Modelling uncertainties in phase-space boundary integral models of ray propagation
Modelling uncertainties in phase-space boundary integral models of ray propagation
复制标题
射线传播相空间边界积分模型的不确定性建模
DOI:
10.1016/j.cnsns.2019.104973
复制
发表时间:
2020
影响因子:
3.9
通讯作者:
Bajars J
中科院分区:
文献类型:
--
作者:
Bajars J
A recently proposed phase-space boundary integral model for the stochastic propagation of ray densities is presented and, for the first time, explicit connections between this model and parametric uncertainties arising in the underlying physical model are derived. In particular, an asymptotic analysis for a weak noise perturbation of the propagation speed is used to derive expressions for the probability distribution of the phase-space boundary coordinates after transport along uncertain, and in general curved, ray trajectories. Furthermore, models are presented for incorporating geometric uncertainties in terms of both the location of an edge within a polygonal domain, as well as small scale geometric fluctuations giving rise to rough boundary reflections. Uncertain source terms are also considered in the form of stochastically distributed point sources and uncertain boundary data. A series of numerical experiments is then performed to illustrate these uncertainty models in two-dimensional convex polygonal domains.
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DOI:
--
发表时间:
1999
期刊:
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
影响因子:
--
作者:
P. Cvitanović;N. Søndergaard;G. Palla;G. Vattay;C. Dettmann
通讯作者:
C. Dettmann
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
Y. Sinai
通讯作者:
Y. Sinai
影响因子:
2.4
作者:
J. Koskela;E. Vahala;M. de Greef;L. Lafitte;M. Ries
通讯作者:
M. Ries
影响因子:
2.4
作者:
Chappell D
通讯作者:
Chappell D
影响因子:
4.1
作者:
Bajars J
通讯作者:
Bajars J