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A level set method is proposed for flame front detection and curvature calculation on turbulent premixed OH Planar Laser Induced Fluorescence (OH-PLIF) images. The Flame front on an OH-PLIF image is detected by our proposed curve evolution model. In this model, a global term is designed to make the evolution curve converge to the flame front and a Gaussian kernel function is used to detect the flame...
With the theories of reliability mathematics, reliability system engineering and machine design, the paper presents the reliability analysis on the electrode plates driving system of the water resistance test system of high speed diesel locomotive. Stress - strength interference theory and item stress analysis are applied to its mechanical and electrical parts to derive reliability calculation formulae...
This paper describes a strongly coupled calculation procedure for the particle dynamics in electrostatic precipitators (ESPs) subjected to the applied magnetic field with the statistical particle size distribution taken into account. The turbulent gas flow and the particle motion under external forces are modeled by using the commercial computational fluid dynamics code FLUENT. Numerical calculations...
Specific to evaluation of students quality, mathematical model is built with the method of fuzzy clustering analysis in this paper. The problem of student rank and category is discussed, which offered a better choose for evaluating quality of students.
The semiarid area of western Heilongjiang province is a important grain production base in China, in the area the nature characteristics is small quantity and concentrate distribution in rainfall, and agriculture development was restricted by drought and soil and water loss seriously. Surface runoff not only leads to rainfall use efficiency decrease, it is also the important factor which causes soil...
Aiming at the problems of great demand of samples, applicability and simulation precision of the routine empirical statistical soil erosion models, based on the reasonable extension of the high-order grey dispersed array dynamic model GWS(n,1) a multivariable high-dimension non-linear index model GWS(n,m)was established. Through the optimization by MATLAB, the searching and identification of the parameters...
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