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of shield tunnel[J]. Rock and Soil Mechanics, 2009, 30(5): 1307-1312. [15] YU Bo-ming. Fractal character for tortuous streamtubes in porous media[J]. Chinese Physics Letters, 2005, 22(1): 158-160. [16] XU Peng, YU Bo-ming. Developing a new form of permeability and Kozeny-Carman constant for homogeneous porous media by means of fractal geometry[J]. Advances in Water Resources, 2008, 31(1): 74-81. [17......
湖北蛇屋山红土型金矿床PSDs特征及其意义高帮飞1(1.北京市地质大学地质过程与矿产资源国家重点实验室中铁资源集团地质勘查有限公司)摘 要:土壤颗粒粒度分布(PSDs)是复杂物理化学作用的结果,研究表明,分形理论是刻画这一复杂过程的有利工具.通过对蛇屋山金矿床赋矿红土的PSDs研究发现,赋矿红土颗粒平均粒度在3.42~28.53μm之间,同时从风化壳浅部到深部有增加的趋势.分形统计学研究表明,赋矿红土PSDs在1.71~9.46μm范围内具有分形特征(R2>0.94),分维值(D)变化范围为2.86~2.......
): 1351-1358. ZHANG Fa-sheng, LIU Zuo-xin. Fractal theory and its application in the analysis of soil spatial variability: a review[J]. Chinese Journal of Applied Ecology, 2011, 22(5): 1351-1358. [11...-ling, LUO Yuan-pei, SHI Yuan-chun. Characterization of soil fractal dimension with the weight of particle size distribution[J]. Chinese Science Bulletin, 1993, 38(20): 1896-1899. [13] BRADSHAW......
纳米化锆合金腐蚀机理的分形研究 张新琴1,夏秀文1,叶林凤3 (1.井冈山大学数理学院,江西,吉安,343009;2.广西大学物理科学与工程技术学院,广西,南宁,530004;3.中国ASM集团技术信息部,上海,210900) 摘要:将纳米化Zr-4合金和普通Zr-4合金进行水腐蚀并得到腐蚀面的SEM,利用计算机图像处理技术提取金属/氧化膜界面形貌图,并研究腐蚀界面形貌的分形特征.研究表明:纳米化Zr-4合金的腐蚀产物更具有保护性,其抗腐蚀性能优于普通Zr-4合金:腐蚀界面的分形分维变化说明纳米化Zr-4合金和普通Zr-4合金腐蚀规律不同,并从分形的角度上进一步揭示纳米化Zr-4合金的腐蚀机理. 关键词:纳米金属; Zr-4合金; 水腐蚀; 分维; nanocrystalline metal; Zircaloy-4 alloy; water corrosion; fractal......
. The fractal dimension of EIS at different time was studied. The corrosion process and EIS evolution are divided into three stages. In the initial stage, EIS is composed of two overlapped capacitive arcs... with the immersion time. The fractal dimension obtained from the time records of EIS seems to be a promising tool for the analysis of corrosion morphology because of its direct relationship......
. The results indicate that the particle size distribution of both the upper and the lower sand-sliding slope has a fractal feature. The fractal dimension of the upper accumulation body and the repose angle... of the particles, the larger the fractal dimension of the upper accumulation body and the repose angle of sand-sliding slope. With the increase of friction coefficient, heterogeneous degree of contact force also......
; 文献标志码:A 文章编号:1672-7207(2013)03-1159-08 Generation technology of soil crack network by fractal interpolation method... method of soil crack network was proposed based on fractal interpolation theory. Meanwhile, the code was developed and the influence factor was discussed. Lastly, numerical examples were given to assess......
形维数,面孔隙度,孔径等参数合理预测多孔材料的体孔隙度,渗透性能,预测结果与实测结果吻合良好. 关键词:分形; 孔结构; 多孔材料; 分形维数; fractal; pore structure; porous materials; fractal dimension; [全文内容正在添加中] ......
on the developmental characteristics study of micropores and microfractures, microtopography damage mechanism was analyzed in the environment of acid leaching. Fractal geometry was applied to describe the evolution rules of surface micropores and microfracture. The results show that the pore fractal dimension and porosity are greatened; fracture information dimension also becomes larger, as leaching time......
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