Results 1 to 10 of about 26,251 (266)

The Spatial Pattern and Mechanism of Thermal Environment in Urban Blocks from the Perspective of Green Space Fractal

open access: yesBuildings, 2023
Land resources in cities are limited, and the cost of green space construction is high. Compared with increasing the amount of green space, maximizing the cooling effect of limited green space has important theoretical and practical significance.
Yilu Gong, Xueming Li, He Liu, Yu Li
doaj   +1 more source

Simulation of stimulated Raman scattering signal generation in scattering tissues excited by Bessel beams

open access: yesJournal of Innovative Optical Health Sciences, 2021
Stimulated Raman scattering (SRS) microscopy has the ability of noninvasive imaging of specific chemical bonds and been increasingly used in biomedicine in recent years.
Xinyu Wang   +7 more
doaj   +1 more source

Preparation of Steel Slag Foam Concrete and Fractal Model for Their Thermal Conductivity

open access: yesFractal and Fractional, 2023
The innovation of structural forms and the increase in the energy-saving requirements of buildings have led to higher requirements regarding the application conditions of steel slag foam concrete (SSFC) to ensure that the SSFC has a lower thermal ...
Guosheng Xiang   +6 more
doaj   +1 more source

Fractal characteristics of pore structures on different coal structures and its research significance

open access: yesMeitan kexue jishu, 2023
The occurrence and production of coalbed methane is related to the development degree of pore system in coal reservoirs. The pore structure characteristics of original structural coal seam will change significantly after damage and deformation, thus ...
Kun ZHANG   +3 more
doaj   +1 more source

Formula for permeability coefficient of coarse-grained soil based on parameters of two-dimensional fractal gradation model

open access: yesYantu gongcheng xuebao, 2023
The coarse-grained soil is widely distributed in nature and used in engineering. The permeability is one of its key properties, and for the same type of coarse-grained soil, its permeability is almost determined by the grain-size distribution and the ...
QU Shizhang 1, LIU Xiaoming 1, LI Li 1, 2, CHEN Renpeng 1, 2
doaj   +1 more source

A Fractal Model of Cracking of Cement Matrix Composites

open access: yesBuildings, 2020
The modern methods of materials (including cement matrix materials) design and testing impose the application of an approach appropriate to materials engineering. A quantitative description of the association between the properties of these materials and
Janusz Konkol
doaj   +1 more source

Normal contact stiffness of fractal rough surfaces

open access: yesArchives of Mechanics, 2014
We used the fractal theory based on a single variable Weierstrass–Mandelbrot function to obtain the normal contact stiffness if rough and smooth isotropic surfaces are pressed against each other. Because in the original fractal theory the distribution of
R. Buczkowski, M. Kleiber, G. Starzynski
doaj   +1 more source

A Modified Model for Identifying the Characteristic Parameters of Machine Joint Interfaces

open access: yesApplied Sciences, 2023
The contact parameters of joint interfaces have a great influence on the dynamic performance of the machine tool, and the dynamic performance determines the machining precision of the machine tool.
Kexian Liu   +4 more
doaj   +1 more source

Modeling of the Loading–Unloading Contact of Two Cylindrical Rough Surfaces with Friction

open access: yesApplied Sciences, 2020
The first fractal model for the loading−unloading process between two cylindrical surfaces with friction is presented. The nonlinear relation between the real contact area and the contact load in different deformation stages are deduced for a load&#
Honghai Wang   +6 more
doaj   +1 more source

An Experimental Study of the Leakage Mechanism in Static Seals

open access: yesApplied Sciences, 2018
This paper investigates the fluidic leak rate through sealing contact surfaces by comparison between model calculation and experiment measurement. The focus is on an experimental device designed to measure the leak rate of the static seals with a simpler
Qiang Zhang   +3 more
doaj   +1 more source

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