【作者】 朱礼伟；

【导师】 王树勋； 姜宏；

【作者基本信息】 吉林大学 ， 通信与信息系统， 2008， 硕士

【摘要】 进入数字化、信息化时代的二十一世纪,人们对教育的需求日益增加。网络教学作为一种新的教学模式,将最大限度利用现有的教育资源,是实现高等教育、职业技术教育的大众化、现代化、终身化和国际化的新型教育形式和必然途径。网络教学系统是网络教学的信息交流平台,为网络教学的发展提供了最大的动力支持。当前的网络教学系统都无法提供对手写输入的支持,如果在网络教学系统中融入微型电子白板,可在网络教学中实现手写输入和动态交互,为网络答疑、网络批交作业提供了便利条件。本文设计实现了支持微型电子白板手写输入功能的网络教学系统,主要包括微型电子白板的手写功能软件、在线作业子系统和网络答疑子系统。主要工作在于:(1)本文对微型电子白板的手写功能软件进行了设计,实现了实时书写和模拟鼠标的功能,并在校准过程中采用了纠偏算法,实现了对信号笔书写笔迹的精确定位。(2)本文搭建了基于B/S架构,支持微型电子白板的在线作业子系统,并完成了在线作业子系统各个功能模块的总体设计和软件实现。由于引入了微型电子白板,本文彻底解决了网络作业系统中手写输入的难题。(3)本文搭建了基于C/S架构,集成网络白板多人手写、音视频通信、演示控制和网上浏览等于一体的支持微型电子白板的网络答疑子系统。网络答疑子系统分成教师端、学生端以及服务器端,本文完成了对各端系统的架构设计和功能实现。更多还原

【Abstract】 The dissertation has completed the partial contents of Jilin Province Science and Technology Development Plan Project "Research on the fundamental tool and application system of informationization teaching".With the development of computer network technology, people’s life, education and the mode of thinking all change along with it. The combination of network and education has raised the revolution in the concept of education. Network teaching, as a new teaching mode, has broken space-time concept, and fully aroused the enthusiasm which the student independently studies, is advantageous to the student individuality development and the innovation ability raise. The network teaching system is the information exchange platform for network teaching, has provided the biggest power support for the network teaching development, therefore the research on network teaching system, more and more receives social attention. Subminiature wireless localization electronic whiteboard is the newest handwriting input equipment. It mainly completes the basic functions of real-time handwriting input, the computer screen handwriting and operating the computer screen. Integrating subminiature electronic whiteboard into the network teaching system realizes network hand-written teaching, which manifests advanced and the convenient teaching mode that greatly improves the teaching quality.The dissertation has designed and realized a network teaching system supporting miniature electronic whiteboard. The dissertation introduces the miniature electronic whiteboard to the design of the network teaching system. And the network teaching system supporting miniature electronic whiteboard is divided into three parts: the miniature electronic whiteboard hand-written function software, and the on-line subsystem and network Q/A subsystem. The main work and contribution as follows:(1) Hand-written software of the miniature electronic whiteboard is designed in the paper. The research on the subminiature electronic whiteboard software used in computer realizes the basic functions that including real-time writing and simulating the mouse. The algorithm correcting an error is used in the process of calibration. which realizes the precise localization on the handwriting written by the signal pen, all that provide the better technical guarantee for the realization of handwriting input function in network teaching system.(2) Design and implementation of online homework subsystem are based on the B/S frame and supporting subminiature electronic whiteboard. It provides the web-based homework environment, and realizes non- paper homework. The system main modules includes: the homework assignment, the homework submission, the homework correction, the homework statistics, the search and inquiry, the homework forum, the excellent homework show, the teacher resources, the management and maintenance, the database design, the interface design jointing CSS and so on. Integrating subminiature electronic whiteboard into the online homework system which solves handwriting input that is universal existent question in network homework system, the computer screen handwriting and correcting handwriting homework online are realized.(3) Design and implementation network Q/A subsystem are based on the C/S frame and supporting subminiature electronic whiteboard. It builds the real-time Q/A interactive platform between the teachers and students, which achieves excellent education resource sharing. The system divides into the server terminal, the teacher terminal and the student terminal, and detailed construction design and the functional design to every terminal system have been completed. The system main module includes: network electronic whiteboard multi- people sharing writing, audio and video communication, show and control, file transfer, internet browsing, database design, interface design using Xtreme Toolkit and so on.The main contents of this paper are as follows:In the first chapter, the dissertation outlines the research background, significance and present situation of the network teaching system supporting miniature electronic whiteboard. And the principal route of the system research is elaborated in detail. Finally, the main research content is proposed.The second chapter has related in detail some technical thought and methods used in the system research.The third chapter introduces the overall frame of the network teaching system supporting miniature electronic whiteboard. And to its three constituents, the miniature electronic whiteboard hand-written function software, the on-line work subsystem and the network Q/A subsystem has separately carried on the overall design.The fourth chapter has carried on the modular analysis to the detailed realization of the miniature electronic whiteboard hand-written function software.The fifth chapter analyzes the implementation in detail of the on-line work subsystem supporting miniature electronic whiteboard, with system running result pictures enclosed to partial modules. Finally related appraisal has been made to the subsystem.The sixth chapter analyzes the implementation in detail of the network Q/A subsystem supporting miniature electronic whiteboard, with the running result pictures to the server port, teacher port and student port. Finally related appraisal has been made to the subsystem.The seventh chapter is the summarization and expectation of this paper.The innovations of this paper are as follows:(1) The research on the the algorithm of calibration of the subminiature electronic whiteboard realizes the precise localization on the handwriting written by the signal pen.(2) At present some teaching systems in the network only support the text input, but does not support the hand-written input. In order to solve this difficult problem, the dissertation integrates subminiature electronic whiteboard into the network teaching system, and realizes handwriting homework and handwriting Q/A in network teaching.(3) The Q/A system in the network generally only includes the teacher terminal and the student terminal, the very big data transmission and the relay pressure are withstood by the teacher terminal, which must affect the teacher’s real-time teaching. The network Q/A system researched by the dissertation was divided into the server terminal, the teacher terminal and the student terminal, a large amount of data was relayed by the the server terminal, which can reduce the data relay pressure, so the transmission speed of the network data can be improved greatly.更多还原