A language modeling approach to information retrieval
Proceedings of the 21st annual international ACM SIGIR conference on Research and development in information retrieval
The anatomy of a large-scale hypertextual Web search engine
WWW7 Proceedings of the seventh international conference on World Wide Web 7
A general language model for information retrieval (poster abstract)
Proceedings of the 22nd annual international ACM SIGIR conference on Research and development in information retrieval
Document language models, query models, and risk minimization for information retrieval
Proceedings of the 24th annual international ACM SIGIR conference on Research and development in information retrieval
Modern Information Retrieval
SIGIR '02 Proceedings of the 25th annual international ACM SIGIR conference on Research and development in information retrieval
Cumulated gain-based evaluation of IR techniques
ACM Transactions on Information Systems (TOIS)
The Probability Ranking Principle Revisited
Information Retrieval
CIKM '03 Proceedings of the twelfth international conference on Information and knowledge management
A study of smoothing methods for language models applied to information retrieval
ACM Transactions on Information Systems (TOIS)
Managing versions of web documents in a transaction-time web server
Proceedings of the 13th international conference on World Wide Web
On the temporal dimension of search
Proceedings of the 13th international World Wide Web conference on Alternate track papers & posters
Chronica: a temporal web search engine
ICWE '06 Proceedings of the 6th international conference on Web engineering
A time machine for text search
SIGIR '07 Proceedings of the 30th annual international ACM SIGIR conference on Research and development in information retrieval
Answering general time sensitive queries
Proceedings of the 17th ACM conference on Information and knowledge management
Improving search relevance for implicitly temporal queries
Proceedings of the 32nd international ACM SIGIR conference on Research and development in information retrieval
Use of temporal expressions in web search
ECIR'08 Proceedings of the IR research, 30th European conference on Advances in information retrieval
W2GIS'04 Proceedings of the 4th international conference on Web and Wireless Geographical Information Systems
Exploiting temporal information in Web search
Expert Systems with Applications: An International Journal
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Time plays important roles in Web search, because most Web pages contain time information and a lot of Web queries are time-related. However, traditional search engines have little consideration on the time information in Web pages. In particular, they do not take into account the time information of Web pages when ranking search results. In this paper, we present NTLM, a new time-enhanced language model based ranking algorithm for Web search. First, we present an effective algorithm to extract 〈keyword, content time〉 pairs for Web pages, which associate each keyword in a Web page with an appropriate content time. Then we introduce the new concept of temporal tf, the time-constrained term frequency, for each keyword. After that, we propose a time-enhanced language model to measure the similarity between temporal-textual queries and Web pages on the basis of the combination of textual relevance and temporal relevance. We conduct comparison experiments between NTLM and five competitor algorithms and use two datasets, different types of queries, and two metrics as MRR and NDCG to evaluate the performance. The experimental results show that in the step of extracting 〈keyword, content time〉 pairs, NTLM reaches a high precision of 93.2%, and in the ranking step, NTLM wins the best with respect to MRR and NDCG.