Search Result Clustering Method at NTCIR-5 Web Query Expansion Subtask.
Hiroyuki Toda, Ryoji Kataoka · NTCIR · 2005
We use a retrieval system with search result clustering to tackle the NTCIR-5 WEB Query Term Expansion Subtask. The system clusters the search results in such a way as to make it easier for the user to select relevant documents as feedback documents. In addition, we select phrase words or named entities(NE) as query-expansion keywords from the feedback documents because these words tend to represent the characteristics of feedback documents and can retrieve relevant documents that were not retrieved by the initial keywords. Based on our evaluations, we report the efficiency of keyword expansion and the number of relevant documents in the feedback documents.