检索结果-内蒙古大学图书馆

作者： Wu, Jun Chen, Sheng Li, Gang Istepanian, Robert Habib Chu, Jian Whidborne, James F. National Lab. of Industrial Control Tech. Institute of Advanced Process Control Zhejiang University Hangzhou 310027 China Dep. of Electronics and Computer Sci. University of Southampton Highfield Southampton SO17 lBJ United Kingdom School of EEE Nanyang Technological University Singapore Dep. of Electrical and Computer Eng. Ryerson Polytechnic University Toronto ON M5B 2K3 Canada Department of Mechanical Engineering King's College London London WC2R 2LS United Kingdom

This paper present a new effective algorithm for the optimal realization of state estimate feedback controller structures for discrete time systems subject to finite-word-length constraints. The problem is formulated as a nonlinear programming to provide an easy and efficient optimization tool to solve such a complex problem. Simulation results of the optimum realizations of state estimate feedback controller structures are presented to illustrate the effectiveness of the proposed strategy. © 2000 American Automatic control Council.

关键词： Nonlinear programming

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computer-Aided Evaluation of Protein Expression in Pathological Tissue Images

Computer-Aided Evaluation of Protein Expression in Pathologi...

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Annual IEEE Symposium on computer-Based Medical Systems

作者： E. Ficarra E. Macii G. De Micheli L. Benini Politecnico di Torino Dep. of Control and Computer Engineering Torino Italy Ecole Polythecnique Federale de Lausanne (EPFL) Integrated Systems Laboratory (LSI) Lausanne Switzerland Dep. of Electronics University of Bologna Bologna Italy

This work presents the first fully-automated computer-aided analysis approach to the quantification of the expression of receptors for the non-small cell lung carcinoma. This immunohistochemical analysis is usually performed by pathologists via visual inspection of tissue samples images. Our techniques streamlines this error-prone and time-consuming process, thereby facilitating analysis and diagnosis. Experimental results on several real-life datasets demonstrate the high quantitative precision of our approach

关键词： Pathology Lungs Immune system Protein engineering Performance analysis Genetics Biomembranes Image analysis Monitoring Medical treatment

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Augmented reality to assist teleoperation working with reduced visual conditions

Augmented reality to assist teleoperation working with reduc...

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IEEE International Conference on Robotics and Automation (ICRA)

作者： A. Casals J. Fernandez J. Amat Dep. Automatic Control and Computer Engineering Universitat Politecnica de Catalunya Barcelona SPAIN Robotics Institute. (lRI) UPC/CSIC Barcelona SPAIN

Teleoperation in harsh environments has to tackle the problem of working with images of poor quality, as the visual feedback means for the human operator. This paper describes a procedure for image augmentation, based on the models of the scene elements, which are built from the images acquired in a previous phase, before the execution of the task, when the visual environment conditions are still good enough.

关键词： Augmented reality Layout Robots TV Optical sensors Optical feedback Automatic control control engineering computing Robotics and automation Operating systems

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RIIF-2: Toward the next generation reliability information interchange format

RIIF-2: Toward the next generation reliability information i...

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IEEE Symposium on On-Line Testing (IOLTS)

作者： A. Savino S. Di Carlo A. Vallero G. Politano D. Gizopoulos A. Evans Dep. of Control and Computer Engineering Politecnico di Torino Torino Italy Department of Informatics and Telecommunications University of Athens Athens Greece IROC Technologies Grenoble France

ISBN: (纸本)9781509015085

This paper describes the joint effort of the two FP7 EU projects CLERECO and MoRV toward the definition of an extended reliability information exchange format able to manage reliability information for the full system stack, from technology up to the software level. The paper starts from the RIIF language initiative, proposing a set of new features to improve the expression power of the language and to extend it to the software layer of a system. The proposed extended reliability information exchange format named RIIF-2 has the potential to support the development of next generation reliability analysis tools that will help to fully include reliability evaluation into an automated design flow, pushing cross-layer reliability considerations at the same level of importance as area, timing and power consumption when performing design exploration for new products.

关键词： Software reliability Reliability engineering Integrated circuit reliability Random access memory Software Hardware

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Real Time Scheduling Methods Requirements in Distributed control Systems

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IFAC Proceedings Volumes 2000年第7期33卷 95-102页

作者： Pau Martí Ricard Villà Josep M. Fuertes Gerhard Fohler Dep. of Automatic Control Universitat Politècnica de Catalunya Pau Gargallo 5 08028 Barcelona SPAIN Ph.: 34-3-4016971 Fax: 34-3-4017045 Dep. of Computer Engineering Mälardalen Högskola PO Box 883 SE-721 23 Västerås SWEDEN

Distributed control systems involve three main disciplines: control systems, real time systems, and communication systems. control systems, due their stringent timing constraints, demand real time computing technology. Distributed control systems need communication systems when distributing sensors, actuators, the control procedures and data messaging. In general, demands of distributed control systems and properties of real time scheduling algorithms differ, for example, for activation patterns of tasks. The aim of this paper is to provide a set of requirements to overcome current limitations of real time scheduling methods to their increase applicability for distributed control systems

关键词： Real-time systems Real-time tasks Scheduling algorithms Distributed computer control systems control applications Timing analysis

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Interactive Learning Module for control interaction understanding 10

Interactive Learning Module for control interaction understa...

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2009 10th European control Conference, ECC 2009

作者： Guzman, J.L. Astrom, K.J. Hagglund, T. Dormido, S. Berenguel, M. Piguet, Y. Automatics and Control Engineering Area Department of Computer Science University of Almería Almería04120 Spain Department of Automatic Control Lund University Box 118 LundSE-22100 Sweden Dep. Informática y Automática ETSI Informática UNED Madrid28040 Spain Calerga Sàrl 35 av. de la Chablière Lausanne1004 Switzerland

ISBN: (纸本)9783952417393

This paper describes an interactive tool focused on teaching and learning basic concepts on multivariable control systems. Most industrial processes are represented by multivariable systems and thus the teaching and learning of basic concepts on multivariable control is a key factor in control engineering education. In this sense, the interactive tool presented in this paper is aimed to introduce basic ideas on multivariable control systems mainly focused on interaction and pairing concepts. © 2009 EUCA.

关键词： Teaching

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DEXTERITY IMPROVEMENT IN TELEOPERATION THROUGH computer VISION BASED AUTOMATIC CORRECTION

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IFAC Proceedings Volumes 2002年第1期35卷 473-478页

作者： J. Amat A. Casals L. Muñoz M. las Heras Robotics Institute. (IRI) UPC / CSIC Llorens Artigas 4-6 2a pt. 08028 Barcelona SPAIN Dep. Automatic Control and Computer Engineering Universitat Politècnica de Catalunya

Robot manipulation through teleoperation requires some ability from a human operator. This requirement is stronger when the tridimensional scene is observed through a 2D monitor. This paper describes a telemanipulation aiding system based on the superposition of a position correction component to the manual orders given by the human operator, through his gestures. This correction will enable the slave arm to move quicker when it is far from the target, while moving slower and more precisely when it operates close to the target, thus, the system behaves as if an external attraction force appear around the possible objects to be manipulated.

关键词： Telerobotics Telemanipulation computer Vision Man-Machine Interface Stereo Vision

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Learning Based Model Predictive control for Quadcopters with Dual Gaussian Process

arXiv

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arXiv 2021年

作者： Liu, Yuhan Tóth, Roland The Harbin Institute of Technology Department of Control Science and Engineering Harbin China The Eindhoven University of Tech. Dep. of Electrical Eng. Control Systems Group Eindhoven Netherlands The Institute for Computer Science and Control Budapest Hungary

An important issue in quadcopter control is that an accurate dynamic model of the system is nonlinear, complex, and costly to obtain. This limits achievable control performance in practice. Gaussian process (GP) based estimation is an effective tool to learn unknown dynamics from input/output data. However, conventional GP-based control methods often ignore the computational cost associated with accumulating data during the operation of the system and how to handle forgetting in continuous adaption. In this paper, we present a novel Dual Gaussian Process (DGP) based model predictive control strategy that improves the performance of a quadcopter during trajectory tracking. The bio-inspired DGP structure is a combination of a long-term GP and a short-term GP, where the long-term GP is used to keep the learned knowledge in memory and the short-term GP is employed to rapidly compensate unknown dynamics during online operation. Furthermore, a novel recursive online update strategy for the short-term GP is proposed to successively improve the learnt model during online operation in an efficient way. Numerical simulations are used to demonstrate the effectiveness of the proposed strategy. © 2021, CC BY-NC-SA.

关键词： Model predictive control

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VoIP capacity estimation in mobile WiMAX networks

VoIP capacity estimation in mobile WiMAX networks

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National Conference on Radio Science (NSRC)

作者： Nawal A. El-fishawy Mohamed Zahra M. Ebrahi Mostafa M. El-gamala Computer and control Dep. Faculty of Electronic Eng. Elmenofia Uni. Menouf Egypt Communication Department Faculty of Engineering Al-Azhar University Cairo Egypt Comm. Dep. Faculty of Eng. AI-Azhar Uni Cairo Egypt Telecom Egypt Tanta Egypt

The IEEE 802.16 standard which has emerged as a broadband wireless access technology, promises to deliver high data rates over large areas to a large number of users in the near future. We present a simple analytical method for VoIP capacity estimation in IEEE 802.16e mobile WiMAX networks. Various overheads that impact the capacity are explained and methods to reduce these overheads are also presented. The analysis process helps explain various features of mobile WiMAX. It is shown that proper use of overhead reducing mechanisms and proper scheduling can make an order of magnitude difference in performance. The paper gives the maximum number of voice sessions using multiple VoIP codecs. Via simulation using ns2, the results of the analytical calculations will be validated using simple scheduler.

关键词： GSM OFDM Codecs

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Neuromorphic Sensors with Visible Light Communications 4

Neuromorphic Sensors with Visible Light Communications

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4th West Asian Symposium on Optical and Millimeter-Wave Wireless Communications, WASOWC 2022

作者： Hulea, Mircea Uleru, George-Iulian Younus, Othman Isam Rajbhandari, Sujan Ghassemlooy, Zabih Fac. of Automatic Control and Computer Engineering Gheorghe Asachi Technical University of Iasi Iasi Iasi Romania Optical Communications Research Group Northumbria University Dep. of Physics and Electrical Eng. Newcastle upon Tyne United Kingdom Dsp Centre of Excellence Bangor University Bangor United Kingdom Optical Communications Research Group Northumbria University Newcastle upon Tyne United Kingdom

ISBN: (纸本)9781665409131

Spiking neural networks (SNN) can control single-joint robotic arms' precise rotation and force when shape memory alloy (SMA) actuators are used. SNN receives feedback from neuromorphic sensors for controlling anthropomorphic fingers, which typically respond to the flexion angle and the force applied to the fingertips. The robotic fingers and hands are in relative motion with the robot's body, which typically includes the main unit for the limb's motion control. An elegant method to implement the connection between the main control unit and the neuromorphic sensors on limbs is to use visible light communication technology. This work presents a system that uses the recently introduced optical axons to connect the neuromorphic force sensors placed on fingers and the main electronic SNN that controls the finger's motion. The SNN behaviour is evaluated comparatively with and without optical axons when the hand moves relatively to the neural control unit (NCU), which regulates the finger's force. The expected results show that despite small oscillations of the finger force during steady-state, the robotic hand can hold on to an object while moving in the vicinity of NCU. © 2022 IEEE.

关键词： Robotic arms

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