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International Conference on Information Fusion

作者： Kaveh Kavousi Behzad Moshiri Control and Intelligent Processing Center of Excellence (CIPCE) School of Electrical and Computer Engineering University of Tehran Tehran Iran

ISBN: (纸本)9780662478300;0662478304

Nowadays, the need for intelligent software systems as personal meta search engines which are capable of supplying user by needed information from massive information resources is sensible. Moreover, the current tools have many deficiencies. In a meta search engine, proper queries based upon user's interests are sent to different search engines (or in general, information servers). Then, the returned results are refined and made available for the user based on their priorities. On the same direction in this study we try to design, implement and examine a complete architecture for a customized software intelligent agent which is able to retrieve information from multiple sources based on user interests. The designed architecture is able to use information fusion methods to achieve this goal. Here, the OWA, which is a member of the fuzzy integral operators family, has been used. This agent performs fusion in data, feature, and decision levels. Also the agent is able to extract the behavioral model of each information server against various subjective clusters to increase the intelligence of searching methods and obtain higher quality results in searching process.

关键词： Intelligent agent Information retrieval computer architecture Search engines Metasearch Intelligent systems Software systems Information resources Open wireless architecture Data mining

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One-way continuous-variable quantum key distribution over 5km of standard telecom fiber

One-way continuous-variable quantum key distribution over 5k...

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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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Experimental quantum key distribution with active phase randomization

Experimental quantum key distribution with active phase rand...

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Quantum Electronics and Laser Science Conference (QELS)

作者： Yi Zhao Bing Qi Hoi-Kwong Lo Department of Physics and Department of Electrical and Computer Engineering Center for Quantum Information and Quantum Control Toronto ONT Canada

Phase-randomization is an important assumption in many security proofs of practical quantum key distribution (QKD) systems. Here, we present the first experimental QKD with reliable active phase-randomization. A polar... 详细信息

ISBN: (纸本)9781424436484

关键词： Pulse modulation Phase modulation Optical fiber polarization Quantum computing Optical pulse generation Security Mirrors Optical modulation Optical fiber cables Random number generation

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TRACKING control IN THE PRESENCE OF NONLINEAR DYNAMIC FRICTIONAL EFFECTS: ROBOT EXTENSION

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Asian Journal of control 2008年第3期1卷

作者： M. Feemster D.M. Dawson A. Behal W. Dixon Matthew Feemster received the B.S degree in Electrical Engineering from Clemson University Clemson South Carolina in December 1994. Upon graduation he remained at Clemson University and received the M.S. degree in Electrical Engineering in 1997. During this time he also served as a research/teaching assistant. His research work focused on the design and implementation of various nonlinear control algorithms with emphasis on the induction motor and mechanical systems with friction present. He is currently working toward his Ph.D. degree in Electrical Engineering at Clemson University. Darren M. Dawson was born in 1962 in Macon Georgia. He received an Associate Degree in Mathematics from Macon Junior College in 1982 and a B.S. Degree in Electrical Engineering from the Georgia Institute of Technology in 1984. He then worked for Westinghouse as a control engineer from 1985 to 1987. In 1987 he returned to the Georgia Institute of Technology where he received the Ph.D. Degree in Electrical Engineering in March 1990. During this time he also served as a research/teaching assistant. In July 1990 he joined the Electrical and Computer Engineering Department and the Center for Advanced Manufacturing (CAM) at Clemson University where he currently holds the position of Professor. Under the CAM director's supervision he currently leads the Robotics and Manufacturing Automation Laboratory which is jointly operated by the Electrical and Mechanical Engineering departments. His main research interests are in the fields of nonlinear based robust adaptive and learning control with application to electro-mechanical systems including robot manipulators motor drives magnetic bearings flexible cables flexible beams and high-speed transport systems. Aman Behal was born in India in 1973. He received his Masters Degree in Electrical Engineering from Indian Institute of Technology Bombay in 1996. He is currently working towards a Ph.D in Controls and Robotics at Clemson University. His research focuses on the control of no

In this paper, we extend the observer/control strategies previously published in [25] to an n -link, serially connected, direct drive, rigid link, revolute robot operating in the presence of nonlinear friction effects modeled by the Lu-Gre model. In addition, we also present a new adaptive control technique for compensating for the nonlinear parameterizable Stribeck effects. Specifically, an adaptive observer/controller scheme is developed which contains a feedforward approximation of the Stribeck effects. This feedforward approximation is used in a composite controller/observer strategy which forces the average square integral of the position tracking error to an arbitrarily small value. Experimental results are included to illustrate the performance of the proposed controllers.

关键词： Friction compensation nonlinear control

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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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Cooperative Graph Search Using Fractal Decomposition

Cooperative Graph Search Using Fractal Decomposition

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American control Conference (ACC)

作者： James R. Riehl Joao P. Hespanha Center for Control Dynamical Systems and Computation Electrical and Computer Engineering Department University of California Santa Barbara CA USA

We present an algorithm based on hierarchical decomposition that finds close-to-optimal search paths for a cooperative team of agents searching for one or more targets on a graph. The method partitions the graph to create a high-level problem and several lower-level problems. Since the computations on each level are identical, the lower-level problems can be further decomposed. In this way, the problem becomes fractal in nature. We use best-case and worst-case instances of the decomposed problem to establish upper and lower bounds on the optimal search reward, and the bounds are determined with much less computation than what is required to solve the full problem. We show that as the number of decomposition levels increases, the computational complexity approaches O(n) at the expense of looser bounds on the optimal reward. A large-scale test case shows that this method is computationally fast, produces good results, and achieves true cooperation between agents.

关键词： Fractals Search problems Partitioning algorithms Computational complexity Distributed computing Military computing Cities and towns Large-scale systems Testing Autonomous agents

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Design of explosive-driven ferroelectric pulse generators with outputs exceeding 200 kV

Design of explosive-driven ferroelectric pulse generators wi...

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2005 IEEE Pulsed Power Conference, PPC

作者： Holt, S. Dickens, J. Walter, J. Calico, S. Center for Pulsed Power and Power Electronics Research Departments of Electrical and Computer Engineering and Physics Texas Tech. University Lubbock TX 79409-3102 United States Lockheed Martin Missiles and Fire Control Dallas TX 75265-0003 United States

ISBN: (纸本)078039190X

The design and testing of explosive-driven ferroelectric generators (FEGs) with output voltages exceeding 200 kV is presented. The generator design is aimed at achieving high voltages in a compact device by explosively compressing stacks of ferroelectric ceramic discs. The ferroelectric used in this application is EC-64 lead zirconatetitanate (PZT), a hard ferroelectric ceramic with a high dielectric constant and a good piezoelectric coupling coefficient in the direction of polarization. The pressure impulse is generated by high explosive detonating cord and travels longitudinally along the polarization vector in the PZT. The effect of variations in the rise-time, width, and magnitude of the pressure pulse on the peak voltage has been experimentally studied by modifying the ferroelectric stack and explosive driver geometries. Different dielectric insulations are experimentally evaluated for good compatibility with the ferroelectrics and maximum hold-off voltage. © 2005 IEEE.

关键词： Ferroelectric ceramics

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The Kalman Filter Information Fusion for Cement Mill control Based on Local Linear Neuro-Fuzzy Model

The Kalman Filter Information Fusion for Cement Mill Control...

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International Conference on Innovations in Information Technology

作者： Amin Ramezani Hamed Ramezani B. Moshiri Faculty of Electrical and Computer Engineering University of Tehran Iran Faculty of Electrical and Computer Engineering Shahid Beheshti University Tehran Iran ECE and the Control and Intelligent Processing Center of Excellence (CIPCE) University of Tehran Tehran Iran

In this paper, to improve quality control system and being in the competition at a cement production line, we proposed a novel approach for model reference control of a cement milling circuit by implementing local linear neuro-fuzzy model (LLNFM) and Kalman filter information fusion (KFIF). To do so, first gathered information from distributed sensor network (DSN), deployed in the plant, is used to model under-control process based on the LLNFM approach. This LLNFM is used to prepare data for a KFIF system to derive the form of the control vector with the goal of driving the response of the system to that of a desired model in a noisy operating environment. The paper demonstrates the extraction of the reference models and the derivation of the control laws and the results observed justify the tracking and stability claims of the paper.

关键词： Milling machines State estimation Circuits Robust stability Process control Intelligent control Quality control Production systems Working environment noise Data mining

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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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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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