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Data-driven gradient algorithm for high-precision quantum control

Physical Review A 2018年第4期97卷 042122-042122页

作者： Re-Bing Wu Bing Chu David H. Owens Herschel Rabitz Department of Automation Tsinghua University Beijing 100084 China Center for Quantum Information Science and Technology BNRist Beijing 100084 China School of Electronic and Computer Science University of Southampton Southampton SO17 1BJ United Kingdom Department of Automation Zhengzhou University Zhengzhou 450001 China Department of Automatic Control and Systems Engineering University of Sheffield Mappin Street Sheffield S1 3JD United Kingdom Department of Chemistry Princeton University Princeton 08544 NJ United States

In the quest to achieve scalable quantum information processing technologies, gradient-based optimal control algorithms (e.g., grape) are broadly used for implementing high-precision quantum gates, but their performance is often hindered by deterministic or random errors in the system model and the control electronics. In this paper, we show that grape can be taught to be more effective by jointly learning from the design model and the experimental data obtained from process tomography. The resulting data-driven gradient optimization algorithm (d-grape) can in principle correct all deterministic gate errors, with a mild efficiency loss. The d-grape algorithm may become more powerful with broadband controls that involve a large number of control parameters, while other algorithms usually slow down due to the increased size of the search space. These advantages are demonstrated by simulating the implementation of a two-qubit controlled-not gate.

关键词： Quantum control Quantum gates

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Learning a robust society of tracking parts

arXiv

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arXiv 2017年

作者： Burceanu, Elena Leordeanu, Marius Institute of Mathematics of the Romanian Academy Bucharest Romania Bitdefender Romania Department of Mathematics and Computer Science University of Bucharest Romania Department of Automatic Control and Computer Science University Politehnica of Bucharest

Object tracking is an essential task in computer vision that has been studied since the early days of the field. Being able to follow objects that undergo different transformations in the video sequence, including changes in scale, illumination, shape and occlusions, makes the problem extremely difficult. One of the real challenges is to keep track of the changes in objects appearance and not drift towards the background clutter. Different from previous approaches, we obtain robustness against background with a tracker model that is composed of many different parts. They are classifiers that respond at different scales and locations. The tracker system functions as a society of parts, each having its own role and level of credibility. Reliable classifiers decide the tracker’s next move, while newcomers are first monitored before gaining the necessary level of reliability to participate in the decision process. Some parts that loose their consistency are rejected, while others that show consistency for a sufficiently long time are promoted to permanent roles. The tracker system, as a whole, could also go through different phases, from the usual, normal functioning to states of weak agreement and even crisis. The tracker system has different governing rules in each state. What truly distinguishes our work from others is not necessarily the strength of individual tracking parts, but the way in which they work together and build a strong and robust organization. We also propose an efficient way to learn simultaneously many tracking parts, with a single closed-form formulation. We obtain a fast and robust tracker with state of the art performance on the challenging OTB50 dataset. Copyright © 2017, The Authors. All rights reserved.

关键词： Machine learning

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A lower bound on the separation between two solutions of a scalar Riemann-Liouville fractional differential equation

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AIP Conference Proceedings 2019年第1期2116卷

作者： Anh Pham The Piotr Jurgaś Michał Niezabitowski c) Tuan Hoang The 1Le Quy Don Technical University Faculty of Information Technology 236 Hoang Quoc Viet Ha noi Viet nam 2Silesian University of Technology Faculty of Automatic Control Electronics and Computer Science Institute of Automatic Control Akademicka 16 44-100 Gliwice Poland 3University of Silesia Faculty of Mathematics Physics and Chemistry Institute of Mathematics Bankowa 14 40-007 Katowice Poland 4Vietnam Academy of Science and Technology Institute of Mathematics 18 Hoang Quoc Viet Ha noi Viet nam

In this paper, we establish a lower bound on the separation between two distinct solutions of a scalar Riemann-Liouville fractional differential equation. As a consequence, we show that the Lyapunov exponent of an arbitrary non-trivial solution of a bounded linear scalar Riemann-Liouville fractional differential equation is always non-negative.

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Implementation of Non-Integer Order Filtering for the Purpose of Disparities Detection in Beta Frequencies - A Pilot Study

Implementation of Non-Integer Order Filtering for the Purpos...

引用

International Conference on Methods and Models in Automation and Robotics

作者： Aleksandra Kawala-Janik Magda Zolubak Waldemar Bauer Bartosz Nazimek Tomasz Sobolewski Radek Martinek Marcin Sowa Mariusz Pelc Faculty of Electrical Engineering Automatic Control and Informatics Opole University of Technology Opole Poland Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering AGH University of Science and Technology Krakow Poland Department of Neurosurgery University Hospital in Opole Opole Poland Faculty of Electrical Engineering Silesian University of Technology Gliwice Poland Department of Cybernetics and Biomedical Engineering VSB-Technical University of Ostrava Ostrava Czech Republic

In this work the authors of the hereof paper describe pilot study on implementation of fractional order filtering applied for the purpose of disparities detection in Beta Frequencies. The Beta waves frequency range can be split into three sections, where the information provided by particular section enables more accurate medical diagnosis. Spectral analysis used in this study allowed appropriate isolation of the Beta waves. Implementation of non-integer order filtering in such study is innovative and provided some promising results.

关键词： Electroencephalography Spectrogram Electronic mail Frequency measurement Transfer functions Electrical engineering Stress

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Detection of impulsive disturbances in archive audio signals

Detection of impulsive disturbances in archive audio signals

引用

IEEE International Conference on Acoustics, Speech and Signal Processing

作者： Marcin Ciolek Maciej Niedzwiecki Faculty of Electronics Telecommunications and Computer Science Department of Automatic Control Gdansk University of Technology Narutowicza 11/12 80-233 Poland

ISBN: (纸本)9781509041183

In this paper the problem of detection of impulsive disturbances in archive audio signals is considered. It is shown that semi-causal/noncausal solutions based on joint evaluation of signal prediction errors and leave-one-out signal interpolation errors, allow one to noticeably improve detection results compared to the prediction-only based solutions. The proposed approaches are evaluated on a set of clean audio signals contaminated with real click waveforms extracted from silent parts of old gramophone recordings.

关键词： Audio signal restoration outlier detection

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Configuring a cisco IR829GW as an internet of things device 15

Configuring a cisco IR829GW as an internet of things device

引用

15th RoEduNet International Conference, RoEduNet 2016

作者： Şerban, Razvan Culic, Ioana Faculty of Automatic Control and Computer Science 'Politehnica' University of Bucharest Bucharest Romania

ISBN: (纸本)9781509053988

As the Internet of Things evolves, many devices that were not previously considered suitable for this trend can now be used as a part of smart interconnected systems. This paper describes the process of adapting a Cisco IR829GW router to be used as both a Cisco IOS platform (for complex networking needs) and an embedded device running Yocto Linux distribution for Internet of Things application deployment and quick scripting needs using Wyliodrin. © 2016 IEEE.

关键词： Internet of things

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Machine-Learning-based High-resolution DOA Measurement and Robust DM for Hybrid Analog-Digital Massive MIMO Transceiver

arXiv

引用

arXiv 2018年

作者： Shu, Feng Xu, Ling Lin, Jinyong Hu, Jingsong Gui, Linqing Li, Jun Wang, Jiangzhou School of Electronic and Optical Engineering Nanjing University of Science and Technology 210094 China College of Computer and Information Sciences Fujian Agriculture and Forestry University Fuzhou350002 China Beijing Aerospace Automatic Control Institute Beijing100854 China School of Engineering and Digital Arts University of Kent CanterburyCT2 7NT United Kingdom

—At hybrid analog-digital (HAD) transceiver, an improved HAD rotational invariance techniques (ESPRIT), called I-HAD-ESPRIT, is proposed to measure the direction of arrival (DOA) of desired user, where the phase ambiguity due to HAD structure is addressed successfully. Subsequently, a machine-learning (ML) framework is proposed to improve the precision of measuring DOA. In the training stage, the HAD transceiver works as a receiver and repeatedly measures the values of DOA via I-HAD-ESPRIT to form a slightly large training data set (TDS) of DOA. From TDS, we find that the probability density function (PDF) of DOA measurement error (DOAME) is approximated as a Gaussian distribution by the histogram method in ML. This TDS is used to learn the mean of DOA and the variance of DOAME, which are utilized to infer their values and improve their precisions in the real-time stage. The HAD transceiver rapidly measures the real-time value of DOA some times to form a relatively small real-time set (RTS), which is used to learn the real-time mean and variance of DOA/ DOAME. Then, three weight combiners are proposed to combine the-maximum-likelihood-learning outputs of TDS and RTS. Their weight factors depend intimately on the numbers of elements in TDS and RTS, and signal-to-noise ratios during the two stages. Using the mean and variance of DOA/DOAME, their PDFs can be given directly, and we propose a robust beamformer for directional modulation (DM) transmitter with HAD by fully exploiting the PDF of DOA/DOAME, especially a robust analog beamformer on RF chain. Simulation results show that: 1) The proposed I-HAD-ESPRIT can achieve the HAD CRLB;2) The proposed ML framework performs much better than the corresponding real-time one without training stage, 3) The proposed robust DM transmitter can perform better than the corresponding nonrobust ones in terms of bit error rate and secrecy rate. Copyright © 2018, The Authors. All rights reserved.

关键词： Direction of arrival

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Improving the 3D positioning for low cost mobile robots 12th

引用

12th International Conference on Informatics in control, Automation and Robotics, ICINCO 2015

作者： Socas, Rafael Dormido, Sebastian Dormido, Raquel Fabregas, Ernesto Department of Computer Science and Automatic Control UNED University Madrid28040 Spain

ISBN: (纸本)9783319318967

A new algorithm to improve the 3D positioning for low cost mobile robots is presented. The core of the algorithm is based on a Finite State Machine (FSM) which estimates the 3D position and orientation of the robots, also a low pass filter and a threshold calculator are used in the system to filter and to estimate the noise in the sensors. The system sets dynamically the parameters of the algorithm and makes them independent of the noise. The algorithm has been tested with differential wheel drive robots, however it can be used with other different types of robots in a simple way. To improve the accuracy of the estimations, a new reference system based on the accelerometer of the robot is presented which reduces the accumulative error that the odometry produces. © Springer International Publishing Switzerland 2016.

关键词： Mobile robots

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IEC 61131-3 compliant PLC structure based on FPGA multi-core solution 9

IEC 61131-3 compliant PLC structure based on FPGA multi-core...

引用

9th International Conference on Signals and Electronic Systems, ICSES 2016

作者： Chodorowski, Piotr Chmiel, Miroslaw Silesian University of Technology Faculty of Automatic Control Electronics and Computer Science Poland

ISBN: (纸本)9781509026678

The paper discusses the design process of a full programmable logic controller implemented by means of FPGA device. The PLC is compliant with EN 61131-3 standard. It is equipped with a programmer that allows to transfer a program to the program memory of the controller, and the I/O controller which allows the exchange of information with the outside world, i.e. The signal modules. Some interesting aspects of instruction list and hardware architecture designing are presented, e.g. The PLC structure with a particular emphasis on central processing unit and memory map. The PLC is developed using one FPGA device as a combination of dedicated logic and soft-processor based parts. This gives an opportunity to develop interesting solutions. For example, using dual port RAM gives an opportunity to implement bit/word access without the necessity of masking bits. The paper presents a short description of a designed and written simple integrated development environment. © 2016 IEEE.

关键词： Program processors

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Integrated Motion Planning, control, and Estimation for Range-Based Marine Vehicle Positioning and Target Localization

引用

IFAC-PapersOnLine 2016年第23期49卷 34-40页

作者： Moreno-Salinas, D. Crasta, N. Ribeiro, M. Bayat, B. Pascoal, A.M. Aranda, J. Department of Computer Science and Automatic Control National Distance Education University Madrid Spain ISR/IST University of Lisbon Lisbon Portugal Switzerland

The paper addresses the problems of range-based marine vehicle positioning and target localization. Vehicle positioning aims to estimate the positions of one or more vehicles from a sequence of range measurements to fixed or moving acoustic beacons with known locations. In this context, the vehicles must execute sufficiently exciting maneuvers so as to maximize the range-based information available for multiple vehicle positioning. Using an estimation theoretical setting, the vehicle trajectories are computed by maximizing the determinant of a suitably defined Fisher information matrix (FIM), subject to inter-vehicle collision avoidance and vehicle maneuvering constraints. A numerical solution is proposed for the general case. Analytical solutions are obtained in the case of one vehicle and one beacon, when the latter undergoes trajectories that are straight lines, pieces of arcs, or a combination thereof. The theoretical analysis is complemented with practical experiments that focus on the dual problem of underwater target localization. The objective is to estimate the position of a moving underwater target by using range measurements between the target and a vehicle, called a tracker, undergoing a trajectory that can be measured on-line. The experimental set-up includes a surface and an autonomous underwater vehicle of the MEDUSA*-class playing the roles of tracker and target, respectively. In the methodology adopted for system implementation the tracker runs three key algorithms simultaneously, over a sliding time window: i) tracker motion planning, ii) tracker motion control, and iii) target motion estimation based on range data acquired on-line. © 2016

关键词： Maneuverability Autonomous underwater vehicles Fisher information matrix Motion estimation Motion planning Target tracking Trajectories Beacon localization Integrated motion planning Inter vehicle collision Range based Sliding time windows System implementation Trajectory optimization Vehicle trajectories

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