Introduces the concept, application and discrete Fourier transform algorithm of Fourier Transform.
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Orthogonality of the system of trigonometric functions:
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https://ocw.chu.edu.tw/pluginfile.php/861/mod_resource/content/14/Summary_259.pdf
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0:00 Introduction
1:00 Applications of Fourier
2:08 The difference between time domain and frequency domain
3:16 Frequency Domain
6:53 The history of Fourier
7:47 Fourier algorithm
11:40 Vector inner product
13:51 Number of frequency dimensions
16:25 Frequency dimension completed
19:05 Frequency Spiral Wave
19:52 Redraw tracing
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