多约束分级寻优结合预测计算的智能组卷策略

针对智能组卷中多约束制约降低组卷成功率且难以实现知识点自动均匀分布的问题,提出一种多约束分级寻优的策略,通过分级降低问题规模,利用树形结构管理知识点实现知识点均匀分布;针对中小型题库组卷成功率低的问题,在分级寻优中针对章节约束和题型约束提出了一种基于预测计算的无回溯的智能组卷算法,提高组卷成功率。实验测试表明,算法适用于大、中、小型题库,均能得到较理想的组卷结果。     

智能组卷中组卷目标的满足性检查与处理

智能组卷是教育测量标准化、规范化的重要组成部分,但不符合题库条件的组卷目标会导致组卷失败.为此,提出一种组卷目标的满足性检查与处理模型,给出满足性检查的判定准则,对分解目标的满足性检查与调整进行算法设计,并利用Transact-SQL对其实现.实验表明,模型能够提高组卷的效率和成功率.     

基于差分进化算法的智能组卷研究

符合实际组卷需求的组卷问题模型和高效优质的组卷算法是实现计算机自动组卷的关键.针对当前计算机自动组卷模型在重要组卷指标上存在误差的现状,提出了一种能够满足用户精确组卷需求的改进组卷问题模型.将新出现的差分进化算法应用于所提出的模型,给出了一种新型智能组卷算法.利用不同规模的真实题库,进行了算法的模拟实验.实验结果表明,与基本遗传算法相比,该算法在组卷成功率和组卷质量方面具有更好的性能.     

基于目标树的组卷算法的研究

该文首先分析了当前试题库组卷算法中常用的随机、回溯算法,以及出题策略。基于目标树和数据仓库原理提出了一种新的组卷算法。算法通过利用组卷策略,生成满足组卷要求和考试要求的目标树,然后从题库中抽取符合目标树的试题集。由于决策的对象是试题的抽象描述,克服了直接在数据库基础上进行组卷带来的灵活性差、效率低的缺点,具有较大的优越性。     

智能组卷及网上考试系统的研究与应用

通过对现有的网上考试系统及组卷算法的研究,提出新的网上考试系统设计方案。对现有考试系统的数据库进行改进,及对现有的多目标、多约束矩阵组卷模型通过线形转换成单一目标向量规划组卷模型。针对该模型提出一种基于混沌遗传算法的智能组卷技术,并根据该算法及组卷特征,对编码方案做相应的改进。以改进后的数据题库为测试用例,对所提算法的性能进行测试。结果表明,与遗传算法相比,所提的算法在组卷成功率、速度及质量方面均得到改善。     

基于数据库的智能组卷系统开发

研究了试题库管理与智能组卷软件系统的整体框架.利用ADO.NET实现了数据库中试题库的管理功能,开发了题库管理软件系统,实现了高效智能组卷.     

题库自动组卷算法的设计与实现

各种题库管理系统中，试题的自动组卷成功率是一个关键性的问题，本文以试题库的结构设计和随机抽题组卷算法设计为基础，提出了一种提高组卷成功率的新方法。     

在线考试系统题库组卷算法设计

本文详细分析了题库组卷系统中的组卷算法,重点对多约束性离差求解（Multiple Constraint Weighted Deviations problem简称MCWDP）的算法进行研究。简要给出了MCWDP算法表智能组卷系统中的组卷策略。并为简化算法,提高组卷效率提出了相关措施。经测试用MCWDP算法。组卷速度快。能满足用户需求,真正实现了智能组卷。     

《电工学》远程多媒体CAI系统的设计与实现

针对大学《电工学》课程特点,利用ASP.NET等技术和SQLServer开发了一个基于数据库的远程多媒体教学系统。利用分段随机抽选法来实现智能组卷,解决了传统算法在试题库题量大时组卷效率低的问题,并利用SQLManagedProvider连接SQLServer数据库的方式对数据库进行访问,达到了预期的效果。     

基于SQL Server数据库的智能组卷系统开发

研究试题库管理与智能组软件系统的整体框架.利用ADO.NET实现了SQLServer 2000中试题库的管理功能,开发了题库管理软件系统.在遗传算法的基础上,提出一种改进的智能组卷方法,有利于提高进化速度,避免陷入局部最优.实例分析表明,改进的遗传算法具有较好的智能组卷性能,实现了高效智能组卷.     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

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.     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.