Results 231 to 240 of about 19,837,870 (284)
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1973
The discussion of (4.10.8–11) has shown that a temperature gradient in a conductor yields a concentration gradient ▽n with the effect of a diffusion current j = −e D n ▽ r n, where D n is proportional to the electron mobility due to the Einstein relation (4.10.12).
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The discussion of (4.10.8–11) has shown that a temperature gradient in a conductor yields a concentration gradient ▽n with the effect of a diffusion current j = −e D n ▽ r n, where D n is proportional to the electron mobility due to the Einstein relation (4.10.12).
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Semigroups and diffusion processes
Mathematical Proceedings of the Cambridge Philosophical Society, 1987Given a transition function \(p_ t\) associated with a Markov process on \({\mathbb{R}}^ d\), a semigroup S of operators on the bounded Borel measurable functions can be defined via the formula \(S(t)f(x)=\int f(y)p_ t(x,dy)\), \(t>0\). The elliptic differential operator D is the ``generator'' associated with the given Markov process if the equation \[
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On the control of diffusion processes
Journal of Optimization Theory and Applications, 1974This paper considers the control of one-dimensional diffusion processes where one of the boundaries is inaccessible and the other is regular. Costs arise from a rate depending upon the current state and control and also from jumps from the regular boundary.
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Fluctuations in Diffusion Processes in Microgravity
Annals of the New York Academy of Sciences, 2006Abstract: It has been shown recently that diffusion processes exhibit giant nonequilibrium fluctuations (NEFs). That is, the diffusing fronts display corrugations whose length scale ranges from the molecular to the macroscopic one. The amplitude of the NEF diverges following a power law behavior ∝ q−4 (where q is the wave vector).
S. Mazzoni +3 more
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Convergence of diffusion processes
Ukrainian Mathematical Journal, 1992See the review in Zbl 0757.60054.
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Ergodicity of Diffusion Processes [PDF]
, 2017 In this talk, I will discuss ergodic properties of diffusion processes focusing on the rate of convergence of the marginals of the process to the invariant measure with respect to the total variation distance and Wasserstein distance. In particular, I will present sharp conditions in terms of the coefficients of the process (generator) ensuring sub ...
Lazić, Petra, Sandrić, Nikola
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DIFFUSION PROCESSES IN DYED DETECTORS
Nuclear Tracks, 1981ABSTRACT In order to get a better understanding of the dyed and fluorescent track detectors, the diffusion speed of the swelling agent, the sensitization molecules and the dye have been measured under various conditions. It is shown that the sensitization affects the entire detector while dyeing is restricted to the upper and lower layers of the ...
Lferde, M. +4 more
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, 2013
In this paper, we prove that the laws of perturbed diffusion processes and perturbed reflected diffusion processes are absolutely continuous with respect to the Lebesgue measure. The main tool we use is the Malliavin calculus.
Wen Yue, Tusheng Zhang
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In this paper, we prove that the laws of perturbed diffusion processes and perturbed reflected diffusion processes are absolutely continuous with respect to the Lebesgue measure. The main tool we use is the Malliavin calculus.
Wen Yue, Tusheng Zhang
semanticscholar +1 more source
2013
Diffusison is a phenomenon that refers to the spontaneous movement of molecules or particles along a concentration gradient, where a concentration gradient is difference in the concentrations of substances or molecules between two areas. The movement is from a region of higher concentration to a region of lower concentration.
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Diffusison is a phenomenon that refers to the spontaneous movement of molecules or particles along a concentration gradient, where a concentration gradient is difference in the concentrations of substances or molecules between two areas. The movement is from a region of higher concentration to a region of lower concentration.
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On the Convergence of Branching Processes to a Diffusion Process
Theory of Probability & Its Applications, 1986Translation from Teor. Veroyatn. Primen. 30, No.3, 468-477 (Russian) (1985; Zbl 0572.60085).
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