The results of experiments show that there are obvious linearity relationship between the attenuation of ultrasonic and the concentration of high water based fluid in some ranges.
实验结果表明：超声波在高水基流体介质中的衰减与一定范围的介质浓度存在较好的线性关系。
Conclusion: The variation of bilirubin concentration versus plasma exchange dosage follows an exponentially attenuation law.
结论：胆红素浓度随血浆置换量的变化成指数衰减规律。
The estimated ultraviolet radiation attenuation coefficient and DOC concentration all existed markedly positive relationship; but UV-B wave band was higher than UV-A wave band.
估算得到的紫外辐射衰减系数与DOC浓度均存在显著性正相关，但UV - B波段要高于UV - A波段。
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