Parameter | Description |

$\theta $ | Rotation angle, $0\le \theta \le 2\pi $ |

${k}_{max}$ | Maximum iteration number. |

r | Convergence rate of distance between a point and the origin, $0\le r\le 1$ |

${R}_{i,j}$ | Rotation matrix between xi ? xj planes |

m | Dimension of the search space |