检索结果-南通市图书馆

A New Algorithm for Reducing Dimensionality of L1-CSVM Use augmented lagrange method

Journal of Applied Mathematics and Physics 2022年第1期10卷 21-30页

作者： Mingzhu Cui Liya Fan School of Mathematics Science Liaocheng University Liaocheng China

Principal component analysis and generalized low rank approximation of matrices are two different dimensionality reduction methods. Two different dimensionality reduction algorithms are applied to the L1-CSVM model based on augmented lagrange method to explore the variation of running time and accuracy of the model in dimensionality reduction space. The results show that the improved algorithm can greatly reduce the running time and improve the accuracy of the algorithm.

关键词： Support Vector Machine Dimensionality Reduction augmented lagrange method Classification

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Structure Analysis of Locking Mechanism of Gear-Rack Typed Ship-Lift

引用

Wuhan University Journal of Natural Sciences 2006年第3期11卷 631-636页

作者： SHI Duanwei WU Qingming ZHANG Zhiqiang College of Power and Mechanical Engineering Wuhan University Wuhan 430072 Hubei China

Contact nonlinear theory was researched. Contact problem was transformed into optimization problem containing lagrange multiplier, and unsymmetrical stiffness matrix was transformed into symmetrical stiffness matrix. A finite element analysis （FEA） model defining more than 300 contact pairs for long nut-short screw locking mechanism of a large-scale vertical gear-rack typed ship-lift was built. Using augmented lagrange method and symmetry algorithm of contact element stiffness, the FEA model was analyzed, and the contact stress of contact interfaces and the von Mises stress of key parts were obtained. The results show that the design of the locking mechanism meets the requirement of engineering, and this method is effective for solving large stole nonlinear contact pairs.

关键词： ship-lift locking mechanism FEA augmented lagrange method ANSYS symmetry algorithm

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 of multibody systems based on the generalized-α projection method for DAEs

引用

Theoretical & Applied Mechanics Letters 2012年第6期2卷 61-64页

作者： Jieyu Ding Zhenkuan Pan College of Information Engineering Qingdao University Qingdao 266071China

Efficient optimization strategy of multibody systems is developed in this paper. Aug- mented lagrange method is used to transform constrained optimal problem into unconstrained form firstly. Then methods based on second order sensitivity are used to solve the unconstrained problem, where the sensitivity is solved by hybrid method. Generalized-α method and generalized-α projection method for the differential-algebraic equation, which shows more efficient properties with the lager time step, are presented to get state variables and adjoint variables during the optimization procedure. Numerical results validate the accuracy and efficiency of the methods is presented.

关键词： multibody system optimization augmented lagrange method differential-algebraic equa-tions generalized-α 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

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

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

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：