文字书写自动教学教室系统

发布时间：2018-04-28 13:38

本文选题：文字书写教学 + 教室系统　；参考：《湘潭大学》2014年硕士论文

【摘要】：现有教室系统大都是虚拟教室系统、协作教学系统和多媒体教室系统，对文字书写教学没有实现很好的支持。针对这一现象，研发了一个结合国民义务教育的文字书写自动教学教室系统。该系统文字书写教学终端为本实验室研制的文字书写教学装置，其核心功能是多文种、多格式兼容文字书写教学，与联网相关的功能包括接受老师统一布置作业、作业保存或提交，在线提问等；教师服务器具有作业布置、批改评阅、在线答疑等功能。文字书写教学终端与教师端服务器相互协作，构成文字书写教学教室系统。文字书写教学教室系统的研究涉及文字书写结果存储，教师端设计、系统网络通信等关键技术。本文主要研究研究教室系统的功能实现、教室系统的嵌入式网络协议设计和实现。在系统功能实现中，，分别针对学生端和教师端进行设计。文字书写教学教室系统网络协议是以以太网为基础，根据教室系统的通信特点和要求，设计的与以文字书写教学装置为终端的文字书写教学教室系统相适用的嵌入式局域网协议。本文的创新内容如下：一、设计了用于文字书写自动教学的教室系统解决方案。采用GUI设计了系统的交互界面，实现了作业矢量保存的方法，该方法大大减少了作业数据的存储量，适应了系统内部嵌入式设备存储容量受限的状况。二、提出了一种适合该类教室系统的嵌入式局域网协议，即CSELP。数据帧在以太帧的基础上扩展8个字节实现确认、超时重传、流量控制等功能来提供面向连接的可靠传输服务，简化了数据处理和状态机制。提出改进的带宽预估方法解决拥塞控制的问题，在拥塞避免阶段根据预测的窗口大小变化调整拥塞窗口；采用新设计的重传队列实现面向组的确认机制，从而提高了系统的实时性和传输效率。三、基于CSELP协议实现了该教室系统的网络通信。设计了教室系统学生客户端和教师端服务器的网络通信模型，实现了教室系统的网络通信相关功能模块，如作业布置、作业提交、在线交流等。实验结果表明，CSELP协议为本教室系统提供了充分的网络通信保障。教室系统相关功能模块能对文字书写进行实时机器智能辅导和教师在线人工辅导，达到真正的书写教学目的。
[Abstract]:The existing classroom systems are mostly virtual classroom systems, collaborative teaching systems and multimedia classroom systems. Aiming at this phenomenon, an automatic teaching classroom system of writing combining with compulsory education is developed. The writing teaching terminal of this system is a writing teaching device developed by our laboratory. Its core function is multilingual, multi-format compatible writing teaching, and the related functions related to the network include accepting teachers' unified assignment. Job saving or submission, online questioning, etc. The teacher server has the functions of assignment arrangement, correction and comment, online answering and so on. The writing teaching terminal and the teacher end server cooperate with each other to form the writing teaching classroom system. The research of writing teaching classroom system involves the key technologies such as writing result storage, teacher end design, system network communication and so on. This paper mainly studies the function realization of classroom system, the embedded network protocol design and implementation of classroom system. In the realization of system function, the students and teachers are designed respectively. The network protocol of writing teaching classroom system is based on Ethernet, according to the communication characteristics and requirements of classroom system, The designed embedded LAN protocol is applicable to the writing teaching classroom system with the writing teaching device as the terminal. The innovations of this paper are as follows: First, the classroom system solution for automatic teaching of writing is designed. The interactive interface of the system is designed by using GUI, and the method of job vector preservation is realized. The method greatly reduces the storage capacity of the job data and adapts to the limited storage capacity of embedded devices in the system. Secondly, an embedded LAN protocol, CSELPfor this kind of classroom system, is proposed. Based on the Ethernet frame, the data frame extends 8 bytes to implement the functions of confirmation, timeout retransmission, flow control and so on to provide reliable transmission service for connection, which simplifies the data processing and state mechanism. An improved bandwidth estimation method is proposed to solve the congestion control problem. The congestion window is adjusted according to the predicted window size in the phase of congestion avoidance, and the new retransmission queue is used to implement the group-oriented confirmation mechanism. Thus, the real-time and transmission efficiency of the system are improved. Thirdly, the network communication of the classroom system is realized based on CSELP protocol. The network communication model of student client and teacher server in classroom system is designed, and the related function modules of classroom system are realized, such as assignment arrangement, assignment submission, online communication and so on. The experimental results show that CSELP protocol provides sufficient network communication guarantee for the classroom system. The classroom system related function module can carry on the real time machine intelligence tutoring and the teacher on-line manual tutoring to the character writing, achieves the real writing teaching goal.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.1;G434

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