Modeling and compensation parameter design of the DC bus voltage loop are done . Mechanism of produce of third harmonic is analyzed and gives the voltage loop piecewise control strategy .

对直流母线电压环进行了建模和参数设计，分析了 三 次 谐波的引入机理，并给出了电压环分段控制策略。

Third Harmonic Injection Control Strategy of Improved Z-Source Inverter

改进Z源逆变器的 三 次 谐波注入控制策略

Laser frequency was stabilized on some of the hyperfine components with third harmonic technique .

用 三 次 谐波锁定的稳频电路实现了该激光器在碘饱和吸收线超精细分量上的频率稳定。

Characteristic Analysis on Inter-Harmonics and Sub-Harmonics in the New Type of Industry Converting System The Third Harmonic Generation in Asymmetrical Quantum Well

新型工业变流系统间谐波与次谐波特性分析非对称量子阱中非线性 三 次 谐波 特性研究

In this paper nonlinear frequency conversion of second harmonic and third harmonic of femtosecond Ti : sapphire laser is theoretically and experimentally studied .

从理论和实验上分别研究了飞秒掺钛蓝宝石激光二倍频和 三 倍频的非线性频率转换过程。

The theory of harmonic radars is intensively studied in this paper . The model of scattering process for nonlinear targets is built . The voltage and power of the third harmonic scattered from the targets are calculated .

本文对谐波雷达理论进行了深入研究，建立了非线性目标散射过程的模型，计算出了目标散射的 三 次 谐波电压和功率，推导出了三次谐波雷达截面积和谐波雷达方程。

Some useful conclusions are gained by the comparison of the calculation results and the experiment results on a third harmonic excitation synchronous generator .

并对 谐波励磁同步发电机上的实验结果与计算结果进行了比较，得出了一些有用的结论。

In order to restrain the distortion of third harmonic some methods are successfully used in system parameter design .

为了抑制输入 电流 的 三 次 谐波 含量，在参数设计中采取了相应的措施。

The third harmonic output of a Nd-YAG laser ( 355 nm ) was used for excitation and ionization .

Nd-YAG激光的 第 三 谐波355nm用作激发和电离。

This approach uses the relative analysis to achieve the comparison of the Virtual Third Harmonic of differential current .

原理是利用相关分析间接实现差动电流虚拟 三 次 谐波比较。

Effect of amplitude modulation and phase perturbation on the optimizing parameters of third harmonic generation

振幅调制和位相扰动对 三 倍频参数优化的影响

The paper introduces the principle of PFC technique and its great significance puts stress on analyzing the mechanism of the third harmonic of input current .

：阐述了功率因数校正（PFC）技术的原理和意义；重点分析了输入电流的 三 次 谐波 产生机理。

The research of this article brings forward a new opinion for analyzing the third harmonic excitation system and providing strong theory base and strong rational and practical design schemes for the design and the research of synchronous generator of third harmonic excitation .

本文的研究结果为三 次谐波励磁分析提供了一种新的思路，也为 三次 谐波励磁发电机的设计和研究提供了坚实的理论基础和强有力的设计手段。

The Third Harmonic Generation in Asymmetrical Quantum Well Linear and Nonlinear Multipartite Entangled State Representation

非对称量子阱中非线性 三 次 谐波 特性研究线性及非线性多模量子连续纠缠态表象

The distribution of the third harmonic magnetic field in imported large rectifier transformer is analyzed . The reason of conductor damage in winding is discussed . The overheat possibility in primary winding is expounded .

分析了进口大型整流变压器 三 次 谐波磁场的分布，讨论了绕组导体绝缘损坏的原因，一次绕组存在过热的可能性，提出了可采取的改进措施。

The method for third harmonic generation of double wavelength and double pulse laser is proposed .

提出双波长双脉冲激光产生 三 次 谐波的方法。

According to this software a lot of electromagnet field calculation are made for no-load and load synchronous generator by third harmonic excitation .

利用该软件对 三 次 谐波励磁同步发电机空载和负载时的电磁场进行了大量的计算。

Furthermore we studied the characteristic of the third-order nonlinear ( TON ) interaction in the third harmonic generation .

在光束传输的基础上，我们还研究了 三 次 谐波转换过程中三阶非线性效应的作用及特点。

Besides the large amount of non-linear load results in third harmonic wave occurring in the distribution system .

而且非线性负载的大量使用使得变配电系统的 三 次 谐波十分严重，对配电中性线提出了加大面积的要求；

Direct and Cascading Third Harmonic Generation in Acentric Nonlinear Optical Crystals

无对称中心晶体中直接和级联 三 倍频效应

Third harmonic excitation has already become a common excited means for synchronous generator at present .

目前， 三 次 谐波励磁已成为同步发电机一种常用的励磁方式。

First the physical mechanisms of the third harmonic generation in air by a two-color laser field are studied . It is found that the third harmonic spectrum varies with the temporal delay chirp rate and the self-phase modulation of the fundamental and the second harmonic wave .

本文首先对空气中双色场飞秒激光泵浦产生 三 次 谐波的物理机制进行了理论研究，总结了时间延迟、激光脉冲的啁啾率和自相位调制效应给三次谐波频谱分布带来的影响。

According to the features of third harmonic excitation and the relationship between harmonic winding induction potential and amplitude coefficient the text approaches and analyzes the effect of the change of pole field waveform caused by the magnetic saturation ration on the harmonic winding induction potential .

根据 三 次 谐波励磁的特点，以及谐波绕组感应电势与谐波磁场幅值系数之间的关系，探讨分析了磁饱和度对磁极磁场波形的改变，从而对谐波绕组感应电势的影响。

Effect of charge density wave and spin density wave on the third harmonic generation in MX complex

MX络合物中电荷密度波和自旋密度波对 三 次 谐波产生系数的影响

Femtosecond Pulse-Second and Third Harmonic Generation with BBO

BBO晶体中飞秒脉冲的二次和 三 次 谐波振荡产生

And a new method named three-segment method is present to analysis harmonic winding no-load property curve for synchronous generator by third harmonic excitation .

并提出了一种分析 三 次 谐波励磁同步发电机谐波绕组空载特性的新方法&三段法。

For mastering on-load property of the third harmonic excitation system . Thus a new method to analyze harmonic winding no-load property curve of harmonic excitation synchronous generator named as three-segment method is presented in this article .

为了把握 三 次 谐波励磁系统的空载性能，本文提出了应用三段法来分析三次谐波励磁同步发电机谐波绕组空载特性。

This is particularly the case for the third harmonic which causes a sharp increase in the zero sequence current and therefore increases the current in the neutral conductor .

尤其是 第 三个 谐波，这将导致零序电流急剧增加，从而增加了中性线的电流。

Affected by electromagnetic transient process or will affect the quality of the output voltage to achieve the complete elimination of the effect of the third harmonic way to optimize the switching function .

电网运行过程中电磁暂态的影响，还是在一定程度上，对输出电压品质造成影响。笔者这里应用优化开关函数法，解决了从根本消除 三 次 谐波的目的。

Synchronous generator by the third harmonic excitation with the characteristics of self-excited constant-voltage and superior economy owns a wide range of attention and development .

谐波励磁同步发电机具有 自励恒压、经济性好的特点，得到了广泛重视和发展。