Results 141 to 150 of about 4,113,395 (325)
Miniature sonar fish tag [PDF]
, 1975 Self-powered sonar device may be implanted in body of fish. It transmits signal that can be detected with portable tracking gear or by automatic detection-and-tracking system. Operating life of over 4000 hours may be expected.
Ferguson, R. L., Lovelady, R. W.
core +1 more source
Feasibility of Second Harmonic Imaging in Active Sonar: Measurements and Simulations [PDF]
, 2012 Fabrice Prieur +4 more
openalex +1 more source
Undersea immersed tube tunnel docking positioning via active cooperative target photogrammetry
Computer-Aided Civil and Infrastructure Engineering, EarlyView.Abstract Deep water, distant sea, unmanned is the inevitable trend of the development of marine engineering, the underwater positioning system for the accuracy, real‐time, and environmental adaptability of the aspects of the increasingly high requirements.
Huachuan Ma +5 more
wiley +1 more source
Advanced Mid-Water Tools for 4D Marine Data Fusion and Visualization [PDF]
, 2009 Mapping and charting of the seafloor underwent a revolution approximately 20 years ago with the introduction of multibeam sonars -- sonars that provided complete, high-resolution coverage of the seafloor rather than sparse measurements. The initial focus
Arsenault, Roland J. +6 more
core +1 more source
Adapting the minimum variance beamformer to a graphics processing unit for active sonar imaging systems [PDF]
, 2013 Jo Inge Buskenes +3 more
openalex +1 more source
Seasonal Abundance and Distribution of Cetaceans in a High Traffic Shipping Corridor
Marine Mammal Science, EarlyView.ABSTRACT The recovery of many cetacean species coincides spatially and temporally with intensifying anthropogenic threats. We undertook multi‐year systematic surveys to quantify seasonal abundance and document the distribution of at‐risk cetaceans, which is needed to assess the impacts of increasing human activities in the Canadian portions of the ...
Christie J. McMillan +4 more
wiley +1 more source
Active Sonar Target Recognition Using Fractional Fourier Transform [PDF]
, 2013 Jongwon Seok +2 more
openalex +1 more source
Marine Mammal Science, EarlyView.ABSTRACT Studies of cetacean diving behavior in multiple locations in different ocean basins allow for an assessment of variability within and among populations. We examine foraging dive behaviors of goose‐beaked whales (Ziphius cavirostris) and dense‐beaked whales (Mesoplodon densirostris) using data from 132 tagged whales in seven locations in the ...
Jay Barlow +18 more
wiley +1 more source
Online algorithms for POMDPs with continuous state, action, and observation spaces
, 2018 Online solvers for partially observable Markov decision processes have been applied to problems with large discrete state spaces, but continuous state, action, and observation spaces remain a challenge.
Kochenderfer, Mykel, Sunberg, Zachary
core +1 more source
Successful stocking of wild European perch in a reestablished lake with lasting effect over 10 years
Restoration Ecology, EarlyView.Biological manipulation of fish compositions to enhance top‐down control of trophic webs is a common method for improving water and ecological quality in shallow eutrophic lakes, but it often fails. As an alternative to manually thinning unfavored fish stocks, piscivorous fish species can be released to suppress the recruitment of cyprinid fish ...
Theis Kragh +3 more
wiley +1 more source