The concept of a transform is familiar to mathematicians. It is a standard mathemti-cal tool used to solve problems in many areas. The idea is to change a mathematical quantity (a number, a vector, a function, or anything else) to another form, where it may look unfamiliar but may exhibit useful features. The transformed quantity is used to solve a problem or perform a calculation, and the reult is then transformed back to the original form.
KeywordsFrequency Domain Periodic Function Discrete Fourier Transform Sine Wave Intensity Function
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