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The Avionics Full-Duplex Switched Ethernet (AFDX) network has established itself as a reference in aeronautical embedded communications to comply with the growth of bandwidth needs and the reliability requirements. Its determinism property imposes that AFDX frames have to transit through the network in a limited amount of time. Due to potential delays in the processing frames at a reception End-System,...
Software-Defined Networking (SDN) controllers are network entities that act as strategic control points in an SDN network. Controller placement studies mostly aim at optimizing network performance in terms of control latency, reliability and resilience, given network characteristics that are static. Yet dynamic traffic conditions, if not adapted by the controller placement properly, may cause high...
In this paper a new control method is introduced for grid-connected inverter (GCI) to inject sinusoidal current to grid in presence of nonlinear load and distorted grid voltage conditions. The proposed control method consists of two parts: current reference generation and current controller. To generate current reference, a new algorithm, based on Recursive Discrete Fourier Transform, is proposed...
An optimization mathematical model to minimize the costs associated with energy not supplied and investments on the allocation of sectionalizing switches and tie lines between branches and / or feeders in primary distribution systems is presented. This is a mixed integer nonlinear programming model, which considers the power flow constraints and continuity indexes. A set of trade-off solutions between...
Today's regulatory demands are providing incentives for cost reductions to network operators in Germany and several other countries. If no corrective measures are taken by national regulation authorities (NRA), this could result in a reduction of costs at the expense of quality of supply. Thus, in 2011 the German NRA has implemented a quality regulation scheme which incentivizes network operators...
Multi-MW wind power converter's reliability is a key issue for the whole wind power generation system. Due to wind power fluctuation, IGBT's handling power is fluctuating largely and rapidly, which will cause a large junction temperature variation of IGBT. Thermal stress is the main factor affecting IGBT's lifetime. In this paper, the adaptive thermal control is proposed to improve IGBT's lifetime...
Web service composition has become a promising technology in a variety of e-science or e-business areas. There are a variety of models and methods to deal with this issue from different aspects. Bio-inspired algorithms are becoming main approaches and solutions. This paper reviews the current researches on web service composition based on bio-inspired algorithms, such as Ant Colony Optimization (ACO),...
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