最后还讨论了时域法测量电极阻抗的激励信号的选择、测量频率上、下极限和噪声影响等问题。
The problems about the selection of excitation signal, limits of measurement frequency and noise influence have been discussed.
通过矩量法推导了阻抗矩阵和激励矩阵。
The impedance matrix and excitation matrix are derived by moment method.
结果：电极阵列、电极皮肤接触阻抗、激励频率均对检测信号有影响。
Results: the results showed that the measuring electrode, skin-electrode, contacting impedance, and stimulating frequency all influenced the measured signal.
作者用传递函数分析装置对上述系统进行了无约束(自由)的稳态激励试验、绘制了阻抗图。
An experiment on unconstrained (free) steady-state excitation has been made for the system mentioned by means of a transfer function analysis instrument, and impedance figure has been plotted.
通过分析生物阻抗测量系统的需求，设计了一种应用于生物阻抗测量的混频激励电流源。
A mixing frequency excitation current source is designed according to the analysis of requirements of the bioelectric impedance measuring system.
目的：比较两种基于直接数字合成技术的阻抗激励源的性能，为以后阻抗系统设计提供指导。
AIM: to compare the performance of two exciting sources based on direct digital synthesis (DDS) technology and to present some advice for the future system design.
前言：目的：探讨脉冲电流激励模式下测量生物电阻抗的原理及其实现。
AIM: To study the mechanism and implementation of current pulse exciting impedance measurement of bio tissues.
由于基础动力阻抗矩阵是外荷载激励频率的函数，采用更多参数的一般集中参数模型与数值解答吻合精度更高。
The general lumped parameter model introduced in this paper offers more accurate results than the traditional method for dynamic stiffness matrix of foundation is frequency-dependent.
目前测量相参激励下二端口网络输入阻抗常用的方法是，先用二端口网络分析仪测量网络的散射矩阵S，再将散射矩阵S转化为阻抗矩阵Z，最后求出不同相参激励下各端口的输入阻抗。
The common measurement of the two-port network'input impedance is to measure the S parameter, then Z parameter is calculated by the relation of S and Z, finally the input impedance is gained by the Z.
而这类天线可以等效成相参激励下二端口网络来进行输入阻抗的测量。
This type of antenna measurements can be translated into measuring the input impedance of two-port network.
目的：设计一个采用直接数字合成技术的电流模式多频阻抗激励源。
With the appearance of DDS ASIC, Direct Digital Synthesis(DDS) technology is wide ranging applied.
这一结果同样适用于其它高频激励CO2激光器的阻抗匹配网络的参数计算。
The results are also used to calculate the matching network parameters for other high frequency discharge excited CO2 lasers.
基于严格的全波方法分析计算了介质薄层覆盖下由探针激励的圆柱共形微带天线的输入阻抗和辐射方向图。
The reflected voltage on the reference plane, the computation of near and far electric fields of cylindrical monopole antenna are completed using this method.
基于严格的全波方法分析计算了介质薄层覆盖下由探针激励的圆柱共形微带天线的输入阻抗和辐射方向图。
The reflected voltage on the reference plane, the computation of near and far electric fields of cylindrical monopole antenna are completed using this method.
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