Zobrazeno 1 - 10
of 98
pro vyhledávání: '"Valentin A. Burov"'
Publikováno v:
Bulletin of the Russian Academy of Sciences: Physics. 83:59-63
A procedure is described for reconstructing separately the spatial distributions of the absorption coefficient, speed of sound, and the intrinsic temperature of an investigated object by means of acoustic thermotomography. The use of radiation focusi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6074c669cd4bf3d574efd63937531f2
https://doi.org/10.3103/s1062873819010052
https://doi.org/10.3103/s1062873819010052
Publikováno v:
Bulletin of the Russian Academy of Sciences: Physics. 83:64-69
Different ways of coding radiated signals that probe a tomographized object such as a liquid medium are compared in order to reconstruct the spatial distribution of acoustic nonlinear parameters using a small number of transducers. The results from r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::960fcc919fde399b83639cf441ee8f89
https://doi.org/10.3103/s1062873819010131
https://doi.org/10.3103/s1062873819010131
Publikováno v:
Moscow University Physics Bulletin. 73:470-474
An algorithm for estimating the geometrical and phase corrections for receiving–transmitting transducers of a ring antenna array of an ultrasonic tomograph is proposed. These corrections should be taken into account at the stage of the reconstructi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b661df503c40217b1a2f475e945b3978
https://doi.org/10.3103/s0027134918050077
https://doi.org/10.3103/s0027134918050077
Publikováno v:
Acoustical Physics. 64:590-595
A possibility to create controlled anisotropic illumination in an acoustic tomographic system with correlation processing of experimental data is considered. Fundamental difficulties encountered in setting up anisotrpic illumination in a ring array s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a59dd17148639a49731bdc28e7a8b03
https://doi.org/10.1134/s1063771018040036
https://doi.org/10.1134/s1063771018040036
Publikováno v:
Bulletin of the Russian Academy of Sciences: Physics. 79:1468-1472
The paper considers a tomography scheme based on nonlinear interaction of three noncollinear primary waves and discusses how a signal appearing due to double second-order interaction affects estimation of the acoustic nonlinear parameters of a studie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d54a10b5ad1d77fce1f110651fc3dd18
https://doi.org/10.3103/s1062873815120114
https://doi.org/10.3103/s1062873815120114
Publikováno v:
Bulletin of the Russian Academy of Sciences: Physics. 79:1473-1476
The paper considers the possibility of reconstructing shallow-water characteristics using passive tomography. We use time-frequency analysis of the noise cross-correlation function obtained from single hydrophones in the studied water area. We presen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de30706d5682cd74a344fa2f9f496c7f
https://doi.org/10.3103/s1062873815120126
https://doi.org/10.3103/s1062873815120126
Publikováno v:
Acoustical Physics. 61:636-650
In order to study the practical possibilities of acoustic nonlinear tomography, the paper describes wave generation processes caused by purely third-order nonlinear interaction and second-order double interaction. The occurring nonlinear secondary so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::04dc46693b0982e5eb65c2c7ce61ecb3
https://doi.org/10.1134/s1063771015060032
https://doi.org/10.1134/s1063771015060032
Publikováno v:
Bulletin of the Russian Academy of Sciences: Physics. 79:1257-1262
The scheme of an experimental setup for the focused acquisition of thermal—acoustic fields with their subsequent correlation treatment is proposed. The signal-to-interference ratio is evaluated for this scheme and the results from experiments on co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4be3790cb21070520cd26d85d832c9fa
https://doi.org/10.3103/s1062873815100081
https://doi.org/10.3103/s1062873815100081
Publikováno v:
Acoustical Physics. 61:534-546
The paper examines the possibility of applying mode tomography methods to reconstruct shallow-water bottom characteristics using as an example joint reconstruction of the bottom relief and the sound velocity in the bottom. It is shown that the differ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6bc742610ddf153c0543c42dbd81c072
https://doi.org/10.1134/s1063771015050061
https://doi.org/10.1134/s1063771015050061
Publikováno v:
Physics of Wave Phenomena. 23:135-142
The possibility of simultaneous reconstruction of the blood flow velocity vector and spatial distributions of the speed of sound and absorption coefficient in a medical ultrasonic tomograph is discussed. The operating capacity of the proposed spatial
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e40b74332db8b58e5b51937e032963b
https://doi.org/10.3103/s1541308x15020090
https://doi.org/10.3103/s1541308x15020090