Durian D J, Bideaud H, Duringer P, Schröder A, Thalmann F, Marques C M
Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, 19104-6396, USA.
Phys Rev Lett. 2006 Jul 14;97(2):028001. doi: 10.1103/PhysRevLett.97.028001. Epub 2006 Jul 13.
We propose to characterize the shapes of flat pebbles in terms of the statistical distribution of curvatures measured along the pebble contour. This is demonstrated for the erosion of clay pebbles in a controlled laboratory apparatus. Photographs at various stages of erosion are analyzed, and compared with two models. We find that the curvature distribution complements the usual measurement of aspect ratio, and connects naturally to erosion processes that are typically faster at protruding regions of high curvature.
我们建议根据沿卵石轮廓测量的曲率统计分布来描述扁平卵石的形状。这在一个受控的实验室装置中对粘土卵石的侵蚀情况进行了演示。分析了侵蚀各个阶段的照片，并与两个模型进行了比较。我们发现曲率分布补充了通常的长宽比测量，并自然地与在高曲率突出区域通常更快的侵蚀过程相联系。
