查询词典 acoustic

The conventional numerical simulation of a reverberant field as a launch acoustic environment was introduced. Following the reciprocity theorem used in the coupled FE-BE model, the structural response due to reverberant acoustic excitation was substituted by the sound pressure caused by force excitation on the structure, then the output response power spectrum density of the coupled model subjected to reverberant environment was evaluated based on the stochastic analysis principle.

首先介绍了传统的构建混响声场的数值模拟方法；其后利用声振耦合中的互易定理，将混响声场的激励问题转化为结构模型上力激励引起的场点声压响应问题，并采用随机分析原理，用谱分析方法推导了结构在混响声场激励下的响应计算公式；最后建立了航天器典型结构的声振耦合模型，并分别用传统方法和利用互易定理的方法进行了数值模拟。

It is revealed that acoustic quality is an important consideration in these buildings, and it may vary considerably with the same objective acoustic indices such as sound pressure level and reverberation time.

分析表明了声品质在这类非声学建筑中的重要性，另外，即使客观指标例如声压级和混响时间相同，声舒适度亦可能完全不同。

Sound wave has both scalar quantity and vector field, while traditional acoustic pressure sensor system merely makes use of its acoustic pressure information.

声波兼有标量场和矢量场，传统的声压水听器系统仅利用了其声压信息。

A set of emitter which slenderize the acoustic wave has been designed, and also a set of receiver which select the scattered acoustic wave according to the position of the scattering particle has been designed.

研制出的发射传感器和接收传感器，能够分别产生细长的发射声束和接收声束，使信息窗区域面积能够控制在很小的范围内，位置也被控制在设计值处，满足了分区测量的要求。

Objective To supply suboccipital retrosigmoid approach drilling of the posterior wall of the internal acoustic meatus and preserving bone labyrinths. Methods Ten cadaveric adult heads were examined by internal acoustic meatus centered CT thin tomographic scan.

应用10例甲醛固定的汉族成人头颅湿性标本，以内耳道为中心进行了CT断层薄扫，在手术显微镜下磨开内耳道后壁，保护骨迷路，用游标卡尺、量规进行了测量。

FEM model of coupled acoustic-structure is set up, modal superpose method is used to deduce sensitivity of response acoustic pressure level to structure design variable.

基于结构-声场耦合系统有限元模型，用有限元模态叠加法推导了系统在动力载荷作用下响应声压级对结构设计变量的灵敏度。

The telemetry sub is the core of organization and management of the system,which provides necessary support of software and hardware for data acquisition, processing andtransmission;the ultrasonic imaging televiewer visually presents the condition of interwall ofcasing and the borehole wall;the acoustic caliper quickly and quantitatively detects the status ofinterwall of casing and borehole wall;the azimuth logging tool provides the casing damagelocation demanded by ultrasonic imaging televiewer and acoustic caliper.

遥测短接为该系统的组织管理核心，为各功能短接提供数据采集、处理及传输等所必需的软硬件支持；超声成像仪可直观显示套管内壁或井壁的自然状况，声波井径仪可快速定量检测套管内壁或井壁的状况；方位仪为超声成像仪及声波井径仪提供所需的套损方位。

Fifteen gram pyrotechnic composition with thermite content of 25% can produce the sound pressure level as high as 158.8 dB, and the acoustic frequency is mainly 0~5 kHz, then the acoustic energy decreases with the increasing of thermite content.

当高热剂的含量为25%左右时效果较佳，15 g药剂水下燃烧时的声压级达到了158.8 dB，频率主要分布在5 kHz以下，但当超过25%时声能开始下降。

It is an advanced technology. In all these methods,acoustic velocity thermometry based on the acoustic travel time is a better one with a wider use.

而在声学测温的各种方法中，基于声波传播时间的声速测温方法又是一种比较好的、应用更广泛的方法。

Gibson's first "semi-acoustic" the ES-335, which was neither totally solid nor fully acoustic, is the guitar of choice used by many famous guitarists such as Andy Summers, Elvin Bishop, Lee Ritenour, Jay Graydon, Robben Ford, Freddie King, John McLaughin, Jimmy Page, Chuck Berry, Tony Mottola, Johnny Rivers, Jack Wilkins, Bono, Grant Green, Eric Clapton, Stevie Ray Vaughan, Alvin Lee, BB King, Emily Remler, Otis Rush, Pete Townshend, John Lee Hooker, and Larry Carlton.

吉布森的第一个"半声"的ES - 335，这既不是完全稳固的，也不可能完全声，是由诸如安迪萨默，埃尔文主教，李莱特诺，杰伊格雷顿，罗本福特，弗雷德金许多著名吉他手使用的选择吉他约翰McLaughin，吉米佩奇，查贝里，托尼莫托拉，约翰尼河流，杰克威尔金斯，波诺，格兰特绿色，埃里克克莱普顿，史蒂维雷沃恩，阿尔文李，比比金，埃米莉Remler，奥的斯拉什，皮特汤森，约翰李胡克，和拉里卡尔顿。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。