查询词典 harmonic function

It has practical value for power system harmonic analysis and harmonic restraint.

对于电力系统谐波分析和抑制具有很大的实用价值。

In order for analysis of the harmonic of arc welding power supply, a virtual harmonic analyzer has been developed.

基于弧焊电源谐波分析的需要，研制开发了一台弧焊电源谐波分析仪。

The first three harmonic components are measured by a frequency response analyzer with harmonic selector.

用带有谐波选择开关的频率响应分析仪测量了前三个谐波成份。

This paper refers to the related national standard and the domestic and foreign similar products technical specification and the practical application requirement, base on the existing harmonic analyzer, develops a new analyzer which bases on FFT harmonic arithmetic in software and DSP chip in hardware.

本文参照有关国家标准和国内外同类产品的技术指标和现场实际应用的要求，在现有谐波分析仪的基础上，研制了一种软件上基于快速傅里叶变换谐波分析算法，硬件上基于DSP芯片技术的分析仪。

The theory and application is explained in this paper. Software XMGREDIT5 matching ELCIRC is used to generate unstructured grid, and is considered fit for ocean but rivers. Tidal current is simulated and validated well, and sensitivity of current structure to bathymetry is visible. Affection of wind is qualitatively analyzed here. At the same time the model is improved on as required, like the tidal open boundary which could choose not only long period harmonic constant but also short period harmonic constant and tidal level, and multi-point results and flow field data could be exported effectively with binary results.

本文介绍了ELCIRC的理论及使用；基于其在Linux平台下的软件XMGREDIT5生成全三角形网格并评价其特性，认为XMGREDIT5较适合大范围海域而不适用于河道；应用ELCIRC模型计算了长江口的潮流场并进行验证，结果与实测资料吻合良好，且能较好地模拟出地形变化对水流结构的影响；文中对于风场的影响作了定性分析，同时根据实际需要对模型作了改进，如将仅支持长期资料调和常数的开边界条件改为可选择的短期调和常数边界和潮位边界，使二进制格式结果文件数据输出可以处理多点数据及流场等等。

Wusong Hydrological Station ; harmonic analysis of tide ; harmonic constant ; tide prediction ; astronomic tide

因此，准确预报黄浦江入长江口的吴淞站的风暴潮位至关重要

A quick and correct forecast of tidal current when oil spill occurs is a key step in the forecast of oil spill. Based on the harmonic constant of tidal component of M2, S2, O1 and K1 in Lingshan Island, Laoshantou and Chaolian Island, and by using harmonic method, the thesis first conducts a current forecast in a single point, and then builds up a current field forecast in Jiaozhou Bay and its adjacent seas. The computed results match well with the actual situation. The method reduces greatly the time of real time current forecast by not using numerical stimulation, so it fit to the two requirements of quickness and correctness in oil spill forecast system.

迅速准确地预测出溢油发生时的潮流情况是溢油环境预测的根本保证，因此文中根据灵山岛、崂山头和朝连岛三处M2、S2，、O1和K1四个主要分潮的调和常数资料，采用调和的方法进行单点的潮流预报，进而建立了胶州湾及邻近海域的预报潮流场；该方法的潮流预报结果与实际情况吻合良好，且因避开了数值计算过程而大大减少了流场实时预报的机时，符合溢油应急预报系统所要求的准确与快速。

The first harmonic winding and harmonic winding no-load property curve are gained when field current is change.

通过改变励磁电流的大小，得到了基波绕组和三次谐波绕组的空载特性曲线。

The hydrostatic harmonic friction-driving device is developed. The harmonic generator curve and drive ratio are analyzed and calculated.

首次设计研制了液体静压谐波摩擦传动装置，分析计算了波发生器的廓形及传动比，并进行了初步实验研究。

The wave of the harmonic winding voltage and the no-load characteristics curve of the harmonic excited synchronous generator.

得出了谐波励磁同步发电机的旋转磁场波形、谐波绕组电压波形以及谐波绕组空载特性曲线。

Fostering the concept of multi-culture firmly and mastering the development of advanced culture correctly are conductive to resisting terrorism, separatism of nationalities and ultraism of religion, which is of great academic theoretical, immediate and profound historical si...

牢固树立多元文化的理念和正确把握先进文化的发展方向，有助于在世界范围内自觉地抵制恐怖主义，民族分裂主义和宗教极端主义。不仅具有重大的学术理论意义，而且也具有重大的现实意义和深远的历史意义。

But if anyone walks in the night, he stumbles, because the light is not in him.

11：10 若在黑夜行走，就必碰跌，因为那光不在他里面。