Notes on Phrasal Indexing: JSCB Evaluation Experiments at NTCIR AD HOC
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چکیده
The evaluation experiments of the JSCB team are described with a focus on noun phrase indexing and its weighting issues in ad hoc text retrieval. Experiments on the effects of supplemental noun phrase indexing in view of the effect of various length of queries are reported. The results show that the noun phrase indexing outperforms single word only indexing with long queries while single word only indexing performs slightly better with short queries. A new weighting method for phrasal terms is also evaluated and improvement is observed.
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تاریخ انتشار 1999