نتایج جستجو برای: fractal dimension

تعداد نتایج: 133816  

2014
Nazneen Akhter Yogesh Rajput K. V. Kale Ramesh Manza

Arterial pattern and morphology of distribution is damaged because of diabetes resulting in retinal vasculature deformation. This aspect is studied in terms of quantification of the degree of complexity associated with the distribution of blood vessels in eye for healthy and diabetic humans. Retina images of fifteen healthy subjects are compared with those of diabetic subjects. It is found that...

Journal: :تحقیقات آب و خاک ایران 0
لیلا اسماعیل نژاد دانشجوی دکتری گروه علوم خاک دانشگاه تهران جواد سیدمحمدی دانشجوی دکتری، گروه علوم خاک دانشگاه تبریز محمود شعبانپور دانشیار گروه علوم خاک دانشگاه گیلان حسن رمضان پور دانشیار، گروه علوم خاک دانشگاه گیلان

cation exchange capacity and specific surface area are among some of the important soil characteristics the direct measurement of which is laborious, costly and time consuming. therefore, fractal dimension of particle size distribution has been widely studied in relation with many such dynamic and static processes as transmission of water and solutes, water holding capacity, heat storage and co...

ژورنال: علوم آب و خاک 2017

Treated wastewater may influence soil structure, porosity and as a consequence, soil saturated hydraulic conductivity. This study aims to assess the effect of wastewater on saturated hydraulic conductivity; and to determine the suitable soil solids fractal dimension to incorporate into the pedotransfer function by Rawls et al (1993) for estimation of saturated hydraulic conductivity (Ks). Soi...

Introduction: One of the fractal analysis methods to examine the structure of a texture is fractal dimension (F.D.) measurement. F.D is a quantitative method to show the complexity of a structure using a number. The aim of this study was to determine the effect of different exposure conditions, voltages and angle of x-ray tube on F.D. values of mandibular bone. Methods: This lab-trial analytic...

Journal: :International Journal of Medical Sciences 2004
Tim L. A. Doyle Eric L. Dugan Brendan Humphries Robert U. Newton

The aim of this project was to evaluate the use of a new analysis technique, fractal dimension analysis, for quantification of quiet stance centre of pressure (COP). By using a fractal dimension analysis of COP, it might be possible to gain more information about control during quiet stance than traditional analyses have previously allowed. The current project considered a group of young health...

2002
D. Datta

Characterization of a digitized image is often required in nondestructive evaluation. Apart from the existing image processing techniques, a recent method to analyze and quantify complex images has been developed based on the fractal theory. As reported, it is possible to get salient information from any digitized image by evaluating the fractal dimension, the defining characteristic of a fract...

2002
Dominique Thiebaut

This work extends a model proposed by Voldman, Mandelbrot, et al. on the fractal nature of the gaps separating cache misses, and shows how the fractal dimension of the gap distribution can be used to predict the miss ratio experienced by the program that has generated the series of cache misses. This result supports the thesis that the fractal dimension of the distribution of the intermiss gaps...

2012
F. Nicolleau T. M. Michelitsch A. F. Nowakowski

The dispersion of heavy particles line in an isotropic and incompressible three-dimensional turbulent flow has been studied using the Kinematic Simulation techniques to find out the evolution of the line fractal dimension. In this study, the fractal dimension of the line is found for different cases of heavy particles inertia (different Stokes numbers) in the absence of the particle gravity wit...

2000
Ingo Dierking

Fractal growth patterns can be observed during the formation of the liquid crystalline B2 phase of a bent-core molecule from the isotropic melt. The time development of the box dimension Db, the information dimension Di and the mass dimension Dm was determined during the phase ordering process, as the cell gap, quench depth and quench rate was varied. The fractal dimensions obtained for various...

2008
Néstor Sánchez Emilio J. Alfaro Enrique Pérez

The interstellar medium seems to have an underlying fractal structure which can be characterized through its fractal dimension. However, interstellar clouds are observed as projected two-dimensional images, and the projection of a tridimensional fractal distorts its measured properties. Here we use simulated fractal clouds to study the relationship between the tri-dimensional fractal dimension ...

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