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Research priorities in modeling the transmission risks of H7N9 bird flu

Infectious Diseases of Poverty 2013年第1期2卷 137-142页

作者： Viroj Wiwanitkit Benyun Shi Shang Xia Guo-Jing Yang Xiao-Nong Zhou Jiming Liu Wiwanitkit House 10160BangkhaeBangkokThailand Hainan Medical University Haikou 570100China Faculty of Medicine University of NisNis 18000Serbia Department of Computer Science Hong Kong Baptist UniversityWaterloo RoadKowloon TongHong Kong The Jockey Club School of Public Health and Primary Care Chinese University of Hong KongNew TerritoriesHong Kong National Institute of Parasitic Diseases Chinese Center for Disease Control and PreventionShanghai 200025China Key Laboratory of Parasite and Vector Biology MOHShanghai 200025China WHO Collaborating Center for Malaria Schistosomiasis and FilariasisShanghai 200025China

The epidemic of H7N9 bird flu in eastern China in early 2013 has caused much attention from researchers as well as public health *** issue on modeling the transmission risks is very interesting *** this article,this issue is debated and discussed in order to promote further researches on prediction and prevention of avian influenza viruses supported by better interdisciplinary datasets from the surveillance and response system.

关键词： H7N9 Bird flu Transmission Modeling Priorities

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Robust stabilization and disturbance attenuation for a class of underactuated mechanical systems

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Journal of Central South University 2012年第9期19卷 2488-2495页

作者：赖旭芝潘昌忠吴敏佘锦华 Simon X.YANG School of Information Science and Engineering Central South University Hunan Engineering Laboratory for Advanced Control and Intelligent Automation(Central South University) School of Engineering University of Guelph School of Computer Science Tokyo University of Technology

The robust control problem for a class of underactuated mechanical systems called acrobots is addressed. The goal is to drive the acrobots away from the straight-down position and balance them at the straight-up unstable equilibrium position in the presence of parametric uncertainties and external disturbance. First, in the swing-up area, it is shown that the time derivative of energy is independent of the parameter uncertainties, but exogenous disturbance may destroy the characteristic of increase in mechanical energy. So, a swing-up controller with compensator is designed to suppress the influence of the disturbance. Then, in the attractive area, the control problem is formulated into a H~ control framework by introducing a proper error signal, and a sufficient condition of the existence of Hoo state feedback control law based on linear matrix inequality （LMI） is proposed to guarantee the quadratic stability of the control system. Finally, the simulation results show that the proposed control approach can simultaneously handle a maximum ±10% parameter perturbation and a big disturbance simultaneously.

关键词： underactuated mechanical systems robust stabilization disturbance attenuation H∞ linear matrix inequality （LMI）

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Multi-Agent Consensus under Delayed Feedback: Fundamental Constraint on Graph and Fundamental Bound on Delay

Multi-Agent Consensus under Delayed Feedback: Fundamental Co...

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American control Conference

作者： Tian Qi Li Qiu Jie Chen Center for Control and Optimization School of Automation Science and Engineering South China University of Technology Guangzhou China work performed while at Hong Kong University of Science and Technology Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong Department of Electronic Engineering City University of Hong Kong Kowloon Hong Kong

ISBN: (纸本)9781479901777

In this paper, we study the consensus problem for discrete-time multi-agent systems over an undirected, fixed network communication graph. We assume that the agents' input is subject to a constant albeit possibly unknown time delay, and employ a distributed dynamic state feedback control protocol. Drawing upon concepts and techniques from robust control, notably those concerning gain margin optimization and analytic interpolation, we derive explicit, closed-form conditions for general linear agents to achieve consensus. Our results display an explicit dependence of the consensus condition on the agent's unstable dynamics and the delay value, showing that delayed communication between agents will generally hinder consensus and impose restrictions on the network topology. We also show that a lower bound on the maximal delay allowable for consensus can be computed by a simple line search method.

关键词： agents network maximal Agents Maximal delay Line graph Network topology Delayed Feedback Explicit

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Planning efficient and robust behaviors for model-based power tower inspection

Planning efficient and robust behaviors for model-based powe...

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2012 2nd International Conference on Applied Robotics for the Power Industry, CARPI 2012

作者： Wu, Hua Lv, Min Liu, Chang-An Liu, Chun-Yang School of Control and Computer Engineering North China Electric Power University Beijing102206 China School of Computer and Communication Engineering University of Science and Technology Beijing Beijing100083 China

ISBN: (纸本)9781467345873

This article puts forward a novel idea of power tower inspection depending on model-based behavior planning. It mainly focuses on the problems caused by uncertain security, flight time limitation and stochastic noise affection when inspecting with flying robot. Firstly, we construct a safety space and some target viewing regions based on the model of the power tower. Then a reinforcement learning procedure is adopted to find an optimal policy of guiding the inspection behavior. Experimental results show that the model-based behavior planning improves the efficiency of the inspection significantly even with the wind gusts or stochastic interferences. © 2012 IEEE.

关键词： Reinforcement learning

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Meanshift algorithm based on kernel bandwidth adaptive adjust

Meanshift algorithm based on kernel bandwidth adaptive adjus...

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Chinese control Conference (CCC)

作者： Yunji Zhao Hailong Pei Baoluo Liu School of Electrical Engineering and Automation Henan Polytechnic University Jiaozuo 454000 China Key Laboratory of Autonomous Systems and Networked Control (South China University of Technology) Ministry of Education Guangzhou 510640 China Department of Computer and Information Engineering Luoyang Institute of Science and Technology Henan 471023 China

Object tracking algorithm based on Meanshift algorithm with fixed kernel bandwidth does not realize object tracking correctly with the scale of object changed. According to this, a scheme of kernel bandwidth adaptive adjustment and predictions of object cancroids based on Kalman filter is proposed in this paper. In this algorithm, Object location predicted based on Kalman filter is used to initialize the Meanshift algorithm. The variation tendency of the kernel bandwidth is also determined based on Kalman filter. Experiment results demonstrate that this algorithm can realize the kernel bandwidth adaptive adjustment and object location prediction. The robustness of the tracking algorithm is also enhanced.

关键词： Prediction algorithms Kalman filters Electronic mail Kernel Bandwidth Robustness Conferences

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Prediction of Endpoint Phosphorus Content of Molten Steel in BOF Using Weighted K-Means and GMDH Neural Network

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Journal of Iron and Steel Research International 2012年第1期19卷 11-16页

作者： WANG Hong-bing XU An-jun AI Li-xiang TIAN Nai-yuan School of Computer and Communication Engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory of Advanced Control of Iron and Steel Process of Ministry of Education Beijing 100083China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China

The hybrid method composed of clustering and predicting stages is proposed to predict the endpoint phos- phorus content of molten steel in BOF （Basic Oxygen Furnace）. At the clustering stage, the weighted K-means is performed to generate some clusters with homogeneous data. The weights of factors influencing the target are calcu- lated using EWM （Entropy Weight Method）. At the predicting stage, one GMDH （Group Method of Data Handling） polynomial neural network is built for each cluster. And the predictive results from all the GMDH polynomial neural networks are integrated into a whole to be the result for the hybrid method. The hybrid method, GMDH polnomial neural network and BP neural network are employed for a comparison. The results show that the proposed hybrid method is effective in predicting the endpoint phosphorus content of molten steel in BOF. Furthermore, the hybrid method outperforms BP neural network and GMDH polynomial neural network.

关键词： basic oxygen furnace endpoint phosphorus content K-means neural network GMDH

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Methodology for identifying quadrotor parameters, attitude estimation and control

Methodology for identifying quadrotor parameters, attitude e...

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IEEE/ASME (AIM) International Conference on Advanced Intelligent Mechatronics

作者： M. Elsamanty A. Khalifa M. Fanni A. Ramadan A. Abo-Ismail Mechatronics and Robotics Engineering Department School of Innovative Design Engineering Egypt-Japan University of Science and Technology Alexandria Egypt Production. Engineering & Mechanical Design Department Faculty of Engineering Mansoura University Mansoura Egypt Computer & Automatic Control Department Faculty of Engineering Tanta University Tanta Egypt

ISBN: (纸本)9781467353199

This paper describes a methodology to identify all the parameters of a quadrotor system including the structure parameters and rotor assembly parameters. A CAD model is developed using SOLIDWORKS to calculate the mass moment of inertia and all the missing geometrical parameters. A three simple test rigs are built and used to identify the relationship between the motor input Pulse Width Modulation (PWM) signal and the angular velocity, the thrust force, and drag moment of the rotors. A simple algorithm is implemented to an inertial measurement unit (IMU) for estimating the attitude and altitude of the quadrotor. Experimental set up is built to verify and test the accuracy of these proposed techniques. A controller is designed based on the feedback linearization method such that the quadrotor attitude can be stabilized. Finally, the experimental results show the effectiveness of the proposed techniques and the controller design.

关键词： Rotors Pulse width modulation Propellers Force Drag Angular velocity Assembly

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A novel image reconstruction algorithm based oncompressed sensing for electrical capacitance 5

A novel image reconstruction algorithm based oncompressed se...

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5th International Symposium on Computational Intelligence and Industrial Applications, ISCIIA 2012

作者： Deyun, Chen Zhiqiang, Li Zhen, Zhang Liyuan, Xu Wenxin, Yu Xiaoyang, Yu School of Computer Science and Technology Harbin University of Science and Technology Harbin China School of Measurement-Control and Communication Engineering Harbin University of Science and Technology Harbin China

According to the image reconstruction accuracy influenced by the "soft field" nature and the limited projection data in electrical capacitance tomography, based on the working principle of the electrical capacitance tomography system, a Novel image reconstruction algorithm based on compressed sensing is proposed in the paper. The method based on ART (algebra reconstruction technique) organically combines the gradient sparse of image and ART, and reduces the norm of image gradient with full-variational method, and improves the accuracy and speed of image reconstruction. Experimental results and simulation data indicate that the imaging accuracy is markedly improved, and the image is closed to the *** new algorithm presents a feasible and effective way to research on image reconstruction algorithm for Electrical Capacitance Tomography System.

关键词： Image reconstruction

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Comparison of Corner Detector and Region Detector for Vision-Based SLAM

Comparison of Corner Detector and Region Detector for Vision...

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International Conference on control, Automation and Systems

作者： Byung-moon Jang Tae-jae Lee Dong-hoon Lee Kyung-min Han Dong-il "Dan" Cho Automation and Systems Research Institute (ASRI) and School of Electrical Engineering and Computer Science Seoul National University Kwanak-ku Seoul 151-742 Korea LG electronics Tech. Control Team HA Control R&D Lab Gassan R&D Campus 327-23 Gasan-dong Geumcheon-gu Seoul 153-802 Korea

ISBN: (纸本)9781479905492

This paper presents the performances of a corner detector and a region detector in vision-based Simultaneous Localization and Mapping (SLAM). In vision-based SLAM, a feature detection process for data-association is the first step. Therefore, the repeatability of a feature detector is important. Feature detectors are generally categorized as the region detector and the corner detector. There are conflicting research results for the repeatability of corner detectors and region detectors. This paper shows SLAM results using a corner detector and a region detector. Extended Kalman Filters (EKF) are used for implementing the two SLAM methods. The localization errors are evaluated quantitatively. From the experimental results, it is demonstrated that the comer detector is more efficient than the region detector for the work performed in this paper.

关键词： SLAM comer detector region detector blob vision

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BosonSampling with realistic single-photon sources

BosonSampling with realistic single-photon sources

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Conference on Lasers and Electro-Optics Europe

作者： Matthew A. Broome Alessandro Fedrizzi Saleh Rahimi-Keshari Agata M. Branczyk Justin Dove Scott Aaronson Timothy C. Ralph Andrew G. White Centre for Engineered Quantum Systems School of Mathematics and Physics University of Queensland Brisbane 4072 Australia Centre for Quantum Computer and Communication Technology School of Mathematics and Physics University of Queensland Brisbane 4072 Australia Department of Chemistry and Centre for Quantum Information and Quantum Control 80 St. George Street University of Toronto Toronto Ontario M5S 3H6 Canada Computer Science and Artificial Intelligence Laboratory Massachusetts Institute of Technology Cambridge MA 02139 USA

ISBN: (纸本)9781479905942

The extended Church-Turing thesis posits that any computable function can be calculated efficiently by a probabilistic Turing machine. If this thesis held true, the global effort to build quantum computers might ultimately be unnecessary. The thesis would however be strongly contradicted by a physical device that efficiently performs a task believed to be intractable for classical computers. BosonSampling - the sampling from a distribution of n photons undergoing some linear-optical process - is a recently developed, experimentally accessible example of such a task [1].

关键词： Avalanche photodiodes Interference Nonlinear optical crystals Parametric down conversion Photons Quantum optics

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