【作者】 张坤；

【导师】 肖秋霞；

【作者基本信息】 大连海事大学 ， 计算机应用技术， 2005， 硕士

【摘要】 本文引入了XML,SOAP,AGP.NET等相关技术,建立了一个新的基于Web Services的个性化学习系统,其中包括在线考试,在线练习,在线答疑等功能。整个系统自底向上依次为数据层,服务层,表现层。数据层由XML文件和SQL Server 2000数据库组成,XML数据存储的通用性保证了试题数据的反复可重用,对于多用户的并发访问,SQL Server 2000数据库具有较好的性能和便利性。服务层用WebServices来实现,Web Services作为下一代分布式系统的核心,具有极广阔的用途和前景,而且具有如下优势:互操作性,普遍性,易于使用和行业支持,因此保证了整个系统的模块化和充分扩展性。表现层中XML实现了形式与内容分离,XML文档用于描述数据及其相互之间的关系,XSL和CSS用于表现其内容,使同一内容可以根据实际要求呈现多种表现形式,从而解决了内容结构不合理、呈现方式不够丰富所带来的不便。 个性化服务处理引擎采用快速算法收集用户个性信息,将个性化数字服务的概念运用在远程教育中,是解决学生需求的个性化和教学资源的单一化这一矛盾的有效方案。实现了个性化后的远程学习将是一种自主的带反馈机制的学习,它使学生能够更多更高效地获取所需要的教育信息资源,提高了学生的学习兴趣。采用自适应遗传算法抽取试题,优化搜索过程,具有较好的性能和实用性。自适应练习算法应用IRT理论中单参数LOGISTIC模型,可以有效评估学生的水平。基于XML的智能答疑系统利用知识库进行推理,是一个智能适应性的知识库系统,它是人工智能、信息检索和自然语言处理等技术的结合,具有智能性、开放性等优点。该网上学习系统的研制为网络教学这种新型教学模式和素质教育的实施起了积极的推动作用。更多还原

【Abstract】 The paper imported techniques like XML, SOAP, ASP.NET and etc, built and implemented a new personalized learning system based on Web Services and with the functions of web examining, web training and web answering. All system is divided into data-layer, service-layer and show-layer from bottom to top. Data-layer is composed of XML file and SQL Server 2000 database, the general acceptance of XML data storing ensured the reuse of test questions, SQL Server 2000 database has a good performance in collateral accessing of multi-user. Service-layer is implemented with Web Services, which is the center of next distributing system and has a quite wide use and foreground, in addition, Web Services ensured the modularization and sufficient expansibility of all system with the advantages of mutual operation, universality, easy using and industry sustaining. XML realized the separation between form and representation in show-layer, XML document is used to describe data and the relationships of data, XSL and CSS are used in representing the content of data, hence the same content can be showed with multiform representation according to actual requirement, this is also a solution to illogicality of the content structure and inconvenience brought by the indigence of representing mode.Individuation service engine collected personal information of users with an effective algorithm, the concept of Individuation service is applied in remote education, it is a effective solution to the contradiction between Individuation of students’ requirement and simplification of learning resources. Having implemented individuation, Remote study will be a independent study with feedback mechanism, it enables the students to acquire teaching resources what they needed and improve interests of their study. Adaptive genetic algorithm is applied to extracting examinations, and has better performance and practicability. Adaptive training algorithm applying LOGISTIC model of single parameter can effectively evaluate the level of student. Intelligent question answering system based on XML reasoned using repository, it is a combinative technique of AI, information searches and disposal of nature language and so on, it has many advantages such as intelligence, opening and etc. The design of network learning system promotes the implement of diathesis education and a new mode of network teaching.更多还原