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Full-Text Articles in Physical Sciences and Mathematics
Integrated Numerical Model For The Simulation Of The T.S. Taipei Oil Spill, Cheng-Di Dong, Thi-Hong-Hanh Nguyen, Tien-Hung Hou, Chia-Cheng Tsai
Integrated Numerical Model For The Simulation Of The T.S. Taipei Oil Spill, Cheng-Di Dong, Thi-Hong-Hanh Nguyen, Tien-Hung Hou, Chia-Cheng Tsai
Journal of Marine Science and Technology
In this study, two freely available models, the hydrodynamic model Princeton Ocean Model (POM) and the oil spill model OpenOil, are integrated to simulate the T.S. Taipei oil spill that occurred on March 10, 2016. In these models, the amount of oil spilled into the sea is distributed among a large number of small and equal mass particles. Meteorological data such as wind velocity, air surface temperature, and current data from the POM are used as inputs. The Lagrangian particle traction with prescribed advection and reaction is used to model the spilled oil. The results are compared with in-situ observations …
Flame And Flow Characteristics Of A Plane-Jet Flame Modulated By A V-Shaped Fluidic Oscillator, Ching Min Hsu, Hsiu Feng Yang, Yuan Xu Zhang
Flame And Flow Characteristics Of A Plane-Jet Flame Modulated By A V-Shaped Fluidic Oscillator, Ching Min Hsu, Hsiu Feng Yang, Yuan Xu Zhang
Journal of Marine Science and Technology
The characteristic flame behaviors and velocity fields of a plane-jet flame modulated by a fluidic oscillator were experimentally studied. The flame behaviors were observed by the traditional photographic technique. The time-averaged velocity fields of the jet flame were measured by a high-speed particle image velocimeter. The temperature distributions of the jet flame were measured by an R-type thermocouple. The pulsating reacting jets issued from the side slots of the fluidic-oscillator burner formed two diffusion flames. By observing the flame behavior at around burner exit, three characteristic flame modes: attached flame, transitional flame, and lifted flame, were identified in the domain …
Robust Super-Resolution Approach To Source Localization In Ocean Waveguide Using Sparsity Constraint, Hai-Yan Song, Chang-Yi Yang, Ke-Jun Wang
Robust Super-Resolution Approach To Source Localization In Ocean Waveguide Using Sparsity Constraint, Hai-Yan Song, Chang-Yi Yang, Ke-Jun Wang
Journal of Marine Science and Technology
Source localization in an ocean waveguide is a challenging problem because of the complexity of underwater acoustic propagation. Matched-field processing (MFP) has attracted considerable attention and has become a crucial technique for underwater acoustic source localization. Compressive sensing can achieve spatial sparsity, thus improving spatial resolution, by imposing penalties based on l1-norm. In this study, we developed a robust super-resolution approach for source localization in an ocean waveguide, which utilizes the inherent sparse structure of the spatial localization problem and underwater sound propagation principle. The proposed approach can be formulated as a sparse representation problem and further converted into a …
Rectangle-Based Approaches For Representing Flood Data In Spatial Indices, Ya-Hui Chang, Wen-Han Lee, Tai-Feng Ke
Rectangle-Based Approaches For Representing Flood Data In Spatial Indices, Ya-Hui Chang, Wen-Han Lee, Tai-Feng Ke
Journal of Marine Science and Technology
Appropriate representation of flood data in indices is crucial for efficient future querying. A common approach is to use minimum bounding rectangles to build R-tree indices rather than storing real complex objects; however, the results may be imprecise. Herein, to improve the performance of this approach, we discuss methods for producing corresponding rectangles. The first method involves generating a set of small fixed-sized squares, and the second one attempts to initially obtain a large rectangle. The third approach recursively partitions the space into four quadrants until the given size constraint is satisfied. Experimental results based on the real flood data …