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As a heuristic search algorithm, the A∗ algorithm is often used to solve the problem of ships routing optimization. For convex obstacles, the A∗ algorithm is improved in the local optimal path planning of ships, when the increased number of waypoints lead a lower efficiency. The improved algorithm uses the angle between the starting point, the ending point and north direction as the heuristic information...
Access control is an indispensable security component of cloud computing, and hierarchical access control is of particular interest since in practice one is entitled to different access privileges. This paper presents a hierarchical key assignment scheme based on linear-geometry as the solution of flexible and fine-grained hierarchical access control in cloud computing. In our scheme, the encryption...
This paper proposed a new method of state of peak power capability prediction for Li-ion battery. Electrochemical impedance spectroscopy based equivalent circuit model is used as the reference model of battery dynamic characterization simulation, state of peak power capability is predicted based on the model and parameters estimation by fractional joint Kalman filter. By decomposing the voltage response...
Recently wind energy has developed at a fast pace, and it is necessary to develop equivalent models to represent dynamic behaviors of wind farms on power system. The equivalent wind method has been investigated for the aggregation of DFIG wind turbines. The detailed procedure for the calculation of equivalent wind has been analyzed. The necessity of classifying incoming winds has been shown. In order...
Computer simulation technique used in Physics Experiment has changed the traditional model of experiment teaching. It solves the problem of the shortage of teaching resources and it is helpful for the students to carry out the opening study. Meanwhile, a few disadvantages of Computer Simulation Experiment have been mentioned. The opening and simulation degree of the simulation system needs to be improved...
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