Results 1 - 10 of 2,014

Retrieving Collocations from Text: Xtract

by Frank Smadja - Computational Linguistics , 1993
"... Natural languages are full of collocations, recurrent combinations of words that co-occur more often than expected by chance and that correspond to arbitrary word usages. Recent work in lexicography indicates that collocations are pervasive in English; apparently, they are common in all types of wri ..."
Abstract - Cited by 353 (1 self) - Add to MetaCart
-precision output. These techniques have been implemented and resulted in a lexicographic tool, Xtract. The techniques are described and some results are presented on a 10 million-word corpus of stock market news reports. A lexicographic evaluation of Xtract as a collocation retrieval tool has been made

Content-based multimedia information retrieval: State of the art and challenges

by Michael S. Lew - ACM Trans. Multimedia Comput. Commun. Appl , 2006
"... Extending beyond the boundaries of science, art, and culture, content-based multimedia information retrieval provides new paradigms and methods for searching through the myriad variety of media all over the world. This survey reviews 100+ recent articles on content-based multimedia information retri ..."
Abstract - Cited by 311 (12 self) - Add to MetaCart
retrieval and discusses their role in current research directions which include browsing and search paradigms, user studies, affective computing, learning, semantic queries, new features and media types, high performance indexing, and evaluation techniques. Based on the current state of the art, we discuss

WebMate: A Personal Agent for Browsing and Searching

by Liren Chen, Katia Sycara - In Proceedings of the Second International Conference on Autonomous Agents , 1998
"... The World-Wide Web is developing very fast. Currently, finding useful information on the Web is a time consuming process. In this paper, we present WebMate, an agent that helps users to effectively browse and search the Web. WebMate extends the state of the art in Web-based information retrieval in ..."
Abstract - Cited by 239 (10 self) - Add to MetaCart
The World-Wide Web is developing very fast. Currently, finding useful information on the Web is a time consuming process. In this paper, we present WebMate, an agent that helps users to effectively browse and search the Web. WebMate extends the state of the art in Web-based information retrieval

Scaling Question Answering to the Web

by Cody C. T. Kwok, Oren Etzioni, Daniel S. Weld , 2001
"... The wealth of information on the web makes it an attractive resource for seeking quick answers to simple, factual questions such as "who was the first American in space?" or "what is the second tallest mountain in the world?" Yet today's most advanced web search services (e. ..."
Abstract - Cited by 238 (16 self) - Add to MetaCart
.g., Google and AskJeeves) make it surprisingly tedious to locate answers to such questions. In this paper, we extend question-answering techniques, first studied in the information retrieval literature, to the web and experimentally evaluate their performance. First we introduce MULDER, which we believe

Stemming Algorithms - A Case Study for Detailed Evaluation

by David A. Hull - Journal of the American Society for Information Science , 1996
"... The majority of information retrieval experiments are evaluated by measures such as average precision and average recall. Fundamental decisions about the superiority of one retrieval technique over another are made solely on the basis of these measures. We claim that average performance figures n ..."
Abstract - Cited by 182 (4 self) - Add to MetaCart
The majority of information retrieval experiments are evaluated by measures such as average precision and average recall. Fundamental decisions about the superiority of one retrieval technique over another are made solely on the basis of these measures. We claim that average performance figures

How Reliable are the Results of Large-Scale Information Retrieval Experiments?

by Justin Zobel - Proceedings of the 21st Annual International ACM SIGIR Conference on Research and Development in Information Retrieval , 1998
"... Two stages in measurement of techniques for information retrieval are gathering of documents for relevance assessment and use of the assessments to numerically evaluate e#ectiveness. We consider both of these stages in the context of the TREC experiments, to determine whether they lead to measuremen ..."
Abstract - Cited by 156 (4 self) - Add to MetaCart
Two stages in measurement of techniques for information retrieval are gathering of documents for relevance assessment and use of the assessments to numerically evaluate e#ectiveness. We consider both of these stages in the context of the TREC experiments, to determine whether they lead

Letor: Benchmark dataset for research on learning to rank for information retrieval

by Tie-yan Liu, Jun Xu, Tao Qin, Wenying Xiong, Hang Li - In Proceedings of SIGIR 2007 Workshop on Learning to Rank for Information Retrieval , 2007
"... This paper is concerned with learning to rank for information retrieval (IR). Ranking is the central problem for information retrieval, and employing machine learning techniques to learn the ranking function is viewed as a promising approach to IR. Unfortunately, there was no benchmark dataset that ..."
Abstract - Cited by 156 (16 self) - Add to MetaCart
This paper is concerned with learning to rank for information retrieval (IR). Ranking is the central problem for information retrieval, and employing machine learning techniques to learn the ranking function is viewed as a promising approach to IR. Unfortunately, there was no benchmark dataset

A Study on Retrospective and On-Line Event Detection

by Yiming Yang, Tom Pierce, Jaime Carbonell , 1998
"... This paper investigates the use and extension of text retrieval and clustering techniques for event detection. The task is to automatically detect novel events from a temporally-ordered stream of news stories, either retrospectively or as the stories arrive. We applied hierarchical and non-hierarchi ..."
Abstract - Cited by 193 (9 self) - Add to MetaCart
-driven retrieval. We also found that temporal distribution patterns of document clusters provide useful information for improvement in both retrospective detection and on-line detection of novel events. In an evaluation using manually labelled events to judge the system-detected events, we obtained a result of 82

COMBINING APPROACHES TO INFORMATION RETRIEVAL

by W. Bruce Croft
"... The combination of different text representations and search strategies has become a standard technique for improving the effectiveness of information retrieval. Combination, for example, has been studied extensively in the TREC evaluations and is the basis of the “meta-search” engines used on the W ..."
Abstract - Cited by 114 (3 self) - Add to MetaCart
The combination of different text representations and search strategies has become a standard technique for improving the effectiveness of information retrieval. Combination, for example, has been studied extensively in the TREC evaluations and is the basis of the “meta-search” engines used

An Evaluation of Diversification Techniques

by Duong Chi Thang, Nguyen Thanh Tam, Nguyen Quoc, Karl Aberer
"... Abstract. Diversification is a method of improving user satisfaction by increasing the variety of information shown to user. Due to the lack of a precise definition of information variety, many diversification techniques have been proposed. These techniques, however, have been rarely com-pared and a ..."
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Abstract. Diversification is a method of improving user satisfaction by increasing the variety of information shown to user. Due to the lack of a precise definition of information variety, many diversification techniques have been proposed. These techniques, however, have been rarely com
Results 1 - 10 of 2,014