A step towards holistic discretisation of stochastic partial differential equations
A step towards holistic discretisation of stochastic partial differential equations
复制标题
随机偏微分方程整体离散化的一步
DOI:
10.21914/anziamj.v45i0.869
复制
发表时间:
2003
期刊:
影响因子:
0.9
通讯作者:
A. Roberts
中科院分区:
文献类型:
--
作者:
A. Roberts
The long term aim is to use modern dynamical systems theory to derive discretisations of noisy, dissipative partial differential equations. As a first step we here consider a small domain and apply stochastic centre manifold techniques to derive a model. The approach automatically parametrises the subgrid scale processes induced by spatially distributed stochastic noise. It is important to discretise stochastic partial differential equations carefully, as we do here, because of the sometimes subtle effects of noise processes. In particular we see how stochastic resonance effectively extracts new noise processes for the model which in this example helps stabilise the zero solution.