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Online social media has become one of the most important ways people communicate, while how to find valuable information from huge amounts of data becomes a key problem. We present a novel topic extraction method that employs topic value of each words and social model attributes as additional features based on the multi-document summarization. The experimental results show that the multi-document...
A scheme is proposed to hide data in images based on a prioritised ordering of the content of the host image. The embedding process uses the watermark strength to determine the ordering of the 16 regions resulting from the second level wavelet transform DWT decomposed content of the host image. The DWT decomposed sub-bands of the cover image were analysed, transformed using the Pixel Value Difference...
This paper investigates the problem of acquiring planar object maps of indoor household environments in particular kitchens. The objects modeled in these maps include tables, walls and ceilings. Our segmentation approach is based on 3D point cloud data representations. In order to solve the segmentation problem in complicated environment, a variable model is used in this paper. It is applied in 3D...
Extract DTD documents rapidly by using pattern extraction method and eliminate the embedded ring in DTD by redefining the duplication name in document to solve the complex situation of which the embedded ring existed in XML document and the optimization scheme based on the interval encoding index can't solve. Map back DTD which eliminate the embedded ring to XML document, analyze XQuery query statement...
Unknown protocol identification is widely used in the field of network and information security. Most previous researches focus on known protocol identification and analysis of network layer and above. However, the research on unknown protocol is an essential part for ensuring the safety of information system. In this work, a length identification method of unknown data frame is proposed based on...
Sina Weibo is the most popular and fast growing microblogging social network in China. However, more and more spam messages are also emerging on Sina Weibo. How to detect these spam is essential for the social network security. While most previous studies attempt to detect the microblogging spam by identifying spammers, in this paper, we want to exam whether we can detect the spam by each single Weibo...
This paper introduces a concept of information entropy to judge web-page types, which associates with the method put forward by Roadrunner that pre-purifying topic pages and then using proportional relation to judge the type of pages. With some typical pages from large website home, the average precision could be reached to 96.7%, which lays foundation for further information extracting work.
The quality performance evaluation of long term stored missile weapon is very necessary for the capacity determination of equipment support and combat mission accomplishment ability. Because the classical evaluation methods are affected by index system acquirement, modeling method, experts' resources restriction, etc., the objectivity and correctness of evaluation results are decreased. In order to...
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