借助于不同的色散公式，运用单纯形法拟合测得的透过率光谱曲线，从而获得薄膜的光学常数和厚度。

Based on the dispersion equations, 'Downhill Simplex' method is utilized to measure the thickness and optical constants of thin film by fitting the curve of measured transmission spectrum.

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本文研究了加工经可控曲率修正的蜗轮齿面的滚刀设计问题，建立了相应的数学模型，并应用计算铲磨蜗轮滚刀刃形曲线的单参数包络法，求出铲磨砂轮截形曲线。

This paper studies the relief grinding problem of the hob of point contact worm gear drive and puts forward a one-parameter enveloping method to calculate the axial profile of relief grinding wheel.

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鉴于这种情况，我们先使用低通滤波对轮廓曲线作光顺处理，随后再采用基于面积误差的多边形逼近法对曲线作逼近处理。

And they are often distorted. First, a low passed filter is used to smooth the contour. And a polygon approximating method based on area error is used to approximate the contour.

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