A curve approximation method based on Cellular Automata was produced, and was applied to digitalapproximation of hydraulic turbine performance data.
给出一种基于元胞自动机的曲线逼近方法，并将这种方法应用于对水轮机的特性数据进行数值逼近。
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A series of Gaussian digitalapproximation filters used in roundness measurement were designed on the basis of approximation method and bilinear transformation.
By using MATLAB signal and using window method, frequency sampling and Chebyshev approximation the design of low pass digital filter in the toolbox have been processed.