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MATLAB : Fourier transform

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By Nuno Nogueira, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=3912826 MATLAB has been  crucial programming language across worldwide that let us express matrix and array mathematics directly. In signal processing and communication it plays vital role in analysing and exploring time series data in time domain or frequency domain. For analysing non periodic signals in frequency domain we use Fourier transform instead of Fourier series ,which is used to express periodic signals in terms of infinite sum of sinusoidal terms .   Fourier transform can exist for :      1. Energy signals      2. Power signals       3. Impulse signals  That means absolutely integrable signals can have their Fourier transform only.  Formula for Fourier transform;   Then its come to use Fourier transform in MATLAB. So here is the code for Fourier transform of sinusoidal wave , for any other signal we ...

The microchip that can smell!

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"Necessity is the mother of invention".All the inventions and discoveries are the result of human needs. In this series of inventions here we are discussing a chip that can smell! Wait for a minute and think, what if your PC smells the odour and also gives you an idea about the source of odour! A PC with a nose. A chip can do lots of things but still, the "brain" of computing systems falls short when it is compared to the human brain. But now, through the science of neuromorphic computing, researchers from Intel and Carnell University have developed a chip which can smell! It's more of a digital recreation of the nose. The algorithm helps the chip work the same way as the human brain. The chip is able to identify and learn the smell. It is not like a typical silicon chip, It is neuromorphic, describing the use of large-very-scale-integration (VLSI) systems containing electronic analog circuit to mimic neuro-biological architecture present in the ...