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Relative reduction of billet height is one of the most important parameters of the forging process, which has great influence on forging quality. The inner defects compaction analysis models and the material damage analysis models of squaring, stretching and chamfering processes of long-axis heavy forging were established based on the software DEFORM-3D, and the influences of the relative reduction...
In accordance with the ink cell structural redundancy of laser gravure image, a method of laser gravure image lossless compression by eliminating the ink cell structural redundancy is presented. At first the background of the ink cell is introduced. The problem of high resolution and high-capacity laser gravure image stored and transmitted is analyzed. Then the compression method is proposed based...
Spin-forming of cup-shaped thin-walled trapezoidal inner-gear is a new technology of the near-net forming in gear manufacturing field. Experiments and FEM simulations shows that the quality of workpiece is greatly influenced by the forming process method. The defects, such as the un-uniform distribution of tooth height along the axial and tangential directions and the wave-shaped opening-end of workpiece...
In accordance with the two-dimensional structural dependence of color cartoon image and the entropy coding theory in data compression, a method of color cartoon image lossless compression by eliminating the structural redundancy is presented. At first it is proved that the entropy of image can be reduced by way of removing the solid region. Then the method of removing the structural redundancy is...
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