The frequency response will be good as well, since there is no loss in effective impedance at low frequencies. 频响也会好一些,因为低频段有效阻抗不会下降。
The decreased effective output impedance causes the amp to react less to the speakers. 减少的有效输出阻抗的放大器的原因作出反应较少的发言。
Connecting with exterior grounding conductor is an effective measure to decrease ground grid grounding impedance. 对接地阻抗测量原理进行研究,分析推导出接地阻抗计算公式。
The results show that the new type accelerating cavity has relatively high effective shunt impedance and quality factor. 计算结果表明:该种新加速腔具有较高的有效分路阻抗和品质因数。
Effects of Boundary Conditions on Effective Impedance in Hybrid Methods for Mid-frequency Vibration Analysis 中频振动杂交分析方法中边界条件对等效阻抗的影响研究
The results show that the transmitted power flow estimation accords with the measured vibration level difference in effective frequency range of measured impedance, so the power flow estimation may be used to guide the design of the isolation system. 结果表明:在测试阻抗的有效频率范围内,功率流传递率估算与实测的振级落差总的趋势一致,说明功率流估算对设计有指导意义;
Finite element method is used to analyze the performance ( e.g.microwave effective refractive index, modulation bandwidth, and characteristic impedance) of the novel modulator with ACPS or SCPS electrodes. 利用有限元法对非对称共面带线(ACPS)和对称共面带线(SCPS)两种电极的光纤型调制器微波等效折射率、调制带宽和特性阻抗进行分析。
After making an analysis of the dependence of the characteristics of the ridged structure on the ridge height and other parameters, we can obtain that as the ridge height increases, the effective index and the conductor loss decrease, but the characteristic impedance increases. 通过分析脊深和其它尺寸参数对调制器特征参量的影响,可以看出随着脊深的增加,有效折射率减小,特征阻抗增加,导体损耗减小。
Conducted lithologic prediction for effective recognition of reservoirs by inversion of elastic wave impedance on the basis of inversion of S-wave velocity; 在横波速度反演的基础上,通过弹性波阻抗反演进行岩性预测,有效地识别储层;
Results from calculation examples and actual power network calculation show that the proposed method can effective decrease the modification times of elements in impedance matrix and speed up the fault calculation and enhance the efficiency of relay coordination software for large and complicated power grid. 算例和实际电网计算结果表明该方法有效减少了阻抗矩阵元素的修改次数,提高了故障计算的速度及大型复杂电网整定计算软件的效率。
Conformal mapping method is introduced into the analysis to calculate the characteristic values of the transmission line, e. g. effective permittivity ε_ eff, characteristic impedance Z and unit capacitance C. 在分析中引入了保角映射等数值方法,给出了有效介电常数εeff、特征阻抗Z、单位电容C等传输线指标随几何参数变化的计算公式。
In this paper, an effective method is presented to calculate distributed capacity and characteristic impedance of asymmetric TEM cells without complicated evaluation. 本文推导了一种计算非对称横电磁波传输室分布电容和特性阻抗的简单、有效的方法。此法物理意义明确,既能计算主段,又能计算过渡段的分布电容;
Electrodes of concentric type placed anterior and posterior were proved to be more effective for epigastric impedance measurement. 人体实验表明,胃部体表阻抗的测量能够表征胃的蠕动和排空。
The theoretical formulas for the filling factor, effective dielectric constant, reduced wave impedance and reduced waveguide wavelength are given. 给出有关填充因子、有效介电常数、约化波阻抗和约化波导波长的理论公式。
Based on Bishop ′ s effective stress formula, one-phase flow consolidation theory, and impedance function recursive method, considering the effect of underground water level, the dynamic response of a pile embedded in two-layer soil and subjected to a vertical load is theoretically investigated. 基于Bishop有效应力公式、单相流固结理论以及阻抗函数递推方法,研究考虑地下水位影响时双层土中桩的纵向振动特性。
An effective evaluating method of gastric motility adopting impedance measurement has been proposed. 提出采用阻抗测量建立有效的胃动力学评价方法;
The analytic expressions for its relative effective permittivity, capacitance per unit length and characteristic impedance are given. 给出了它的有效介电常数,单位长度电容和特性阻抗的解析表达式。
The model uses the effective impedance of the microstrip line as the value of matched resistive load and assign it into the RL mesh region in a proper proportion. 该模型将微带线的有效阻抗作为匹配负载电阻,然后按适当的比例分布到端接面的网格中。
The algorithm is tested using clinical ICG data and proved to have satisfactory results compared to coherent average method which shows that the WT is an effective technology for analyzing and processing of impedance differential signals. 采用临床医学ICG数据对算法进行了检测,结果表明,对C波的漏检率与采用传统的相干平均法相比明显降低,因此,小波变换是心阻抗微分信号分析与处理的可行且有效的方法。
Because prestack seismic data contain abundant both P-wave and S-wave information that are close relative to lithology, so more abundant and effective lithologic information can be obtained from inversion of prestack data in comparison with from ordinary poststack impedance inversion. 由于叠前地震数据同时含有丰富的纵波和横波信息,而且这些信息与岩性密切相关,因此根据叠前数据的反演可以得到比常规叠后波阻抗反演更丰富、更有效的岩性信息。
The calculation results have shown that when the angles of the center electrode and the grounds decrease, the effective index, the characteristic impedance, and the conductor loss all decrease. 通过计算发现,随着中间电极角度和地电极角度增加,有效折射率、特征阻抗同时减小,导体损耗系数也随之减小。
The detection principle of a new type of electromagnetic fuze based on the target eddy current electromagnetic induction and effective impedance principle are discussed. 建立了弹目交会时的电路模型,提出基于目标涡流互感和有效阻抗机理的电磁引信的探测原理。
EBG ( Electromagnetic Band Gap) structure is a kind of periodic structure that has some special characteristics, such as bandstop, slow wave, and high effective characteristic impedance. 电磁带隙(ElectromagneticBandGap,简称EBG)结构是一种具有带阻特性、慢波特性、高等效阻抗特性的周期性微波电磁结构。
In this paper, a simple and effective method to extract characteristic impedance and effective relative permittivity of equivalent even transmission line realized by defected ground structure has been presented. 对缺陷地结构(DGS)实现的等效均匀传输线提出了一种简单有效的由S参数求其特性阻抗和有效相对介电常数的方法。
The traditional method for eliminating harmonic, i.e. passive power filter is not effective. It tends to oscillate and amplifies the harmonic for its compensating performance is subject to the grid impedance and the operating state. Furthermore, it can only compensate the harmonic of fixed frequency. 传统的无源电力滤波其补偿特性受电网阻抗和运行状态的影响,易和系统发生并联谐振,导致谐波放大;另外,它只能补偿固定频率的谐波,补偿效果也不是很理想。
We first analyze the resonant modes of the three absorbing peaks based on the surface current distribution. And then we study the influence of effective impedance and loss characteristics of TAR absorber. 首先从表面电流分布分析了三个吸波峰值点的工作模式,从TAR结构的等效阻抗和损耗特性分析其对吸波性能的影响。
A simple, efficient, high-precision approach to impedance automatic testing, data automatic analysis and processing, and filing of the system provide an effective evaluation method for the MEA impedance. 自动阻抗测试分析系统以一种简便、高效、高精度的自动测试方式和数据自动分析处理及存档,为电极提供了有效的评估方式。
Finally, the numerical examples are given similarly and compared with the MoM, verifying the method is effective. Finally, the AWE technique and the impedance matrix rational interpolation method combined with the equivalent dipole moment ( EDM) method are analyzed respectively. 最后同样给出了算例并与MoM对比,验证了该方法的有效性。最后分别将AWE技术、阻抗矩阵有理插值法与等效偶极子(EDM)法相结合。
However, the effective skin depth and the equivalent surface impedance of multilayer metal-plating are the direct reflection of the boundary condition of multilayer metal-coated guided wave structures. 而多层金属镀膜的等效趋肤深度和等效表面阻抗,是多层金属镀膜导波结构边界条件的直接反映,是分析多层金属镀膜导波结构的基础和关键,必须要首先加以分析。
Then, the effective impedance of the structure is analyzed to calculate its reflectivity and transmissivity of vibration isolation. Finally, numerical simulation is carried out and some useful conclusions are obtained. 然后通过分析周期复合声子晶体结构的有效阻抗,求出其反射系数和隔振传递率。最后对该周期结构进行了数值仿真。