Many complex dynamical phenomena can be effectively modeled by a system that
switches among a set of conditionally linear dynamical modes. We consider two
such models: the switching linear dynamical system (SLDS) and the switching
vector autoregressive (VAR) process. Our Bayesian nonparametric approach
utilizes a hierarchical Dirichlet process prior to learn an unknown number of
persistent, smooth dynamical modes. We additionally employ automatic relevance
determination to infer a sparse set of dynamic dependencies allowing us to
learn SLDS with varying state dimension or switching VAR processes with varying
autoregressive order. We develop a sampling algorithm that combines a truncated
approximation to the Dirichlet process with efficient joint sampling of the
mode and state sequences. The utility and flexibility of our model are
demonstrated on synthetic data, sequences of dancing honey bees, the IBOVESPA
stock index, and a maneuvering target tracking application.

使用贝叶斯非参数方法，将层次狄利克雷过程先验应用于两种切换动态模型，学习未知的持续光滑动态模式，同时推断动态依赖性的稀疏集，以学习具有变化状态维数的切换线性动态系统或具有变化自回归顺序的切换 VAR 过程，最终通过舞蹈蜜蜂序列、IBOVESPA 股票指数和机动目标跟踪应用程序展示模型的效用和灵活性