An analysis of the coherence of descriptors in topic modeling. Issue 13 (1st August 2015)

• Record Type: Journal Article
• Authors: O'Callaghan, Derek; Greene, Derek; Carthy, Joe; Cunningham, Pádraig
• Is Part Of: Expert systems with applications. Volume 42:Issue 13(2015)
• Page Start: 5645
• Page End: 5657
• Publication Date: 2015-08-01
• Subjects: Expert systems (Computer science) -- Periodicals; Systèmes experts (Informatique) -- Périodiques; Electronic journals; 006.33
• DOI: 10.1016/j.eswa.2015.02.055
• Languages: English
• ISSNs: 0957-4174

Abstract

<abstract xml:lang="en" abstract-type="author-highlights" id="ab005"> <title id="st075">Highlights</title> <sec> <p id="sp005"> <list id="l0005"> <list-item id="u0005"> <label></label> <p id="p0215">We evaluate the coherence and generality of topic descriptors found by LDA and NMF.</p> </list-item> <list-item id="u0010"> <label></label> <p id="p0220">Six new and existing corpora were specifically compiled for this evaluation.</p> </list-item> <list-item id="u0015"> <label></label> <p id="p0225">A new coherence measure using word2vec-modeled term vector similarity is proposed.</p> </list-item> <list-item id="u0020"> <label></label> <p id="p0230">NMF regularly produces more coherent topics, where term weighting is influential.</p> </list-item> <list-item id="u0025"> <label></label> <p id="p0235">NMF may be more suitable for topic modeling of niche or non-mainstream corpora.</p> </list-item> </list> </p> </sec> </abstract>