查询词典 acoustic

The less the finger pairsNof surface acoustic wave element,the larger its bandwidthΔf/f,andthe largerits insertionloss,so the fingerpairsNis appropriately taken,and is nottoo small.

1引言现在小波分析的算法复杂，其算法运算目前绝大部分是在计算机中完成的，因而编程工作量大；也有一些人正在研究利用大规模集成电路进行小波变换计算，但还不成熟。

A shallow water acoustic field algorithm using finite automaton was presented.

提出一种用有穷状态自动机研究浅海声场的方法。

At first, basing on the boundary value problem concerned with fluid-composite structure interaction and characteristic of acoustic wave radiation, a generalized Hamilton variational principle is derived, and the equations of motion based on the finite element method is also derived.

首先，从复合结构与流体相互作用问题的有关混合边值问题出发，针对声波辐射特点，推导了一种广义形式的Hamilton原理及有限元形式的运动方程。

Mine which Flameproof and amphetamine-type language of the acoustic signal devices have national patent applications.

其中矿用隔爆兼本安型语言声光信号器已经申请国家专利。

The fly-back topology is adopted for DC/DC boost stage for simplicity. Moreover, full-bridge topology is used for DC/AC stage to give a low frequency square wave power to HID lamp avoid the acoustic resonance.

直流/直流升压级采用电路简单之返驰式转换器；直流/交流级则利用全桥式转换器以提供低频方波电能并藉此避免音频共振。

The refraction, reflection and propagation of the acoustic wave in a rod are studied quantitatively when a line-focused probe is employed in an axial scanning in immersion testing. The shape and position of the first and second focal line of the probe in the cylinder are calculated.

定量研究了采用线聚焦探头、液浸法、轴向扫描探伤时，棒材中声波的折射、反射和传播规律，计算得到了工件中的一次焦线和二次焦线的形状和位置。

The acoustic and acceleration sensitivity of the novel FOH are measured, and its performances under different temperatures and pressures are also tested.

对所研制的光纤水听器进行了声压和加速度灵敏度测试，并对其温度和压力特性进行了实验研究。

The test results obtained by National Defense Underwater Acoustic Metrology center show that, the FOH presented in this dissertation has extremely low acceleration sensitivity and excellent performance, which can completely satisfy the towed linear array application.The main results and the creative points of the present dissertation are as follows:1. A novel FOH structure is presented.

在国防水声一级计量站对(来源：ABe5f5e5C论文网www.abclunwen.com)所研制的拖曳线列阵光纤水听器的综合性能指标进行了全面测试，测试结果表明本论文研制的拖曳线列阵用光纤水听器具有很低的加速度灵敏度和很好的综合性能，已能满足光纤水听器拖曳线列阵的应用要求，这为光纤水听器拖曳线列阵的发展奠定了基础。

With coupler embedded and acceleration sensitivity compensation design, the structure symmetry is insured, which can induce the acceleration sensitivity effectively. The acceleration sensitivity compensation design also improves the production efficiency of FOH for towed linear array application.2. A good theoretical simulation platform, utilizing the method of elastic mechanics and the finite element method, is established, which can provide an effect predictive design for FOH. The experimental results are in good agreement with the theoretical analysises.3. Some key technology problems in the making of FOH for towed linear array application are conquered. The new developed FOH, with an acoustic sensitivity of -143.0dB, has acceleration sensitivity less than -30dB, which exceeded to results from other international reports.

本论文的主要成果和创新在于：1、提出了耦合器内嵌、带加速度灵敏度微调补偿的低加速度灵敏度光纤水听器结构，最大程度保证了工艺结构的对称性，实现了对工艺误差的有效补偿，提高了低加速度灵敏度光纤水听器研制的成品率。2、采用弹性力学和有限元方法建立了拖曳线列阵光纤水听器理论设计平台，实验与理论分析结果相一致，这为优化光纤水听器的结构设计提供了有效的技术手段。3、解决了拖曳线列阵用光纤水听器制造的关键技术问题，研制出声压灵敏度为-143.0dB，加速度灵敏度低于-30dB的拖曳线列阵用光纤水听器，其加速度灵敏度优于国际上已报导的结果，并在国防水声一级计量站对其进行了性能指标测试(来源：A14BC论文网www.abclunwen.com)。

I met Jonah Werner (now a rising acoustic folk songwriter star) in high school and started playing with him at the local coffee shop in Buena Vista mostly Jackopierce and other various folky songs.

在高中我遇到了Jonah Werner（现在成为了创作型民谣歌星）并且和他一起在布埃纳维斯塔唯一的一家咖啡店里演出-大多演奏的是Jackopierce的歌和其他民谣歌曲。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。