适用于网络课程的矢量图平台的研究

探讨了如何实现一个适用于网络课程的矢量图平台，矢量图平台包括基于浏览器运行的客户端绘图环境，运行在网络服务器上的平台服务器。并阐述了设计开发过程中几个重点问题的研究和探索，提出了解决问题的方法和思路。主要论题为：系统体系结构；交互式绘图环境；图形数据的处理。     

基于J2EE的电子商务网构建技术及应用

分析了J2EE的对象模型以及主要技术 ,探讨了应用服务器的选择、体系结构模型及系统环境。基于J2EE的JSP Servlet Ejb Jdbc的三层结构 ,以农资电子商务网的业务需求 ,分析和设计电子商务网的基本框架。     

基于模型驱动的软件体系结构

介绍了一种基于模型驱动的软件体系结构。该体系结构将与实现技术无关的功能模型及基于某一特定技术的实现模型分离 ,通过不同模型之间的变换 ,使系统能适应技术的进步 ,解决系统在不同中间件平台上的集成、互操作性、可移植性等问题。此外 ,也讨论了这种体系结构的优缺点及今后需要解决的问题。     

舌形变截面增压器的平台试验与匹配特性

在分析舌形变截面蜗壳工作原理的基础上,提出设计构思。经平台试验可知,舌形挡板可变截面对柴油机性能具有多方面的影响,挡板开度过大增压器效率下降。用自行研制的舌形挡板增压器在WD615.61型柴油机上进行了外特性运行,结果表明;挡板最佳开度为4°～12°;在此开度运行,油耗率下降2％～3％,扭矩和功率均提高2％～3％。     

广州电力"十一五"传输网规划方案的探讨

电力传输网的建设是广州电力“十一五”通信规划的重点和难点,文章介绍了广州电力传输网的现状,分析了现有网络存在的主要问题,研究网络承载的业务,并综合电力实际的业务需求和未来发展,充分利用现有光缆资源,提出了“十一五”期间广州电力传输网的完善方案和新建设的传输网的规划方案,以及实际建设中应注意的问题,为电力传输网的构建与实施提供了依据。     

基于中等专业职业技术学校校园网解决方案

随着Internet技术的发展，网络已经逐渐成为人们生活的一部分。网络造就了新技术的进步，也给人们的生活方式带来了巨大的改变，而网络带给机会的同时也带来了很多问题，基于中等专业职业技术学校学生的特性，学生自我管制能力的差异，那么如何对网络进行管理、如何挖掘网络最大的资源、如果能促进学生更好的利用网络来学习，这些问题已成为校园网建设的新热点。     

基于Web的远程教学平台的设计与实现

本文介绍了一个基于Web的远程教学平台的设计与实现。该平台分为管理员模块、教员模块和学员模块等三个逻辑功能模块：物理实现上包括管理员子系统、个性化教学子系统、答疑子系统和考试子系统。个性化教学子系统采用适应性和智能技术动态生成个性化学习课件【1，2】，答疑子系统采用了同步智能答疑的技术，考试子系统突破了只能文字出题的限制，引入视频、音频和复杂数学公式等各类题目。该平台在“计算机基础”课程中得到初步实现。     

A multi-criteria assessment tool for screening preliminary product platform concepts

Platform concept evaluation is a more challenging task than evaluating a single product concept since a platform must effectively support multiple product variants over a prolonged period of time. Existing platform methods develop specific criteria in depth, yet an evaluation of alternative platforms should be based on a broad set of criteria. Based on expert interviews, personal experience, and a literature search we propose a platform assessment tool consisting of 19 criteria for platform evaluation. The criteria are group into six categories: customer satisfaction, variety, after-sale, organization, flexibility, and complexity. The tool is focused on the early platform architecture phase, before proof-of-concept prototyping. However, it can also be used subsequently for platform refinement when more data becomes available. We demonstrate our platform assessment tool through an example with a cordless drill platform.     

Daonity – Grid security from two levels of virtualization

The service oriented architecture of grid computing has been thoughtfully engineered to achieve a service level virtualization: not only should a grid be a virtual machine (also known as a virtual organization, VO) of unbounded computational power and storage capacity, but also should the virtual machine be serviceable in all circumstances independent from serviceability of any of its component. At present, a grid VO as a result of service level virtualization only is more or less confined to participants from scientific computing communities, i.e., can have a limited scale. It is widely agreed that for a grid to pool resources of truly unbounded scale, commercial enterprises and in particular server-abundant financial institutions, should also “go for the grid,” i.e., open up their servers for being used by grid VO constructions. We believed that it is today's inadequate strength of the grid security practice that is the major hurdle to prevent commercial organizations from serving and participating the grid.This article presents the work of Daonity which is our attempt to strengthening grid security. We identify that a security service which we name behavior conformity be desirable for grid computing. Behavior conformity for grid computing is an assurance that ad hoc related principals (users, platforms or instruments) forming a grid VO must each act in conformity with the rules for the VO constitution. We apply trusted computing technologies to achieve two levels of virtualization: resource virtualization and platform virtualization. The former is about behavior conformity in a grid VO and the latter, that in an operating system. With these two levels of virtualization working together it is possible to build a grid of truly unbounded scale by VO including servers from commercial organizations.     

基于J2EE的科技管理平台的设计与实现

J2EE和JAAS的结合应用可以为互联网的安全分布式应用系统的构建提供一个较好的解决方案。作者在科技管理平台的设计与实现过程中,采用J2EE和JAAS技术,实现了一个有较好安全保障的,集科技项目管理、专家信息管理和科技项目网上申报等功能于一体的网上分布式应用系统,并在实际使用中取得了较好的效果。