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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So in order to provide the theoretical foundation for the design of rigid disk, it is necessary to research the surface topography of rigid disk.

因此有必要研究硬盘磁盘磁头之间的接触状态，以便为硬盘设计提供理论依据。

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So in order to provide the theoretical foundation for the design of rigid disk, it is necessary to research the surface topography of rigid disk.

因此有必要研究硬盘磁盘磁头之间的接触状态，以便为硬盘设计提供理论依据。

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