The computer simulation in underwater acoustic channels proves the efficiency of the algorithm. 水声信道的仿真结果验证了算法的有效性。
Acoustic agglomeration of coal-fired fly ash particles in low frequency sound fields Simulation and analysis of collision efficiency in acoustic agglomeration 燃煤飞灰低频下声波团聚的实验研究小颗粒声波团聚中碰撞效率的计算及影响分析
After solving the coupling equation, several parameters, which indicate the general characteristics of the shell vibration and sound radiation are calculated. The parameters are the acoustic radiated power level, the radial quadratic velocity level and the radiation efficiency. 通过求解流固耦合振动方程,计算了壳体在径向简谐激励下的表征壳体总体振动与声辐射的几个物理量:辐射声功率级、振动均方速度级和辐射效率。
Through experimental study, it is confirmed that changing the acoustic enviroment of the tissue is a relative safe and effective method to improve the treatment efficiency of HIFU and decrease its complications. 研究发现,通过改变组织的声学环境来增强靶区组织超声能量的沉积,是较为安全、有效的提高HIFU治疗效率和降低其并发症发生的方法。
It may match the impedance of acoustic loads in order to increase transducing efficiency. 为提高换能效率,可以采用匹配声阻抗法。
The target-detection model of acoustic torpedo is analyzed, and the model of fire efficiency is given, while the optimum falling zone of rocket assisted torpedo is confirmed by calculating. 本文首先深入研究了声自导***对目标的检测模型,进而建立了基于蒙特卡罗法的射击效率计算模型,通过仿真计算确定了火箭助飞***的最优落水区。
Also introduced the usual noise control has three ways: The control noise source, reduces the main acoustic source mechanical efficiency to transform as the radiated noise power proportion; 还介绍了通常噪声控制有三种途径:控制噪声源,降低主声源机械功率转化为辐射噪声的功率的比例;
The FEM application to eigenvalue of the structural acoustic coupled problems is discussed. The computational efficiency issues are analyzed based on the estimations and extrapolation techniques. Numerical results are given and taken as examples to demonstrate the validity of the analysis and the proposed method. 讨论了结构&音场耦合问题特征值有限元逼近,基于估计与外推技术,分析了计算效率,数值结果验证了分析与方法的有效性。
Based on the modal analysis and harmonic respondence analysis of piping system, the acoustic radiation efficiency is calculated; therefore it illustrates the connection between the vibration and noise. 基于管道振动的模态分析及谐响应分析,计算管道的声辐射效率,建立结构体振动与其辐射噪声之间的关系。
A time domain multiple access ( TDMA) protocol used for underwater acoustic channel which improves the network efficiency by interleaving the data frame at the physical level is presented. 本文提出了一种适合水下环境中通信网使用的TDMA方案,该方案通过TDMA数据帧的交错布置减少信道的闲置时间,提高网络效率。
Acoustic emission technology is introduced into rotor rub fault detection, combined with character parameters analysis method, amplitude distribution analysis, envelop spectrum method and higher-spectral analysis method, the efficiency of acoustic emission technology to rub fault is proved. 本文将声发射技术应用于转子碰摩故障检测中,结合特征参数分析方法、幅值分布分析方法、包络谱方法以及高阶谱分析方法,证明了声发射技术对转子碰摩故障检测的有效性。
The shape and size of transducers, array geometry and excitation delay of source array and the shifting time of acoustic signals received by receiver array affect the efficiency of acoustic beam steering in acoustic logging. 在声波测井中声束导向的效率除受换能器的几何参数及阵列声波发射单元的激励延迟时间或阵列接收器接收的各道声波信号偏移时间的影响外,还受换能器的形状和尺寸的影响。
Laser Acoustic Energy Conversion Efficiency Induced by Pulse Laser in Water 脉冲激光在水中激发声脉冲的光声能量转换效率
Experimental study of acoustic wave ash cleaning technology for improving efficiency of dust removing 声波清灰技术改善除尘效率的实验研究
The Acoustic Radiation Efficiency of A Rectangular Plate by Using Series Expression 平板声辐射效率的级数表达式
By adjusting valve opening and the volume of the gas reservoir, the influence of resistance and empty volume of load on the acoustic power output and thermal efficiency of the engine was also investigated. 通过改变阀门开度和气库容积大小,分析了负载的阻力和空体积对声功输出和系统热效率的影响。
Engine was studied. Taking a four-cylinder diesel engine as an example, acoustic response such as the entire engine's radiation power, the field point sound pressure level and the panel acoustic contribution, radiation efficiency etc. 以某四缸柴油机为例,利用ATV技术,计算得到了整机结构辐射声功率、外场域点声压(级)、结构面板声学贡献、辐射效率等声学响应。
Explore the biological and acoustic mechanism of the influence of nA-HIFU on the HIFU ablation efficiency. 2. 目的1.研究nA-HIFU影响HIFU消融效率的生物学机制和声学机制。
Investigation on the output characteristics and acoustic resonator of a traveling-wave thermoacoustic electric generator has great significance on improving the efficiency and making the whole system compact. 研究行波热声发电系统的输出特性和声学谐振器,对于提高系统的转换效率,使整个系统更加紧凑高效,进而推进行波热声发电系统的实用化进程具有重要意义。
For silica planar waveguide AO Bragg device, the influences of acoustic frequency, waveguide mode and thickness on overlap integral and the impacts of waveguide mode, acoustic power and acoustic aperture on diffraction efficiency are discussed. 对Si02平板波导型声光Bragg器件讨论了声频率与光波导模式及厚度对重叠积分的影响及波导模式、声功率和声孔径对衍射效率的影响。
The type of seabed sediment has relationship with its acoustic parameters; The acoustic method to classify seabed sediment can improve the efficiency of the task. 而海底沉积物的类型与海底介质的声学特性直接相关,利用声学方法进行海底沉积物类型判别工作能有效地提高工作效率。
Acoustic power and radiation efficiency of plate in the water are computerized and compared with those in the air. The numerical results in the water show that vibration has modal interaction at low frequency. 对板结构在水下的辐射声功率、辐射效率进行了计算,并和空气中的结果进行对比。
Higher temperature increases acoustic agglomeration efficiency slightly, which means acoustic agglomeration still work in high temperature environment to agglomerate the fine particulate matter. 温度升高,声波团聚效率略有上升,说明高温环境中声波可有效地团聚细颗粒。
Electromagnetic acoustic technique is couplant-free, which can favorably generate several types of ultrasonic waves, contributing to a better performance in efficiency and accuracy. 电磁超声技术无需使用耦合剂,并且能够很方便地产生多种类型的超声波,有利于提高检测效率和检测精度。