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Search-and-rescue algorithm identifies hidden 'traps' in ocean waters（图）
Search-and-rescue algorithm identifies hidden traps ocean waters
2020/6/2
When an object or person goes missing at sea, the complex, constantly changing conditions of the ocean can confound and delay critical search-and-rescue operations.Now researchers at the Massachu...
Niche Modeling Perspective on Geographic Range Predictions in the Marine Environment Using a Machine-learning Algorithm
Geographic Range Predictions Machine-learning Algorithm
2015/7/31
Biological communities are changing drastically in response to global climate change (Walther et al., 2002), changes in use by human populations (Krishtalka et al., 2002), and introduction of exotic s...
A finite volume algorithm based on overlapping meshes for simulation of hydrodynamic problems
interfacial flow fluid-structure interaction wave tank
2009/12/25
A finite volume algorithm was established in order to investigate two-dimensional hydrodynamic problems. These include viscous free surface flow interaction with free rigid bodies in the case of large...
An algorithm for detecting layer boundaries in sediments
algorithm layer boundaries sediments
2009/11/9
In this paper we present an algorithm based on wavelet multiscale decomposition, designed to detect lines of maximal gradients in horizontal direction within two-dimensional data sets. The algorithm i...
Classifying ships by their acoustic signals with a cross-bispectrum algorithm and a radial basis function neural network
acoustic vector signal cross-bispectrum feature extraction RBFNN ship classification
2009/3/25
An algorithm for estimating the cross-bispectrum of an acoustic vector signal was formulated. Composed features of sound pressure and acoustic vector signals are extracted by the proposed algorithm an...
Fast direction of arrival algorithm based on vector-sensor arrays using wideband sources
acoustic vector sensor propagator method coherent processing fast algorithm
2008/9/25
An acoustic vector sensor (AVS) can capture more information than a conventional acoustic pressure sensor (APS). As a result, more output channels are required when multiple AVS are formed into arrays...
A finite volume algorithm based on overlapping meshes for simulation of hydrodynamic problems
interfacial flow fluid-structure interaction wave tank
2008/3/25
A finite volume algorithm was established in order to investigate two-dimensional hydrodynamic problems. These include viscous free surface flow interaction with free rigid bodies in the case of large...
Valuable mineral resources are widely distributed throughout the seabed. autonomous underwater vehicles (AUVs) are preferable to remotely-operated vehicles (ROVs) when probing for such mineral resources as the extensive exploration area makes it difficult to maintain contact with operators. AUVs depend on batteries, so their power consumption should be reduced to extend exploration time. Power for conventional marine instrument systems is incorporated in their waterproof sealing. External intermittent control of this power source until termination of exploration is challenging due to limitations imposed by the underwater environment. Thus, the AUV must have a power control system that can improve performance and maximize use of battery capacity. The authors developed such a power control system with a three-step algorithm. It automatically detects underwater operational states and can limit power, effectively decreasing power consumption by about 15%.
surface piercing propeller boundary element method hydrodynamic characteristics
2008/3/25
Demand for high-speed marine vehicles (HSMVs) is high among both commercial and naval users. It is the duty of the marine vessel’s designer to provide a hull and propulsion system that diminishes drag...
In situ determination of the quantum yield of phytoplankton chlorophyll a fluorescence: A simple algorithm, observations, and a model
In situ determination quantum yield phytoplankton chlorophyll fluorescence: A simple algorithm observations model
2003/3/20
Vertical profiles of the in situ quantum yield of fluorescence of chlorophyll a, φf, were derived with an algorithm from spectral underwater radiometer measurements. Select inherent optical properties...