When zero sequence or high secondary harmonic current component appear in the circuit , the total current in the shield is zero , no electromagnetic interference with outside 当线路出现零序或高次谐波电流分量时，屏蔽层内电流总和为零，不对外界产生电磁干扰。
3 the effective value of a non sinusoidal periodic function is equal to the square root of the square sum of the constant component value and every harmonic component effective value 非正弦周期函数的有效值等于直流分量与各次谐波分量有效值的平方和的平方根。
" the crystal resonator " . a subharmonic of the frequency of quartz crystal . extremely effective for charging and clearing quartz crystals . activates aspects of the auric field “水晶共振”次谐波频率的石英水晶。非常有效去充电和清除石英水晶。启动有关灵光场。
Carrier frequency leakage less than - 40db can be attained since good agreement of the two diodes antiparalleled in even - harmonic mixer is guaranteed inherently 在简化载波信号产生电路的同时，利用偶次谐波混频器固有的本振偶次谐波高抑制度特性，来抑制载波泄漏。
In this paper , we analyze three kinds of typical harmonics in power system . the main method of monitoring of high harmonics is depicted 本论文首先系统的论述了国内外电力网谐波的产生及其危害，以电力系统中主要出现的三次谐波为例，论述了对谐波进行监测的必要性。
In addition , the time - width of pulse also influences hhg . to some extent the spectrum of hhg will become be tter when the time is prolonged 另外，激光脉冲时间的长短也会影响到高次谐波的性质，在一定范围内，随着脉冲时间的加长，电离率逐渐增大，谱线结构也越来越明显。
In laboratory , this system has fulfilled the measurement of simulant large current and high voltage , with the precision better than 1 % to the fundamental wave 在实验室中成功测量了模拟大电流与高电压，基波测量精度优于一级，对其它各次谐波的测量精度满足国家标准要求。
This approach doesn ' t require synchronized sampling and integer period truncation , and can obtain directly the frequencies , amplitudes and phases of fundamental waves and harmonics 该方法不需要同步采样和整周期截断，可一次性获得电力系统基波及各次谐波的频率、幅值和相位。
The apace vector pwm has the character of wide linear range , little higher harmonic and easy digital realization , so it is being widely used in pmsm driver system 摘要空间矢量pwm调制，它具有线性范围宽、高次谐波少、易于数字实现等优点，在新型的永磁同步电机驱动器中得到了普遍应用。
The method for third harmonic generation of large - aperture high - power solid laser is described which is the second nonlinear effect of two cascade crystals in this paper 摘要叙述了大口径高功率固体激光器，利用两块级联晶体的二阶非线性效应，对激光输出进行谐波转换，实现三次谐波输出的方法。
