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2019
Market prices of financial assets often show jumps caused by unpredictable events or news. The market closing-opening is also a source of price jumps. The pure Brownian motion based diffusion models do not admit large asset price move in a short period of time. Adding jumps to diffusion can show skewed distributions with fat tail which are difficult to
Raymond H. Chan +3 more
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Market prices of financial assets often show jumps caused by unpredictable events or news. The market closing-opening is also a source of price jumps. The pure Brownian motion based diffusion models do not admit large asset price move in a short period of time. Adding jumps to diffusion can show skewed distributions with fat tail which are difficult to
Raymond H. Chan +3 more
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2017
In 1950, van Roosbroeck introduced the fundamental semiconductor device equations as a system of three nonlinearly coupled partial differential equations (PDEs). They describe the semiclassical transport of free electrons and holes in a self-consistent electric field using a drift-diffusion approximation.
Farrell P. +5 more
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In 1950, van Roosbroeck introduced the fundamental semiconductor device equations as a system of three nonlinearly coupled partial differential equations (PDEs). They describe the semiclassical transport of free electrons and holes in a self-consistent electric field using a drift-diffusion approximation.
Farrell P. +5 more
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Journal of Colloid and Interface Science, 2009
This work presents a simple solution for the diffuse double layer model, applicable to calculation of surface speciation as well as to simulation of ionic adsorption within the diffuse layer of solution in arbitrary salt media. Based on Poisson-Boltzmann equation, the Gaines-Thomas selectivity coefficient for uni-bivalent exchange on clay, K(GT)(Me(2+)/
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This work presents a simple solution for the diffuse double layer model, applicable to calculation of surface speciation as well as to simulation of ionic adsorption within the diffuse layer of solution in arbitrary salt media. Based on Poisson-Boltzmann equation, the Gaines-Thomas selectivity coefficient for uni-bivalent exchange on clay, K(GT)(Me(2+)/
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Operations Research, 1960
In attempting to investigate the attrition of a large target complex (raid) caused by attacking manned or unmanned interceptors, the analogy to the diffusion of electrons or neutrons in suitable media, or similarly, radiation transport in a stellar atmosphere, suggests itself.
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In attempting to investigate the attrition of a large target complex (raid) caused by attacking manned or unmanned interceptors, the analogy to the diffusion of electrons or neutrons in suitable media, or similarly, radiation transport in a stellar atmosphere, suggests itself.
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Nonlocal Turbulent Diffusion Models
Journal of Mathematical Sciences, 2021zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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MODELING DIFFUSION AND REACTION IN SOILS: IV. NEW MODELS FOR PREDICTING ION DIFFUSIVITY
Soil Science, 1996Salt diffusivity as a function of soil-water content and soil-water characteristic curves was measured on three sieved soils of different texture. The data were used together with ion diffusivity data for sieved soils from literature to test different diffusivity models.
Olesen, T. +3 more
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Models of technology diffusion
Research Policy, 2000Abstract The literature on new technology diffusion is vast, and it spills over many conventional disciplinary boundaries. This paper surveys the literature by focusing on alternative explanations of the dominant stylized fact: that the usage of new technologies over time typically follows an S-curve.
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2023
Innovation diffusion models are statistical models that predict the medium- and long-term sales performance of new products on a market. They account for numerous factors that contribute to the life cycle of a new product and are subject to continuous reassessment as markets transform and the business world becomes more complex.
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Innovation diffusion models are statistical models that predict the medium- and long-term sales performance of new products on a market. They account for numerous factors that contribute to the life cycle of a new product and are subject to continuous reassessment as markets transform and the business world becomes more complex.
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Diffusion Models with Microstructure
Transport in Porous Media, 1991Models of diffusion are presented which recognize the local geometry of individual cells or storage sites and the exchange of flux on the micro-scale of these cells. Such models have been obtained by homogenization, but here we indicate stronger existence-uniqueness results of “parabolic” type can be obtained directly.
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