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3rd International Workshop on Equation-Based Object-Oriented Modeling Languages and Tools, EOOLT 2010 - In Conjunction with the MODELS 2010 Conference

作者： Schamai, Wladimir Pohlmann, Uwe Fritzson, Peter Paredis, Christiaan J.J. Helle, Philipp Strobel, Carsten EADS Innovation Works Germany Department of Computer Science University of Paderborn Germany PELAB - Programming Environment Lab Linköping University Sweden Georgia Institute of Technology Atlanta United States

ModelicaML is a UML profile for the creation of executable models. ModelicaML supports the Model-Based Systems Engineering (MBSE) paradigm and combines the power of the OMG UML standardized graphical notation for systems and software modeling, and the simulation power of Modelica. This addresses the increasing need for precise integrated modeling of products containing both software and hardware. This paper focuses on the implementation of executable UML state machines in ModelicaML and demonstrates that using Modelica as an action language enables the integrated modeling and simulation of continuous-time and reactive or event-based system dynamics. More specifically, this paper highlights issues that are identified in the UML specification and that are experienced with typical executable implementations of UML state machines. The issues identified are resolved and rationales for design decisions taken are discussed.

关键词： Continuous time systems

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A filtered tuning method for a GPC controller

A filtered tuning method for a GPC controller

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IET Irish Signals and Systems Conference (ISSC 2010)

作者： M.H. Schwarz C.S. Cox J. Börcsök Department of Computer architecture and System programming Safety Computer Technology University of Kassel Germany Control Systems Centre University of Sunderland UK Department of Computer architecture and System programming University of Kassel Germany

This paper presents a new tuning method based on model parameters identified in closed-loop. For classical controllers such as PI(D) controllers a large number of simple tuning methods for various application areas exist. However, when it comes to designing a generalised predictive controller (GPC) four parameters have to be specified. To choose those parameters is not a trivial task since they are not directly related to control or regulation performance. The presented tuning method exploits model-parameters to select suitable controller parameters. Additionally, a Rhinehart filter is incorporated in the design to decrease the impact of noise, therefore, a fifth parameter has to be optimised. The proposed method has been tested in simulation and on a real system.

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An Efficient Algorithm to Solve the Conditional Covering Problem on Trapezoid Graphs

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International Scholarly Research Notices 2011年第1期2011卷

作者： Akul Rana Anita Pal Madhumangal Pal Department of Mathematics Narajole Raj College Paschim Medinipur Narajole 721 211 India Department of Mathematics National Institute of Technology Durgapur 713209 Indianitdgp.ac.in Department of Applied Mathematics with Oceanology and Computer Programming Vidyasagar University Midnapore 721 102 Indiavidyasagar.ac.in

Let G = ( V , E ) be a simple connected undirected graph. Each vertex v ∈ V has a cost c ( v ) and provides a positive coverage radius R ( v ). A distance d uv is associated with each edge { u , v } ∈ E, and d ( u , v ) is the shortest distance between every pair of vertices u , v ∈ V . A vertex v can cover all vertices that lie within the distance R ( v ), except the vertex itself. The conditional covering problem is to minimize the sum of the costs required to cover all the vertices in G . This problem is NP-complete for general graphs, even it remains NP-complete for chordal graphs. In this paper, an O ( n 2 ) time algorithm to solve a special case of the problem in a trapezoid graph is proposed, where n is the number of vertices of the graph. In this special case, d uv = 1 for every edge { u , v } ∈ E , c ( v ) = c for every v ∈ V ( G ), and R ( v ) = R , an integer >1, for every v ∈ V ( G ). A new data structure on trapezoid graphs is used to solve the problem.

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Coloring gray-scale image using artificial neural networks

Coloring gray-scale image using artificial neural networks

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2nd International Conference on Adaptive Science and technology, ICAST 2009

作者： Karlik, Bekir Sariöz, Mustafa Haliç University Department of Computer Engineering 34381 Istanbul Turkey Fatih University Computer Technology and Programming 34500 Istanbul Turkey

ISBN: (纸本)9781424435234

This paper presents a novel method on coloring the grayscale images. For this purpose, a combination of artificial neural networks and some image processing algorithms was developed to transfer colors from a user-selected source image to a target grayscale image. According to the results of this combining method, a survey where volunteers were asked to rate the plausibility of the colorings generated automatically was performed for individual images. In most cases automatically-colored images were rated either as totally or mostly acceptable. ©2009 IEEE.

关键词： Neural networks

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Self-management in a control architecture for parallel kinematic robots

Self-management in a control architecture for parallel kinem...

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2008 ASME International Design Engineering Technical Conferences and computers and Information in Engineering Conference, DETC 2008

作者： Maaß, Jochen Steiner, Jens Amado, Ana Michaela, Huhn Raatz, Annika Hesselbach, Jurgen Institute for Machine Tools and Production Technology Department of Mechanical Engineering TU Braunschweig 38106 Braunschweig Germany Institute for Programming and Reactive Systems Department of Computer Science TU Braunschweig 38106 Braunschweig Germany

ISBN: (纸本)9780791843253

Maintainability, extendibility and reusability of components in the design of robot control architectures is a major challenge. Parallel kinematic robots feature a wide variety of structures and applications. They are subject to easy reconfiguration because of the passive structure limbs. This class of robots requires more extensive calculations in their control laws than serial manipulators. During complex motion tasks, such as the ones required in assembly sequences, the algorithmic load may also vary over time. However, no generic control approach exists in order to reduce the complexity of control design for these kind of robots. In this paper the authors introduce an architecture for handling and assembly applications featuring self-management techniques as an approach to tackle these problems. The existing architecture features a modular and layered design. Concepts of self-management and self-optimization applied to this architecture are outlined. These properties are realized by the integration of self-managers within crucial system components. The mechanisms are extended for a future distributed version of the architecture. Real-time properties are guaranteed by an online formal analysis that verifies planned adaptations before realizing them. Copyright © 2008 by ASME.

关键词： Reusability

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Coloring gray-scale image using artificial neural networks

Coloring gray-scale image using artificial neural networks

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International Conference on Adaptive Science & technology (ICAST)

作者： Bekir Karlik Mustafa Sariöz Department of Computer Engineering Haliç University Istanbul Turkey Computer Technology and Programming Fatih University Istanbul Turkey

关键词： Gray-scale Artificial neural networks Color Humans Pixel Image databases Motion pictures computer networks Image processing Data visualization

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Separation of concerns for Multithreads Object-Oriented programming

Separation of concerns for Multithreads Object-Oriented Prog...

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International Conference on Electrical Engineering/Electronics, computer, Telecommunications and Information technology, ECTI-CON

作者： Paniti Netinant Concurrent Programming Research Group Illinois Institute of Technology Chicago IL USA Computer Science Department Bangkok University Bangkok Thailand

Multithreaded Object-Oriented programming in concurrency environment using object-oriented technology is a complex activity. Programmers need to be aware of issues unrelated to their domain of problem, and are often unprepared for the challenges of the concurrent object-oriented programming brings. The interaction of their components becomes more complex, and makes it difficult to validate the design and correctness of the implemented program. Supporting separation of concerns in the design and implementation of the multithreaded object-oriented programming can provide a number of benefits such as comprehension, reusability, extensibility and adaptability in both design and implementation. We have tackled this problem by adopting the technique of separation of concerns in multithreaded object-oriented programming. In this paper we demonstrate an aspect-oriented approach that can be used for multithreaded object-oriented programming. We also show how better the separation of concerns in components. Readers/Writers problem is demonstrated using an aspect-oriented approach. Our methodology, which is based on aspect-oriented techniques as well as language and architecture independence, is an aspect-oriented framework.

关键词： Object oriented programming computer architecture programming profession Yarn Concurrent computing Parallel programming Delay Robustness Software architecture Software development management

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Performance Characterization of SPEC CPU2006 Benchmarks on Intel and AMD Platform

Performance Characterization of SPEC CPU2006 Benchmarks on I...

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International Workshop on Education technology and computer Science, ETCS

作者： Shengmei Li Buqi Cheng Xingyu Gao Lin Qiao Zhizhong Tang Department of Computer Science and Technology Tsinghua University Beijing China Programming Systems Laboratory Intel China Research Center Limited Beijing China Chinese Academy and Sciences Beijing China

For understanding the performance differences caused by different computer architectures and optimization technologies, the paper characterizes performance of SPEC CPU2006 benchmarks both on Intel and AMD platform. Using the performance events collected by Performance Monitor Unit, we compare their performance differences and analyze the causes from the features of architectures and the optimization technologies. Our results and analysis help the programmers better understand the memory performance and branch prediction performance which are caused by architectures and guide them in the optimization. The analysis also help the processor architects better balance among the key architecture factors such as memory disambiguation and hardware prefetch when doing architecture design decision.

关键词： Microarchitecture Decoding Educational technology Paper technology programming profession Performance analysis computer science computer architecture Hardware Prefetching

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Reactive queries in mobile ad hoc networks

Reactive queries in mobile ad hoc networks

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6th International Workshop on Middleware for Pervasive and Ad-Hoc Computing, MPAC 2008 - Held at the ACM/IFIP/USENIX 9th International Middleware Conference, Middleware 2008

作者： Lombide Carreton, Andoni Van Cutsem, Tom De Meuter, Wolfgang Programming Technology Lab Department of Computer Science Vrije Universiteit Brussel Belgium Belgium

ISBN: (纸本)9781605583648

Pervasive computing in mobile ad hoc networks requires that applications query their network environment for services and react to a plethora of events fired by other devices in that network responding to such queries. Current context-aware and event-driven architectures require the programmer to react to these events via a carefully crafted network of observers and event handlers, while inherently introducing complex concurrency issues. This paper proposes the integration of two techniques to solve these problems: ambient references and reactive programming. Ambient references are object-oriented communication abstractions that represent nearby remote objects in the mobile network and that make it possible to generate the events mentioned above. The reactive programming paradigm provides an abstraction over events such that the application can be written in a conventional programming style with explicit control flow. Copyright 2008 ACM.

关键词： Middleware

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Ambient transactors

Ambient transactors

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6th International Workshop on Middleware for Pervasive and Ad-Hoc Computing, MPAC 2008 - Held at the ACM/IFIP/USENIX 9th International Middleware Conference, Middleware 2008

作者： Scholliers, Christophe Van Cutsem, Tom De Meuter, Wolfgang Programming Technology Lab Department of Computer Science Vrije Universiteit Brussel Belgium Belgium

ISBN: (纸本)9781605583648

Extensions to the actor model have been proposed to ease the development of mobile ad hoc applications. However, programming in the actor model is still difficult as it does not provide abstractions to synchronously coordinate multiple actors. Thus, when programmers want to coordinate two or more actors they have to do it by hand. Additionally, programmers need to write failure recovery code for failures caused by the concurrent access to the actors they are using. Coding this manually is error prone and might even be not feasible. We propose a language abstraction based on software transactional memory to coordinate actors. We show that the integration of software transactional memory with the actor model makes writing failure recovery code superuous. Moreover, we show that our system even handles those cases where manually writing the failure recovery code is not feasible. Copyright 2008 ACM.

关键词： Middleware

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