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This work controlled a robotic fish swimming alongside a wall. Research shows that fish swimming alongside a wall use lateral lines to obtain nearfield information. This concept is also applicable in man-made underwater vehicles such as robotic fish, which mimic the swimming action of a fish. Pressure sensors on the surface of a robotic fish measure hydrodynamic pressure variation. According to two-dimensional...
This paper used DIDSON to get information of underwater fish and carried out the real-time multiple-target tracking, particularly the targets were dense. Analysis of fishery resources was also done through the data post-processing. Realtime data processing mainly included DIDSON image building/enhancement/filter, target detection and multiple-target tracking. Nearest neighbor clustering algorithm...
Daily increasing underwater visual data makes automatic object detection and recognition a great demand and challenging task. In this paper, we adopt a region proposal network to accelerate underwater object detection and recognition from Faster R-CNN. This process implement detection acceleration by using convolutional networks to generate high-quality object candidates, and by sharing these networks...
Saliency detection aims at automatically estimating visually salient object regions in an image, saliency segmentation and foreground extraction are two important applications of this. However, it is a challenge for underwater images to estimate salient regions by conventional saliency detection methods because of the low-contrast and poor quality. In this paper, we address this problem by combining...
Brominated flame retardants (BFRs) are ubiquitous industrial chemicals likely to persistently exist in the environment, bioaccumulate in food chains, and even may cause adverse health effects in human. Borgundfjorden fjord system, an important spawning ground for the Norwegian coastal cod (Gadus morhua) stock, was contaminated by significant levels of pollutants such as BFRs, due to the local previous...
Coastal area plays various roles for human life as food supplier, recreation area, and biodiversity. Its roles are very important from the environmental, economic, and social aspects. However, most of the coastal area surrounded by big cities is landfilled for industrial use or as a final site our garbage goes to. It provides us economic growth, however, it causes serious problems such as eutrophication,...
As the main nutrient inputs of ECS, nutrient concentrations of the Yangtze River increase significantly due to high-speed economy development, which play a very important impact on the East China Sea ecosystem. In this study, by integrating MEC model and Ecosim model, we analyzed the impacts of Yangtze nutrient fluxes change and fishery on the ecosystem of ECS. The results show that in only consideration...
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