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100—102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.
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.
出处
《环境化学》
CAS
CSCD
北大核心
2006年第4期400-404,共5页
Environmental Chemistry
基金
国家自然科学基金资助项目(20407004
50178009)
霍英东青年教师基金资助项目(91078).
关键词
底泥颗粒物
标度
表面分形特征
图象法.
sediment particle, scales, surface fractal properties, image methods.
