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While selecting a proper power system architecture for a more electric aircraft (MEA), it is the system volume and weight that is treated as the most important criterion by researchers. However, with the increased use of power electronics converters and motor drive systems, the system stability would be deteriorated. Therefore, the system stability issue should also be considered besides system volume...
In this paper, a framework for stability analyses of a typical inverter-based islanded microgrid with a non-linear load is presented, namely ideal constant power load (CPL) which is supplied by tightly regulated power electronics converter. The whole dynamic model of the considered microgrid is firstly developed, based on which the small signal model of system is deduced at stable operating point...
In DTN, a small amount of selfish nodes occupy the storage of specific key nodes with stronger transfer capacity in hot spot region which greatly consumes the limited network storage resource. This causes congestion and reduces the successful delivery ratio of messages from other nodes. This paper adopts pigeonhole principle and power in combinatorics to define node's responsibility range of message...
Due to the limitation of DTN resource and intermittent connection, it's challenging to design a mechanism which achieves high message delivery successful ratio and control congestion to satisfy the demand. In this paper, a novel DTN congestion control routing mechanism, Ant Colony Optimization(ACO) for DTN congestion control algorithm(ADC) is proposed. In the message delivery, this mechanism can actively...
Due to the limited resources and intermittent connectivity of Delay-Tolerant Networks (DTNs), it is a challenging task to design an efficient congestion control method to meet the application requirements. In this paper, a new DTN congestion control method called following routing(FR) is proposed. In the method, when the transit node is about to be congested, current node will follow the route of...
When congestion happens at the node of DTN, the regular approach is to delete the old message of these nodes in order to make memory space for the new arrival message to remove congestion. A new method for the selection of message to delete, congestion control routing algorithm based on Simulated Annealing and regional movement (SARM) are proposed in this paper. This mechanism is under the premise...
This paper develops the model of urban social capital based on perpetual inventory method and individual social network, and measures the social capital stock of 203 cities in China during the period from 1988 to 2008. The results show that, the inequality, labor expected revenue, the expected investment rate of social capital, the probability of job mobility and social capital across the life of...
Manipulator is the most important part for underwater flexible robot manipulation. It is difficult to design the underwater manipulator control system due to the particularity of the work environment, high nonlinearity and strong coupling of the dynamic model. In order to improve fine performance capacity, a novel hybrid control method based on the cerebellar model articulation controller is proposed...
Although data duplications may be able to improve the performance of data-intensive applications on data grids, a large number of data replicas inevitably increase energy dissipation in storage resources on the data grids. In order to implement a data grid with high energy efficiency, we address in this study the issue of energy-efficient scheduling for data grids supporting real-time and data-intensive...
Virtual organizations offer significant enhancements to enterprisepsilas capabilities for collaboration and have exciting ambitions in e-Enterprise. But current researches pay less attention to how to guarantee reliable operation of e-Enterprises when they evolve dynamically. This paper combines the Semantic Web technology with architecture based modeling approach to semantically describe e-Enterprise...
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