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The Hartley function is a measure of uncertainty, introduced by Ralph Hartley in 1928. If a sample from a finite set A uniformly at random is picked, the information revealed after the outcome is known is given by the Hartley function
In mathematics, the Hartley transform (HT) is an integral transform closely related to the Fourier transform (FT), but which transforms real-valued functions to real-valued functions. It was proposed as an alternative to the Fourier transform by Ralph V. L. Hartley in 1942, [ 1 ] and is one of many known Fourier-related transforms .
Ralph Vinton Lyon Hartley (November 30, 1888 – May 1, 1970) was an American electronics researcher. He invented the Hartley oscillator and the Hartley transform , and contributed to the foundations of information theory .
(This formula is sometimes called the Hartley function.) This is the maximum possible rate of information that can be transmitted with that alphabet. (The logarithm should be taken to a base appropriate for the unit of measurement in use.) The absolute rate is equal to the actual rate if the source is memoryless and has a uniform distribution.
In particular, the DHT analogue of the Cooley–Tukey algorithm is commonly known as the fast Hartley transform (FHT) algorithm, and was first described by Bracewell in 1984. [5] This FHT algorithm, at least when applied to power-of-two sizes N , is the subject of the United States patent number 4,646,256, issued in 1987 to Stanford University .
Hartley, 47, revealed that Pernas, 34, is just one of the guest stars who will return to future episodes of the CBS series, telling Collider on Wednesday, May 1, “[Sofia] is coming back. Jensen ...
Justin Hartley is a big fan of working alongside his wife, Sofia Pernas, on Tracker — and it comes with one serious perk. “I mean, I love carpooling. That's fun,” Hartley, 47, exclusively ...
Justin Hartley and Sofia Pernas. Michael Courtney/CBS Justin Hartley‘s wife, Sofia Pernas, will make multiple appearances on season 2 of his hit CBS series, Tracker. “She’s definitely coming ...