截止频率

并联负反馈放大器下限截止频率f（Lf）解析式的多样性

An analytical formula variety of the lower cut-off frequency of amplifier with parallel negative-feedback

结果表明，当波动频率小于截止频率ωc时，磁声重波将在磁层中被反射。

The result shows that the magneto-acoustic-gravity waves are reflected in the magnetosphere when the frequency of waves is smaller than the cut-off frequency ω c.

应用B样条有限元法计算横电磁波传输室中高次模的截止频率

Computation of Higher-order Mode Cut-off Frequencies in TEM Cells Using B-spline Finite-Element Method

使用MATLAB对信号进行频谱分析，确定了截止频率。

The frequency cutoff is determined through spectrum analysis on MATLAB .

含有E面介质和铁氧体片槽形波导的模式截止频率

Mode Cutoff Frequencies of Grooved Waveguide Loaded with E Plane Dielectric and Ferrite Slabs

不同滤波函数和截止频率PET重建图像的结果比较

The Study of Reconstructed PET Images with Different Filter and Cutoff Frequency

在截止频率相同的情况下，涡电流检测仪后采用二阶RC有源滤波器纹波较小，效果较好。

In comparison , the RC active power filter of second order is better .

并且根据误差模型，给出了滤波截止频率的相应取值以及GPS定位精度指标。

And in terms of this error model . filter cutoff-frequency and the requirments for positioning of GPS are given .

截止频率可变的线性相位FIR滤波器设计

Cut-off Frequency Variable Linear Phase FIR Filter

本文提出了应用边界元法求解TEM小室中高次模截止频率的方法，求出了多个TE和TM模式的截止频率值。

The boundary-element method is proposed to investigate the higher-order mode cut-off frequencies in TEM cells .

用非均匀网格FDTD法计算部分介质填充脊波导的截止频率

Analysis of the Cutoff Frequency of Ridged Waveguides Partially Filled with Dielectric by Non-uniform FDTD

等离子体填充周期性耦合腔链后，形成周期性的截止频率为0的等离子体TG模式。

The periodical CC chain filled with plasma demonstrates periodical TG modes with a cutoff frequency of zero .

模拟HBT电流增益截止频率新方法

A new method to simulate current Gan cutoff frequency on HBT

最后利用PSPICE工具进行仿真，实验结果表明具有截止频率可调的特性。

Finally , the PSPICE simulation shows the tunable characteristic of cut-off frequency .

该滤波器具有高截止频率、与MOS工艺兼容、便于单片集成等优点。

The filter features high cut-off frequency and the fabrication process is compatible with MOS process .

用FDTD法计算外开槽同轴波导的归一化截止频率多槽[有齿，花键]轴

FDTD Method Analysis of the Normalized Cut off Frequency of Coaxial Waveguides with Outer Slotted spline shaft

隧道和煤矿井下巷道都可看作是波导，在空隧道中电磁波存在着截止频率，列车的存在改变了隧道的截面形状和尺寸，改变了TEm。

Tunnel and mine well tunnel can be regarded as waveguide , there exists a cut-off frequency of electromagnetic wave in the tunnel .

用横向谐振法分析了双H形波导，对其色散特性和截止频率等进行了数值计算和理论分析，将所得结果进行比较，证明了该分析过程的正确性。

This paper analyzed the double-strip H-guide by using the transverse resonant method . Some important results were got from calculation and analyzing the properties of dispersion and cut-off frequency .

推导并仿真了伺服带宽ωB与开环截止频率ωC的定量关系，为某机载雷达伺服带宽的工程设计提供了一种快速有效的方法。

Deduces and simulates the quantitative relation of servo bandwidth ω B and opened loop cutoff frequency ω C , and provides a quickly and efficient method of design for airborne radar servo bandwidth .

存在中心凹陷时α光纤的LP（11）模的归一化截止频率

Normalized cut-off frequencies of the LP_ ( 11 ) mode in α - power fibers with a central dip

给出用时域有限差分（FDTD）方法计算电磁场问题的差分格式，详细介绍了FDTD法分析介质填充波导截止频率的计算过程。

This paper presents the method of computation for waveguides partially filled with dielectric by using finite-difference time-domain ( FDTD ) method .

本文利用无量纲参数、变分-有限元法和优选法来确定任意折射率剖面光纤LP（11）模的归一化截止频率Vc。

Variation-finite element and optimum-seeking methods for determination of the normalized cut-off frequency Vc of the Lpa anode in an optical fiber with dimensionless parameters are presented in this paper .

测试不同烧结温度下的样品的磁谱表明，随着烧结温度的上升，复数磁导率μ的实部μ′上升，但共振频率fr和截止频率fc均下降。

The complex permeability under different sintering temperature was measured , the real patr of complex permeability increased , but resonance frequency fr and cut-off frequency fc went down while sintering temperature rose .

本文详细讨论了折射率中心凹陷对W型单模光纤的归一化截止频率、归一化传输常数、色散特性和功率分布的影响。

Effects of central dip in refractive index on the normalized cut-off frequency , normalized propagation constant , dispersion and power distribution of W-type single-mode fibers have been studied in detail .

并在此模型基础上对电子在基区中的渡越时间、HBT的电流增益和截止频率等进行了计算。

Based on this model , the electron transit time , the current gain and the cutoff frequency are calculated .

然后在DCT变换域内设计一个低通滤波器，通过动态设计滤波器的截止频率消除高频噪声。

Then , a low-pass filter is designed in the DCT transform domain . High frequency noise is eliminated through the dynamical cut-off frequency of filter .

波导单模工作的带宽由E（y）1和E（y）2模式的低端截止频率决定。

And the bandwidth when the waveguide operates in single mode is determined by the cutoff frequency of the E_ ( y ) 1 mode and that of the E_ ( y ) 2 mode .

相对凝视系统而言，该扫描型FPA空间截止频率更高、视场更宽。

The line array FPA has much higher space cutoff frequency and wider FOV relative to the staring system .

渐近分析与数值考察都表明，井径r1→∞时，柱面Love波频散方程趋向平面双层半空间的Love波方程，柱面Love波的截止频率趋于零。

The asymptotic expression of dispersion equation of cylindrical Love waves as well radius r 1 →∞ consistently tends to the dispersion equation in the horizontal half space case , and cut off frequency tends to zero .

通过数值计算考察了柱面Love波的频散特性和激发强度，发现最低阶柱面Love波具有截止频率，这与平面半空间双层弹性介质模型下的Love波无截止频率的特征不同。

Dispersion and excitation of cylindrical Love waves are investigated by numerical calculation . It is discovered that the lowest order cylindrical Love waves have cut off frequency , which differs from Love waves in half space with horizontally double layered elastic media .