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The islands have plentiful renewable energy resources. Fully use of these renewable energy sources will greatly improve the power supply capacity and quality of the offshore micro grid. Considering the randomness and intermittence of the output of these renewable energy sources, it is a good choice to add energy storage devices into the grid to improve the reliability and stability of the system output...
Ice storage systems (ISSs) are deployed in many cooling systems to shift cooling load from peak to low periods, and to enhance service reliability by backing up cooling capacity in case of shortage. To enhance the reliability of power supply, industry is considering using battery energy storage systems (ESSs) to provide backup power. However, the high cost of ESSs requests an efficient use of them...
The health status assessment of power distribution areas (PDA) can provide a basis for the decision-maker to ascertain the unhealthy PDAs among multiple PDAs. In this paper, an evaluation indicator system of the health status of PDAs is established based on four evaluation indicators. A new data acquisition system is proposed in this paper to enhance the reliability of communication system. The evaluation...
The goal of complex event detection is to automatically detect whether an event of interest happens in temporally untrimmed long videos which usually consist of multiple video shots. Observing some video shots in positive (resp. negative) videos are irrelevant (resp. relevant) to the given event class, we formulate this task as a multi-instance learning (MIL) problem by taking each video as a bag...
Monoculture in a computer network is defined as executing the same protocols and software on all the networking devices. Multiple, correlated failures may be triggered in a monoculture network by attacks that exploit existing vulnerabilities in either protocols, software, or hardware. In this paper, optimal multiculture network design is used to improve the network reliability in the presence of correlated...
According to the character of long-term repairable storage systems, a method for estimation and optimization of storage availability is presented. Such system experiences two storage periods, cold storage period and hot storage period. According to the different inspection methods of the two periods, we established the storage models based on periodic inspection and continuous inspection respectively,...
Bipolar DC system provides flexible connection and decreased line-to-ground voltage level at the expense of potential voltage unbalance between positive pole and negative pole. Voltage balancer works as “Dependent Voltage Source” to eliminate the unbalance voltage. It is a critical grid-forming component for bipolar system. Considering the need of system expansion and “N+1” redundancy design, bipolar...
Recently, fault indicators with communication function have been increasingly used in fault diagnosis of distribution networks. In this paper, an objective function which considers the reliability index of the distribution network and economic factors synthetically has been proposed for optimal placement of fault indicators in distribution networks, and binary particle swarm optimization algorithm...
There are two broad safety related message categories in vehicular networks: emergency and periodic messages that should share the scarce wireless resource simultaneously. Emergency messages deliver time-critical information with guaranteed reliability, e.g., road-safety information, whereas periodic ones convey normal status update information, e.g., vehicular positions, that is less time- and loss-critical...
A universal design methodology for inter-leavers in bit-interleaved coded modulation (BICM) systems deploying binary irregular quasi-cyclic low-density parity-check (QC-LDPC) codes and higher-order modulation is presented. The interleaver is introduced to lower decoding threshold when higher-order modulation is adopted. For this purpose, an optimization procedure with modified numerical analysis as...
The ever-increasing complexity in power systems requires novel optimization and control tools. These tools must be validated prior to application to real power systems. Such validation requires access to a realistic, high fidelity power system network model. Fuel cost is an important element for such a model, but is often difficult to obtain due to confidentiality constraints. This paper advances...
With reliability and flexibility criteria surging, multi-level converters become of growing interest for high-power medium-voltage renewable energy applications. Specific objectives are met with specialized intelligent controls. The goal of this paper is to present a universal intelligent controller able to manage all degrees of freedom of multi-level power converters and any paradigm. To do so, a...
Vehicular Ad Hoc Networks (VANET) have become one of the most important research areas for the successful and deployment of intelligent transportation system and the unmanned vehicle technologies. In VANET, Travel Prediction-based Data Forwarding (TPD) was proposed as one of novel data forwarding schemes based on road traffic statistics. However, the TPD could not guarantee good performance in the...
Scale-out distributed storage systems have recently gained high attentions with the emergence of big data and cloud computing technologies. However, these storage systems sometimes suffer from performance degradation, especially when the communication subsystem is not fully optimized. The problem becomes worse as the network bandwidth and its corresponding traffic increase. In this paper, we first...
Packages of commercial Gallium-Nitride power semiconductors present increasingly small dimensions to enable low parasitic inductance, increasing the heat flux density of the package and the challenges associated with their thermal management. This paper compares between Printed Circuit Boards and Direct Copper Bonded as substrates for a Gallium Nitride based half-bridge from a thermal and reliability...
The paper presents the design and implementation of an integrated wireless network that support to the multiparametric geophysical monitoring network of the Campi Flegrei volcanic area. The wireless network is equipped with a tool for real-time monitoring and fault detection. The enhancement of the transmission system with respect to the previously existing one has been realized in view of the increased...
The paper presents the approach to web-services selection based on clearly expressed criteria that influence the choice of the appropriate service. Web-services selection is held based on fuzzy preference relations using multi choice alternative method. Evaluation of web-services is carried out based on comparison criteria and utility functions. The decision making process is served by criteria ordered...
The electro-mechanical conversion efficiency and the long-term reliability of Capacitive Micromachined Ultrasonic Transducers (CMUT) are mainly limited by the parasitic capacitance and by charge injection phenomena. In this paper, we investigated the possibility of reducing both the parasitic capacitance, by patterning the CMUT electrodes in order to avoid any superposition of the two electrodes outside...
This paper presents a methodology based on a multi-objective mathematical model to optimally allocate and coordinate protective devices and switches in electric power distribution systems with distributed generation (DG). The objective functions contemplate the economic and reliability requirements of a distribution network, seeking an optimized plan of operation at the minimum investment cost and...
This work investigates a micro immune optimization algorithm originated from the danger theory for single-objective probabilistic constrained optimization without any prior stochastic distribution information. In the whole process of population evolution, the current population is divided into species with different danger levels in terms of constraint dominance and danger radius update. Those species...
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