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Distinguishing Environment and System in Coloured Petri Net Models of Reactive systems

Distinguishing Environment and System in Coloured Petri Net ...

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international symposium on Industrial Embedded systems

作者： Simon Tjell Department of Computer Science University of Aarhus Denmark

This paper introduces and formally defines the environment-and-system-partitioned property for behavioral models of reactive systems expressed in the formal modeling language coloured Petri net. The purpose of the formalization is to make it possible to automatically validate any CPN model with respect to this property based on structural analysis. A model has the environment-and-system-partitioned property if it is based on a clear division between environment and system. This division is important in many model-driven approaches to software development such as model-based testing and automated code-generation from models. A prototypical tool has been implemented for performing the structural analysis of coloured Petri net models and the principles of this tool is described. The aim of the paper is to make the guidelines and their formalized definitions along with a proof-of-concept for the automatic validation of the structure of models based on structural analysis.

关键词： Guidelines Automatic testing Prototypes Petri nets System testing Computer science programming Software testing Software prototyping Performance analysis

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Bidirectional Flow Shop Scheduling with Multi-Machine Capacity and Critical Operation Sequencing

Bidirectional Flow Shop Scheduling with Multi-Machine Capaci...

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IEEE international symposium on Intelligent Control (ISIC)

作者： ZhengYi John Zhao Thin-Yin Leong Shuzhi Sam Ge Hoong Chuin Lau Department of ECE NUS Singapore School of Information System Singapore Management University Singapore Department of Electrical & Computer Engineering National University of Singapore Singapore

We study a special bidirectional flow shop problem with multi-machine capacity and sequencing constraints on critical operations. A formulation is proposed in continuous time domain and compared with a mixed integer programming (MIP) formulation in discrete time domain. Of particular interest to us is the formulation of the machine utilization function -both in continuous time and in discrete time domain. Fast heuristics are proposed with the relaxation of the machine capacity. The performance of the heuristic and Lagrangian relaxation are compared with optimal solutions experimentally.

关键词： Job shop scheduling Containers Cranes Engineering management Linear programming Lagrangian functions Marine vehicles Intelligent control Control systems Processor scheduling

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A programming environment with runtime energy characterization for energy-aware applications

A programming environment with runtime energy characterizati...

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international symposium on Low Power Electronics and Design (ISLPED)

作者： Changjiu Xian Yung-Hsiang Lu Zhiyuan Li Department of Computer Science Purdue University West Lafayette Indiana School of Electrical and Computer Engineering Purdue University West Lafayette Indiana

System-level power management has been studied extensively. For further energy reduction, the collaboration from user applications becomes critical. This paper presents a programming environment to ease the construction of energy-aware applications. We observe that energy-aware programs may identify different ways (called options) to achieve the desired functionalities and choose the most energy-efficient option at runtime. Our framework provides a programming interface to obtain the estimated energy consumption for choosing a particular option. The energy is estimated based on runtime energy characterization that records a set of runtime conditions correlated with the energy consumption of the options. We provide the procedure and general guidelines for using the environment to construct energy-aware programs. The prototype demonstrates that (a) energy-aware applications can be programmed easily with our interface, (b) accurate estimates are achieved by integrating multiple runtime conditions, and (c) the framework can make multiple devices collaborate for significant energy savings (15% to 41%) with negligible time and energy overhead (

关键词： programming environments Runtime environment Application software Energy consumption Energy management Hardware Operating systems Computer science Collaboration Energy efficiency

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On the Verifiability of Programs Written in the Feature Language Extensions

On the Verifiability of Programs Written in the Feature Lang...

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IEEE international Symposim on High Assurance systems Engineering

作者： Wu-Hon F. Leung Computer Science Department Istituto Italiano di Tecnologia Canada

High assurance in embedded system software is difficult to attain. Verification relies on testing. The unreliable and costly testing process is made much worse because the software base constantly changes: Adding a feature is by changing the code of other features, and the programs of the features entangle in the same reusable program unit of the programming language. For a large class of applications, including those requiring exception handling, this entanglement problem cannot be solved using existing general purpose programming languages. The Feature Language Extensions (FLX) is a set of language constructs designed to enable the programmer to solve the entanglement problem. It provides language support for assertion based verification. The satisfiability of first order assertions composed of variables defined by FLX can be determined without iterations of trials and errors. An executable FLX program is compiled into a finite state machine even if the state variables are unbounded.

关键词： Computer languages programming profession Automata Software systems Software testing Embedded system Embedded software Software reusability Application software Java

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A Scalable Model-Free Recurrent Neural Network Framework for Solving POMDPs

A Scalable Model-Free Recurrent Neural Network Framework for...

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IEEE symposium on Adaptive Dynamic programming and Reinforcement Learning, (ADPRL)

作者： Zhenzhen Liu Itamar Elhanany Department of Electrical & Computer Engineering University of Tennessee Knoxville TN USA

This paper presents a framework for obtaining an optimal policy in model-free partially observable Markov decision problems (POMDPs) using a recurrent neural network (RNN), A Q-function approximation approach is taken, utilizing a novel RNN architecture with computation and storage requirements that are dramatically reduced when compared to existing schemes. A scalable online training algorithm, derived from the real-time recurrent learning (RTRL) algorithm, is employed. Moreover, stochastic meta-descent (SMD), an adaptive step size scheme for stochastic gradient-descent problems, is utilized as means of incorporating curvature information to accelerate the learning process. We consider case studies of POMDPs where state information is not directly available to the agent. Particularly, we investigate scenarios in which the agent receives identical observations for multiple states, thereby relying on temporal dependencies captured by the RNN to obtain the optimal policy, Simulation results illustrate the effectiveness of the approach along with substantial improvement in convergence rate when compared to existing schemes

关键词： Recurrent neural networks Neurons Stochastic processes Nonlinear dynamical systems Computational complexity Dynamic programming Learning Computer networks Computer architecture Acceleration

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Transistor channel dendrites implementing HMM classifiers

Transistor channel dendrites implementing HMM classifiers

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IEEE international symposium on Circuits and systems (ISCAS)

作者： Paul Hasler Scott Kozoil Ethan Farquhar Arindam Basu Georgia Institute of Technology Atlanta GA USA University of Tennessee Knoxville TN USA

Recently the authors presented transistor channel models of biological channels and the resulting implementation towards building spiking nodes, synapses, and dendrites. The authors also discussed how to build reconfigurable dendrites using programmable analog techniques. With all of this technology components available, the authors begin to address the question of the computation model possible using a dendrite element, as well as a network of dendrite elements. The authors discuss the connection between a dendrite element and a hidden Markov model (HMM) classifier branch, as well as a network of dendrites and somas to create an HMM classifier typical of what is used in speech recognition systems. The authors present simulation and experimental results for the branch elements; the authors also present initial results for a small dendrite based classifier structure to show the similarities to the HMM paradigm.

关键词： Hidden Markov models Speech recognition Biological system modeling Analog computers Integrated circuit modeling Computational efficiency Probability Dynamic programming Biology computing Computer networks

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Adapting Futures: Scalability for Real-World Computing

Adapting Futures: Scalability for Real-World Computing

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Real-Time systems symposium (RTSS)

作者： Johannes Helander Risto Serg Margus Veanes Pritam Roy Microsoft Research Redmond USA Tallinn University of Technology Estonia University of California Santa Cruz USA

Creating robust real-time embedded software is critical in combining the physical world with computing, such as in consumer electronics or robotics. One challenge is the complexity of dealing with time together with implementation details that often end up implicitly determining the temporal behavior of the program. In this paper we suggest deconstructing a program into two separate aspects, the functional implementation and a temporal pattern, each expressed separately in a different language. This separation enables independent specification, analysis and prediction of the temporal behavior without regard to the implementation. Meanwhile the implementation is optimized for platforms with different capabilities through a scalable programming model that automatically adapts the execution to the level of concurrency a platform can support. Finally the aspects are put together to create a working system. This paper presents the use of futures and partitures to achieve predictability and performance in embedded systems. A new real-time scheduler for partiture based futures execution is introduced, along with multiple implementations, including one for an 8-bit microcontroller. The paper explains how to create, model, and execute futures and partitures.

关键词： Scalability Robustness Embedded software Embedded computing Physics computing Consumer electronics Robots Automatic programming Concurrent computing Embedded system

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Model of Change Request Generator Integrated into Business Application

Model of Change Request Generator Integrated into Business A...

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international symposium on Intelligent systems and Informatics (SISY)

作者： Zeljko Stojanov Technical Faculty Mihajlo Pupin Zrenjanin Serbia

Change must be observed as a basic property of software life cycle. The process of change is initialized with change request. One of the main problems in managing change process is handling change requests specified by customers after software delivery. Customers change requests are usually submitted via developers' web site. This paper presents new approach where change request is generated at customer side with a help of change request generator. The model of presented change request generator contains three views: model of application that is capable to integrate with change request generator, model of change request generator itself and model of generated change request. Generator specifies change request in XML format and sends it to developers' site via HTTP.

关键词： Object oriented modeling Software maintenance Application software Unified modeling language Software architecture programming Software systems Software standards Computer architecture Software debugging

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A Profile for Safety Critical Java

A Profile for Safety Critical Java

引用

international symposium on Object-Oriented Real-Time Distributed Computing

作者： Martin Schoeberl Hans Sondergaard Bent Thomsen Anders P. Ravn Institute of Computer Engineering University of Technology Vienna Austria Vitus Bering Denmark University College Horsens Denmark Department of Computer Science University of Aalborg Aalborg Denmark

We propose a new, minimal specification for real-time Java for safety critical applications. The intention is to provide a profile that supports programming of applications that can be validated against safety critical standards such as DO-178B (1992). The proposed profile is in line with the Java specification request JSR-302: Safety Critical Java Technology, which is still under discussion. In contrast to the current direction of the expert group for the JSR-302 we do not subset the rather complex Real-Time Specification for Java (RTSJ). Nevertheless, our profile can be implemented on top of an RTSJ compliant JVM

关键词： Safety Java Middleware Application software Yarn programming profession Logic Standards development Real time systems Embedded system

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Cascaded Formulation of the Fundamental Polytope of General Linear Block Codes

Cascaded Formulation of the Fundamental Polytope of General ...

引用

IEEE international symposium on Information Theory

作者： Kai Yang Xiaodong Wang Jon Feldman Department of E.E Columbia University NY USA Google New York NY USA

ISBN: (纸本)9781424413973;1424413974

We propose a new linear programming formulation for the decoding of general linear block codes. Different from the original formulation given by J. Feldman (2003), the number of total variables to characterize a parity-check constraint in our formulation is less than twice the degree of the corresponding check node. The equivalence between our new formulation and the original formulation is proven. Moreover, we show that any fundamental polytope is simply the intersection of a group of so-called minimum polytopes. Based on this, we propose a branch-and-bound method to compute a non-trivial lower bound to the minimum distance of a linear block code with affordable complexity.

关键词： Block codes Iterative decoding Linear code Parity check codes Linear programming Iterative algorithms Sum product algorithm Maximum likelihood estimation Large-scale systems Error correction codes

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