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With the increasing concerns for the traditional energy shortage and environment issues, distributed generation (DG) systems based on renewable energy sources (RES) have experienced a fast development in recent years. With more DG units being integrated into the power system, a more recent concept, called microgrid, is developed by grouping a cluster of loads and parallel DG units in a local area...
This paper explores the background and characteristics of virtual enterprises, the cooperation motivation in virtual enterprises. Then we study the stability of the cooperation based on the noisy polymorphic population replicator dynamic model, and analyze how the uncertainty caused by the fierce rivalry or other outside factors influences the cooperation strategy of the member enterprises. The result...
The time delay of Lurie nonlinear systems, in which the origin of the nonlinear systems is the absolute stability, is estimated by using a Liapunov-Razumikhn function. Two sufficient conditions are obtained about absolutely stable criteria of nonlinear systems. A numerical example illustrates the effectiveness of the presented algorithm. We find that the key problem is how to choose tau. The value...
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