-In view of the fundamental Forces-directed iteration the shortcoming of the slow speed, In this paper, using the method of Hyper node and Multilayer method to improve the algorithm and applied to the large-scale graphics drawing automatically, Hyper node Method is the distance of the vertex as a Hyper node to the whole processing, with the Octree data structure to define and iterate over Hyper node. Multilayer method using maximum independent edge set or maximum independent set of points to simplify the graphics on a large scale, by Forces-directed of solving optimization simplified diagram and then find the original inverse iteration. Experiments show that the method of Automatic drawing to draw true and vivid, drawing speed is greatly increased and well expressed the people's automatic drawing intentions with Multilayer method and Hyper nodes.
Although the voltage level of distribution network is low, the variety of power equipment is complicated, the users are uneven, and there is a greater risk of electric shock. The problem of leakage in distribution line are discussed. First of all, the leakage protection is systematically analyzed, then the correct use of leakage protection in distribution network is studied. Finally, the common problems of leakage protection are expounded from the human level and material level. The solution suggestion is given. The research of leakage protection is of great significance to promote the application of leakage protection. The purpose is to make the staff understand the correct use of leakage protection, which has certain promotion value.
Abstract. The cables are usually laid underground, don't take up ground and space, are conducive to the city, factory neat and beautiful, play a role in that they can't be replaced by overhead lines on many occasions, and the cables are widely used. It is Unable to avoid breaking down for the long time running cables. This thesis aims at the malfunctions of the original cable that leads to the lack of precise positioning. Developing intelligent charge and discharge device is used to replace manual work that hands insulating rod to charge and discharge again and again, this device improves working efficiency, and ensures safety. We focus on component and application method of intelligent charge and discharge device.
Compared with other traditional energy, the small-scale hydropower which is intermittent energy can not be stored and scheduled. The greater fluctuant of the output power of small-scale hydropower leads to great difficult to the operation of the power system. Most of the existing small-scale hydropower forecasting is considered as the load forecasting factors, and there is not effective forecasting method. This paper establishes an output power forecasting model of the small-scale hydropower based on Projection Pursuit. The simulation results show that the new algorithm has a strong practical application in the small-scale hydropower output power forecasting and the forecast accuracy meets the scheduling requirements.
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