检索结果-南通市图书馆

1998 International Conference on Communication Technology

作者： Zhang Fengxin senoir engineer Dalian Telecommunications Bureau

ISBN: (纸本)7800908275

＜正＞This article aims at solving the problem of "Coding Model" in data communications described with object *** author has invented and raised the adoption of near-circle "5-Dimensional Super-cubic Space" to solve this problem and further extend to even higher dimensional super-cubic *** model may also be referred to as code distance inter-network of "Hamming Code".By adopting this model to describe the "Coding" relation, a scries of important chaiacterisUcs and mathematical relations of the coding can be deducted,posing important application value to developing new "Data Coding Communications System".

关键词： data communication Hamming codes code distance inter-network coding model object method 5-dimensional super-cubic space Hamming code data coding communications system

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

Optimization of a High Speed Spinning Disk Spindle System for Minimum RRO,NRRO,and Lightweight by Using G.A.

引用

厦门大学学报(自然科学版) 2002年第S1期41卷 89-90页

作者： Y H Choi S T Kim K C Yoon J M Kim Y J Kang Dept.of Mechanical Design and Manufacturing Changwon National UniversityKyungnam 641-773Korea Dept.of Mechanical engineering Changwon National UniversityKyungnam 641-773Korea senoir research engineer R&D Cente FAGHANWHA Bearing Corp.Kyungnam 641-020Korea Graduate Student Dept.of Mechanical Design and ManufacturingChangwon National UniversityKyungnam 6412773Korea

Law level of RRO(Repeatable Run Out),NRRO(Non Repe at able Run Out),and lightweight construction are a major trend in the high-speed HDD(Hard Disk Drive)sytem to reduce track misregestration and to achieve high track density,which lead to succeed in the ***,it is not easy to r educe RRO,NRRO,and the weight of the spinning disk spindle system efficiently because lightweight construction and or bearing stiffness changes often yields a decrease in the static and dynamic stiffness of the system,and consequently hi gh vibrations may be generated as a ***,it is of importance to e valuate in advance the accurate dynamic behavior of the high speed spinning disk spindle system of a HDD *** study introduces an optimum design of the high speed spinning disk spindle system of a HDD for minimum RRO,NRRO,and lightweight construction using a gene tic *** spinning disk,hub,and bearing components of a HDD system ar e modelled as appropriate finite elements respectively and their equations of mo tion are derived to construct the system equations of the whole spinning disk sp indle system of the HDD *** RRO and NRRO responses of the spinning disk,due to exciting forces arised from ball bearing faults and rotating unbalance,are *** the design optimation,the hub thickness,the disk thickness,bearing positio ns(or bearing span)and bearing stiffness were set as design *** uni que objective function is obtained by multiplying an appropriate weighting facto r by multi-objective functions,such as RRO,NRRO,and the total weight of HDD the *** constraints are maximum RRO limit,maximum weight linit,and the critical speed limit of the HDD spindle *** show that the RRO,NRRO,and weight are reduced by 6%,66.7%and 28%r espectively compared with the initial design of the HDD ***,thi s present study can be used for an optimum design of the spinning disk spindle s ystem of a HDD for lightweight construction

关键词： design optimization genetic algorithm multiobjective optimization repeatable run out non repeatable run out

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

A newly discovered deepwater goby of the genus Discordipinna from Ryukyus,Japan

A newly discovered deepwater goby of the genus Discordipinna...

引用

中国海洋湖沼学会鱼类学分会、中国动物学会鱼类学分会2012年学术研讨会

作者： I-Shiung Chen Toshiyuki Suzuki Kwang-Tsao Shao Institute of Marine Biology National Yaiwan Ocean University Kawanishi-midoridai senoir High School 1-8 KouyoudaiKawanishiHyogo 666-0115Japan Biodiversity research Center Academia Sinica

In the 2009,Kumejima Expedition of Japan,a very rare marine goby was collected by trawling net about 80 m depth during deepwater marine biodiversity collections of coral-reef *** newly discovered species,Discordipinna... 详细信息

关键词： A newly discovered deepwater goby of the genus Discordipinna from Ryukyus,Japan

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

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：