本文選題：文字書寫教學(xué) + 教室系統(tǒng)��； 參考：《湘潭大學(xué)》2014年碩士論文

【摘要】：現(xiàn)有教室系統(tǒng)大都是虛擬教室系統(tǒng)、協(xié)作教學(xué)系統(tǒng)和多媒體教室系統(tǒng)，對(duì)文字書寫教學(xué)沒有實(shí)現(xiàn)很好的支持。針對(duì)這一現(xiàn)象，研發(fā)了一個(gè)結(jié)合國(guó)民義務(wù)教育的文字書寫自動(dòng)教學(xué)教室系統(tǒng)。該系統(tǒng)文字書寫教學(xué)終端為本實(shí)驗(yàn)室研制的文字書寫教學(xué)裝置，其核心功能是多文種、多格式兼容文字書寫教學(xué)，與聯(lián)網(wǎng)相關(guān)的功能包括接受老師統(tǒng)一布置作業(yè)、作業(yè)保存或提交，在線提問等；教師服務(wù)器具有作業(yè)布置、批改評(píng)閱、在線答疑等功能。文字書寫教學(xué)終端與教師端服務(wù)器相互協(xié)作，構(gòu)成文字書寫教學(xué)教室系統(tǒng)。 文字書寫教學(xué)教室系統(tǒng)的研究涉及文字書寫結(jié)果存儲(chǔ)，教師端設(shè)計(jì)、系統(tǒng)網(wǎng)絡(luò)通信等關(guān)鍵技術(shù)。本文主要研究研究教室系統(tǒng)的功能實(shí)現(xiàn)、教室系統(tǒng)的嵌入式網(wǎng)絡(luò)協(xié)議設(shè)計(jì)和實(shí)現(xiàn)。在系統(tǒng)功能實(shí)現(xiàn)中，，分別針對(duì)學(xué)生端和教師端進(jìn)行設(shè)計(jì)。文字書寫教學(xué)教室系統(tǒng)網(wǎng)絡(luò)協(xié)議是以以太網(wǎng)為基礎(chǔ)，根據(jù)教室系統(tǒng)的通信特點(diǎn)和要求，設(shè)計(jì)的與以文字書寫教學(xué)裝置為終端的文字書寫教學(xué)教室系統(tǒng)相適用的嵌入式局域網(wǎng)協(xié)議。 本文的創(chuàng)新內(nèi)容如下： 一、設(shè)計(jì)了用于文字書寫自動(dòng)教學(xué)的教室系統(tǒng)解決方案。采用GUI設(shè)計(jì)了系統(tǒng)的交互界面，實(shí)現(xiàn)了作業(yè)矢量保存的方法，該方法大大減少了作業(yè)數(shù)據(jù)的存儲(chǔ)量，適應(yīng)了系統(tǒng)內(nèi)部嵌入式設(shè)備存儲(chǔ)容量受限的狀況。 二、提出了一種適合該類教室系統(tǒng)的嵌入式局域網(wǎng)協(xié)議，即CSELP。數(shù)據(jù)幀在以太幀的基礎(chǔ)上擴(kuò)展8個(gè)字節(jié)實(shí)現(xiàn)確認(rèn)、超時(shí)重傳、流量控制等功能來提供面向連接的可靠傳輸服務(wù)，簡(jiǎn)化了數(shù)據(jù)處理和狀態(tài)機(jī)制。提出改進(jìn)的帶寬預(yù)估方法解決擁塞控制的問題，在擁塞避免階段根據(jù)預(yù)測(cè)的窗口大小變化調(diào)整擁塞窗口；采用新設(shè)計(jì)的重傳隊(duì)列實(shí)現(xiàn)面向組的確認(rèn)機(jī)制，從而提高了系統(tǒng)的實(shí)時(shí)性和傳輸效率。 三、基于CSELP協(xié)議實(shí)現(xiàn)了該教室系統(tǒng)的網(wǎng)絡(luò)通信。設(shè)計(jì)了教室系統(tǒng)學(xué)生客戶端和教師端服務(wù)器的網(wǎng)絡(luò)通信模型，實(shí)現(xiàn)了教室系統(tǒng)的網(wǎng)絡(luò)通信相關(guān)功能模塊，如作業(yè)布置、作業(yè)提交、在線交流等。 實(shí)驗(yàn)結(jié)果表明，CSELP協(xié)議為本教室系統(tǒng)提供了充分的網(wǎng)絡(luò)通信保障。教室系統(tǒng)相關(guān)功能模塊能對(duì)文字書寫進(jìn)行實(shí)時(shí)機(jī)器智能輔導(dǎo)和教師在線人工輔導(dǎo)，達(dá)到真正的書寫教學(xué)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.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP393.1;G434

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