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IEEE Annual Conference on Decision and control

作者： Henrik Ohlsson Michel Verhaegen S. Shankar Sastry Department of Electrical Engineering and Computer Sciences University of California Berkeley CA USA Delft Center for Systems and Control Delft University Delft 2628CD The Netherlands

ISBN: (纸本)9781467357159

Many systems for which compressive sensing is used today are dynamical. The common approach is to neglect the dynamics and see the problem as a sequence of independent problems. This approach has two disadvantages. Firstly, the temporal dependency in the state could be used to improve the accuracy of the state estimates. Secondly, having an estimate for the state and its support could be used to reduce the computational load of the subsequent step. In the linear Gaussian setting, compressive sensing was recently combined with the Kalman filter to mitigate above disadvantages. In the nonlinear dynamical case, compressive sensing can not be used and, if the state dimension is high, the particle filter would perform poorly. In this paper we combine one of the most novel developments in compressive sensing, nonlinear compressive sensing, with the particle filter. We show that the marriage of the two is essential and that neither the particle filter or nonlinear compressive sensing alone gives a satisfying solution.

关键词： Particle filters Compressed sensing nonlinearity Marriage

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Postprocessing for quantum random-number generators: Entropy evaluation and randomness extraction

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Physical Review A 2013年第6期87卷 062327-062327页

作者： Xiongfeng Ma Feihu Xu He Xu Xiaoqing Tan Bing Qi Hoi-Kwong Lo Center for Quantum Information Institute for Interdisciplinary Information Sciences Tsinghua University Beijing China Center for Quantum Information and Quantum Control Department of Physics and Department of Electrical and Computer Engineering University of Toronto Toronto Ontario Canada Department of Mathematics College of Information Science and Technology Jinan University Guangzhou Guangdong China

Quantum random-number generators (QRNGs) can offer a means to generate information-theoretically provable random numbers, in principle. In practice, unfortunately, the quantum randomness is inevitably mixed with classical randomness due to classical noises. To distill this quantum randomness, one needs to quantify the randomness of the source and apply a randomness extractor. Here, we propose a generic framework for evaluating quantum randomness of real-life QRNGs by min-entropy, and apply it to two different existing quantum random-number systems in the literature. Moreover, we provide a guideline of QRNG data postprocessing for which we implement two information-theoretically provable randomness extractors: Toeplitz-hashing extractor and Trevisan's extractor.

关键词： Entropy

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A driver face monitoring system for fatigue and distraction detection

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International Journal of Vehicular Technology 2013年第1期2013卷

作者： Sigari, Mohamad-Hoseyn Fathy, Mahmood Soryani, Mohsen Control and Intelligent Processing Center of Excellence (CIPCE) School of Electrical and Computer Engineering University of Tehran Tehran 14399 Iran Computer Engineering Department Iran University of Science and Technology Tehran 16846 Iran

Driver face monitoring system is a real-time system that can detect driver fatigue and distraction using machine vision approaches. In this paper, a new approach is introduced for driver hypovigilance (fatigue and distraction) detection based on the symptoms related to face and eye regions. In this method, face template matching and horizontal projection of top-half segment of face image are used to extract hypovigilance symptoms from face and eye, respectively. Head rotation is a symptom to detect distraction that is extracted from face region. The extracted symptoms from eye region are (1) percentage of eye closure, (2) eyelid distance changes with respect to the normal eyelid distance, and (3) eye closure rate. The first and second symptoms related to eye region are used for fatigue detection;the last one is used for distraction detection. In the proposed system, a fuzzy expert system combines the symptoms to estimate level of driver hypo-vigilance. There are three main contributions in the introduced method: (1) simple and efficient head rotation detection based on face template matching, (2) adaptive symptom extraction from eye region without explicit eye detection, and (3) normalizing and personalizing the extracted symptoms using a short training phase. These three contributions lead to develop an adaptive driver eye/face monitoring. Experiments show that the proposed system is relatively efficient for estimating the driver fatigue and distraction. © 2013 Mohamad-Hoseyn Sigari et al.

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Quantum hacking of a continuous-variable quantum-key-distribution system using a wavelength attack

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Physical Review A 2013年第6期87卷 062329-062329页

作者： Jing-Zheng Huang Christian Weedbrook Zhen-Qiang Yin Shuang Wang Hong-Wei Li Wei Chen Guang-Can Guo Zheng-Fu Han Key Laboratory of Quantum Information University of Science and Technology of China Hefei 230026 China Center for Quantum Information and Quantum Control Department of Electrical and Computer Engineering and Department of Physics University of Toronto Toronto Ontario M5S 3G4 Canada

The security proofs of continuous-variable quantum key distribution are based on the assumptions that the eavesdropper can neither act on the local oscillator nor control Bob's beam splitter. These assumptions may be invalid in practice due to potential imperfections in the implementations of such protocols. In this paper, we consider the problem of transmitting the local oscillator in a public channel and propose a wavelength attack which allows the eavesdropper to control the intensity transmission of Bob's beam splitter by switching the wavelength of the input light. Specifically we target continuous-variable quantum key distribution systems that use the heterodyne detection protocol using either direct or reverse reconciliation. Our attack is proved to be feasible and renders all of the final keys shared between the legitimate parties insecure, even if they have monitored the intensity of the local oscillator. To prevent our attack on commercial systems, a simple wavelength filter should be randomly added before performing monitoring detection.

关键词： Quantum cryptography

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Active self-assembly of algorithmic shapes and patterns in polylogarithmic time 13

Active self-assembly of algorithmic shapes and patterns in p...

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2013 4th ACM Conference on Innovations in Theoretical computer Science, ITCS 2013

作者： Woods, Damien Chen, Ho-Lin Goodfriend, Scott Dabby, Nadine Winfree, Erik Yin, Peng Computer Science California Institute of Technology Pasadena CA 91125 United States Center for Mathematics of Information California Institute of Technology Pasadena CA 91125 United States Chemical Engineering California Institute of Technology Pasadena CA 91125 United States Computation and Neural Systems California Institute of Technology Pasadena CA 91125 United States Bioengineering California Institute of Technology Pasadena CA 91125 United States Center for Biological Circuit Design California Institute of Technology Pasadena CA 91125 United States Department of Electrical Engineering National Taiwan University Taiwan Wyss Institute for Biologically Inspired Engineering 3 Blackfan Circle Boston MA 02445 United States

ISBN: (纸本)9781450318594

We describe a computational model for studying the complexity of self-assembled structures with active molecular components. Our model captures notions of growth and movement ubiquitous in biological systems. The model is inspired by biology's fantastic ability to assemble biomolecules that form systems with complicated structure and dynamics, from molecular motors that walk on rigid tracks and proteins that dynamically alter the structure of the cell during mitosis, to embryonic development where large scale complicated organisms efficiently grow from a single cell. Using this active self-assembly model, we show how to efficiently self-assemble shapes and patterns from simple monomers. For example we show how to grow a line of monomers in time and number of monomer states that is merely logarithmic in its length. Our main results show how to grow arbitrary connected two-dimensional geometric shapes and patterns in expected time polylogarithmic in the size of the shape plus roughly the time required to run a Turing machine deciding whether or not a given pixel is in the shape. We do this while keeping the number of monomer types logarithmic in shape size, plus monomers required by the Kolmogorov complexity of the shape or pattern. This work thus highlights the fundamental efficiency advantage of active self-assembly over passive self-assembly and motivates experimental effort to construct self-assembly systems with active molecular components. © 2013 Authors.

关键词： Self assembly

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control-oriented Averaging of Tail-actuated Robotic Fish Dynamics

Control-oriented Averaging of Tail-actuated Robotic Fish Dyn...

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American control Conference

作者： Jianxun Wang Songlin Chen Xiaobo Tan Smart Microsystems Laboratory Department of Electrical and Computer Engineering Michigan State University East Lansing MI 48824 USA Control and Simulation Center Harbin Institue of Technology Harbin 150001 China

ISBN: (纸本)9781479901777

Motivated by the need for efficient control design, in this paper we consider the averaging of dynamics for a tail-actuated robotic fish, based on an experimentally validated dynamic model that incorporates rigid body dynamics and Lighthill's large-amplitude elongated-body theory. We first show that classical averaging theory fails in this case because of the relatively large oscillatory input in the driving terms. On the other hand, while the first-order geometric averaging method for systems with highly oscillatory inputs is able to capture the original time-dependent dynamics, the resulting average model is overly complex for controller design. We propose a novel control-oriented, data-driven averaging approach for robotic fish dynamics, where a scaling function is introduced on top of the classical averaging method. We run extensive simulations for different combinations of tail-beat bias, amplitude, and frequency, and find that the scaling function is constant for the force equations and varies linearly with the tail-beat bias for the moment equation. The validity of the resulting average model has been confirmed in simulation results for open-loop dynamics with new sets of tail-beat parameters, and for closed-loop dynamics when proportional control of the tail-beat bias is used in target tracking.

关键词： averaging scaling function dynamics moment equation Proportional control Target tracking design control Statistical Biases bias(electronics)

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Optimized real-time soft analyzer for chemical process using artificial intelligence

Optimized real-time soft analyzer for chemical process using...

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Asian control Conference

作者： Mohammad Mahdi Karimi Alireza Fatehi Reza Ebrahimpour Ali Shamsaddinlou APAC research group Department of ControlEngineering Shahid Rajaee Teacher Training University Tehran Iran APAC research group Industrial Control Center of Excellence Faculty of Electrical Engineering K.N. Toosi University of Technology Tehran Iran Department of Electrical and Computer Engineering Shahid Rajaee Teacher Training University Tehran Iran

ISBN: (纸本)9781467357661

This paper concerns application of data-derived approaches for analyzing and monitoring chemical process instruments, extracting product information, and designing estimation models for primary process variables, or difficult to measure in real-time variables. Modeling of process with an optimized classical neural network, the multi-layer perceptron (MLP) is discussed. Tennessee Eastman Process, a well-known plant wide process benchmark, is applied to validate the proposed approach. Investigations and several algorithms as step response test, Lipschitz number method and forward selection are used. The main advancement introduced here is that a hierarchical level responsible strategy is applied for selection of input variables and respective efficient time delays to attain the highest possible prediction accuracy of the neural network model for industrial process identification.

关键词： Delay effects Process control Algorithm design and analysis Delays Biological system modeling Training Estimation

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Tuning and experimental evaluation of a likelihood-based engine knock controller

Tuning and experimental evaluation of a likelihood-based eng...

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IEEE Annual Conference on Decision and control

作者： Andreas Thomasson Lars Eriksson Tobias Lindell James C. Peyton Jones Jill Spelina Jesse Frey Division of Vehicular Systems at the Department of Electrical Engineering Linkoping University Linkoping SE-581 83 Sweden Center for Nonlinear Dynamics and Control and the Department of Electrical and Computer Engineering Villanova University Villanova PA 19085 USA Science Technology Engineering and Mathematics Division Delaware County Community College Media PA 19063 USA Department of Mathematics and Statistics Villanova University Villanova PA 19085 USA

ISBN: (纸本)9781467357159

A new likelihood-based stochastic knock controller, that achieves a significantly improved regulatory response relative to conventional strategies, while also maintaining a rapid transient response is presented. Up until now it has only been evaluated using simulations and the main contribution here is the implementation and validation of the knock controller on a five cylinder engine with variable compression ratio. Furthermore, an extension of the fast response strategy and a re-tuning of the controller is shown to improve performance. The controller is validated with respect to its robustness to changes in engine operating condition as well as compression ratio. The likelihood-based controller is demonstrated in engine tests and compared to a conventional controller and it is shown that it is able to operate closer to the knock limit with less variations in control action without increasing the risk of engine damage.

关键词： controllers tuning Engine knock compression ratio engine tests control action Engines

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Cooperative flocking and learning in multi-robot systems for predator avoidance

Cooperative flocking and learning in multi-robot systems for...

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IEEE International Conference on Cyber Technology in Automation, control, and Intelligent Systems

作者： Hung Manh La Ronny Salim Lim Weihua Sheng Jiming Chen Center for Advanced Infrastructure and Transportation Rutgers University Piscataway NJ USA School of Electrical and Computer Engineering Oklahoma State University Stillwater OK USA Department of Control Zhejiang University Hangzhou P. R. China

In this paper we propose a hybrid system that integrates reinforcement learning and flocking control in order to create an adaptive and intelligent multi-robot system. First, we present a flocking control algorithm that allows multiple mobile robots to move together while avoiding obstacles. Second, we propose a distributed cooperative learning algorithm that can quickly enable the mobile robot network to avoid predator/enemy while maintaining the network connectivity and topology. The convergence of the cooperative learning algorithm is discussed. As a result, the hybrid system of flocking control and cooperative reinforcement learning results in an efficient integration of high level behaviors (discrete states and actions) and low level behaviors (continuous states and actions) for multi-robot cooperation. The simulations are performed to demonstrate the effectiveness of the proposed system.

关键词： Robots

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Interfaces of nested Web application framework as reusable software component

Interfaces of nested Web application framework as reusable s...

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35th International Convention on Information and Communication Technology, Electronics and Microelectronics, MIPRO 2012

作者： Prstačić, S. Žagar, M. Kroflin, K. Faculty of Electrical Engineering and Computing Information Support Center Zagreb Croatia Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering Zagreb Croatia

ISBN: (纸本)9789532330724

The framework is designed to provide a simple and powerful way of Web application component development. Components of the framework can nest, and the framework is designed to be easy to reuse as a component, thus providing its components to be used by the host application. We explain the interfaces required to make this possible - what they provide, what issues they solve, and how their requirement was discovered. We also identify shortcomings of this approach, and issues that will be addressed by future work. © 2012 MIPRO.

关键词： computer software reusability

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