Zobrazeno 1 - 10
of 225
pro vyhledávání: '"Karim G, Sabra"'
Autor:
Jihui Jin, Priyabrata Saha, Nicholas Durofchalk, Saibal Mukhopadhyay, Justin Romberg, Karim G. Sabra
Publikováno v:
The Journal of the Acoustical Society of America. 152:3768-3788
Underwater sound propagation is primarily driven by a nonlinear forward model relating variability of the ocean sound speed profile (SSP) to the acoustic observations (e.g., eigenray arrival times). Ocean acoustic tomography (OAT) methods aim at reco
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b8acce6b931f8575d3e6686a5dd2551
https://doi.org/10.1121/10.0016498
https://doi.org/10.1121/10.0016498
Autor:
Karim G. Sabra
Publikováno v:
The Journal of the Acoustical Society of America. 152:1201-1216
Using a network of a few compact mobile underwater platforms, each equipped with a single acoustic sensor, as a distributed sensing array is attractive but requires precise positioning of each mobile sensor. However, traditional accurate underwater p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::adc6a63181cb2e5d8e5175e0468c0e14
https://doi.org/10.1121/10.0013752
https://doi.org/10.1121/10.0013752
Publikováno v:
The Journal of the Acoustical Society of America. 148:2267-2279
A general blind deconvolution algorithmic framework is developed for sources of opportunity (e.g., ships at known locations) in an ocean waveguide. Here, both channel impulse responses (CIRs) and unknown source signals need to be simultaneously estim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7f8975e886aeb459f4ef719434286fa
https://doi.org/10.1121/10.0001975
https://doi.org/10.1121/10.0001975
Publikováno v:
The Journal of the Acoustical Society of America. 147:EL517-EL522
A class of passive acoustic identification (AID) tags with curved symmetry for underwater navigation is presented. These AID tags are composed of radially stratified shells designed to backscatter a unique specular reflection pattern independent of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d41066385643579b722ab60a34e45f3f
https://doi.org/10.1121/10.0001444
https://doi.org/10.1121/10.0001444
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 67:984-996
Acoustic power transfer (APT) for wireless electronic components has received growing attention as a viable approach to deliver power to remotely located small electronic devices. The design of an efficient APT system requires accurate models to desc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6608631b05ddcb06f527b50f1b736dd0
https://doi.org/10.1109/tuffc.2019.2962711
https://doi.org/10.1109/tuffc.2019.2962711
Autor:
Aileen Fagan, Christopher M. Verlinden, Jit Sarkar, Karim G. Sabra, Jacquelyn S. Kubicko, James S. Martin, Brendan Nichols
Publikováno v:
IEEE Journal of Oceanic Engineering. 45:607-630
This study investigates the information content of ship noise received on a drifting volumetric array of hydrophones in shallow water marine environments for the purposes of conducting acoustic thermometry or other environmental inversions. Passive i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c9c0e162c9eb068363df57b69835c3b
https://doi.org/10.1109/joe.2018.2877873
https://doi.org/10.1109/joe.2018.2877873
Autor:
Karim G. Sabra, Nicholas C. Durofchalk
Publikováno v:
The Journal of the Acoustical Society of America. 147:1927-1938
The ray-based blind deconvolution (RBD) technique for ocean waveguides estimates both the unknown waveform radiated by some source of opportunity and the channel impulse response (CIR) between the source and the receiving elements of an array of hydr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb171f9d55b53ea3803d99bec7b1dc59
https://doi.org/10.1121/10.0000919
https://doi.org/10.1121/10.0000919
Publikováno v:
The Journal of the Acoustical Society of America. 153:A304-A304
Accurate knowledge of the spatial and temporal evolution of the three-dimensional ocean sound speed profile (SSP) is crucial for underwater source localization. Ocean acoustic tomography (OAT) methods aim at reconstructing SSPs variations based on ac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb9c41744af59ba83812e2d754b6ebde
https://doi.org/10.1121/10.0018937
https://doi.org/10.1121/10.0018937
Publikováno v:
The Journal of the Acoustical Society of America. 153:A345-A345
Autonomous underwater vehicle (AUV) navigation requires accurate positioning information from the surrounding environment, especially for tasks such as AUV homing or docking operations. Previous literature has introduced a class of low-cost passive u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f1bd0d204e80812a915a00a940269ec
https://doi.org/10.1121/10.0019102
https://doi.org/10.1121/10.0019102
Publikováno v:
The Journal of the Acoustical Society of America. 153:A346-A346
The ocean covers 70% of the Earth surface area, yet over 80% of it remains unexplored despite the advances in underwater acoustics and oceanography. Ocean exploration is critical for accurate climate model development, renewable energy applications,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d76ab6522c5276d13a4591647aff0bbb
https://doi.org/10.1121/10.0019104
https://doi.org/10.1121/10.0019104