查询词典 ultrasonic sound

On the basis of investigating the sound field of a plane piston transducer and the relations between sound field and radiation force, by settling four plane piston transducers driven at the same frequency at each corner of a regular triangular pyramid with their sound-beam axes crossing at the center of the pyramid, this technique uses ultrasonic wave synthetic theory to acquire a three-dimensional ultrasonic standing wave field. The micro-component can be captured, transported, released in the range of space by adjusting the phase of the transducers.

在研究单个圆形平面活塞换能器声场分布以及声场和辐射力关系的基础上，将以相同频率驱动的4个平面活塞换能器呈正四面体放置，利用声波合成原理获得三维超声驻波场，通过调整各个换能器发射信号相位之间的关系实现对微构件在空间范围内的俘获、移动、释放等操纵。

The signal fluctuations, the impact of temperature on the speed of sound reasons, ultrasonic ranging system ranging accuracy improved much more restricted, This also affected the ultrasonic ranging system in a number of precision applications demanding occasions, the problem of great practical significance Research

由于信号起伏、温度对声速的影响等原因，超声测距系统测距精度的提高受到很大的限制，这也影响到了超声测距系统在一些精度要求较高的场合的应用，所以这个问题的研究有很大的现实意义。问题补充：翻译软件译的就不要再贴上来了！

So if you're standing in front of the ultrasonic sound wave, you can hear the sound.

所以如果你站在超音速声波的前面，你能听到声音。

There are various ways to measure distance, including ultrasonic sound waves and infrared light.

有各种不同的方法来测量距离，包括超声波声波和红外光。

In this paper,the principle and primary results of measure ultrasonic sound velocity and attenuation coefficient by ultrasonic syntonic method are introduced.

1 前言各种介质的声学特性主要由声速、声衰减、声阻抗等参数来描述，这些量统称为介质的声学特征量。

It has also been confirmed by the measurement of ultrasonic sound velocity.

通过对其超声声速的测量，确认了此相变的存在。

Results The ultrasonic examination of tuberculosis hydrothorax showed that hydrothorax in thoracic cavity had no echo zone with clear sound transparent;pleura was thickened uniformly;opaque dark area of fluid had no parenchymatous phyma.Ultrasonic examination of cancerous hydrothorax showed that hydrothorax in thoracic cavity had no echo zone filled with full of thin light spots;sound transparent was not very clear;pleura showed uniform thickening;opaque dark area of fluid had parenchymatous uniform phyma.

结果 结核性胸腔积液超声检查显示胸腔内胸腔积液无回声区透声清，胸膜均匀性增厚，液性暗区内未见实质性肿块；癌性胸腔积液超声检查显示胸腔内胸腔积液无回声区内充满细小光点，透声欠清，胸膜多呈非均匀性增厚，液性暗区内可见有实质非均质性肿块。

The precision of the traditional ultrasonic localization method is limited due to unsufficiently precise estimation of the sound velocity and the time of flight, therefore, a new method, the special fusion method for redundancy ultrasonic information was proposed to solve the precision problem.

针对常规的超声波定位方法存在对决定定位精度的声速与渡越时间估算不准，导致定位精度有限的问题，提出了一种新的超声波绝对定位方法，即冗余超声波信息特殊融合法。

Round and rectangular piston transducers are the common sound source in ultrasonic nondestructive testing, and combination plane arrays of line and rectangular array are the foundation of investigating phased array technology, so simulating these sound field is significant for studying ultrasonic field simulation.

圆形活塞换能器、矩形活塞换能器是超声无损检测中常用的声源，而线列阵组合平面阵和矩形阵组合平面阵是相控阵换能器研究的基础，因而其声场的模拟在超声场模拟的研究中具有重要意义。

Ultrasonic series: low-voltage ultrasonic Micro- sprayer, Humidification machine, Precise oil fragrant machine, Ultrasonic Contact Lens Cleaner ,Ultrasonic generator ,Ultrasonic transducer , Ultrasonic cleaning machine ,Bolt clamped Langevin transducer , Piezo-ceramic ,Portable ultrasonic sound pressure meter ,Ultrasonic cutter machine , Ultrasonic two frequency cleaning machine.

超音波系列：中华民国专利低电压超音波微雾器，超音波大雾量雾化器，水氧机，芬多精活氧吧，超音波振动子，切割刀，音压计，超音波双频清洗机，超音波高频清洗机，隐形眼镜专用超音波清洗机，高性能发振机，自动化溶剂型高洁净度清洗机。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。