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Quantum Electronics and Laser Science Conference (QELS)

作者： Lei-Lei Huang Bing Qi Li Qian Hoi-Kwong Lo Department of Electrical and Computer Engineering and Department of Physics Center for Quantum Information and Quantum Control Toronto ONT Canada

We report the first experimental demonstration of one-way Gaussian-modulated coherent state quantum key distribution system over kilometers of standard telecom fiber. Under realistic assumptions, the achievable secret... 详细信息

ISBN: (纸本)9781424436484

关键词： Telecommunication standards Quantum computing Detectors Pulse modulation Protocols Phase measurement Phase detection control systems Gaussian processes Security

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Modulation identification using combined classifiers and co-evolution of classifiers and tests

Modulation identification using combined classifiers and co-...

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International Conference on Information Fusion

作者： M. Mirmomeni B. Moshiri C. Lucas Control and Intelligent Processing Center of Excellence Electrical and Computer Engineering Department University of Tehran Tehran Iran

ISBN: (纸本)9780662478300;0662478304

Nowadays, there are considerable attentions to combined classifier. Recently, the focus has been shifting from practical heuristic solutions of combination methods to give a methodological way of design. In this study a co-evolutionary algorithm is presented for this purpose. The algorithm synthesizes an explicit classifier directly from bserved data produced by intelligently generated tests. The algorithm is composed of two co-evolving populations; one population evolves candidate classifiers. The second population evolves informative tests that either extract new information from the pattern or elicit desirable behavior from it The fitness of candidate classifiers is their ability to classify in response to all tests carried out so far; the fitness of candidate tests is their ability to make the classifiers disagree in their classifications. The generality of this modeling-evaluation algorithm is demonstrated by applying the chosen classifier of this algorithm to identify modulation methods and results depict the power of this algorithm.

关键词： Testing Process control Intelligent control Pattern recognition Inference algorithms Evolutionary computation Focusing Design methodology Data mining Power generation

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Robust Receding Horizon control of A Tri-Turbofan Airship

Robust Receding Horizon Control of A Tri-Turbofan Airship

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International Conference on control and Automation (ICCA)

作者： Roseann Trevino Michael Frye Justin A. Franz Chunjiang Qian Control Computation and Cybernetics (C3) Laboratory Department Electrical and Computer Engineering University of Texas San Antonio San Antonio TX USA

This paper examines the use of receding horizon control technique to stabilize a 6 degree-of-freedom model of a tri-turbofan remote controlled indoor airship. The lateral-directional dynamics of the airship are simulated using a linear parameter varying force model that has been verified against actual flight test data. Due to the varying dynamics of the airship as it transitions between different flight modes, the problem of developing robust controllers due to model uncertainty becomes challenging. A receding horizon control implementation formulated as a linear matrix inequality optimization problem is implemented in order to introduce robustness to the changing dynamics of the airship model.

关键词： Robust control Mathematical model Analytical models Vehicle dynamics Automatic control Testing Uncertainty Linear matrix inequalities Cybernetics Laboratories

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Observer-based control of differential linear repetitive processes 9

Observer-based control of differential linear repetitive pro...

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2007 9th European control Conference, ECC 2007

作者： Paszke, Wojciech Galkowski, Krzysztof Rogers, Eric Kummert, Anton Institute of Control and Computation Engineering University of Zielona Góra ul. Podgórna 50 Góra65-246 Poland Department of Electronics and Computer Science University of Southampton SouthamptonSO17 1BJ United Kingdom Faculty of Electrical Information and Media Engineering University of Wuppertal Rainer-Gruenter-Strasse 21 D-42119 Germany

ISBN: (纸本)9783952417386

Repetitive processes are a distinct class of two-dimensional systems (i.e. information propagation in two independent directions) of both systems theoretic and applications interest. They cannot be controlled by direct extension of existing techniques from either standard (termed 1D here) or two-dimensional (2D) systems theory. Here we give significant new results on the design of mixed state feedback/output (or pass profile) control schemes incorporating a state observer. These results are for the sub-class of so-called differential linear repetitive processes which arise in applications areas such as iterative learning control. © 2007 EUCA.

关键词： State feedback

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User Modeling for the Result Re-Ranking in the Meta-Search Engines via Reinforcement Learning

User Modeling for the Result Re-Ranking in the Meta-Search E...

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International Conference on Intelligent Systems Design and Applications (ISDA)

作者： Amir Hosein Keyhanipour Behzad Moshiri Caro Lucas Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering Department University of Tehran Tehran Iran

Today there are thousands of search engines available, so it is difficult for users to know where they are, how to use them and what topics they best address. Meta-search engines reduce the users' burden by dispatching queries to multiple search engines in parallel and combining the returned results. But there are some problems yet. One of them is that, none of them includes the user model in the answer. In this paper, we propose a mechanism to create a mapping between different categories of users and the underlying search engines using the reinforcement learning approach. By this way, the meta-search engine learns to identify which search engines are most appropriate for particular queries from different user models.

关键词： Metasearch Learning Databases Search engines Information retrieval Intelligent systems Application software Process control Intelligent control Design engineering

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Frequency Response Analysis of Active Disturbance Rejection Based control System

Frequency Response Analysis of Active Disturbance Rejection ...

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IEEE Conference on control Technology and Applications (CCTA)

作者： Gang Tian Zhiqiang Gao Center for Advanced Control Technologies Department of Electrical and Computer Engineering Cleveland State University Cleveland OH USA

Active Disturbance Rejection is a relatively new, and quite different, design concept that shows much promise in obtaining consistent response in an industrial control system full of uncertainties. But most of the development and analysis has previously been shown in the time-domain. In this paper, frequency-domain analysis of such a control system is performed to quantify its performance and stability characteristics. The transfer function description of the controller is derived and, together with a highly uncertain linear time-invariant plant, the loop gain frequency response is analyzed. The result shows that the active disturbance rejection based control system possesses a high level of robustness. The bandwidth and stability margins, in particular, are nearly unchanged as the plant parameters vary significantly; so is the sensitivity to input disturbance. Such characteristics makes this control system an appealing solution in dealing with real world control problems where uncertainties abound.

关键词： Frequency response control systems Uncertainty Industrial control Time domain analysis Frequency domain analysis Stability analysis Transfer functions Robust control Bandwidth

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Decoy state protocols for quantum cryptography with parametric down conversion sources

Decoy state protocols for quantum cryptography with parametr...

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International Quantum Electronics Conference, IQEC 2007

作者： Ma, Xiongfeng Fung, Chi-Hang Fred Lo, Hoi-Kwong Center for Quantum Information and Quantum Control Department of Electrical and Computer Engineering University of Toronto Toronto ON M5S 1A7 Canada Department of Physics University of Toronto Toronto ON M5S 1A7 Canada

No abstract available

ISBN: (纸本)1424409306

No abstract available

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Filtering of discrete linear repetitive processes with ∞ and 2-∞ performance

Filtering of discrete linear repetitive processes with ∞ an...

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2007 IEEE International Symposium on Circuits and Systems, ISCAS 2007

作者： Ligang, Wu Lam, James Paszke, Wojciech Galkowski, Krzysztof Rogers, Eric Kummert, Anton Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin 150001 China Department of Mechanical Engineering University of Hong Kong Pokfulam Road Hong Kong Hong Kong Institute of Control and Computation Engineering University of Zielona Góra 65-246 Zielona Góra Poland School of Electronics and Computer Science University of Southampton Southampton SO17 IBJ United Kingdom University of Wuppertal Faculty of Electrical Information and Media Engineering Communication Theory

This paper considers the general filtering problem for a distinct class of two-dimensional (2-D) discrete linear systems, i.e. information propagation in two independent directions, known as discrete linear repetitive processes which are of both system-theoretic and applications interest. In particular, new results on the design of filters with guaranteed levels of performance are developed. These take the form of algorithms for the design of an ∞ and 2-∞ dynamic output feedback filter which guarantees that the resulting filtering error process is stable and has prescribed disturbance attenuation performance as measured by ∞ and 2- ∞ norms. © 2007 IEEE.

关键词： Signal filtering and prediction

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Decoy state protocols for quantum cryptography with parametric down conversion sources

Decoy state protocols for quantum cryptography with parametr...

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Conference on Lasers and Electro-Optics Europe (CLEO EUROPE)

作者： Xiongfeng Ma Chi-Hang Fred Fung Hoi-Kwong Lo Center for Quantum Information and Quantum Control Department of Electrical & Computer Engineering and Department of Physics University of Toronto Toronto ONT Canada

In this paper, we show that decoy states are very simple to implement for quantum key distribution (QKD) with parametric down conversion (PDC) sources. Indeed, with no modification in the hardware at all, by using the AYKI scheme, one can achieve a key generation rate that is close to the theoretical limit of infinite decoy states. Therefore, we expect decoy state QKD to become a standard technique not only in the coherent state QKD, but also in QKD with PDC sources.

关键词： Cryptographic protocols Cryptography Quantum computing Security Hardware Proposals Optical control Distributed computing Optical computing Physics computing

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Quantum key distribution with entangled photon sources

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Physical Review A 2007年第1期76卷 012307-012307页

作者： Xiongfeng Ma Chi-Hang Fred Fung Hoi-Kwong Lo Center for Quantum Information and Quantum Control Department of Electrical and Computer Engineering University of Toronto Toronto Ont. M5S 1A7 Canada

A parametric down-conversion (PDC) source can be used as either a triggered single-photon source or an entangled-photon source in quantum key distribution (QKD). The triggering PDC QKD has already been studied in the literature. On the other hand, a model and a post-processing protocol for the entanglement PDC QKD are still missing. We fill in this important gap by proposing such a model and a post-processing protocol for the entanglement PDC QKD. Although the PDC model is proposed to study the entanglement-based QKD, we emphasize that our generic model may also be useful for other non-QKD experiments involving a PDC source. Since an entangled PDC source is a basis-independent source, we apply Koashi and Preskill’s security analysis to the entanglement PDC QKD. We also investigate the entanglement PDC QKD with two-way classical communications. We find that the recurrence scheme increases the key rate and the Gottesman-Lo protocol helps tolerate higher channel losses. By simulating a recent 144−km open-air PDC experiment, we compare three implementations: entanglement PDC QKD, triggering PDC QKD, and coherent-state QKD. The simulation result suggests that the entanglement PDC QKD can tolerate higher channel losses than the coherent-state QKD. The coherent-state QKD with decoy states is able to achieve highest key rate in the low- and medium-loss regions. By applying the Gottesman-Lo two-way post-processing protocol, the entanglement PDC QKD can tolerate up to 70dB combined channel losses (35dB for each channel) provided that the PDC source is placed in between Alice and Bob. After considering statistical fluctuations, the PDC setup can tolerate up to 53dB channel losses.

关键词： Quantum theory

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