检索结果-内蒙古大学图书馆

Fuzzy Model-based Servo Control for Discrete-Time Nonlinear systems with Constraints

IFAC Proceedings Volumes 2011年第1期44卷 9029-9034页

作者： Hiroshi Ohtake Kazuo Tanaka Hua O. Wang Department of Mechanical Information Science and Technology Graduate School of Computer Science and Systems Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka Fukuoka 820-8502 Japan Department of Mechanical Engineering and Intelligent Systems The University of Electro-Communications 1-5-1 Chofugaoka Chofu Tokyo 182-8585 Japan Department of Mechanical Engineering Boston University 110 Cummington Street Boston MA 02215 USA

Abstract This paper presents servo control for discrete-time nonlinear systems with constraints on inputs and states using the fuzzy model-based control approach. Firstly, the nonlinear error system is constructed based on error vector between state and the target point by utilizing the input difference between current input and cancellation input. Secondly, the error system is exactly converted into a Takagi-Sugeno fuzzy model utilizing sector nonlinearity approach. Finally, the fuzzy servo controller is designed by simultaneously solving servo controller design condition and the constraint conditions on inputs and states. The design conditions are given in the form of LMI. Servo control with constraints on inputs and states is achieved by the designed servo controller. Design examples illustrate the utility of this approach.

关键词：

来源：评论

学校读者我要写书评

暂无评论

PAC-Bayesian Analysis of Contextual Bandits 11

PAC-Bayesian Analysis of Contextual Bandits

引用

Annual conference on Neural Information Processing systems

作者： Yevgeny Seldin Peter Auer Francois Laviolette John Shawe-Taylor Ronald Ortner Max Planck Institute for Intelligent Systems Tübingen Germany and Department of Computer Science University College London UK Chair for Information Technology Montanuniversität Leoben Austria Département d'informatique Université Laval Québec Canada Department of Computer Science University College London UK

ISBN: (纸本)9781618395993

We derive an instantaneous (per-round) data-dependent regret bound for stochastic multiarmed bandits with side information (also known as contextual bandits). The scaling of our regret bound with the number of states (contexts) N goes as NIpt(S;A)~1/2, where I_pt(S;A) is the mutual information between states and actions (the side information) used by the algorithm at round t. If the algorithm uses all the side information, the regret bound scales as N In K~1/2, where K is the number of actions (arms). However, if the side information I_pt(5;A) is not fully used, the regret bound is significantly tighter. In the extreme case, when I_pt (S;A) = 0, the dependence on the number of states reduces from linear to logarithmic. Our analysis allows to provide the algorithm large amount of side information, let the algorithm to decide which side information is relevant for the task, and penalize the algorithm only for the side information that it is using de facto. We also present an algorithm for multiarmed bandits with side information with O(K) computational complexity per game round.

关键词： side information Regret algorithms information Bound extreme case Bayes methods

来源：评论

学校读者我要写书评

暂无评论

Localization method of multiple targets by Crossing Direction Finding

Localization method of multiple targets by Crossing Directio...

引用

IEEE Conference on Cybernetics and intelligent systems

作者： Wang Ling Shuzhi Sam Ge Department of Electrical and Engineering University of Electrical Science and Technology of China Chengdu Sichuan China Institute of Intelligent Systems and Information Technology (ISIT) University of Electrical Science and Technology of China Chengdu Sichuan China Department of Electrical and Computer Engineering National University of Singapore Singapore

In this paper, a Crossing Direction Finding (CDF) for localizations of multiple targets is proposed by using triangular theory. The location of a target is unique if the directions to other two determined points are known a priori. The two 2D direction-of-arrivals (DOAs) of target are obtained by using two cooperative radars respectively. The 2D DOAs are automatically matching by using L-shape array and conjugate-ESPRIT algorithm. The multiple targets' DOAs are automatically matching by using one reference sensor in multiple coordinate system. This method has less demand on radar system property, while hold a better resolution on localization than single radar detecting algorithm. Simulation results show that the CDF has a well performance on multiple targets localization.

关键词： Arrays Estimation Direction of arrival estimation Spaceborne radar Signal to noise ratio Azimuth

来源：评论

学校读者我要写书评

暂无评论

An Interdisciplinary Approach to Designing Adaptive Lighting Environments

An Interdisciplinary Approach to Designing Adaptive Lighting...

引用

International Conference on intelligent Environments (IE)

作者： Remco Magielse Philip Ross Sunder Rao Tanir Ozcelebi Paola Jaramillo Oliver Amft Designing Quality in Interaction (DQI) Group Department of Industrial Design Intelligent Lighting Institute (ILI) Eindhoven University of Technology Eindhoven Netherlands System Architecture and Networks (SAN) Group Department of Mathematics and Computer Science Intelligent Lighting Institute (ILI) Eindhoven University of Technology Eindhoven Netherlands Signal Processing Systems (SPS) Group Department of Electrical Engineering Intelligent Lighting Institute (ILI) Eindhoven University of Technology Eindhoven Netherlands

Due to advancements in lighting technologies new opportunities for application emerge. In this paper an interdisciplinary study towards the development of adaptive lighting environments is presented. An implementation of an adaptive lighting environment is made in the domain of office work. For evaluation, experts from the domains of human-system interaction, activity and context recognition, and system architecture design are interviewed. Contributions are made with regard to the implementation of the adaptive lighting in office environments and an evaluation method that is in line with the interdisciplinary approach. From the evaluation method insights in the fields of human-computer interaction, activity and context recognition and system architecture and (wireless) networking and in topics that span across these fields are gained.

关键词： Indexes

来源：评论

学校读者我要写书评

暂无评论

Necessary Conditions of Optimality for State Constrained Infinite Horizon Differential Inclusions

Necessary Conditions of Optimality for State Constrained Inf...

引用

IEEE Conference on Decision and Control

作者： Fernando Lobo Pereira Geraldo Nunes da Silva Institute for Systems and Robotics-Porto Faculdade de Engenharia da Universidade do Porto 4200-465 Porto Portugal Department of Computer Science and Statistics Universidade Estadual Paulista COD S. Jose do Rio Preto Brasil

ISBN: (纸本)9781612848006

This article presents and discusses necessary conditions of optimality for infinite horizon dynamic optimization problems with inequality state constraints and set inclusion constraints at both endpoints of the trajectory. The cost functional depends on the state variable at the final time, and the dynamics are given by a differential inclusion. Moreover, the optimization is carried out over asymptotically convergent state trajectories. The novelty of the proposed optimality conditions for this class of problems is that the boundary condition of the adjoint variable is given as a weak directional inclusion at infinity. This improves on the currently available necessary conditions of optimality for infinite horizon problems.

关键词： optimality infinite horizon State variable Novelty Necessary End Point Infinity

来源：评论

学校读者我要写书评

暂无评论

Multifractal analysis of blood oxygen level dependent functional magnetic resonance imaging

Multifractal analysis of blood oxygen level dependent functi...

引用

IEEE International Symposium on Signal Processing and Information Technology (ISSPIT)

作者： Catarina Runa Miranda Filipe Soares Inês Sousa Filipe Janela Mário Forjaz Secca Physics Department Faculty of Sciences and Technology New University of Lisbon Portugal Instituto de Telecomunicações Department of Computer Science University of Beira Interior Portugal Institute for Systems and Robotics Department of Bioengineering Instituto Superior Técnico Portugal Siemens S.A. Healthcare Sector Portugal

The aim of this work is to propose a multifractal analysis method for Multifractal Detrended Fluctuation analysis (MF-DFA) of Blood Oxygen Level Dependent (BOLD) functional Magnetic Resonance Imaging (fMRI). The fMRI signals exhibit a 1/f power spectrum, hence their structure has self-similarity and long memory, being usually successfully analyzed by different fractal analysis methods without a previous knowledge of haemodynamic models. Therefore, to validate activation detection using the MF-DFA method, a comparison study between images obtained using General Linear Model (GLM) and Independent Component Analysis (ICA) was conducted and evaluated by discrimination power, applying Receiver Operating Characteristic (ROC) analysis to the results.

关键词： Transforms Power measurement

来源：评论

学校读者我要写书评

暂无评论

Polynomial-time hierarchy of computable reals

引用

Journal of Computational Information systems 2011年第4期7卷 1108-1115页

作者： Chen, Qingliang Su, Kaile Wu, Lijun Department of Computer Science Jinan University Guangzhou 510632 China Key Laboratory of Embedded System and Service Computing Ministry of Education Tongji University Shanghai China Key Laboratory of High Confidence Software Technologies Ministry of Education Peking University Beijing China Institute for Integrated and Intelligent Systems Griffith University Brisbane Australia School of Computer Science and Engineering University of Electronic Science and Technology Chengdu 610054 China

In mathematics, various representations of real numbers have been investigated and all these representations are proved to be mathematically equivalent. Furthermore, it is known that all effective versions of these representations lead to the same class of "computable real numbers". However, when subrecursive (such as primitive recursive) is taken into account, these representations can lead to different notions of "computable real numbers". This paper will look into the polynomial-time version of the problem for computable real numbers under different representations. We will summarize the known results to exhibit the comprehensive hierarchy they form. Our goal is to clarify systematically how the polynomial-time computability depends on the representations of the real numbers. Copyright © 2011 Binary Information Press.

关键词： Polynomial approximation

来源：评论

学校读者我要写书评

暂无评论

Looking around with your brain in a virtual world

Looking around with your brain in a virtual world

引用

IEEE Symposium on Computational Intelligence, Cognitive Algorithms, Mind, and Brain

作者： Bos, Danny Plass-Oude Duvinage, Matthieu Oktay, Oytun Saa, Jaime Delgado Guruler, Huseyin Istanbullu, Ayhan Van Vliet, Marijn Van De Laar, Bram Poel, Mannes Roijendijk, Linsey Tonin, Luca Bahramisharif, Ali Reuderink, Boris HMI Group Faculty of EEMCS University of Twente Netherlands TCTS Lab Electrical Engineering University Mons Belgium Electronics and Communications Corlu Engineering Namik Kemal University Turkey Faculty of Engineering and Natural Sciences VPA Lab Sabanci University Turkey IEE Group of Robotics and Intelligent Systems Universidad del Norte Colombia Department of Electronics and Computer Education Faculty of Technical Education Mugla University Turkey Faculty of Computer Engineering Balikesir University Turkey Radboud University Nijmegen Donders Institute for Brain Cognition and Behaviour Nijmegen Netherlands CNBI École Polytechnique Fédérale de Lausanne Switzerland Radboud University Nijmegen Institute for Computing and Information Sciences Nijmegen Netherlands

ISBN: (纸本)9781424498918

Offline analysis pipelines have been developed and evaluated for the detection of covert attention from electroen-cephalography recordings, and the detection of overt attention in terms of eye movement based on electrooculographic measurements. Some additional analysis were done in order to prepare the pipelines for use in a real-time system. This real-time system and a game application in which these pipelines are to be used were implemented. The game is set in a virtual environment where player is a wildlife photographer on an uninhabited island. Overt attention is used to adjust the angle of the first person camera, when the player is tracking animals. When making a photograph, the animal will flee when it notices it is looked at directly, so covert attention is required to get a good shot. Future work will entail user tests with this system to evaluate usability, user experience, and characteristics of the signals related to overt and covert attention when used in such an immersive environment. © 2011 IEEE.

关键词： Virtual reality

来源：评论

学校读者我要写书评

暂无评论

Consensus-Based Decentralized Supervision of Petri nets

Consensus-Based Decentralized Supervision of Petri nets

引用

IEEE Conference on Decision and Control

作者： Andrea Gasparri Donato Di Paola Alessandro Giua Giovanni Ulivi David Naso Department of Computer Science and Automation (DIA) University of "Roma Tre" 00146 Roma Italy Institute of Intelligent Systems for Automation (ISSIA) National Research Council (CNR) 70126 Bari Italy Department of of Electrical and Electronic Engineering (DIEE) University of Cagliari Italy Department of Electrical and Electronic Engineering (DEE) Polytechnic of Bari Bari Italy

ISBN: (纸本)9781612848006

In this work, by starting from the theoretical framework proposed in [1], the problem of decentralized supervision of a Petri net through collaboration among supervisors is addressed. Communication is assumed to be available but limited to one-hop neighbors, i.e., supervisors reachable from one another with respect to a certain communication radius r. A sufficient condition to achieve decentralized admissibility by focusing the attention on the communication topology of the network of supervisors is provided. Furthermore, under the assumption of control under concurrent firing, a protocol to reach an agreement on the control input among the supervisors is proposed. Finally, a feasibility analysis for the implementation of the proposed decentralized control framework is discussed.

关键词： Supervisors Petri nets control input Decentralized Communication Research Network topology

来源：评论

学校读者我要写书评

暂无评论

Wireless sensor network system for supporting nursing context-awareness

引用

International Journal of Autonomous and Adaptive Communications systems 2011年第4期4卷 361-382页

作者： Naya, Futoshi Ohmura, Ren Miyamae, Masakazu Noma, Haruo Kogure, Kiyoshi Imai, Michita NTT Communication Science Laboratories 2-4 Hikaridai Seika-cho Soraku-gun Kyoto 619-0237 Japan Department of Computer Science Toyohashi University of Technology 1-1 Hibari-ga-oka Tenpaku-cho Toyohashi Aichi 441-8580 Japan WESTUNITIS Co. Ltd. 3F Funakoshi Center Bldg. 2-4-6 Funakoshi-cho Chuo-ku Osaka 540-0036 Japan Intelligent Robotics and Communication Laboratories Advanced Telecommunications Research Institute International 2-2-2 Hikaridai Seika-cho Soraku-gun Kyoto 619-0288 Japan Department of Robotics Kanazawa Institute of Technology 3-1 Yatsukaho Hakusan Ishikawa 924-0838 Japan Department of Information and Computer Science Keio University 3-14-1 Hiyoshi Kohoku-ku Yokohama Kanagawa 223-8522 Japan

We developed a wireless sensor network system for supporting context-awareness of nursing activities in hospitals. Our system is aimed at automated recording of nursing work, providing context-aware services to nurses and visualising analytical results from nursing histories. The system consists of heterogeneous devices utilising three kinds of wireless networks: a ZigBeeTM (ZigBee is a registered trademark of the ZigBee Alliance)-based location sensor network, a BluetoothTM (Bluetooth is a trademark owned by Bluetooth SIG, Inc., USA)-based body-area sensor network for capturing nurse activities and a Wi-FiTM (Wi-Fi is a registered trademark of the Wi-Fi Alliance)-based network for communication between PDAs worn by nurses and a server PC. We illustrate the layered structure of the entire system as well as algorithms for estimating nurse locations and activities during their operations in a hospital. These estimated results are managed by a real-time database system with which nurse contexts can be visualised in real time on a server PC and/or PDAs. We also show empirical results evaluating the performance of retrieving, analysing and visualising detailed nursing contexts. Copyright © 2011 Inderscience Enterprises Ltd.

关键词： Wireless local area networks (WLAN)

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：