| 摘要 |
Sentence polarity determination is used to assess whether a sentence is an affirmative expression or a negative expression, and is applied for reputation analysis, etc. Polarity determination determines whether an input sentence is affirmative or negative, but when some subject is talked about it is sometimes desired to determine whether what is referred to in a sentence is affirmative or negative, and not the polarity of the sentence itself. The present invention provides a method for taking what is referred to in a sentence into account and then determining the polarity of the sentence by applying a recursive polarity rule based on the syntactic dependency structure of the sentence. Furthermore, it is possible to keep the number of rules from becoming inordinately large due to the characteristic of recursive rules, and to perform efficient polarity determination in view of memory size and calculation load. Furthermore, it is possible to efficiently control the length of the syntactic dependency needed for polarity determination. |
