Search Results - "Chu, Dezhang"

Environmental DNA provides quantitative estimates of Pacific hake abundance and distribution in the open ocean by Shelton, Andrew Olaf, Ramón-Laca, Ana, Wells, Abigail, Clemons, Julia, Chu, Dezhang, Feist, Blake E, Kelly, Ryan P, Parker-Stetter, Sandra L, Thomas, Rebecca, Nichols, Krista M, Park, Linda

“…All species inevitably leave genetic traces in their environments, and the resulting environmental DNA (eDNA) reflects the species present in a given habitat…”
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Calibration of broadband active acoustic systems using a single standard spherical target by Stanton, Timothy K., Chu, Dezhang

“…When calibrating a broadband active acoustic system with a single standard target such as a sphere, the inherent resonances associated with the scattering by…”
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Comparison of Coherent to Incoherent Kirchhoff-Ray-Mode (KRM) Models in Predicting Backscatter by Swim-Bladder-Bearing Fish by Li, Chao, Chu, Dezhang, Horne, John, Li, Haisen

“…The Kirchhoff-Ray-Mode (KRM) model has been used in fishery acoustics for more than two decades to predict backscatter by individuals or aggregations of…”
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Quantitative processing of broadband data as implemented in a scientific split‐beam echosounder by Andersen, Lars Nonboe, Chu, Dezhang, Handegard, Nils Olav, Heimvoll, Harald, Korneliussen, Rolf, Macaulay, Gavin J., Ona, Egil, Patel, Ruben, Pedersen, Geir

“…The use of quantitative broadband echosounders for biological studies and surveys can offer considerable advantages over narrowband echosounders. These include…”
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Comparisons among ten models of acoustic backscattering used in aquatic ecosystem research by Jech, J Michael, Horne, John K, Chu, Dezhang, Demer, David A, Francis, David T I, Gorska, Natalia, Jones, Benjamin, Lavery, Andone C, Stanton, Timothy K, Macaulay, Gavin J, Reeder, D Benjamin, Sawada, Kouichi

“…Analytical and numerical scattering models with accompanying digital representations are used increasingly to predict acoustic backscatter by fish and…”
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Measurements of acoustic scattering from zooplankton and oceanic microstructure using a broadband echosounder by Lavery, Andone C., Chu, Dezhang, Moum, James N.

“…Lavery, A. C., Chu, D., and Moum, J. N. 2010. Measurements of acoustic scattering from zooplankton and oceanic microstructure using a broadband echosounder. –…”
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Interpreting Echo Statistics of Three Distinct Clutter Classes Measured With a Midfrequency Active Sonar: Accounting for Number of Scatterers, Scattering Statistics, and Beampattern Effects by Stanton, Timothy K., Dezhang Chu, Gelb, James M., Tipple, George L., Kyungmin Baik

“…A recently developed published approach to predict echo statistics is applied to clutter data that were collected with a midfrequency sonar and published in a…”
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Using age compositions derived from spatio-temporal models and acoustic data collected by uncrewed surface vessels to estimate Pacific hake (Merluccius productus) biomass-at-age by Bolser, Derek G., Berger, Aaron M., Chu, Dezhang, de Blois, Steve, Pohl, John, Thomas, Rebecca E., Wallace, John, Hastie, Jim, Clemons, Julia, Ciannelli, Lorenzo

“…Generating biomass-at-age indices for fisheries stock assessments with acoustic data collected by uncrewed surface vessels (USVs) has been hampered by the need…”
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Statistics of Echoes From a Directional Sonar Beam Insonifying Finite Numbers of Single Scatterers and Patches of Scatterers by Dezhang Chu, Stanton, Timothy K

“…When a sonar beam sweeps across a field of scatterers and insonifies a different set of scatterers in each ping, the echoes can fluctuate significantly from…”
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Non-Rayleigh Echoes From Resolved Individuals and Patches of Resonant Fish at 2-4 kHz by Stanton, Timothy K, Dezhang Chu

“…In this paper, the statistics of the echo envelope measured from fish is studied over a range of scattering geometries in the frequency band 2-4 kHz. In this…”
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A Wave Glider Approach to Fisheries Acoustics: Transforming How We Monitor the Nation's Commercial Fisheries in the 21st Century by Greene, Charles, Meyer-Gutbrod, Erin, McGarry, Louise, Hufnagle, Lawrence, Chu, Dezhang, McClatchie, Sam, Packer, Asa, Jung, Jae-Byung, Acker, Timothy, Dorn, Huck, Pelkie, Chris

“…Possessing the world's largest Exclusive Economic Zone (EEZ), the United States enjoys the benefits of a multi-billion dollar commercial fishing industry…”
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Observations of Broadband Acoustic Backscattering From Nonlinear Internal Waves: Assessing the Contribution From Microstructure by Lavery, Andone C, Dezhang Chu, Moum, James N

“…In this paper, measurements of high-frequency broadband (160-590 kHz) acoustic backscattering from surface trapped nonlinear internal waves of depression are…”
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Protocols for calibrating multibeam sonar by FOOTE, Kenneth G, DEZHANG CHU, HAMMAR, Terence R, BALDWIN, Kenneth C, MAYER, Larry A, HUFNAGLE, Lawrence C, JECH, J. Michael

“…Development of protocols for calibrating multibeam sonar by means of the standard-target method is documented. Particular systems used in the development work…”
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Higher-order acoustic diffraction by edges of finite thickness by Chu, Dezhang, Stanton, Timothy K., Pierce, Allan D.

“…A cw solution of acoustic diffraction by a three-sided semi-infinite barrier or a double edge, where the width of the midplanar segment is finite and cannot be…”
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Improved parameterization of Antarctic krill target strength models by LAWSON, Gareth L, WIEBE, Peter H, ASHJIAN, Carin J, DEZHANG CHU, STANTON, Timothy K

“…There are historical discrepancies between empirical observations of Antarctic krill target strength and predictions using theoretical scattering models. These…”
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Acoustic diffraction by deformed edges of finite length: Theory and experiment by Stanton, Timothy K., Chu, Dezhang, Norton, Guy V.

“…The acoustic diffraction by deformed edges of finite length is described analytically and in the frequency domain through use of an approximate line-integral…”
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Sound scattering by several zooplankton groups. II. Scattering models by Stanton, T K, Chu, D, Wiebe, P H

“…Mathematical scattering models are derived and compared with data from zooplankton from several gross anatomical groups--fluidlike, elastic shelled, and gas…”
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Acoustic scattering by gas-bearing cyanobacterium Microcystis: Modeling and in situ biomass assessment by Chu, Dezhang, Ostrovsky, Ilia, Homma, Hikaru

“…Cyanobacterial harmful algal blooms (HABs) are increasing in a growing number of aquatic ecosystems around the world due to eutrophication and climatic change…”
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Application of pulse compression techniques to broadband acoustic scattering by live individual zooplankton by Chu, Dezhang, Stanton, Timothy K.

“…Distinct frequency dependencies of the acoustic backscattering by zooplankton of different anatomical groups have been observed in our previous studies [, ICES…”
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A phase-compensated distorted wave Born approximation representation of the bistatic scattering by weakly scattering objects: Application to zooplankton by Chu, Dezhang, Ye, Zhen

“…The distorted wave Born approximation (DWBA) method has been successfully used in modeling the acoustic backscattering by weakly scattering zooplankton…”
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