本文对微穿孔板的非线性声阻抗率作理论与实验两方面的研究。
In this paper, the nonlinear acoustic impedance of the micro-perforated panel is investigated both theoretically and experimentally.
在高声强下测量了微圆孔处声激发射流的速度和微圆孔的非线性声阻抗。
Both the velocity of the sound-excited jet flow at a small circular orifice and the nonlinear impedance of the orifice are measured at high sound intensity.
这在非线性负阻抗的模拟实现中，更为突出。
This phenomenon appears even more striking in the simulation realization of non-linear negative impedance.
在混凝土类软化材料断裂研究中，裂纹端部损伤区被简化为具有黏聚应力分布的非线性裂纹，该黏聚力对裂纹扩展有阻抗作用。
In the fracture study of softening materials, the damage area of crack tip is regarded as a piece of nonlinear crack with cohesive force.
实验表明，水泥试块在水灰比为0.38 ~ 0.62时，水泥试块的声阻抗与抗压强度间呈非线性关系。
It was found that a nonlinear relationship existed between the two physical parameters, when water and cement ratio was 0.38 ~ 0.62.
本文通过研究主动脉容积变化微分方程，导出了心阻抗图与心脏射血的非线性函数关系。
This paper derived a non-Linear function relationship between the cardiac impedance plethysmogram and the heart ejection by researching differential equation of the aortic volume change.
尤其较好地解决了高阻抗非线性故障的识别问题。
Especially it solves the identification problem of high impedance fault well.
此时电压互感器的励磁阻抗和系统的对地电容形成非线性谐振电路。
At this moment, the excitation voltage transformer impedance and the system-to-ground capacitance come into being non-linear resonant circuit.
由于电弧电阻非线性、时变性、高阻的特点，使得常规原理馈线保护中的阻抗保护、电流速断保护往往不能正确动作。
For the arc resistance is nonlinear and high, the conventional feeder protections, such as impedance protection and current protection, maybe fail to trip off.
利用相应的高层次模型，详细分析并仿真了电流源匹配误差和电流源输出阻抗对DAC的非线性误差nl、信号噪声失调比SNDR、无杂波动态范围SFDR的影响。
With corresponding models how the matching errors and output resistance of current source affect the NL, SNDR and SFDR of DAC is analyzed and simulated in detail.
与现有结果比较指出，如不考虑阻抗规律的非线性性质，势将低估其性能。
In comparison with the existing results, it is found that the performance of the system will be underestimated, if the nonlinear characteristic of the impedance is not considered.
与现有结果比较指出，如不考虑阻抗规律的非线性性质，势将低估其性能。
In comparison with the existing results, it is found that the performance of the system will be underestimated, if the nonlinear characteristic of the impedance is not considered.
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