查询词典 harmonic component

A key point in Short Time Fourier Transform is the choice of window function. Although rectangle window is regarded as the first choice because it's featured by integral harmonic to filter signals and by DC component, decaying DC component and frequency shift of signals cause great error to rectangle window STFT. In addition, transient signals contain rich information of faults, but the fixed time window of STFT fail to collect these information.

STFT 算法关键问题之一是窗函数的选择，矩形窗以滤除信号整数次谐波和直流分量的特点自然称为首选窗，但衰减直流分量和信号的频率偏移对矩形窗 STFT 造成了很大误差；其次，暂态信号中含有丰富的故障信息，傅立叶变换固定的频窗忽略了这些特征信息。

Converting the three-phase current coordinate by d-q transformation,picking out the fundamental active component,then the harmonic and reactive component was detected.

通过d-q变换对三相电流进行坐标变换，提取其基波有功分量，从而检测出其谐波与无功分量。

event record ; standard COMTRADE ; harmonic component ; sequence component ; impedance locus

组态文件可由计算机程序来识别，因此它必须具有特定的格式。组

Harmony ; ancient plain harmonic beauty ; recent-times loftiness of opposite ; ugliness ; absurdness ; modern dialectically harmonic bea

和谐；古代朴素和谐美；近代对立崇高；丑；荒诞；现代辩证和谐美

The main circuit of the direct voltage type SVC consists of the autotransformer with average voltage, fixed branch which can compensate the reactive power and filter the harmonic, dynamic branch which can compensate the reactive power and filter the harmonic, capacitive AC thyristor no contact switch and the measuring and controlling system of

自耦均压变压器作为SVC中的主要器件，本文通过变压器的短路试验以及编程进行多项式拟合，建立了其漏抗随电容器组投切级数变化的数学模型，进而做了自耦均压变压器与相同容量相同变比的双绕组变压器有功损耗的比较，分析了36抽头自耦均压变压器在一组电容器全部投运时的空载特性，并对SVC的静态性能进行了全面分析。

Electronic equipment produces busywork and harmonic components that not only increase unnecessary loading and power consumption in public power equipment. But also harmonic components insert into public power system that causes deteriorating of power quality. Risks increase into break and mistake of precision instrument.

而电力设备所产生的虚功与谐波不仅无谓的加重公用电源设备的负担，增加无谓的功率消耗，更因为谐波成份的加入而使得电源品质恶化，增加精密设备损坏与误动作的风险。

To solve this problem, an algorithm to analyze and research the multi-harmonic sources was proposed based on certain assumptions, and the calculation formulae of harmonic superposition were deduced based on Big Number Theorem and Central Limit Theorem of probability statistics.

针对这一问题，论文在一定假设条件下，提出了一种研究多谐波源谐波电流叠加的方法，利用概率统计学中的大数定理和中心极限定理，推导出了谐波叠加的计算公式。

Thirdly, a new type base isolation system, i. e., slide-limited friction base isolation system is presented in this paper. Based on this system, harmonic and subharmonic periodic response of S-LF subjected to harmonic motion is investigated by using Floquet theory. Dynamic response of sliding structure subjected to earthquake ground motion is calculated with a precise high order direct integration method, and the numerical results are presented in terms of maximum acceleration response spectra of supcrstructure and maximum sliding displacement response spectrum. By comparison with isolating effects of pure-friction base isolation system and resilient-friction base isolation system , it shows that the isolating characteristic of S-LF is superior to P-F and R-FBI. Through analyzing an engineering example, it is observed that the maximum inter-storey shear force and absolute acceleration of sliding structure to earthquake ground motion are very different from those of traditional structures.

提出了一种新型基础隔震模型，即带限位装置的摩擦隔震体系；基于此隔震模型，利用Floquet理论研究地面谐运动下S-LF结构的运动特性；并利用高精度的精细时程积分法，通过对地震作用下S-LF动力响应的计算，绘制了上部结构最大加速度反应谱和基底最大滑移量反应谱，并研究了各种结构参数对隔震的影响；通过与恢复力摩擦隔震系统和纯摩擦力滑移隔震系统的比较表明，S-LF的隔震性能优于P-F和R-FBI；对计算实例的分析发现，地震作用下S-LF结构的层间最大剪力和最大绝对加速度反应分布较一般传统结构有很大区别。

In this paper, complex valued harmonic conjugate function is defined, Cauchy Riemann equations of complex valued harmonic functions are considered.

定义了复调和函数的共轭复调和函数，给出了复调和函数的Cauchy—Rie－mann方程，同时讨论了它们与解析函数之间的关

Installation, test and practical measurements of the whole system also have been implemented. Studied the various methods of digital monitoring dielectric loss for transformer bushes: harmonic analysis method. Sine-shape parameters method and integration method, states the principles of the three methods, its computational formula has been inferred and compared. Among them, harmonic analysis method was used to test practically both in lab and on site.

研究了变压器套管介质损耗的数字化监测方法：谐波分析法、正弦波参数法和积分法，论述了三种方法的监测原理，详细推导了各种方法的计算公式，比较了各种方法的优缺点，并采用谐波分析法在实验室和现场进行了测试，其结果表明该方法在介损测试中具有较高的稳定性和准确性。

The production moved off-Broadway to New York City, where she won the Joseph E. Calloway award for her performance, and was profiled in American Theater Magazine as one of ten young theater artists to watch.

生产提出过百老汇的新的纽约市，在那里她赢得了约瑟夫calloway奖，她的表现，并于异型在美国的战区杂志之一， 10战区的青年艺术家观赏。

It's a risk tradeoff, and I believe that adding test support code usually wins.

这是一个风险的权衡，我相信添加测试代码通常会占上风。