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Latest posts from topic “Trasformata di fourier” Latest posts from topic “Trasformata di fourier” on “ElectroYou”. 2016-11-04T13:24:58Z https://www.electroyou.it/forum/viewtopic.php?f=7&t=66481 Re: Trasformata di fourier https://www.electroyou.it/forum/viewtopic.php?f=7&t=66481#p678235 Fab996 2016-11-08T00:12:12Z 2016-11-08T00:12:12Z


Sono esattamente l'applicazione della regola di cui parlavamo sopra.


Ti ringrazio anche se non mi sono ancora esattamente chiari gli ultimi due passaggi.
Però l'antitrasformata faceva parte di un esercizio più grande.
[unparseable or potentially dangerous latex formula]; [unparseable or potentially dangerous latex formula]=-4\pi^{2}f^{2}, quindi calcolare l'antitrasformata [unparseable or potentially dangerous latex formula] con il metodo del campionamento avevo risolto l'esercizio e mi veniva [unparseable or potentially dangerous latex formula],
con ques'altro metodo invece dato che l'antitrasformata di [unparseable or potentially dangerous latex formula] è [unparseable or potentially dangerous latex formula], allora il prodotto in frequenza corrisponde a una convoluzione nel tempo [unparseable or potentially dangerous latex formula]
Re: Trasformata di fourier https://www.electroyou.it/forum/viewtopic.php?f=7&t=66481#p677754 Ianero 2016-11-05T17:23:02Z 2016-11-05T17:23:02Z
Come mai hai fatto la derivata seconda ?


Perché se derivavo una volta non avevo risolto il problema. Avresti saputo calcolare direttamente l'antitrasformata di f?

però non capisco gli ultimi due passi


Sono esattamente l'applicazione della regola di cui parlavamo sopra.
Re: Trasformata di fourier https://www.electroyou.it/forum/viewtopic.php?f=7&t=66481#p677728 Fab996 2016-11-05T15:09:03Z 2016-11-05T15:09:03Z
[quote="Ianero"]

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]


Come mai hai fatto la derivata seconda ? Poi hai calcolato l'antitrasformata della derivata seconda, però non capisco gli ultimi due passi[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]
Re: Trasformata di fourier https://www.electroyou.it/forum/viewtopic.php?f=7&t=66481#p677700 Ianero 2016-11-05T12:19:17Z 2016-11-05T12:19:17Z
[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]
Re: Trasformata di fourier https://www.electroyou.it/forum/viewtopic.php?f=7&t=66481#p677695 Fab996 2016-11-05T12:10:13Z 2016-11-05T12:10:13Z
[quote="Ianero"]E' uguale a parte un segno meno.
Basta ripercorrere la dimostrazione per la trasformata della derivata, con l'antitrasformata.


Scusa potresti farmi vedere quanto viene, che non riesco ad uscirne.. :cry: :cry: :cry:
Re: Trasformata di fourier https://www.electroyou.it/forum/viewtopic.php?f=7&t=66481#p677611 Ianero 2016-11-04T19:23:52Z 2016-11-04T19:23:52Z
E' uguale a parte un segno meno.
Basta ripercorrere la dimostrazione per la trasformata della derivata, con l'antitrasformata.
Re: Trasformata di fourier https://www.electroyou.it/forum/viewtopic.php?f=7&t=66481#p677503 Fab996 2016-11-04T14:52:59Z 2016-11-04T14:52:59Z
Esattamente ho la proprietà[unparseable or potentially dangerous latex formula]=[unparseable or potentially dangerous latex formula][unparseable or potentially dangerous latex formula], però non capisco come usarla, cioè se devo calcolare una trasformata basta che derivo nel tempo il segnale, calcolo la trasformata e poi divido per [unparseable or potentially dangerous latex formula]; però non capisco come fare invece se devo calcolare l'antitrasformata...
Re: Trasformata di fourier https://www.electroyou.it/forum/viewtopic.php?f=7&t=66481#p677475 Ianero 2016-11-04T13:38:11Z 2016-11-04T13:38:11Z
[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula] è l'operatore che effettua la trasformata di Fourier.
Re: Trasformata di fourier https://www.electroyou.it/forum/viewtopic.php?f=7&t=66481#p677472 Ianero 2016-11-04T13:29:25Z 2016-11-04T13:29:25Z
Deriva ;-)
Trasformata di fourier https://www.electroyou.it/forum/viewtopic.php?f=7&t=66481#p677471 Fab996 2016-11-04T13:24:58Z 2016-11-04T13:24:58Z
Mi aiutereste a calcolare l'antitrasformata di questa funzione attraverso il metodo della derivata ? [unparseable or potentially dangerous latex formula]