Results 11 to 20 of about 26,251 (266)

Fractal model of anomalous diffusion. [PDF]

open access: yesEur Biophys J, 2015
An equation of motion is derived from fractal analysis of the Brownian particle trajectory in which the asymptotic fractal dimension of the trajectory has a required value. The formula makes it possible to calculate the time dependence of the mean square displacement for both short and long periods when the molecule diffuses anomalously.
Gmachowski L.
europepmc   +4 more sources

Fractal properties of rain, and a fractal model [PDF]

open access: yesTellus A: Dynamic Meteorology and Oceanography, 1985
Este documento amplía las teorías y observaciones anteriores de los autores, avanza un modelo probabilístico de los campos de lluvia y exhibe simulaciones realistas, que se recomienda al lector que escanee antes de continuar con el texto. El modelo también se compara con otros enfoques. La teoría de los fractales ha sido motivada en parte por el efecto
S. Lovejoy, Benoît B. Mandelbrot
openaire   +1 more source

Fractals and Solid Modeling [PDF]

open access: yesComputer Graphics Forum, 1992
AbstractTrying to combine fractal geometry and solid modeling seems to be a contradiction in itself, In this paper a new type of 3D objects is presented that accomplishes this combination in a specific way. Objects with a fractal macro structure and a 3D solid micro structure can be specified and rendered efficiently by using context free, attribute ...
openaire   +1 more source

Fractal Modeling and Fractal Dimension Description of Urban Morphology [PDF]

open access: yesEntropy, 2020
The conventional mathematical methods are based on characteristic length, while urban form has no characteristic length in many aspects. Urban area is a scale-dependence measure, which indicates the scale-free distribution of urban patterns. Thus, the urban description based on characteristic lengths should be replaced by urban characterization based ...
openaire   +4 more sources

Modeling water movement in horizontal columns using fractal theory Modelagem de movimento horizontal de água no solo utilizando a teoria dos fractais

open access: yesRevista Brasileira de Ciência do Solo, 2010
Fractal mathematics has been used to characterize water and solute transport in porous media and also to characterize and simulate porous media properties.
Tairone Paiva Leão, Edmund Perfect
doaj   +1 more source

Research on a Fractal Dimension Calculation Method for a Nano-Polymer Microspheres Dispersed System

open access: yesFrontiers in Chemistry, 2021
Polymer microspheres (PMs) are a kind of self-similar volume expansion particle, and their fractal dimension varies with hydration swelling. However, there is no unique fractal dimension calculation method for their characteristics.
Wenyue Zhao   +6 more
doaj   +1 more source

Calculation and Analysis of the Electrical Contact Resistance of the Strap Contacts Used in GIS Equipment Based on the Fractal Model

open access: yes工程科学与技术, 2023
Contact resistance of an electrical connection structure (ECR) is an important indicator to evaluate the reliability of the electrical contact system. The strap contact is an important electrical connection component in eco-friendly insulating gas GIS ...
Wei YANG   +4 more
doaj  

Characterization of pore structure and reservoir properties of tight sandstone with CTS, SEM, and HPMI: A case study of the tight oil reservoir in fuyu oil layers of Sanzhao Sag, Songliao basin, NE China

open access: yesFrontiers in Energy Research, 2023
Quantitative characterization of the pore throat structures and reservoir properties of the tight sandstone in Fuyu oil layers of Sanzhao Sag, Songliao Basin, NE China was carried out using cast thin section (CTS), scanning electron microscopy (SEM) and ...
Changhe Mu, Haojie Hua, Xiukun Wang
doaj   +1 more source

Different Soil Particle-Size Classification Systems for Calculating Volume Fractal Dimension—A Case Study of Pinus sylvestris var. Mongolica in Mu Us Sandy Land, China

open access: yesApplied Sciences, 2018
Characterizing changes in the soil particle-size distributions (PSD) are a major issue in environmental research because it has a great impact on soil properties, soil management, and desertification. To date, the use of soil volume fractal dimension (D)
Jifeng Deng, Chengzhong Ma, Hongzhou Yu
doaj   +1 more source

Simulation of Full-Scale Rockfall Tests with a Fragmentation Model

open access: yesGeosciences, 2020
In this paper, we present the upgraded version of RockGIS, a stochastic program for the numerical simulation of rockfalls and their fragmentation, based on a fractal model.
Gerard Matas   +5 more
doaj   +1 more source

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