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IEEE Forum on Integrated and Sustainable Transportation System (FISTS)

作者： Alje van den Bosch Bart van Arem Mohamed Mahmod James Misener Department of Applied Mathematics Faculty of Electrical Engineering Mathematics and Computer Science University of Twente Netherlands Partners for Advanced Transit and Highways (PATH) program University of California Berkeley USA Department of Transport and Planning at the Faculty of Civil Engineering and Geosciences Delft University of Technnology Netherlands Centre of Transport Studies Faculty of Engineering University of Twente Enschede Netherlands

Social navigation provides drivers with an advice that aims to shift traffic flows in a network from a user equilibrium to a system optimum. The advice is based on minimizing a combination of the individual travel time and the marginal total travel time in the network. The level of altruism defines the extent to which a driver is willing to sacrifice his own travel time in favor of other drivers. Fuel consumption and CO2 emission are taking into account by converting them into time equivalent. Experimental results for a small network loosely representing the Bay area show that social navigation can reduce time delays by 10%. The reduction is positively correlated with network load, market penetration and level of altruism.

关键词： Navigation Driver circuits Vehicles Fuels Vehicle dynamics Roads Approximation methods

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SQUARAINE DONORS FOR HIGH EFFICIENCY SMALL MOLECULE SOLAR CELLS

SQUARAINE DONORS FOR HIGH EFFICIENCY SMALL MOLECULE SOLAR CE...

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IEEE Photovoltaic Specialists Conference

作者： Guodan Wei Siyi Wang Xin Xiao C. Kyle Renshaw Lincoln Hall Vyacheslav V. Diev Mark E. Thompson Stephen R. Forrest Department of Materials Science and Engineering University of Michigan Department of Chemistry University of Southern California Department of Electrical Engineering and Computer Science University of Michigan Applied Physics Program University of Michigan

ISBN: (纸本)9781424499663

It has been a challenge to achieve high efficiency organic photovoltaics (OPV) that absorb long wavelength solar radiation without incurring unacceptable reductions in open circuit voltage (V_(oc)) or charge separation efficiency. Based on the parent structure of the 2, 4-bis[4-(N, N-diisobutylamino)-2,6-dihydroxyphenyl] squaraine (SQ), we have increased V_(oc) using a family of highly near-infrared absorbing SQs, achieving values as high as 0.94 V. These SQ donors are: 2, 4-bis[4-(N-Phenyl-1-naphthylamino)-2,6-dihydroxyphenyl] squaraine (1-NPSQ),2,4-bis[4-(N,N-diphenylamino)-2,6 dihydroxyphenyl] squaraine (DPSQ), 2,4-bis[4-(N,N-diphenylamino)-2,6-dihydroxyphenyl] asymmetric squaraine (DPASQ). The spin-cast SQ, 1-NPSQ, DPSQ and DPASQ donors are then coated with the acceptor C_(60) to form bulk heterojunction (BHJ) solar cells that take advantage of their exceptionally high absorption coefficient and nanocrystalline morphology to overcome the short diffusion length characteristic of these materials. Combined with a high short-circuit current density (J_(sc)=10.6 mA/cm~2) and high fill factor (FF=0.64), the optimized 1-NPSQ/C_(60) photovoltaic cells with 1-NPSQ annealed at elevated temperature have a power conversion efficiency of η_p as high as 6.0% (correcting for solar mismatch) at 1 sun (AM 1.5G) simulated solar illumination, which to our knowledge is the highest efficiency reported to date for small molecule OPVs.

关键词： Photovoltaic cells Absorption Annealing Educational institutions Sun USA Councils Heterojunctions

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Guest editorial: Data mining in bioinformatics and biomedicine

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IEEE Transactions on Information Technology in Biomedicine 2010年第1期14卷 1-2页

作者： Chen, Xue-Wen Arabnia, Hamid R. Department of Electrical Engineering and Computer Science Information and Telecommunication Technology Center University of Kansas Lawrence KS 66045 United States Department of Computer Science University of Georgia Athens GA 30602 United States

The five papers in this special issue cover a broad range of topics, from analytic methods for DNA/RNA sequences, gene expression analysis, to protein function predictions.

关键词： Data mining Bioinformatics Proteins DNA RNA Sequences computer science Gene expression Machine learning Visual databases

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Handling Failures of Static Sensor Nodes in Wireless Sensor Network by Use of Mobile Sensors

Handling Failures of Static Sensor Nodes in Wireless Sensor ...

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International Conference on Advanced Information Networking and Applications Workshops (AINAW)

作者： Edison Pignaton de Freitas Tales Heimfarth Ivayr Farah Netto Carlos Eduardo Pereira Armando Morado Ferreira Flavio Rech Wagner Tony Larsson IDE Halmstad University Halmstad Sweden Institute of Informatics Federal University of Rio Grande do Sul Porto Alegre Brazil Computer Science Department Federal University of Lavras Lavras Brazil Electrical Engineering Department Federal University of Rio Grande do Sul Porto Alegre Brazil Defense Engineering Graduate Program Military Institute of Engineering Rio de Janeiro Brazil

Node failures in Wireless Sensor Networks composed by static sensor nodes are common due to the nature of the sensor devices and the usually harsh environments in which they are deployed. Node failures can diminish the performance of the network as a whole, thus affecting its functionality in delivering the desired services. For instance, significant regions can become uncovered due to failure of several nearby nodes. This paper reports a study about the use of mobile sensor nodes acting in cooperation with static ones in order to fill gaps created by faulty static nodes. The proposed fault handling mechanism presents alternative policies with pros and cons, depending on the user priorities imposed to the system and the occurrence of failures. A discussion about this topic is presented based on results obtained by simulation of the proposed mechanisms.

关键词： Wireless sensor networks Mobile communication Surveillance Redundancy Sensors Proposals

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An application of fractional intelligent robust controller for electromechanical valve

An application of fractional intelligent robust controller f...

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World Congress on Information and Communication Technologies (WICT)

作者： Tribeni Prasad Banerjee Suman Saha Swagatam Das Ajith Abraham Department of Electronics and Telecommunication Engineering Jadavpur University Kolkata India Drives and Control System Laboratory CSIR-Central Mechanical Engineering Research Institute Durgapur West Bengal India IT For Innovations EU Center of excellence Faculty of Electrical Engineering and Computer Science VSB-Technical University of Ostrava Czech Republic Scientific Network for Innovation and Research Excellence Machine Intelligence Research Laboratories-MIR Laboratories WA USA

The paper analyzed and model of a fault tolerant electromechanical controlled worm gear driven fuel shut off valve for aerospace application. The analysis is mainly on design a reduced order fractional controller. This is for controlling the velocity of worm gear so that the friction torque due to uneven rotational speed can be avoided. Because with the friction and stiction and backlash the valve system performance is reduced and more and more unstable this leads the system to failure. The proposed controller can provide robustness against the uncertain loading torque and system parameter.

关键词： Valves Gears Equations Control systems Robustness Mathematical model Torque

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Realistic rendering and modeling of plants

Realistic rendering and modeling of plants

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2010 6th International Conference on Natural Computation, ICNC'10

作者： Yan, Dongsheng Zeng, Lanling Computer Science Department Guangdong Police College Guangzhou China Computer Science and Telecommunication Engineering Jiangsu University Zhenjiang China

ISBN: (纸本)9781424459612

The simulation and modeling of nature scenes with thousands of plants is challenging because of its complexity. In this paper, we devise an efficient interactive system for solving this problem and decompose the process of scenes synthesis into steps: modeling the individual plants, modeling the terrain, specification the plants distribution, and rendering the landscape. What's more, we give a new fractal noise function, a new algorithm to describe the natural phenomenon of clustering and two efficient interactive editors for generating all kinds of terrains and plants. We compound computer graphic and image technique in rendering to improve the speed and also propose a landscapes walk-through framework to achieve more realistic. © 2010 IEEE.

关键词： Image enhancement

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Spiking neural network decoder for brain-machine interfaces

Spiking neural network decoder for brain-machine interfaces

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International IEEE/EMBS Conference on Neural engineering, CNE

作者： Julie Dethier Vikash Gilja Paul Nuyujukian Shauki A. Elassaad Krishna V. Shenoy Kwabena Boahen Department of Bioengineering University of Stanford Stanford CA USA Department of Computer Science and Stanford Institute of Neuro-Innovation and Translational Neuroscience University of Stanford Stanford CA USA Department of Bioengineering and MSTP University of Stanford Stanford CA USA Departments of Electrical Engineering and Bioengineering Neurosciences Program University of Stanford Stanford CA USA

We used a spiking neural network (SNN) to decode neural data recorded from a 96-electrode array in premotor/motor cortex while a rhesus monkey performed a point-to-point reaching arm movement task. We mapped a Kalman-filter neural prosthetic decode algorithm developed to predict the arm's velocity on to the SNN using the Neural engineering Framework and simulated it using Nengo, a freely available software package. A 20,000-neuron network matched the standard decoder's prediction to within 0.03% (normalized by maximum arm velocity). A 1,600-neuron version of this network was within 0.27%, and run in real-time on a 3GHz PC. These results demonstrate that a SNN can implement a statistical signal processing algorithm widely used as the decoder in high-performance neural prostheses (Kalman filter), and achieve similar results with just a few thousand neurons. Hardware SNN implementations - neuromorphic chips - may offer power savings, essential for realizing fully-implantable cortically controlled prostheses.

关键词： Neurons Kalman filters Decoding Prosthetics Neuroscience Real time systems Neuromorphics

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Noise-based information processing

Noise-based information processing

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International Conference on Noise and Fluctuations (ICNF)

作者： Laszlo B. Kish Sunil P. Khatri Sergey M. Bezrukov Ferdinand Peper Zoltan Gingl Tamas Horvath Department of Electrical and Computer Engineering Texas A and M University USA Laboratory of Physical and Structural Biology Program in Physical Biology NICHD National Institutes of Health DHHS Bethesda MD USA National Institute of Information and Communications Technology Kobe Japan Department of Experimental Physics University of Szeged Szeged Hungary Department of Computer Science University of Bonn Germany Schloss Birlinghoven Fraunhofer IAIS Sankt Augustin Germany

We briefly introduce noise-based logic. After describing the main motivations we outline classical, instantaneous (squeezed and non-squeezed), continuum, spike and random-telegraph-signal based schemes with applicatio... 详细信息

关键词： Logic gates Noise Power dissipation Multivalued logic Neurons Hardware computers

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Dynamic clustering for Wireless Sensor Networks: A neuro-fuzzy technique approach

Dynamic clustering for Wireless Sensor Networks: A neuro-fuz...

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2010 IEEE International Conference on Computational Intelligence and Computing Research, ICCIC 2010

作者： Veena, K.N. Vijaya Kumar, B.P. Department of Telecommunication Engineering JNN College of Engineering Shimoga Karnataka India Department of Computer Science and Engineering REVA ITM Bangalore Karnataka India

ISBN: (纸本)9781424459674

The most important challenge in Wireless Sensor Networks (WSNs) is to improve the operational efficiency in highly resource constrained environment based on dynamic and unpredictable behaviour of network parameters and applications requirement. In this paper we have proposed a method for clustering and their analysis to study the cluster formation, their behaviour with respect to the system parameters and applications requirement. The technique involves the adoption of computational intelligence to form clustering. We have used Nero-Fuzzy technique to obtain Dynamic clustering. The simulations are carried out to evaluate the performance of the proposed method with respect to different parameters of sensor node and applications requirement. © 2010 IEEE.

关键词： Sensor nodes

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Packet delay analysis of a wireless network with multiple relays under Rayleigh fading channels 10

Packet delay analysis of a wireless network with multiple re...

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5th International Conference on Queueing Theory and Network Applications, QTNA 2010

作者： Cho, Hong Ii Hwang, Gang Uk Department of Mathematical Sciences and Telecommunication Engineering Program Korea Advanced Institute of Science and Technology Daejeon Korea Republic of

ISBN: (纸本)9781450302128

In this paper, we consider a wireless network consisting of a source node, a destination node and multiple relay nodes under Rayleigh fading channels. Cooperative diversity of relay nodes is achieved by selecting an opportunistic relay node with the best channel condition to the destination node. To focus on the packet level performance in this paper, we analyze average packet delay of the network for various modulation and coding schemes. We assume that the arrival process of packets follows a Markov modulated Poission process (MMPP). To derive average packet delay, we first derive the distribution of the number of packets in the queue of the source node that are successfully transmitted to the destination node via a selected relay node. Using the distribution obtained above, an M/G/1 type queueing process is developed to model the queue at the source node. Average packet delay is then obtained from the stationary distribution of the queueing process of the source node by applying the Little's lemma. The detailed relations between average packet delay and network parameters such as average signal to noise ratios (SNRs) between nodes, the number of relay nodes and packet arrival rate, are investigated through numerical studies based on our analytical model. From our numerical results, we conclude that the optimal modulation and coding scheme that minimizes average packet delay depends not only on SNRs of channels between nodes but also on the arrival rate of packets at the data link layer. © 2010 ACM.

关键词： Signal to noise ratio

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