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The accurate assessment of chlorophyll-a concentration in turbid coastal waters by means of remote sensing is quite challenging. In this study, a semi-analytical approach is used to analyze the mathematical relationship between chlorophyll-a concentration and remote sensing reflectance. Through evaluation by field measurements, it is shown that our model produces 31.4% uncertainty in quantifying chlorophyll-a...
Air flow field around open storage pile is a matter of flow around square cylinder. Prediction of wind flow over storage pile plays a dominant role in the evaluation of its environmental impact. Numerical simulation of flow around square cylinder has been widely recognized as a powerful tool in determining air flow field. This paper introduces the application of the numerical simulation in the research...
Through the finite element method, nonlinear load characteristics for a certain 1000 MW hydro generator within considering saturation are studied based on theoretical analysis. The characteristic curves are relationship between resultant current and air electromotive force. To obtain a series of saturated nonlinear load characteristic curves under varied conditions, the different operation conditions,...
The simulation model of high voltage generator is proposed in MATLAB/SIMULINK based on the equivalent mathematical model of the new type generator. Simulation module is established in a single-machine infinite-bus. A high voltage generator prototype rated at 162.5 kVA/5 kV is taken as the research object in this paper. The quasi-synchronizing parallel in operation characteristic is studied with digital...
A mathematical model of operation characteristics for generator is built through electric machines and electromagnetic field theory, and the method of solving the two-dimension electromagnetic field with FEM is given. To satisfy the demand of calculation of operation characteristics, the electromagnetic field with finite element method and external circuit of generator are coupled to calculate the...
Target detecting and tracking based on video is one of the significant research field of computer vision, in this paper some research has been done on the small moving target under the background of sea level. In the process of target detecting, the moving targets detecting algorithm combining the method of background subtraction with the method of symmetrical difference is proposed in this paper...
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