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- W2941526521 abstract "This paper investigates the selection of class-specific significant keywords for document databases. We define two types of significant keywords with respect to a document class: Elite and Unique Elite, derived in two phases. Elite Keywords are defined as those that have high term frequencies within the class. To obtain the top partition of distinctively high occurring terms in each class, we employ Maximum Entropy Partitioning (MEP) in the first phase. Our presumption is that the term probabilities within the subset of significant (and non-significant) keywords at the point of maximum entropy are relatively more uniform with respect to each other. Unique Elite keywords are those that are Elite for a particular class, and at the same time have a higher frequency of occurrence only in that class as compared to the other classes. To measure this aspect, in the second phase, we compute the entropy of each Elite keyword across all classes, sort the entropies in the ascending order and again employ MEP to shortlist those Elite keywords that occur uniquely in this class, characterized by distinctively low entropy. Experimental comparisons with the state-of-the-art on benchmark datasets using an ensemble of bagged tree classifiers, establishes the discriminatory powers of the derived keywords." @default.
- W2941526521 created "2019-05-03" @default.
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- W2941526521 date "2019-07-01" @default.
- W2941526521 modified "2023-09-27" @default.
- W2941526521 title "Finding significant keywords for document databases by two-phase Maximum Entropy Partitioning" @default.
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- W2941526521 doi "https://doi.org/10.1016/j.patrec.2019.04.023" @default.
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