超声波

With the development of supersonic jet planes, the world is becoming smaller and smaller

随着超声波喷气式飞机的发展，世界正变得越来越小

This article discusses a supersonic range finding system based on chip,described the princinple of hardware and software design.

本文介绍了一种基于单片机控制的超声波测距系统，详细阐述了其硬件及软件的设计原理。

The test results indicated that the strength of concrete could be estimated by supersonic velocity values.

结果表明由超声波测试得到的声速值可以方便地估算出混凝土的强度。

The advantage of this kind sensor is that the feeble vibration produced by ultrasonic wave on the surface of solid plate transmission can be detected accurately.

这种传感器的特点是能够精确地检测由固体表面传播的超声波产生的微弱振动。

The nanodiamond dispersion experiment was done by inorganic electrolyte, surface-active agent and supersonic wave methods.

分别采用无机电解质、表面活性剂和超声波等方法对纳米金刚石进行了分散实验研究。

Pestrepeller automatically sweep the ultrasonic range of 24,000 Hz to 50,000 Hz, the adjustment knob allwa the rate of this sweep to be varied to prevent pests from developing an immunity to a pre-selected single sweep rate.

驱害器自动将超声波频率在24，000Hz到50，000Hz之间变换，调整按钮可以对这个频率范围进行调整以防止害虫对预设的单一频率范围产生免疫性。

Nano-SiO_2; Nanocomposites ; Epoxy syntactic foam ; Ultrasonic-Wave

纳米SiO2；纳米复合材料；环氧复合泡沫塑料；超声波

If the ultrasonic power doesn't work at the resonant frequency of mechanical syntonic system, UVC is not able to go along continuously and stably.

若超声波电源的工作频率不能自动跟踪机械系统的谐振频率，超声振动切削就无法持续稳定地进行。

An application system is designed to monitor the parameters in real time in this paper. The paper emphasizes VO characteristic of THE PROBE sensor and syntonic sensor and H2S concentration sensor based on analyzing the working principle of many kinds of sensors.

该系统在分析了目前常用的各类压力、液位和气体浓度传感器工作原理的基础上，着重介绍THE PROBE一体化超声波液位传感器、谐振式压力传感器和硫化氢气体浓度传感器的输入输出特性，完成传感器的选型。

Advanced ultrasonic flowmeter of overseas is adopt, technical flow of gas well is predigested. At the same time, syphon flowmeter is applied for the first time in the measure of gas well and spot experimental work of syphon flowmeter is accomplished.

采用了目前国外先进的超声波流量计，简化采气井工艺流程，同时首次将弯管流量计应用到了采气井计量中并完成了弯管流量计的现场试验工作。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。