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25th IEEE International Conference on Advanced Information Networking and Applications Workshops, WAINA 2011

作者： Gilesh, M.P. Hansdah, R.C. Dept. of Computer Science and Engineering Government Engineering College Wayanad Kerala India Dept. of Computer Science and Automation Indian Institute of Science Bangalore India

ISBN: (纸本)9780769543383

There are many wireless sensor network(WSN) applications which require reliable data transfer between the nodes. Several techniques including link level retransmission, error correction methods and hybrid Automatic Repeat re- Quest(ARQ) were introduced into the wireless sensor networks for ensuring reliability. In this paper, we use Automatic resend request(ASQ) technique with regular acknowledgement to design reliable end-to-end communication protocol, called Adaptive Reliable Transport(ARTP) protocol, for WSNs. Besides ensuring reliability, objective of ARTP protocol is to ensure message stream FIFO at the receiver side instead of the byte stream FIFO used in TCP/IP protocol suite. To realize this objective, a new protocol stack has been used in the ARTP protocol. The ARTP protocol saves energy without affecting the throughput by sending three different types of acknowledgements, viz. ACK, NACK and FNACK with semantics different from that existing in the literature currently and adapting to the network conditions. Additionally, the protocol controls flow based on the receiver's feedback and congestion by holding ACK messages. To the best of our knowledge, there has been little or no attempt to build a receiver controlled regularly acknowledged reliable communication protocol. We have carried out extensive simulation studies of our protocol using Castalia simulator, and the study shows that our protocol performs better than related protocols in wireless/wire line networks, in terms of throughput and energy efficiency. © 2011 IEEE.

关键词： Reliability

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Fabrication Processes and Experimental Validation of a Planar PV Power System with Monolithically Embedded Power Converters

Fabrication Processes and Experimental Validation of a Plana...

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IEEE Energy Conversion Congress and Exposition

作者： Abusaleh M. Imtiaz Faisal H. Khan Power Electronics and Automation Research Lab (PEARL) Dept. of Electrical and Computer Engineering Univ. of Utah Salt Lake City USA

ISBN: (纸本)9781467308021

This paper summarizes the research outcome intended to identify the most suitable device architecture and its implementation for cell-level power conversion in a photovoltaic (PV) system. The fabrication process to accommodate the power conditioning unit with the PV cells using the same process run have been presented in this paper. Using this method, the entire converter can be embedded with the PV cells producing AC power directly from the solar cell strings. The initial phase of this project simulated various circuit components in the CMOS process, and the project outcome has been summarized in a previous publication by the authors. This paper presents the experimental results of the proposed process, and a simple chopper circuit has been constructed using the embedded MOSFETs and the PV cells. The circuit has been experimentally characterized, along with components. In addition to the process-related challenges and issues, this paper explains the justification of this integration by achieving higher reliability, portability and complete modular construction for PV-based energy harvesting units. To the knowledge of the authors, no attempt has been made to fabricate power converter components with PV cells in the same process run.

关键词： the research outcome the most the CMOS process

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Torque Improvement of Three-phases Full Bridge Converter based Switched Reluctance Motor with DC Assisted Winding

Torque Improvement of Three-phases Full Bridge Converter bas...

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International Conference on Electrical Machines and Systems

作者： K. Tungpimolrut S. Kachapornkul P. Jitkreeyarn P. Somsiri N. Chayopitak C. Akira Advanced Automation and Electronics Research Unit National Electronics and Computer Technology Center Dept. of Electrical and Electronics Engineering Tokyo Institute of Technology

ISBN: (纸本)9781467323277

In this paper a torque capacity improvement method for the three-phase full bridge converter based switched reluctance motor (SRM) drive is investigated. The concept of DC assisted winding operated with ordinary bipolar AC winding for the conventional two-phase excitation is applied and compared to the previously proposed two-phase excitation drive system. The optimal switching angle and amplitude of the current in DC winding are identified. The improvement on torque versus speed characteristic curve of tested machine, 1.5 kW, 3-phase, 6-stator-pole and 4-rotor-pole SRM is verified by the experimental results.

关键词： Switched Reluctance Motors Three-phase full bridge converter Two-phase excitation Torque capacity

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Design of adaptive fuzzy logic controller for LED driving circuit

Design of adaptive fuzzy logic controller for LED driving ci...

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2011 International Conference on Electric Information and Control engineering, ICEICE 2011

作者： Peng, Yan Li, Xiaohan He, Huaping Dept. of Computer Science Sichuan University of Science and Engineering Zigong China Dept. of Automation and Electronic-information Sichuan University of Science and Engineering Zigong China

ISBN: (纸本)9781424480395

DC-DC booster converter in PWM switch mode is used for high power white LED. Electromagnetic interference, load disturbance, etc existing in circuits make their analysis and control difficult. Because of this, on the basis of tradition PI controller an adaptive fuzzy logic controller is designed to adjust real time PI parameter through introducing two correction factors. The controller is then obtained through innovative search. The simulation results show that the Controller does not only make driving circuit have stronger response ability, but also effectively depress the overshoot. © 2011 IEEE.

关键词： Controllers

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Using an affective attention focus for improving the reasoning process and behavior of intelligent agents

Using an affective attention focus for improving the reasoni...

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2011 IEEE/WIC/ACM International Conference on Intelligent Agent Technology, IAT 2011

作者： Signoretti, Alberto Feitosa, Antonino Campos, Andre M. Canuto, Anne M. Xavier-Junior, João C. Fialho, Sergio V. Computer Science Dept. - di UERN Natal-RN Brazil Computer Science and Applied Mathematics Dept.- DIMAp UFRN Natal-RN Brazil Automation and Computer Engineering Dept. - DCA UFRN Natal-RN Brazil

ISBN: (纸本)9780769545134

Simulations based on cognitively rich agents can become a very intensive computing task, especially when the simulated world represents a complex system. Those simulations can however benefit from optimizations coming from the way in which agents react to changes in the simulated environment. This paper presents an approach for improving the efficiency of the decision-making process of autonomous agents in a simulation. The optimization is reached by dynamically adapting the agent's perception to a bounded subset of all the agent's surrounding elements, which contains only the most important elements for the agent at the current time. In other words, the agent is modeled as having a dynamic focus of attention. © 2011 IEEE.

关键词： Autonomous agents

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Determining biochemical reaction network structures for kinetic polynomial models with uncertain coefficients

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AIP Conference Proceedings 2012年第1期1479卷 2427-2430页

作者： Gábor Szederkényi Z. A. Tuza Katalin M. Hangos Process Control Research Group Computer and Automation Research Institute Hungarian Academy of Sciences. Kende u. 13-17 H-1111 Budapest Hungary and Faculty of Information Technology Pázm Hungary Faculty of Information Technology Pázmány Péter Catholic University Práter u. 50/a H-1083 Budapest Hungary Process Control Research Group Computer and Automation Research Institute Hungarian Academy of Sciences. Kende u. 13-17 H-1111 Budapest Hungary and Dept. of Electrical Engineering and Informatio Hungary

A numerical method is proposed in this paper for the computation of dense and sparse reaction network structures for kinetic polynomial models with uncertain parameters represented as intervals. The problem is traced ...

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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...

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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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Latent fingerprint enhancement via robust orientation field estimation

Latent fingerprint enhancement via robust orientation field ...

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2011 International Joint Conference on Biometrics, IJCB 2011

作者： Yoon, Soweon Feng, Jianjiang Jain, Anil K. Dept. of Computer Science and Engineering Michigan State University United States Dept. of Automation Tsinghua University Beijing China Dept. of Brain and Cognitive Engineering Korea University Anam-dong Seongbuk-gu Seoul 136-713 Korea Republic of

ISBN: (纸本)9781457713583

Latent fingerprints, or simply latents, have been considered as cardinal evidence for identifying and convicting criminals. The amount of information available for identification from latents is often limited due to their poor quality, unclear ridge structure and occlusion with complex background or even other latent prints. We propose a latent fingerprint enhancement algorithm, which expects manually marked region of interest (ROI) and singular points. The core of the proposed algorithm is a robust orientation field estimation algorithm for latents. Short-time Fourier transform is used to obtain multiple orientation elements in each image block. This is followed by a hypothesize-and-test paradigm based on randomized RANSAC, which generates a set of hypothesized orientation fields. Experimental results on NIST SD27 latent fingerprint database show that the matching performance of a commercial matcher is significantly improved by utilizing the enhanced latent fingerprints produced by the proposed algorithm. © 2011 IEEE.

关键词： Image segmentation

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Latent fingerprint matching using descriptor-based hough transform

Latent fingerprint matching using descriptor-based hough tra...

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2011 International Joint Conference on Biometrics, IJCB 2011

作者： Paulino, Alessandra A. Feng, Jianjiang Jain, Anil K. Dept. of Computer Science and Engineering Michigan State University East Lansing MI United States Dept. of Automation Tsinghua University Beijing China Dept. of Brain and Cognitive Engineering Korea University Anam-dong. Seongbuk-gu. Seoul 136-713 Korea Republic of

ISBN: (纸本)9781457713583

Identifying suspects based on impressions of fingers lifted from crime scenes (latent prints) is extremely important to law enforcement agencies. Latents are usually partial fingerprints with small area, contain nonlinear distortion, and are usually smudgy and blurred. Due to some of these characteristics, they have a significantly smaller number of minutiae points (one of the most important features in fingerprint matching) and therefore it can be extremely difficult to automatically match latents to plain or rolled fingerprints that are stored in law enforcement databases. Our goal is to develop a latent matching algorithm that uses only minutiae information. The proposed approach consists of following three modules: (i) align two sets of minutiae by using a descriptor-based Hough Transform;(ii) establish the correspondences between minutiae;and (iii) compute a similarity score. Experimental results on NIST SD27 show that the proposed algorithm outperforms a commercial fingerprint matcher. © 2011 IEEE.

关键词： Hough transforms

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Research on flue gas on-line monitoring system for Thermal Power Plant

Research on flue gas on-line monitoring system for Thermal P...

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作者： Wang, Jing Hou, Jie Dept. of Computer Application Chongqing College of Electronic Engineering Chongqing 401331 China College of Automation Chongqing University Chongqing 400044 China

ISBN: (纸本)9789881725592

Aimed at emission of a huge amount of sulfur dioxide during making thermal process and resulted in major air pollution sources, the paper designed a sort of flue gas online monitoring system for thermal power plant. Based on B/S architecture, the professional platform of SCADA, GIS and AERMOD is respectively built, and the system layers are separated and integrated by means *** platform. And data communications are realized by a new Web Service switch fabric. Also in the paper, the functional demand and typical module were briefly introduced, and the Ajax, XML and other techniques are applied in the process of system realization. The actual test displays that the operational data of flue gas desulphurization online monitoring system could be easily obtained. The running effect shows that it can make the remote monitoring and online analysis for flue gas desulphurization system emission targets. © 2011 Chinese Assoc of Automati.

关键词： Flue gases

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