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Multilingual Experiments of UTA at CLEF 2003: The Impact of Different Merging Strategies and Word Normalizing Tools

Eija Airio, Heikki Keskustalo, Turid Hedlund, Ari Pirkola
2003 Conference and Labs of the Evaluation Forum  
The index words can be stored as such (inflected index), or normalized. The most common normalizing method in IR is stemming.  ...  University of Tampere used the raw score approach as the baseline in the CLEF 2003 runs and tested two new merging approaches. No remarkable differences were found between the merging methods.  ...  Acknowledgements The InQuery search engine was provided by the Center for Intelligent Information Retrieval at the University of Massachusetts.  ... 
dblp:conf/clef/AirioKHP03a fatcat:lrr7756tnbbrviheknfytnwniy

Merging Results by Predicted Retrieval Effectiveness [chapter]

Wen-Cheng Lin, Hsin-Hsi Chen
2004 Lecture Notes in Computer Science  
The results show that the normalizedby-top-k merging with translation penalty and collection weight outperforms the other merging strategies except the raw-score merging.  ...  We introduced three factors affecting the retrieval effectiveness, i.e., the degree of translation ambiguity, the number of unknown words and the number of relevant documents in a collection for a given  ...  The performances of our merging strategies were better than normalized-score merging and round-robin merging, but were worse than raw-score merging in single IR system environment.  ... 
doi:10.1007/978-3-540-30222-3_19 fatcat:ka6ximufy5dmvlyzldd7ngj4du

The impact of evaluation on multilingual text retrieval

Julio Gonzalo, Carol Peters
2005 Proceedings of the 28th annual international ACM SIGIR conference on Research and development in information retrieval - SIGIR '05  
We summarize the impact of the first five years of activity of the Cross-Language Evaluation Forum (CLEF) on multilingual text retrieval system performance and show how the CLEF evaluation campaigns have  ...  contributed to advances in the state-of-the-art.  ...  Trivial merging strategies, such as raw-score merging or roundrobin techniques, provide reasonable results on the CLEF testbed, due to the balanced amount of relevant information across languages.  ... 
doi:10.1145/1076034.1076149 dblp:conf/sigir/GonzaloP05 fatcat:2mjbi2xhpbc6njpofwuvjfahru

Merging Multilingual Information Retrieval Results Based on Prediction of Retrieval Effectiveness

Wen-Cheng Lin, Hsin-Hsi Chen
2004 NTCIR Conference on Evaluation of Information Access Technologies  
Experimental results show that the performance of normalized-by-top-k merging with translation penalty and collection weight is similar to that of raw-score merging and better than that of the other merging  ...  The translation penalty and collection weight are considered to improve merging performance. Several merging strategies are experimented.  ...  Acknowledgements The research was supported in part by National Science Council, Taiwan, under project number NSC 93-2752-E-001-001-PAE.  ... 
dblp:conf/ntcir/LinC04 fatcat:zchbfsqa5rembow6nbijd3ufhe

A merging strategy proposal: The 2-step retrieval status value method

Fernando Martínez-Santiago, L. Alfonso Ureña-López, Maite Martín-Valdivia
2006 Information retrieval (Boston)  
This approach, which we call 2-step RSV (RSV: Retrieval Status Value), is based on the re-indexing of the retrieval documents according to the query vocabulary, and it performs noticeably better than traditional  ...  After searching in these corpora and obtaining a result list per language, we must merge them in order to provide a single list of retrieved articles.  ...  The rest of the paper is organized as follows. Firstly, we present a brief revision of the most well-used methods for merging strategies. Section 3 and 4 describe our proposed method.  ... 
doi:10.1007/s10791-005-5722-4 fatcat:cpaskditt5gxhirl7iewq76hae

Indexing and weighting of multilingual and mixed documents

Mohammed Mustafa, Izzedin Osman, Hussein Suleman
2011 Proceedings of the South African Institute of Computer Scientists and Information Technologists Conference on Knowledge, Innovation and Leadership in a Diverse, Multidisciplinary Environment - SAICSIT '11  
This paper attempts to address the problem of multilingual querying in CLIR.  ...  Experimentally, results show that current CLIR techniques were not designed for these types of multilingual queries and documents and are found to perform poorly whereas the proposed techniques are found  ...  This research is supported by the University of Cape Town, the Telkom/NSN/Telesciences/THRIP Center of Excellence and the National Research Foundation. Run Average DCG @ top  ... 
doi:10.1145/2072221.2072240 dblp:conf/saicsit/MustafaOS11 fatcat:dewybrrh35gjblhv7opqv4lkau

CONTROL: CLEF-2003 with Open, Transparent Resources Off-Line

Monica Rogati, Yiming Yang
2003 Conference and Labs of the Evaluation Forum  
Our goal is to be one of the CLEF participants who show that the hypothetical performance drop is not large enough to justify the loss of control and transparency, especially for research systems.  ...  We participated in two bilingual runs and the small multilingual run using software and data that are free to obtain, transparent and modifiable.  ...  The number of feedback documents and words were tuned for each language. Merging strategies We examined two simple merging strategies: normalizing the individual scores and two step RSV [7] .  ... 
dblp:conf/clef/RogatiY03a fatcat:32cealsotzgu7axxzts6cqqasy

Combining Multiple Strategies for Effective Monolingual and Cross-Language Retrieval

Jacques Savoy
2004 Information retrieval (Boston)  
Finally, we suggest a collection merging strategy based on logistic regression that tends to perform better than other merging approaches.  ...  This paper describes and evaluates different retrieval strategies that are useful for search operations on document collections written in various European languages, namely French, Italian, Spanish and  ...  The author would like to thank the three anonymous referees for their helpful suggestions and remarks.  ... 
doi:10.1023/b:inrt.0000009443.51912.e7 fatcat:vpdkttg7y5bijmnzlmh5wkar7u

Exeter at CLEF 2003: Experiments with Machine Translation for Monolingual, Bilingual and Multilingual Retrieval [chapter]

Adenike M. Lam-Adesina, Gareth J. F. Jones
2004 Lecture Notes in Computer Science  
The University of Exeter group participated in the monolingual, bilingual and multilingual-4 retrieval tasks this year.  ...  We adopted a document translation strategy and tested four different merging techniques to combine results from the different sources to achieve an optimal performance.  ...  Table 8 Retrieval results for small Multilingual task before and after applications of different merging strategies.  ... 
doi:10.1007/978-3-540-30222-3_26 fatcat:r3uzobm57rekzabqsgboab4zs4

Learning to Translate for Multilingual Question Answering

Ferhan Ture, Elizabeth Boschee
2016 Proceedings of the 2016 Conference on Empirical Methods in Natural Language Processing  
In addition to direction, there are multiple methods to perform the translation, four of which we explore in this paper: word-based, 10-best, contextbased, and grammar-based.  ...  We build a feature for each combination of translation direction and method, and train a model that learns optimal feature weights.  ...  Acknowledgements Jacob Devlin has provided great help in the design and implementation of the context-based question translation approach.  ... 
doi:10.18653/v1/d16-1055 dblp:conf/emnlp/TureB16 fatcat:eja3yohw4zaj3obhl2mgmfovsq

Learning to Translate for Multilingual Question Answering [article]

Ferhan Ture, Elizabeth Boschee
2016 arXiv   pre-print
In addition to direction, there are multiple methods to perform the translation, four of which we explore in this paper: word-based, 10-best, context-based, and grammar-based.  ...  We build a feature for each combination of translation direction and method, and train a model that learns optimal feature weights.  ...  Acknowledgements Jacob Devlin has provided great help in the design and implementation of the context-based question translation approach.  ... 
arXiv:1609.08210v1 fatcat:7rnfctatzbbytppuuxc5aizbdm

Cross-Language Retrieval for the CLEF Collections — Comparing Multiple Methods of Retrieval [chapter]

Fredric C. Gey, Hailing Jiang, Vivien Petras, Aitao Chen
2001 Lecture Notes in Computer Science  
For our participation in CLEF, the Berkeley group participated in the monolingual, multilingual and GIRT tasks.  ...  The GIRT task performed English-German Cross-Language IR by comparing commercial machine translation with thesaurus lookup techniques and query expansion techniques.  ...  A new stemming method was developed which maps classes of words to a representative w ord in both English and the targeted languages of French, German, and Italian.  ... 
doi:10.1007/3-540-44645-1_11 fatcat:32sjasfcnvbaxjsrgqethecpre

Report on CLIR Task for the NTCIR-4 Evaluation Campaign

Jacques Savoy
2004 NTCIR Conference on Evaluation of Information Access Technologies  
freely available translation tools used to translate English-language topics into Chinese, Japanese or Korean; and 3) to evaluate the relative performance of the various merging strategies used to combine  ...  Our project has three objectives: 1) to compare the retrieval performances of eleven IR models used to carry out monolingual retrievals with these languages; 2) to analyze the relative merit of various  ...  Acknowledgments This research was supported by the Swiss NSF (Grants #21-66 742.01 and #20-103420/1).  ... 
dblp:conf/ntcir/Savoy04 fatcat:hbbre7bk6fd25d6unvylyapq6a

Comparative study of monolingual and multilingual search models for use with asian languages

Jacques Savoy
2005 ACM Transactions on Asian Language Information Processing  
Based on the NTCIR-4 test-collection, our first objective is to present an overview of the retrieval effectiveness of nine vector-space and two probabilistic models that perform monolingual searches in  ...  query in order to retrieve pertinent documents written in one of the three Asian languages.  ...  These divergences may have an impact on some of our merging strategies (see Section 3).  ... 
doi:10.1145/1105696.1105701 fatcat:zpiscx4znzgyvfyzqqsxxckniq

Combination Approaches for Multilingual Text Retrieval

Martin Braschler
2004 Information retrieval (Boston)  
We discuss the implications of building a system that allows flexible combination, give details of the various translation resources and methods, and investigate the impact of merging intermediate results  ...  The central aspect of our efforts is the use of combination approaches, effectively combining multiple language pairs, translation resources and translation methods into one multilingual retrieval system  ...  The paper has benefited from the work of three anonymous reviewers, who provided detailed and helpful comments. Their input is greatly appreciated. Note 1.  ... 
doi:10.1023/b:inrt.0000009445.19495.46 fatcat:qzdsergfjncdtfjstub4usp7vm
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