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10th Annual ACM/IEEE International Conference on Human-Robot Interaction, HRI 2015

作者： Cosgun, Akansel Maliki, Arnold Demir, Kaya Christensen, Henrik Georgia Tech Institute for Robotics and Intelligent Machines Atlanta United States Georgia Tech Mechanical Engineering Dept. Atlanta United States Georgia Tech Electrical and Computer Engineering Dept. Atlanta United States

ISBN: (纸本)9781450333184

Autonomous navigation is an essential capability for domestic service robots, however at times direct remote control may be desired for cases where robot and user are co-located. In this work, we propose a remote control method that allows a user to control the robot with smartphone gestures. The robot moves with respect to the user's coordinate frame and avoids obstacles if a collision is imminent. We think that interpreting the commands from human's perspective would decrease the cognitive load of the user, therefore allowing efficient operation. © 2015 Authors.

关键词： Remote control

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On the Star, Delta and Star-Delta Stator Winding Connections Tolerance to Voltage Unbalance

On the Star, Delta and Star-Delta Stator Winding Connections...

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IEEE International Electric Machines and Drives Conference

作者： Fernando J. T. E. Ferreira Dept. Electrical and Computer Engineering Institute of Systems and Robotics University of Coimbra

ISBN: (纸本)9781479979424

When a three-phase squirrel-cage induction motor is to be started with an electronic soft-starter, the respective stator winding can be designed for nominal power with delta, star or star-delta connection. If the motor has two sets of windings sharing the same slots, which may be connected in series or parallel, more connection modes are possible. In this paper, on the basis of a theoretical approach, simulations, and some experiments, a comparative analysis of the tolerance to voltage unbalance of the delta, star and star-delta stator winding connections is presented, offering a new perspective on this issue. It is demonstrated that, under unbalanced voltage supply condition, these stator winding connection modes have a different performance in terms of phase voltage and current unbalance ratios.

关键词： Delta Connection Star Connection Star-Delta Connection Stator Windings Three-Phase Induction Motor Voltage Unbalance

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computer-assisted surgical trainer for minimally invasive surgery

Computer-assisted surgical trainer for minimally invasive su...

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International Symposium on Applied Computational Intelligence and Informatics ( SACI)

作者： Ryszard Klempous Jan Nikodem Andrzej Wytyczak-Partyka Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland

The paper presents the current state of research on developing a computer-assisted surgical trainer to be used in a minimally-invasive surgery training program. Along with wide adoption of laparoscopic surgery a strong need for systematic training in the field of minimally-invasive surgery has developed. The goal of the described system is to provide surgeons specialising in minimally-invasive operating techniques an objective performance evaluation method and a safe setting for practicing elementary laparoscopic skills.

关键词： Training Three-dimensional displays Computed tomography Solid modeling Minimally invasive surgery Splines (mathematics)

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Object detection based on two level fast matching

International Journal of Multimedia and Ubiquitous Engineeri...

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International Journal of Multimedia and Ubiquitous engineering 2015年第12期10卷 381-394页

作者： Dou, Yumin Ye, Mao Xu, Pei Pei, Lishen Liu, Zhenghua School of Computer Science and Engineering Center for Robotics University of Electronic Science and Technology of China Chengdu China

Shape template matching is an important approach in object detection and recognition. In this paper, we propose a fast and novel object detection method, which represents edge map contours with salient points and retrieves the target object by using a backtracking method with two stages from coarse matching to fine matching. Our method has two main contributions. One is we propose the way to represent contour structure with salient points. The other is that the object detection method proposed can directly operate on the real images, which improves its practicability. According to the experimental results, the proposed approach improves the speed than previous works. © 2015 SERSC.

关键词： Template matching

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Knowledge engineering with Big Data

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IEEE Intelligent Systems 2015年第5期30卷 46-55页

作者： Wu, Xindong Chen, Huanhuan Wu, Gongqing Liu, Jun Zheng, Qinghua He, Xiaofeng Zhou, Aoying Zhao, Zhong-Qiu Wei, Bifang Gao, Ming Li, Yang Zhang, Qiping Zhang, Shichao Lu, Ruqian Zheng, Nanning School of Computer Science and Information Engineering Hefei University of Technology China University of Vermont United States University of Edinburgh School of Computer Science United Kingdom School of Computer Science University of Science and Technology of China China Department of Computer Science Xi'An Jiaotong University China Institute for Data Science and Engineering East China Normal University China Pennsylvania State University United States Fudan University China Department of Computer Science Zhejiang Gongshang University China Deakin University Australia Academy of Mathematics and Systems Science Chinese Academy of Sciences China Institute of Artificial Intelligence and Robotics Xi'An Jiaotong University China Keio University Japan

In the era of big data, knowledge engineering faces fundamental challenges induced by fragmented knowledge from heterogeneous, autonomous sources with complex and evolving relationships. The knowledge representation, acquisition, and inference techniques developed in the 1970s and 1980s, driven by research and development of expert systems, must be updated to cope with both fragmented knowledge from multiple sources in the big data revolution and in-depth knowledge from domain experts. This article presents BigKE, a knowledge engineering framework that handles fragmented knowledge modeling and online learning from multiple information sources, nonlinear fusion on fragmented knowledge, and automated demand-driven knowledge navigation. © 2001-2011 IEEE.

关键词： Intelligent systems

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Comparison of protection requirements in IE2-, IE3-, and IE4-class motors

Comparison of protection requirements in IE2-, IE3-, and IE4...

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IEEE International Electric Machines and Drives Conference, IEMDC 2015

作者： Ferreira, Fernando J. T. E. Leprettre, Benoit Duarte, Andre Q. De Almeida, Anibal T. Dept. Electrical and Computer Engineering Institute of Systems and Robotics University of Coimbra Polo II Coimbra3030-290 Portugal Schneider Electric Electropole 38EQI 38 Eybens France

ISBN: (纸本)9781479979417

In this paper, an overview of the main motor features influencing the protection devices settings is presented, pointing out key differences between three-phase direct-on-line motors of different efficiency classes. The results of experimental tests and simulations are presented and discussed in the scope of the motor protection against overload, short-circuit, current unbalance and locked-rotor conditions, for 7.5-kW, 4-pole, IE2- and IE3-class squirrel-cage induction motors and for IE4-class line-start permanent-magnet motors, offering important data related to their electrical and thermal behavior. Two commercial digital thermal-magnetic motor protection devices, whose thermal models were in most cases designed for IE1- and IE2-class motors, are evaluated in terms of operation effectiveness in the tested motors. This work is important for industry due to the significant penetration of IE3-class induction motors, as well as to the recent introduction in the market of IE4-class induction motors and line-start permanent magnet motors. © 2015 IEEE.

关键词： Circuit Breakers Induction Motor Induction Motor Inrush Current Line-Start PM Motor Locked Rotor Motor Protection Switchgears Undervoltage Voltage Unbalance

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Rewinding Strategy Aided by FEA as a Solution to Increase Efficiency of Industrial Motors

Rewinding Strategy Aided by FEA as a Solution to Increase Ef...

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International Conference on Electrical Machines

作者： V. P. B. Aguiar R. S. T. Pontes T. R. Fernandes Neto F. J. T. E. Ferreira Motor Driven Systems Laboratory Department of Electrical Engineering Federal University of Ceará Fortaleza CE 60440554 Brazil Institute of Systems and Robotics Department of Electrical and Computer Engineering University of Coimbra Coimbra Portugal

ISBN: (纸本)9781509025398

This paper presents a proper model and methodology to improve the efficiency class of a squirrel-cage induction motor during rewinding. The modeling approach is based on the finite element model, i.e. two-dimensional model coupled with the rotor equivalent circuit (first stage) and the stator equivalent circuit (second stage). Results obtained with finite element analysis are compared with those obtained with analytical calculations. It is demonstrated that, during rewinding, if an improved winding configuration is used, efficiency gains can be obtained, allowing to improve the efficiency class of the motor, from IE2 to IE3, respecting the specified limits of NEMA & IEC performance indicators, namely, breakdown torque, locked-rotor torque, and locked-rotor current. In 79% of the simulated cases the efficiency gain allowed the studied motor to reach the IE3 class.

关键词： Finite element analysis Equivalent circuits IEEE standards IEC standards ANSI standards Stator Induction motors Electromagnetic modeling Frequency-domain analysis

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EEG Signal Classification Based on Sparse Representation in Brain computer Interface Applications

EEG Signal Classification Based on Sparse Representation in ...

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Iranian Conference on Biomedical engineering

作者： Rasool Ameri Aliakbar Pouyan Vahid Abolghasemi Faculty of Computer Engineering and Information Technology University of Shahrood Faculty of Electrical Engineering and Robotics University of Shahrood

ISBN: (纸本)9781467393522

Brain-computer Interface (BCI) is a very essential and useful communication tool between the human brain and external devices. Effective and accurate classification of Electroencephalography (EEG) signals is important in performance of BCI systems. In this paper, a mental task classification approach based on sparse representation is proposed. A dictionary is used for classification, which is the combination of power spectral density calculated from EEG signal and common spatial pattern (CSP) algorithm. L1 minimization was used to classify EEG signals. Experimental results show that the proposed method provides higher classification performance compared to SVM and KNN classifiers. Based on the results average accuracy rates are as follows: 91.50%, 82.83%, 77.50% and 74%, for two, three, four and five classes, respectively.

关键词： Brain computer interface Electroencephalogram Mental task Sparse representation classification

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Effects of carbon dioxide on different PSK modulation formats of Optical Wireless Communications using USRP

Effects of carbon dioxide on different PSK modulation format...

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International Conference on Transparent Optical Networks

作者： Jan Vitasek Radek Martinek Ales Vanderka Lukas Hajek Jan Latal Zhenli Lu Bin Li Department of Telecommunications VSB-Technical University of Ostrava Ostrava Czech Republic Department of Cybernetics and Biomedical Engineering VSB-Technical University of Ostrava Ostrava Czech Republic Department of Telecommunications Faculty of Electrical Engineering and Computer Science VSB-Technical University of Ostrava 17. listopadu 15 708 33 Czech Republic State key Laboratoryof Robotics Chinese Academy of Sciences Shenyang China School of Electrical Engineering and Automation Changshu Instituteof Technology Changshu China

ISBN: (纸本)9781509014682

This article explores the influence of the concentrated carbon dioxide (CO 2 ) gas on the different Phase Shift Keying (PSK) modulations used for Optical Wireless Communication (OWC) links. In this work, the OWC consisted of a laser diode, a photodetector, and a transmission medium. The Universal Software Radio Peripheral (USRP) unit created and evaluated the PSK modulations. This unit modulated the laser diode on the transmitter side and demodulated the data which were received by the photodetector on the receiver side. The CO 2 gas was emitted as a consequence of sublimation of the solid carbon dioxide in hot water. The measurements were done in a closed box in laboratory. The CO 2 gas is a one element of smog which pollutes cities now and then. Our experimental results with CO 2 gas could help to choose a suitable modulation scheme for OWC which are installed in cities with smog-polluted atmospheric conditions.

关键词： Phase shift keying Carbon dioxide Optical receivers Diode lasers Integrated optics Optical transmitters

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Stochastic Models, Statistics and Their Applications: Wroclaw, Poland, February 2015

Stochastic Models, Statistics and Their Applications: Wrocla...

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12th Workshop on Stochastic Models, Statistics and their Applications, 2015

作者： Steland, Ansgar Szajowski, Krzysztof Rafajlowicz, Ewaryst Institute of Statistics RWTH Aachen University Aachen Germany Inst. of Mathematics and Computer Science Wroclaw University of Technology Wroclaw Poland Dept. of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland

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