National Repository of Grey Literature 100 records found  beginprevious91 - 100  jump to record: Search took 0.01 seconds. 
Kalibracni vzorky pro nelinearni ultrazvukovou spektroskopii
Převorovský, Zdeněk ; Van Den Abeele, K.
The experimental procedures are described, based on nonlinear elastic wave spectroscopy (NEWS). Special testing samples - PMMA blocks with laser induced cracks - are designed to verify that procedures. Opening of cracks enables kissing effect of their faces at relatively small amplitude of dynamic excitation which plays substantial role in Nonlinear Wave Modulation Spectroscopy method (frequency mixing) where it causes creation of side lobes in frequency spectra.
Korekce parametrů signálu AE pomocí neuronových sítí
Chlada, Milan ; Převorovský, Zdeněk ; Vodička, Josef
In the contribution, the new approach for conversion of signal parameters, evaluated at various transducers, to one reference location in source vicinity is described. This reduced inverse problem is solved using artificial neural networks.
Wavelet transform utilization in dispersive laser-generated ultrasound signal processing
Blaháček, Michal ; Převorovský, Zdeněk ; Landa, Michal
New method of dispersion curves construction using experimental data is discussed in the paper. The method is based on CWT transform utilization.

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