Results 31 to 40 of about 248,487 (165)
Frontiers in Materials, 2022 In this work, we propose an efficient numerical method to study the effects of microstructures on the effective diffusion coefficient of the diffusion component in materials. We take the diffusion of hydrogen (H) atoms in porous polycrystalline tungsten (
Bingchen Li +13 more
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Low-Complexity Numerical Approach for the Diffusion Equation with Variable Diffusion Coefficient
MathematicsThe diffusion equation models a wide variety of physical and chemical processes and has significant interest in many scientific disciplines. Analytical and numerical methods found in the literature for solving the diffusion equation consider a constant ...
Marta Zárraga-Rodríguez +2 more
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Diffusion Tests for Chloride in Concrete Using Wind Tunnel Test
MATEC Web of Conferences, 2017 Diffusion coefficient of chloride in concrete is a predominant factor in chloride penetration into concrete. Two types of diffusion coefficient models are examined here: mean diffusion coefficient D, time-dependent diffusion coefficient D(t).
Nuralinah Devi, Shimomura Takumi
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Radiology Case Reports, 2022 The hemostatic effect of radiation therapy on gastric cancer with bleeding is known. However, blood tests and endoscopes are mainly used to determine the therapeutic effect.
Osamu Tanaka, MD +7 more
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New insights into natural gas diffusion coefficient in rocks
Petroleum Exploration and Development, 2012 Based on the analysis of measuring methods and results of natural gas diffusion coefficient in rocks and the measurement of methane diffusion coefficient in the Upper Paleozoic rocks of the Ordos basin, this paper clarifies the meaning of natural gas ...
Guangdi LIU +5 more
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Testing the Diffusion Coefficient [PDF]
, 2002 In mathematical finance diffusion models are widely used and a variety of different parametric models for the drift and diffusion coefficient coexist in the literature. Since derivative prices depend on the particular parametric model of the diffusion coefficient function of the underlying, a misspecification of this function leads to misspecified ...
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Time-varying diffusion characteristics of different gases in coal particles
International Journal of Mining Science and Technology, 2017 Based on the analytical solution of gas diffusion in spherical coal particles with a constant diffusion coefficient, a calculation method of time-varying diffusion coefficient is proposed by constructing objective function.
Qingming Long, Qianting Hu, Bo Cheng
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Diagnostic and Interventional Radiology, 2015 PURPOSEWe aimed to evaluate the apparent diffusion coefficient (ADC) values of metastatic lymph nodes in patients with squamous cell carcinoma (SCC) of the head and neck.METHODSPatients with metastatic lymph nodes underwent 1.5 Tesla diffusion-weighted ...
Yeliz Pekçevik +2 more
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Nanomaterials, 2022 To systematically investigate the diffusion behavior of Fe/Cu bimetallic materials and the influence of the Ni element on the diffusion and mechanical properties of the Fe/Cu bimetallic interface, the diffusion distance, diffusion coefficient, and strain–
Guowei Zhang +4 more
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Sorption measurements of autoclaved aerated concretes diffusion coefficient
E3S Web of Conferences, 2018 This study presents the results of sorption measurements and analyzes their applicability in the determination of the moisture diffusion coefficient in the porous media in which these processes occur. The test involved three classes of autoclaved aerated
Garbalińska Halina, Bochenek Magdalena
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