This paper provides an overview of the NTCIR-10 INTENT-2 task (the second INTENT task),
which comprises the Subtopic Mining and the Document Ranking subtasks. INTENT-2 …

Web search queries are usually short, ambiguous, and contain multiple aspects or
subtopics. Different users may have different search intents (or information needs) when …

Web search queries are usually vague, ambiguous, or tend to have multiple intents. Users
have different search intents while issuing the same query. Understanding the intents …

We propose methods for generating diversified rankings of subtopics of keyword queries.
Our methods are characterized by their awareness of hierarchical heading structure in …

We propose methods for ranking subtopics of a keyword query. Subtopics are also keyword
queries which specialize and/or disambiguate search intent behind their original query …

Authors write headings for splitting a document into multiple semantic blocks of different
topics. A block may include some other blocks, and the blocks in a document compose …

本論文では, 文書集合から必要な文書を検索する際に, 各文書内に現れる, 見出し付きブロック群が
成す階層構造の情報を用いて, 検索精度の向上と検索作業の効率化を実現する技術について論じる …