查询词典 acoustic velocity

Aiming at forecasting the torpedo acoustic homing range for actual targets under real water conditions, this paper summarizes the typical water conditions in different sea spaces and seasons, presents a forecast method of torpedo acoustic homing range, and establishes a transmission loss forecast model based on the ray acoustic theory and a reverberation level forecast model based on the cell scattering model.

针对真实水文条件下鱼雷声自导对实际目标的作用距离预报问题，总结了不同海域、不同季节的典型水文条件，提出了鱼雷声自导作用距离预报方法，以射线声学理论为基础建立了传播损失预报模型，以单元散射模型为基础建立了混响级预报模型。

Under the given condition of acoustic driver, the acoustic field including oscillating pressure, volume flow rate and acoustic impedance in resonator was theoretically reconstructed by using the two-microphone method. The experiment results validate that this method is applicable and accurate for the positions with non pressure antinode and node in resonator. The maximum errors near antinode and node area are up to 12.4%.

在给定双声源条件下，采用双传感器法对该系统谐振管中的声场参数（包括声压、质点速度、当地声阻抗等）分布进行理论声场重构，并通过实验分析，证实了该方法在等径谐振管内非声压腹点和节点处的适用性和准确性，而在声压腹点和节点处的误差最大达到12.4%。

As the development of modern electronic technology, the high efficiency and broad band acoustic transmitter for the battery using equipments, such as acoustic buoyage, portable underwater acoustic communication equipment and small scale underwater detector is demanded.

随着现代电子技术的发展，一些使用电池供电的水声设备如水声浮标、便携式水声通信设备、便携式水下探测设备等对发射机高效率、宽频带的要求越来越高。

Modal analysis of an acoustic system can determine its natural frequency and show the distribution of the acoustic quantities in space, give the knowledge about the way that the acoustic system responses are affected when changes are made in the excitation sources or in the domain geometry, and provide valuable information for the noise control of closed three-dimension domain.

通过对声学系统的模态分析，可以得到其固有频率以及在此频率下声学量在声场空间上的分布，了解到声源及声场空间几何参数的变化对声学系统的相应的影响，为三维封闭空间的噪声控制提供了依据。

Secondly, the acoustic wave equation is used derive the stiffness matrix of acoustic rectangular element for performing the acoustic field finite element analysis.

第二部分应用声场波动方程式配合二维矩形元素进行声场有限元素分析。

This paper mainly deals with the components of new acoustic borehole televiewer and the performance characteristics; at the same time, the paper compare the new acoustic borehole televiewer with the ordinary optical one and the old acoustic one.

中文摘要：主要介绍了新一代超声波钻孔电视的主要组成部分及其性能特点，并初步比较了其与常见的光学钻孔电视和前几代超声波钻孔电视的区别。

Our products cover anechoic chamber, acoustic test facilities, sound enclosure, recording room, audiometric room, acoustic door and acoustic panels.

产品涵盖消声室、隔声室等声学测试设施、录音室、测听室等专业用房、隔声罩、声屏障等降噪装置、以及隔声门、隔声板、吸声板、消声器等专业产品。

This paper investigated the true propagation paths of acoustic wave in two-dimensional temperature gradient field-single peaked symmetry and deflective respectively, using the two- dimensional acoustic ray tracing method of forward deploying triangle. Besides, a simulating calculation and analysis of this acoustic ray tracing algorithm in model temperature was given.

该文使用二维空间中的三角形前向展开方法，对二维温度梯度场中的声线轨迹进行追踪，并分别在具体的单峰对称温度场和单峰偏斜温度场模型中，对该声线追踪算法进行了仿真计算和分析。

Chapterl Establishment of the chronic and pressure-induced SD rat models for acoustic neurinomas Object To establish the chronic and pressure-induced SD rat models of acoustic neurinomas for the purpose of further experimental research on acoustic neurinoma related electrophysiology, function and pathomorphology of facial nerves and cochlear nerves.

第一章 SD大鼠听神经瘤慢性压力模型的建立目的建立SD大鼠听神经瘤慢性压力模型，为听神经瘤所致面、听神经电生理、功能及病理学改变的研究奠定基础。

Regular measured parameters in CBM uncased hole have gamma-ray,long and short spaced artificial gamma,spontaneous potential,dual lateral,dual caliper,acoustic,compensated neutron,well temperature and deviation etc,while gamma-ray,acoustic amplitude,acoustic variable density...

煤层气裸眼井常测的参数有自然伽马、长短源距人工伽马、自然电位、双侧向、双井径、声波、补偿中子、井温、井斜等，而固井质量检查测井则用自然伽马、声幅、声波变密度和磁定位等方法。

In contrast to the ubiquitous rising-sun-with-rays military flag of the Japanese, Chinese banners and ensigns feature a range of designs.

与遍地都是的太阳军旗不同，中国人的旗帜和徽章设计得各式各样。

From their small corner of Feng's Guangzhou headquarters -- a jumble of pink leashes, squeezable rubber steaks, and plastic doggy Santas for Fido's stocking -- Soleil's designers come up with at least five new products a month.

从Feng 设在广州总部的产品展示柜台上可以看到，Soleil的设计师每月至少设计出5件新产品。