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8th IFAC Conference on Fieldbuses and Networks in Industrial and Embedded Systems, FeT 2009

作者： Semprebom, Tiago Montez, Carlos Moraes, Ricardo Vasques, Francisco Portugal, Paulo Automation and Systems Department Federal University of Santa Catarina Florianopolis Brazil Computer Science Department UFSC Florianopolis Brazil UISPA/ISR Faculty of Engineering University of Porto Porto Portugal

ISBN: (纸本)9781617825583

The IEEE 802.15.4 standard offers a flexible communication solution for low-rate wireless small area networks. When the beacon mode is enabled, real-time communication is possible by using the Guaranteed Time Slots (GTS) mechanism. However, the beacon-enabled mode only supports a maximum of seven GTS allocated in each superframe, preventing other nodes to benefit from the guaranteed service. This paper introduces the SIGHT (Skips In GTS scHeduling for IEEE 802.15.4 neTworks) model, which incorporates a dynamic GTS allocation policy for IEEE 802.15.4 networks based on the (m,k)-firm task model. Our approach ensures that at least m messages are allocated in a guaranteed slot, for any k consecutive superframes. It adopts a deterministic schedulability test and an on-line prioritization heuristic algorithm called Slotted DBP (Distance Based Priority) to attend requests according to this schedulability model. A simulation model has been developed, in order to compare the behaviour in overload conditions of the proposed Slotted DBP with other approaches (DWCS and FIFO).

关键词： Real time systems

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Genetic algorithms for scenario generation in stochastic programming motivation and general framework

Genetic algorithms for scenario generation in stochastic pro...

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作者： Roupec, Jan Popela, Pavel Brno University of Technology Faculty of Mechanical Engineering Institute of Automation and Computer Science Technická 2 616 69 Brno Czech Republic Brno University of Technology Faculty of Mechanical Engineering Institute of Mathematics Technická 2 616 69 Brno Czech Republic

ISBN: (纸本)9781402089183

Traditional deterministic max-min and min-min techniques are significantly limited by the size of scenario set. Therefore, this text introduces a general framework how to generate and modify suitable scenario sets by using genetic algorithms. As an example, the search of absolute lower and upper bounds by using GA is presented and further enhancements are discussed. The proposed technique is implemented in C++ and GAMS and then tested on real-data examples. © Springer science+Business Media B.V. 2009.

关键词： Genetic algorithms

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Self-building simulation tool for daily decision support in production control

Self-building simulation tool for daily decision support in ...

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8th International Workshop on Modeling and Applied Simulation, MAS 2009, Held at the International Mediterranean and Latin American Modeling Multiconference, I3M 2009

作者： Pfeiffer, András Kádár, Botond Szathmári, Marcell Popovics, Gergely Vén, Zoltán Monostori, László Engineering and Management Intelligence Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences Kende u. 13-17 Budapest H-1111 Hungary Department of Manufacturing Science and Technology Faculty of Mechanical Engineering Budapest University of Technology and Economics Budapest Hungary

ISBN: (纸本)9781629934747

The paper introduces a decision support architecture with an integrated, self-building simulation module for the validation of the calculated manufacturing capacities, a-priori recognition of due date deviations and analysis of the effect of possible actions. In the underlying research special attention is devoted to the prediction and evaluation of the production on a daily, rolling time horizon basis (e.g., work in process (WIP) trajectories, machine utilizations). The paper addresses the simulation module of a higher level integrated system in which the simulation model is automatically built o the basis of a real-time connection to Manufacturing Execution System. The main functionalities and advantages are highlighted through a real industrial case study.

关键词： Production control

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Teaching research in the laboratory using diagnosis environment for digital systems

Teaching research in the laboratory using diagnosis environm...

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EAEEIE Annual Conference,

作者： Sergei Kostin Raimund Ubar Jaan Raik Margit Aarna Marina Brik H.-D. Wuttke Department of Computer Engineering Tallinn University of Technology Tallinn Estonia Faculty of Computer Science and Automation Ilmenau Technical University Ilmenau Germany

In this work, we propose a multifunctional e-learning environment with remote access for learning, getting hands-on experience, and carrying out laboratory research in developing optimized procedures for locating faults in complex electronic systems. It is a combination of a collection of software tools which simulate a system under diagnosis, emulate a pool of different strategies, methods, and algorithms of diagnostic reasoning and fault location, and allow to experiment with different embedded self-diagnosing architectures. Hands-on experiments target research teaching issues. The interactive character of the environment makes experiments attractive and helps to raise the students' curiosity.

关键词： Education Digital systems Fault diagnosis Circuit faults System testing Electronic learning Software tools Software algorithms Circuit testing Built-in self-test

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Test-Data Generation for Web Services Based on Contract Mutation

Test-Data Generation for Web Services Based on Contract Muta...

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2009 Third IEEE International Conference on Secure Integration and Reliability Improvement SSIRI 2009(第三届IEEE安全软件集成及可信性改进国际会议)

作者： Ying-Na Li Ying Jiang Shan-Shan Hou Lu Zhang Faculty of Information Engineering and Automation Kunming University of Science and Technology Kun Institute of Software School of Electronics Engineering and Computer Science Peking University Be Institute of Software School of Electronics Engineering and Computer Science Peking University Be

ISBN: (纸本)9780769537580

Software testing is one of the most important techniques used to assure the quality of Web Services at present. Test-data generation is an important topic in Web Services testing. The quality of test data will influence the efficiency and cost when testing Web Services. Based on the contract-based mutation testing technique, this paper presents a method of automated test-data generation for Web Services. First, according to the description information and contracts in WSDL documents of Web Services, initial test data are generated automatically by the random method. Then the test data are selected using contract mutation testing. This method can generate a test suite meeting a certain contract mutation score, which indicates the quality and efficiency of testing. Finally, we have developed a prototype on the *** platform, and carried out some experiments. The results have shown that the proposed method is effective in automated test-data generation for Web Services.

关键词： Web Service observational data contract data generation program testing

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The designing and simulation of passive filters used in urban transportation substations

The designing and simulation of passive filters used in urba...

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Eurocon

作者： Petre-Marian T. Nicolae Lucian N. Mandache Ileana-Diana V.D. Nicolae Department of Fundamental Electrical Engineering Faculty of Electrotechnics University of Craiova Romania Department of Software Engineering Faculty of Automation Computer Science and Electronics University of Craiova Romania

The paper presents the features of passive filters and some of the topologies used for the improving of power quality. One has in view aspects on the designing of passive filters tuned for some harmonic components. One presents some recordings and numerical simulations made over the electric signals from a substation used for the supplying of a d.c. line of 600 V. Based on the obtained results one proposes solutions for passive compensations with the consideration of a number of filtering components that depends on the compensation necessities. In order to verify the compensation efficiency, through SPICE simulation, one estimates the effects of compensation correlated with the number of passive filtering cells.

关键词： Passive filters Transportation Substations Power harmonic filters Filtering Frequency Resonance Impedance Band pass filters SPICE

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Dynamic GTS Scheduling of Periodic Skippable Slots in IEEE 802.15.4 Wireless Sensor Networks

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IFAC Proceedings Volumes 2009年第3期42卷 110-117页

作者： Tiago Semprebom Carlos Montez Ricardo Moraes Francisco Vasques Paulo Portugal Automation and Systems Department Federal University of Santa Catarina Florianopolis Brazil Computer Science Department UFSC Florianopolis Brazil UISPA/ISR Faculty of Engineering University of Porto Porto Portugal

关键词： IEEE 802.15.4 WLAN real-time systems (m,k)-firm scheduling QoS

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Redundancy method used in PLC related applications

Redundancy method used in PLC related applications

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International Workshop on Soft Computing Applications (SOFA)

作者： Gianina Gabor Doina Zmaranda Cornelia Gyorodi Sanda Dale Faculty of Electrical Engineering and Information Technology Department of Computer Science University of Oradea Oradea Romania Faculty of Electrical Engineering and Information Technology Department of Automation and Electrical Drives University of Oradea Oradea Romania

PLC related applications are more complex as far as more components are involved. If some error occurs, diagnosis can take some time, but a logical procedure will shorten the time needed to locate the fault. The probability of failure of different parts of typical PLC systems shows that 95% of PLC systems are external faults and occur on plant items such as: sensors, actuators, transducers, limit switchers, and others. The possibility of determining the validity of the data gathered from all transducers of the control system assures a way of short time fault detection. Consequently, a fault-tolerant control system must be implemented using redundant structures, representing an alternative for malfunctioning element detection. This paper presents a method used to design and implement a control system based on redundant structures. A case study for the geothermal power plant at the University of Oradea was developed. The redundant structure considered was simulated using MathLab/Simulink and analyzed using different scenarios. Finally, a possible implementation of resulting control system structure is done using a programmable logical controller (PLC).

关键词： Programmable control Control systems Transducers Fault detection Redundancy Fault diagnosis Sensor systems Actuators Fault tolerant systems Design methodology

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Research on Infrared Breath Alcohol Test Based on Differential Absorption

Research on Infrared Breath Alcohol Test Based on Differenti...

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International Conference on Information science and engineering (ICISE)

作者： Ren-wang Li Ye-pan Xiong Yong-jian Wang Fen Wan Faculty of Mechanical Engineering & Automation Zhejiang Science and Technology University Hangzhou Zhejiang China School of Computer Science and Technology North China Electric Power University Beijing China

ISBN: (纸本)9781424449095

An infrared alcohol testing system based on differential absorption is presented. The technique relies on the fact that the breath alcohol gas has a unique, well-defined absorption characteristic within the infrared region of electromagnetic spectrum. It is used to detect the present and concentration of alcohol gas. The non-dispersive infrared gas detection principle is introduced in detail. Experiments show that the testing system has high precision, good environment adaptability, and its indication error and repeatability reach the China National Standards.

关键词： Electromagnetic wave absorption Ethanol System testing Infrared spectra Automatic testing Infrared detectors Road accidents Fuel cells Real time systems Optical attenuators

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Noninvasive Continuous Blood Pressure Measurement and GPS Position Monitoring of Patients

Noninvasive Continuous Blood Pressure Measurement and GPS Po...

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IEEE Conference on Vehicular Technology (VTC)

作者： Ondrej Krejcar Zdenek Slanina Jan Stambachr Petr Silber Robert Frischer Department of Measurement and Control Faculty of Electrical Engineering and Computer Science Technical University of Ostrava Ostrava Czech Republic Department of Automation and Computing in Metallurgy Faculty of Metallurgy And Materials Engineering Technical University of Ostrava Ostrava Czech Republic

ISBN: (纸本)9781424425143

Need of blood pressure measurement is usable in wide spectrum of applications from physicians offices to home care applications. Many types of blood pressure measurement devices can be bought in electronics shops. All such devices are measurement devices which need to be in contact with human body (hand or foot mainly). Further they allow only one measurement per several minutes interval (typically 10 minutes). Our goal is to develop a small device for noninvasive continuous measurement of blood pressure. This device must be a small battery powered embedded system which measures a blood pressure during a long time period and sends this information to remote operator's stations. In this station the analysis of receiving video data is made for several types of usage. In current state we develop a small device to scan a video or a set of images with the NIR (Near Infra Red) CCD camera. The video data are transferred by wireless connection to the computer where they are analyzed. The first results provide an indication to be a right way to obtain exact continuous blood pressure information. In the future there exists a way to integrate this blood pressure measurement system to concurrently developed biotelemetric system architecture for patients and physicians called Guardian. For position monitoring in outdoor areas there is developed GPS module which informs about patient location and brings very precise time basis for other measuring modules of Guardian system and time synchronization.

关键词： Blood pressure Biomedical monitoring Position measurement Pressure measurement Global Positioning System Patient monitoring Battery charge measurement Time measurement Humans Foot

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