基于MIDP的HTTP协议编程及其应用

文章介绍了一种HTTP网络协议在J2ME中的实现方法,并在此基础上设计了一个手机天气预报查询应用程序。文中对该程序设计中所涉及到的各种类库及主要接口和对象都进行了详细介绍,所开发的程序能够较好地实时获取网络上的24、48、72小时天气预报数据,最后给出了程序在仿真器与手机运行情况。     

谈 XML 文档及动态产生该文档的几种方法

本文分析了传统数据库应用的局限性并介绍了可扩展标记语言XM L,进一步分析了XML在互联网不同系统间数据交换的优越性以及动态产生XML文档的几种方式.     

An Approach to Share Architectural Drawing Information and Document Information for Automated Code Checking System

The purpose of this study is to suggest a way of optimized managing and sharing information between standard architectural drawings and construction documents in Korea architectural industry for automated code checking system by linked STEP and XML. To archive this purpose, the authors have analyzed current research and technical development for STEP and XML link and developed a prototype system for sharing information between model based drawings and XML based construction documents. Finally, the authors have suggested practical use scenario of sharing information through linked STEP and XML using test case of automatic code checking. In the paper, the possibility of constructing integrated architectural computing environment through exchange and sharing of drawing information and external data for the whole building life-cycle, from the conceptual design stage to the construction and maintenance stage has been examined. Automated code checking through linked STEP and XML could be enhanced through col-laboration business, more completed code, improved building performance, and reduced construction costs.     

The exchange from relational schemas to XML schemas based on semantic constraints

XML is the standard format for data exchange between inter-enterprise applications on the Internet. To facilitate data exchange, industry groups define public document type that specify the format of the XML data to be exchanged between their applications. In this paper, we propose a new method to solve the problem of automating the conversion of relational data into XML. During the conversion, we considers not only the structure of relational schemas, but also semantic constraints such as inclusion dependencies during the translation--it takes as input a relational schema where multiple tables are interconnected through inclusion dependencies and converts it into an X-Schema. Finally, in order to validate our proposal, we present experimental results using real schemas.     

一种基于竞标机制的异构无线网络选择模型

异构无线接入网络选择问题是下一代无线网络关键技术之一,也是多网融合的基础。本文在讨论市场竞标机制的基础上,总结了异构网络选择准则,设计了基于竞标机制的异构无线网络选择模型和竞标机制,仿真结果表明其具有好的网络选择效果。用户偏好和运营商的价格管理策略能有效地作用在异构无线网络选择中。     

基于XML的数据安全保护技术

在面向Internet环境的数据库安全方面,该文主要研究了内涵级的XML数据安全保护技术.在XML访问控制方面,改进了现有模型中授权主体的定义范畴,同时将请求评估模块和决策执行模块显式分开,增加了定制安全策略和安全规则的灵活性和通用性.探讨了利用XML对文档进行数字签名和对签名进行校验,以及对XML文档加解密的方法,并利用这些技术实现了一个基于Java通用平台的XML数字签名和加密原型系统.     

基于STLinux和MiniGUI的OSD设计

通过分析目前市场上主流的嵌入式图形库,采用移植第三方图形库MiniGUI,实现STLinux高清机顶盒上的图形用户界面（GUI）．在界面的整体规划中,充分考虑到OSD数据与程序逻辑的可分离性,提出了对OSD数据采用XML语言描述;通过移植mini—XML对属性数据文件进行解析,实现了程序数据到代码的重定位．该方法克服了传统界面开发模式中频繁编译调试的缺点,在OSD开发中具有很强的实用性与高效性．     

基于中间件的科技查新辅助检索系统的研究与设计

本文阐述了科技查新辅助检索系统的目的与意义,采用了基于中间件的异构数据库集成方案,有效地解决了科技查新中异构数据库一站式检索的问题。     

用Android设计手机快餐服务程序

在移动互联网上Android手机是非常出色的。在Android程序设计中,定位服务很酷,在使用GPS中,可以嵌入你自己的应用程序在其中,做一些很有意义的事情。在这篇文章里,我们将快餐服务放进来,从而实现在Android应用程序里使用GPS、Google地图、xml文件获取和解析等应用,通过编程来达到我们的目的。