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基于J2EE技术的网络视频教学系统的设计与实现

发布时间:2018-04-02 23:07

  本文选题:网络教学 切入点:网络视频课程 出处:《西北农林科技大学》2017年硕士论文


【摘要】:网络课程教学平台突破了传统课堂教学的时空限制,让学生可以随时随地得到教师的辅导,充分体现了现代教育以教师为主导、以学生为主体的现代教学思想。本文以笔者参与的某校“微课程学院”网络视频教学系统的建设为例,对网络视频教学系统的设计与实现进行研究。“微课程学院”网络视频教学系统采用基于J2EE技术的B/S三层结构进行系统整体架构设计。这种B/S三层结构方案方便了网络视频教学系统的信息共享,提高了网络视频教学系统的可扩展性。通过对网络视频教学系统的实地调研,采用UML中的用例图对网络视频教学系统用例进行分析,确定网络视频教学系统主要包括实现网络课程上传和维护的网络视频课程管理功能模块、为学生提供课程查询和学习等服务的网络视频课程学习模块,以及为系统管理员提供基本系统管理和课程管理的系统管理三大功能模块。在“微课程学院”网络视频教学系统建设中,为了方便学生能快速查询到所需的网络视频课程,系统使用混合协同过滤算法,基于用户的相似性和课程的相似性,结合用户对课程的评价结果,预测学生对于教学课程的偏好,实现课程的自动推荐。在使用协同过滤算法进行课程推荐过程中,针对课程推荐矩阵稀疏、新课程得不到有效推荐和推荐结果适用性不强等问题,通过对用户评价矩阵的分割,将大的用户评价矩阵按列划分为多个子矩阵,来提高推荐算法效率。课程推荐算法的应用,让学生在海量的视频教学资料中,能快速查询到所需的课程,提高了系统的可用性和用户友好度。对网络视频教学系统中课程管理功能、课程学习功能和系统管理功能的测试,以及对系统性能的测试,结果表明:本课题所研究的网络视频教学系统的建设能满足用户通过系统实现随时随地学习,并提升教学效果的需求。
[Abstract]:The network course teaching platform has broken through the time and space limit of the traditional classroom teaching, so that the students can get the teacher's guidance at any time and anywhere, which fully embodies the modern teaching thought that the modern education is dominated by the teacher and the student is the main body.In this paper, the design and implementation of the network video teaching system is studied with the example of the construction of the network video teaching system of a certain school "Microcourse College" in which the author participates.The network video teaching system of "Microcourse College" adopts the three-tier structure of B / S based on J2EE technology to design the whole system architecture.The B / S three-layer scheme facilitates the information sharing of the network video teaching system and improves the expansibility of the network video teaching system.Through the field investigation of the network video teaching system, the use case diagram in UML is used to analyze the use case of the network video teaching system.It is determined that the network video teaching system mainly includes the network video course management module which realizes the network course upload and maintenance, and the network video course learning module which provides the course inquiry and learning services for the students.And provides the system administrator with the basic system management and the curriculum management system management three main function modules.In the construction of network video teaching system of "Microcourse College", in order to facilitate students to quickly query the required network video courses, the system uses hybrid collaborative filtering algorithm, based on the similarity of users and the similarity of courses.Combining with the evaluation result of the course, the author predicts the students' preference for the teaching course and realizes the automatic recommendation of the course.In the course of course recommendation using collaborative filtering algorithm, aiming at the problems of sparse curriculum recommendation matrix, the lack of effective recommendation of the new curriculum and the lack of applicability of the recommendation results, the segmentation of the user evaluation matrix is carried out.In order to improve the efficiency of the recommendation algorithm, the large user evaluation matrix is divided into multiple submatrices by column.The application of the curriculum recommendation algorithm enables students to query the required courses quickly in a large amount of video teaching materials and improves the usability and user friendliness of the system.The function of course management, the function of course learning and the function of system management in the network video teaching system are tested, and the performance of the system is also tested.The results show that the construction of the network video teaching system studied in this paper can meet the needs of users to learn anytime, anywhere and improve the teaching effect.
【学位授予单位】:西北农林科技大学
【学位级别】:硕士
【学位授予年份】:2017
【分类号】:G434;TP311.52

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