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中文摘要：
研究了不同标度下底泥颗粒物的表面分形特征．结果表明，底泥颗粒的表面在几个nm到几个μm之间一般都具有多重分形特征，而且在不同的标度范围内表面分形维数（Ds）具有一定的差异，在10^0-10^2量级之间，随图象分辨率的增大，相应的Ds一般呈变小的趋势．SEM图象计算出的Ds为2．32-2．42，AFM图象计算出的Ds为2．00-2．46，它们是是纯粹几何意义上的表面粗糙特征的描述．
英文摘要：
The surface fractal properties of sediment particles on different scales were studied. In general, the multifractal properties of sediment particle surface existed from tens of nanometers to micro-scale （μm）, and some difference had been found in surface fractal dimensions （ Ds ） among different scale ranges. In the range of images, the surface fractal dimensions （ D, ） calculated from the images decreased with the increase of their resolution. The Ds values of SEM images were 2. 32-2.42, and those of AFM images were 2. 00-2.46, which depicted the surface rugosity on the pure geometry meaning. The scale range for surface fractal dimensions by image methods was 10^0-10^2.
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