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2013 NASA/ESA Conference on Adaptive Hardware and Systems, AHS 2013

作者： Muñoz, Daniel M. Llanos, Carlos H. Dos Santos Coelho, Leandro Ayala-Rincón, Mauricio Electronics Engineering Graduate Program Faculty of Gama University of Brasilia Brasilia DF Brazil Department of Mechanical Engineering Automation and Control Group/GRACO University of Brasilia Brasilia DF Brazil Industrial and Systems Engineering Graduate Program LAS/PPGEPS Pontifical Catholic University of Parana Curitiba Parana Brazil Departments of Computer Science and Mathematics University of Brasilia Brasilia DF Brazil

ISBN: (纸本)9781467363839

The firefly algorithm (FA) is a new population-based metaheuristic bioinspired on the behavior of the flashing characteristics of fireflies. As a population-based algorithm, the FA suffers from large execution times specifically for embedded optimization problems with computational limitations. For reducing execution times we propose a hardware parallel architecture of the FA algorithm that facilitates the implementation in Field Programmable Gate Arrays (FPGAs). In addition, this work proposes the application of the opposition-based learning (OBL) approach to the FA algorithm. The respective hardware implementation (HPOFA) was mapped into a Virtex5 FPGA device and numerical experiments using four well-known benchmark problems demonstrate that the opposition-based approach allows the FA algorithm to improve its functionality, preserving the swarm diversity and avoiding the premature convergence problem. Synthesis results point out that the HPOFA architecture is effectively mapped in hardware and is suitable for embedded applications. © 2013 IEEE.

关键词： Parallel architectures

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Application of PID retuning method for laboratory feedback control system incorporating FO dynamics

Application of PID retuning method for laboratory feedback c...

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International Carpathian control Conference (ICCC)

作者： L'ubomír Dorčák Emmanuel Gonzalez Ján Terpák Ivo Petráš Juraj Valsa Monika Žecová Institute of Control and Informatization of Production Processes Faculty BERG Technical University of Košice Kosice Slovakia Center for Automation Research College of Computer Studies De La Salle University Manila Philippines Faculty of Electrical Engineering and Computer Science Brno University of Technology Brno Czech Republic

Real objects in general are fractional-order (FO) systems, although in some types of systems the order is very close to integer order (IO). Since major advances have been made in the theory and practice of the identification of FO controlled objects and in the design of FO controllers, it is possible to consider also the real order of the dynamical systems and consider more quality criterion while designing the FO controllers with more degrees of freedom compared to their IO counterparts. In this paper, we present an application of the retuning method to design and apply new FO controller for the existing laboratory feedback control system with no modifications in the internal architecture of the original feedback control system. Along with the mathematical description, presented are also simulation results.

关键词： Closed loop systems Feedback control Mathematical model Laboratories Educational institutions PD control

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Displacement prediction of landslide based on PSOGSA-ELM with mixed kernel

Displacement prediction of landslide based on PSOGSA-ELM wit...

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International Workshop on Advanced Computational Intelligence (IWACI)

作者： Cheng Lian Zhigang Zeng Wei Yao Huiming Tang School of Automation Key Laboratory of Image Processing and Intelligent Control of Education Ministry China School of Computer Science South-Central University for Nationalities Wuhan China Faculty of Engineering China University of Geosciences Wuhan China

The prediction of landslide displacement is essential for carrying out to improve the disaster warning system and reduce casualties and property losses. This study applies a novel neural network technique, extreme learning machine (ELM) with kernel function, to landslide displacement prediction problem. However, the generalization performance of ELM with kernel function depends closely on the kernel types and the kernel parameters. In this paper, we use a convex combination of Gaussian kernel function and polynomial kernel function in ELM, which may use these two types of kernel functions' advantages. In order to avoid blindness and inaccuracy in parameter selection, a novel hybrid optimization algorithm based on the combination of Particle Swarm Optimization (PSO) and Gravitational Search Algorithm (GSA) is used to optimize the regularization parameter C, the Gaussian kernel parameter γ, the polynomial kernel parameter q and the mixing weight coefficient η. The performance of our model is verified through two case studies in Baishuihe landslide and Yuhuangge landslide.

关键词： Kernel Terrain factors Optimization Hazards Reservoirs Training Support vector machines

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Clock Synchronization for Wireless Sensor Network with Communication Delay

Clock Synchronization for Wireless Sensor Network with Commu...

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American control Conference

作者： Emanuele Garone Andrea Gasparri Francesco Lamonaca Faculty of Applied Science Control and Systems Analysis Department Université Libre de Bruxelles 1050 Brussels Belgium Department of Computer Science and Automation University of "Roma Tre" Via della Vasca Navale 79 00146 Rome Italy Dept. of Electronic Systems and Computer Science University of Calabria Ponte Pietro Bucci 87040 Rende (CS)

ISBN: (纸本)9781479901777

In this work, the clock synchronization problem for wireless sensor networks is addressed. In our scenario, we consider a wireless sensor network where nodes are equipped with a local clock hardware and communicate in order to achieve a common sense of time. This work introduces a novel synchronization algorithm able to ensure a good level of synchronization even in the presence of random bounded communication delays. A theoretical analysis of the robustness of the proposed algorithm is proposed along with simulations to corroborate the theoretical finding.

关键词： Communication Delay clock synchronization theoretical finding

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Personalized therapy selection by using multi-objective optimization

Personalized therapy selection by using multi-objective opti...

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IEEE 16th International Conference on Intelligent Engineering Systems, INES 2012

作者： Karpics, Ivars Institute of Computer Control Automation and Computer Engineering Faculty of Computer Science and Information Technology Riga Technical University Riga Latvia

ISBN: (纸本)9781467326957

In the article a therapy selection method by using topological modelling and multi- objective optimization is presented. In a medicine practice a doctor by taking into the count patients' health state and laboratory results, tries to suggest a treatment strategy, which mostly is a drug therapy. To solve this task a decision support system has been developed and proposed. The system includes a mathematical model of three self connected diseases. Therapies are evaluated by five efficiency objectives. To find the optimal therapy, seven multi- objective methods are selected and used. Optimization methods form decision support module which is implemented in the medical computer system. To evaluate a performance of the system, test examples are analysed. Conclusion includes the summary and proposals of further research. © 2012 IEEE.

关键词： Multiobjective optimization

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Personalized therapy selection by using multi-objective optimization

Personalized therapy selection by using multi-objective opti...

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IEEE International Conference on Intelligent Engineering Systems (INES)

作者： Ivars Karpics Institute of computer control automation and computer engineering Faculty of computer science and information technology Riga Technical University Riga Latvia

关键词： Mathematical model Drugs Optimization methods computers

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A simplified mathematical model of the cryogenic distillation with application to the (13C) isotope separation column

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AIP Conference Proceedings 2012年第1期1425卷 189-192页

作者： A. O. Neaga C. Festila E. H. Dulf R. Both T. Szelitzky M. Gligan Technical University of Cluj Napoca Department of Automatic Control Faculty of Automation and Computer Science 28 Memorandumului 400114 Cluj Napoca Romania

The isotope (13C) has a widespread application in many fields such as chemistry, physics, medicine, etc. To obtain a high concentration in isotope of interest, in our case (13C), it is used the method of cryogenic distillation of carbon monoxide (CO) which is based on the difference between the vapor pressure of (12C16O) and (13C16O) at the temperature of liquid nitrogen. Isotopic separation plant, used to obtain the isotope (13C), is a complex installation, with many inputs and outputs, rather difficult to control. Due to this reason, from the point of view of automation, it is needed a simplified mathematical model. This model can be determined only with some presumption and simplification assumptions. Using the physical laws, the hydrodynamic part of the process and the mass balance will be described by partial differential equations. In order to design a controller for the column, it is needed a transfer function or a statespace realization of the plant, which is the main contribution of the present work. Implementing this mathematical model will be the key element for describing and understanding the operation of the plant and for future development of process control strategies.

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An introduction to the special issue on time delay systems: Modelling, identification, stability, control and applications

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WSEAS Transactions on Systems 2012年第10期11卷 539-540页

作者： Pekař, Libor Neri, Filippo Department of Automation and Control Engineering Faculty of Applied Informatics Tomas Bata University in Zlín Zlín Czech Republic Department of Computer Science University of Naples Federico II Naples Italy

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Composition of united multiple diseases evolution topological model

Composition of united multiple diseases evolution topologica...

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9th International Symposium on Intelligent Systems and Informatics, SISY 2011

作者： Karpičs, I. Markovičs, Z. Markoviča, I. Institute of Computer Control Automation and Computer Engineering Faculty of Computer Science and Information Technology Riga Technical University Riga Latvia

ISBN: (纸本)9781457719745

Mathematical models are constructed and used as a methodology of various functioning systems structure investigation and performance analysis. The main goal of mathematical model usage is to perform wholesome diagnostics and correct work resumption of investigated system. In the article topological modeling method has been investigated by giving fundamental basics and application spheres by examples. Authors propose model construction method with an example from medicine by creating multiple diseases (arterial hypertension, atherosclerosis and diabetes mellitus) evolution topological model with formal aspects. Developed modeling method and united diseases model can be used to prognosticate evolution of diseases, perform inspection of used therapies and provide information for optimal therapy complex selection. © 2011 IEEE.

关键词： Topology

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Design methods of multithreaded architectures for multicore microcontrollers

Design methods of multithreaded architectures for multicore ...

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6th IEEE International Symposium on Applied Computational Intelligence and Informatics, SACI 2011

作者： Caprita, Horia V. Popa, Mircea Lucian Blaga University of Sibiu Computer Science and Automatic Control Department Sibiu Romania Politehnica University of Timisoara Faculty of Automation and Computers Timisoara Romania

ISBN: (纸本)9781424491094

The development of electronic technology today has allowed the implementation of complex architectures, which led to the emergence of multicore processors technology. Multicore architectures are built from superscalar and multithreaded processors. Integrating new technologies in embedded applications requires the development of multicore processors that can be integrated into a smaller area like a classic microcontroller. These processors must manage fewer resources and be able to manage multiple tasks simultaneously. In this paper we present a method of modeling, simulation and evaluation of two multithreaded architectures with limited resources, which could be integrated into embedded systems: Interleaved multithreading (IMT) and Blocked multithreading (BMT). Both techniques permit the processing of multiple independent threads, concurrently. In this paper we propose a SimpleScalar Interleaved Multithreading architecture (SS-IMT) and a SimpleScalar Blocked Multithreading architecture (SS-BMT) that are derived from SimpleScalar simulator. We will evaluate the performances of these architectures compared to the performance of standard SimpleScalar architecture. © 2011 IEEE.

关键词： Microcontrollers

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