图象法确定底泥颗粒物的表面分形维数(Ds)
COMPUTATION OF THE SURFACE FRACTAL DIMENSION(DS) FROM MICRO-IMAGES OF SEDIMENT PARTICLES
-
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.Abstract: 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(Ds) 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 dimensionsby image methods was 100—102.
-
Key words:
- sediment particle /
- scales /
- surface fractal properties /
- image methods
-
-
![WeChat](http://eekw.rcees.ac.cn//eekw-data/hjhx/2006/4/PIC/wechat_cnhjhx_1233.jpg)
计量
- 文章访问数: 459
- HTML全文浏览数: 459
- PDF下载数: 251
- 施引文献: 0