声速的

The performance of hardware and algorithm of supersonic PIV system were analyzed.

分析了超声速PIV系统的硬件及算法应具备的性能。

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。

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。

Partial structure similarity model design concept is a better method for composite flutter model design, which can be applied to design transonic flutter model for aircraft wing and tail plane.

部分结构相似设计方法是一种较为实用的复合材料颤振模型设计方法，可用于飞机机翼、尾翼的跨声速颤振模型设计。

This paper emphasized on the investigation and comparison of two different methods of acoustic velocity thermometry in gas medium,as well as an analysis of their advantages and disadvantages respectively.

本文着重对气体介质中声速测温的两类测量方法进行了研究和比较，分析了其各自的优势与不足。

PAN fibers with different drawing ratio and different preoxidation degree were investigated by means of sound velocimeter and X-ray diffraction meter.

采用声速仪及X射线衍射仪对不同牵伸倍数和不同预氧化程度的PAN纤维进行取向度和预氧化程度的测试，并将其结果进行对比。

The scattering intensity and the sound velocity of the acoustic phonon decrease with x.

实验还发现声学声子的散射强度和声速随Bi含量的增加而减少。

This signal source is specially used in the experiment which measures the velocity of sound by ultrasonic.

它与实验中应用的声速测量仪及示波器配合，可以采用驻波法、相位法、时差法等测量方法来测超声波的速度。

Thirdly, the evolving process of the vortical structure and its singularity characteristic are also analyzed.

给出了高超声速圆球绕流尾迹结构的周期性演化过程，对其涡系结构的演化及奇点特征进行了分析。

The experiment was done in the pressure-vacuum supersonic wind tunnel of Muroran Institute of Technology of Japan.

实验是在日本室兰工业大学的压力—真空型超声速风洞中进行的。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。