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arXiv 1010.4447math.PR
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扩散过程的重要性抽样模拟

Simulation of diffusions by means of importance sampling paradigm

Madalina Deaconu, Antoine Lejay

摘要:

本文的目的是介绍一种新的蒙特卡罗方法的基础上的重要抽样技术的模拟随机微分方程。其主要思想是将正方形或矩形上的随机游动方法与重要抽样技术相结合。这种方法的第一个优点是可以很容易地从一维布朗运动的密度计算权重。与欧拉格式相比,当需要考虑复杂的边界条件时,该方法可以获得更精确的扩散近似。该方法也提供了一个有趣的替代执行方差减少技术和模拟罕见的事件。

英文摘要:

The aim of this paper is to introduce a new Monte Carlo method based on importance sampling techniques for the simulation of stochastic differential equations. The main idea is to combine random walk on squares or rectangles methods with importance sampling techniques. The first interest of this approach is that the weights can be easily computed from the density of the one-dimensional Brownian motion. Compared to the Euler scheme this method allows one to obtain a more accurate approximation of diffusions when one has to consider complex boundary conditions. The method provides also an interesting alternative to performing variance reduction techniques and simulating rare events.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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