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Linear Transformation A mapping between two vector spaces that preserves the operations of vector addition and scalar multiplication. Matrix multiplication(The dot product of a vector) Calculate how similar between X1 & X1, X2 & X1∙∙∙look. Linear combination of column vectors vector symbol

Fourier transform 내적(Dot product) : Calculate how similar the two signals are. 내적(x(t), 회전 함수) : The expression that how much frequency there are in x(t). ② Identify Signal Components. ③ Remove unnecessary frequency components. ④ Synthesize 3, it can obtain a signal with the high frequency noise removed. https://www.youtube.com/watch?v=YsG8fJsH9JE

Random Process The set of Random Variables. The process that a Random Variables is deployed in time. Ensemble Average Calculate the average with an infinite number of sample functions with fixed time. For example, choose a specific date and count the number of visitors to all parks on that day. (No. 1 is Haneul Park. No. 2 is Dosan Park...) Time Average The average of all times for a sample whic..

Bernoulli Trials A random experiments with exactly two outcomes. A real-life example of a Bernoulli trial is whether it will rain today or not. Now, the only possible outcomes are Yes and No and are independent of each other. Generally, the outcomes of a Bernoulli trial are success and failure.

Chi-squared Distribution It is the distribution of a sum of the squares of independent standard normal random variables. 1) "m" random variables are extracted "independent" from a set of random variables that follow a standard normal distribution. - extracted "independent" : The act of extracting one random variable does not affect the act of extracting the next one. Such as when extracting lott..