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Photoluminescence spectroscopy investigation of epitaxial Si/GaSb nanocrystals/Si heterostructure

AIP Conference Proceedings 2017年第1期1874卷

作者： Dmitry L. Goroshko Alexander V. Shevlyagin Evgeniy A. Chusovitin Sergey A. Dotsenko Anton K. Gutakovskii M. Iinuma Y. Terai Evgeniy Yu. Subbotin Nikolay G. Galkin 1Institute of Automation and Control Processes FEB RAS 5 Radio St. 690041 Vladivostok Russia 2Far Eastern Federal University 8 Sukhanova St. 690950 Vladivostok Russia 3Rzhanov Institute of Semiconductor Physics SB RAS Lavrentieva Ave.13 Novosibirsk Russia 4Kyushu Institute of Technology Department of Computer Science and Electronics 680-4 Kawazu Iizuka Fukuoka 820-8502 Japan

Two-layer heterostructure with GaSb nanocrystals formed by solid phase epitaxy and embedded into the silicon was investigated using low-temperature (10-140 K) photoluminescence and time-resolved photoluminescence spectroscopies. Two characteristic luminescence bands with a maximum of about 0.82 and 0.87 eV were observed. It was found that low-energy peak is associated with D1 dislocation-related luminescence in silicon. Analysis of the decay components together with temperature and power dependencies of the photoluminescence for the high-energy maximum revealed that emission is more likely originated from the combined D2 dislocation centers in silicon and radiative recombination in type–II band alignment Si/GaSb nanocrystals/Si heterostructure. A nonradiative recombination dominates in all temperature range studied.

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Three-dimensional Non-holonomic Integrator control Design Applied to Induction Motors

Three-dimensional Non-holonomic Integrator Control Design Ap...

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第27届中国控制与决策会议

作者： Boja Grcar Peter Cafuta Gorazd Stumberger Anton Hofer University of Maribor Faculty of Electrical Engineering and Computer Science TU Graz Institute for Control and Automation

ISBN: (纸本)9781479970186

In the contribution new results in a control design of a general three-dimensional non-holonomic integrator(NHI) including drift terms is *** global asymptotic stability(GAS) proposed non-linear controller assure also minimal input norm during transients and in steady states and high dynamic in output response for a piecewise constant reference *** to appropriate input modulation internal states follow natural periodic orbits necessary to fulfill non-holonomic *** a non-linear transformation that describe error dynamics feedback stability is proven by using Lyapunov *** value of the proposed design is illustrated on the example of induction machine torque control along with a simulation and experimental results.

关键词： Three-dimensional non-holonomic integrator,Drift,Non-linear control,Minimal input norm,Non-linear transformations,Global stability,Lyapunov function,Induction motors control

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Identification of FIR Systems with Quantized Inputs and Observations

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IFAC-PapersOnLine 2015年第28期48卷 674-679页

作者： Guo, Jin Wang, Le Yi Yin, George Zhao, Yanlong Zhang, Ji-Feng School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing100083 China Department of Electrical and Computer Engineering Wayne State University DetroitMI48202 United States Department of Mathematics Wayne State University DetroitMI48202 United States Key Laboratory of Systems and Control Institute of Systems Science Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing100190 China

This paper introduces identification algorithms for finite impulse response systems under quantized output observations and general quantized inputs. While asymptotically efficient algorithms for quantized identification under periodic inputs are available, their counterpart under general inputs has encountered technical difficulties and evaded satisfactory resolutions. Under quantized inputs, this paper resolves this issue with constructive solutions. A two-step algorithm is developed, which demonstrates desired convergence properties including strong convergence, mean-square convergence, convergence rates, asymptotic normality, and asymptotical efficiency in terms of the Cramér-Rao lower bound. Some essential conditions on input excitation are derived that ensure identifiability and convergence. It is shown that by a suitable selection of the algorithm's weighting matrix, the estimates become asymptotically efficient. The strong and mean-square convergence rates are explicitly obtained. Optimal input design is discussed. Numerical examples are included to illustrate the main results of this paper © 2015

关键词： FIR filters Efficiency Identification (control systems) Impulse response Asymptotic efficiency Asymptotically efficient Finite impulse response system Identification algorithms Input design Mean square convergences non periodic input quantization

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Results of a real world trial with a mobile social service robot for older adults 16

Results of a real world trial with a mobile social service r...

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ACM/IEEE International Conference on Human-Robot Interaction (HRI)

作者： Jürgen Pripfl Tobias Körtner Daliah Batko-Klein Denise Hebesberger Markus Weninger Christoph Gisinger Susanne Frennert Hakan Eftring Margarita Antona Ilia Adami Astrid Weiss Markus Bajones Markus Vincze Akademie für Altersforschung am Haus der Barmherzigkeit Vienna Austria Zentrum für Geriatrische Medizin und Geriatrische Pflege Donau Universität Krems Krems Austria Department of Design Sciences Lund University Lund Sweden Institute of Computer Science (ICS) Foundation for Research and Technology - Hellas (FORTH) Heraklion Greece Automation and Control Institute (ACIN) Vienna University of Technology Vienna Austria

ISBN: (纸本)9781467383707

Robots are an increasingly discussed solution for assistance of seniors. Importance of testing natural interaction therefore becomes crucial. This paper presents first results of a study with an autonomous mobile social service robot prototype that was deployed in 18 private households of senior adults aged 75 years and older for a total of 371 days. Findings show that utility met the users' expectations. However, the robot was rather seen as a toy instead of being supportive for independent living. Furthermore, despite of an emergency function of the robot, perceived safety did not increase. Reasons for this might be the good health conditions of our users, a lack of technological robustness and slow performance of the prototype. However, users believed that a market ready version of the robot would be vital for supporting people who are more fragile and more socially isolated.

关键词： Prototypes Safety Service robots Mobile communication Usability Aging

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Three-dimensional non-holonomic integrator control design applied to induction motors

Three-dimensional non-holonomic integrator control design ap...

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Chinese control and Decision Conference, CCDC

作者： Boja Grčar Peter Cafuta Gorazd Štumberger Anton Hofer Faculty of Electrical Engineering and Computer Science University of Maribor Maribor Slovenia TU Graz Institute for Control and Automation Austria

In the contribution new results in a control design of a general three-dimensional non-holonomic integrator (NHI) including drift terms is proposed. Beside global asymptotic stability (GAS) proposed non-linear controller assure also minimal input norm during transients and in steady states and high dynamic in output response for a piecewise constant reference input. Due to appropriate input modulation internal states follow natural periodic orbits necessary to fulfill non-holonomic constraints. Introducing a non-linear transformation that describe error dynamics feedback stability is proven by using Lyapunov argumentation. Practical value of the proposed design is illustrated on the example of induction machine torque control along with a simulation and experimental results.

关键词： Torque Rotors Steady-state Stators Inductance control design Induction motors

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Saliency-based object discovery on RGB-D data with a late-fusion approach

Saliency-based object discovery on RGB-D data with a late-fu...

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IEEE International Conference on Robotics and automation (ICRA)

作者： Germán M. García Ekaterina Potapova Thomas Werner Michael Zillich Markus Vincze Simone Frintrop Rheinische Friedrich-Wilhelms-Universitat Bonn Bonn Nordrhein-Westfalen DE Automation and Control Institute TU Vienna Austria Institute of Computer Science III University of Bonn Germany

ISBN: (纸本)9781479969241

We present a novel method based on saliency and segmentation to generate generic object candidates from RGB-D data. Our method uses saliency as a cue to roughly estimate the location and extent of the objects present in the scene. Salient regions are used to glue together the segments obtained from over-segmenting the scene by either color or depth segmentation algorithms, or by a combination of both. We suggest a late-fusion approach that first extracts segments from color and depth independently before fusing them to exploit that the data is complementary. Furthermore, we investigate several mechanisms for ranking the object candidates. We evaluate on one publicly available dataset and on one challenging sequence with a high degree of clutter. The results show that we are able to retrieve most objects in real-world indoor scenes and clearly outperform other state-of-the art methods.

关键词： Image color analysis Image segmentation Three-dimensional displays Proposals Robots Support vector machines Color

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Stress-induced indirect to direct band gap transition in β-FeSi2 nanocrystals embedded in Si

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AIP Conference Proceedings 2017年第1期1874卷

作者： A. V. Shevlyagin D. L. Goroshko E. A. Chusovitin S. A. Balagan S. A. Dotsenko K. N. Galkin N. G. Galkin T. S. Shamirzaev A. K. Gutakovskii M. Iinuma Y. Terai 1Institute of Automation and Control Processes FEB RAS Radio St. 5 Vladivostok Russia 2Far Eastern Federal University School of Natural Sciences Sukhanova St. 8 Vladivostok Russia 3Rzhanov Institute of Semiconductor Physics SB RAS Lavrentieva Ave.13 Novosibirsk Russia 4Ural Federal University Mira St. 19 Yekaterinburg Russia 5Novosibirsk State University Pirogova St. 2 630090 Novosibirsk Russia 6Department of Computer Science and Electronics Kyushu Institute of Technology Iizuka Fukuoka 820-8502 Japan

Embedded in silicon β-FeSi2 nanocrystals (NCs) were grown on Si(111) by solid phase epitaxy of a thin iron film followed by Si molecular beam epitaxy. After solid phase epitaxy, a mixture of β-FeSi2 and ε-FeSi nanocrystals is formed on the surface, sometimes β and ε phases coexist inside one nanocrystal. During initial stage of Si molecular beam epitaxy all ε-FeSi transforms into β-FeSi2. β-FeSi2 nanocrystals tend to move following Si growth front. By adjusting growth condition, we manage to prevent the nanocrystals from moving and to fabricate 7-layer n-Si(111)/β-FeSi2_NCs/p+-Si silicon heterostructure with embedded β-FeSi2 NCs. An epitaxial relationship and a stress induced in the nanocrystals by silicon matrix were found to be suitable for indirect to direct band gap transition in β-FeSi2. Of the heterostructure, a n-i-p avalanche photodetector and a light-emitting diode were formed. They have shown relatively good performance: ultrabroadband photoresponse from the visible (400 nm) to short-wavelength infrared (1800 nm) ranges owing to quantum-confined Stark effect in the nanocrystals and optical emission power of up to 25 µW at 9 A/cm2 with an external quantum efficiency of 0.009% at room temperature owing to a direct fundamental transition in stressed β-FeSi2 nanocrystals.

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Optimal Microgrid Energy Management Integrating Intermittent Renewable Energy and Stochastic Load

Optimal Microgrid Energy Management Integrating Intermittent...

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2015 IEEE Advanced Information Technology,Electronic and automation control Conference(IAEAC 2015)

作者： Ying Ji Jianhui Wang Shijie Yan Wenzhong Gao Hepeng Li College of Information Science and Engineering Northeastern University Department of Electrical and Computer Engineering University of Denver Lab.of Networked Control Systems Shenyang Institute of AutomationChinese Academy of Sciences

ISBN: (纸本)9781479919819

In this paper,we focus on energy management of distributed generators(DGs) and energy storage system(ESS) in microgrids(MG) considering uncertainties in renewable energy and load *** MG energy management problem is formulated as a two-stage stochastic programming model based on optimization ***,the optimization model is decomposed into a mixed integer quadratic programming problem by using discrete stochastic scenarios to approximate the continuous random variables.A Scenarios generation approach based on time-homogeneous Markov chain model is proposed to generate simulated time-series of renewable energy generation and load ***,the proposed stochastic programming model is tested in a typical LV network and solved by Matlab optimization *** simulation results show that the proposed stochastic programming model has a better performance to obtain robust scheduling solutions and lower the operating cost compared to the deterministic optimization modeling methods.

关键词： microgrid EMS Markov chain stochastic optimization

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Fourth international symposium on "new frontiers in human-robot interaction": 21-22 April 2015, canterbury, UK

Fourth international symposium on "new frontiers in human-ro...

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AISB Convention 2015

作者： Salem, Maha Weiss, Astrid Baxter, Paul Dautenhahn, Kerstin School of Computer Science University of Hertfordshire College Lane Hatfield HertfordshireAL10 9AB United Kingdom ACIN Institute of Automation and Control Vienna University of Technology Gusshausstrae 27-29/E376 Vienna1040 Austria Centre for Robotics and Neural Systems Cognition Institute Plymouth University Plymouth DevonPL4 8AA United Kingdom

The Symposium on "New Frontiers in Human-Robot Interaction (HRI)" is the fourth of a series of symposia held in conjunction with the AISB convention. Its topics cover cutting-edge interdisciplinary research on understanding, designing, and evaluating robotic systems for and with humans. Its main difference to other HRI-related conferences and workshops is its inclusiveness for exploratory research and the amount of time for open discussion. This year's symposium consists of six sessions covering topics such as verbal and non-verbal interaction, people's perception of robots, and ethical issues. Moreover, it includes keynote talks by Mark Coeckelbergh and Angelika Peer and a panel on the topic "Robot Perception and Acceptance".

关键词： Human robot interaction

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How the Sensitivity Measures can be Computed for Different Youla Regulators

How the Sensitivity Measures can be Computed for Different Y...

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International Conference on Cybernetics and Intelligent Systems

作者： L. Keviczky Cs. Bányász Institute of Computer Science and Automation MTA-BME Control Engineering Research Group Hungarian Academy of Sciences H-1111 Budapest Kende u 13-17 HUNGARY Institute of Computer Science and Automa tion MTA-BME Control Engineering Research Group Hungarian Academy of Sciences H-1111 Budapest Kende u 13-17 HUNGARY

Different sensitivity measures are investigated for YOULA-parameterized regulators and the influence of a new observer topology is treated

ISBN: (纸本)9781467373395

Different sensitivity measures are investigated for YOULA-parameterized regulators and the influence of a new observer topology is treated

关键词： Youlaparameterization Youla regulator sensitivity observer state-feedback model error

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