次谐波

讨论了电网中非整次谐波的产生，以及现有的基于DFT（或FFT）的谐波分析方法在分析含该种谐波的电网畸变波形时存在的问题。

This paper discusses the subharmonic generation in the electric-network and the problems encountered in harmonic analysis by using FFT .

非线性元件次谐波运动的等效线性化

Equivalent linearization of a nonlinear element with respect to subharmonic motions

N次谐波凸轮的设计方法

The Design Method of a Cam with Nth - degree Harmonics

非对称式N次谐波顶置凸轮型线设计

The design of unsymmetrical OHC cam with nth - degree harmonics

N次谐波法拟合供油凸轮型线的探讨

Study for Nth harmonic method fitting fuel cam profile

二次谐波产生中光场振幅K次方压缩

The Amplitude kth-Power Squeezing of Light Field in Second Harmonic Generation Process

机端TV三次谐波电压及其对三次谐波保护的影响

Analysis of Third Harmonic Voltage Originated From Generator Terminal TV and Its Influence on Third Harmonic Protection

CO和CO2的1·58μm波段可调谐二极管激光吸收光谱的二次谐波检测研究

Second-Harmonic Detection with Tunable Diode Laser Absorption Spectroscopy of CO and CO_2 at 1.58 μ m

消除电网三次谐波三电平PWM变频调速装置

Three level PWM conversion speed - governing device

三次谐波系统动态行为的LYAPUNOV指数分析

LYAPUNOV Exponent Analysis of Dynamic Behavior in Third Harmonic Generation

基于FFT和神经网络的非整数次谐波检测方法

A new method for non-integer harmonics measurement based on FFT algorithm and neural network

并对这一类晶体的二次谐波发生和其亚结构单元[AH]+中N原子上的净电荷之间的依赖关系进行了估计。

The dependence of SHG on the net atomic charge of the N atom in the sub structural unit [ AH ] + is evaluated .

Li2B4O7晶体及二次谐波性能

Crystal Growth and Second Harmonic Generation of Li 2B 4O 7

分析了三次谐波注入PWM和电压空间矢量SVPWM的优越性和可靠性。

Analyze the superiority and reliability of three harmonic PWM and voltage space vector SVPWM .

一种使用一维电磁带隙结构的高性能Ka频段四次谐波混频器

Ka-band fourth harmonic mixer with 1-D EBG structure

包括考虑了相对论条件下的电子运动方程和反向辐射影响下的线路方程，以及高频电子流n次谐波的复振幅方程，并进行了归一化。

The equations include the circuitry equation considering reverse radiate and moving-electron equation considering relativity , and the complex amplitude equation of n harmonics in high frequency electron current .

Matlab平台上的仿真结果表明：该算法计算精度较高，对二次谐波有一定抑制作用，能较好地满足电力系统实时频率跟踪的要求。

Matlab simulation results show that the algorithm is suitable for instantaneous power system frequency tracking with higher accuracy and a certain suppression of second harmonic .

半波对称FFT算法针对半波对称性信号只含奇次谐波分量的特点，在算法流程中省去了偶次谐波分量部分。

The algorithm of half-wave symmetric FFT omits the even harmonics because the half-wave symmetric signals only have odd harmonics .

最后，为正在研制中的Ka波段三次谐波倍增回旋速调管放大器设计了一种链式群聚腔。

Finally , a chain bunching cavity is designed for the developing Ka-band frequency-tripling gyroklystron amplifier .

副族金属卤化物与POM的配合物的二次谐波效应与晶体结构的关系

Relationship Between SHG Effect and Crystal Structure in Complexes of Sub-Group Metal Halide and POM

探讨薄膜制备的工艺，及其各种处理条件下对薄膜性能的影响，采用Maker条纹法，测试薄膜样品的二次谐波。

Do the research about the process of the film preparation and the influence to the capability of the film under different conditions .

目的（1）应用经静脉声学造影间歇二次谐波成像（SHCI）结合声学定量（AD）技术评价正常移植肾血流灌注的可行性。

Objective To evaluate the clinical value of second harmonic contrast ultrasound ( US ) imaging and acoustic densitometry ( AD ) by comparing perfusion of renal allograft .

基于扩展Prony算法的电力系统非整次谐波分析

Power system fraction harmonic analysis based on prony algorithm

新型非线性光学材料Cd（POM）2Br2的二次谐波效应与晶体结构的关系

Relation of Second Harmonic Effect and Structure of New Nonlinear Optical Material Cd ( POM ) _2Br_2

介绍了一种Ka频段的微带四次谐波混频器的混频原理和设计方法。

This paper introduces the mixed theory and design method of a microstrip 4th harmonic mixer worked at Ka band .

用YAG∶Nd激光的三次谐波作激励光，我们在光纤维中观测了紫外受激喇曼散射。

Using the third harmonic radiation of a YAG : Nd laser Radiation as excited light , we have observed the ultraviolet stimulated Raman scattering in optical fiber .

金属有机配合物Cd（POM）2Cl2的二次谐波效应与分子结构、晶体结构的关系

Second Harmonic Effect and Molecular , Crystal Structure of a Organometallic Complex Cd ( POM ) _2Cl_2

二次谐波（SecondHarmonicGeneration，SHG）成像技术由于具有空间高分辨率、无需荧光标记，对生物样品的光损伤小，在介质中的穿透深度大等优点，在生物医学领域具有广阔的应用前景。

Second harmonic generation ( SHG ) imaging needs no fluorescent labels and brings no photobleaching or toxicity . It 's a promising tool for high-resolution , three-dimensional studies in biomedicine fields .

在第二章简要地概述了端面抽运固体激光器的速率方程理论、腔设计理论、抽运设计理论、二次谐波理论和调Q理论。

In the chapter 2 , rate equation theory , oscillator cavity designing theory , pumping designing theory , the second harmonic generation theory and Q switching theory are generalized .

利用反射二次谐波的传播理论及有限振幅波插入取代法给出了计算机重建B／A层析像的理论方法。

Based on the theory of propagation of reflected second harmonics and the insert-substitution method of the finite amplitude sound wave , the theoretical approach for computer reconstruction of B / A tomography in reflection mode is proposed .