前向事件链蒙特卡罗:不可逆马尔可夫链中随机控制的快速采样
Forward Event-Chain Monte Carlo: Fast sampling by randomness control in irreversible Markov chains
摘要:
不可逆和无拒绝蒙特卡罗方法,最近在物理学中以事件链的名义开发,在统计学中称为分段确定性蒙特卡罗(PDMC),已被证明比标准蒙特卡罗方法产生明显的加速,这要归功于它们的随机游走行为的减少。然而,当将这样的方案应用于标准统计模型时,为了正确性,通常需要引入额外的随机化。我们在这里提出了一类新的事件链蒙特卡罗方法,减少这种额外的随机化到最低限度。我们比较了这种新方法的效率,标准的PDMC和蒙特卡罗方法。加速到几个数量级和减少尺寸缩放展出。
英文摘要:
Irreversible and rejection-free Monte Carlo methods, recently developed in Physics under the name Event-Chain and known in Statistics as Piecewise Deterministic Monte Carlo (PDMC), have proven to produce clear acceleration over standard Monte Carlo methods, thanks to the reduction of their random-walk behavior. However, while applying such schemes to standard statistical models, one generally needs to introduce an additional randomization for sake of correctness. We propose here a new class of Event-Chain Monte Carlo methods that reduces this extra-randomization to a bare minimum. We compare the efficiency of this new methodology to standard PDMC and Monte Carlo methods. Accelerations up to several magnitudes and reduced dimensional scalings are exhibited.
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