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Optofluidic Systems: Miniaturized, Battery-Free Optofluidic Systems with Potential for Wireless Pharmacology and Optogenetics (Small 4/2018)

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Small 2018年第4期14卷

作者： Kyung Nim Noh Sung Il Park Raza Qazi Zhanan Zou Aaron D. Mickle Jose G. Grajales-Reyes Kyung-In Jang Robert W. Gereau IV Jianliang Xiao John A. Rogers Jae-Woong Jeong Department of Electrical and Computer Engineering University of Illinois at Urbana-Champaign Urbana IL 61801 USA Department of Electrical and Computer Engineering Texas A&M University College Station TX 77843 USA Center for Remote Health Science Technologies Texas A&M University College Station TX 77843 USA Department of Electrical Computer and Energy Engineering University of Colorado Boulder Boulder CO 80309 USA Department of Mechanical Engineering University of Colorado Boulder Boulder CO 80309 USA Department of Anesthesiology Washington University Pain Center Washington University School of Medicine St. Louis MO 63130 USA Department of Robotics Engineering Daegu Gyeongbuk Institute of Science and Technology (DGIST) Daegu 42988 Republic of Korea Department of Neuroscience Washington University Pain Center Washington University School of Medicine St. Louis MO 63130 USA Department of Materials Science and Engineering Biomedical Engineering Neurological Surgery Chemistry Mechanical Engineering Electrical and Computer Science Northwestern University Evanston IL 60208 USA Center for Bio-Integrated Electronics Simpson Querrey Institute for BioNanotechnology Northwestern University Evanston IL 60208 USA School of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea

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Stator Winding Short-Circuit Fault Diagnosis in Induction Motors using Random Forest

Stator Winding Short-Circuit Fault Diagnosis in Induction Mo...

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IEEE International Electric Machines and Drives Conference

作者： Tiago dos Santos Fernando J. T. E. Ferreira Joao Moura Pires Carlos Damasio Department of Computer Science NOVA-LINCS Nova University of Lisbon (FCT/UNL) Lisbon Portugal Dep. of Electrical and Computer Engineering Institute of Systems and Robotics University of Coimbra Coimbra Portugal

ISBN: (纸本)9781509042821

In this paper, an approach to detect stator winding short-circuit faults in squirrel-cage induction motors based on Random Forest and Park's Vector is proposed. This is accomplished by scoring the unbalance in the current and voltage waveforms as well as in Park's Vector, both for current and voltage. To score the unbalance in the d-q space, a Principal Component Analysis is applied to Park's Vector and with the first two principal components the eccentricity is calculated, while the first principal component is used to determine the phase in short-circuit. The proposed strategy has been experimentally tested on a special 400-V, 50-Hz, 4-pole, 2.2-kW induction motor with reconfigurable stator windings in which it was possible to emulate different types of inter-turn short-circuits. The results are quite promising, even only using 1-kHz sampling frequency to acquire the current and voltage waveforms in the three phases, and the use of the Fast Fourier Transform is avoided. The developed solution may be used for tele-monitoring of the motor condition and to implement advanced predictive maintenance strategies.

关键词： Fault diagnosis Induction motor Inter-turn short-circuit Stator winding PCA Predictive maintenance Machine learning Classification Random forest

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Multi-criteria optimisation design of shapers with piece-wise equally distributed time-delay

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IFAC-PapersOnLine 2016年第10期49卷 112-117页

作者： Pilbauer, Dan Michiels, Wim Vyhlidal, Tomas CIIRC - Czech Institute of Informatics Robotics and Cybernetics and Dept. of Instrumentation and Control Eng. Faculty of Mechanical Engineering Czech Technical University in Prague Technická 4 166 07 Praha 6 Czech Republic Department of Computer Science Katholieke Universiteit Leuven Celestijnenlaan 200A HeverleeB-3001 Belgium

The paper presents an optimisation based method to parametrize input shapers with time delays of piece-wise-equal distribution. The design respects the two key requirements on the shaper performance that are the prompt response time and the robustness represented by residual vibration functions, which are however conflicting criteria as a rule. Thus, the optimisation task is solved as a constrained multi-objective problem where the constraints respect the additional requirements on the shaper performance such as a non-decreasing step response or zero residual function at some frequency points. The result is a Pareto front that shows a trade-off between the two main requirements. Next to the presentation of the results in an example, a user friendly shaper-design tool is presented. © 2016

关键词： Multiobjective optimization computer control systems Constrained optimization Economic and social effects Time delay Timing circuits Distributed time delays Multi criteria optimisation Multi objective problem Pareto frontiers Residual functions Residual vibrations Signal shaper Vibration suppression

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Thin Films: Artificial Soft Elastic Media with Periodic Hard Inclusions for Tailoring Strain‐Sensitive Thin‐Film Responses (Adv. Mater. 40/2018)

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Advanced Materials 2018年第40期30卷

作者： Junghwan Byun Seungjun Chung Yongtaek Hong Department of Mechanical and Aerospace Engineering Institute of Advanced Machines and Design Soft Robotics Research Center (SRRC) Seoul National University Seoul 08826 Republic of Korea Photo‐Electronic Hybrids Research Center Korea Institute of Science and Technology (KIST) Seoul 02792 Republic of Korea Department of Electrical and Computer Engineering Inter‐University Semiconductor Research Center (ISRC) Seoul National University Seoul 08826 Republic of Korea

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Electronic Stuctures: Mechanically Guided Post‐Assembly of 3D Electronic Systems (Adv. Funct. Mater. 48/2018)

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Advanced Functional Materials 2018年第48期28卷

作者： Bong Hoon Kim Fei Liu Yongjoon Yu Hokyung Jang Zhaoqian Xie Kan Li Jungyup Lee Ji Yoon Jeong Arin Ryu Yechan Lee Do Hoon Kim Xueju Wang KunHyuck Lee Jong Yoon Lee Sang Min Won Nuri Oh Jeonghyun Kim Ju Young Kim Seong‐Jun Jeong Kyung‐In Jang Seungmin Lee Yonggang Huang Yihui Zhang John A. Rogers Department of Materials Science and Engineering Simpson Querrey Institute and Feinberg Medical School Center for Bio‐Integrated Electronics Northwestern University Evanston IL 60208 USA Center for Mechanics and Materials Center for Flexible Electronics Technology AML Department of Engineering Mechanics Tsinghua University Beijing 100084 China Frederick Seitz Materials Research Laboratory University of Illinois at Urbana‐Champaign Urbana IL 61801 USA Department of Civil and Environmental Engineering Mechanical Engineering and Materials Science and Engineering Northwestern University Evanston IL 60208 USA AML Department of Engineering Mechanics Center for Mechanics and Materials Tsinghua University Beijing 100084 China Division of Materials Science and Engineering Hanyang University Seoul 04763 Republic of Korea Department of Electronics Convergence Engineering Kwangwoon University Seoul 01897 Republic of Korea Multidisciplinary Sensor Research Group Electronics and Telecommunications Research Institute (ETRI) Daejeon 34129 Republic of Korea Department of Organic Materials and Fiber Engineering Department of Information Communication Materials and Chemistry Convergence Technology Soongsil University 369 Sangdo‐ro Dongjak‐gu Seoul 06978 Republic of Korea Department of Robotics Engineering Daegu Gyeongbuk Institute of Science and Technology (DGIST) Daegu 42988 Republic of Korea Department of Energy Electronics Convergence Kookmin University Seoul 02707 Republic of Korea Department of Civil and Environmental Engineering Mechanical Engineering Materials Science and Engineering Northwestern University Evanston IL 60208 USA Department of Materials Science and Engineering Department of Biomedical Engineering Department of Chemistry Department of Neurological Surgery Department of Mechanical Engineering Department of Electrical Engineering and Computer Science Simpson Querrey Institute and Feinberg Medical School Center for Bio‐Integrated Electronics Northwestern University Evanston IL 60208 USA

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Towards multi-functional light-weight long-term real-time coastal ocean observation system 11

Towards multi-functional light-weight long-term real-time co...

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11th ACM International Conference on Underwater Networks and Systems, WUWNet 2016

作者： Jiang, Zhenfeng Ma, Yanming Chen, Jiali Wang, Zigeng Peng, Zheng Liu, Jun Han, Guitao Smart Ocean Industry Research Institute Nantong Jiangsu226000 China Computer Science and Engineering Department University of Connecticut StorrsCT06269 United States Computer Science Deparment City College of New York NY10031 United States Computer Science and Technology Department Jilin University Changchun Jilin130012 China State Key Laboratory of Robotics Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai200240 China

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Robust Visual Fiducials for Skin-to-Skin Relative Ship Pose Estimation

Robust Visual Fiducials for Skin-to-Skin Relative Ship Pose ...

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OCEANS MTS/IEEE Monterey (Conference)

作者： Joshua G. Mangelson Ryan W. Wolcott Paul Ozog Ryan M. Eustice Robotics Institute at the University of Michigan Department of Electrical Engineering and Computer Science at the University of Michigan Department of Naval Architecture and Marine Engineering at the University of Michigan

ISBN: (纸本)9781509015276

This paper reports on an optical visual fiducial system developed for relative-pose estimation of two ships at sea. Visual fiducials are ubiquitous in the robotics literature, however none are specifically designed for use in outdoor lighting conditions. Blooming of the CCD causes a significant bias in the estimated pose of square tags that use the outer corners as point correspondences. In this paper, we augment existing state-of-the-art visual fiducials with a border of circles that enables high accuracy, robust pose estimation. We also present a methodology for characterizing tag measurement uncertainty on a per measurement basis. We integrate these methods into a relative ship motion estimation system and support our results using outdoor imagery and field data collected aboard the USNS John Glenn and USNS Bob Hope during skin-to-skin operations.

关键词： Cameras Marine vehicles Pose estimation Visualization Measurement uncertainty Two dimensional displays Matrix decomposition

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Improving motivation in a haptic teaching/learning framework

Improving motivation in a haptic teaching/learning framework

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作者： Fernández, Camino Esteban, Gonzalo Conde, Miguel Á. Garcia, Francisco School of Industrial Engineering and Computer Science Robotics Group University of León Campus de Vegazana S/N León24071 Spain Computer Science and Automatics Department Facultad de Ciencias University of Salamanca Plaza de los Caidos S/N Salamanca37008 Spain

Virtual reality simulators represent an affordable alternative for teaching and learning specific skills in environments not available in reality for educational purposes. Their goal is to provide a simulated environment where students can practice real tasks in a safer way and with no real consequences in fields as engineering or surgery. For a simulator to become a more complete teaching and learning tool, it should also include the expert knowledge required to provide instant feedback to the user. SHULE is a framework for building haptic simulators to be used with educational purposes that includes expert knowledge. In order to increase users' motivation, we have also considered game features in the framework design, development and integration with other tools. This process includes the elements needed to provide a challenging goal for the simulator with the correct amount of uncertainty that would increase user's curiosity enough to keep on using it until certain skill is achieved. Simulators produced withSHULEcan be integrated with a Learning Management System (LMS) such as Moodle by means of web services. Their functionality offers the teacher the possibility to create new activities to be performed at the simulator, and also offers the students the possibility to see the results of their simulator sessions in the LMS. © 2016 TEMPUS Publications.

关键词： Simulators

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Dynamic topologies for particle swarms 7

Dynamic topologies for particle swarms

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7th International Joint Conference on Computational Intelligence, IJCCI 2015

作者： Fernandes, Carlos M. Laredo, J.L.J. Merelo, J.J. Cotta, C. Rosa, A.C. LARSyS: Laboratory for Robotics and Systems in Engineering and Science University of Lisbon Lisbon Portugal Department of Architecture and Computer Technology University of Granada Granada Spain Departamento de Lenguages y Ciencias de la Computación University of Malaga Malaga Spain

ISBN: (纸本)9783662535240

The Particle Swarm Optimization (PSO) algorithm is a population-based metaheuristics in which the individuals communicate through decentralized networks. The network can be of many forms but traditionally its structure is predetermined and remains fixed during the search. This paper investigates an alternative approach. The particles are positioned on a 2-dimensional grid of nodes. During the run, they move through the network according to simple rules, while interacting with each other using signs that they leave on the nodes. The links between the particles – and consequently the information flow – are then defined at each time step by the position of the particle on the grid. As a result, each particle’s set of neighbors and connectivity degree varies during the search progress. The particles can move randomly or instead track signs left by other particles on the grid. In this paper, after a formal description of the general model, two different strategies (random and sign-based) are tested and compared to standard topologies on unimodal and multimodal functions, including a rotated and a shifted function with noise from the CEC benchmark. The experiments demonstrate that the dynamics provided by the proposed structure results in a more consistent and stable performance throughout the test set. The working mechanisms of the model are simple and easy to implement. © Springer-Verlag Berlin Heidelberg 2016.

关键词： Topology

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Social activity recognition based on probabilistic merging of skeleton features with proximity priors from RGB-D data

Social activity recognition based on probabilistic merging o...

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IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： Claudio Coppola Diego R. Faria Urbano Nunes Nicola Bellotto L-CAS School of Computer Science University of Lincoln (UK) Institute of Systems and Robotics Department of Electrical and Computer Engineering University of Coimbra Portugal

ISBN: (纸本)9781509037636

Social activity based on body motion is a key feature for non-verbal and physical behavior defined as function for communicative signal and social interaction between individuals. Social activity recognition is important to study human-human communication and also human-robot interaction. Based on that, this research has threefold goals: (1) recognition of social behavior (e.g. human-human interaction) using a probabilistic approach that merges spatio-temporal features from individual bodies and social features from the relationship between two individuals;(2) learn priors based on physical proximity between individuals during an interaction using proxemics theory to feed a probabilistic ensemble of activity classifiers;and (3) provide a public dataset with RGB-D data of social daily activities including risk situations useful to test approaches for assisted living, since this type of dataset is still missing. Results show that using the proposed approach designed to merge features with different semantics and proximity priors improves the classification performance in terms of precision, recall and accuracy when compared with other approaches that employ alternative strategies.

关键词： Feature extraction Skeleton Mixture models Robots Covariance matrices Probabilistic logic

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