查询词典 acoustic depth sounding

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。

The acoustic phased arc array transmitter can be used in azimuthal acoustic reflection logging. It evaluates the azimuthal variation of borehole formation acoustic properties, which is useful for complex reservoir recognition and evaluation.

这种相控圆弧阵声波辐射器用于方位反射声波测井新技术中，可评价井旁地层声学性质沿井周方向的变化，有助于复杂油气藏的识别和评价。

The acoustic phased arc array transmitter can be used in azimuth acoustic reflection logging and evaluate the azimuth variation of acoustic properties in the borehole formation and also be useful for complex reservoir recognition and evaluation.

这种相控圆弧阵声波辐射器可用于方位反射声波测井新技术中，能评价井旁地层声学性质沿井周方向的变化，有助于复杂油气藏的识别和评价。

According to our present broadcasting situation,the thesis proposes using new technology to update and reform the present HFC. It also suggests broadcasting using self-advantage and arranging EPON in order to win the supermarket.

论文从我国广电的现状出发，结合实际，积极倡导采用新技术更新、改造我国现有的HFC网络；倡导广电现阶段利用自身优势，部署EPON网络来赢取市场。

A new general kinetic equation was derived in which the effect of the removal of condensation water was taken into account completely, and was applied to the polyesterification kinetic study of AA/HPHP and AA/NPG. It was found that the reaction order of self-catalyzed polyesterification was not constant. For these polyesterifications, the reaction order was 2.5 at a low temperature, while 3.0 at a high temperature.

考虑缩合水的排除对反应体系的影响，用体积浓度单位推导出一个新的聚酯反应总包动力学方程，并应用到AA/HPHP和AA/NPG两个聚酯化反应的动力学研究中，研究发现，自催化聚酯反应的反应级数并不是固定值，对于AA/HPHP和AA/NPG两个聚酯化反应而言，低温时反应级数为2.5，高温时反应级数为3.0。