基于B/S和C/S混合模式的校园一卡通系统的设计与实现

信息技术的发展给高等教育的教学和管理带来了新的机遇和新的挑战,教育信息化已成为现代教育的一大方向。校园一卡通系统是推行校园信息化管理的重要组成部分之一,详细介绍B/S和C/S两种结构模式的工作原理和优缺点,同时结合校园一卡通系统的特点,探讨B/S和C/S相融合的模式结构在系统设计中的应用。     

盐步职校校园一卡通考勤系统的研究与设计

该文以盐步职校校园一卡通考勤系统的软件开发与研究的实际课题成果作为参考,提出了校园一卡通考勤系统进行软件设计的新方案,构建了基于B/S结构模式的考勤管理系统的网络和硬件平台,设计并实现了考勤信息的收集、管理、查询、统计、输出、备份等功能。     

基于TCP/IP协议的校园"一卡通"系统的设计

通过对"一卡通"系统的现状分析,提出了设计总体目标,系统平台设计方案,以及子系统的软硬件设计方法,设计采用网络化的设计思路,采用B/S结构,用户可以同过Internet直接使用校园"一卡通"的软件系统;同时对系统的安全性进行分析,提出提高系统安全性的方法.     

分布式数据库系统透明性的设计与实现

建设高水平的大学,校园教务管理系统的建设是重要的一环.本文介绍了基于B/S与C/S结构的分布式教务管理系统的设计思想及具体实现.主要针对多校区、地域分散的特点,重点阐述了分布式数据库系统透明性的设计与实现,其中涉及了分布式数据库系统的理论、B/S和分布事务管理、.NET程序设计技术在系统设计中的应用等.     

基于XMLRPC通信的一卡通系统

当今社会已经发展到数字时代,“一卡通”这种数字时代的产物已经发展起来。论文结合国家图书馆的数字图书馆“一卡通”工程,集中讨论了XML-RPC这种基于XML的通信技术在一卡通系统中的应用。主要从系统应用服务器和各个应用子系统间通信方面讨论此系统的结构。该系统结构能够克服当今许多一卡通服务器不能跨平台、可扩展差、数据传输安全性差的特点。该系统采用三层结构,各层之间以XMLRPC协议进行数据通信,这种结构能够使系统保持良好的模块性。此种系统结构能使交互界面更简洁、开发工具更灵活和方便。该一卡通系统架构不仅适用于图书馆,还可适用校园、银行、小区、政府等各行各业。     

基于C/S与B/S混合结构的学生综合素质测评系统

分析了目前高校学生综合素质测评工作的现状和特点。介绍了C/S结构和B/S结构的基本原理,并从6个方面对它们进行了比较。描述了系统需求,并在此基础上进行系统设计,决定采用基于C/S与B/S混合结构的进行软件开发,学生综合素质测评系统主要包括学生管理、成绩管理、操行管理、测评管理、评优评奖等核心业务功能模块,同时给出了系统实现中运用到的关键技术。     

关于高校校园一卡通系统技术的初步探讨

对校园一卡通系统的总体结构和校园一卡通系统的功能进行初步探讨校园一卡通系统的技术问题。校园一卡通系统的总体结构包括：系统主干平台,应用予系统和网络环境组成;校园一卡通的系统功能包括中心服务器,应用服务器,平台职能模块和应用子系统等。     

浅谈“校园一卡通”系统的发展与完善

本文结合高校应用“校园一卡通”系统的实际情况,对“校园一卡通”系统的优势与存在问题进行分析,以推动“校园一卡通”系统不断发展和完善。     

浅谈“校园一卡通”系统的发展与完善

本文结合高校应用"校园一卡通"系统的实际情况,对"校园一卡通"系统的优势与存在问题进行分析,以推动"校园一卡通"系统不断发展和完善。     

手机一卡通在高校数字化校园中的应用

本文就校园一卡通的特点进行了分析概括,通过分析校园一卡通的特点和应用,进一步指出了校园一卡通存在的优势和劣势,探讨了校园手机一卡通的数字化应用前景和方案     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.     

Editorial: Special issue on recent advances in hybrid control theory and applications

正The demands of a rapidly advancing technology for faster and more accurate controllers have always had a strong influence on the progress of automatic control theory.In recent years control problems have been arising with increasing frequency in widely different areas,which cannot be addressed using conventional control techniques.The principal reason for this is the fact that a highly competitive economy is forcing systems to operate in regimes where     

Information for Authors

正Aim The Journals of Zhejiang University-SCIENCE(A/B/C)areedited by the international board of distinguished Chinese andforeign scientists,and are aimed to present the latest devel-opments and achievements in scientific research in China andoverseas to the world’s scientific circles,especially to stimulateand promote academic exchange between Chinese and for-eign scientists everywhere.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.