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This paper has researched how to use incremental inserting algorithm to build delaunay triangulation net work, explained in detail how to construct a rectangular bunding box for the initial triangulation; how to determine the relationship between the point to be inserted and the triangle, and analyzed the results of the different subdivision based on the different relationship. It has also researched...
Geographic routing is widely used in wireless sensor networks due to its great efficiency, good scalability and computed routing close to the best possible. However, the problem that geographic routing uses GPS receivers or location algorithms to obtain nodes' geographic information leads to expensive cost and high overhead. Aiming at this problem, we present a Landmark-based Virtual Geographic Routing...
In recent decades, the buffer overflow has been a source of many serious security issues. In recent years, by the CERT/CC (Computer Emergency Response Term/Coordination Center) issued advice on the buffer overflow vulnerability for more than accounted for 56.76%. Attack based on the buffer overflow loophole has brought serious harm to computer network. How to effectively eliminate attack based on...
Chinese word segmentation is important for understanding and dealing with Chinese natural language, and it is also a important part of search engineer, text retrieval, speech recognition, automatic translation. Chinese word segmentation is challenging because there is no space or physical means to mark the boundaries of words. It is often difficult to define what constitutes a word in Chinese. Currently,...
With the widespread use of broadband network, the firewall, as a filter installed on the border of network, can easily cause congestion and becomes the bottleneck of network transmission. The Web Monitoring System Based on the URL Analysis introduced in this paper replicates the user Web request by the use of the monitoring technology, extracts and analyzes the URL of user request. Then the URL will...
This paper try to establish a Chinese system on a embedded system by discussing dot matrix coding, displaying and inputting approach of Chinese characters, it elaborates font codes of Chinese characters and their displaying process, and also describes the inner code, GB code and area code of the character system, and then introduces a high efficiency inputting-indexing way and two additional data...
As a new, environmentally friendly, green active source, air-gun is widely applied in marine seismic exploration. This paper reviews the basis of single air-gun wavelet theoretically and related equations, analyzes several parameters which affect air-gun source wavelet. On the basis of Ziolkowski model, we simulate large volume air-gun array far-field wavelet, which is characterized with high primary-bubble...
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