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检索条件"机构=Dept. of Automation and Computer Engineering"

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Time series classification for online tamil handwritten character recognition – A kernel based approach

引用

11th International Conference on Neural Information Processing, ICONIP 2004

作者： Sivaramakrishnan, K.R. Bhattacharyya, Chiranjib Dept. of Electrical Engineering Indian Institute of Science Bangalore India Dept. of Computer Science and Automation Indian Institute of Science Bangalore India

ISBN: (纸本)3540239316

In this paper, we consider the problem of time series classification. Using piecewise linear interpolation various novel kernels are obtained which can be used with Support vector machines for designing classifiers capable of deciding the class of a given time series. The approach is general and is applicable in many scenarios. We apply the method to the task of Online Tamil handwritten character recognition with promising results. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Time series

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Steel Defect Detection in Bridges Using Deep Encoder-Decoder Networks 13

Steel Defect Detection in Bridges Using Deep Encoder-Decoder...

引用

13th International Workshop on Structural Health Monitoring: Enabling Next-Generation SHM for Cyber-Physical Systems, IWSHM 2021

作者： Ahmed, Habib La, Hung Manh Advanced Robotics and Automation Laboratory Dept. of Computer Science and Engineering University of Nevada Reno RenoNV89527 United States

ISBN: (纸本)9781605956879

Recent major accidents related to bridges have emphasized the need for developing effective technological solutions for defect detection, which can minimize the possibility of bridge-related accidents in the future. In this respect, this research will focus towards development of automated system for the detection of defective regions within different steel parts of bridges. At present, there is no open-source image dataset, which can be used for this purpose. Consequently, the training dataset has been developed by using images acquired from bridges in Vietnam and validation was performed using images acquired from Lovelock bridge situated at Highway-80, Lovelock, NV, USA. A total of 5,500 (4,000 images for training and 1,500 for validation) images of different dimensions have been used the original dimensions of the steel bridge images have been modified 572 × 572 pixels, which have been used for the training and evaluation of the dataset on different Deep Encoder-Decoder networks. The use of diverse data from different bridges will allow the development of a robust Deep Encoder-Decoder network with considerable implications for practical systems in the future. This study will employ state-of-the-art Deep Encoder-Decoder network, which have been recently developed for other applications. However, no such study has been developed for defect detection in steel bridges. A comparative evaluation of different Deep Encoder-Decoder networks will be examined. At the same time, the performance of the system will be compared with recent advanced approaches. The results reveal the considerable potential of Deep Encoder-Decoder towards defect detection of steel bridges, which will be further exploited in the future studies. © 2021 Structural Health Monitoring 2021: Enabling Next-Generation SHM for Cyber-Physical Systems - Proceedings of the 13th International Workshop on Structural Health Monitoring, IWSHM 2021. All rights reserved.

关键词： Embedded systems

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A new H-bridge NNPC converter for 10kV class motor drives

A new H-bridge NNPC converter for 10kV class motor drives

引用

作者： Narimani, Mehdi Wu, Bin Tian, Kai Cheng, Zhongyuan Zargari, Navid Reza Dept. of Electrical and Computer Engineering Ryerson University TorontoON Canada Medium Voltage RandD Department Rockwell Automation CambridgeON Canada

ISBN: (纸本)9781479940325

This paper presents a new seven-level voltage source converter (VSC) for high-power medium-voltage (MV) motor drives. The proposed topology is composed of H-bridge connection of two nested neutral-point-clamped (NNPC) converters called 7L-HNNPC converter. This converter has interesting features such as operating over a wide-range of output voltages particularly for a range of (10kV-15kV) without the need for connecting power semiconductor in series, high quality output voltage, less number of components in compare to other classical seven-level topologies. A novel SPWM technique has been developed for the proposed 7L-HNNPC converter to control and balance of the flying capacitors. The outstanding property of the control strategy is that the control can be applied independently to each leg of the converter that reduces the complexity of the controller significantly. The performance of the proposed converter is studied under different operating conditions in the MATLAB/Simulink environment. The feasibility of the proposed converter is evaluated experimentally on a scale-down prototype. © 2014 IEEE.

关键词： Topology

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Modeling contextualized textual knowledge as a long-term working memory

Modeling contextualized textual knowledge as a long-term wor...

引用

18th European Symposium on Artificial Neural Networks, Computational Intelligence and Machine Learning, ESANN 2010

作者： Mazzieri, Mauro Topi, Sara Dragoni, Aldo Franco Vallesi, Germano Univiversità Politecnica delle Marche Dept. of Computer Management and Automation Engineering via Brecce Bianche 22 60100 Ancona Italy

ISBN: (纸本)2930307102

A knowledge management system is more than an archive of textual documents;it provides context information, allowing to know which documents where used by people with a common goal. In the hypothesis that a set of textual documents with a common context can be assimilated to the long term memory of a human expert executor, we can use on them mining techniques inspired by the mechanic of human comprehension in expert domains. Text mining techniques for KM task can use a model of the long-term memory to extract meaningful keywords from the documents. The model acts as a dynamic and non-stationary dimensionality reduction strategy, allowing the clustering of context documents according to keyword presence, the classification of external documents according to local criteria, and a better understanding of document content and relatedness.

关键词： Knowledge management

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Free form face recognition using kernel sparse representation 10

Free form face recognition using kernel sparse representatio...

引用

Proceedings of the Seventh Indian Conference on computer Vision, Graphics and Image Processing

作者： Anoop, K.R. Narasimhan, R.S. Ramakrishnan, K.R. Bhattacharya, Chiranjib Dept. of Electrical Engineering Indian Institute of Science Bangalore India Computer Science and Automation Indian Institute of Science Bangalore India

ISBN: (纸本)9781450300605

Recognizing faces from face detector outputs is a hard problem. While existing face recognition (FR) techniques essentially work on pre-processed (cropped and aligned) data, we employ Gabor-based covariance descriptors for recognition from free-form faces (raw face detector outputs). Our recognition algorithm employs a Principal Geodesic Analysis (PGA) of Covariance Descriptors, followed by a transformation on to tangent space where faces are sparsely represented. Employing the kernel trick on this sparse feature space enables upto 10% improvement in recognition accuracy. © 2010 ACM.

关键词： Face recognition

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Global adaptive robust servo mechanism of lower triangular systems via nonlinear internal model 6

Global adaptive robust servo mechanism of lower triangular s...

引用

6th IFAC Symposium on Nonlinear Control Systems, NOLCOS 2004

作者： Chen, Zhiyong Huang, Jie Dept. of Automation and Computer-Aided Engineering Chinese University of Hong Kong Shatin N. T. Hong Kong

The global robust servomechanistrl problem (alternatively, global robust output regulation problem) for lower triangular systems has been studied for two special cases. The first case assumes that the systems only contain polynomial nonlinearities, and the second case limits the exogenous signals and the unknown parameters to be within a known bounded set. This paper presents the solvability conditions of the global robust servomechanism problem for the lower triangular systems for the most general case where neither of the above two assumptions is needed. Copyright © 2004 IFAC.

关键词： Robust control

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Arithmetic Optimization Algorithm based Controller Design for Automatic Voltage Regulator System

Arithmetic Optimization Algorithm based Controller Design fo...

引用

2022 Innovations in Intelligent Systems and Applications Conference, ASYU 2022

作者： Izci, Davut Ekinci, Serdar Cetin, Haluk Batman University Dept. of Electronics & Automation Batman Turkey Batman University Dept. of Computer Engineering Batman Turkey Institute of Postgraduate Studies Batman University Batman Turkey

ISBN: (数字)9781665488945

ISBN: (纸本)9781665488945

The promise of a contemporary artificial intelligence optimization technique named arithmetic optimization algorithm is demonstrated in this work for automatic voltage regulator control. In this regard, a real proportional-integral-derivative (PID) plus second order derivative (PIDD2) controller is employed. The parameters of the real PIDD2 controller are tuned with the arithmetic optimization algorithm in order to reach a better control mechanism for the automatic voltage regulator. The performance index of integral of time squared error is used as an objective function for minimization. The results from the proposed method are compared with previously reported methods such as PIDD2 controller tuned with particle swarm optimization, fractional order PID controller tuned with slime mould algorithm, PID controller tuned with sine cosine algorithm and PID acceleration controller tuned with whale optimization algorithm. The time and frequency domain analyses confirm the more promising performance of reported method in this work for the AVR system compared to other available ones with good capability. © 2022 IEEE.

关键词： Controllers

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Improving the operation efficiency of supermedia enhanced internet based teleoperation via an overlay network

Improving the operation efficiency of supermedia enhanced in...

引用

2005 IEEE International Conference on Robotics and automation

作者： Cent, Zhiwei Goradia, Amit Mutka, Matt Xi, Ning Fung, Wai-Keung Liu, Yun-Hui Dept. of Computer Science and Engineering Michigan State University East Lansing MI 48824 United States Dept. of Electrical and Computer Engineering Michigan State University East Lansing MI 48824 United States Dept. of Automation and Computer Aided Engineering Chinese University of Hong Kong Shatim N.T. Hong Kong

ISBN: (纸本)078038914X

For Internet based real-time teleoperation systems, random time delay can cause instability in the closed loop control system and hence hinder task accomplishment. Event based control systems have been proposed to overcome the instability caused by the random time delay. High latency at the transport layer can still impede effective and reliable execution of tasks with high dexterity requirements. Network QoS based dynamic resource allocation has been proposed to increase the efficiency and reliability of task execution. However, these approaches only try to mitigate or overcome the effects of random time delay and do not address the cause of latency issues in the communication channel. This paper addresses the efficiency and reliability requirements for supermedia enhanced teleoperated systems by reducing the end-to-end transmission latency through the use of overlay networks. The proposed system reduces the transmission latency by using multiple, disjoint paths in overlay networks. The proposed system facilitates reliable and efficient task completion for tasks with high dexterity requirements. Experimental validation of the proposed teleoperated system using the PlanetLab Network is provided for the task of teleoperating a mobile manipulator system. © 2005 IEEE.

关键词： Internet

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引用

2004 International Conference on Image Processing, ICIP 2004

作者： Ramanathan, Narayanan Chellappa, Rama Roy Chowdhury, Amit K. Center for Automation Research Dept. of Electrical and Computer Engineering University of Maryland College Park MD 20742 United States Dept. of Electrical Engineering University of California Riverside CA 92521 United States

ISBN: (纸本)0780385543

Illumination, pose variations, disguises, aging effects and expression variations are some of the key factors that affect the performance of face recognition systems. Face recognition systems have always been studied from a recognition perspective. Our emphasis is on deriving a measure of similarity between faces. The similarity measure provides insights into the role each of the above mentioned variations play in affecting the performance of face recognition systems. In the process of computing the similarity measure between faces, we suggest a framework to compensate for pose variations and introduce the notion of 'Half-faces' to circumvent the problem of non-uniform illumination. We used the similarity measure to retrieve similar faces from a database containing multiple images of individuals. Moreover, we devised experiments to study the effect age plays in affecting facial similarity. In conclusion, the similarity measure helps in studying the significance facial features play in affecting the performance of face recognition systems. ©2004 IEEE.

关键词： Face recognition

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Synthesis of robust PID controllers design with complete information on pre-specifications for the FOPTD systems

Synthesis of robust PID controllers design with complete inf...

引用

作者： Luo, Ying Chen, YangQuan Dept. of Automation Science and Engineering South China University of Technology Guangzhou China Dept. of Electrical and Computer Engineering Utah State University Logan UT United States Dept. of Electrical and Computer Engineering Utah State University Logan UT United States

ISBN: (纸本)9781457700804

This paper provides a new design synthesis for the stable PID controllers to achieve the robustness to the system gain variations based on the first order plus time delay (FOPTD) systems. This designed PID controller is robust not only to the uncertainty of the plant steady-state gain, but also to the entire variations of the controller coefficients. The stability regions of the PID controller parameters are first determined according to a graphical stability criterion. According to two pre-specifications and the flat phase tuning constraint, a specific point in the three-dimension PID parameter-space can be determined. This designed PID controller can be, stable for sure as its parameter point is located in the stability region, and also robust to system gain variations according to the flat phase constraint. The important contribution of this proposed design synthesis is that, it provides the reliable procedures of designing the stable PID controller with robustness to the system gain variations, moreover, it can collect the complete information of the achievable design pre-specifications, which is the significant principle problem for the PID controllers synthesis in this paper. © 2011 AACC American Automatic Control Council.

关键词： Three term control systems

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