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Through particular analysis of manufacturability for toy helicopter, this paper presents the main technical process of injection mould design and manufacturing. The best kind and position of gate is discussed, the Harvard structure and side parting core-pulling structure guided by angle pins are adopted, and the problem of plastic parts demoulding after moulding is perfectly solved. The whole mould...
Firstly, the paper designs a novel broad beamwidth microstrip antenna at 16GHz, whose 3dB beamwidth is up to 170 degrees. Then a conformal phased array on conical surface is designed by means of the present broad beamwidth microstrip antenna. To achieve effective beam scanning in whole elevation and rolling planes, the whole rolling plane has been divided into six sections. Numerical results show...
Image denoising and enhancement is one of the most important tasks in image processing. Self-snake model is a most basic and important image denoising method based on PDE (Partial Differential Equation), in which the stop function is very important and is usually related to the gradient of the image. But it?s difficult to choose the smoothness scale as we usually do in acquiring the gradients of the...
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