id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ap-606	Matz, V.; Kreidl, M.; Šmíd, R.	Signal-to-Noise Ratio Improvement based on the Discrete Wavelet Transform in Ultrasonic Defectoscopy	2004	6	.pdf	application/pdf	2372	119	60	(2) DWT coefficients are usually sampled from the CWT on a dyadic grid, choosing parameters of translation � � �n m2 and scale s m�2 , it is possible to defined mother wavelet in DWT as: � �m n m m mt t n , ( ) � �� � � � � � 1 2 2 2 . An important requirement on ultrasonic signal filtering is zero-time shift, because the position of ultrasonic echoes is essential.	cache/ap-606.pdf	txt/ap-606.txt