular arcs is presented. This method transforms the control problem into a finite-dimensional optimization problem by reformulating the control problem as a multi-stage optimization problem. The optimal control problem is partitioned as several stages, with each stage corresponding to a particular control arc. A control vector parameterization approach is applied to convert the control problem to a static nonlinear programming （NLP） problem. The control profiles and stage lengths act as decision variables. Based on the Pontryagin maximal principle, a multi-stage adjoint system is constructed to calculate the gradients required by the NLP solvers. Two examples are studied to demonstrate the effectiveness of this strategy.

关键词： Bang-bang control Singular control Multi-stage problem nonlinear programming problem

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Switched System Optimal Control Based on Parameterizations of the Control Vectors and Switching Instants

Switched System Optimal Control Based on Parameterizations o...

引用

2011 Chinese Control and Decision Conference（CCDC）

作者： Rui-yan ZHAO,College of information and control engineering,China University of Petroleum,Dongying,257061,China.Shu-rong LI,College of information and control engineering,China University of Petroleum,Dongying,257061,China.

This paper presents a new approach for solving optimal control problems for switched systems with prespecified order of the sequence of *** such problems,we need to seek both the optimal switching instants and the optimal continuous *** optimal control problem for hybrid systems is transcribed into an equivalent problem parameterized by the switching instants and the control *** the discretization of the control space,the control vector is approximated by the B-spline *** order to search for the optimal switching instants,we introduce the normalized time variable and do normalized treatment for the control *** optimal switching control problem is converted to a nonlinear programming *** control profiles and switching instants act as decision *** examples are solved using the proposed method so as to demonstrate the effectiveness of the method proposed.

关键词： Switched systems Optimal control problem B-spline functions nonlinear programming problem

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：