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DCU@TRECMed 2012: Using adhoc Baselines for Domain-Specific Retrieval
2012
Text Retrieval Conference
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We submitted four runs based on the BM25 retrieval model to TRECMed 2012 using standard BM25, standard query expansion, result filtering, and concept-based query expansion. ...
However, results on the 2011 data proved otherwise: query expansion decreased performance, and filtering and reranking by term proximity also decreased performance slightly. ...
Acknowledgment This research is supported by the Science Foundation Ireland (Grant 07/CE/I1142) as part of the Centre for Next Generation Localisation (CNGL) project at DCU and by funding from the European ...
dblp:conf/trec/LevelingGKJ12
fatcat:3pewtjzrc5d37gvspujk4zcy7e
Passage retrieval for incorporating global evidence in sequence labeling
2011
Proceedings of the 20th ACM international conference on Information and knowledge management - CIKM '11
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Utilizing all the tokens in a sentence for query context consistently perform best on both intrinsic and extrinsic evaluations. ...
Many forms of linguistic analysis, such as part of speech tagging, named entity recognition, and other sequence labeling tasks are performed on short spans of text and assume statistical dependence within ...
For sequences with strong evidence feature expansion is unnecessary. ...
doi:10.1145/2063576.2063633
dblp:conf/cikm/DaltonAS11
fatcat:wjmxnrbhtndt5ao75ahcefch6e
Elicitation and use of relevance feedback information
2006
Information Processing & Management
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The TREC results show that one of the methods is an effective means of interactive query expansion and yields significant performance improvements. ...
Both methods then expand the query based on the user feedback. ...
The effect of relevant and non-relevant documents on query expansion following user feedback Query expansion based on relevance feedback is typically more effective than based on blind feedback, however ...
doi:10.1016/j.ipm.2004.10.006
fatcat:vwzaw4chgfgoxosmjh4owczzdu
The impact of query structure and query expansion on retrieval performance
1998
Proceedings of the 21st annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '98
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The effects of query structures and query expansion (QE) on retrieval performance were tested with a best match retrieval system (INQUERY 1 ). ...
With weak structures and Boolean structured queries, QE was not very effective. The best performance was achieved with one of the strong structures at the largest expansion level. ...
This study was funded by Emil Aaltosen Säätiö, Pirkanmaan Kulttuurirahasto, and National Multimedia Project, KaMu-Tila. ...
doi:10.1145/290941.290978
dblp:conf/sigir/KekalainenJ98
fatcat:mlw7db4wbfb3nbmlhsl4vsvdg4
Document text characteristics affect the ranking of the most relevant documents by expanded structured queries
2001
Journal of Documentation
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A query expansion experiment verified that the findings of the text analysis can be exploited in formulating more effective queries for best match retrieval in the hunt for highly relevant documents. ...
The results of the document analysis were applied in an experiment on query expansion (QE) in a probabilistic IR system. ...
We are grateful for the FIRE research group for the helpful comments and collaboration. The study was funded in part by the Academy of Finland, Research project 44704. ...
doi:10.1108/eum0000000007087
fatcat:drprhfmdkbfbpku4ohjjqkbb2q
Noun phrases in interactive query expansion and document ranking
2006
Information retrieval (Boston)
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A combined syntactico-statistical method was used for the selection of phrases for query expansion. Several statistical measures of phrase selection were evaluated. ...
The paper presents several techniques for selecting noun phrases for interactive query expansion following pseudo-relevance feedback and a new phrase-based document ranking method. ...
Most of the leading statistical IR models, such as probabilistic (Robertson and Spärck Jones, 1976 ) and vector-space (Salton et al., 1975) rely on the use of single terms and are based on strong term ...
doi:10.1007/s10791-006-6390-8
fatcat:pllm63nqhjfipmlu2yrcdi5bpe
The Role of Multi-word Units in Interactive Information Retrieval
[chapter]
2005
Lecture Notes in Computer Science
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First, noun phrases were selected using a part-ofspeech tagger and a noun-phrase chunker, and secondly, different statistical measures were applied to select phrases for query expansion. ...
The paper presents several techniques for selecting noun phrases for interactive query expansion following pseudo-relevance feedback and a new phrase search method. ...
For example, one of the relevant documents retrieved for the topic 429 was demoted from rank 53 to 349 because it matched predominantly one term per query phrase. ...
doi:10.1007/978-3-540-31865-1_29
fatcat:cbuihcp6hbe53awu3w4xrvzxd4
Query Expansion based on Pseudo Relevance Feedback from Definition Clusters
2010
International Conference on Computational Linguistics
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We show that this expansion method outperforms both local feedback, based on the document collection, and expansion with WordNet synonyms, for the task of document retrieval in Question Answering. ...
Query expansion consists in extending user queries with related terms in order to solve the lexical gap problem in Information Retrieval and Question Answering. ...
answer). • medium questions, which have no strong match answer, but at least an answer with a weak match (one query term in the answer). • hard questions, which have neither a strong nor a weak match ...
dblp:conf/coling/Bernhard10
fatcat:bgrhaty3mfdwvje5uywxb5sel4
Resolving query translation ambiguity using a decaying co-occurrence model and syntactic dependence relations
2002
Proceedings of the 25th annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '02
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Bilingual dictionaries have been commonly used for query translation in cross-language information retrieval (CLIR). However, we are faced with the problem of translation selection. ...
Our evaluation on translation accuracy shows that translating triples as units is more precise than a word-by-word translation. ...
ACKNOWLEDGEMENTS The authors would like to thank Ashley Chang, and Chang-Ning Huang for their suggestions and comments on a preliminary draft of this paper. ...
doi:10.1145/564376.564409
dblp:conf/sigir/GaoZNHC02
fatcat:d7zcc5xnzvaxpbj6g26mckuzce
Resolving query translation ambiguity using a decaying co-occurrence model and syntactic dependence relations
2002
Proceedings of the 25th annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '02
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Bilingual dictionaries have been commonly used for query translation in cross-language information retrieval (CLIR). However, we are faced with the problem of translation selection. ...
Our evaluation on translation accuracy shows that translating triples as units is more precise than a word-by-word translation. ...
ACKNOWLEDGEMENTS The authors would like to thank Ashley Chang, and Chang-Ning Huang for their suggestions and comments on a preliminary draft of this paper. ...
doi:10.1145/564405.564409
fatcat:idsyfptpa5fr3dwutm6wpibliu
FUB, IASI-CNR and University of Tor Vergata at TREC 2007 Blog Track
2007
Text Retrieval Conference
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We present a fully automatic and weighted dictionary to be used in topical opinion retrieval. ...
We also define a simple topical opinion retrieval function that is free from parameters, so that the retrieval does not need any learning or tuning phase. ...
Furthermore, the content-only score is obtained applying the query expansion technique (we used a parameter free model of query expansion with 3 top ranked documents and 20 expansion terms). ...
dblp:conf/trec/AmatiABGG07
fatcat:fpxseyjrfbdazmuelpalykydtu
Exploring criteria for successful query expansion in the genomic domain
2008
Information retrieval (Boston)
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Based on the outcome of these experiments, we discuss the success factors required for effective query expansion with respect to various sources of term expansion, such as corpus-based cooccurrence statistics ...
Query Expansion is commonly used in Information Retrieval to overcome vocabulary mismatch issues, such as synonymy between the original query terms and a relevant document. ...
The authors would also like to thank the reviewers for their helpful comments. ...
doi:10.1007/s10791-008-9073-9
fatcat:rpfredqpjzdulds7b7q5qrjuhq
Less is More: Pre-train a Strong Text Encoder for Dense Retrieval Using a Weak Decoder
[article]
2021
arXiv
pre-print
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Our experiments on web search, news recommendation, and open domain question answering show that our pre-trained model significantly boosts the effectiveness and few-shot ability of dense retrieval models ...
Dense retrieval requires high-quality text sequence embeddings to support effective search in the representation space. ...
Acknowledgements We would like to thank anonymous reviewers for their valuable comments. ...
arXiv:2102.09206v3
fatcat:a4b4nt72brafpavo2ql23cq25i
IR evaluation methods for retrieving highly relevant documents
2000
Proceedings of the 23rd annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '00
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We then demonstrate the use of these evaluation methods in a case study on the effectiveness of query types, based on combinations of query structures and expansion, in retrieving documents of various ...
The results indicate that the tested strong query structures are most effective in retrieving highly relevant documents. ...
We thank the FIRE group at University of Tampere, especially Heikki Keskustalo and Eero Sormunen, for helpful comments, and Heikki Keskustalo and Timo Tervola for programming efforts for data analysis. ...
doi:10.1145/345508.345545
dblp:conf/sigir/JarvelinK00
fatcat:hkpa4u7czngshfmmfjrv5ujovm
Automatic query expansion: A structural linguistic perspective
2014
Journal of the Association for Information Science and Technology
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More generally, when our new query expansion approach is applied to large-scale web retrieval it demonstrates significant improvements in retrieval effectiveness over a strong baseline system, based on ...
Automatic query expansion is the process of reformulating the original query with the goal of improving retrieval effectiveness. ...
Therefore, Figure 5 shows the correlation on a perquery basis of the gain in MAP of TQE over noFB for various query lengths. 10 This graph shows a relatively weak Table 5 Retrieval results for verbose ...
doi:10.1002/asi.23065
fatcat:mltt6nw44raj7nessq5y2cglmm
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