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American control Conference (ACC)

作者： P. Krishnamurthy F. Khorrami D. Schoenwald Control/Robotics Research Laboratory(CRRL) Department of Electrical and Computer Engineering Six Metrotech Center Polytechnic University Brooklyn NY USA Sandia National Laboratories Albuquerque NM USA

We propose a new inventory control technique for large-scale bidirectional (or closed-loop) supply chains including repairs. It is well-known that available optimization techniques are computationally intractable for bidirectional stochastic supply chains and also necessitate several simplifying assumptions. In contrast, the proposed approach is an adaptive scheme which scales well to practically interesting large-scale multi-item supply chains. Furthermore, practical issues such as stochastic transport delays, manufacturing times, and repair times and probabilistic characterization of part repair success are handled in a unified framework. The control scheme is based on a hierarchical two-level architecture comprised of an adaptive set-point generator and a lower-level order-up-to policy. An application to aircraft supply chains involving multiple OEMs, depots, bases, squadrons, and planes is also investigated

关键词： Inventory control Large-scale systems Supply chains Laboratories Manufacturing Stochastic processes Aircraft manufacture Programmable control Adaptive control Transportation

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Nonlinear modeling of a flight vehicle using fuzzy clustering

Nonlinear modeling of a flight vehicle using fuzzy clusterin...

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IEEE International Conference on Granular Computing (GRC)

作者： A.R. Mehrabian S.V. Hashemi J. Roshanian S. Mohagheghi The Control and Intelligence Processing Center of Excellence University of Tehran Iran Department of AeroSpace Engineering K.N. Toosi University of Technology Tehran Iran School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA USA

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Delay-dependent stability of 2D state-delayed linear systems

Delay-dependent stability of 2D state-delayed linear systems

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： W. Paszke J. Lam K. Galkowski Shengyuan Xu E. Rogers A. Kummert Institute of Control and Computation Engineering University of Zielona Góra Zielona Gora Poland Department of Mechanical Engineering University of Hong Kong Hong Kong China Department of Automation Nanjing University of Science and Technology of PLA Nanjing China Faculty of Electrical Information and Media Engineering University of Wuppertal Wuppertal Germany School of Electronics and Computer Science University of Southampton Southampton UK

This paper addresses the problem of stability for two-dimensional systems with delays in the state. To solve this problem, the Lyapunov second method is used. The resulting condition is written in terms of linear matrix inequalities and it is dependent on the size of delays. This fact allows us to reduce the conservatism in the stability analysis of two-dimensional systems with state delays. A simulation example is given to illustrate the theoretical developments

关键词： Stability Linear systems Delay systems Symmetric matrices control systems Linear matrix inequalities Delay lines Automatic control control engineering computing Mechanical engineering

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ROBUST STABILITY CHECKING OF A CLASS OF LINEAR INTERVAL FRACTIONAL ORDER SYSTEM USING LYAPUNOV INEQUALITY

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IFAC Proceedings Volumes 2006年第11期39卷 89-94页

作者： Hyosung Ahn YangQuan Chen Igor Podlubny Center for Self-Organizing and Intelligent Systems (CSOIS) Department of Electrical and Computer Engineering Utah State University Logan UT 84322-4160 USA Department of Applied Informatics and Process Control Technical University of Kosice B. Nemcovej 3 04200 Kosice Slovak Republic

This paper provides a new analytical robust stability checking method of fractional-order linear time invariant interval uncertain system. This paper continues the authors’ previous work (Chen et al., 2005a) where matrix perturbation theory was used. For the new robust stability checking, Lyapunov inequality is utilized for finding the maximum eigenvalue of a Hermitian matrix. Through numerical examples, the usefulness and the effectiveness of the newly proposed method are verified.

关键词： Fractional order linear dynamic systems robust stability interval linear time invariant systems interval matrix

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The Method of Data Pre-processing in Grey Information Systems

The Method of Data Pre-processing in Grey Information System...

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International Conference on control, Automation, Robotics and Vision (ICARCV)

作者： S.X. Wu S.F. Liu M.Q. Li School of Economics and Management Nanjing University of Aeronautics and Astronautics Nanjing China Center for Systems and Control Xiamen University Xiamen Fujian China Department of Electrical & Computer Engineering National University of Singapore Singapore

In this paper, a method of data pre-processing in grey information systems was proposed to deal with grey information. The binning technique was introduced to smooth noisy data used for grey relative analysis. It constructed the function of grey relative coefficient for each null value and filled up the null value with the solution of the function. It also can be used to detect noisy data. This method is an application of grey system theory in data pre-processing. It has great significance in filling up null values and detecting noisy data in the "poor" information database

关键词： Information systems Data mining Databases engineering management control systems Null value Filling Management information systems Statistical distributions Smoothing methods

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碳纳米管灯泡发光性能研究

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科学通报 2006年第14期51卷 1725-1728页

作者：李传刚王昆林韦进全魏秉庆朱宏伟王志诚骆建彬刘文今郑明新吴德海清华大学机械工程系先进成形制造教育部重点实验室 Department of Electrical & Computer Engineering and Center for Computation & Technology Louisiana State UniversityBaton RougeLA 70803USA

采用长度为分米量级的双壁碳纳米管薄膜与长丝制成了碳纳米管灯泡，并与钨丝白炽灯作对比，研究了碳纳米管灯泡的发光效率、电工参数以及热稳定性能．结果表明，碳纳米管灯泡可以发出与钨丝白炽灯相同的白光，在相同温度（1400～2300K... 详细信息

采用长度为分米量级的双壁碳纳米管薄膜与长丝制成了碳纳米管灯泡，并与钨丝白炽灯作对比，研究了碳纳米管灯泡的发光效率、电工参数以及热稳定性能．结果表明，碳纳米管灯泡可以发出与钨丝白炽灯相同的白光，在相同温度（1400～2300K）下，碳纳米管灯泡的光效比钨丝灯泡平均提高40％．碳纳米管灯丝电阻随温度变化不明显，并且具有较高的热稳定性能，2300K高温下通电24h，结构不发生明显变化．

关键词：碳纳米管灯泡电致发光

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Study of Grey Rough Set Model Based on Tolerance Relation

Study of Grey Rough Set Model Based on Tolerance Relation

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International Conference on control, Automation, Robotics and Vision (ICARCV)

作者： S.X. Wu S.H. Shi S.F. Liu M.Q. Li School of Economics and Management Nanjing University of Aeronautics and Astronautics Nanjing China Center for Systems and Control Xiamen University Xiamen Fujian China Department of Electrical & Computer Engineering National University of Singapore Singapore Department of Computer Shenzhen Polytechnic Shenzhen Guangdong China

This paper analyses several extended rough set models in incomplete information systems and proposes a tolerance relation based model of processing grey incomplete information systems, which is an extension to rough set models. The method of the model is: firstly partitioning the original incomplete information system by introduced threshold value, then establishing tolerance classes through grey tolerance relation and obtaining upper and lower approximations through these tolerance classes. Moreover, a method of whitening grey numbers based on grey tolerance relation is given. This paper shows that the model accords with practice according to examples and the algorithm of whitening grey numbers is also comparatively ideal. The more important point is that the subjective needs are considered during partitioning grey tolerance classes by introducing threshold value. So it is consistent with the system methodology of person-oriented person-to-machine communication

关键词： Information systems Set theory control systems Rough sets Concurrent computing engineering management Stress control Null value Humans Information analysis

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Fuzzy-AHP method for measuring Intellectual Capital in Iran insurance industry

Fuzzy-AHP method for measuring Intellectual Capital in Iran ...

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IEEE International Conference on Management of Innovation and Technology, ICMIT

作者： Adel Moslehi Ali Mohaghar Kambiz Badie Caro Lucas University of Tehran Tehran Tehran IR Management Faculty Department of Industrial Management University of Tehran Iran Info Society Department Iran Telecom Research Center Iran Center of Excellence for Control and Intelligent Processing Department of Electrical and Computer Engineering University of Tehran Iran

Intellectual capital and knowledge management literature is prolific relates to the importance of measuring intellectual capital but a few of the retrieved literature address the pragmatic application of these management philosophies within companies in real world. This paper explains a proposed method to measuring intellectual capital as a main source of sustainable competitive advantages for most companies especially in service sectors. Based on our research in measurement phases managers should decide about choosing the most appropriate indicators. We use fuzzy-AHP method to find these indicators in Iran insurance industry. Although the application of such model in other industries and in other countries can be arguable, to measuring IC in each industry in each country the application of proposed method seems useful

关键词： Knowledge management Insurance engineering management Integrated circuit modeling Phase measurement Electric variables measurement Communication industry computer industry Industrial control Process control

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Integrated Guidance and control of AUVs Using Shrinking Horizon Model Predictive control

Integrated Guidance and Control of AUVs Using Shrinking Hori...

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OCEANS

作者： Charmane V. Caldwell Emmanuel G. Collins Srinivas Palanki Center for Intelligent System Control and Robotics epartment of Electrical and Computer Engineering Florida A&M University-Florida State University Tallahassee FL USA Center for Intelligent System Control and Robotics Department of Mechanical Engineerin Florida A&M University-Florida State University Tallahassee FL USA Center for Intelligent System Control and Robotics Department of Chemical and Biomedical Engineering Florida A&M University-Florida State University Tallahassee FL USA

There are problems controlling autonomous underwater vehicles (AUVs) because they are nonlinear and coupled and have external environmental disturbances acting on the vehicle. More difficulties arise when the vehicle tasks require precise positioning and control as in military missions. This paper presents an integrated guidance and control method for an AUV. The algorithm is based on an optimal control method called shrinking horizon model predictive control (SHMPC). Scenarios for reconnaissance and reacquisition in mine countermeasures missions are explored applying SHMPC. In addition, there are scenarios with obstacle avoidance. Simulations of this method show the control method is able to systematically handle disturbances and constraints to successfully maneuver through volatile areas

关键词： Predictive models Predictive control Underwater vehicles Remotely operated vehicles Nonlinear control systems Intelligent vehicles Mobile robots Intelligent robots control system synthesis Biomedical engineering

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Stereo Vision based Relative Pose and Motion Estimation for Unmanned Helicopter Landing

Stereo Vision based Relative Pose and Motion Estimation for ...

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International Conference on Information and Automation (ICIA)

作者： Cui Xu Liankui Qiu Ming Liu Bin Kong Yunjian Ge Department of Automation University of Science and Technology Hefei Anhui China Center for Biomimetic Sensing and Control Research Institute of Intelligent Machines Chinese Academy and Sciences Hefei Anhui China Department of Electrical and Computer Systems Engineering Monash University Melbourne VIC Australia

In this paper, we present a real-time stereo vision based pose and motion estimation system that will be used for landing an unmanned helicopter on a moving target such as a ship deck. The vision algorithm mainly consists of a feature extraction task and a pose and motion estimation task. The 2D planer target with regular features defined can significantly simplify the feature extraction task such as corner detection and feature points matching. To effectively estimate the distance between the camera carrier and target a stereo camera system is applied. By means of sub-pixel corner location the precisions of pose estimation and relative motion detection can be improved. We present results from semi-physical simulation which show that our vision algorithm is accurate and robust. The methodology provides an effective subsystem for the development of autonomous robot helicopter that will land on a given target under the guide of vision.

关键词： Stereo vision Motion estimation Helicopters Feature extraction Cameras Robot vision systems Real time systems Marine vehicles Metalworking machines computer vision

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