Diffusion is shown to occur within regions rather than within empires or the world system as a whole.DAVID STRANGUniversity of IowaSociological Methods & ResearchStrang D (1991) Adding social structure to diffusion models: an event history framework. Sociol Methods Res 19:324-353...
摘要: We consider Bayesian hierarchical models for event history analysis, where the event timesare modeled through an underlying diffusion process, which determines the hazard rate. Weshow how these models can be e±ciently treated by means of Markov chain Monte Carlotechniques....
History of the Lenz-Ising Model It is shown that the probability distribution of spin patterns in the Lenz鈥揑sing model may be represented mathematically by a two parameter Markov proces... BRUSH,STEPHEN 被引量: 0发表: 1967年 A virtual environment for the exploration of diffusion and flow ph...
Baranzelli, M. C., Cosacov, A., Ferreiro, G., Johnson, L. A. & Sérsic, A. N. Travelling to the south: Phylogeographic spatial diffusion model inMonttea aphylla(Plantaginaceae), an endemic plant of the Monte Desert.PLoS ONE12(6), e0178827.https://doi.org/10.1371/journal.pone.01...
We introduce an inference method based on the joint frequency spectrum of genetic variants within and between populations. For candidate models we numerically compute the expected spectrum using a diffusion approximation to the one-locus, two-allele Wright-Fisher process, involving up to three ...
Previous studies on the natural history of long-COVID have been few and selective. Without comparison groups, disease progression cannot be differentiated from symptoms originating from other causes. The Long-COVID in Scotland Study (Long-CISS) is a Scot
models better than the state-of-the-art models today. Also, the financial benefits are not as clear as other ML research like the GPT-3 or the Stable Diffusion. Big companies are not likely to devote huge amounts of resources to it. Therefore, my answer is: It is not achievable any ...
Diffusion of erucamide and their morphology on surface characteristics of high‐density polyethylene (HDPE) screw caps depend on storage conditions. Erucam... N Dulal,R Shanks,D Chalmers,... - 《Journal of Applied Polymer Science》 被引量: 0发表: 2018年 FLUID-IMPARTING BOTTLE FOR LARGE BORE ...
Based on the explicit Euler method described in Example 5.4 for the one-dimensional transient diffusion equation with a time-step size of Δt = 1/100,000 and a grid-step size of Δx = 1/100, discuss the aspect of convergence for the numerical solution attained with identical initial and ...