目的探讨检测早产高危孕妇宫颈分泌物中胎儿纤维连结蛋白(fFN),阴道超声检查宫颈长度、宫颈漏斗形成情况预测早产的价值。
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临床产科检查中,通过超声成像测量胎儿各径线长度从而预测胎儿体重是衡量胎儿宫内生长发育的重要指标之一。
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The single chip computer controls frequency and phase of ultrasonic motor by controlling CPLD.
用单片机控制CPLD的两个输入口,从而达到改变超声波电动机输入频率和相位的目的.
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He leaned back in his office chair and sighed as he stroked 3 his beard.
拉比坐在椅子上往后仰,抚摸著他的胡须叹息了一声.
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He leaned back in his office chair and sighed as he stroked his beard.
拉比坐在椅子上往后仰,抚摸着他的胡须叹息了一声.
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Objective To improve and enrich the ultrasonic image data of lesions about lumbar spinal canal.
目的丰富腰椎管区病变的超声诊断影像资料.
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Results: The main acoustic output parameters can be measured in the range of permitted errors.
结果: 能够在误差允许的范围内测量出主要的声输出参数.
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声散射问题的研究一般建立在入射波为平面波的基础上.
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现在是太阳活动峰期所以可以预期某些太阳活动,而且他们已经为太空垃圾的声明打好了底子。
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