正弦波

Q: Why it shows lower than 220V while we measure the Quasi-sinusoidal wave inverters by normal multimeter?

问：为何使用普通万用表测量准正弦波车载逆变器的交流输出时，显示的电压比220伏低？

A Precise Evaluation Method of Sine Wave Phase Difference.

正弦波相位差的一种精确评价方法。

He was studying then in Paris with Messiaen and Milhaud, but preferred to hole up in studios playing with tapes and sine waves.

那时，施托克豪森在法国巴黎与梅西安和大流士？米约一起学习，但他更喜爱自己独自待在录音棚研究录音带与正弦波。

These two sinusoids are nearly out of phase .

这两个正弦波几乎是反相的。

The output voltage of power supply is AC sinusoidal wave. When the sinusoidal peak-to-peak applied voltage is about 9kV and its frequency is about 10kHz, the APSGD will appear, and the luminescence thickness of plasma is less than 1mm. This experiment result agrees well with the calculated results.

实验中电源输出的电压波形为交流正弦波，在峰-峰值电压为9kV时发生沿面辉光放电的电压频率为10kHz，同时等离子体发光厚度低于1mm，上述实验结果较好得验证了理论计算的结果。

Phase angle refers to the relation between two sine waves which do not pass through zero at the same time.

相角 ：相角指的是两个不同时经过零点的正弦波之间的关系。

Phase Angle Phase angle refers to the relation between two sine waves which do not pass through zero at the same time.

相角 相角指的是两个不同时经过零点的正弦波之间的关系。

Pulsar signals are expected to be sine waves, like the one shown below.

脉冲星信号应该被看作是正弦波，如下图所示。

Through the interferencing light intensity under a sine-wave modulation signal analysis, the output signal of fiber-optic gyroscope is demodulated. And then the change of the output signal of gyro is gotten. Through the analysis of the change we know that the effect of residuary intensity modulation on the performance of Interferometric Fiber Optic Gyroscope is related with the precision and accuracy requirements of IFOG. The higher precision, the more obvious effect.

本文首先通过正弦波调制下干涉信号光强分析解调出光纤陀螺的输出信号，进而得出残余强度调制存在的情况下陀螺输出信号的变化情况，同时，通过分析陀螺信号的变化说明残余强度调制对光纤陀螺性能的影响与陀螺精度要求有关，精度越高，其影响越明显。

Thanks to this scheme, the phase, root-mean-square value, frequency, and waveform of the output sinewave voltage can be controlled precisely and the system has excellent steady-state performance, fast dynamic response performance, fast and reliable current cut-off protection function.

提出了一种新的适应"模块化"要求的高性能逆变电源控制方案，该方案是一种带有输出电压相位控制及负载电流前馈控制的多环反馈控制方案，能对输出正弦波电压的相位、有效值、频率、波形进行精确控制，使系统具有良好的稳态、动态特性以及快速可靠的截流保护功能。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。