The tracking method of pure orientation target was based on error pretreatment, and adopted polynomial segmentation fitting to measure.

基于误差预处理技术的纯方位目标跟踪方法，采用多项式分段拟合测量。

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The feature of symmetric canonical form and the relation between the LU polynomial invariants and SLOCC classification in pure three-qubit case are presented at first.

首先介绍了三量子比特纯态情形对称正则形式的特点和LU多项式不变量与随机LOCC分类的关系。

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