检索结果-内蒙古大学图书馆

27th IASTED International Conference on Modelling, Identification, and control

作者： Keviczky, L. Bányász, Cs. Computer and Automation Research Institute Control Engineering Research Group Hungarian Academy of Sciences Kende u 13-17 H-1111 Budapest Hungary

The model based realizability loss part of the sensitivity function in a generic two-degree of freedom (TDOF) control system has an important role in shaping the deviation between our design goal and the nominal close... 详细信息

ISBN: (纸本)9780889867116

关键词： Degrees of freedom (mechanics)

来源：评论

学校读者我要写书评

暂无评论

Upper bounds for the secure key rate of the decoy-state quantum key distribution

引用

Physical Review A 2009年第3期79卷 032335-032335页

作者： Marcos Curty Tobias Moroder Xiongfeng Ma Hoi-Kwong Lo Norbert Lütkenhaus Department of Signal Theory and Communications ETSI Telecomunicación University of Vigo Campus Universitario E-36310 Vigo (Pontevedra) Spain Institute for Quantum Computing University of Waterloo Waterloo Ontario Canada N2L 3G1 Quantum Information Theory Group Institut für Theoretische Physik I and Max-Planck Research Group Institute of Optics Information and Photonics University of Erlangen–Nürnberg 91058 Erlangen Germany Department of Electrical and Computer Engineering and Department of Physics Center for Quantum Information and Quantum Control (CQIQC) University of Toronto Toronto Ontario Canada M5S 3G4

The use of decoy states in quantum key distribution (QKD) has provided a method for substantially increasing the secret key rate and distance that can be covered by QKD protocols with practical signals. The security analysis of these schemes, however, leaves open the possibility that the development of better proof techniques or better classical postprocessing methods might further improve their performance in realistic scenarios. In this paper, we derive upper bounds on the secure key rate for decoy-state QKD. These bounds are based basically only on the classical correlations established by the legitimate users during the quantum communication phase of the protocol. The only assumption about the possible postprocessing methods is that double click events are randomly assigned to single click events. Further, we consider only secure key rates based on the uncalibrated device scenario which assigns imperfections such as detection inefficiency to the eavesdropper. Our analysis relies on two preconditions for secure two-way and one-way QKD. The legitimate users need to prove that there exists no separable state (in the case of two-way QKD) or that there exists no quantum state having a symmetric extension (one-way QKD) that is compatible with the available measurements results. Both criteria have been previously applied to evaluate single-photon implementations of QKD. Here we use them to investigate a realistic source of weak coherent pulses. The resulting upper bounds can be formulated as a convex optimization problem known as a semidefinite program which can be efficiently solved. For the standard four-state QKD protocol, they are quite close to known lower bounds, thus showing that there are clear limits to the further improvement of classical postprocessing techniques in decoy-state QKD.

关键词： Quantum cryptography

来源：评论

学校读者我要写书评

暂无评论

A New Iterative Procedure to Obtain H-infinity, L-infinity Optimal Regulators

引用

IFAC Proceedings Volumes 2008年第2期41卷 8791-8796页

作者： L. Keviczky Cs. Bányász Computer and Automation Research Institute and Control Engineering Research Group Hungarian Academy of Sciences H-1111 Budapest Kende u 13-17 HUNGARY

The sensitivity function in a generic two-degree of freedom ( TDOF ) control system can be decomposed into three major parts: design-, realizability- and modeling-loss. The paper investigates the optimality of the sec... 详细信息

关键词： Optimal regulator error decomposition Youla-parametrization

来源：评论

学校读者我要写书评

暂无评论

H-infinity, L-infinity optimal Youla regulators for two-degree of freedom control systems

H-infinity, L-infinity optimal Youla regulators for two-degr...

引用

Mediterranean Conference on control and automation (MED)

作者： Cs. Banyasz L. Keviczky Computer and Automation Research Institute and Control Engineering Research Group Hungarian Academy of Sciences (ATOMKI) Budapest Hungary

The sensitivity function can be decomposed into three major parts: design-, realizability- and modeling-loss. The paper investigates the optimality of the second term in infinite norm spaces and proposes a new iterati... 详细信息

关键词： automation Conferences

来源：评论

学校读者我要写书评

暂无评论

An optimal permissible source region strategy for multispectral bioluminescence tomography

引用

Optics Express 2008年第20期16卷 15640-15654页

作者： Feng, Jinchao Jia, Kebin Yan, Guorui Zhu, Shouping Qin, Chenghu Lv, Yujie Tian, Jie College of Electronic Information and Control Engineering Beijing University of Technology Medical Image Processing Group Institute of Automation Chinese Academy of Sciences P. O. Box 2728 Beijing 100190 China Life Science Research Center Xidian University Xi'an. 710071 China

Multispectral bioluminescence tomography (BLT) attracts increasing more attention in the area of small animal studies because multispectral data acquisition could help in the 3D location of bioluminescent sources. Generally, BLT problem is ill-posed and a priori information is indispensable to reconstruction bioluminescent source uniquely and quantitatively. In this paper, we propose a spectrally solved bioluminescence tomography algorithm with an optimal permissible source region strategy. Being the most different from earlier studies, an optimal permissible source region strategy which is automatically selected without human intervention is developed to reduce the ill-posedness of BLT and therefore improves the reconstruction quality. Furthermore, both numerical stability and computational efficiency benefit from the strategy. In the numerical experiments, a heterogeneous phantom is used to evaluate the proposed algorithm and the synthetic data is produced by Monte Carlo method for avoiding the inverse crime. The results demonstrate the feasibility and potential of our methodology for reconstructing the distribution of bioluminescent sources. © 2008 Optical Society of America.

关键词： Monte Carlo methods

来源：评论

学校读者我要写书评

暂无评论

Identification of the primary circuit dynamics in a pressurized water nuclear power plant

引用

IFAC Proceedings Volumes 2008年第2期41卷 10640-10645页

作者： Csaba Fazekas Gábor Szederkényi Katalin M. Hangos Process Control Research Group Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences P.O. Box 63 H-1518 Budapest Hungary

This paper presents the results of the parameter estimation procedure for the primary circuit dynamics of a VVER-type nuclear power plant. The model structure is a low dimensional lumped nonlinear model published previously in Fazekas et al. [2007a]. The parameter estimation method uses the modular decomposition of the system model for obtaining physically meaningful initial parameter estimates. The final parameter estimates are computed using the integrated model.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Decentralized Robust PI controller Design For An Industrial Utility Boiler - An IMC Method

引用

IFAC Proceedings Volumes 2008年第2期41卷 14235-14240页

作者： Horacio Jose Marquez Batool Labibi Tongwen Chen Advanced Process Automation and Control (APAC) Research Group K. N. Toosi University of Technology Tehran Iran Electrical and Computer Engineering Department University of Alberta Edmonton Canada

This paper presents a scheme for designing a robust decentralized PI controller for an industrial utility boiler system. First, a new method for designing robust decentralized PI controllers for uncertain LTI MIMO systems is presented. Sufficient conditions for closed-loop stability and diagonal dominance of a multivariable system are given. For each isolated subsystem a first order approximation is obtained. Then, achieving robust stability and closedloop diagonal dominance is formulated as local robust performance problems. It is shown by selecting time constants of the closed-loop isolated subsystems appropriately, these local robust performance problems are solved and the interactions between closed-loop stabilized subsystems are attenuated. The internal model control (IMC) method is used to design local PI controllers. The suggested design strategy is applicable to unstable systems as well. Thereafter, the nonlinear model of an industrial utility boiler is linearized about its operating points and the nonlinearity is modeled as uncertainty for a nominal LTI MIMO system. Using the new proposed method, a decentralized PI controller for the uncertain LTI nominal model is designed. The designed controller is applied to the real system. The simulation results show the effectiveness of the proposed methodology.

关键词：

来源：评论

学校读者我要写书评

暂无评论

IEEE Transactions on Haptics: Editorial

引用

IEEE Transactions on Haptics 2008年第1期1卷 2-8页

作者： Edward Colgate, J. Lederman, Susan Prattichizzo, Domenico Barbagli, Federico Basdogan, Cagatay Buss, Martin Ernst, Marc Frisoli, Antonio Gillespie, Brent Grant, Danny Harders, Matthias Hayward, Vincent Jones, Lynette Kajimoto, Hiroyuki Kappers, Astrid Kheddar, Abderrahmane Lin, Ming C. MacLean, Karon Miller, Brian Noma, Haruo Okamura, Allison M. O'Malley, Mareia Ryu, Jeha Tan, Hong Z. Yokokohji, Yasuyoshi Department of Psychology School of Computing Queen's University Canada IEEE Robotics and Automation Society Tübingen Germany Stanford University's Computer Science Department Tübingen Germany Institute of Automatic Control Engineering Technische Universität München Germany Independent Research Group Multisensory Perception and Action Max Planck Institute for Biological Cybernetics Tübingen Germany Department of Applied Mechanics SSSA Japan Research Division Virtual Reality and Telerobotic Systems PERCRO Laboratory Japan Department of Mechanical Engineering Japan Department of Robotics McGill University Canada Computer Vision Lab ETH Zurich Japan Virtual Reality in Medicine Group Japan IEEE CS/RAS Technical Committee on Haptics Japan Department of Electrical and Computer Engineering McGill University Canada Department of Mechanical Engineering MIT Japan University of Electro-Communications Japan Department of Physics and Astronomy Utrecht University Netherlands University of Evry France Chapel Hill United States Department of Computer Science University of British Columbia Canada ATR Knowledge Science Lab United Kingdom Department of Mechanical Engineering Denmark Johns Hopkins University United States Laboratory for Computational Sensing and Robotics United Kingdom Engineering Research Center for Computer-Integrated Surgical Systems and Technology United States Mechanical Engineering and Materials Science Department Rice University United States Korea Republic of Department of Electrical and Computer Engineering Mechanical Engineering and Psychological Sciences Purdue University United States Department of Mechanical Engineering and Science Graduate School of Engineering Kyoto University Japan

No abstract available

关键词：

来源：评论

学校读者我要写书评

暂无评论

Real-Time Level Plant control Using Improved BELBIC

引用

IFAC Proceedings Volumes 2008年第2期41卷 4631-4635页

作者： M. Masoudinejad R. Khorsandi A. Fatehi C. Lucas S. Fakhimi Derakhshan M.R. Jamali Advanced Process Automation & Control (APAC) Research Group Faculty of Electrical Engineering K. N. Toosi University of Technology Tehran Iran Center of Excellence for Control and Intelligent Processing Electrical and Computer engineering Department University of Tehran Iran

Brain emotional learning based intelligent controller (BELBIC) is based on computational model of limbic system in the mammalian brain. In recent years, this model was applied in many linear and nonlinear control applications. Previous studies show that this controller has fast response, simple implementation and robustness with respect to disturbances. It is also possible to define emotional signal based on control application objectives. But in the previous studies, internal instability of this controller was not considered and control task were done in limited time period. In this article mathematical description of BELBIC is investigated and improved to avoid internal instability. Simulation and implementation of improved model was done on level plant. The obtained results showed that instability of model has been solved in the new model without loss of performance by using Integral Anti Windup (IAW).

关键词：

来源：评论

学校读者我要写书评

暂无评论

Modelling and identification of a small unmanned aerial vehicle

Modelling and identification of a small unmanned aerial vehi...

引用

作者： Soumelidis, Alexandres Gaspar, Péter Bauer, Péter Balas, Gary Systems and Control Lab Computer and Automation Research Institute Hungarian Academy of Sciences Kende st 13-17 Budapest H-1111 Hungary Dept. of Control and Transport Automation Faculty of Transportation Engineering Budapest University of Technology and Economics Bertalan Lajos st 2 Budapest H-1111 Hungary Dept. of Aerospace Engineering and Mechanics Institute of Technology University of Minnesota 110 Union st SE Minneapolis MN 55455-0153 United States

ISBN: (纸本)9789633130117

The field of Unmanned Aerial Vehicles (UAV) has gained great significance in the R&D activities of several institutions, and numerous realizations have been constructed. controlling the movement of a UAV is one of the most significant tasks in the hierarchical control system that should be realized in order to successfully manage UAVs in several missions. Precise control of the movement requires accurate mathematical models of the aircraft that correspond to the several control schemes that are intended to apply, including linearised, LPV, and nonlinear ones. The source of mathematical models includes the physical model constructed on the basis of the Newtonian equations and the rules of aerodynamics, as well as the use of empirical observations, measurements. The methodology of system identification offers the tools that can be used to manage this field. The Systems and control Laboratory of the computer and automation research institute in cooperation with University of Minnesota and Budapest University of Technology and Economics has built - as a part of a more general framework established to solve complex UAV control problems - small UAVs, equipped with on-board sensors and embedded computer with the purpose of obtaining an adequate test platform for the aircraft experiments. Based on on-board measurements acquired during the flight tests performed with the UAVs, the opportunity has been given to test several system identification approaches corresponding to the control tasks to be solved. This paper gives an outline of the system identification and modelling methods that have successfully been applied, and also analyzes the problems encountered in the data-acquisition - signal processing - computing chain.

关键词： Unmanned aerial vehicles (UAV)

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：