Bohong Liu

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Fractal image coding based on quadtree is a novel technique for still image compression. Compared with other image compression methods, fractal image coding has the advantage of higher compression ratio, higher decoding speed and decoded image having nothing to do with the resolution of image. However, it spends too much time to look for the best matching(More)
Cylinder, which converts pressure of compressed gas into mechanical energy, is one of main pneumatic actuators in electromechanical products. With application of cylinder becoming broader and broader, the demand on high reliability of cylinder gets more and more urgent. In order to improve the reliability of cylinder, it must be made clear the failure(More)
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