That is done using ultrasound, which is generated by a box called a pulse-generator that is similar in size to a pacemaker box, but is inserted lower down in the chest (see illustration).
这个问题可以通过使用超声波来解决，也就是利用一个大小和心脏起搏器差不多，名为“脉冲发生器”的盒子来完成，但是它需要被放在胸腔下部(如上图所示)。
Aiming at the technology demand of advanced copper interconnection, the effect of pulse current density on cu layer properties such as resistance, crystal size and surface roughness were investigated.
针对先进纳米铜互连技术的要求，研究了脉冲电流密度对铜互连线电阻率、晶粒尺寸和表面粗糙度等性能的影响。
Then the amplitude threshold is established combined with detection probability. The method of ascertaining pulse number threshold is analyzed according to orientation requirement and target size.
在此基础上，结合探测概率制定幅度门限，根据定位要求及目标尺寸，分析了脉冲个数门限的确定方法。
Simulation results show that the size of the focal spot increases with the number of color cycles and the basic pulse bandwidth in the dispersing direction.
模拟结果表明，焦斑尺寸随色循环数和光栅色散方向上基准脉冲带宽的增加而增大。
The peak current and pulse duration of single pulse determine the size and depth of discharge crater, so they determine the machining surface roughness and size and shape accuracy.
放电单脉冲的电流峰值和脉宽决定了单个电火花蚀坑的大小和深度，从而直接决定了工件的加工表面粗糙度、形状精度和尺寸精度。
Effects of pulsed laser parameters such as laser wavelength, beam spot size, pulse energy and pulse duration on threshold energy in laser simulating Single Event Effect testing are analyzed.
分析了在激光模拟单粒子效应试验中激光波长、束斑大小、脉冲能量、脉冲宽度等脉冲激光参数对阈值能量的影响。
The pulse frequency was not printed, it is estimated from the size of the coils and transformer that the frequency doesn't exceed 50 Mhz. Don't depend on this being fact, it's just a educated guess.
脉冲频率不能打印，估计从变压器线圈的大小和频率不超过50兆赫。不要依赖于这个被事实上，这只是一个猜测。
BP algorithmic model was established for the artificial neural network of the grain size of Al-alloy's solidification structure under the action of strong pulse electromagnetic field.
建立了强脉冲电磁场作用下铝合金凝固组织晶粒尺寸的人工神经网络BP算法模型。
The relation of the disturbance voltage induced by the pulse magnetic field and the properties and size of the material is also discussed in this paper.
本文还讨论了脉冲磁场的感应电压大小与材料的性质和尺寸的关系。
The ceramic technology by Pulse allows for extremely small antenna size without compromising rf performance.
陶瓷技术允许极其微小脉冲天线尺寸的前提下射频性能。
Under the different laser parameters, the electron energy gain depends on the laser intensity, focal spot size and pulse width.
不同激光参鼍条件下，得到了电子的能量增益与激光强度、焦斑大小和脉冲宽度关系。
Based on the technology of rotating impeller DE gassing in aluminum alloy melt, the effect of pulse gas current on the gas bubble size by studied with the water modeling method.
在铝合金熔体净化旋转喷吹技术的基础上，采用水力模拟实验研究了脉冲进气方式对气泡大小的影响。
In order to meet the need of family community, this subject is to design a portable non-invasive pulse oximetry, the system has advantages of small size, light weight.
本课题旨在设计一种适用于家庭保健和社区医疗的便携式无创脉搏血氧饱和度测量仪，这个系统具有尺寸小，重量轻的特点。
We studied the relationship between the films thickness, grain size and deposition parameters, i. e. pulse laser frequency, striking voltage and distance from the target to the substrate.
研究了所制备薄膜的厚度、颗粒度等与薄膜制备过程中激光脉冲频率、引弧电压和靶材—衬底间距等工作参数之间的对应关系。
The way of pulse-width adjustment which can change the size, the direction and the action time of the electromagnetic resultant force in the stepping motor.
分析了步进电机产生低频振荡的原因，提出了一种新控制方法—脉宽调整法。
The pulse frequency was not printed, it is estimated from the size of the coils and transformer that the frequency doesn't exceed 50 Mhz.
脉冲频率不能打印，估计从变压器线圈的大小和频率不超过50兆赫。
The pulse frequency was not printed, it is estimated from the size of the coils and transformer that the frequency doesn't exceed 50 Mhz.
脉冲频率不能打印，估计从变压器线圈的大小和频率不超过50兆赫。
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