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Smart grid integrates the latest advances in information and communication technologies to contribute to a more reliable and efficient electricity system. By realizing the two-way communication between the utility and the smart meters in the houses, smart grid enables a time-of-use tariff to reduce peak load through incenting residents to adopt a more efficient usage of domestic appliances. In this...
With advanced Electric Vehicles (EVs) techniques being introduced in these decades, EVs are expected to be widely adopted as resident vehicles due to their low greenhouse gas emission and low operating costs. Meanwhile, the resident EV charging activities will be a challenging problem for the power grid and will cause severe voltage fluctuations, high Peak-to-Average Ratio (PAR) and increasing the...
Sensor networks can monitor interesting targets and fields. Most existing studies assume a constant utility (i.e. measurement accuracy) model within the sensing region. Yet the utility decreases in some scenarios as the distance becomes large. This paper considers the provisioned sensor placement problem where individual targets require different levels of utilities. The problem formulation is proved...
Sensor networks monitor surrounding environments and deliver gathered measurements towards sinks. In order to shorten data delivery paths, multiple sinks could be placed and thus data processing is more closer to sensors. This paper formulates a strategic sink placement problem and presents three algorithms in sequence. Simulation results show that the heuristic algorithm achieves the best performance...
In this paper, we propose a novel multi-channel medium access control protocol for wireless sensor networks. Our protocol can dynamically assign multiple channels to nodes, thereby significantly increasing network energy efficiency, network lifetime and data throughput as well. The protocol requires only one transceiver per node, but solves the multi-channel hidden terminal problem through distributed...
In wireless sensor network (WSN), the sensor location is crucial to many applications. So far, most of existing localization schemes assume that sensor nodes are static. But we can also find the dynamic wireless sensor network (DWSN) have great application foreground in dynamic situation. In this paper, we analyze characteristics of the DWSN and reason that existing localization schemes are unsuitable...
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