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2014 Annual Conference of the Prognostics and Health Management Society, PHM 2014

作者： Mahadevan, Nagabhushan Dubey, Abhishek Karsai, Gabor Srivastava, Anurag Liu, Chen-Ching Institute for Software-Integrated Systems Vanderbilt University NashvilleTN37212 United States School of Electrical Engineering and Computer Science Washington State University PullmanWA99163 United States

ISBN: (纸本)9781936263172

Resilient and reliable operation of cyber physical systems of societal importance such as Smart Electric Grids is one of the top national priorities. Due to their critical nature, these systems are equipped with fast-acting, local protection mechanisms. However, commonly misguided protection actions together with system dynamics can lead to un-intentional cascading effects. This paper describes the ongoing work using Temporal Causal Diagrams (TCD), a refinement of the Timed Failure Propagation Graphs (TFPG), to diagnose problems associated with the power transmission lines protected by a combination of relays and breakers. The TCD models represent the faults and their propagation as TFPG, the nominal and faulty behavior of components (including local, discrete controllers and protection devices) as Timed Discrete Event systems (TDES), and capture the cumulative and cascading effects of these interactions. The TCD diagnosis engine includes an extended TFPG-like reasoner which in addition to observing the alarms and mode changes (as the TFPG), monitors the event traces (that correspond to the behavioral aspects of the model) to generate hypotheses that consistently explain all the observations. In this paper, we show the results of applying the TCD to a segment of a power transmission system that is protected by distance relays and breakers.

关键词： Cyber Physical System

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Implicational rewriting tactics in HOL

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5th International Conference on Interactive Theorem Proving, ITP 2014 - Held as Part of the Vienna Summer of Logic, VSL 2014

作者： Aravantinos, Vincent Tahar, Sofiène Software and Systems Engineering Fortiss GmbH Guerickestraße 25 80805 Munich Germany Electrical and Computer Engineering Dept. Concordia University 1455 De Maisonneuve Blvd. W. Montreal QC Canada

ISBN: (纸本)9783319089690

Reducing the distance between informal and formal proofs in interactive theorem proving is a long-standing matter. An approach to this general topic is to increase automation in theorem provers: indeed, automation turns many small formal steps into one big step. In spite of the usual automation methods, there are still many situations where the user has to provide some information manually, whereas this information could be derived from the context. In this paper, we characterize some very common use cases where such situations happen, and identify some general patterns behind them. We then provide solutions to deal with these situations automatically, which we implemented as HOL Light and HOL4 tactics. We find these tactics to be extremely useful in practice, both for their automation and for the feedback they provide to the user. © 2014 Springer International Publishing.

关键词： Automation

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Formal verification of optical quantum flip gate

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5th International Conference on Interactive Theorem Proving, ITP 2014 - Held as Part of the Vienna Summer of Logic, VSL 2014

作者： Mahmoud, Mohamed Yousri Aravantinos, Vincent Tahar, Sofiène Electrical and Computer Engineering Dept. Concordia University 1455 De Maisonneuve Blvd. W. Montreal QC Canada Software and Systems Engineering Fortiss GmbH Gürickestraße 25 80805 Munich Germany

ISBN: (纸本)9783319089690

Quantum computers are promising to efficiently solve hard computational problems, especially NP problems. In this paper, we propose to tackle the formal verification of quantum circuits using theorem proving. In particular, we focus on the verification of quantum computing based on coherent light, which is typically light produced by laser sources. We formally verify the behavior of the quantum flip gate in HOL Light: we prove that it can flip a zero-quantum-bit to a one-quantum-bit and vice versa. To this aim, we model two optical devices: the beam splitter and the phase conjugating mirror and prove relevant properties about them. Then by cascading the two elements and utilizing these properties, the complete model of the flip gate is formally verified. This requires the formalization of some fundamental mathematics like exponentiation of linear transformations. © 2014 Springer International Publishing.

关键词： Quantum optics

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Hybrid Vehicle Simulation System with discrete-event modeling and simulation

Hybrid Vehicle Simulation System with discrete-event modelin...

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Annual IEEE systems Conference

作者： Shafagh Jafer Jeanette Benjamin Department of Electrical Computer Systems Software Engineering Embry-Riddle Aeronautical University FL

Embry-Riddle Aeronautical University (ERAU) is one of fifteen schools across the United States and Canada that qualify to compete in the EcoCAR competitions. One of the major tasks of the ERAU EcoCAR team, besides to produce a working vehicle that fits the required hybrid vehicles, is to ensure predictions of the car's performance. In this paper we present the use of the Discrete-Event System Specification (DEVS) formalism to simulate the physical hybrid car in its current state. We have modeled the car and manipulated various inputs and conducted simulation results that in theory match with those of the physical car. The proposed Hybrid Vehicle Simulation System produces scientifically sound results in theory that can be verified and validated. Development is performed at a system level, identifying the major contributing components, connecting those components as it is in the physical car, and simulating the various inputs and outputs of each component. The behavior of each component is analyzed as data is injected into it and the results are documented. Test plans are formulated to test each component (unit) under different conditions. The produced simulation will be incrementally replaced with actual hardware components of the car. This work benefits from a number of modeling and simulation concepts such as: component-oriented model-based development, model-continuity, and incremental replacement.

关键词： Batteries Engines Traction motors Atmospheric modeling Wheels Generators System-on-chip

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An Efficient Adaptive Beamforming Technique for Operation in Frequency-Selective Channels

An Efficient Adaptive Beamforming Technique for Operation in...

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National Wireless Research Collaboration Symposium (NWRCS)

作者： Thomas Yang Wenbo Dong Electrical Computer Software and Systems Engineering Embry-Riddle Aeronautical University Daytona Beach Florida

This paper presents an efficient adaptive beam forming technique for Quadrature Amplitude Modulation (QAM) receivers operating in frequency-selective channel environments. In order to mitigate the Inter-Symbol Interference (ISI) resulted from the wireless channel's frequency-selectivity, the proposed method adopts multi-tap filters at all receiver branches, and converts the weight matrix into a long vector to facilitate efficient weight update using a recently proposed beam forming algorithm, which automatically generates a time-varying weight update at each iteration. computer simulations are performed in MATLAB to validate the effectiveness of the proposed technique, which successfully suppresses frequency selectivity-induced ISI, while single-tap beam forming algorithms fail to converge in the presence of ISI.

关键词： Array signal processing Vectors Receivers Least squares approximations Wireless communication Filtering algorithms Signal processing algorithms

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25th Annual Computational Neuroscience Meeting CNS-2016, Seogwipo City, South Korea, July 2-7, 2016 Abstracts

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BMC NEUROSCIENCE 2016年第1期17卷 1-112页

作者： [Anonymous] Computational Neurobiology Laboratory The Salk Institute for Biological Studies San Diego USA UNIC CNRS Gif sur Yvette France The European Institute for Theoretical Neuroscience (EITN) Paris France ATR Computational Neuroscience Laboratories Kyoto Japan Krembil Research Institute University Health Network Toronto Canada Department of Physiology University of Toronto Toronto Canada Department of Medicine (Neurology) University of Toronto Toronto Canada Department of Physics University of New Hampshire Durham USA Department of Neurophysiology Nencki Institute of Experimental Biology Warsaw Poland Department of Theory Wigner Research Centre for Physics of the Hungarian Academy of Sciences Budapest Hungary Department of Mathematical Sciences KAIST Daejoen Republic of Korea Department of Mathematics University of Houston Houston USA Department of Biochemistry & Cell Biology and Institute of Biosciences and Bioengineering Rice University Houston USA Department of Biology and Biochemistry University of Houston Houston USA Grupo de Neurocomputación Biológica Dpto. de Ingeniería Informática Escuela Politécnica Superior Universidad Autónoma de Madrid Madrid Spain Department of Biological Sciences University of Southern California Los Angeles USA Center for Neuroscience Korea Institute of Science and Technology Seoul South Korea Department of Neurology Albert Einstein College of Medicine Bronx USA Center for Neuroscience KIST Seoul South Korea Department of Neuroscience University of Science and Technology Daejon South Korea Systems Neuroscience Group QIMR Berghofer Medical Research Institute Herston Australia Department of Psychology Yonsei University Seoul South Korea Department of Psychiatry Kyung Hee University Hospital at Gangdong Seoul South Korea Department of Psychiatry Veterans Administration Boston Healthcare System and Harvard Medical School Brockton USA Department of Electrical and Electronic Engineering The University of Melbourne Parkvil

A1 Functional advantages of cell-type heterogeneity in neural circuits Tatyana O. Sharpee A2 Mesoscopic modeling of propagating waves in visual cortex Alain Destexhe A3 Dynamics and biomarkers of mental disorders Mitsuo Kawato F1 Precise recruitment of spiking output at theta frequencies requires dendritic h-channels in multi-compartment models of oriens-lacunosum/moleculare hippocampal interneurons Vladislav Sekulić, Frances K. Skinner F2 Kernel methods in reconstruction of current sources from extracellular potentials for single cells and the whole brains Daniel K. Wójcik, Chaitanya Chintaluri, Dorottya Cserpán, Zoltán Somogyvári F3 The synchronized periods depend on intracellular transcriptional repression mechanisms in circadian clocks. Jae Kyoung Kim, Zachary P. Kilpatrick, Matthew R. Bennett, Kresimir Josić O1 Assessing irregularity and coordination of spiking-bursting rhythms in central pattern generators Irene Elices, David Arroyo, Rafael Levi, Francisco B. Rodriguez, Pablo Varona O2 Regulation of top-down processing by cortically-projecting parvalbumin positive neurons in basal forebrain Eunjin Hwang, Bowon Kim, Hio-Been Han, Tae Kim, James T. McKenna, Ritchie E. Brown, Robert W. McCarley, Jee Hyun Choi O3 Modeling auditory stream segregation, build-up and bistability James Rankin, Pamela Osborn Popp, John Rinzel O4 Strong competition between tonotopic neural ensembles explains pitch-related dynamics of auditory cortex evoked fields Alejandro Tabas, André Rupp, Emili Balaguer-Ballester O5 A simple model of retinal response to multi-electrode stimulation Matias I. Maturana, David B. Grayden, Shaun L. Cloherty, Tatiana Kameneva, Michael R. Ibbotson, Hamish Meffin O6 Noise correlations in V4 area correlate with behavioral performance in visual discrimination task Veronika Koren, Timm Lochmann, Valentin Dragoi, Klaus Obermayer O7 Input-location dependent gain modulation in cerebellar nucleus neurons Maria Psarrou, Maria Schilstra, Neil Davey, Benjamin Torben-Ni

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A Search-based Approach for Cost-Effective software Test Automation Decision Support and an Industrial Case Study

A Search-based Approach for Cost-Effective Software Test Aut...

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IEEE International Conference on software Testing, Verification and Validation Workshops

作者： Yasaman Amannejad Vahid Garousi Rob Irving Zahra Sahaf Software Quality Engineering Research Group (SoftQual) Department of Electrical and Computer Engineering University of Calgary Pason Systems Corporation

ISBN: (纸本)9781479957910

Test automation is a widely-used approach to reduce the cost of manual software testing. However, if it is not planned or conducted properly, automated testing would not necessarily be more cost effective than manual testing. Deciding what parts of a given System Under Test (SUT) should be tested in an automated fashion and what parts should remain manual is a frequently-asked and challenging question for practitioner testers. In this study, we propose a search-based approach for deciding what parts of a given SUT should be tested automatically to gain the highest Return On Investment (ROI). This work is the first systematic approach for this problem, and significance of our approach is that it considers automation in the entire testing process (i.e., from test-case design, to test scripting, to test execution, and test-result evaluation). The proposed approach has been applied in an industrial setting in the context of a software product used in the oil and gas industry in Canada. Among the results of the case study is that, when planned and conducted properly using our decision-support approach, test automation provides the highest ROI. In this study, we show that if automation decision is taken effectively, test-case design, test execution, and test evaluation can result in about 307%, 675%, and 41% ROI in 10 rounds of using automated test suites.

关键词： Action research Cost-benefit analysis Industrial case study Search-based software engineering software test automation

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Nuclear norm minimization in subspace based continuous-time Hammerstein system identification

Nuclear norm minimization in subspace based continuous-time ...

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11th IEEE International Conference on Control and Automation, IEEE ICCA 2014

作者： Dai, Mingxiang Zhang, Jingxin Chai, Li Science and Technology on Transient Physics Laboratory Nanjing University of Science and Technology Nanjing 210094 China School of Software and Electrical Engineering Swinburne University of Technology VIC3211 Australia School of Information Science and Engineering Wuhan University of Science and Technology Wuhan 430081 China Dept of Electrical and Computer Systems Engineering Monash University VIC 3800 Australia

ISBN: (纸本)9781479928378

A novel method combining the nuclear norm minimization (NNM) and continuous-time (CT) subspace identification method (CSIM) is proposed to identify the CT Hammerstein model with little priori information. The nuclear norm minimization, which is the heuristic convex relaxation of the minimum rank constraint, is applied to the CT subspace identification method, for the purpose of improving the robustness and accuracy of identification. The proposed method can perform the identification well without the priori information about the Hammerstein model, which not only reduces the complexity of the identification problem but also broaden its applications. The nonlinear block of Hammerstein model is approximated with the pseudospectral method, which replaces the nonlinear function with Lagrange basis functions. A typical numerical example is presented to verify the NNMCSI method and the identification results are compared with the refined instrumental variable method. © 2014 IEEE.

关键词： Functions

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Characterization of on-body communication channel for vertical and horizontal polarization of center fed dipole at GSM frequency

Characterization of on-body communication channel for vertic...

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IEEE Region 10 Symposium

作者： Muhammad Irfan Khattak Robert Edwards Muhammad Shafi Department of Electrical Engineering University of Engineering and Technology Peshawar Pakistan Electrical and Systems Engineering Loughborough University UK Department of Computer Software Engineering University of Engineering and Technology Peshawar Pakistan

ISBN: (纸本)9781479920297

While designing a wearable antenna for on-body communications, particular importance is given to lessen the lossy effects of the human body on transmission coefficient. This paper presents experimental and simulation results for two different polarizations of center-fed dipole antenna on human body at mobile communication frequency. The isolated parameter is S 21 (dB). Early results suggest that vertical polarization of dipole gives better transmission coefficient than horizontal polarization.

关键词： Dipole antennas Antenna measurements Biological system modeling Transmitting antennas Educational institutions

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A Hybrid Task Graph Scheduler for High Performance Image Processing Workflows

A Hybrid Task Graph Scheduler for High Performance Image Pro...

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IEEE Global Conference on Signal and Information Processing

作者： Timothy Blattner Walid Keyrouz Milton Halem Mary Brady Shuvra S. Bhattacharyya Software and Systems Division National Institute of Standards and Technology Gaithersburg MD 20899 Center for Hybrid Multicore Productivity Research University of Maryland Baltimore County Baltimore MD 21250 Department of Electrical and Computer Engineering University of Maryland College Park MD 20742

ISBN: (纸本)9781479975921

Designing applications for scalability is key to improving their performance in hybrid and cluster computing. Scheduling code to utilize parallelism is difficult, particularly when dealing with data dependencies, memory management, data motion, and processor occupancy. The Hybrid Task Graph Scheduler (HTGS) increases programmer productivity when implementing hybrid workflows that scale to multi-core and multi-GPU systems. HTGS manages dependencies between tasks, represents CPU and GPU memories independently, overlaps computations with disk I/O and memory transfers, keeps multiple GPUs occupied, and uses all available compute resources. We present an implementation of hybrid microscopy image stitching using HTGS that reduces code size by ≈ 25% and shows favorable performance compared to a similar hybrid workflow implementation without HTGS. The HTGS-based implementation reuses the computational functions of the hybrid workflow implementation.

关键词： Image processing Heterogeneous architectures Task graphs Hybrid workflows

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