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Ultrasonic attenuation capacity of cellular Al alloy foam were studied.

研究了闭孔泡沫铝合金孔结构参数对其超声衰减性能的影响.

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Objective : To study the diagnostic role of broadband ultrasonic attenuation ( BUA ) in measurement of bone mineral density.

目的: 探讨跟骨宽带超声衰减诊断骨质疏松的临床价值.

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The result showed that there is a turn point on the ultrasonic attenuation curve.

试验结果表明,豆乳在凝固超声衰减曲线上有一明显转折点即凝固初始点.

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Because of ultrasonic attenuation in organism is proportional to frequency, 2 MHz ultrasonic distance and receiving sensitivity.

超声波在生物体中的衰减与频率成正比, 使用2MHz超声换能器由于衰减大致使穿透深度小、接收灵敏度低、仪器综合灵敏度难以提高.

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