【作者】 王靖；

【导师】 胡宁静；

【作者基本信息】 长沙理工大学 ， 计算机应用技术， 2005， 硕士

【摘要】 随着计算机技术的发展和计算机网络的逐步完善,远程教育作为一种新型的教学模式对满足信息社会终身教育、全民教育、个性化教育以及社会化教育的需求,加速我国的教育事业的发展具有特殊的意义。但目前的远程教学资源可共享性差,教学系统缺乏智能性。本文在纵观目前国内外教育资源的标准化研究现状的同时,深入研究美国ADL 组织的SCORM 模型,针对SCORM 模型的不足,研究了远程教学的课件资源标准化问题,即课件资源的重复利用和共享,以及在此基础上的智能教学问题。首先,论文构造了基于知识体系的知识点模型和学生模型。以这两个模型为基础,采用XML技术,建立了可共享知识点的教学内容包装STCO模型。在STCO模型中重点研究了学习资源层次、元数据及运行时的API 三个关键问题。STCO模型满足在不同教学系统之间交流教学课件的要求,以及学生选择个性化教学材料的要求,为智能教学系统的建立奠定基础。进一步,深入研究了智能教学系统的智能导航问题。首先,根据知识点模型的定义,构造了知识点图中的智能导航算法;并采用学生知识结构的语义相似度计算方法,用于基于案例的推理,以利用以往的教学经验指导学生学习。其次,运用模糊多目标决策,提出了基于代理和Web 服务的学生教学材料选择方法,并使用Web 服务技术实现教学资源在Internet上共享复用的目的,同时达到对学生进行个性化教学的需求。最后,在本论文所研究的理论与方法的基础上,设计了智能教学的原型系统,指明系统开发与运行平台的软硬件环境,确定系统目标,设计了原型系统的系统结构,划分了功能模块,对智能教学的关键部分使用UML语言进行建模,构造了系统的用例和对象模型,并实现了其中部分功能。原型系统表明本论文的研究成果在现有技术条件下的可实现性。更多还原

【Abstract】 With the rapid development of computer technology and the gradual improvement of computer network, distance education as a new-style teaching pattern plays an important role in modern education, for it accelerates the development of our countrywide education and meets the need of the durative, the widespread, the individuation and the socialization of education. But current distance education resources can’t be totally shared and the teaching system is short of intellectualization. The American ADL organization’s SCORM model was deeply studied after the present status of standardization of education resources at home and abroad was surveyed. Aiming at the shortcoming of SCORM model this thesis made a study of the distance education courseware’s standardization problems, namely, the repeated utilization and sharing of the courseware resources and the problems based on this such as the intellectualization of tutoring. First, the knowledge model and the student model based on knowledge system are put forward in the thesis. On the basis of the two models, the STCO model, which includes the learning contents that can be shared, is set up, in which the XML technology is used. Three key problems about the STCO model are mainly studied, learning resource level, metadata and the runtime API. The STCO model meets the need of exchanging courseware between different teaching systems and the need of students selecting individualized learning materials, which lays a foundation for the intellectualized teaching system. Furthermore, this paper has done in-depth research in intelligent navigation of the intelligent tutoring system. First, the intelligent navigation algorithms of the topic graph has been formatted based on the definition of the topic model, and the semantic similarity algorithms for the students knowledge structure has been put forward to case-based reasoning the and give students some instruction based on previous teaching experience. Second, fuzzy multiple objects decision theory has been applied to produce the method to select the student learning resources based on the agent and web services. The learning resource could be shared on the internet through the web services technology, and the individualization teaching purpose could be achieved at the same time. At last, based on the theories and methods this paper has produced, the prototype of intelligent tutoring system has been developed. The software and hardware environment of the system development and the run deck has been pointed out and the system object has been fixed. The system structure of the prototype system has been designed and divided into several function modules. As to the most important part of the intelligent tutoring system, the model is setup in UML language. The use cases and object models of the system are constructed and some of the function has been realized. The prototype system demonstrates that the research result of this paper could be achieved under current technology condition.更多还原