The Endocrine System Essentials. 1  The endocrine system is made up of a network of glands. 2  These glands secrete hormones to regulate many bodily functions, including growth and metabolism. 3  Endocrine diseases are common and usually occur when glands produce an incorrect amount of hormones.
What is a Fourier Series used for? Answer Wiki. The Fourier Transform is used to convert a continuous, periodic time domain signal, into the relative, instantaneous energy contained in the signal, across the entire frequency spectrum, and for *every* moment in time. This is what we call the frequency domain representation of that signal we started with.
after Fourierâs work that the signals did not have to be continuous in the time domain but. could instead be discrete data points. This led to the inception of the discrete-time. Fourier series and the discrete-time Fourier transform [2]. Four different Fourier representations exist: 1. Fourier series (FS) 2. Fourier transform (FT) 3. Discrete-time Fourier series (DTFS) 4. Discrete-time Fourier transform (DTFT) The discrete-time Fourier series that this chapter will primarily focus on is often referred to as the discrete Fourier transform, or DFT. This terminology is not to be confused with the discrete-time Fourier transform. The factor that determines whether to use a series or a transform is periodicity in