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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