... Phase of Shock Wave Harmonics in Focused and Unfocused Ultrasonic Sound Beams . ... We present experimental results from 2 plane and 2 focusing sound sources with frequencies near 1 MHz in water. ... For plane sources: after small fluctuations within the nearfield the phase parameter flattens out at a value near -pi/2, reaching a slightly more negative value with higher source amplitudes. ... They are more sensitive to the source amplitude than with the plane sources. ...
ft ra D DAYS on DIFFRACTION 2012 1 Theory of selfrefraction effect of intensive fo cused acoustical b eams V.A. Gusev Lomonosov's Moscow State University, Physical Faculty, Department of Acoustics, Russia, 119991, Moscow, Leninskie gori; e-mail: vgusev@bk.ru The theory of selfrefraction of nonlinear acoustical beams is developed based on some exact and approximate analytical equations and solutions. ... What is the main factor limiting the pressure in the focus -- diffraction or selfrefraction? ...
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Ссылки http://acoustics.phys.msu.su/teachers/gusev_files/diff2012.pdf -- 698.1 Кб -- 07.11.2012
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Ссылки http://acoustics.phys.msu.ru/teachers/gusev_files/diff2012.pdf -- 698.1 Кб -- 07.11.2012 Похожие документы
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... Potts-glass models of neural networks. ... FIXED POINTS OF PNN [pic] For any [pic], the only fixed points of a network constructed with the aid of two patterns [pic] and [pic] are these patterns themselves (and their negatives [pic]). [pic] Let us examine a case, when q = 2 and the vectors [pic] are without the signs [pic] (the signals are without the phase failure): [pic] As the neurons possess only one of the two values [pic] or [pic], formally this case is alike the Hopfield model. ...
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Ссылки http://acat02.sinp.msu.ru/presentations/litinski/litinski.doc -- 285.0 Кб -- 15.07.2002 Похожие документы