查询词典 harmonic integral

Because a bulk smoothing capacitor is usually installed on the DC side of many AC to DC converters, the characteristics of harmonic loads will be influenced by this capacitor. Nowadays, shunt active power filters can't reduce harmonics effectively for this voltage type harmonic-producing load. Therefore, a series active power filter is designed to meet the requirements of voltage-sourced harmonic loads. Both source current and load voltage are detected in order to reach the compensation voltage for the SAPF.

由於许多交直流电源转换器均在直流端并联一直流电容以作为稳压之用，此大电容将造成负载谐波特性的改变；此类谐波源负载，如果使用现今常见的并联型主动式电力滤波器并不能很有效解决此类谐波问题；因此本文将采用串联型主动式电力滤波器，并配合同时量测电源电流及负载电压的混合式控制模式，即可有效解决此类谐波问题。

The mathematical methods to calculate the theoretical models of satellite magnetic anomalies, spherical harmonic analysis, spherical cap harmonic analysis, rectangular harmonic analysis and equivalent source method, were introduced in this paper.

本文介绍了计算卫星磁异常理论模型的数学方法，即球谐分析方法、冠谐分析方法、矩谐分析方法和等效源方法。

Based on the single-particle theory, we inspect the effects of harmonic wiggler field components on the outputs of free electron lasers (including the components of fundamental and harmonic frequecies), and derive the complete simulation equations for millimeter wave FELs. Meanwhile under the condition that the harmonic wiggler fields are much smaller than the fundamental one, we describe the effects simulated. Using the improved 3D WAGFEL code.

在单粒子理论的基础上，详细考察了摇摆场谐波分量对自由电子激光输出功率的影响，给出了完整的模拟方程组，并在摇摆场谐波振幅远小于其基波振幅值的假定下，利用三维WAGFEL程序和毫米波自由电子激光放大器的参数模拟计算了摇摆场谐波对自由电子激光基频输出功率的影响。

Then, aiming at harmonic current problem of single-phase circuit, I predigest the triphase instantaneous harmonic and reactive power theory to be used in detecting harmonic current of single-phase circuit.

然后，针对单相电路中的谐波电流问题，对三相的瞬时无功功率理论进行简化，使其应用于单相的谐波电流检测当中。

To reduce the influence of an unsynchronized sample sequence on FFT and improve the precision of harmonic in a power system, the harmonic estimation based on interpolation FFT algorithm is proposed. The estimation based on five coefficients of Rife-Vincent window is discussed in detail and the formulas for estimating harmonic patameters are deduced.

由于快速傅里叶变换在非同步采样时存在较大的误差，无法直接用于电力系统谐波分析，本文提出了一种基于五项窗Rife-Vincent插值FFT算法的谐波参数估计的新方法，并推导了其谐波参数估计公式。

Electric power system harmonic is one of the most important parameters. With the development of electric power and electron technology, a number of the nonlinear loads and all kinds of commutating equipments are widely applied in every walk of life, what they bring a mass of harmonic current make the content of harmonic increase in the power system and quality of power drop.

电力系统谐波是电能质量的重要参数之一，随着电力电子技术的发展，大量的非线性负载和各种整流设备被广泛的应用于各行各业，使电网谐波含量大大增加，电能质量下降。

The effect of pole-arc coefficient、 air-gap、 damper winding and magnet circuit saturation for no-load property of harmonic winding by it . So, in this article, we bring forward a new idea and method to analyze no-load property of harmonic winding of synchronous generator by third harmonic excitation.

根据三段法，分析了极弧系数、气隙、阻尼绕组和磁路饱和等因素对谐波空载特性的影响，为分析谐波励磁同步发电机谐波绕组空载特性提供了一种新的思路和分析方法。

High-order harmonic radiation with noble gas and N〓 in static gas target has been obtained, and the effects on high-order harmonic efficiencies due to laser intensities , polarization, gas densities, confocal parameter, media characteristic and phase mismatch have been discussed. The experimental results show that the high-order intensities grow with the incident laser intensities and gas densities, and high-order harmonic signals amplify in the same time.

高次谐波辐射是强场物理中与电离过程相伴而生另一种重要过程，本文利用飞秒激光在静态气室中获得全部的稀有气体原子以及氮双原子分子5到21次的谐波发射，着重讨论了激光功率密度、激光偏振、气体密度、共焦参数、介质本身以及相位失配对高次谐波转换效率的影响。

This paper describes the formation of the harmonic current in trolley wire and the developing process of the harmonic resonance, also the analysis of the transmission equation of the harmonic current.

本文叙述了接触网牵引电流谐波的产生及谐振过程，分析了谐波电流的传输方程。

The selective harmonic compensation based on FFT is proved effective to suppress the harmonic amplification by field operation of shunt APF compensating harmonic current generated by electric load in office building.

经过对办公楼负载的实际并网谐波补偿实验证明基于FFT的有选择谐波补偿方法对于抑制谐波放大是有效的。

As of Tuesday, Google's results were still censored in China.

截至周二，谷歌的搜索结果仍受中国审查。

In order to make the positive action increase and negative one decrease, the sub-forces of the social factors must be adjusted to form a centripetal force.

在这一过程中，人的主体性发挥是社会有机体健康发展的灵魂。