查询词典 acoustic speed

High-speed digital frequency synthesizers and acoustic pulse pressure device information table, principle, the device note.

高速数字频率综合器及声表脉压器件资料，原理介绍，器件说明。

The following are the expressions for the mean pressure set up at the detection plate and for the time of the signal to progagate from the radiator to the detector:这里是1个公式,省略） where Re is the real part of the expression appearing within the braces, 0 is the density of the medium, vo is the amplitude of the vibrational velocity, c is the speed of sound in the medium, d2 = I +(r/zcos 8, z is the distance between the emitting and receiving plates, B is the angle between the axis of the acoustic channel and the axis of the tube, r = vro/c, v is the flow speed of the fluid, d is the diameter of the pipe, m is the circular frequency, k is the wave number, where a is the radius of the plate (this is taken as the same for the emitting and receiving plates for simplicity, but there is no difficulty in discussing plates differ~mg in radii),,~ is the vibrational frequency of the emitting plate, and The triple sums in the expressions for N~ and N2 may be neglected if the flow speed is low, since the contributions for these become negligible.

以下的表情为代表的压力设置在检测板甲，手持骑枪和时间的信号 progagate从散热器排出到检测器(这里是1个公式、省略)。在什么地方才是真正的出现在背带，表现为0密度的吗当时的媒介的振幅振动速度、c是声音的速度中、d2 =我+ r / z，8、z是距离的发射和接收板、B之间的角度对声信道和轴轴管，r = vro / c，v的流体的流动速率公式，d 管直径的圆频率，m，凯西是波数公式* n，一个是半径的板(这是作为相同的发射和接收吗为了简单，但板板是毫无困难地讨论不同半径)、镁-，~的振动频率的发光，。总结了三倍的表达方式和N2 ~能忽略的流量速度低，因为这些变得微不足道的贡献。

The following are the expressionsfor the mean pressure set up at the detection plate and for the time of the signal toprogagate from the radiator to the detector:这里是1个公式,省略） where Re is the real part of the expression appearing within the braces, 0 is the density ofthe medium, vo is the amplitude of the vibrational velocity, c is the speed of sound in themedium, d2 = I +(r/zcos 8, z is the distance between the emitting and receiving plates, B is the angle between the axis of the acoustic channel andthe axis of the tube, r = vro/c, v is the flow speed of the fluid, d is thediameter of the pipe, m is the circular frequency, k is the wave number,where a is the radius of the plate (this is taken as the same for the emitting and receivingplates for simplicity, but there is no difficulty in discussing plates differ~mg in radii),,~ is the vibrational frequency of the emitting plate, andThe triple sums in the expressions for N~ and N2 may be neglected if the flow speed islow, since the contributions for these become negligible.

以下是表达式平均压力为定于检测板和为信号时间progagate从散热器到探测器：（这里是1个公式，省略）假如再是出现在大括号表达式的实部，0是密度中期，沃是速度的振动幅度，C是健全的速度中，D2中=我+的导向8，z是对之间的距离发射与接收板，B是声之间的通道轴角该管的轴，R =中心内大多分为/荤，v是流体的流动速度，，D是管道直径，m是圆频率，k是波数，的其中一盘是半径（这是为重点，同样的发射与接收为le简单板，但没有讨论板的困难，在半径不同毫克），，是发光板振动频率，和在N的表达式的三重总结和N2可以忽略，如果流速低，因为这些变得微不足道的贡献。

To distinctly find out the relationship between the rigidity of tablet and the ultrasonic speed,laser is emitted to the tablet and then we measure the speed of reflected surface acoustic wave and analyse the experimental data,finally get the tablet rigidity-wave speed curve.

为了清楚地了解片剂的硬度与超声波速度之间的关系，利用激光照射到片剂上，通过测定出反射的声表面波速度，且对实验数据进行分析，从而得出片剂的硬度与声表面波速度之间的关系曲线。

The new assembled digital Doppler rader was introduced in this paper. The results of comparison experiment show that the speed and direction of wind detected by the new rader conicide with those by tethersonde, and its functions are equivalent to those of Doppler acoustic radar with separated antenna developed previously in China and other countries.

本文对新设计的集合式数字多普勒声雷达作了介绍，对比试验结果说明新设计的声雷达测量风速和风向的结果与系留气艇测量结果相符很好，其性能与过去国内和国外分离式天线多普勒声雷达的性能相当。

The principle of measurements of speed of sound in gaseous phase is discussed and a cylindrical variable-path acoustic interferometer is described.

介绍了干涉法测量气体声速的试验原理和变程干涉声速测量的实验系统，使用本套测量系统测得的气体声速的精度可达5×10-4。

Systematic study is carried out to the main factors that influence the levitation stability during containerless processing of materials. The effect of the medium density r f , sound speed c , gravitational acceleration g , and resonant states Hm on the acoustic containerless processing is revealed.

对材料声悬浮无容器处理过程中，影响悬浮稳定性的主要因素进行了深入研究，揭示了媒质密度 r f ，声速 c ，重力加速度 g 和声场谐振状态 Hm 对声悬浮过程的影响机制。

A high speed high accuracy and multi-channel synchronous data acquisition system for array acoustic logging is designed, which can be used under downhole high temperature, the requirements for cross dipole simulation signal process for acoustic logging, the integration of acquisition circuit and method for its data processing are put forward.

设计了一种可工作于井下高温环境，用于阵列声波测井的高速高精度多通道同步数据采集系统，提出了声波测井对交叉偶极模拟信号的处理要求以及采集电路的构成和采集数据处理的方法。

Based on the relation between structure surface vibration speed and acoustic emission energy, this paper introduces a method which allows one to estimate the noise level from the vibration speed of one point of a gearbox surface and the operating deflection shape .

基于结构表面振动速度与结构辐射声能的关系，针对以结构声为主的变速箱现场噪声评价问题，提出根据结构表面单点振动速度和工作振型来计算结构辐射声能的方法，此法大大简化了变速箱现场噪声检测的过程，提高了检测效率。

Based on the violin, cello and double bass for the same position on the fingers rubbing strings rolling away from comparison and analysis of acoustic patterns; means single and double string rubbing rubbing means of acoustic string playing patterns and specific examples of analysis and comparison; refers to rub in the two-string Mixing strings with a single means to achieve the same sound, the string in the rubbing action on the comparison, so as to demonstrate the two-finger chord rubbing means smaller, the palm of your hand for a small, in the string rubbing speed, rubbing the string action is better than the single rate means the string rubbing , and can also increase the need for greater low-double bass string, the bit rate of rubbing

本文通过对小提琴、大提琴和低音提琴进行在同一把位上揉弦的手指滚动距离比较和声学图谱分析比较；进行单指揉弦和双指揉弦的声学图谱和具体演奏实例分析和比较；在双指揉弦与单指揉弦达到同样音响效果的情况下，在揉弦动作上的比较，以论证双指揉弦对于手指较细、手掌窄小的人来说，在揉弦速度、揉弦动作幅度上优越于单指揉弦，并且还可以根据需要更大程度上加大低音提琴低把位揉弦的幅度。

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。