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IEEE International Conference on Networking, Sensing and Control

作者： Wenqi Guo William M. Healy Meng Chu Zhou Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ USA National Institute for Standards and Technology Gaithersburg MD USA Key Laboratory of Embedded System and Service Computing Ministry of Education University of Tongji Shanghai China ECE Department New Jersey Institute of Technology Newark NJ USA

Sensor nodes in wireless networks often use batteries as their source of energy, but replacing or recharging exhausted batteries in a deployed network can be difficult and costly. Therefore, prolonging battery life becomes a principal objective in the design of wireless sensor networks (WSNs). There is little published data that quantitatively analyze a sensor node's lifetime under different operating conditions. This paper presents several experiments to quantify the impact of key wireless sensor network design and environmental parameters on battery performance. Our testbed consists of MicaZ motes, commercial alkaline batteries, and a suite of techniques for measuring battery performance. We evaluate known parameters, such as communication distance, working channel and operating power that play key roles in battery performance. Through extensive real battery discharge measurements, we expect our results to serve as a quantitative basis for future research in designing and implementing battery-efficient sensing applications and protocols.

关键词： Batteries Wireless sensor networks Discharges (electric) Sensor phenomena and characterization Battery charge measurement Voltage measurement

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On the Development of Global Plasma-Ionosphere FDTD Algorithms for Electromagnetic Calculations in the Earth- Ionosphere System

On the Development of Global Plasma-Ionosphere FDTD Algorith...

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International Conference on Electromagnetics in Advanced Applications

作者： Yaxin Yu Jamesina J. Simpson Erping Li Institute of High Performance Computing Agency for Science Technology and Research (A*STAR) 1 Fusionopolis Way #16-16 Connexis North Tower Singapore 138632 Electrical and Computer Engineering Department University of New Mexico Albuquerque NM 87106 USA

ISBN: (纸本)9781467303330

This paper reports the development of global FDTD models incorporated with a quasi-real anisotropic ionosphere consisting of magnetized cold plasmas. Compared to the existing global models utilizing simple conductivity ionospheric profiles, the algorithms reported in this paper can sufficiently extend the global-scale electromagnetic simulations to much higher altitudes as the physics introduced by the spatially-varied ionospheric plasmas and the geomagnetic field can be fully included in calculations.

关键词： paper reports global FDTD extend the global-scale

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Left conjugate product of polynomial matrices and solutions to the dual Sylvester-conjugate matrix equations

Left conjugate product of polynomial matrices and solutions ...

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Australian Control Conference (AUCC)

作者： Ai-Guo Wu Ye Chen Victor Sreeram Wanquan Liu Tyrone Fernando Shenzhen Key Laboratory of Wind Power and Smart Grid Harbin Institute of Technology Shenzhen Graduate School Shenzhen China School of Electrical Electronic and Computer Engineering University of West Australia Perth Australia Department of Computing Curtin University Perth Australia

In this paper, the concept of left conjugate product is first presented. Some interesting properties of the concept are then derived. Using left conjugate product as a tool, we investigate dual Sylvester-conjugate matrix equations which include Lyapunov matrix equations and generalized Sylvester-observer matrix equations as special cases. An explicit solution of this matrix equation is presented with a free parameter matrix.

关键词： Polynomials Mathematical model Algorithm design and analysis Australia Educational institutions Linear systems

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Handwritten and Machine Printed Text Separation in Document Images Using the Bag of Visual Words Paradigm

Handwritten and Machine Printed Text Separation in Document ...

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International Workshop on Frontiers in Handwriting Recognition

作者： Konstantinos Zagoris Ioannis Pratikakis Apostolos Antonacopoulos Basilis Gatos Nikos Papamarkos Pattern Recognition and Image Analysis (PRImA) Research Laboratory School of Computing Science and Engineering University of Salford Greater Manchester UK Department of Electrical and Computer Engineering Democritus University of Thrace Xanthi Greece Institute of Informatics and Telecommunications National Center for Scientific Research Demokritos Athens Greece

In a number of types of documents, ranging from forms to archive documents and books with annotations, machine printed and handwritten text may be present in the same document image, giving rise to significant issues within a digitisation and recognition pipeline. It is therefore necessary to separate the two types of text before applying different recognition methodologies to each. In this paper, a new approach is proposed which strives towards identifying and separating handwritten from machine printed text using the Bag of Visual Words paradigm (BoVW). Initially, blocks of interest are detected in the document image. For each block, a descriptor is calculated based on the BoVW. The final characterization of the blocks as Handwritten, Machine Printed or Noise is made by a Support Vector Machine classifier. The promising performance of the proposed approach is shown by using a consistent evaluation methodology which couples meaningful measures along with a new dataset.

关键词： Visualization Noise Image segmentation Hidden Markov models Gabor filters Handwriting recognition Text recognition

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Monolithic Source of Photon Pairs

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Physical Review Letters 2012年第15期108卷 153605-153605页

作者： Rolf Horn Payam Abolghasem Bhavin J. Bijlani Dongpeng Kang A. S. Helmy Gregor Weihs Institute for Quantum Computing and Department of Physics and Astronomy University of Waterloo 200 University Avenue W Waterloo Ontario N2L 3G1 Canada The Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto 10 King’s College Road Toronto Ontario M5S 3G4 Canada Institut für Experimentalphysik Universität Innsbruck Technikerstraße 25 6020 Innsbruck Austria

The creation of monolithically integratable sources of single and entangled photons is a top research priority with formidable challenges: The production, manipulation, and measurement of the photons should all occur in the same material platform, thereby fostering stability and scalability. Here we demonstrate efficient photon pair production in a semiconductor platform, gallium arsenide. Our results show type-I spontaneous parametric down-conversion of laser light from a 2.2 mm long Bragg-reflection waveguide, and we estimate its internal pair production efficiency to be 2.0×10−8 (pairs/pump photon). This is the first time that significant pair production has been demonstrated in a structure that can be electrically self-pumped and which can form the basis for passive optical circuitry, bringing us markedly closer to complete integration of quantum optical technologies.

关键词： Gallium arsenide

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics): Preface

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2012年 7490 LNCS卷 V-VII页

作者： Träff, Jesper Larsson Benkner, Siegfried Dongarra, Jack Vienna University of Technology Faculty of Informatics Institute of Information Systems Favoritenstr. 16 1040 Vienna Austria University of Vienna Faculty of Computer Science Research Group Scientific Computing Währinger Str. 29/6.21 1090 Vienna Austria University of Tennessee Department of Electrical Engineering and Computer Science Knoxville TN 37996 United States

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An Adaptive and Cost-Effective Data Transmission Framework Using MMS Technology for Client-Server Application

International Journal of Interactive Mobile Technologies

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International Journal of Interactive Mobile Technologies 2012年第1期6卷 25-32页

作者： Setyono, A. Alam, M.J. Eswaran, C. Faculty of Information technology Multimedia University Cyberjaya Malaysia Faculty of Computer Science Dian Nuswantoro University Semarang Indonesia Faculty of Information Technology Center for Multimedia Computing Multimedia University Cyberjaya Malaysia Department of electrical engineering Indian Institute of Technology Madras India

Limitation of message size of the MMS technology is one of the important factors which make this technology less attractive. This limitation restricts the system developers in developing new mobile applications using MMS technology. This research attempts to improve the capacity of the maximum message size by implementing compression, splitting and cropping techniques for MMS application on the mobile phone devices. This paper presents the architecture to enhance the multimedia capabilities of the MMS technology and also the implementation details for developing client-server system applications. The modified MMS technology can be used to develop practical client-server applications. © 2012, International Federation of engineering Education Societies (IFEES). All rights reserved.

关键词： Cost effectiveness

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A pipeline for the Simulation of Transcranial Direct Current Stimulation for Realistic Human Head Models using SCIRun/BioMesh3D

A pipeline for the Simulation of Transcranial Direct Current...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society

作者： Moritz Dannhauer Dana Brooks Don Tucker Rob MacLeod is with Scientific Computing and Imaging Institute 72 So. Central Campus Drive Salt Lake City Utah 84112 USA Department of Electrical and Computer Engineering 409 Dana Center 360 Huntington Avenue Boston MA 02115 USA Department of Psychology Clinical Cognitive Neuroscience University of Oregon

ISBN: (纸本)9781424441198

The current work presents a computational pipeline to simulate transcranial direct current stimulation from image based models of the head with SCIRun [15]. The pipeline contains all the steps necessary to carry out the simulations and is supported by a complete suite of open source software tools: image visualization, segmentation, mesh generation, tDCS electrode generation and efficient tDCS forward simulation.

关键词： the Simulation SCIRun/BioMesh3D segmentation

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Photonic crystals in proton-exchanged LiNbO3 waveguides for photonic applications

Photonic crystals in proton-exchanged LiNbO3 waveguides for ...

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IEEE PhotonicsGlobal@Singapore, IPGC

作者： Deng Jun Jia Wei Vanga Sudheer Kumar Ching Eng Png Andrew A. Bettiol Aaron J. Danner Institute of High Performance Computing Agency for Science Technology and Research (ASTAR) Singapore Department of Electrical and Computer Engineering National University of Singapore Singapore Henan Key Laboratory of Laser and O pto-electric Information Technology Zhengzhou University Henan China Department of Physics National University of Singapore Singapore

Photonic crystals realized in LiNbO 3 have a great potential to reduce the size and increase the functionality of integrated optical devices. In order to accomplish these aims, fabrication know-how must be mastered yet it remains relatively uncharted. In this work we report the fabrication and optical characterization of photonic crystal structures in annealed proton exchanged (APE) LiNbO 3 waveguides. In our work, channel waveguides were fabricated by photolithography patterning followed by immersing LiNbO 3 wafers in molten benzoic acid at 235°C for 5 h. The thickness and the composition profiles of the APE waveguides were measured using the secondary ion mass spectroscopy (SIMS) method. The experimental characterization of the photonic crystal waveguides was performed and a photonic stop band with good sharpness can be observed from the transmission spectra.

关键词： Photonics Optical fibers Optical device fabrication Optical imaging Optical polarization

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Maximally permissive control of flexible manufacturing systems with fewest disjunctive constraints

Maximally permissive control of flexible manufacturing syste...

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International Conference on Advanced Mechatronic Systems (ICAMechS)

作者： YuFeng Chen MengChu Zhou XiaoOu Li School of Electro-Mechanical Engineering Xidian University Xi'an China Key Laboratory of Embedded System and Service Computing Ministry of Education University of Tongji Shanghai China Department of Electrical and Computer Engineering New Jersey Institute of Technology Newark NJ USA Departamento de Computacion CINVESTAVIPN Mexico Distrito Federal Mexico

For Petri net models whose legal reachability spaces are non-convex, one cannot optimally control them by the conjunctions of linear constraints. This work proposes a method to find a set of linear constraints such that each constraint can forbid all first-met bad markings and every legal marking satisfies at least one constraint. Then, the disjunctions of the obtained constraints can make all legal markings reachable and forbid all first-met bad markings, i.e., the controlled net is live and maximally permissive. The work also develops an integer linear programming model to minimize the number of the constraints. Finally, an example is provided to illustrate the proposed method.

关键词： Law Optimal control Vectors Aerospace electronics Petri nets System recovery

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