课程文献中心 更多>>

关键词： 基础水文数据库表   水文   数据库   结构   标识符  

标准号: SL 324-2005

摘要： 本标准适用于全国各级水文单位和其他单位的基础水文数据库建设,以及与其相关的数据查询、信息发布和应用服务软件开发。

关键词： 数据库   水文数据库   数据库表   结构   标识符  

标准号: SL 323-2005

摘要： 本标准适用于各级水文部门,防汛抗旱部门、水利水电工程部门可参照执行。

关键词： 西门子   传输设备   华为   对接   通道踪迹字节   高阶通道   连接状态   十六进制   默认值   标识符   接入点   发送端   接收端   相匹配  

摘要： 1 J1、C2字节(1)J1字节J1字节即通道踪迹字节,VC-4的第一个字节.J1字节用来重复发送高阶通道接入点标识符,使该通道接收端能据此确认与指定的发送端处于持续连接(该通道处于持续连接)状态.也就是说,只有收发两端的J1字节相匹配,该通道才会处于持续连接状态.J1字节可按需要来设置.华为设备发/收J1字节的默认值是'HuaWei SBS',西门子设备发/收J1字节的默认值是'00(十六进制)'.

关键词： pixel parallel   image processing   pattern matching   fingerprint   sensor  

摘要： This paper describes pixel-parallel image-matching circuit schemes that provide the optimal binarization, the high-speed low-power comparison, and the accurate matching of fingerprint images needed for fingerprint verification. Image binarizing is adjusted adaptively during the fingerprint sensing operation. The obtained image is compared with the template in the pixel array, and the results from all of the pixels are totaled by a variable-delay circuit at high speed and low power. For accurate matching, the image is scanned by shifting it in the pixel array while maintaining whole image. The experimental results demonstrate that the proposed schemes provide optimal binary images of most fingers under any condition and environment, 11-mu s 147-mu W totaling of results from 20,584 pixels, and wide-range image scanning and accurate matching for fingerprint images. These schemes are effective for fast and low-power fingerprint verification for a single-chip fingerprint sensor and identifier.

关键词： Smart cards  

摘要： Researchers from HP Laboratories and STMicroelectronics collaborated with Incard to develop technology for the implementation of Identifier-Based Encryption (IBE) on smart cards. The partners implemented IBE by using elliptic-curve pairing functions, which are important cryptographic primitives. IBE uses bilinear mapping on elliptic curves to obtain an algorithm that can be used to turn a simple, well recognized identity or role into a public/private key pair. This role-based encryption allows for one party in the communication to dynamically change the link between the identity and the role of the user without impacting the other party.

关键词： 安全标识符   活动目录   相对标识符   访问控制表   账号  

摘要： 自从有了WindowsNT版本,就开始有安全标识符。Windows操作系统实际上不是通过用户的名字而是通过用户的安全标识符来识别用户。本文讨论安全标识符的概念、功能、组成、查看方法以及在网络安全方面的应用。

关键词： 图标   Windows   快捷方式   我的电脑   标识符   文件   桌面   程序   箭头  

摘要： 图标是文件的标识符．形象的图标可以直观地告诉我们文件(或程序)类别．功能，如看到桌面上“我的电脑”这个图标、我想即使初次使用电脑的人也很容易知道它是指的什么。漂亮的图标更可以带来美好的视觉享受。但是在默认情况下．系统创建图标也许并不令人十分满意．比如在桌面新建一个快捷方式．Windows会在创建的快捷方式名称前面添加“快捷方式”的文字．它的图标下方还会带上一个小箭头的“烙印”．看上去挺不美观的。其实我们只要动动手．就可以让这些图标更“听话”。

关键词： UMTS   接入   UTRAN   鉴权   3GPP   信令   完整性保护   标识符   攻击   加密  

摘要： 根据3GPP提出的3G安全结构中所重点描述的网络接入安全技术规范,介绍了包括双向鉴权、使用临时标识符、UTRAN加密和信令的完整性保护在内的UMTS接入的各种安全机制,提出在UMTS中应用因特网监控入侵的检测技术来防范非法用户的攻击。

关键词： JAVA (Computer program language)   SOURCE code (Computer science)   VISUAL programming languages (Computer science)   COMPUTER software  

摘要： The article informs that IBM and Sun Microsystems Inc. are responding to that reality with Java environments that are not merely competitive but actually set a fast pace for the Visual Studio update that Microsoft Corp. won't ship until late this summer. IBM's Rational Web Developer 6.0 speeds construction of data-driven storefronts; Sun's Java Studio Enterprise 7 features innovative aids for team efforts and excellent interaction among visual and text-based tools. Sun has gone the extra mile to enable intuitive browsing and reorganization of diagrams. UML views retain familiar editing behaviors. Adding a message between two entities on a diagram, for example, triggers the code completion tips that developers expect to see in a source code view. IBM's eclipse 3.0-based RWD 6.0, released in November, and emphasizes the connection between the user experience and the source code in much the same way that JSE 7 emphasizes the connection between the source code and UML visualizations. RWD's, refactoring capabilities are extensive, with a longer list of available operations than those provided by JSE.

关键词： 数字图书馆   唯一标识符   DOI信息集成  

摘要： 数字资源唯一标识符(Digital Resource Unique Identifier,DrUI)提供了因特网对象可靠、持久和唯 一的标识方案,比较经济地实现不同应用系统直接的互操作。本文综述了以IDF(Internet DOI Foundation)的 DOI(Digital Object Identifier)方案和清华同方的标识码为代表的国内外DrUI的研究和应用部署现状,针对国内 数字出版、参考引文链接和数字权益保护的需求,比较了3种部署DrUI应用的方案,并在此基础上提出我国发 展DrUI系统的战略,从管理机制、技术体系和标准化等方面论述了我国DrUI的发展思路。