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AIAA Guidance, Navigation, and control Conference, 2018

作者： Hanlon, Nicholas Garcia, Eloy Casbeer, David W. Pachter, Meir Air Force Research Laboratory Wright-Patterson AFB OH45433 United States Air Force Research Laboratory Control Science Center of Excellence Wright-Patterson AFB OH45433 United States Air Force Institute of Technology Department of Electrical Engineering Wright-Patterson AFB OH45433 United States

ISBN: (数字)9781624105265

ISBN: (纸本)9781624105265

Pursuit-evasion problems involving multiple agents represent important and challenging applications in control, aerospace, and robotics. The authors demonstrated an active target defense scenario which is modeled as a three-agent zero-sum pursuit-evasion differential game. A two-agents team is formed which consists of a Target (T) and a Defender (D) who cooperate;the Attacker (A) is the opposition. The goal of the Attacker is to come as close as possible to the Target, possibly capturing the Target, while the Target cooperates with the Defender which tries to intercept the Attacker before the latter captures the Target, and as far away from the Target as possible. The authors transferred the algorithm development to AFSIM, a U.S. government-approved software simulation framework, and demonstrated the robustness of the approach to various turning constraints and unknown Attacker guidance. Furthermore, integration into AFSIM allows us to further refine the algorithm and evaluate its performance in more realistic environments. © 2018 by the American Institute of Aeronautics and Astronautics, Inc.

关键词： Game theory

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Secure quantum key distribution with realistic devices

arXiv

引用

arXiv 2019年

作者： Xu, Feihu Ma, Xiongfeng Zhang, Qiang Lo, Hoi-Kwong Pan, Jian-Wei Hefei National Laboratory for Physical Sciences at Microscale Department of Modern Physics University of Science and Technology of China Hefei230026 China Shanghai Branch CAS Center for Excellence Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of China Shanghai201315 China Center for Quantum Information Institute for Interdisciplinary Information Sciences Tsinghua University Beijing100084 China Center for Quantum Information and Quantum Control Department of Physics Department of Electrical & Computer Engineering University of Toronto TorontoM5S 3G4 Canada

In principle, quantum key distribution (QKD) offers information-theoretic security based on the laws of physics. In practice, however, the imperfections of realistic devices might introduce deviations from the idealized models used in security analyses. Can quantum code-breakers successfully hack real systems by exploiting the side channels? Can quantum code-makers design innovative counter-measures to foil quantum code-breakers? This article reviews theoretical and experimental progress in the practical security aspects of quantum code-making and quantum code-breaking. After numerous attempts, researchers now thoroughly understand and are able to manage the practical imperfections. Recent advances, such as the measurement-device-independent protocol, have closed the critical side channels in the physical implementations, paving the way for secure QKD with realistic devices. Copyright © 2019, The Authors. All rights reserved.

关键词： Quantum cryptography

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Formulation and Numerical Solution for Fractional Order Time Optimal control Problem Using Pontryagin's Minimum Principle

引用

IFAC-PapersOnLine 2017年第1期50卷 9224-9229页

作者： Tabatabaei S.S. Yazdanpanah M.J. Tavazoei M.S. Electrical Engineering Department Amirkabair University of Technology (Tehran Polytechnic) Tehran Iran Control & Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran Iran Electrical Engineering Department Sharif University of Technology Tehran Iran

The main purpose of this paper is to use variational calculus and Pontryagin's minimum principle to propose a solution scheme for time optimal control problem stated on the fractional systems defined in the sense of Caputo. After deriving the necessary optimality conditions, a novel numerical solution is used to solve the problem. Afterwards, a simple case study shows the effectiveness of the proposed method. © 2017

关键词： Non-integer Order Calculus Pontryagin's Minimum Principle Time Optimal control Variational Calculus

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Optimal Dynamic Lyapunov Function and The Largest Estimation of Domain of Attraction

引用

IFAC-PapersOnLine 2017年第1期50卷 2645-2650页

作者： Monfared M.N. Yazdanpanah M.J. Department of Electrical Engineering Faculty of Electrical Biomedical and Mechatronic Qazvin Branch Islamic Azad University Qazvin Iran Control & Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran Iran

Estimation of the domain of attraction is one of the major difficulties in the analysis of any nonlinear control system. Exact expression of a candidate Lyapunov function is indispensable for the estimation. The optimal Lyapunov function which helps to estimate the domain of attraction exactly is acquired by solving a partial differential equation that is not solvable easily for all of the systems. In this paper, an algebraic equation is proposed instead of the partial differential equation to acquire optimal Lyapunov function. The key tool for this purpose is dynamic Lyapunov function which makes it possible to have an analytic expression of a family of candidate Lyapunov functions that are parametric and functional. The parameters and functions would be selected such that the optimal Lyapunov function is achieved. As the second contribution of this paper, the problem of optimality in the sense of the largest elliptical estimation of region of attraction would be followed up. Using a linear matrix inequality technique and a special criterion it is shown that dynamic Lyapunov function can leads to a larger elliptical estimation than that of the conventional Lyapunov function. © 2017

关键词： Domain of Attraction Lyapunov function Nonlinear System

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Experimental Demonstration of High-Rate Measurement-Device-Independent Quantum Key Distribution over Asymmetric Channels

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Physical Review Letters 2019年第16期122卷 160501-160501页

作者： Hui Liu Wenyuan Wang Kejin Wei Xiao-Tian Fang Li Li Nai-Le Liu Hao Liang Si-Jie Zhang Weijun Zhang Hao Li Lixing You Zhen Wang Hoi-Kwong Lo Teng-Yun Chen Feihu Xu Jian-Wei Pan Shanghai Branch Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics University of Science and Technology of China Shanghai 201315 China CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of China Shanghai 201315 People’s Republic of China Centre for Quantum Information and Quantum Control (CQIQC) Department of Electrical & Computer Engineering and Department of Physics University of Toronto Toronto Ontario M5S 3G4 Canada State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China

Measurement-device-independent quantum key distribution (MDI-QKD) can eliminate all detector side channels and it is practical with current technology. Previous implementations of MDI-QKD all used two symmetric channels with similar losses. However, the secret key rate is severely limited when different channels have different losses. Here we report the results of the first high-rate MDI-QKD experiment over asymmetric channels. By using the recent 7-intensity optimization approach, we demonstrate>10×higher key rate than the previous best-known protocols for MDI-QKD in the situation of large channel asymmetry, and extend the secure transmission distance by more than 20–50 km in standard telecom fiber. The results have moved MDI-QKD towards widespread applications in practical network settings, where the channel losses are asymmetric and user nodes could be dynamically added or deleted.

关键词： Quantum cryptography Quantum networks

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Common Limitations of Image Processing Metrics: A Picture Story

arXiv

引用

arXiv 2021年

作者： Reinke, Annika Tizabi, Minu D. Sudre, Carole H. Eisenmann, Matthias Rädsch, Tim Baumgartner, Michael Acion, Laura Antonelli, Michela Arbel, Tal Bakas, Spyridon Bankhead, Peter Benis, Arriel Blaschko, Matthew Buettner, Florian Cardoso, M. Jorge Chen, Jianxu Cheplygina, Veronika Christodoulou, Evangelia Cimini, Beth A. Collins, Gary S. Engelhardt, Sandy Farahani, Keyvan Ferrer, Luciana Galdran, Adrian van Ginneken, Bram Glocker, Ben Godau, Patrick Haase, Robert Hamprecht, Fred Hashimoto, Daniel A. Heckmann-Nötzel, Doreen Hirsch, Peter Hoffman, Michael M. Huisman, Merel Isensee, Fabian Jannin, Pierre Kahn, Charles E. Kainmueller, Dagmar Kainz, Bernhard Karargyris, Alexandros Karthikesalingam, Alan Kavur, A. Emre Kenngott, Hannes Kleesiek, Jens Kleppe, Andreas Koehler, Sven Kofler, Florian Kopp-Schneider, Annette Kooi, Thijs Kozubek, Michal Kreshuk, Anna Kurc, Tahsin Landman, Bennett A. Litjens, Geert Madani, Amin Maier-Hein, Klaus Martel, Anne L. Mattson, Peter Meijering, Erik Menze, Bjoern Moher, David Moons, Karel G.M. Müller, Henning Nichyporuk, Brennan Nickel, Felix Noyan, M. Alican Petersen, Jens Polat, Gorkem Rafelski, Susanne M. Rajpoot, Nasir Reyes, Mauricio Rieke, Nicola Riegler, Michael A. Rivaz, Hassan Saez-Rodriguez, Julio Sánchez, Clara I. Schroeter, Julien Saha, Anindo Selver, M. Alper Sharan, Lalith Shetty, Shravya Smeden, Maarten V.A.N. Stieltjes, Bram Summers, Ronald M. Taha, Abdel A. Tiulpin, Aleksei Tsaftaris, Sotirios A. Calster, Ben V.A.N. Varoquaux, Gaël Wiesenfarth, Manuel Yaniv, Ziv R. Jäger, Paul Maier-Hein, Lena Division of Intelligent Medical Systems and HI Helmholtz Imaging Heidelberg Germany Faculty of Mathematics and Computer Science Heidelberg University Heidelberg Germany Division of Intelligent Medical Systems Heidelberg Germany NCT Heidelberg DKFZ University Medical Center Heidelberg Germany MRC Unit for Lifelong Health and Ageing UCL Centre for Medical Image Computing Department of Computer Science University College London London United Kingdom School of Biomedical Engineering and Imaging Science King’s College London London United Kingdom Division of Medical Image Computing Heidelberg Germany Instituto de Cálculo CONICET – Universidad de Buenos Aires Buenos Aires Argentina Centre for Medical Image Computing University College London London United Kingdom McGill University Montréal Canada Division of Computational Pathology Dept of Pathology & Laboratory Medicine Indiana University School of Medicine IU Health Information and Translational Sciences Building Indianapolis United States University of Pennsylvania Richards Medical Research Laboratories FL7 PhiladelphiaPA United States Institute of Genetics and Cancer University of Edinburgh Edinburgh United Kingdom Department of Digital Medical Technologies Holon Institute of Technology Holon Israel European Federation for Medical Informatics Le Mont-sur-Lausanne Switzerland Center for Processing Speech and Images Department of Electrical Engineering KU Leuven Kasteelpark Arenberg 10 - box 2441 Leuven3001 Belgium Frankfurt/Mainz DKFZ UCT Frankfurt-Marburg Germany Heidelberg Germany Goethe University Frankfurt Department of Medicine Germany Goethe University Frankfurt Department of Informatics Germany Frankfurt Cancer Insititute Germany Leibniz-Institut für Analytische Wissenschaften – ISAS – e.V. Dortmund Germany Department of Computer Science IT University of Copenhagen Copenhagen Denmark Imaging Platform Broad Institute of MIT and Harvard CambridgeMA United States Centre for St

While the importance of automatic image analysis is continuously increasing, recent meta-research revealed major flaws with respect to algorithm validation. Performance metrics are particularly key for meaningful, objective, and transparent performance assessment and validation of the used automatic algorithms, but relatively little attention has been given to the practical pitfalls when using specific metrics for a given image analysis task. These are typically related to (1) the disregard of inherent metric properties, such as the behaviour in the presence of class imbalance or small target structures, (2) the disregard of inherent data set properties, such as the non-independence of the test cases, and (3) the disregard of the actual biomedical domain interest that the metrics should reflect. This living dynamically document has the purpose to illustrate important limitations of performance metrics commonly applied in the field of image analysis. In this context, it focuses on biomedical image analysis problems that can be phrased as image-level classification, semantic segmentation, instance segmentation, or object detection task. The current version is based on a Delphi process on metrics conducted by an international consortium of image analysis experts from more than 60 institutions worldwide. © 2021, CC BY.

关键词： Medical imaging

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An optimal-stochastic aircraft defense strategy for the active target defense scenario

An optimal-stochastic aircraft defense strategy for the acti...

引用

AIAA Guidance, Navigation, and control Conference, 2018

作者： Weintraub, Isaac E. Garcia, Eloy Pachter, Meir Aerospace Vehicles Technology Assessment and Simulation Branch Air Force Research Laboratory Wright-Patterson AFB OH45433 United States Control Science Center of Excellence Air Force Research Laboratory Wright-Patterson AFB OH45433 United States Department of Electrical Engineering Air Force Institute of Technology Wright-Patterson AFB OH45433 United States

ISBN: (数字)9781624105265

ISBN: (纸本)9781624105265

In this paper a three agent engagement scenario wherein a target vehicle tries to escape an attacking missile by maneuvering to aid an autonomous defending missile’s trajectory to ensure survival. Different from previous work, we remove the assumption that the target vehicle has perfect knowledge of the states of the defending and attacking missiles by estimating their vehicle states through range and heading measurements. Using an Extended Kalman Filter (EKF) the vehicle states are estimated through the non-linear measurement equations;as a result, this scenario is solved using stochastic-estimation in conjunction with optimal control theory. In order to accomplish the numerical computation of the optimal control, where an objective function containing estimated states is minimized, we use a shooting method involving Monte-Carlo state averages. We begin the analysis by deriving the governing analytical dynamics and measurement equations. Next we compute the analytical Jacobians required for the implementation of an Extended Kalman Filter (EKF). Using the EKF to estimate the state space we feed the state averages from Monte-Carlo to an objective function whose minimization produces an optimal control. By formulating the objective function to maximize distance from the attacking missile and target vehicle and to minimize the range from the defending missile to the attacking missile, the optimal input of target vehicle heading rate is computed for target vehicle to escape its attacker and aid the closure of the defending and attacking missiles. A scenario involving the three agents is simulated in two-dimensional space using the derived equations of motion, and the results from the computed optimal control are presented with discussion. © 2018 by the American Institute of Aeronautics and Astronautics, Inc.

关键词： Stochastic systems

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Aircraft Defense Differential Game with Non-Zero Capture Radius

引用

IFAC-PapersOnLine 2017年第1期50卷 14200-14205页

作者： Garcia, Eloy Casbeer, David W. Fuchs, Zachariah E. Pachter, Meir Control Science Center of Excellence Air Force Research Laboratory Wright-Patterson AFB OH45433 United States Department of Electrical Engineering Wright State University DaytonOH45435 United States Department of Electrical Engineering Air Force Institute of Technology Wright-Patterson AFB OH45433 United States

An aircraft defense differential game is analyzed where a Target aircraft and a Defender missile team up to defeat an Attacker missile. The Attacker pursues the (slower) Target which evades the Attacker with the help of the Defender, which is endowed with a non-zero capture radius. The Target and the Defender cooperate in a way that the Defender intercepts the Attacker before the latter reaches the Target. The payoff functional is the distance between the Target and the Attacker at the interception time which the Attacker strives to minimize and the Target/Defender team strives to maximize. The work in this paper generalizes existing results to consider a non-zero capture radius as opposed to the limiting case of point capture. © 2017

关键词： Network security Game theory Missiles Differential games Interception time Limiting case

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A robust adaptive sliding mode controller for robot manipulators 7

A robust adaptive sliding mode controller for robot manipula...

引用

7th Conference on Artificial Intelligence and robotics, IRANOPEN 2017

作者： Gorji, Shaghayegh Yazdanpanah, Mohammad Javad Department of Electrical Biomedical and Mechatronics Qazvin Branch Islamic Azad University Qazvin Iran Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering University of Tehran Tehran Iran

ISBN: (纸本)9781538628621

In this paper, a novel adaptive sliding mode control for rigid robot manipulators is proposed. In the considered system, since there may exist explicit unknown system parameters and also perturbations, a lyapunov based approach is presented to increase system robustness, even in presence of arbitrarily large (but not infinite) discontinuous perturbations. The design contains two different phases of adaptation. The first one is related to the robot parameters and the other is accounted for perturbation estimating. A continuous controller is presented from the first step of design procedure. We try to prove the stability in the sense of lyapunov and derive adaptive laws and uniform ultimate boundedness in the worst condition. Simulation results for two degrees of freedom rigid robot manipulator effectively demonstrate the capability of mentioned approach. © 2017 IEEE.

关键词： Sliding mode control

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Optimal target intercept paths for vehicles with turn radius constraints

arXiv

引用

arXiv 2018年

作者： Manyam, Satyanarayana Gupta Casbeer, David von Moll, Alexander Fuchs, Zachariah Infoscitex Corp. 4027 Col Glenn Hwy DaytonOH45431 United States Control Center of Excellence Air Force Research Laboratories WPAFBOH45431 United States Control Center of Excellence Air Force Research Laboratories WPAFBOH45431 United States Department of Electrical Engineering University of Cincinnati CincinnatiOH United States

We present a path planning problem for a pursuer to intercept a target traveling on a circle. The pursuer considered here has limited yaw rate, and therefore its path should satisfy the kinematic constraints. We assume that the distance between initial position of the pursuer and any point on the target circle is greater than four times the minimum turn radius of the pursuer. We prove the continuity of the Dubins paths of type Circle-Straight line-Circle with respect to the position on the target circle. This is used to prove that the optimal interception path is a Dubins path, and we present an iterative algorithm to find the optimal interception point on the target circle. Copyright © 2018, The Authors. All rights reserved.

关键词： Iterative methods

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