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Large-scale goaf appeared after underground mining, and the widespread connection of the goaf is main reason causing surface subsidence. Surface subsidence is a serious engineering geological disaster impacted on ecological environment, which has plagued the underground mining enterprises at home and abroad. In order to ensure safety mining of the deep level and effectively control surface subsidence,...
The assessment index system of lightning disaster situation is established in this paper, based on the actual data of lightning disaster and combined with the value standard such as current population, economic and ecological factors. The calculation model for comprehensive evaluation of losses in lightning disasters is given by using the Analytical Hierarchy Process (AHP). It can provide scientific...
Most of grid applications require a large amount of memory resources. If there is not enough memory supplied during execution, the program performance will be significantly degraded by page swapping. To address this problem, we propose a remote paging system called Grid Remote Pager (GRP) for grid computing in this paper. Compared with other remote paging systems, GRP keeps high portability and transparency...
The urban green land information is very important for planning urban and improving its environment. Satellite remote sensing provides advanced technology for obtaining the urban green land. Extracting the urban green land respectively from Beijing-1 Micro-satellite (BJ-1MS) and SPOT images is studied and compared in Chengdu city of P.R. of China. The urban green land area can be accurately extracted...
More and more entriprises, organsizaions and goverments have used and distrubed information in word documents, pdf etc.. It makes easily to unauthorized copying and dissemination. According to DRM's requirements, we evaluated several text watermarking methods for instructing practical applications, and proposed a new approach in text watermarking where inter-character spaces are slightly modified...
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