简析基于网络的学生作业管理系统设计

在网络技术日益成熟的背景下,我国教育事业从中受益匪浅,正朝着信息化的方向不断迈进.在教育教学工作中,学生作业管理是一项十分重要的工作,但是,这方面的软件开发却远远落后于实际需要,有鉴于此,本文将针对基于网络的学生作业管理系统设计展开探讨,旨在弥补这方面的不足,从而促进教育教学事业的更好发展.     

基于Web的中药化学数据库

为了研究中药以及通过WWW来交流中药的相关信息,开发了中药化学数据库和基于Web的检索程序。本文简单介绍了中药化学数据库,说明了在开发程序中所使用的各种技术,包括ASP、VRML和JavaScript。另外还给出了一些应用实例。     

Comparing computerized versus traditional psychological assessment

This study utilized a Latin Squares design to assess the equivalence of computerized testing methods compared to traditional pencil-and-paper formats in a clinical setting. Subjects were given an intake interview and three personality assessment instruments by either of the two administration formats at one week intervals. Subjects also completed a post-assessment evaluation instrument (semantic differential) to gauge their reactions to the testing experience. Data analysis indicated no significant differences between scores on measures of anxiety, depression, and psychological reactance, either across group or administration format. Importantly, while producing comparable results to the pencil-and-paper assessment, the computerized administration was preferred over the pencil-and-paper administration by 85% of the subjects. Discussion emphasizes the implications of this study as support for the use of computerized assessment in applied psychology.     

A measure of cross-training benefit versus job skill specialization

Given ever-higher labor costs, organizations should periodically assess the match of personnel skills and quantities with required duties. Consolidating similar functional specialties can improve efficiency by increasing staffing for high-demand jobs, or by identifying areas where staff may be reduced. However, such consolidation activities are often done anecdotally, and can potentially overlook successful skill pairings. We propose a model that enables an objective, repeatable skills consolidation assessment process. Our model—a cost/benefit ratio—identifies skill pairings which are likely to merge successfully, by comparing the costs of training to the benefits of increased staffing level efficiencies for these jobs.     

Web应用环境中的系统可用性设计

企业越来越依赖于信息系统，保障信息系统的连续可用性，是信息系统设计和管理的重要目标。给出了企业高可用性需求定义的方法，并在深入分析了当前各种高可用性技术优缺点的基础上，就当前主流的Web构架应用环境的高可用性设计方法作了论述，并给出了相应设计模型。     

Pull-down versus traditional menu types: an empirical comparison

An experiment was conducted to test the performance of pull-down versus traditional or explicit menus. Sixty subjects, including novice and experienced computer users, manipulated both types of menus to complete banking tasks similar to those found on Automatic Teller M achines. The order of the menus was randomly varied to control for learning effects. Across both types of users, traditional-style menus elicited fewer errors than did pull-down menus; however, no significant difference was found in the time to complete the banking task. Experienced users outperformed novice users in the amount of time taken to complete the task regardless of menu type, though no difference was found in the number of errors committed by both user types.     

Pull-down versus traditional menu types: An empirical comparison

An experiment was conducted to test the performance of pull-down versus traditional or explicit menus. Sixty subjects, including novice and experienced computer users, manipulated both types of menus to complete banking tasks similar to those found on Automatic Teller M achines. The order of the menus was randomly varied to control for learning effects. Across both types of users, traditional-style menus elicited fewer errors than did pull-down menus; however, no significant difference was found in the time to complete the banking task. Experienced users outperformed novice users in the amount of time taken to complete the task regardless of menu type, though no difference was found in the number of errors committed by both user types.     

基于Web的CAGD计算机辅助教学系统

计算机辅助几何设计(CAGD)是一门理论联系实际、抽象思维与形象思维相结合的工程基础课程,同时具有很强的理论性和实践性,需要采用计算机辅助手段辅助教学,达到较理想的效果。该文提出了一个采用Java相关技术实现的基于Web的CAGD计算机辅助教学系统,系统具有分布性、实践性、人机交互性和综合性,可作为校内CAGD课程教学的辅助工具,也可用来进行远程教学。     

基于Web的数据库模糊优化查询

针对一种Web数据库访问模型，提出一种基于Web的数据库模糊优化查询法，以适应网上普通用户信息查询需求，能较有效地改善网上信息查询查准率低的状况。     

基于Web应用系统的评测方法和技术

在现有Web服务器的评测方法和技术基础上对Web应用系统进行性能测试的一些研究，主要定义了一套测试基于Web的应用系统的术语和性能指标集，并提出了性能测试的总体方案，对生成工作负载的相关问题也作了简要的说明。     

Web-based Procurement New Roles for Intermediaries

The electronic markets vs. electronic hierarchies debate initiated by (Malone et al. 1987) has been superseded by the discussion about dis- or reintermediation in the electronic marketplace. Many of the arguments given for either side are equally correct—because the arguments have been applied to different domains in different situations from specific perspectives—and yet the debate falls short of covering the complexity and dynamics of the ongoing market structure change. The goal of this paper is therefore to develop a more differentiated framework that facilitates the understanding of chances and threats resulting from inter- and cybermediation. The framework suggests to distinguish roles, opportunities and threats for cybermediaries in different situations. While the framework is meant to structure the debate in general, we will focus on public sector procurement to show its application.     

Objective versus subjective measures of Paris Metro map usability: Investigating traditional octolinear versus all-curves schematics

Schematic maps are an important component of assistance for navigating transport networks worldwide. By showing routes as simple straight lines, they reduce the cognitive load of journey planning, and by revealing the underlying structure of networks, they make their key features easier to identify and learn. However, although there are many suggestions for optimizing schematic maps so as to maximize these benefits, to date these have not been directly supported by published usability studies or psychological theory. In this paper, we suggest that there are circumstances in which conventional schematic maps fail to yield benefits, and we compare journey planning using the current official RATP Paris Metro map with an all-curves design which replaces straight lines and corners with gentle curves. Three separate usability studies with slightly different methodologies showed that the journey planning time for the all-curves map was better than the RATP version, with effect sizes ranging from 0.48 to 1.12. Subjective usability ratings were derived from questionnaires, and user preferences, but neither were correlated with objective usability measures. We conclude that (1) in terms of designing schematics, there is no evidence to suggest that any rule-set can be claimed to be a gold-standard, and it is important to match the design rules to the properties of the network, (2) in some circumstances, radical departures from traditional ideas can yield usability benefits, and (3) map usability appears to be distinct from map engagement, although the latter is undoubtedly important in encouraging people fully to make use of navigation aides.     

Neural versus traditional approaches to the location of interacting hub facilities

In this paper we consider the optimal location of interacting hub facilities. Using the well-known quadratic integer programming formulation of the uncapacitated, single allocation, p-hub median problem (USApHMP), we demonstrate a mapping onto a Hopfield neural network which guarantees feasibility of the final solution. We also propose a novel modification to the Hopfield network which enables escape from local minima, thus improving final solution quality. A practical application of the USApHMP—a postal delivery network—is used to demonstrate that the quality of these Hopfield network solutions compares favorably to those obtained using both exact methods and simulated annealing. Well-known data sets from the literature are also tested using the Hopfield network approaches, and provide further evidence that optimal or near-optimal solutions can consistently be obtained. The speed advantages which can be attained when implementing neural networks in hardware make the Hopfield neural network a very attractive potential alternative to the existing solution techniques.     

Web-based issue tracking for large software projects

Many problems are found and fixed during the development of a software system. The Project Issue Tracking System toolkit, a Web-based issue-management tool, can be used to organize issue reports during development and to communicate with different project teams around the world. The Project Issue Tracking System (PITS) is a tool that supports the IV&V effort for two major NASA projects: the Earth Observation System Data and Information System (EOSDIS) and the Earth Science Data and Information System (ESDIS). The EOSDIS IV&V effort teams several companies and organizations at several sites with Intermetrics, Inc, serving as the lead contractor. We examine the PITS Web-based mechanisms for tracking issue reports     

一种Web应用软件安全脆弱性测试模型

研究使用错误注入的方法进行web应用软件脆弱性测试的技术,提出环境与状态错误模型(EAS模型),并提出基于EAS模型的web应用软件安全性测试方法.使用EAS模型对来自OWASP的漏洞数据库进行了分类,并与使用EAI模型分类的结果做了对比.使用EAS模型测试了WEB应用软件PEGames,发现了其中的6个漏洞.实验表明,EAS模型具有良好的漏洞覆盖能力和漏洞揭示能力.     

Web-based decision support for regional vegetation management

Native vegetation cover plays a crucial role in conserving biodiversity, sustaining ecosystem functions and processes, and maintaining the productive capacity of land. Sustainable native vegetation management requires awareness among land managers and the wider community of the value and role of remnants of native vegetation, the major issues in their management and best-practice management arrangements. The emergence and widespread use of the World Wide Web presents an opportunity to raise awareness, improve information access, enhance detailed knowledge and build the commitment of land managers and the wider community for sustainable native vegetation management. This paper presents a prototype Web-based information system, VegMan, for regional vegetation management in the Central Highlands region of Queensland, Australia. The system provides access to facts, policies, strategies and decision support tools relevant to vegetation management in the region. The resources and services provided by VegMan and the techniques used for its implementation are described. The potential of a Web-based information system for regional vegetation management and challenges for its development are discussed.     

Web-based energy exploration tool for embedded systems

We describe a Web-based energy estimation tool for embedded systems. An interesting feature of this tool is that it performs real-time cycle-accurate energy measurements on a hardware prototype of the processor. The authors describe the various steps involved in using the tool and present case studies to illustrate its utility.     

Intelligent Web-based education system for adaptive learning

This paper depicts a set of integrated tools to build an intelligent Web-based education system. Our purpose is to create a Web learning environment that can be tailored to the Learners’ needs. The Web learning environment is composed of Authoring Tool, Evaluation System, Interactive Voice System and a Virtual Laboratory for programming in Java. All tools use Web Services and have the characteristics of powerful adaptability for the management, authoring, delivery and monitoring of learning content. Part of the decision-making inside the intelligent Web-based education system was made with a multi-agent system.