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关键词： 档案著录   档案检索工具   句法分析   邮件列表   标准通用置标语言   浏览器   数字档案馆   国会图书馆   机读目录   标识符  

摘要： ２０年前，美国开始着手档案著录的标准化。国会图书馆开发的ＵＳＭＡＲＣ－ＡＭＣ（机读目录档案与手稿控制）格式曾一度结束了美国档案著录各自为政的局面。但是，实践表明ＭＡＲＣ－ＡＭＣ并不能令人满意。因为它毕竟起源于图书馆的自动化系统，在应用于档案著录，尤其...

关键词： 总线   节点   标识符   CAN总线   分布式测控系统  

摘要： 介绍了ＣａｎＢｕｓ（ＣＡＮ总线）的基本原理、总线结构、通讯协议、数据格式，并以ｐｈｉｌｉｐｓ公司的８２Ｃ２００、８２Ｃ２５０接口芯片为例，给出了ＣＡＮ总线接口电路的实现方法和软件控制程序编程示例。

关键词： copyright   electronic publishing   identification   information management   Internet  

摘要： The management of intellectual content in a digital environment (Internet) requires the existence of persistent, reliable unique identifiers for each distinguishable piece of content, and associated services activated by these identifiers to manage access and other rights. The digital object identifier (DOI) is a major initiative from the content industries which is now being implemented widely. The DOI is a unique identifier of any piece of intellectual content (in any form), together with a system for using that identifier to locate digital services (on the Internet) associated with that content. This paper describes as separate strands the approach of the technology and the content communities, and how these have been brought together in the DOI initial implementation (as a reliable location tool) and future implementations of other services. The DOI has strong support from many quarters, and is funded by a not-for-profit independent foundation.

关键词： 标识符   软件复制   显示屏   处理器   连线   业界  

摘要： 一旦所有CPU都拥有了标识符,对软件复制的保护将得以恢复。

摘要： Provides information on the Digital Object Identifier (DOI), an initiative that grew out of discussions on electronic publishing. Key to understanding the significance of the DOI as an initiative; Parts that are included in the syntax of DOI; Issue on how to incorporate users into the DOI system.

关键词： 聚簇索引   唯一性   叶级   标识符   数据表   执行规划   复合索引   查询语句   向导  

摘要： 索引是一种加快检索表中数据的方法。数据库的索引类似于书籍的索引。在书籍中,索引允许用户不必翻阅整本书就能迅速地找到所需的信息。在数据库中,索引也允许数据库程序迅速地找到表中的数据,而不必扫描整个数据库。在书籍中,索引就是内容和相应页号的清单。在数据库中,索引就是表中数据和相应存储位置的列表。索引可以大大减少数据库管理系统查找数据的时间。索引调整向导是一种工具,它通过使用查询优化器来分析查向任务的工作量,向有大量工作量的数

关键词： State estimation  

摘要： Ways and methods of decomposition, identification, and construction of state identifiers of an n-mass electromechanical system are considered. Principles used as the basis of the developed method, namely, definition of representative modes with appropriate coordinate conversion are discussed.

关键词： 通信设备   编码   通信网   编码规则   数据传送   开放系统互连   数据网络   ASN.1   电信   信息技术  

标准号: ITU-T X.691 AMD 1-1999

关键词： 信息技术  

标准号: ITU-T X.690 AMD 1-1999

摘要： Provides information on the identifiers that were developed to provide standardization in the publishing industry. Issue regarding the concept of an International Standard Book Number; Other identifiers that are important to the intellectual property industry; Key identifiers for the intellectual property industry.