Application of acoustic impedance in quality evaluation on well cementation by foamed cement.;
声阻抗技术在泡沫水泥固井质量评价中的应用
Study on the measurement technique on acoustic impedance of pipe flexible components;
管路柔性元件声阻抗测试方法研究
Study on the Key Technologies for Acoustic Impedance Reconstruction of Material with High Accuracy;
材料声阻抗高精度重建关键技术的研究
It is found in the study that the noise resistance(Rn) obtained through the time domain analysis is an important index for evaluation of corrosion resistance of the material,and that the pitting index(PI) reflects the uniformity degree of electrode reaction on the electrode.
采用同电极体系,测量了电沉积镍、铜镀层以及铂片在HC l和N aC l溶液中的电化学噪声,研究发现:通过时域分析得到的噪声电阻是评价材料耐蚀性的重要指标,而点蚀指数反映了电极表面反应的均匀程度;通过频域分析可知,高频段斜率可以用于评价镀层发生腐蚀的类型,而白噪声水平可作为判断材料耐蚀性的指标之一。
The results showed that the atmospheric corroding process could be effectively detected or monitored by analysis of the electrochemical potential and current noise and the changing of noise resistance.
利用该系统在实验室模拟和户外大气环境下进行了EN测试,研究结果表明,通过电位和电流噪声信号及噪声电阻变化可以对铝合金大气腐蚀过程进行有效检测。
However,the introduced signal processing approach using combined sound pressure p and vibration velocity components (V_x,V_y,V_z),which is based on constant acoustic impedance at different locations in sound waveguides,ignores the environmental effect on vector processing performance.
目前,矢量传感器在水声测量的探测技术中的应用已逐渐受到重视,但所采用的声压p和振速(Vx,Vy,Vz)联合处理技术还是建立在假定海洋波导中各位置处的声波阻抗数值都相同且为实数的基础上,而海洋环境效应的作用将不同程度地导致矢量处理器性能的降低。
This artical draws together theoretical models and real data to analyze the fluid properties in satured EDA media whose wallrocks are sandstone and limestone equivalently based on rock physics and the new methods of identification of fluid anomalies using acoustic impedances.
基于岩石物理学和利用声波阻抗信息识别流体异常的新方法,结合理论模型和实际资料,对砂岩和碳酸盐岩中流体饱和EDA介质进行了等效的流体分析。
In Dongsha sea area, taking the logging data and seismic stack velocity of ODP Leg at well 1148 as constraint,constrained sparse spike inversion was used to obtain acoustic impedance section.
声波阻抗可以提供丰富的岩性信息。
The technology principle, construction and design calculation of resistance noise reduction for HD6 5 1 big power local ventilation fan developed recently are discussed in this paper.
介绍了新研制的HD6 5 1型大功率局部通风机成功降噪的阻性消声技术原理、结构和有关计算 ,并应用在通风机上进行实际检测 。
acoustic impedance density
声阻抗密度，声阻抗率
opposition to the flow of sound through a surface; acoustic resistance is the real component of acoustic impedance and acoustic reactance is the imaginary component.
声音在通过一个表面时受到的阻力；声阻是声阻抗的实部，声抗是声阻抗的虚部。
Code for measurement of sound-absorbing coefficient and specific acoustic impedance of standing-wave meter
驻波管法吸声系数与声阻抗率测量规范
A Study on Acoustic Impedance Matching Criteria for Coating Thickness Measurement by Ultrasonic Interferometry
超声干涉法涂层厚度测量声阻抗匹配判据研究
Ultrasonic determination of carbon fiber composite porosity using acoustic impedance
碳纤维复合材料孔隙率超声声阻抗法检测
Instruments for the measurement of aural acoustic impedance/admittance
GB/T15953-1995耳声阻抗/导纳的测定仪器
IMPEDOMETRY (Analysis of 200 Normal Ears)
声阻抗测听(200只正常耳测试结果分析)
In the equivalent electrical network the acoustical mass of acoustic leaks is very important for impedance over the range from 250 to 1000Hz under the leakage conditions.
在250～1000赫频段内,声阻抗主要由它决定。
traumatic obstructive edema of glottis
外伤性声门梗阻性水肿
infective obstructive edema of glottis
感染性声门梗阻性水肿
sound surface wave band rejection filter
声表面波带阻滤波器
Closure at some point in the vocal tract that blocks the flow of air in the production of an oral or a nasal stop.
阻塞在发鼻阻音或阻塞音时，声带的某一点闭合，阻止气流通过
Performance of Sound-Absorbing Material Based on Flow Resistivity
基于流阻率的吸声材料声学性能研究
A Study of the Acoustical Properties of Compound Impedance in Sound Absorbing Structure
阻抗复合吸声结构的理论与声学特性研究
Studies of Acoustic and Flow Resistance Characteristics of Internal Combustion Engine Exhaust Silencers;
内燃机排气消声器声学和阻力特性研究
Sound Insulation Properties of Layered Damping Stiffened Panels Acoustic Shield;
阻尼复合加筋板隔声罩的隔声性能研究
External Impetance Network Used in Compensating Acoustics Energy Loss of Transducer in AO Device
阻抗网络补偿Hg_2Cl_2声光器件换能器的声能损耗
shout sb down shout to prevent sb from speaking
大声喊叫以阻止某人说话