Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Japanese Probabilistic Information Retrieval Using Location and Category
  Information   Robertson's 2-poisson information retrieve model does not use location and
category information. We constructed a framework using location and category
information in a 2-poisson model. We submitted two systems based on this
framework to the IREX contest, Japanese language information retrieval contest
held in Japan in 1999. For precision in the A-judgement measure they scored
0.4926 and 0.4827, the highest values among the 15 teams and 22 systems that
participated in the IREX contest. We describe our systems and the comparative
experiments done when various parameters were changed. These experiments
confirmed the effectiveness of using location and category information.

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The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
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The categories of this paper are: math
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph