Acoustic velocities of tap water and polymer solution were studied using ultrasonic-pulse reflection method in the laboratory. Polymer density and apparent viscosity were measured.

采用脉冲反射法在实验室条件下对自来水和不同浓度聚合物溶液的声速进行了测量研究，经测量得到了聚合物溶液的密度、表观粘度。

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As a result, this method offers much better reflection coefficients than ordinary segmental pulse deconvolution does.

因此，此法要比普通分段脉冲反褶积求解反射系数的精度高得多。

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The automatic testing method of cable fault is characterized by that the pulse signal transmitted and received by pulse reflection test circuit can be directly superposed on the output end of d.

电缆故障的自动测试方法，其特征在于是将脉冲反射测试电路发射与接收的脉冲信号直接叠加到直流高压测量电路的输出端，直流高压测量电路的输出端与被测电缆端口连接。

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