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To address the problems of network congestion, Active queue management (AQM) is advocated to improve the quality of services (QoS) for Internet. Random early detective (RED) algorithm is one of notably AQM mechanism, because it could reduce the high drop rate of bursty flows, avoid global synchronization among flows and reduces network latency (“ping time”). However, RED requires careful tuning of...
As an important characteristic of geo-spatial elements, scale has become an important aspect in GIS study. However, the existing algorithms mainly solve scale generalization problems of some specific types of data in 2D, which are not suitable for multi-elements integration of general GIS environment, especially in 3D GIS. With the help of ideas and methods relevant to ontology, the ontological significance...
The agent-based simulation is introduced in this paper in view of the complexity of industrial cluster system. The micro-mechanism of enterprises knowledge overflow in industrial cluster is analyzed, and then the enterprises knowledge overflow is simulated based on agent. According to the simulation, the positive and negative effects of enterprises knowledge overflow in industrial cluster are analyzed.
Summary form only given. Electricity markets have been moving on from infancy toward maturity. Experiences have shown that competitive market operation needs to integrate with secure and reliable system operation; otherwise, market failure and/or blackout may happen. This panel will review PJM's practice on how to achieve equilibrium between economic efficiency and system operation risk. In PJM's...
State estimation plays the key role in real-time bulk power system reliability operation and economical market operation. Active transactions across the regional transmission systems are integrated nature of today's electricity markets. To ensure stable and adequate SE solution, EMS engineers are paying more attentions on external network models, which usually deal with real-time operation uncertainties...
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