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2013 2nd International Conference on Advances in computer science and Engineering(CSE 2013)

作者： Marcin Sidzina Andrzej Kwiecień Jacek Stój Faculty of Mechanical Engineering and Computer Science University of Bielsko-Bia?a Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology

The distributed computer systems applied in industry are usually of the real-time type. In those systems the maximal system response time has to be always well known in order to ensure the functional as well as the safety parameters of the system. However, the system response time may be subject to change as a result of system development during its life cycle. As the given system grows, the response time lengthens. So it happens that in order to satisfy the real-time constraints, the response time T RES has to be reduced after the system development. One of the factors that have an influence on the T RES time, is the automata cycle of the communication system nodes. The shorter the automata cycle is, the more frequent is the data exchange between the CPU module and the communication module of the given system node, which improves the T RES value. However, having the node's application well implemented, shortening of the automata cycle may seldom be done by the application optimization. Then, the only solution would be to temporary shorten the automata cycle by execution of some of the most crucial parts of the user application. In this paper, a method for shortening the automata cycle is described.

关键词： automata cycle events avalanche events burst communication network distributed real-time system programmable logic controller PLC real-time temporal determinism

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Image vectorization on modern architectures

Image vectorization on modern architectures

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IEEE International Conference on Intelligent computer Communication and Processing

作者： Emil Slusanschi Grigore Lupescu Computer Science and Engineering Departament Faculty of Automatic Control and Computers University "Politehnica" of Bucharest

ISBN: (纸本)9781479914920

This work presents an image vectorization application aimed to exploit features found in most of today's modern architectures. Design decisions supported by performance results are presented along with use cases for the proposed solution. We will present the algorithm, the target architectures and threading models, as well as a number of optimization techniques. Finally results of both low power SoC and high performance multicore processors are discussed.

关键词： Vectorization Heterogeneous Manycore Imaging Parallelism Multicore

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Implementation of an inexpensive EEG headset for the pattern recognition purpose

Implementation of an inexpensive EEG headset for the pattern...

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2013 IEEE 7th International Conference on Intelligent Data Acquisition and Advanced Computing Systems, IDAACS 2013

作者： Kawala-Janik, Aleksandra Podpora, Michal Pelc, Mariusz Piatek, Pawel Baranowski, Jerzy University of Greenwich School of Computing and Mathematical Sciences London United Kingdom Opole University of Technology Faculty of Electrical Engineering Automatic Control and Informaics Opole Poland AGH University of Science and Technology Faculty of Electrical Engineering Automatics Computer Science and Biomedical Engineering Krakow Poland

ISBN: (纸本)9781479914265

There are many types of bio-signals with various control application prospects. In this work possible control application domain of electroencephalographic signal obtained from an easily available, inexpensive EEG headset - Emotiv EPOC was presented. This work also involved application of an embedded system platform. That solution caused limits in choosing an appropriate signal processing method, as embedded platforms characterise with a little efficiency and low computing power. Potential implementation of the embedded platform enables to extend the possible future application of the proposed BCI. It also gives more flexibility, as the platform is able to simulate various environments. In this work traditional, statistical methods were neither used nor described. © 2013 IEEE.

关键词： Brain computer interface

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BUILT IN PERFORMANCE EVALUATION FOR AN ADAPTIVE NOTCH FILTER

BUILT IN PERFORMANCE EVALUATION FOR AN ADAPTIVE NOTCH FILTER

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European Signal Processing Conference

作者： Michal Meler Maciej Niedzwiecki Department of Automatic Control Gdansk University of Technology Faculty of Electronics Telecommunications and Computer Science

The problem of estimating instantaneous frequency of a nonstationary complex sinusoid (cisoid) buried in wideband noise is considered. The proposed approach extends adaptive notch filtering algorithm with a nontrivial performance assessment mechanism which can be used to optimize frequency tracking performance of the adaptive filter. Simulation results confirm that the proposed extension allows one to improve accuracy of frequency estimates considerably, especially in nonstationary conditions.

关键词： Frequency estimation Adaptive notch filtering

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Retrospective Vision of a Long Term Innovative Experience

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Procedia - Social and Behavioral sciences 2014年 141卷 15-19页

作者： Jose Manuel Lopez-Guede Manuel Graña Fernando Oterino Jesus Maria Larrañaga Department of Systems Engineering and Automatic Control University College of Engineering of Vitoria Basque Country University (UPV/EHU) Vitoria 01006 Spain Department of Computer Science and Artificial Intelligence Faculty of Informatics Basque Country University (UPV/EHU) San Sebastian 20018 Spain Department of Electronics University College of Engineering of Vitoria Basque Country University (UPV/EHU) Vitoria 01006 Spain Department of Business Management University College of Engineering of Vitoria Basque Country University (UPV/EHU) Vitoria 01006 Spain

The purpose of this paper is to look back on a long term informal innovative experience carried out during the last nine years until the present one, and try to discern, with a retrospective and a long time vision, whether it has been as beneficial as expected once it has concluded. This experience has taken place in the University College of Engineering of Vitoria (Basque Country University, Spain) since the year 2.004, and it has been accomplished in the subject Company Networks of Technical Engineering in Management Computing. After the analysis of a number of data collected along these years, we found that we have reached the initial objective of increasing the enrolment in the subject that has driven the project, and other unexpected ones that are more important from a long time point of view. Once that nine years have lapsed and the project is going to be finished, we conclude that it is a very positive experience and we recommend doing the same with the new degrees of the European Higher Education Area (EHEA), as we plan.

关键词： Company Networks Active Learning Educational Innovation Project Cooperative Learning

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Educational Innovation Project in the Field of Industrial Informatics

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Procedia - Social and Behavioral sciences 2014年 141卷 20-24页

作者： Jose Manuel Lopez-Guede Manuel Graña Jesus Maria Larrañaga Fernando Oterino Department of Systems Engineering and Automatic Control University College of Engineering of Vitoria Basque Country University (UPV/EHU) Vitoria 01006 Spain Department of Computer Science and Artificial Intelligence Faculty of Informatics Basque Country University (UPV/EHU) San Sebastian 20018 Spain Department of Business Management University College of Engineering of Vitoria Basque Country University (UPV/EHU) Vitoria 01006 Spain Department of Electronics University College of Engineering of Vitoria Basque Country University (UPV/EHU) Vitoria 01006 Spain

The objective of this paper is to describe an ongoing work that we are carrying out in the frame of an educational innovation project supported by the Education Advisory Service of the Vicerectorship for Teaching Quality and Innovation (University of the Basque Country, Spain). The project is driven by means of the subject of Industrial Informatics of the degree of Industrial Electronic Engineering and automatics (University College of Engineering of Vitoria, Basque Country University, Spain). The design of the project is based on the development of a collaborative work distributed among all the students of the subject, grouped in several teams or working groups. The work developed by each of those groups is complementary, and when all these parts of work are finished, all of them will fit together. The conclusion reached until this moment through the continuous tracking of the students is that there is an increased and more active attendance. Besides, the results reached by the students in different evaluations have improved those reached by means of the traditional paradigm of learning.

关键词： Industrial Informatics Active Learning Educational Innovation Project Cooperative Learning

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Towards socket-level network header caching

Towards socket-level network header caching

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Roedunet International Conference (RoEduNet)

作者： Vlad Dogaru Radu Iliescu Nicolae Ţăpuş Faculty of Automatic Control and Computer Science University POLITEHNICA of Bucharest Ixia Communications Bucharest Romania

In recent years, we are seeing an important increase in network interface transmission rates. This poses a challenge to come up with better methods of mitigating latency at all levels in a computer system. In this paper, we propose an approach that works well in systems where scatter-gather transfers are fast compared to memory accesses. We note that, in a Transport level flow, a large part of the Network and Data Link layer headers do not vary. As a result, we assert that it is favorable to store the parts of the header that do not vary, instead of copying them from the socket data structure to the packet buffer for each packet transmission. The network interface then uses scatter-gather to assemble the network packet without explicitly copying data in memory. This approach was partially implemented, but we propose extending it from the Data Link to the superior Network level, hoping that it will aid in lessening the load on legacy hardware at high packet transmission rates.

关键词： Protocols Sockets IP networks Linux Internet Electronic mail Hardware

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An Alternative Approach for Oscillatory Behaviour control in a Nonlinear Bioprocess

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IFAC Proceedings Volumes 2013年第23期46卷 253-258页

作者： Piotr Skupin Mieczystaw Metzger Faculty of Automatic Control Electronics and Computer Science Silesian University of Technology ul. Akademicka 16 44-100 Gliwice Poland

The nonlinear nature of bioprocesses often leads to the occurrence of the self-sustained oscillations of the biomass concentration in continuous flow bioreactors. For some practical reasons, sometimes it is necessary to control the oscillatory behaviour, which is usually achieved by changing the dilution rate, but this is not always the best option. Hence, the main idea of this paper is to introduce an additional substrate, which has been previously diluted. Based on the numerical analysis of an unstructured mathematical model, it is shown that by mixing two various substrates (the main and the diluted one), it is possible to induce or eliminate the sustained oscillations. As a result, the contribution of both substrates to the mixture and the degree of dilution of the additional substrate can be treated as new control variables.

关键词： Limit cycle Self-sustained oscillations Double substrate Bioreactor Nonlinear process

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A spatial pyramid approach for texture classification

A spatial pyramid approach for texture classification

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International Symposium on Electrical and Electronics Engineering (ISEEE)

作者： Andreea Lavinia Popescu Radu Tudor Ionescu Dan Popescu Faculty of Automatic Control and Computer Science Politehnica University of Bucharest Bucharest Romania Department of Computer Science University of Bucharest Bucharest Romania

Texture classification, texture synthesis, or similar tasks are an active topic in computer vision and pattern recognition. This paper aims to present two spatial pyramid representations for texture classification. Most techniques designed for texture classification are based on machine learning. Images are usually represented as feature vectors, which are then used to train a classifier. In the spatial pyramid representation, images are divided into increasingly fine sub-regions (bins) and features are extracted from each bin. This representation is able to capture details about the fractal structure of the texture images. Two experiments are conducted on popular texture classification data sets, namely Brodatz and UIUCTex. In the experiments, several kernel representations and kernel classifiers are combined and evaluated. It seems that the spatial pyramid in combination with intersection kernel and Kernel Discriminant Analysis gives the best results. The proposed pyramid representations can improve the accuracy by as much as 5% over the standard feature representation, showing that the pyramid structure is indeed useful for texture classification.

关键词： Kernel Feature extraction Accuracy Vectors Fractals Standards Training

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Structured coprime factorizations description of linear and time-invariant networks

Structured coprime factorizations description of linear and ...

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52nd IEEE Conference on Decision and control, CDC 2013

作者： SabǍu, Şerban OarǍ, Cristian Warnick, Sean Jadbabaie, Ali Electrical and Computer Engineering Dept. Stevens Institute of Technology United States Faculty of Automatic Control Dept. University Politehnica Bucharest Romania Faculty of Computer Science Department Information and Decision Algorithms Laboratories Brigham Young University United States Faculty of Electrical and Systems Engineering Dept. University of Pennsylvannia United States

ISBN: (纸本)9781467357173

In this paper we study state-space realizations of Linear and Time-Invariant (LTI) systems. Motivated by biochemical reaction networks, Gonçalves and Warnick have recently introduced the notion of a Dynamical Structure Functions (DSF), a particular factorization of the system's transfer function matrix that elucidates the interconnection structure in dependencies between manifest variables. We build onto this work by showing an intrinsic connection between a DSF and certain sparse left coprime factorizations. By establishing this link, we provide an interesting systems theoretic interpretation of sparsity patterns of coprime factors. In particular we show how the sparsity of these coprime factors allows for a given LTI system to be implemented as a network of LTI sub-systems. We examine possible applications in distributed control such as the design of a LTI controller that can be implemented over a network with a pre-specified topology. ©2013 IEEE.

关键词： Factorization

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