检索结果-南通市图书馆

Microstructural banding of directed energy deposition-additively manufactured 316L stainless steel

Journal of Materials Science & Technology 2021年第10期69卷 96-105页

作者： Yoon Hwa Christopher S.kumai Thomas M.Devine Nancy Yang joshua k.yee Ryan Hardwick kai Burgmann Department of Materials Science and Engineering University of CaliforniaBerkeleyCA94720USA Sandia National Laboratory LivermoreCA.94551USA

The microstructures of 316L stainless steel created by rapid solidification are investigated by comparing the similar microstructures of individual hatches of directed energy deposition additive manufacturing(DED-AM)and those of single,laser surface-melted tracks formed on a solid *** recoil pressure,which is exponentially dependent on the laser beam power density,induces convection of the melt pool,which causes formation of microstructural bands in the as-solidified *** microstructural bands are associated with changes in the chromium concentration and are a significant component of the inhomogeneous microstructure of DED-AM.

关键词： Additive manufacturing Directed energy deposition Stainless steel Rapid solidification Recoil pressure Microstructure

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

Inertial Entropy and External Validation of Clusterings

引用

Journal of Harbin Institute of Technology(New Series) 2024年第5期31卷 41-54页

作者： Dan Simovici joshua yee Computer Science Deptartment University of Massachusetts BostonBoston 02125USA

Axiomatization of Shannon entropy is a subject that has received lots of attention in the information theory *** Shannon entropy is defined on probability distribution,we define a new type of entropy on the set of partitions of finite subsets of metric spaces,which has a rich algebraic structure as a partially ordered *** propose an axiomatization of an entropy-like measure of partitions of sets of objects located in metric spaces,and we derive an analytic expression of this new type of entropy referred to as inertial *** approach starts with the notion of inertia of a partition and includes a study of the behavior of the sum of square errors of a *** this context,we characterize the chain of partitions produced by the Ward hierarchical clustering *** from inertial entropies of partitions,we introduce conditional entropies which,in turn,generate metrics on partitions of finite *** metrics are used as external validation tools for clusterings of labeled data *** metric generated by inertial entropy can be used to validate data clustering for labeled data *** type of validation aims to determine to what extend labeling of the data coincides with the clustering obtained algorithmically,and we obtain a high degree of consistency of the data labeling with the results of several hierarchical clusterings.

关键词： partition inertia hierarchical clustering generalized entropy

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

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

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：