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In this paper a new forecast approach of coal mine water inrush based on microseismic monitoring technique was introduced. Coal rock microseismic signal was characterized by wide frequency band and rich frequency spectrum, so that microseismic monitoring technique could be used to detect the dynamical changes of coal rock and therefore it was possible to predict water inrush in mine by analyzing the...
In this paper, we present an adaptive refinement ratio algorithm for structured adaptive mesh refinement (SAMR) method based on SAMRAI framework. We developed our algorithm based on an example application program of SAMRAI framework, an AMR Euler gas dynamics application. The Euler class of this application provides routines for a sample application code that solves the Euler equations of gas dynamics...
A great number of real network models exhibit the classical characteristics of networks: an exponential degree distribution, high clustering coefficient and a short average path length (APL). In order to construct more really network models, the process of adding edges is divided into two processes based on Wang Bing model that Wang Bing proposes a kind of Evolving scale-free network model with tunable...
This paper presents a study on scaling properties of polarization mode dispersion of spun fibers in the presence of random mode coupling. Simple equations are obtained for both optimal and non-optimal spin conditions
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