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.
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。
The hydraulic state in critical downhill section of long pipeline is unusual, and installing pressure regulation station is a widely used method for meeting its special requirement.
输油管道的大落差段有特殊的水力状态，设置压力调节站是适应这种水力状态而广泛采用的技术。
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