Title
Toshiba BRIDJE at NTCIR-5 CLIR: Evaluation using Geometric Means.
Abstract
Toshiba participated in the Monolingual and Bilin-gual IR tasks at NTCIR-5 CLIR using the BRIDJE system. We submitted 24 runs covering three topic languages (Japanese, English and Chinese) and two document languages (Japanese and English), and achieved the highest performances in the E-J-T, E-J-D, C-J-T, C-J-D, J-E-T and J-E-D subtasks. This paper (re-)examines Partial Disambiguation and the Pivot Language approach for Bilingual IR, Selective Sampling with memory Resetting for Mono/Bilingual IR and a new Monolingual IR strategy called Bounce-and-Throw, using the Geometric Mean versions of Av-erage Precision and Q-measure in addition to the stan-dard Arithmetic Mean ones. Our analyses show that the Geometric Mean, which focusses on the "harder" topics, provides new insight into retrieval effectiveness evaluation. Keywords: Partial Disambiguation, Selective Sam-pling, Bounce-and-Throw, Q-measure, Geometric Mean.
Year
Venue
Keywords
2005
NTCIR
geometric mean
Field
DocType
Citations 
Pivot language,Arithmetic mean,Computer science,Speech recognition,Sampling (statistics),Artificial intelligence,Natural language processing,Geometric mean
Conference
2
PageRank 
References 
Authors
0.85
12
5
Name
Order
Citations
PageRank
Tetsuya Sakai11460139.97
Toshihiko Manabe2908.90
Akira Kumano36510.04
Makoto Koyama4838.49
Tomoharu Kokubu5314.68