Pcm Definition and 11 Threads

  1. D

    A Heat exchange in a thermal storage based on phase change materials

    Hello, I want to model a thermal battery based on phase change materials (PCM). It is a plate heat exchanger immersed in a PCM bath. The diagram is given in the attached file. I want to determine the temperature at each moment and from everywhere in the battery. The hypotheses are the...
  2. entropy1

    B Mixing two discrete audio signals

    Suppose I have two audiofiles in 16 bit PCM, both recorded on a level that, except for the noise and distortion, is maximally recorded, or that the maximum recording level results in the maximum PCM level. So, the signal is recorded on the maximum level such that there is no clipping. If we...
  3. J

    Why is the bandwidth in PCM half of the transmission rate?

    When we use pulse code modulation , it is said that the min bandwidth requirement is half the transmission rate. Transmission rate given in Bits/sec. But why?
  4. Domenico94

    How Do You Solve the PCM System Quantization Problem from Leon Couch's Book?

    Homework Statement Hi everyone. I was trying to solve an exercise from the book Leon couch, communication systems, number 3.7 of the 6th edition. This is the statement: In a PCM binary system, the quantisation noise mustn t exceed the percentage value P of the peak power. Show that the...
  5. Hare Krishna

    Refrigeration with PCM (phase change material)

    Can we really reduce the compressor work by adding phase change material in evaporator. theoretically, it looks that it'll work but still confusion remains...
  6. E

    Discovering a Unique PCM: High Volume Change, Low Heat Storage Capacity

    I'm trying to find a Phase Change Material (PCM), but the entire industry is pretty one-minded when it comes to what it should be used for - energy storage. You can see by the wording of the Wikipedia article: https://en.wikipedia.org/wiki/Phase-change_material that they list advantages like...
  7. G

    Digital Transmission and Twisted Wires

    Homework Statement I am currently embarking on a project where I have to build a communications system which can take in an analog voice signal, translate it into digital signal, and send it across to the receiver where the original voice gets recovered and it can be played back using a...
  8. R

    How calculate a single frequency of a multifrequency signal?

    I'm just coding a program where I've to calculate the individual frequencies inside an audio file *.wav file. The modulation is pcm and the information I've is a lots of points, like this: http://www.renesas.com/media/support/faqs/faq_results/Q1000000-Q9999999/samp_1.gif To be exact, I've...
  9. C

    PCM wax freezing outside solid, inside liquid

    A colleague and I want to model how a slab of PCM (wax) solidifies as it cools off. What I have noticed in my experiments is that temperature sensors on the top and bottom of the slab say it should be solid, as they read well below the melting point. But when I peek at the sample, the center...
  10. sankalpmittal

    Career Help for PCM Students in Class 10th

    Hey , I am Sankalp in class 10th , 14 years . I have been thinking of carrier in Physics , chemistry and maths , especially engineering . Which is of more importance in carrier by giving entrance examinations : Practice of numericals or good analytical research oriented theoretical concepts .In...
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