Is the scalar wave phenomenon real, and if so, why is it not much …
2015年3月16日 · Besides above there are also university professors giving lectures on scalar waves. Here is a video of Gregory Durgin at Georgia Tech giving a lecture on scalar waves: WAV02: The Scalar Wave Equation (48min 54sec) And here is a video of Jamesina Simpson at University of Utah: FDTD Lecture 1a: Scalar Wave Equation (Setting up the Problem) (10min ...
What exactly are harmonics and how do they "appear"?
2012年5月21日 · Sinusoidal waves don't have harmonics because it's exactly sine waves which combined can construct other waveforms. The fundamental wave is a sine, so you don't need to add anything to make it the sinusoidal signal. About the oscilloscope. Many signals have a large number of harmonics, some, like a square wave, in theory infinite.
power electronics - SPWM vs 6-step PWM vs SVMPWM - Electrical ...
2019年2月3日 · While learning 3-Phase scalar control of ACIM using STM32F407 MCU I could not clearly understand the diffrence between the following terms: 1. SPWM 2. 6-step PWM 3. SVMPWM How do they differ from ...
math - Why V rms instead of V average? - Electrical Engineering …
The same applies to any real world signal (by this I mean imperfect - not pure AC) as Fourier series says that any wave can be replaced by a correct combination of sine and cosine waves and since the frequencies of the waves are higher (integer multiples of the base frequency) they too get cancelled out, isolating the DC component.
Why do higher frequency waves have better penetration?
What you are apparently thinking of is wavelengths so short that the energy is very high, like xrays and gamma rays. These go thru things solely because of their high energy. At lower energies (longer wavelengths), the waves interact with the material in various ways so that they can get absorbed, refracted, reflected, and re-emitted.
rf - How exactly are radio waves produced from a current in a …
Radio waves are produced when the electric field rapidly changes: there has to be an alternating current. An electric field spreads out into space. When you change an electric field, the distant parts of it do not change instantly.
What is the relation between FFT length and frequency resolution?
So the computer calculates the cosine of the a -scalar- time value, x harmonic order x 2 pi. Let's assume a sampling rate of 1kHz; this means that you get one value (voltage, usually) every 1 ms. If we set the bins number to 200, then the longest cosine that is created has a temporal length of 200 x 0.001 = 0.2 s, thus its period is 0.2s, thus ...
voltage - Is a square wave still considered DC? - Electrical ...
2014年5月29日 · A.c voltage goes beyond 0v to the negative plane you have an alternating current a.c 0v, full voltage positively 0v and negative full voltage back to 0v one complete cycle ac waves can be rectified to be perfectly sinusoidal wave commonly referred to as a sine wave.
Why do oscilloscopes have such high sampling rates when the …
2020年9月22日 · For square waves, we usually take the frequency to be one period of the square. However, that's not the bandwidth! To get a good feeling of the bandwidth, we'd need to see many harmonics of the square wave.
cpu - Difference between superscalar and multi-core? - Electrical ...
2012年10月12日 · A scalar processor executes at most one instruction per cycle, super-scalar means it can potentially execute more than one instruction per cycle. For example, if the processor has a functional unit for integer arithmetic and another for floating point then why not use both at the same time to execute two instructions simultaneously.