Keywords are index terms that contain most important information. Automatic keyword extraction is the task to identify a small set of words , keyphrases or keywords from a document that can describe the meaning of document. Keyword extraction is considered as core technology of all automatic processing for text materials. In this paper, a Survey of Keyword Extraction techniques have been presen...

Keyword extraction attracts much attention for its significant role in various natural language processing tasks. While some existing methods for keyword extraction have considered using single type of semantic relatedness between words or inherent attributes of words, almost all of them ignore two important issues: 1) how to fuse multiple types of semantic relations between words into a unifor...

In recent years, many private corporations and government organizations have digitized corpuses of legacy paper documents. Often, these organizations hope to take advantage of digital representations to transform costly manual tasks associated with paper archives into less-costly computer-assisted tasks. The most common approach toward automated information extraction is through inverted indexi...

Let γ(G) and ι(G) be the domination and independent domination numbers of a graph G, respectively. Introduced by Sumner and Moorer [23], a graph G is domination perfect if γ(H) = ι(H) for every induced subgraph H ⊆ G. In 1991, Zverovich and Zverovich [26] proposed a characterization of domination perfect graphs in terms of forbidden induced subgraphs. Fulman [15] noticed that this characterizat...

Abstract For large amount of patent texts, how to extract their keywords in an unsupervised way is a very important problem. In existing methods, only the own information texts analyzed. this study, improved TextRank model proposed, which prior public knowledge effectively utilized. Specifically, two following points are first considered: (1) network constructed for each text, (2) based on dict...

Data hiding in video is an important research issue as the traditional methods are error prone and leads to distortion. However, most of the video data hiding methods utilize uncompressed video data. Recent video data hiding techniques are focused on the characteristics generated by video compressing standards. A new blind data hiding method is proposed based on a novel concept of forbidden zon...