查询词典 harmonic wave

On the animated drawing a complex wave is resoleved into three simple harmonic waves with different frequencies and amplitudes.

该动画是由频率和振幅各不相同的三个简谐波叠加成复杂波的情形。

After the section of right side NXIIts in Budgerigar in the original sound wave\'s expanded time window, the higher amplitude pulse and the lower amplitude pulse exchanged alternately and also the higher amplitude is approximately as twice as the lower amplitude. The above outcomes show that NXIIts is most important in controlling the tone varieties and the numbers of the harmonic parts and the course of the vocal control maybe a process of alternative replacing.

NXlltS可能在控制其鸣声的音调变化以及影响其呜声的谐波数量上起到一定的作用，其控制区发声的过程很可能具有交替更换的特性。

To further improve frequency convener s performance,perfect phase-controlled theory and reduce voltage wave-shape s harmonic component,based on cosine interpenetration law the paper presents symmetry cosine law to better trigger points.

为了进一步改善变频器的性能，完善相控理论，减少输出电压波形的谐波成份，在余弦交截法的基础上，提出了用对称余弦法对触发点进行优化。

Earth tilt tide ; harmonic analysis ; tidal wave ; amplitude factor ;γ value anomaly

倾斜固体潮；调和分析；潮汐波；振幅因子；γ值异常

The study and application of the primary current limiting harmonic excluder for the type of the thermal resistor ;2. A recorder based on the thermal resistor s is used to monitor and record the state of the dielectric sample which is put into HV square wave life testing.

该仪器通过PTC 热敏电阻监测高压回路中限流电阻温度变化提取介质击穿信号，以单片机AT89c55为运算控制中心，采用热信号时间差分数字算法处理及控制信号。

In order to take account of the effect of magnet field harmonic,the phase winding loop model is usually used in square wave propulsive motor.

为了充分考虑磁场各次谐波的作用，方波推进电动机一般采用相绕组回路的数学模型，模型中绕组参数的测量和计算较为复杂，其中带阻尼绕组的多相永磁同步推进电动机的绕组电感测量和计算尤为困难。

ABSTRACT In this paper, some problems in harmonic free electron lasers and plasma wave wiggler FELs are investigated.

本论文对适用于应用的谐波自由电子激光和等离子体波泵Wiggler型自由电子激光中的若干问题进行了研究，对自由电子激光在材料科学领域的应用及应用。。。

The three-phase full-wave rectifier charging system is composed of 3 silicon-controlled rectifiers and 3 diodes, and a variable resistor is used to adjust the trigger level such that the power factor of generator can be raised, the current harmonic content can be reduced, and the operational efficiency of generator can be improved.

本研究之整流充电系统，为利用三颗矽控整流器和三颗二极体组成的三相全波矽控整流充电系统，利用VR可变电阻调整元件来做触发机能，可使发电机端功率因素提高，降低电流谐波含量，得到稳定的直流链电压，提高发电机的运转效率。

And then the output voltage harmonic for the single-phase three-level SPWM inverter under the half triangular and half saw-tooth carrier wave is studied. It also discusses how to select the carrier ratio N and the effects to the output wave by modulation ratio M.

着重对载波为半波、三角波、半波、锯齿波的单相三阶 SPWM逆变器的输出电压的谐波处理、载波比N的数值选择、调制比M对输出波形的影响等进行了研究。

The control signals of the PWM rectifier are obtained by comparing the current of AC side with triangular wave (or saw-tooth wave) directly, which can implement the steadiness of the voltage of DC side and unit capacity factor of the system. At the same time, harmonic component of the system is abstracted through Instant Reactive Power Method, which can be smoothed by Integrated Learning Boost Converter Control.

本文采用重复学习Boost变换技术，利用滑模变结构控制技术对单相PWM整流器恒频Boost变换进行了分析，提出将交流侧电流直接与三角波相比较得到开关控制信号的方法，实现直流电压恒定不变及系统单位功率因数；同时，利用瞬时无功功率法分析系统谐波，并在谐波域内使用重复学习的控制方法，结合Boost变换技术，有效滤除系统谐波有功电流。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。