Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Zachary J. Waters"'
Demonstration of a quasi-monostatic autonomous underwater vehicle based high duty cycle active sonar
Autor:
Zachary J. Waters, Alain R. Berdoz, Jason Kost, Michael L. Saniga, Brian H. Houston, Timothy J. Yoder, Paul J. Gendron, D Amon, Harry J. Simpson
Publikováno v:
The Journal of the Acoustical Society of America. 145:EL90-EL96
The feasibility of resolving target returns within receive signals collected by a continuously transmitting quasi-monostatic, broadband, autonomous underwater vehicle (AUV) based sonar is explored. Theoretical studies supported by experimental result
Autor:
Brian H. Houston, Bernard R. Matis, Douglas M. Photiadis, Steven W Liskey, Zachary J. Waters, William B Wilson, Nicholas T Gangemi, Jeffrey W. Baldwin, Aaron D Edmunds
Publikováno v:
Langmuir : the ACS journal of surfaces and colloids. 36(21)
A material's acoustic properties depend critically upon porosity. Doping a soft material with gas-filled microballoons permits a controlled variation of the porosity through a scalable fabrication process while generating well-tailored spherical cavi
Autor:
Harun Yetkiny, Nicholay Topin, James McMahon, Daniel J. Stilwell, Artur Wolek, Zachary J. Waters
Publikováno v:
IROS
We present an anytime Monte Carlo tree search (MCTS) algorithm to generate real-time, near-optimal search paths in large subsea environments. The MCTS planner continuously builds a tree of the search space until either the allowed time per move is re
Publikováno v:
IROS
We address the challenge of computing search paths in real-time for subsea applications where the goal is to locate an unknown number of targets on the seafloor. Our approach maximizes a formal definition of search effectiveness given finite search e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a3587b2aad179e39d902a838eb7eca8b
http://arxiv.org/abs/1707.07662
http://arxiv.org/abs/1707.07662
Publikováno v:
The Journal of the Acoustical Society of America. 131:318-326
Iterative, single-channel time reversal is employed to isolate backscattering resonances of an air-filled spherical shell in a frequency range of 0.5-20 kHz. Numerical simulations of free-field target scattering suggest improved isolation of the domi
Autor:
Zachary J. Waters
Publikováno v:
The Journal of the Acoustical Society of America. 143:1973-1973
Monostatic active sonar systems are typically operated in a pulsed transmit configuration, where an acoustic source is first activated to provide ensonification of the environment and then de-activated while scattered and ambient environmental acoust
Autor:
Joseph A. Bucaro, Zachary J. Waters, Saikat Dey, Harry J. Simpson, Brian H. Houston, Timothy J. Yoder, Angie Sarkissian
Publikováno v:
The Journal of the Acoustical Society of America. 132(6)
Using a finite element-based structural acoustics code, simulations were carried out for the acoustic scattering from an unexploded ordnance rocket buried in the sediment under 3 m of water. The simulation treated 90 rocket burial angles in steps of
Autor:
Harry J. Simpson, Timothy J. Yoder, Angie Sarkissian, Zachary J. Waters, J. A. Bucaro, Brian H. Houston, Saikat Dey
Publikováno v:
The Journal of the Acoustical Society of America. 132(5)
Laboratory grade bistatic scattering measurements are conducted in order to examine the acoustic response of realistic fully buried unexploded ordnance (UXO) from above-critical angle insonification, between 2 and 40 kHz. A 127 mm diameter rocket UXO
Autor:
Paul E. Barbone, Zachary J. Waters
Publikováno v:
The Journal of the Acoustical Society of America. 131(6)
Power iterated single-channel time-reversal is extended to employ Lanczos iterations. The properties of these algorithms are studied in the presence of varying levels of noise and broadband clutter. It is shown the Lanczos iterated method possesses s
Autor:
Saikat Dey, David C. Calvo, Larry A. Kraus, Zachary J. Waters, Brian H. Houston, J. A. Bucaro, Timothy J. Yoder, Angie Sarkissian, M Saniga, Harry J. Simpson
This new project is exploring the potential for developing a structural acoustics (SA) based sonar methodology for wide area search and identification of underwater unexploded ordnance (UXO). This new approach may have significant advantages over mor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55742db2b9153a5220f8d1e87b58387c
https://doi.org/10.21236/ada546324
https://doi.org/10.21236/ada546324