计算机辅助技术

0313406基于XML实现数学内容到MathML代码的自动转换 [刊]/华泽//微型机与应用.—2003,22(1).—36～38(K)基于XML对MathML进行了研究,实现了从数学内容到MathML语言代码的自动转换,讨论了Web上数学内容的显示、存储及交互问题。参2     

HTML5和CSS3.0在网页设计中的新特性和优势探讨

HTML标记语言具备简易、强大等特征,在互联网的各个阶段均发挥着不容忽视的重要作用。HTML标记语言的最初状态仅是非常简单的新闻列表,发展至今已经成为了复杂程度较高的在线表格应用,同时与CSS、Java等程序相结合,可通过简易的标记语言设计并创造出各类实用的应用。     

印刷体文档中的数学公式识别方法综述

数学公式识别是将中文电子文档中包含的数学公式识别出来的方法.印刷体文档中的数学公式识别是由预处理,数学公式的抽取分割定位和结构分析识别3部分组成.主要介绍了目前数学公式识别的研究现状,并对已提出的各种成熟识别方法进行总结.     

XML规范及网络应用

如今，网络时代在飞速发展，传统的网络已远远不足以表达自然界复杂的信息，简单的语言再也不能表达一些细微的差异，因而亟待更完整的语言来表达网络信息的内涵。“可扩展标识语言”——XＭＬ又ｅXｔｅｎｓｉｂlｅ Ｍａｒｋｕｐ Ｌａｎｇｕａｇｅ）便由此应运而生，它的出现把网络表达的语言集合推进了一大步。首先让我们来认识一下什么是标记语言，标记语言不同于一般的控制流程序设计语言，基本上可以被视为是一种数据流的文档结构描述语言。在计算机处理过程中，标记语言的标记既可以作为数据，也可以作为控制语句来使用。 例如，我们…     

基于FPGA的二值图像连通域快速标记

针对连通域标记算法运算量大、速度慢、硬件实现困难的缺点,提出一种适于现场可编程逻辑门阵列（FPGA）实现的二值图像连通域快速标记的算法,并用VHDL硬件开发语言在XILINX公司的FPGA上实现。实验结果表明了该算法能对二值图像复杂的连通关系正确标记,易于硬件实现,大大节约了硬件资源,电路结构简单,满足实时性要求。     

Web网页制作技术讲座(三)——网页设计与Java编程

一、什么是网页 当你使用WWW浏览器在Internet中畅游时,计算机屏幕上映入你眼帘的异彩纷呈、充满活力的画面就是网页。网页在计算机上是一个文件,编写网页用HTML语言。HTML(Hyper Text Markup Language),又称超文本置标语言或超文本标记语言。所谓超文本是指编辑出的文件仍然是ASCⅡ字符集的文本,但文本中增加了超链接,这些超链接将Internet的网址、图形图像、声音、动画等文件甚至是Java小程序等内容链接到文本中来;所谓置标是指将以上内容链入文本的规范化语法标记,浏览器通过这些标记     

非相干测距技术在无人机测控中的应用

在无人机测控系统中,通常采用相干测距技术。相干测距技术原理简单,但是会对无人机测控系统带来一些问题。通过数学公式推导,给出了非相干测距原理的数学公式,并进一步推导了非相干测距的具体实现的数学公式,给出了非相干测距的性能指标。通过具体设计,在无人机测控系统实现了非相干测距,很好地解决了相干测距带来的问题。     

基于数学形态学的数学公式图像分割系统

数学公式图像识别的难点之一是数学公式分割.数学公式通常是由特殊的字符、希腊字母、英文字母和一些数字组成的复杂的结构体,大大增加了图像分割的难度.本文将数学形态学的思想引入到公式图像分割的算法中,通过对数学公式图像的细化操作,然后递归水平、垂直投影进行公式字符分割.实验表明,该方法能够有效的对数学公式进行分割.     

XML标记语言在设施农业技术中的应用

文章介绍了应用于设施农业信息平台的设施农业技术标记语言-IATML的设计过程。在分析了设施农业技术的构成元素的基础上对设施农业技术的构成元素进行了定义，建立了设施农业技术标记语言的法律性文档-DTD。规范了设施农业技术的描述方法。     

数字信号处理课程的教学方法探讨

数字信号处理课程的内容非常丰富,使用到众多的数学工具,学生在学习的过程当中感到枯燥.对课程当中数学工具的简化教学显得特别重要,尤其是在有限的教学学时这一前提条件下.数字信号处理课程各章节内容前后衔接的很紧凑,授课时应当注意内容的承上启下.由于数学公式繁多,授课时可结合实际的物理现象对课程中数学模型进行讲解,让学生对所学的知识点有一个直观认识.Matlab软件方便了本课程当中数学公式的计算机计算及仿真,课堂上分配一定的学时对该软件进行介绍,可以让学生课后对数学公式进行计算或仿真验证,加深对所学知识的印象.     

VoiceXML and the W3C speech interface framework

VoiceXML is a markup language for creating voice-user interfaces. It uses speech and telephone touchtone recognition for input and prerecorded audio and text-to-speech synthesis (TTS) for output. It's based on the World Wide Web Consortium's (W3C's) Extensible Markup Language (XML) and leverages the Web paradigm for application development and deployment. By having a common language, application developers, platform vendors, and tool providers all can benefit from code portability and reuse. The paper discusses VoiceXML and the W3C speech interface framework.     

Orchestration in Web Services and Real-Time Communications

Web services orchestration is now being adopted for the coordination of real-time communications services, including telephony, video and multimedia communications. But do these communications services integrate into workflows in the same way as Web services in the data environment, and are orchestration mechanisms for Web services sufficient for the needs of workflows that involve real-time communications? In this article we explore these questions by taking a look at three approaches to orchestrating workflows: Business Process Execution Language (BPEL), Call Control extensible Markup Language (CCXML), and State Chart extensible Markup Language (SCXML). Through an analysis of these languages, we find that although there are similarities between BPEL as a Web services orchestration language and CCXML/SCXML as orchestration languages for telecom applications, certain key differences, namely procedural vs. event-based representation and coarse vs. fine task granularity, make it more suitable to use these two types of languages together rather than having one replace the other in converged voice-data applications.     

XML and Web Services Security Standards

XML and Web services are widely used in current distributed systems. The security of the XML based communication, and the Web services themselves, is of great importance to the overall security of these systems. Furthermore, in order to facilitate interoperability, the security mechanisms should preferably be based on established standards. In this paper we provide a tutorial on current security standards for XML and Web services. The discussed standards include XML Signature, XML Encryption, the XML Key Management Specification (XKMS), WS-Security, WS-Trust, WS-SecureConversation, Web Services Policy, WS-SecurityPolicy, the eXtensible Access Control Markup Language (XACML), and the Security Assertion Markup Language (SAML).     

Query by templates: using the shape of information to search next-generation databases

We present a user-centered database query language called QBT (Query By Templates) for user communication with databases containing complex structured data, such as data stored in the Extensible Markup Language (XML). XML has revolutionized data storage as well as representation and transfer methods in today's internet applications. The growing popularity of XML as a language for the representation of data has enabled its use for several applications involving storage, interchange, and retrieval of data. Several textual query languages have been proposed for XML retrieval, including the World Wide Web Consortium's (W3C) recommendation of XQuery. Native XML database systems have been implemented, all of which provide methods for user communication with the database, although most communication methods use text-based query languages or form-based interfaces. QBT, the language presented here, is one of the first attempts toward a generalized alternative language that is based on human factors of familiarity. It is ideal for documents with a simple yet highly recognizable layout (e.g., poems, dictionaries, journals, etc.). We present the QBT language and report results from an initial usability test that shows promise for this type of an interface as a generalized user-database communication method.     

一种对Web遗留系统透明的单点登录方案

单点登录（SingleSignOn,SSO）给用户带来极大的方便,但Web遗留系统（Legacy）往往由于无法进行修改而不能提供SSO支持。提出的面向web遗留系统的透明单点登录解决方案,利用web过滤器技术,结合安全断言标记语言（SAML）协议和安全的口令代填,可以在不需要修改原有系统的情况下,实现单点登录,而且能实现自动账户绑定。这里提出的方案是一种解决Web遗留系统单点登录问题的既简单又有效的方案。     

基于MATLAB Web Server的数字图像处理仿真实验

MATLAB Web Server应用程序集成了MATLAB程序与Web应用系统的优点,是M文件、HTML语言和图形的结合体。以"图像的线性变换"为例介绍了MATLAB Web Server工作环境的配置以及适用于《数字图像处理》课程的远程仿真实验开发的一般方法和流程。     

浅析数据库与XML的结合

XML逐渐成为互联网上数据描述和交换的标准，它将成为Web上存放数据的主要格式。本文分析了XML与数据库的关系，并阐述了XML在SQL Server中的支持现状。     

Math on the Internet

Engineering math may have changed little since slide rules were traded in for computers, but math software continues to evolve, driven by the rapid progress of computers and by competition among software vendors. Perhaps the most interesting developments have been the emergence of new ways to publish documents containing math on the World Wide Web and the changes in math programs that have resulted. The paper considers how the evolving mathematical markup language plus add-ons to leading software are spurring computational sharing on the World Wide Web     

WEB与数据库动态信息交换的CGI实现

探讨Ｗｒｂ服务与后台数据库信息的交换技术，给出客户既能浏览Ｗｅｂ服务器上的信息又能访问后台数据库的方法。该方法通过ＨＴＭＬ超文本标记语言的数据采集表ＦＯＲＭ接收用户的数据，并将这些数据提交给服务器，服务器再将其传递给ＣＧＩ程序，执行ＳＱＬ语句来实现对数据库的访问，并且在ＣＧＩ程序中将取回的记录转换成ＨＴＭＬ格式，再经服务器送给浏览器。