计算机应用与软件
計算機應用與軟件
계산궤응용여연건
COMPUTER APPLICATIONS AND SOFTWARE
2014年
3期
7-10
,共4页
个性化信息检索%本体%TF-IDF%用户兴趣模型
箇性化信息檢索%本體%TF-IDF%用戶興趣模型
개성화신식검색%본체%TF-IDF%용호흥취모형
Personalized information retrieval%Ontology TF-IDF%User interest model
个性化信息检索系统的实时性关键在于如何动态更新用户兴趣模型。针对原有方法的不足，改进用户兴趣模型的描述与更新方式。首先根据网页文档的特征改进 TF-IDF（Term Frequency-Inverse Document Frequency）算法，以此作为用户兴趣特征词的权重，同时通过引入领域本体，将用户兴趣特征项进行语义扩展，并根据用户浏览行为，改进其用户兴趣主题计算方式，并在此基础上提出用户兴趣模型的更新与遗忘机制。实验对比结果表明，该方法能够捕捉用户兴趣的变化，进一步提高个性化信息检索的准确度与用户满意度。
箇性化信息檢索繫統的實時性關鍵在于如何動態更新用戶興趣模型。針對原有方法的不足，改進用戶興趣模型的描述與更新方式。首先根據網頁文檔的特徵改進 TF-IDF（Term Frequency-Inverse Document Frequency）算法，以此作為用戶興趣特徵詞的權重，同時通過引入領域本體，將用戶興趣特徵項進行語義擴展，併根據用戶瀏覽行為，改進其用戶興趣主題計算方式，併在此基礎上提齣用戶興趣模型的更新與遺忘機製。實驗對比結果錶明，該方法能夠捕捉用戶興趣的變化，進一步提高箇性化信息檢索的準確度與用戶滿意度。
개성화신식검색계통적실시성관건재우여하동태경신용호흥취모형。침대원유방법적불족，개진용호흥취모형적묘술여경신방식。수선근거망혈문당적특정개진 TF-IDF（Term Frequency-Inverse Document Frequency）산법，이차작위용호흥취특정사적권중，동시통과인입영역본체，장용호흥취특정항진행어의확전，병근거용호류람행위，개진기용호흥취주제계산방식，병재차기출상제출용호흥취모형적경신여유망궤제。실험대비결과표명，해방법능구포착용호흥취적변화，진일보제고개성화신식검색적준학도여용호만의도。
It is essential for the real-timeliness of personalized information retrieval system how to dynamically update the user interest model.Aiming at the deficiency of the existing method,the paper improves the user interest model description and updating mode.Firstly,ac-cording to the characteristics of the web document,TF-IDF algorithm is improved,whose results are taken as user interest feature words'weight;meanwhile,by introducing domain ontology,the user interest feature items are semantically extended;then,according to user browsing behavior,the user interest theme calculation method is improved,based on which the updating and forgetting mechanism of user interest mod-el is proposed.Results from comparative experiments indicate that the method can capture changes of the user interest and further improve the precision of personalized information retrieval and user satisfaction.
