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Improving two-stage ad-hoc retrieval for short queries

K. L. Kwok, M. Chan
1998 Proceedings of the 21st annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '98  
Short queries in an ad-hoc retrieval environment are difftcult but unavoidable.  ...  Experiments were performed using the TREC 5 and 6 environment. It is found that together these methods perform well for the difftcult TRECS topics, and also works for the TREC-6 very short topics.  ...  Dinstl who contributed in extending the PIRCS system for this project.  ... 
doi:10.1145/290941.291003 dblp:conf/sigir/KwokC98 fatcat:hpkqnt4adfdunmpoxsjreifyoy

Improving English and Chinese ad-hoc retrieval

Kui-Lam Kwok
1996 Proceedings of a workshop on held at Baltimore, Maryland October 13-15, 1998 -  
We investigated both English and Chinese ad-hoc information retrieval (IR).  ...  For short queries, we studied five term level techniques that together lead to improvements over standard ad-hoc 2-stage retrieval some 20% to 40% for TREC5 & 6 experiments.  ...  Experiments with our PIRCS system have shown that this 2-stage of ad-hoc method works more often than not, about 2 out 3 times (35 queries in TREC-5 and 32 in TREC-6 out of 50 queries each), and the average  ... 
doi:10.3115/1119089.1119113 dblp:conf/tipster/Kwok98 fatcat:if2hd7jfajejnnn4vyod7z76ea

Overview of the first TREC conference

Donna Harman
1993 Proceedings of the 16th annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '93  
The first Text REtrieval Conference (TREC-1) was held in early November 1992 and was attended by about 100 people working in the 25 participating groups.  ...  There was a large variety of retieval techniques reported oz including methods using automatic thesattrii, sophisticated term weighting, natural language techniques, relevance feedback and advanced pattern  ...  Two types of retrieval are being examined --retrieval using an "ad-hoc" query such as a researcher might use in a library environment, and retrieval using a "routing" query such as a profile to filter  ... 
doi:10.1145/160688.160692 dblp:conf/sigir/Harman93 fatcat:urwm3q3wgra6nnvo22nkrpaq3i

Comparing representations in Chinese information retrieval

K. L. Kwok
1997 Proceedings of the 20th annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '97  
The retrieval collection is the approximately 170 MB TREC-5 Chinese corpus of news articles, and 28 queries that are long and rich in wordings.  ...  Three representation methods are empirically investigated for Chinese information retrieval: 1-gram (single character), bigram (two contiguous overlapping characters), and short-word indexing based on  ...  'rules' -common ad-hoc language usage rules, also manually determined, are then employed to further split the chunks into short words of 2 or 3 characters.  ... 
doi:10.1145/258525.258531 dblp:conf/sigir/Kwok97 fatcat:g44yl7qpz5hphjpwalrnthquxm

Comparing representations in Chinese information retrieval

K. L. Kwok
1997 SIGIR Forum  
The retrieval collection is the approximately 170 MB TREC-5 Chinese corpus of news articles, and 28 queries that are long and rich in wordings.  ...  Three representation methods are empirically investigated for Chinese information retrieval: 1-gram (single character), bigram (two contiguous overlapping characters), and short-word indexing based on  ...  'rules' -common ad-hoc language usage rules, also manually determined, are then employed to further split the chunks into short words of 2 or 3 characters.  ... 
doi:10.1145/278459.258531 fatcat:nn4ykcejbnbnxcl42mqubwqzfu