Further theoretical analysis indicates that there is a conversation law only when unitary transformation symmetry group exist.
进一步的理论分析表明，只有存在一个幺正变换对称群时，才有一个守恒定律。
Perturbation analysis of the canonical subspaces: This paper gives the least perturbation bound of the unitary factor on the unitary decomposition.
标准子空间的扰动分析：本文给出了矩阵的酉分解中酉因子的最小扰动界。
The analysis requirement that the traditional virtual spectrum analyzer which has unitary function and expensive price and has not flexible use can not already satisfy modern test signal.
传统的频谱分析仪功能单一、价格昂贵、使用不灵活，已不能满足现代测试信号的分析要求。
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