And based on MSP 430 F 427 , multi-frequency underwater acoustic signal data collecting device is designed.

The core problem of this thesis is to study the different acoustic signal identification methods.

本论文的核心就是研究不同地声目标识别方法.

The acoustic velocity of a rock varies according to its elastic constants and density.

岩石的声波速度随其弹性常数和密度而变化.

The linear relationship between the nodularity and acoustic velocity has been accepted.

球墨铸铁的球化率随超声声速的线性变化关系已经被人们所认同.

A new passive and wireless Surface Acoustic Wave ( SAW ) sensor array is introduced.

介绍了一种新型的无源、无线声 表面波 传感系统.

Biot ( 1956 ) established a fundamental theory of acoustic wave propagation through a fluid saturated porous elastic medium.

1956年Biot提出流体饱和多孔介质声传播理论,奠定了该声学分支的理论基础.

For very high frequency clocks, a surface acoustic wave ( SAW ) oscillator is preferable.

对于非常高的频率时钟, 用声 表面波 振荡器更好.

Chemical sensing film is the key component of surface acoustic wave ( SAW ) gas sensor.

化学吸附敏感膜是声表面波 ( SAW ) 气体传感器的关键组成部分.

Surface Acoustic Wave Components , Capacitors, EMC Filters , NTC Thermistors , PTC Thermistors, Ferrites & Accessories, Inductors, Microwave Ceramics, Arrestors, RF Modules etc.

声表面波元件, 电容器, 电源滤波器, 热敏电阻,压敏电阻, 铁氧体磁心 与 附件, 电感器件, 微波陶瓷元件, 气件放电管, 射频前羰模块等等.

Chebychev spectral elements approximation of the acoustic wave equation first-order Clayton-Engquist-Majda absorbing boundary conditions was derived.

推导并实现了带吸收边界条件的二 维 波动方程的切比雪夫谱元解法.

Acoustic wave is the only information carrier which can propagate long distances in sea water.

声波是唯一能在海水中远距离传播的信息载体.

The result is consistent with the data of acoustic wave instrument.

反演结果与声学波浪仪观测数据比对,两者是比较一致的.

Piezoelectric ceramic is used widely for ultrasonic surface Acoustic wave touch screen.

压电陶瓷,广泛应用于超声波触摸屏.

A pulse acoustic wave and its relationship with OAO flurescence are recorded.

记录了CO_ 2脉冲激光激发BCl_3分子时形成的脉冲声波,及其与OAO荧光的对应关系.

The acoustical and communications engineer is concerned with the generation, transmission, and absorption of sound.

声学和通信工程人员研究的问题涉及声音的产生 、 传播和吸收等.

Household and similar electrical appliances-Test code for the determination of airborne acoustical noise-Part 2-7 : particular requirements.

家用和类似用途电器.气载噪声测定试验规程. 第 2-7 部分: 特殊要求.

Listening to jazz, classical, and roll, R & B, country, or folk is a kind of acoustical travel.

聆听着爵士乐 、 古典乐 、 摇滚乐 、 R & B 、 乡村乐或民俗音乐时,是一种听觉上的旅行.

Objective To understand minute anatomy and adjacent relationship of human internal acoustical meatus ( IAM ).

目的了解人类内听道的 微细 解剖,以及毗邻关系.

The result provides valuable reference for projects including noise control diagnosis acoustical environment design etc.

计算结果可为噪声控制、故障诊断、声环境设计等工程实际应用提供有价值的参考.

The relation between clay-bearing carbonate rock acoustical and lithological characters was investigated under the air-saturated condition.

考察在空气饱和状态下,含泥质碳酸盐岩声波性质与岩性特征之间的关系.

The pitch period and the spectral envelope of speech represent acoustical characteristics of the speech signal.

基音周期体现了发声过程肺部气流的周期性,而语音频谱包络是人的声道共振滤波特性在频域中的表现.