1) fifth harmonic
5次谐波
1.
On the basis of the characteristics of zero-sequence voltage and current at backward faulted branch,forward faulted branch and normal branch,this article analyses the fifth harmonic s amplitude and phase relation between the electric field and the magnetic field at the above-mentioned three kinds of branches.
该文根据故障点前向支路、故障点后向支路以及非故障支路的零序电压、零序电流的特点 ,分析了分布于这 3类支路周围的电场和磁场 5次谐波的幅值关系和相位关系。
2) second harmonic
二次谐波
1.
Ultrasonic nondestructive evaluation on bond quality of SRM interface based on second harmonic technique;
基于二次谐波技术的固体火箭发动机界面粘接质量的超声无损评价
2.
Theoretical and experimental research on the second harmonic of focused ultrasound in layered biological media;
聚焦超声波在层状生物媒质中的二次谐波声场的理论与实验研究
3.
Idler second harmonic generation in femtosecond BBO optical parametric amplification;
飞秒BBO光参量放大中闲频光二次谐波的产生
3) first harmonic
一次谐波
1.
To compensate of the nonlinearity error of heterodyne interferometers in nanometer measurement,a method for reducing the first harmonic nonlinearity is proposed.
为了补偿激光外差干涉纳米测量中的非线性误差,提出了一种减小非线性误差的一次谐波方法。
2.
If the frequency of a laser is modulated sinusoidally, the first harmonic component of saturated absorption signal can be used as error signal to stabilize the frequency of the laser.
对激光器进行频率调制,检测原子分子饱和吸收信号中的一次谐波成分得到频率误差信号,反馈控制可以实现激光频率的稳定。
4) higher harmonic
高次谐波
1.
Approach on Higher Harmonic Pollution and Harmonic Regulation in Power Supply System of Sugar Mills;
糖厂供电系统中的高次谐波污染及治理措施探讨
2.
The harm and restricting method of higher harmonic in power system;
电力系统中高次谐波的危害及其限制方法
3.
The theoretical analysis is made on the reasons why the aggrandizement of motor noise is caused by higher harmonic in the output of frequency converter, and why fan noise is induced by the resonance of carrier wave frequency and fan, and the solution scheme is put forward.
对由变频器输出中的高次谐波造成电动机运转噪声增大及载波频率与风机共振造成风机噪声的原因进行了理论分析,提出了解决方案。
5) third harmonic generation
三次谐波
1.
Study on the third harmonic generation induced by the second-order cascading in nonlinear photonic crystal;
光子晶体中二阶非线性过程产生三次谐波的研究
2.
4) were grown by Czochralski method and their critical phase matching angles of third harmonic generation (THG) of Nd∶YAG laser (1064 nm) were measured.
通过研究生长不同Gd离子和Y离子配比组份的GdxY1 -xCa4 O(BO3) 3晶体 ,得到了室温下可以实现非临界相位匹配产生 10 64nm三次谐波的新型非线性光学晶体Gd0 。
3.
The dual-tripler scheme for third harmonic generation(THG) is studied by the coupled equations under the small signal and high power condition((1.
5 GW/cm2)条件下研究了晶体串接三次谐波(THG)转换方案,并利用实验验证了该方案。
6) Second Harmonic Generation
二次谐波
1.
Fibrillar collagen(Collagen typeⅠand Ⅲ) in sinusoids of normal liver was successfully observed through second harmonic generation(SHG) microscopy.
方法:分别用前向二次谐波(SGH)及背向双光子荧光(TPEF)对肝脏标本的成纤维胶原(Ⅰ/Ⅲ)和肝细胞浆进行成像,将结果与传统的Masson’s三染色法进行比较。
2.
Since the second harmonic generation (SHG) signal is highly sensitive to the sym.
二次谐波成像是近年发展起来的一种三维光学成像技术,具有非线性光学成像所特有的高空间分辨率和高成像深度,可避免双光子荧光成像中的荧光漂白效应,是一种理想的非侵入生物活体成像方法。
3.
A new technique based on the second harmonic generation of the nonlinear optic effect for the measurement of the vector character of electric fields and the detection of freely propagating terahertz radiation is introduced.
利用非线性光学效应的二次谐波测定电场矢量以及THz电磁辐射场的新技术的方法,其有效性强,应用前景广阔。
补充资料：电力牵引高次谐波
电力牵引高次谐波
harmonics of electric traction
d Ionl一qlony旧gooe}x{ebo电j]牵引高次谐波(harmonies of eleetrietraction)整流式交流电力机车在整流过程中将引起交流侧电流、电压波形畸变，按傅立叶级数分析该畸变波形可分解成频率为基波频率整数倍的一系列高次谐波分量的叠加。 高次谐波电流、电压可引起下列不良影响: (1)对通信线产生杂音干扰影响; (2)引起电力系统中其他电力电容器设备的过负荷; (3)当电气化铁路负荷某次谐波电流频率与电力系统自身谐振频率相近时，可产生电流谐振，使该次谐波电流在电力系统中放大，危及电力系统安全运行; (4)使旋转电机、变压器、电力电缆的出力减少并产生过热，影响电气设备寿命; (5)造成继电保护误动或仪表读数误差; (6)使半导体开关元件换相失灵。 为限制谙波的危害，各国都规定了允许谐波含量的标准(见供电质童)。 为降低电力牵引负荷产生的谐波，在电力牵引变电所和电力机车中可装设由电容、电感组成的谐波吸收装置。交流一直流一交流电力机车利用电力电子技术，可实现低谐波分量的负荷特性，使谐波含量降低。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条