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Publikováno v:
Materials; Volume 16; Issue 13; Pages: 4739
In nonlinear ultrasound testing, the relative nonlinear parameter is conveniently measured as a sensitive means of detecting and imaging overall variation of microstructures and damages. Compared to the quadratic nonlinear parameter (β′), the cubi
Publikováno v:
Materials; Volume 16; Issue 12; Pages: 4453
Harmonic generation measurement is recognized as a promising tool for inspecting material state or micro-damage and is an ongoing research topic. Second harmonic generation is most frequently employed and provides the quadratic nonlinearity parameter