Parameter/variable | Definition |

DP (α, H) | random probability density function coming from the Dirichlet distribution with parameters α and H |

H | represents the base distribution |

α | concentration parameter |

G | the random distribution drawn from the Dirichlet process DP (α, H) |

| the parameter of G distribution which follows a stick-breaking process (SBP) |

| is the regression parameters |

| is the vector of predictors |

| is the variance in the model |

N | the Gaussian distribution |

S | is the speed observation |

| is the mixing proportion |

| represent a Dirac delta function concentrated at |

k | represents the number of mixture components. |