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In this work we benchmark, for the first time, the latest Standard Particle Swarm Optimisation algorithm (SPSO-2011) against the 28 test functions designed for the Special Session on Real-Parameter Single Objective Optimisation at CEC-2013. SPSO-2011 is a major improvement over previous PSO versions, with an adaptive random topology and rotational invariance constituting the main advancements. Results...
A key challenging area in micro-scale energy harvesting system is that the miniature energy transducers output voltage is very low. This low voltage results lower speed and noise margins in digital circuits and lower dynamic range in analog circuits. Therefore an efficient charge pump circuit is needed which can achieve higher output voltage from the available low supply voltage. In this paper we...
For the last two decades, significant improvements in charging technologies have been made. Moreover, novel applications have been proposed and tested, obtaining important and promising results. Inductive charging for electric vehicles (EV) and hybrid electric vehicles (HEV) is one of them. Because of the positive impact that this technology represents, it is important to understand the general characteristics...
We study the asymptotic behavior of the capacity of erasure networks under a restricted class of network coding schemes, called spatial network coding. In spatial network coding, nodes are permitted to only combine data units received from distinct incoming links; multiple data units arriving on the same link may not be coded together. Elsewhere, it has been shown that the network capacity under spatial...
In superpeer based networks, the superpeers are discovered through the process of bootstrapping, whereby resourceful peers get upgraded to superpeers. However, bootstrapping is influenced by several factors like limitation on the maximum number of connections a peer can have due to bandwidth constraints, limitation on the availability of information of existing peers due to cache size constraints...
Multilevel inverter is one of the most recent and popular type of advances in power electronics. It synthesizes desired output voltage waveform from several dc sources used as input for the multilevel inverter. This paper presents the two techniques for improving the quality of the output voltage and efficiency. First, new novel topology for multilevel inverter is introduced which reduces the number...
We investigate what kind of information should be exchanged for controlling multiple VNTs. Simulation results show number of reconfigurations to find good VNTs is significantly reduced with slightly increased, but still marginal, amount of information.
We consider the problem of reaching consensus in a network of the first-order continuous-time agents with switching topology. The coupling gains are neither piecewise-continuous, nor separated from zero, nor symmetric, though the network topology is assumed to be undirected. The main result of the paper provides conditions on the network topology that are necessary and sufficient for reaching consensus.
We propose two distributed algorithms, one for solving the weight-balance problem and another for solving the bistochastic matrix formation problem, in a distributed system whose components (nodes) can exchange information via interconnection links (edges) that form an arbitrary, possibly directed, strongly connected communication topology (digraph). Both distributed algorithms achieve their goal...
A class of simple network topologies is proposed and analyzed in this paper as part of the research on a polymorphous array architecture for graphics and image processing. The topologies are extended from the mesh network topology and are amenable to VLSI implementation. Simulation and theoretical analyses show that these topologies have many advantages over the mesh and Xmesh topologies. Routing...
The quasi-Z-source inverter (qZSI) which originated from the Z-source inverter (ZSI) topology provides an alternative for the conventional two stages DC-DC/DC-AC PV based inverter system with less component number, simpler topology and overcomes some of the limitations and problem associated with the conventional inverter topology. In the application of grid-connected PV inverter system, power storage...
In this paper, a new basic topology is proposed for cascaded multilevel inverters. The proposed basic topology is comprised of two dc voltage sources, two unidirectional power switches, and an H-bridge. A new generation of cascaded multilevel inverters can be achieved by series connection of some number of proposed basic topology. The proposed cascaded multilevel inverter in symmetric condition utilizes...
This paper studies the distributed containment control problem for networked multiple quadrotors with multiple stationary leaders under a directed graph which is the communication topology between the leaders and the followers for arbitrary initial states. Necessary and sufficient conditions on the communication topology are shown. The model of a quadrotor is divided into two subsystems, one is under-actuated...
One of the popular dynamics on complex networks is the SIS epidemic spreading. The SIS epidemic model describes how infections spread throughout a network. The SIS model was extended to Susceptible-Alert-Infected-Susceptible (SAIS) model [1] to incorporate reaction of agents to the spread of the infection. Built upon the SAIS model, we investigate how information dissemination can help boosting the...
This paper proposes a three-phase voltage source inverter employing space vector modulation control scheme. The proposed inverter is a modular type that can increase its level by adding more cells to each arm. The phase ‘a’ arm consists of ‘m’ cells and each cell consists of single isolated dc source with two switches. Switches are connected in such a way that one switch is in series with the isolated...
In this paper, the optimal design problem of both information structure and cooperative control is investigated for a collection of heterogeneous nonlinear systems. The concept of generalized passivity is presented to not only extend the concept of passivity to dynamical systems of any relative degree but also achieve the decoupling between designing a system-level self-feedback control law for any...
Data centers play the crucial role in the delivery of Cloud services by enabling on-demand access to the shared resources such as software, platform, and infrastructure. Virtual Machine (VM) allocation is one of the challenging tasks in the data center management since user requirements, typically expressed as SLAs, have to be met with the minimum operational expenditure. Despite their huge processing...
The nature of interruptible load programs- immediate, variable, and complex- set it apart from most dispatch type optimization problems. Not only does one have to minimize the total cost of interruption, but also has to generate a dispatch that follows time-based operational limits, and sometimes minimize the frequency of interruptions made. Previous studies have shown the promise of binary particle...
In this paper, we consider group consensus problem by giving a kind of new protocol in which communication graph weights are all nonnegative. This is also consistent with classic protocols. The sufficient conditions which group consensus under this kind of protocols can reach for both single and second order multi-agent system are obtained. Finally, numerical examples are given to illustrate our theoretical...
In this paper we present a generalization of reactive obstacle avoidance algorithms for mobile robots operating among soft hazards such as off-road slopes and deformable terrain. A new hazard avoidance scheme generalizes constraint based reactive algorithms [1], [2] from hard to soft hazards. Reactive controllers operate by directly parameterizing the closedloop dynamics of the system with respect...
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