NTCIR-2 Experiments Using Long Gram Based Indices
نویسندگان
چکیده
Long gram based indices are experimented at NTCIR-2. In making gram based indices, no analyses such as morphological ones are required. The accessing number, titles, abstracts and keywords are extracted from NTCIR-2 documents. The total index size is 1.43Gbyte and time to make indices is about 100 minutes. Average retrieval time per topic takes 21 seconds since documents are ranked in a Perl program which is simple and not fast. Ranking algorithm used is based on a traditional probabilistic model, and the result is standard average precision.
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