Keyword extraction by entropy difference between the intrinsic and extrinsic mode

Zhen Yang, Jianjun Lei, Kefeng Fan and Yingxu Lai

Physica A: Statistical Mechanics and its Applications, 2013, vol. 392, issue 19, 4523-4531

Abstract: This paper proposes a new metric to evaluate and rank the relevance of words in a text. The method uses the Shannon’s entropy difference between the intrinsic and extrinsic mode, which refers to the fact that relevant words significantly reflect the author’s writing intention, i.e., their occurrences are modulated by the author’s purpose, while the irrelevant words are distributed randomly in the text. By using The Origin of Species by Charles Darwin as a representative text sample, the performance of our detector is demonstrated and compared to previous proposals. Since a reference text “corpus” is all of an author’s writings, books, papers, etc. his collected works is not needed. Our approach is especially suitable for single documents of which there is no a priori information available.

Keywords: Keyword extraction; Entropy difference; Intrinsic mode; Extrinsic mode (search for similar items in EconPapers)
Date: 2013
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:392:y:2013:i:19:p:4523-4531

DOI: 10.1016/j.physa.2013.05.052

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