Taking rigid disk surface as an example, fractal parameters are obtained by means of power spectrum and structure function, providing a proper geometric model for further contact analysis.

实验结果表明，分形维数能很好地表征表面轮廓，可为进一步的接触分析提供更合理的几何模型。

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The geometric configuration, moving conditions and force conditions of the tooth surface and the process of rock disintegration must be studied in designing the cutting structure.

欲设计合理的齿面结构必须研究齿面的几何形状、运动状态、受力状态和岩石破碎过程。

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Because of the difference of measured surface, such as quality, surface situation, geometric structure and measured Angle, the error of the temperature occurred in the image.

但由于环境和被测物体的材质、表面几何结构和观测角度的影响，会使成像上表现的温度测量值结果产生一定的误差。

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The researchers in this study examined the geometric structure and behaviour of one of the rotavirus's surface proteins, called VP4, which plays a key role in binding on to the surface of a target cell, and breaking through its membrane.

BBC: NEWS | Health | Diarrhoea vaccine 'a step closer'