Objective For low-voltage current transformer surface crack detection,traditional methods can not effectively distinguish cracks and scratches problem,crack detection method is proposed based on geometrical features a...
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ISBN:
(纸本)9781509046584
Objective For low-voltage current transformer surface crack detection,traditional methods can not effectively distinguish cracks and scratches problem,crack detection method is proposed based on geometrical features and Moment *** Extraction algorithm by osmosis from the gray image of the target area,according to the crack and scratches different texture features,the use of geometric features and invariant moments,determine the characteristic parameters threshold,and finally using clustering algorithm to determine the threshold determination cracks and scratches to be *** After tests proved that the method can effectively distinguish cracks and scratches,and to solve the noise problem on low-voltage current transformer crack *** Compared with the traditional object of cracks and scratches detection methods,the method proposed in this paper has the mathematical property of invariant to rotation,translation and size of image,and it is also used to detect the crack image in the moving state.
A procedure to evaluate surface-to-air missile battery placement patterns for air defense is presented. A measure of defense effectiveness is defined as a function of kill probability of the defense missiles and the n...
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A procedure to evaluate surface-to-air missile battery placement patterns for air defense is presented. A measure of defense effectiveness is defined as a function of kill probability of the defense missiles and the nature of the surrounding terrain features. The concept of cumulative danger index is used to select the best path for a penetrating hostile aircraft for any given pattern of placement. The aircraft is assumed to be intelligent and well-informed. The path is generated using a dynamic programming methodology. The software package so developed can be used off-line to choose the best among a number of possible battery placement patterns.
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