Computation on sentence semantic distance for novelty detection

	Computation on sentence semantic distance for novelty detection
	Zhang, HP ; Sun, J ; Wang, B ; Bai, S
	2005-05-01
发表期刊	JOURNAL OF COMPUTER SCIENCE AND TECHNOLOGY
ISSN	1000-9000
卷号	20 期号:3 页码:331-337
摘要	Novelty detection is to retrieve new information and filter redundancy from given sentences that are relevant to a specific topic. In TREC2003, the authors tried an approach to novelty detection with semantic distance computation. The motivation is to expand a sentence by introducing semantic information. Computation on semantic distance between sentences incorporates WordNet with statistical information. The novelty detection is treated as a binary classification problem: new sentence or not. The feature vector, used in the vector space model for classification, consists of various factors, including the semantic distance from the sentence to the topic and the distance from the sentence to the previous relevant context occurring before it. Now sentences are then detected with Winnow and support vector machine classifiers, respectively. Several experiments are conducted to survey the relationship between different factors and performance. It is proved that semantic computation is promising in novelty detection. The ratio of new sentence size to relevant size is further studied given different relevant document sizes. It is found that the ratio reduced with a certain speed (about 0.86). Then another group of experiments is performed supervised with the ratio. It is demonstrated that the ratio is helpful to improve the novelty detection performance.
关键词	novelty detection sentence semantic distance categorization
收录类别	SCI
语种	英语
WOS研究方向	Computer Science
WOS类目	Computer Science, Hardware & Architecture ; Computer Science, Software Engineering
WOS记录号	WOS:000229292300005
出版者	SCIENCE PRESS
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.204/handle/2XEOYT63/9949
专题	中国科学院计算技术研究所期刊论文_英文
通讯作者	Zhang, HP
作者单位	1.Chinese Acad Sci, Inst Comp Technol, Beijing 100080, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Zhang, HP,Sun, J,Wang, B,et al. Computation on sentence semantic distance for novelty detection[J]. JOURNAL OF COMPUTER SCIENCE AND TECHNOLOGY,2005,20(3):331-337.
APA	Zhang, HP,Sun, J,Wang, B,&Bai, S.(2005).Computation on sentence semantic distance for novelty detection.JOURNAL OF COMPUTER SCIENCE AND TECHNOLOGY,20(3),331-337.
MLA	Zhang, HP,et al."Computation on sentence semantic distance for novelty detection".JOURNAL OF COMPUTER SCIENCE AND TECHNOLOGY 20.3(2005):331-337.