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An image is often corrupted by much noise visible or invisible while being collected, acquired, coded and transmitted. Noise impairs the quality of the received image severely and may cause a big problem for further image processing. In order to improve the quality of an image, the noise must be removed when the image is preprocessed, and the important signal features should be retained as much as...
Traditional method of structural vibration control through stiffen the components, decoupling the harmonic resonance system, vibration and damping isolation, or dynamic vibration absorb, all rely structure damping consumption the energy, the control effect is limited because the constraints of materials performance. Piezoelectric smart structure with advantages such as fast response, arrangement flexible,...
The research of dynamic stability involve some subjects, and it is a new research developed recent decades. It is very complex of its instability mechanization because of it is a nonlinear differential equation, so it has not achieve a common view. Wavelets analysis can solve many difficult problems that Fourier analysis can not solve, which has become a new bench developing rapidly in mathematical...
Teeming with large-span and complex structure, it play a more and more important role in on-line monitor and diagnosis of structure health based on the advanced equipment and scientific methods. Not only the methods based on inherent frequency, or vibration mode changes, but also flexibility or stiffness changes measurement method, exist a common limitation which insufficient in the small and fatigue...
Underground Electro Magnetic Interference (EMI) has become so serious that there were false alarms in monitoring system, which induced troubles of coal mine safety in production. In order to overcome difficulties caused by the explosion-proof enclosure of the equipments and the limitation of multiple startup and stop in transient process during EMI measurement, a novel technique was proposed to measure...
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