【摘要】：隨著網(wǎng)絡(luò)技術(shù)的快速發(fā)展以及教育信息化的普及,越來越多的人開始使用網(wǎng)絡(luò)輔助學(xué)習(xí)和工作,網(wǎng)絡(luò)教育已經(jīng)成為我國高等教育信息化的重要組成部分。2010年,北京郵電大學(xué)為了推動高校信息化建設(shè),專門設(shè)立了青年基金項目——基于海量資源的通用教學(xué)平臺的研究與開發(fā),論文作者全程參與了該項目的研究與開發(fā),并重點對網(wǎng)絡(luò)教學(xué)平臺中的站內(nèi)搜索子系統(tǒng)、中文智能搜索引擎等方面展開研究。 網(wǎng)絡(luò)教學(xué)活動的指導(dǎo)思想是以學(xué)習(xí)者為中心的教育理念,旨在通過學(xué)習(xí)者的自主學(xué)習(xí)、協(xié)作學(xué)習(xí)提高自身的學(xué)習(xí)能力。網(wǎng)絡(luò)教學(xué)平臺的出現(xiàn)與使用,為學(xué)習(xí)者和教師提供了可以共享教學(xué)資源的平臺,但是,由于網(wǎng)絡(luò)教學(xué)平臺中的海量教學(xué)資源(課程內(nèi)容、課后習(xí)題、參考資料、教學(xué)課件等)的內(nèi)容和形式具有多樣性等特點,使得教師和學(xué)習(xí)者在教學(xué)活動中快速搜索和應(yīng)用資源變得困難。如何才能最大程度地實現(xiàn)教學(xué)資源共享,使學(xué)習(xí)者能夠從已有的資源上快速精確地找到自己所需要的資源,是教育領(lǐng)域搜索引擎發(fā)展的主要任務(wù),而開發(fā)出一個可以應(yīng)用于網(wǎng)絡(luò)教學(xué)平臺中的資源搜索工具是解決這一問題的核心。 本研究在分析了網(wǎng)絡(luò)教學(xué)平臺的特點以及網(wǎng)絡(luò)教育的特點的基礎(chǔ)上,結(jié)合網(wǎng)絡(luò)學(xué)習(xí)者的學(xué)習(xí)能力評價標(biāo)準(zhǔn),印證了搜索工具在網(wǎng)絡(luò)教學(xué)平臺中的理論價值,在充分分析了搜索引擎的工作原理以及關(guān)鍵技術(shù)的基礎(chǔ)上,設(shè)計了基于開源搜索框架——Lucene的站內(nèi)搜索系統(tǒng)的總體架構(gòu),在該框架中引入信息推送技術(shù)以及智能知識庫技術(shù),提高了搜索引擎的智能化水平,此外,分析并比較了現(xiàn)有搜索引擎的中文分詞器存在的不足之處,提出了中文分詞優(yōu)化方案,并對搜索結(jié)果排序技術(shù)進(jìn)行優(yōu)化,使搜索工具更加適合學(xué)習(xí)者在教學(xué)平臺中對海量資源進(jìn)行搜索和查詢,能夠快速定位用戶所需數(shù)據(jù)的位置,并將符合需求的資源搜索結(jié)果反饋給用戶,進(jìn)一步提高搜索引擎的搜索質(zhì)量。
[Abstract]:With the rapid development of network technology and the popularization of education informatization, more and more people begin to use network to assist learning and work. Network education has become an important part of higher education informatization in our country. In order to promote the information construction of universities, Beijing University of posts and Telecommunications has set up a youth fund project, the research and development of a general teaching platform based on massive resources, and the author of the paper participated in the research and development of the project. And focus on the network teaching platform in the site search subsystem, Chinese intelligent search engine and so on. The guiding ideology of online teaching activities is the learner-centered educational concept, which aims to improve the learning ability of learners through autonomous learning and collaborative learning. The emergence and use of the network teaching platform provides a platform for learners and teachers to share teaching resources. However, due to the massive teaching resources (course content, after-class exercises, reference materials) in the network teaching platform, the network teaching platform provides a platform for learners and teachers to share teaching resources. The diversity of contents and forms makes it difficult for teachers and learners to quickly search and apply resources in teaching activities. How to realize the sharing of teaching resources to the greatest extent, so that learners can quickly and accurately find the resources they need from the existing resources, is the main task of the development of search engine in the field of education. Developing a resource search tool which can be applied to network teaching platform is the core of solving this problem. Based on the analysis of the characteristics of the network teaching platform and the characteristics of the network education, this study confirms the theoretical value of the search tool in the network teaching platform, combining with the evaluation criteria of the learning ability of the network learners. Based on the analysis of the working principle and key technologies of search engine, the paper designs the overall framework of the in-station search system based on open source search frame-Lucene, and introduces information push technology and intelligent knowledge base technology into the framework. The intelligence level of the search engine is improved. In addition, the shortcomings of the Chinese word particifiers in the existing search engines are analyzed and compared, and the optimization scheme of the Chinese word segmentation is put forward, and the ranking technology of the search results is optimized. Make the search tool more suitable for learners to search and query the massive resources in the teaching platform, can quickly locate the location of the data required by the user, and feedback the search results to the user. Further improve the search engine search quality.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TP391.3

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