A method for automatic acquisition of Japanese grammar and unknown cognitive units
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概要
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A method for automatic acquisition of a grammar of Japanese based on morphemes from a corpus has already been proposed by the authors. This paper proposes a new method based on cognitive units, which have been experimentally found to be the units of the human process of sentence analysis, and have been known to be larger than morphemes. While the use of cognitive units can reduce the number of search paths, it may increase the number of unknown units and may degrade system performance. In order to cope with this problem, a method has been further introduced for identifying an unknown cognitive unit from known cognitive units. The proposed method was applied to the analysis of the 'weather-forecast' corpus, and the acquired grammar was used for parsing. The results indicated a higher processing efficiency for systems using cognitive units than for those using morphemes.
- 言語処理学会の論文
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