CAJ | 학술논문

如何利用时间信息改善 Web 搜索效果是近年来的一个研究热点，这是因为大多数的 Web 网页都包含有时间信息，同时许多 Web 查询也含有时间查询词。文中围绕时间感知的 Web 搜索需求，重点研究了两个方面的问题，即查询时间词扩展和时间感知的搜索结果排序，提出了基于查询词和时间词共现关系的查询时间词扩展算法，以及结合了文本相关度和时间相关度的时间感知排序算法。作者建立了一个时间感知的 Web 搜索原型系统，并在大规模真实数据集上进行了实验。实验结果表明作者提出的算法在搜索效果上有明显的改善，并且具有较好的时间性能。
여하이용시간신식개선 Web 수색효과시근년래적일개연구열점，저시인위대다수적 Web 망혈도포함유시간신식，동시허다 Web 사순야함유시간사순사。문중위요시간감지적 Web 수색수구，중점연구료량개방면적문제，즉사순시간사확전화시간감지적수색결과배서，제출료기우사순사화시간사공현관계적사순시간사확전산법，이급결합료문본상관도화시간상관도적시간감지배서산법。작자건립료일개시간감지적 Web 수색원형계통，병재대규모진실수거집상진행료실험。실험결과표명작자제출적산법재수색효과상유명현적개선，병차구유교호적시간성능。
Utilizing time information to improve the effective of Web search has been a research focus in recent years,because most Web pages contain time information and many Web queries involve time-related query terms.Motivated by the needs of time-aware Web search,in this paper,we concentrate on two key issues,namely temporal keyword expansion and time-aware ranking.Particularly,we propose a new algorithm for temporal word expansion which is based on the co-occurrence of query terms and time words.In addition,we present a new time-aware ranking algorithm considering both textual relevance and time relevance.We build a prototype system and conduct experiments on real data sets to evaluate the performance of our proposal. The results show that the proposed algorithms are time efficient and have a substantial improve-ment on the effective of Web search.