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Because of temperature gradients and inhomogeneous cooling rates after extrusion, the performances of HVDC XLPE cable insulation at radial position are not uniformly distributed. DC breakdown strength measurements of HVDC XLPE cable insulation specimens in inner insulation (near conductor shield), middle insulation and outer insulation (near insulation shield) have been carried out and show that DC...
The theoretical modeling and analysis of a feedforward decoupling based induction motor system with rotor field orientation control is presented in this paper. Small signal approximation is employed to get the output impedance and input impedance of the whole drive system with consideration of non-ideal power source. An oscillation compensation technique is proposed to improve the stability margin...
In past decades, the Dyna-clue model has been widely used in the world. In addition to efficacy of model's algorithms, the choice of factors, data processing and model parameter settings may affect the accuracy of the simulation as well. However, less attention has been paid to how spatial data processing (such as classification) impact simulation results. In this paper, four schemes are designed...
Rock fractures junctions are important objects for detection of rock fracture. Traditionally, junction detectors are devoted to the step-edge corners. Such corners are usually located using a Laplascian operator (zero-crossings or extrema) or a curvature measure based on the gradient direction. However, the gradient direction of a line does not exist, and a line junction does not correspond to a zero-crossing...
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