Results 31 to 40 of about 663,725 (292)
Polarized Helium to Image the Lung [PDF]
, 2005 The main findings of the european PHIL project (Polarised Helium to Image the Lung) are reported. State of the art optical pumping techniques for polarising ^3He gas are described. MRI methodological improvements allow dynamical ventilation images with a
Leduc, Michèle, Nacher, Pierre-Jean
core +4 more sources
Molecular Simulation of Coal Molecular Diffusion Properties in Chicheng Coal Mine
Molecules, 2023 In order to study the importance of the diffusion mechanism of CH4 and CO2 in coal for the development of coalbed methane, the aim of this paper is to reveal the influence mechanism of pressure, temperature, water content and other factors on the ...
Jingxue Yan +3 more
doaj +1 more source
Gas Diffusion Method Using Methane as Processing Gas
Journal of IsotopesThis study is based on gas diffusion method，using methane as processing gas to explore the production technology route of high abundance carbon-13 isotopes.
Fei WANG +3 more
doaj +1 more source
Meikuang Anquan, 2023 Gas adsorption experiment with coal particles is a basic means to study the gas flow mechanism of coal matrix. In order to explore the influence of coal particle shape on coal gas adsorption law, a constant temperature and pressure adsorption experiment ...
GAO Yu, LIU Jia, QIN Yueping
doaj +1 more source
Bayesian estimation for selective trace gas detection
, 2008 We present a Bayesian estimation analysis for a particular trace gas detection technique with species separation provided by differential diffusion. The proposed method collects a sample containing multiple gas species into a common volume, and then ...
A. K. Tuchman +9 more
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Nonequilibrium transport equations and ab initio study of adsorption processes on carbon nanotubes [PDF]
, 2014 In a theoretical study of gas adsorption on carbon nanotubes (CNT) nonequilibrium processes of ionization, polarization, surface diffusion and desorption of atoms are considered self-consistently.
Jurga, S. +2 more
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Self-diffusion in granular gases: Green-Kubo versus Chapman-Enskog
, 2005 We study the diffusion of tracers (self-diffusion) in a homogeneously cooling gas of dissipative particles, using the Green-Kubo relation and the Chapman-Enskog approach. The dissipative particle collisions are described by the coefficient of restitution
Abramowitz M., Ben-Naim E., Resibois P.
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Research on Production of 15N Isotope with N2 by Gas Diffusion Method
Yuanzineng kexue jishuThere are two natural stable isotopes of nitrogen, 14N and 15N, with isotopic abundances of 99.636% and 0.364%. 15N is widely used in research and analysis in atmospheric tracing, agricultural and forestry research, and origin tracing.
HAN Yilun, ZHOU Mingsheng, WANG Fei
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Stochastic simulation of catalytic surface reactions in the fast diffusion limit [PDF]
, 2006 The master equation of a lattice gas reaction tracks the probability of visiting all spatial configurations. The large number of unique spatial configurations on a lattice renders master equation simulations infeasible for even small lattices.
Haseltine, Eric L. +2 more
core +1 more source
Energies, 2020 The diffusion–adsorption behavior of methane in coal is an important factor that both affecting the decay rate of gas production and the total gas production capacity.
Zhigao Peng +4 more
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