谐波分析

In chapter 3, the general circumstance of microwave oscillator with dielectric resonator and electronic tuning are introduced, and we analysed the principles and methods of design, then we discussed the principles and designing methods of varactor diode tuning according to the principle of the FET oscillator.

第四章先介绍了FET倍频器和放大器的基本理论，然后介绍了分析设计倍频器和放大器的两种重要的方法：谐波平衡法和S参数法。

The theory is analyzed of restraining harmonic component and saving energy by means of using △-Y mixed winding on the three phase asynchronous motor .

分析了三相异步电动机采用△-Y混合绕组型式抑制高次谐波和降低电机损耗的原理。

This dissertation has deeply studied the tashes of the process of producing green laser according to the theory of velocity equation, the theory of second harmonic generation, the theory of fold cavity etc. In the meantime, a new system of green laser has been designed combining the discussion of the characteristics of activation media and doubling frequency crystals.

本文根据速率方程理论、二次谐波产生理论以及折叠腔等方面的理论，对绿光激光产生过程的诸环节进行了理论分析，同时在此基础上，结合对激活介质、倍频晶体特性的讨论，设计了新的绿光激光系统。

That is, the output from the coil is proportional to the time derivative of the current and therefore the obtained result is independent of direct current.

针对直流谐波电流测量幅值小、频带宽的特点及误差要求，分析了传感器及测量电路的灵敏度、误差和频率等性能。

A detailed model of non-linear parametric excitation vibration coupling the stay cable and the girder, in which the static sag as well as the geometric non-linearity are considered, is proposed in this paper. Based on several numeric examples investigated by the Galerkin method composed with the integration strategy, several kinds of factors effecting stay cable parameter vibration are studied. Another parameter vibration model by the axial excitation is presented and the corresponding nonlinear equations are derived. The smallest excitation amplitude,the transient state and steady state resonance amplitudes, and the changing characteristics of the axial force are obtained by using harmonic balance method. According to numerical examples calculated by numerical integration method, the effects of the inner damping of the stay cables are investigated.

本文创新地提出了斜拉桥拉索-桥面耦合参数振动模型，推导了索-桥耦合非线性参数振动方程组，联合Galerkin法及数值积分方法，对各种特性的拉索进行了数值求解，得出了影响拉索参数振动的各种因素；提出了斜拉索受轴向端激励参数振动模型，导出了模型的非线性振动方程，使用谐波平衡法得出了产生参数振动需要的最小激励幅值、共振时瞬态及稳态的振动幅值及索拉力的变化特性，并用数值积分方法对实际斜拉桥拉索进行了计算，分析了拉索阻尼对参数振动的影响。

At last the operation performance of six-phase synchronous motor is analyzed in comparison with three-phase motor. It is shown that six-phase synchronous motor possesses the advantages of lower torque ripple, less current harmony against three-phase motor.

最后对比分析了普通三相同步电动机与六相同步电动机的运行性能，表明了六相同步机具有转矩脉动小，电流谐波小等优点，从而优于三相同步电动机。

For a class of Shunt-wound Active Power Line Conditioner, based on analysis of mathematical model of system and target of control, the algorithm of fuzzy variable structure sliding mode control is presented. The control algorithm can avoid complicated calculation of harmonic electric current in traditional control algorithm, and realize the feedback control of electric current. The algorithm is simple and easily implemented.

针对一类并联型有源电网调节器在分析系统数学模型和控制目标的基础上，提出了模糊滑模控制策略，避免了传统控制方法中复杂的谐波电流计算，实现对电源电流的闭环控制，该算法简单、易于实现，仿真结果证实了变结构滑模控制的有效性。

The direct reason of abnormal vibration in this transformer is unreasonable shell structure of transformer case, which causes the greater residual magnetism in the transformer.

为尽快分析原因，确认该主变压器是否可以继续运行，对运行单位如何做好该主变压器的运行监视提出意见，对该变压器的振动、谐波、直流

So, we can have a definite concept about the degree of the leakage effect under the possible range of system frequency variation as an appropriate DFT-based algorithm is determined. Besides, the Prony-Based P.B.

故本文根据理论上DFT的演算过程，分析一般系统频率变动对DFT用於谐波及闪烁量测计算上所形成的振幅及相角误差，以了解在正常系统频率变动范围内影响的程度，作为选择适当DFT演算法之明确参考。

He and Nina moved to California and lived at 2005 Ivar Street, Apt.

他和Nina搬到加州，并在2005年伊瓦尔街，公寓生活。

Droperidol （ potently inhibits transfected HERGchannels and this is the probable mechanism for QT prolongation.

氟哌利多有效地抑制了转染的 HERG 钾通道，可能是 QT 间期延长的机制。