The integration of intermittent and stochastic renewable energy resources requires increased flexibility in the operation of the electric grid. Storage, broadly speaking, provides the flexibility of shifting energy over time; network, on the other hand, provides the flexibility of shifting energy over geographical locations. The optimal control of storage networks in stochastic environments is an […]
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Distributed Online Modified Greedy Algorithm for Networked Storage Operation Under Uncertainty
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An improved cluster head selection approach for energy efficiency in wireless sensor networks: A review
In this paper, we analyze various energy efficient routing protocols to improve the lifetime of wireless sensor networks. WSNs are composed of a large number of sensor nodes which have limited energy. Energy conservation is a very critical issue to design energy efficient routing techniques in wireless sensor networks. The paper reviews the traditional energy […]
Read moreThe impedance of an antenna changes heavily with changing EM environments, while RF power amplifiers (PAs) are optimized for driving a well-defined load impedance. As a solution, switchable matching networks are used in automatic antenna tuners to match the antenna impedance to (about) the desired PA load impedance. This paper presents a theoretical treaty of […]
Read moreHigh step-up voltage gain dc-dc converters are widely applied in fuel cell stacks, photovoltaic arrays, battery sources, and high intensity discharge lamps power systems. Active-network converters with coupled inductors (CL-ANC) are derived from switched inductor active-network converters (SL-ANC). The proposed converter contains two coupled inductors which can be integrated into one magnetic core and two […]
Read moreThe populations of industrialized countries will decline over the coming decades. To ensure that we have efficient access networks in the coming age of depopulation, it is important to consider the reorganization of central offices over time. The cost for operating and maintaining central offices can be reduced by efficiently closing central offices. However, dynamic […]
Read moreIn the harsh environment where node density is sparse, the slow-moving nodes cannot effectively utilize the encountering opportunities to realize the self-organized identity authentications, and do not have the chance to join the network routing. However, considering most of the communications in opportunistic networks are caused by forwarding operations, there is no need to establish […]
Read moreDynamic control over real and reactive power flow is one of the key areas of concern for the modern grid. Traditional FACTS-based devices have proven to be too costly and complex to achieve any significant market penetration. Modifying existing transmission assets to make them controllable may be a cost-effective method of increasing the grid controllability. […]
Read moreThis Wireless communication is a key technology to improve mobility and service flexibility for different e-health applications such as remote patient monitoring, telemedicine, mobile hospital information system, etc. However, due to the increasing number of wireless devices, in near future wireless healthcare services may face challenges on medical band and electromagnetic interferences (EMI) to biomedical […]
Read moreIn this paper the design and simulation results of a full-duplex FSO communication link (500 meters) at 800 Mbps with coherent detection and polarization multiplexing is presented. In order to use a single optical system in the full-duplex scheme, subsystems of transmitter and receiver in each location was used.
Read moreIn some specific applicable scenarios, nodes are placed in some geographical areas and limited to move in their own community. We investigate the tradeoff between the delivery delay and the number of transmissions in the above multi-community delay tolerant networks by propagating a data packet in a carefully chosen segment of community. First, three restricted […]
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