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2. Savitzky–Golay filter - Wikipedia

   en.wikipedia.org/wiki/Savitzky–Golay_filter

   The red line represents the local polynomial being used to fit a sub-set of the data. The smoothed values are shown as circles. A Savitzky–Golay filter is a digital filter that can be applied to a set of digital data points for the purpose of smoothing the data, that is, to increase the precision of the data without distorting the signal ...

3. List of Hewlett-Packard products - Wikipedia

   en.wikipedia.org/wiki/List_of_Hewlett-Packard...

   CM – HP Color LaserJet CMxxxx Multifunction printer; CP – HP Color LaserJet CPxxxx printer; D – HP Deskjet Dxxxx printer; D – HP Photosmart Dxxxx Single Function photo printer; F – HP Deskjet Fxxx All-in-One printer; G – HP Scanjet Gxxxx photo/flatbed scanner; K – HP Officejet Pro Kxxx color printer; M – HP Mono LaserJet Mxxxx ...

4. Hodrick–Prescott filter - Wikipedia

   en.wikipedia.org/wiki/Hodrick–Prescott_filter

   Hodrick–Prescott filter. The Hodrick–Prescott filter (also known as Hodrick–Prescott decomposition) is a mathematical tool used in macroeconomics, especially in real business cycle theory, to remove the cyclical component of a time series from raw data. It is used to obtain a smoothed-curve representation of a time series, one that is ...

5. Toner cartridge - Wikipedia

   en.wikipedia.org/wiki/Toner_cartridge

   A toner cartridge, also called laser toner, is the consumable component of a laser printer. Toner cartridges contain toner powder, a fine, dry mixture of plastic particles, carbon, and black or other coloring agents that make the actual image on the paper. The toner is transferred to paper via an electrostatically charged drum unit, and fused ...

6. Butterworth filter - Wikipedia

   en.wikipedia.org/wiki/Butterworth_filter

   The Butterworth filter is a type of signal processing filter designed to have a frequency response that is as flat as possible in the passband. It is also referred to as a maximally flat magnitude filter. It was first described in 1930 by the British engineer and physicist Stephen Butterworth in his paper entitled "On the Theory of Filter ...

7. Chebyshev filter - Wikipedia

   en.wikipedia.org/wiki/Chebyshev_filter

   Type I Chebyshev filters are the most common types of Chebyshev filters. The gain (or amplitude) response, , as a function of angular frequency of the th-order low-pass filter is equal to the absolute value of the transfer function evaluated at : where is the ripple factor, is the cutoff frequency and is a Chebyshev polynomial of the th order.