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- W4385227154 abstract "Sequential Monte Carlo squared (SMC$^2$; Chopin et al., 2012) methods can be used to sample from the exact posterior distribution of intractable likelihood state space models. These methods are the SMC analogue to particle Markov chain Monte Carlo (MCMC; Andrieu et al., 2010) and rely on particle MCMC kernels to mutate the particles at each iteration. Two options for the particle MCMC kernels are particle marginal Metropolis-Hastings (PMMH) and particle Gibbs (PG). We introduce a method to adaptively select the particle MCMC kernel at each iteration of SMC$^2$, with a particular focus on switching between a PMMH and PG kernel. The resulting method can significantly improve the efficiency of SMC$^2$ compared to using a fixed particle MCMC kernel throughout the algorithm. Code for our methods is available at https://github.com/imkebotha/kernel_switching_smc2." @default.
- W4385227154 created "2023-07-25" @default.
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- W4385227154 date "2023-07-21" @default.
- W4385227154 modified "2023-09-26" @default.
- W4385227154 title "Adaptively switching between a particle marginal Metropolis-Hastings and a particle Gibbs kernel in SMC$^2$" @default.
- W4385227154 doi "https://doi.org/10.48550/arxiv.2307.11553" @default.
- W4385227154 hasPublicationYear "2023" @default.
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