理论上给出了算法的流大小的无偏估计，相对误差的上界以及时间和空间复杂度。
Unbiased estimation of flow size, the upper bound of relative error and the time and space complexity are deduced theoretically.
利用逆散射理论，通过测量离体血管的声散射场振幅谱的大小周期，重构了猪的主动脉离体血管的内外半径，重构参数的相对误差<4%。
Inverse scattering theory was applied to reconstruct the inside and outside radii of the aortic blood vessels of a pig by scattering spectrum. The relative errors of reconstruction were less than 4%.
从测量的误差理论出发、分析得出了一般情况下，被测量最小值的估算方法：当被测量的相对误差为10 0 %时，此时的被测量的大小就是可探测量的最小值。
According to error theory, the estimating method of detectable minimum quantity is obtained: when the relative error is 100%, the quantity is the detectable minimum one.
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