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Hierarchical control architectures in industrial automation: a design approach based on the generalized actuator concept

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IFAC Proceedings Volumes 2008年第2期41卷 69-76页

作者： Eugenio Faldella Andrea Paoli Matteo Sartini Andrea Tilli DEIS - Department of Electronic Computer Science and Systems University of Bologna Viale Risorgimento 2 − 40136 Bologna ITALY Center for Research on Complex Automated Systems (CASY) Giuseppe Evangelisti DEIS - Department of Electronic Computer Science and Systems University of Bologna Viale Pepoli 3/2 − 40123 Bologna ITALY

In this paper an effective design approach to the design of hierarchical control architectures for the automation industrial plants is presented. The main characteristic of the solution is the clear and structural separation between “policies” and “actions” deriving from the use of a novel abstract entity in modelling automation plants: the Generalized Actuator. Particular attention is paid to illustrate how to define generalized actuators starting from a “bare plant”. The potentialities of this method are emphasized by means of a case study.

关键词： Modelling and design of automation control systems Process supervision Flexible and reconfigurable automation systems

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Monte Carlo simulation of charge transport in amorphous chalcogenides

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Journal of Physics: Conference Series 2009年第1期193卷

作者： E Piccinini F Buscemi M Rudan R Brunetti C Jacoboni ARCES Alma Mater Studiorum University of Bologna Via Toffano 2/2 I-40125 Bologna Italy S3 Research Center CNR-INFM Via Campi 213/A Modena I-41125 Italy Department of Electronics Computer Science and Systems University of Bologna Viale Risorgimento 2 I-40136 Bologna Italy Physics Department University of Modena and Reggio Emilia Via Campi 213/A I-41025 Modena Italy

The I(V) characteristics of amorphous GST devices show a peculiar S-shape behavior, that is a swift rise of the current along with a voltage snap-back. This type of characteristics led to a growing research interest in view of the future application of such materials to the manufacturing of phase-change memory devices. In this work we adopt a generalization of the variable-range hopping theory to simulate charge transport in a layer of amorphous Ge2Sb2Te5 sandwiched between two planar metallic electrodes. The numerical implementation of a current-driven Monte Carlo code allows one both to provide a complete microscopic particle picture of electrical conduction in the device and to better analyze the mechanisms governing the snap-back effect.

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Reengineering a domain-independent framework for Spoken Dialogue systems

Reengineering a domain-independent framework for Spoken Dial...

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2008 Software Engineering, Testing, and Quality Assurance for Natural Language Processing at the ACL/HLT 2008

作者： Martins, Filipe M. Mendes, Ana Viveiros, Márcio Pardal, Joana Paulo Arez, Pedro Mamede, Nuno J. Neto, João Paulo Spoken Language Systems Laboratory L2F - INESC-ID Department of Computer Science and Engineering Instituto Superior Técnico Technical University of Lisbon R. Alves Redol 9 - 2◦ Lisboa1000-029 Portugal

ISBN: (纸本)9781932432107

Our work in this area started as a research project but when L2F joined TecnoVoz, a Portuguese national consortium including Academia and Industry partners, our focus shifted to real-time professional solutions. The integration of our domain-independent Spoken Dialogue System (SDS) framework into commercial products led to a major reengineering process. This paper describes the changes that the framework went through and that deeply affected its entire architecture. The communication core was enhanced, the modules interfaces were redefined for an easier integration, the SDS deployment process was optimized and the framework robustness was improved. The work was done according to software engineering guidelines and making use of design patterns. © 2008 Association for Computational Linguistics.

关键词： Reengineering

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A component-oriented reliability assessment method for open source software

A component-oriented reliability assessment method for open ...

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作者： Tamura, Yoshinobu Yamada, Shigeru Department of Computer Science Hiroshima Institute of Technology Miyake 2-1-1 Saeki-ku Hiroshima 731-5193 Japan Department of Social Systems Engineering Tottori University Minami 4-101 Koyama Tottori 680-8552 Japan

Software development environment has been changing into new development paradigms such as concurrent distributed development environment and the so-called open source project by using network computing technologies. Especially, an OSS (open source software) system which serves as key components of critical infrastructures in the society is still ever-expanding now. In case of considering the effect of the debugging process on an entire system in the development of a method of reliability assessment for the OSS, it is necessary to grasp the deeply-intertwined factors, such as programming path, size of each component, skill of fault reporter, and so on. In order to consider the effect of each software component on the reliability of an entire system, we propose a new approach to user-oriented software reliability assessment by creating a fusion of neural network and software reliability growth modeling. In this paper, we show application examples of component-oriented software reliability assessment based on neural network and software reliability growth modeling for the OSS. Also, we analyze actual software fault count data to show numerical examples of software reliability assessment for the OSS. Moreover, we develop the testing management tool for OSS. © 2008 World Scientific Publishing Company.

关键词： Software reliability

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Asymptotic tracking of non-sinusoidal periodic references: a switched linear internal model approach

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IFAC Proceedings Volumes 2008年第2期41卷 3895-3900页

作者： Carlo Rossi Andrea Tilli Manuel Toniato CASY Center for Research on Complex Automated Systems DEIS Department of Electronics Computer Science and Systems University of Bologna Viale Carlo Pepoli 3/2 Bologna Italy

The regulation theory is a very robust way to achieve the asymptotic tracking of input references on Linear Time-Invariant systems generated by an exosystem. Nevertheless, the classical regulation theory cannot be applied to the asymptotic tracking of non-sinusoidal periodic references having an infinite number of harmonics (as triangular waves). In literature many methods have been proposed to deal with this kind of problem. In this paper a novel approach based on a Switched Linear Internal Model is proposed by presenting some preliminary results. This approach seems particularly promising in terms of robustness to disturbances not “captured” by the internal model and this is the main motivation of starting this study.

关键词： Switching control Regulation Tracking

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Combination of audio and lyrics features for genre classification in digital audio collections 08

Combination of audio and lyrics features for genre classific...

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16th ACM International Conference on Multimedia, MM '08

作者： Mayer, Rudolf Neumayer, Robert Rauber, Andreas 1Department of Software Technology and Interactive Systems Vienna University of Technology Favoritenstraße 9-11 1040 Vienna Austria 2Department of Computer and Information Science Norwegian University of Science and Technology Sem Sælands vei 7-9 7491 Trondheim Norway

ISBN: (纸本)9781605583037

In many areas multimedia technology has made its way into mainstream. In the case of digital audio this is manifested in numerous online music stores having turned into profitable businesses. The widespread user adaption of digital audio both on home computers and mobile players show the size of this market. Thus, ways to automatically process and handle the growing size of private and commercial collections become increasingly important;along goes a need to make music interpretable by computers. The most obvious representation of audio files is their sound - there are, however, more ways of describing a song, for instance its lyrics, which describe songs in terms of content words. Lyrics of music may be orthogonal to its sound, and differ greatly from other texts regarding their (rhyme) structure. Consequently, the exploitation of these properties has potential for typical music information retrieval tasks such as musical genre classification;so far, there is a lack of means to efficiently combine these modalities. In this paper, we present findings from investigating advanced lyrics features such as the frequency of certain rhyme patterns, several parts-of-speech features, and statistic features such as words per minute (WPM). We further analyse in how far a combination of these features with existing acoustic feature sets can be exploited for genre classification and provide experiments on two test collections. Copyright 2008 ACM.

关键词： Music

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Ubiquitous reassortments in influenza a viruses

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Journal of Bioinformatics and Computational Biology 2008年第5期6卷 981-999页

作者： Wan, Xiu-Feng Ozden, Mufit Lin, Guohui Systems Biology Laboratory Department of Microbiology Miami University Oxford OH 45056 United States Department of Computer Science and Systems Analysis Miami University Oxford OH 45056 United States Department of Computing Science University of Alberta Edmonton AB T6G 2E8 Canada Influenza Division Centers for Disease Control and Prevention Atlanta GA 30333 1600 Clifton Road United States

The influenza A virus is a negative-stranded RNA virus composed of eight segmented RNA molecules, including polymerases (PB2, PB1, PA), hemagglutinin (HA), nucleoprotein (NP), neuraminidase (NA), matrix protein (MP), and nonstructure gene (NS). The influenza A viruses are notorious for rapid mutations, frequent reassortments, and possible recombinations. Among these evolutionary events, reassortments refer to exchanges of discrete RNA segments between co-infected influenza viruses, and they have facilitated the generation of pandemic and epidemic strains. Thus, identification of reassortments will be critical for pandemic and epidemic prevention and control. This paper presents a reassortment identification method based on distance measurement using complete composition vector (CCV) and segment clustering using a minimum spanning tree (MST) algorithm. By applying this method, we identified 34 potential reassortment clusters among 2,641 PB2 segments of influenza A viruses. Among the 83 serotypes tested, at least 56 (67.46%) exchanged their fragments with another serotype of influenza A viruses. These identified reassortments involve 1,957 H2N1 and 1,968 H3N2 influenza pandemic strains as well as H5N1 avian influenza virus isolates, which have generated the potential for a future pandemic threat. More frequent reassortments were found to occur in wild birds, especially migratory birds. This MST clustering program is written in Java and will be available upon request. © 2008 Imperial College Press.

关键词： Avian influenza virus CCV Influenza A virus Minimum spanning tree Reassortment

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A room modeling method for 3D video

A room modeling method for 3D video

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2008 International Conference on Parallel and Distributed Processing Techniques and Applications, PDPTA 2008

作者： Isshiki, Aya Sakamoto, Ryuuki Kitahara, Itaru Kogure, Kiyoshi Joe, Kazuki Information and Computer Sciences Department Nara Women's University Nara 630-8506 Japan Department of Computer and Communication Sciences Wakayama University Sakaedani 930 Wakayama Wakayama 640-8510 Japan Department of Intelligent Interaction Technologies Graduate School of Systems and Information Engineering University of Tsukuba Tennoudai 1-1-1 Tsukuba Ibaraki 305-8573 Japan ATR Knowledge Science Laboratories Hikaridai 2-2-2 Keihanna Science City Kyoto 619-0288 Japan

ISBN: (纸本)1601320841

This paper proposes a system to reconstruct the 3D shape model of background regions for generating 3D video easily. As the progress of computer vision technologies continues, many 3D video systems have been developed that tend to focus on automatic 3D reconstruction to capture target (foreground) objects. On the other hand, the 3D shapes of background regions such as walls and floors are generally made manually, for example, using 3D modeling software such as CAD. However, the operation is not easy for novices. Our system provides an easy background modeling method for such users. User operations include segmenting multiple background images into several boxes by indi cating their vertices and giving the correspondence of the boxes between multiple images. As a result, the 3D coordinates of the vertices are calculated using a stereo vision algorithm.

关键词： Stereo vision

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A method of reliability assessment based on deterministic chaos theory for an open source software

A method of reliability assessment based on deterministic ch...

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2nd IEEE International Conference on Secure System Integration and Reliability Improvement, SSIRI 2008

作者： Tamura, Yoshinobu Yamada, Shigeru Department of Computer Science Faculty of Applied Information Science Hiroshima Institute of Technology Miyake 2-1-1 Saeki-ku Hiroshima-shi 731-5193 Japan Department of Social Systems Engineering Faculty of Engineering Tottori University Minami 4-101 Koyama Tottori-shi 680-8552 Japan

ISBN: (纸本)9780769532660

Open source software which serve as key components of critical infrastructures in the social life are still ever-expanding now. We focus on the quality problems of open source software developed under open source project. In case of considering the effect of the debugging process in the development of a method of reliability assessment for open source project, it is necessary to grasp the deeply-intertwined factors, such as programming path, size of each component, skill of fault reporters, and so on. Considering from a point of view of the software reliability growth model, it is difficult to cover the software fault-report phenomena on the bug tracking system of open source software. We propose a new approach to software reliability assessment based on deterministic chaos theory. Also, we analyze actual software fault count data to show numerical examples of software reliability assessment for the open source software. © 2008 IEEE.

关键词： Open source software

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A domain specific language for the definition of extended queueing network models

A domain specific language for the definition of extended qu...

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IASTED International Conference on Software Engineering, SE 2008

作者： Gianni, Daniele D'Ambrogio, Andrea Department of Electrical and Electronic Engineering Imperial College Exhibition Road SW7 2AZ London United Kingdom Department of Computer Science Systems and Production University of Rome TorVergata Via del Politecnico 1 I-00133 Rome Italy

ISBN: (纸本)9780889867154

The use of design patterns and modular decomposition for the development of component-based software products brings significant improvements in terms of several quality attributes (e.g., reusability, reliability, maintainability). In addition, the modular design of interacting software components allows the foundation of a flexible Domain Specific Language (DSL) that acts as a model description language rather than a coding language, bringing significant savings in terms of development effort. This is particularly true in the field of simulation, in which the use of a common language both to represent and to simulate a given simulation model practically eliminates the need and the effort to fill the gap between the model specification and the simulator implementation. This paper introduces the design features of jEQN, a language for the specification and implementation of simulation models based on extended queueing networks. Details concerning the application of design patterns, modular decomposition and generic type parameters are also presented.

关键词： Reusability

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