本文用相点的惯量矩来描述相轨迹在相空间中展开的程度,用相点的惯量矩的相对变化来描述相轨迹展开的快慢.导出了相点关于主对角线的、与重构参数有关的惯量矩公式.用该公式计算了相点的惯量矩的相对变化,选出了不同维数的延迟时间.从非零延迟时间中选出的最小维数就是嵌入维数,该非零延迟时间就是最终确定的延迟量.用此方法获得的参数重构出的相轨迹质量较好,且具有抗噪能力强.

The expanding degree of a Trajectory of phase is described by moment of inertia of phase dots, the change speed that a Trajectory of phase follow delay time is described by the relatively change of moment of inertia of phase dots. The formula of moment of inertia is educed about primary diagonal,the expression relate to reconstruction parameters. the relatively changes of moment of inertia are computed by the formula,the delay times of different dimension are determined by the curve of the relatively changes of moment of inertia. thereinto first nonzero delay time is needful, Corresponding to dimension is embedding dimension, fidelity of reconstructed Trajectory is better by the parameters, also antinoise ability is better.