We've done this before-- this is the conservation of energy, and in order to find the period of the simple harmonic oscillation, we take the time derivative.
以前算过-,这是能量守恒，为了算出,简谐振荡的周期，我们求时间导数。
They are probably the result of even order harmonic distortion - a hallmark of the SET - that do not occur to any significant degree in the Densen amplifiers.
他们很可能是偶数阶谐波失真的结果-一个系列的标志-没有发生任何的电线放大器的重要程度。
The formula of harmonic torque of this motor is obtained and the characteristics of every order harmonics are discussed by adopting the principle of magnet coenergy.
采用能量法的观点，从宏观、总体的角度分析得出了电机的谐波转矩公式，研究了各次谐波的特性。
The year 2008 concluded a 5-year research project with the aim of neutralizing higher order harmonic distortion.
2008年签订了5年的研究项目，目的是消除高阶谐波失真。
In order to implement real time detection of harmonic voltage, a method for any harmonic voltage detection based on instantaneous reactive power theory was presented.
基于瞬时无功功率理论提出了一种任意整数次谐波电压的实时检测方法。
The effect on amplitude of EXAFS from harmonic caused by high order diffraction of crystal monochromator is discussed.
本文讨论了晶体单色器高次衍射形成的谐波对EXAFS振幅的影响。
In order to realize the functions of harmonic compensation and voltage regulation for nonlinear loads, a hybrid shunt active power filter is proposed.
为实现对非线性负载的谐波补偿和电压调节功能，提出了一种混合型并联有源滤波器。
Calculation results uncover the distribution order of power factor and harmonic current for 6k locomotive with the power factor compensator switched off.
通过计算，得到了未投入功率因数补偿装置时6K机车功率因数和谐波电流的分布规律。
The conditions for the production of amplitude-cubed squeezing in higher-order harmonic generation and an anharmonic oscillator are studied.
本文研究了高次谐波产生及非谐振子模型两种非线性光学系统中存在光场振幅立方压缩的条件。
If the stator inside winding is out of order, we must consider the influence of the harmonic wave with low orders or fraction orders when calculating the air space inductance values.
如在定子绕组内部故障情况下，气隙电感量的计算必须考虑低次和分数次谐波的影响。
Having established the mathematic model of a parallel active power filter, this paper has analyzed the generation of harmonic current order and the design of its current controller in detail.
对并联型电力有源滤波器建立了数学模型，详细地分析了在全数字控制下，谐波指令的生成和电流控制器的设计。
The most attractive one is high order harmonic generation (HHG), which can be used as a source of extreme ultraviolet (XUV) and soft X-ray lasers.
其中高阶谐振的产生，由于可以作为产生真空远紫外线和软X射线的可能途径，受到人们的极大关注。
In order to reduce total harmonic distortion factor of the inverter's output voltage, adding LC filter to inverter's output is a simple and practical method adopted extensively currently.
为了降低逆变器输出电压的谐波，简单且实用的方法是在逆变器的交流输出侧加装l C滤波器。
Theoretical derivation indicates that time averaged three-order cumulant of signals, which are from(random) phase harmonic processes, is nonzero and its one-dimension slice is also a harmonic process.
理论推导表明，随机相位谐波过程时间平均三阶累积量为非零值，而且其一维切片仍然是谐波过程。
The principal resonance of a second-order stochastic oscillator under combined harmonic and random parametric excitations is investigated.
研究了二阶线性系统在谐和与随机噪声联合作用下的主共振响应和稳定性问题。
The frequency stability, amplitude stability and harmonic content can be deduced from the second order perturbation solution of that equation.
方程的二阶近似解显示出非线性效应对振荡频率稳定度、振幅稳定度及波形正弦纯度的影响。
The result shows that it has the characteristic of high-stabilization , wide-regulation-range and it also could restrain the distortion of high order harmonic.
该稳压电源电路简单可靠、稳压性能好，对由高次谐波产生的纹波亦有很好的抑制作用。
This paper brief introduces the mechanism, damage and restraining method of high order harmonic.
本文简单介绍了高次谐波产生的机理、危害及有效抑制干扰的方法。
The completeness and higher-order squeezing properties of generalized odd and even coherent states of a Q-deformed non-harmonic oscillator are investigated.
给出了Q变形的非简谐振子广义奇偶相干态的完备性证明，并且研究了它们的高阶压缩特性。
Large amplitudes of cables can be induced by low order frequency harmonic oscillations. Then, some destructive accidents will happen, and some efficient control methods will be needed.
缆索结构系统在外部激励作用下将产生低频谐振，会导致大的振幅而可能有破坏性事故发生，故需要一种有效的方法控制这种振动。
This method may possibly be used to estimate influence of high order harmonic field on hysteresis loss to optimize the design of deflection yoke ring and to develop energy saving ferrite materials.
该方法适用于估测高次谐波场对磁滞损耗的影响，降低能量损耗的偏转系统磁芯结构的优化，磁性材料的选择等。
In order to make the optimal design of the ride performance, firstly, the modal analysis, the harmonic response analysis and the random vibration analysis are performed.
为了对载重车进行平顺性优化设计，本文首先对载重车进行了模态分析、谐响应分析、随机振动分析。
The harmonic pollution control is inevitable. In order to detect accurate harmonic content of the power system, the most important problem to solve is harmonic detection and analysis.
谐波治理势在必行，而首要解决的问题就是谐波检测和分析，确切掌握电网中谐波的实际情况。
In order to improve the power quality, Active power filter is used to compensate harmonic current of nonlinear load to decrease harmonic pollution of the grid.
为了提高电能质量，通常采用有源电力滤波器来补偿非线性负载的谐波电流，以减小谐波对电网的污染。
The method of harmonic balance is applied to study the non-linear dynamic response of the third-order nonlinear partial differentiation system.
应用谐波平衡法对系统三阶非线性微分方程组解析分析，与数值解比较验证了解析解的正确性和有效性。
In this paper, firstly, relations of first two harmonic induced velocities to the lower and same-order harmonic circulations are obtained from the generalized classical vortex theory of the rotor.
本文从旋翼的广义经典涡流理论出发，通过环量对诱导速度的贡献的简化处理，推导出旋翼诱导速度的二阶分布。
In this paper, firstly, relations of first two harmonic induced velocities to the lower and same-order harmonic circulations are obtained from the generalized classical vortex theory of the rotor.
本文从旋翼的广义经典涡流理论出发，通过环量对诱导速度的贡献的简化处理，推导出旋翼诱导速度的二阶分布。
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