Document (#32919)

Author
Fujita, S.
Title
Technology survey and invalidity search : a comparative study of different tasks for Japanese patent document retrieval
Source
Information processing and management. 43(2007) no.5, S.1154-1172
Year
2007
Abstract
A comparative study of two types of patent retrieval tasks, technology survey and invalidity search, using the NTCIR-3 and -4 test collections is described, with a focus on pseudo-feedback effectiveness and different retrieval models. Invalidity searches are peculiar to patent retrieval tasks and feature small numbers of relevant documents and long queries. Different behaviors of effectiveness are observed when applying different retrieval models and pseudo-feedback. These different behaviors are analyzed in terms of the "weak cluster hypothesis", i.e., terminological cohesiveness through relevant documents.
Footnote
Beitrag innerhalb eines Themenschwerpunkt "special issue on patent processing"
Field
Patentinformation

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