학위논문(박사) - 한국과학기술원 : 글로벌IT기술대학원프로그램, 2012.8, [ v, 60 p ]
Phrase-based Query Expansion; Wikipedia Categories; Topic Drift; 문구 기반 질의어 확장; 위키피디아 범주; 토픽 드리프트; Topic Scope Focus; Topic Scope Focus
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