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Executable Requirements Specification: Formal Semantics of Live Activity Diagrams

Executable Requirements Specification: Formal Semantics of L...

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Theoretical Aspects of Software Engineering (TASE)

作者： Christoph Knieke Michaela Huhn Malte Lochau TU Braunschweig Institute for Programming and Reactive Systems Brunswick Germany

Errors, inconsistences, incompletenesses and ambiguities in the requirements specification are major reasons for the failure of IT projects. Since the new major version 2 of the UML, the suitability of activity diagrams for modeling requirements has increased significantly. UML 2 activity diagrams are based upon a completely reengineered metamodel including many new features and an improved semantic precision. We provide a formal syntax and operational semantics for activity diagrams to allow for fully executable models. Inspired by the scenario-based language of live sequence charts, some extensions for activity diagrams are proposed including a distinction between possible and mandatory behavior. The proposed semantics paves the way for formal reasoning and tool development that allows for early prototyping and validation by simulation.

关键词： Unified modeling language Fingers Safety Power system protection Software engineering Virtual prototyping System testing Prototypes Formal verification Technological innovation

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Learning event detection rules with noise hidden Markov models

Learning event detection rules with noise hidden Markov mode...

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2012 NASA/ESA Conference on Adaptive Hardware and systems, AHS 2012

作者： Mutschler, Christopher Philippsen, Michael Programming Systems Group CS Dept. University of Erlangen-Nuremberg Germany Sensor Fusion and Event Processing Group Locating and Comm. Systems Dept. Fraunhofer Institute for Integrated Circuits IIS Erlangen Germany

ISBN: (纸本)9781467319157

Complex Event Processing (CEP) is a popular method to monitor processes in several contexts, especially when dealing with incidents at distinct points in time. Specific temporal combinations of various events are often of special interest for automatic detection. For the description of such patterns, one can either implement rules in some higher programming language or use some Event Description Language (EDL). Both is complicated and error-prone for non-engineers, because it varies greatly from natural language. Therefore, we present a method, by which a domain expert can simply signal the occurrence of a significant incident at a specific point in time. The system then infers rules for automatically detecting such occurrences later on. At the core of our approach is an extension of hidden Markov models (HMM) called noise hidden Markov models (nHMM) that can be trained with existing, low-level event data. The nHMM can be applied online without any intervention of programming experts. An evaluation on both synthetic and real event data shows the efficiency of our approach even under the presence of highly frequent, insignificant events and uncertainty in the data. © 2012 IEEE.

关键词： Hidden Markov models

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Complexity Reduced IIR Filter Design for FPGA 2

Complexity Reduced IIR Filter Design for FPGA

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2nd IEEE International Conference on System Analysis and Intelligent Computing, SAIC 2020

作者： Sergiyenko, Anatoliy Serhienko, Anastasia Igor Sikorsky Kyiv Polytechnic Institute Dept. of Computer Engineering Kyiv Ukraine Igor Sikorsky Kyiv Polytechnic Institute Dept. of System Programming and Specialized Computer Systems Kyiv Ukraine

ISBN: (纸本)9781728190822

In this paper, a method of high order IIR filter design is proposed in which the coefficients in the canonical binary number system representation are searched by the simulated annealing algorithm. The high-quality IIR filters are designed using the all-pass filter stages, methods of masking filters and multiplied delays. It was proven, that if the coefficients of the multiplierless filter have no more than three summands in their representation, then its pipelined implementation in FPGA has the highest clock frequency. The use of the VHDL language in all the steps of the filter design helps to speed-up and improve the filter optimization. © 2020 IEEE.

关键词： IIR filters

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UML-Based Analysis of Power Consumption for Real-Time Embedded systems

UML-Based Analysis of Power Consumption for Real-Time Embedd...

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IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom)

作者： Matthias Hagner Adina Aniculaesei Ursula Goltz Institute for Programming and Reactive Systems TU Braunschweig Brunswick Germany

The complexity of embedded systems has risen significantly in the last years. The model based development approach helped to keep an overview over the development and over the fulfillment of non-functional properties, as it is possible to capture and analyze the scheduling using UML development models. Other aspects, e.g. the power consumption, are not considered in development models, modelling languages, and analysis support based on development models. The common approach is to measure the consumption at the end of the development, but there is no tool support for earlier phases analysis. We present a UML profile for power/energy consumption and a simple algorithm to analyze the power consumption based on an UML model extended with our profile. As more power awareness could result in losing real-time constraints, we consider both aspects, real-time scheduling and power awareness, and present a method to bring both non-functional properties and their analyses in context. Additionally, we present an approach to find a task configuration for a dynamic voltage scaling system that satisfies all real-time requirements, but is most power efficient.

关键词： Unified modeling language Power demand Real time systems Analytical models Voltage control Energy consumption Embedded systems

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A Case Study of Valency Patterns for Motion Verbs in Vakh Khanty by Means of Lingvodoc

A Case Study of Valency Patterns for Motion Verbs in Vakh Kh...

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2022 Ivannikov Open Conference, ISPRAS 2022

作者： Novitskaya, Irina Vorobeva, Victoria National Research Tomsk State University Department of Foreign Languages Tomsk Russia Ivannikov Institute for System Programming of the Ras Information Systems Department Tomsk Moscow Russia Tpu Information Systems Department Tomsk Moscow Russia

ISBN: (纸本)9798350398533

The article presents a study of the syntactic compatibility of verbs of motion in the Vakh dialect of the Khanty language. The study was conducted with the help of the tools of the platform for documentation of the Uralic languages Lingvodoc. The purpose of the article is to describe patterns of syntactic valency that Vakh Khanty verbs of motion have. © 2022 IEEE.

关键词： Syntactics

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Evolutionary algorithms that use runtime migration of detector processes to reduce latency in event-based systems

Evolutionary algorithms that use runtime migration of detect...

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

作者： Löffler, Christoffer Mutschler, Christopher Philippsen, Michael Programming Systems Group CS Dept. University of Erlangen-Nuremberg Germany Sensor Fusion and Event Processing Group Locating and Comm. Systems Dept. Fraunhofer Institute for Integrated Circuits IIS Erlangen Germany

ISBN: (纸本)9781467363839

Event-based systems (EBS) are widely used to efficiently process massively parallel data streams. In distributed event processing the allocation of event detectors to machines is crucial for both the latency and efficiency, and a naive allocation may even cause a system failure. But since data streams, network traffic, and event loads cannot be predicted sufficiently well the optimal detector allocation cannot be found a-priori and must instead be determined at runtime. This paper describes how evolutionary algorithms (EA) can be used to minimize both network and processing latency by means of runtime migration of event detectors. The paper qualitatively evaluates the algorithms on synthetical data streams in a distributed event-based system. We show that some EAs work efficiently even with large numbers of event detectors and machines and that a hybrid of Cuckoo Search and Particle Swarm Optimization outperforms others. © 2013 IEEE.

关键词： Particle swarm optimization (PSO)

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Unification and Evaluation of Graph Drawing Algorithms for Different Application Domains

Unification and Evaluation of Graph Drawing Algorithms for D...

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International Conference on Information Visualisation (IV)

作者： B. Florentz T. Muecke Institute for Programming and Reactive Systems Technical University of Braunschweig Brunswick Germany

Today formalisms with graphical representations are used to model structure, behavior, and other views on software and systems. The UML is just one example for modeling languages with graphical representation of its models. Although most models are executable without explicit graphical information of the model's elements, the appearance of a model is of particular importance for its readability. To improve the so called embedding of a graph representing a model or to create a initial embedding, an algorithmic support for arranging the elements is useful. We provide a software environment in which layout algorithms can be developed and evaluated. By defining proper interfaces for graph elements, we provide easy access to our library of layout algorithms for external use

关键词： Layout Software systems Application software Unified modeling language Software algorithms Software libraries Graphical models Computational modeling Java Testing

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LAR-CC: Large atomic regions with conditional commits

LAR-CC: Large atomic regions with conditional commits

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作者： Borin, Edson Wu, Youfeng Breternitz, Mauricio Wang, Cheng Institute of Computing University of Campinas Brazil Programming Systems Lab. Intel Labs. United Kingdom Advanced Software and Analytics Technology Group - AMD United Kingdom

ISBN: (纸本)9781612843551

HW/SW Co-designed systems rely on dynamic binary translation and optimizations for efficient execution of binary code. Due to memory ordering properties and other architectural constraints, most binary optimizations are applied to regions of code that are atomically executed. To ensure that the underlying hardware has enough speculative resources to execute the whole atomic region, these systems typically form short atomic regions, with only 20 to 30 instructions. However, the shorter is the atomic region the smaller is the scope for optimizations. We present LAR-CC, a novel technique that enables HW/SW co-designed systems to optimize large atomic regions and dynamically fit them into the available speculative hardware resources by means of conditional commits. The LAR-CC technique consists of two major components: 1) conditional branch instructions to conditionally skip commit operations;2) code transformations that replace commit operations by conditional commits and enable optimizations to be applied on the large atomic regions. Our experiments show that LAR-CC can effectively achieve dynamic atomic region sizes larger than 1000 instructions, providing sufficiently large scope to apply many advanced optimizations on HW/SW co-designed systems. © 2011 IEEE.

关键词： Cosine transforms

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Recent Developments in Fuzzy Logic and Fuzzy Sets 1

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丛书名： Studies in Fuzziness and Soft Computing

1000年

作者： Shahnaz N. Shahbazova Michio Sugeno Janusz Kacprzyk

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A Comparative Analysis of Multi-agent Simulation Platforms for Energy and Mobility Management 20th

A Comparative Analysis of Multi-agent Simulation Platforms ...

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Proceedings of the 20th European Conference on Multi-Agent systems, EUMAS 2023

作者： Ali, Aliyu Tanko Leucker, Martin Schuldei, Andreas Stellbrink, Leonard Sachenbacher, Martin Institute for Software Engineering and Programming Languages University of Lübeck Ratzeburger Allee 160 Lübeck Germany Institute for Multimedia and Interactive Systems University of Lübeck Ratzeburger Allee 160 Lübeck Germany

ISBN: (纸本)9783031432637

Effective energy and mobility management benefits from multi-agent simulations (MAS) to model complex interactions among various agent types. Selecting the optimal MAS platform to implement and simulate these interactions is vital for achieving accurate results, scalability to realistic problem sizes, and efficient computational performance. This paper investigates the energy and mobility domain and identifies key parameters such as the number and complexity of agents, parallel computing power, CPU requirements etc., for developing MAS in the context of this domain. It then presents a comprehensive evaluation of various MAS development platforms. Using a multi-level selection and elimination approach, we narrowed down our evaluation to two final candidates. We then implemented key aspects of our model in both platforms to compare them in terms of practical relevance. Our findings reveal that the *** platform outperforms the Mesa platform in terms of runtime performance, has a smaller memory footprint for large numbers of agents, and offers scalability, making it the most suitable choice for developing MAS for integrated energy and mobility models. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Scalability

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