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Ore recovery depends on the stope structure parameters, at the same time, stope safety will be changed according to difference stope structure parameters. A mechanics model of stope structure of room and pillar mining method is established with FLAC3D, a finite difference software, in this paper. And the stope stability changing with crustal stress and stope structure parameters is simulated. The...
The improved grey correlative model was put forward in order to improve the objectivity of grey synthetic evaluation method. Balanced degree was ascertained by entropy theory. Weighted grey correlative degree was synthesized by grey correlative coefficient and entropy weights. Balanced adjacent degree, which was derived from weighted grey correlative degree and balanced degree, was taken as the evaluation...
Today's fast developing modern information technology not only has a great impact on the social and economic activities but also more importantly has caused the innovation of modern auditing technology. In order to keep pace with the development of modern audit, the author adopted the method of computer data mining to analyze large quantities of data collected from the audited corporate, and work...
For resolving the problem that the existing protocol of secure two-party vector dot product computation has the low efficiency and may disclose the privacy data, a method which is effective to find frequent item sets on vertically distributed data is put forward. The method uses semi-honest third party to participate in the calculation, put the converted data of the parties to a third party to calculate...
In this paper we present clustering method is very sensitive to the initial center values, requirements on the data set too high, and cannot handle noisy data the proposal method is using information entropy to initialize the cluster centers and introduce weighting parameters to adjust the location of cluster centers and noise problems. The navigation datasets which are sequential in nature. Clustering...
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