embeddedsystems are becoming ever more pervasive in our society, with most routine daily tasks now involving their use in some form. These devices can range from simple low-cost chips to expensive and complex systems...
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ISBN:
(纸本)9781467364211
embeddedsystems are becoming ever more pervasive in our society, with most routine daily tasks now involving their use in some form. These devices can range from simple low-cost chips to expensive and complex systems and are a major cost driver in the equipment design phase. Therefore reducing this cost by substitution of advanced processors for more simple devices, while retaining reliability, would be beneficial in terms of cost reduction and system flexibility. This paper investigates the simulation of a heuristic based scheduling algorithm for real-time systems capable of managing complex jobs based on an ARM Cortex M3 architecture simulated in MATLAB.
The proceedings contain 63 papers. The special focus in this conference is on Study and Structure of Materials, Mechanics Engineering and systems, computer-Aided Design of Materials and Application, Mechanism Study of...
ISBN:
(纸本)9783037856642
The proceedings contain 63 papers. The special focus in this conference is on Study and Structure of Materials, Mechanics Engineering and systems, computer-Aided Design of Materials and Application, Mechanism Study of Materials, Material Technology and Application. The topics include: Corrosion inhibition effect of PASP and sulfuric acid high cerium on copper in citricacid;adsorption of calcium lignosulphonate water reducer on alkali-activated slag cement pastes;study of PVA on polyester desizing with atmospheric pressure dielectric barrier discharge plasma;study on the mobilities with replaceable linear polyacrylamide (LPA) gel electrophoresis;NbF5 and CrF3 catalysts effects on synthesis and hydrogen storage performance of Mg- Ni-NiO composites;combined diagnosis study for terminal main insulation hole defect in 10kV cross- linked polyethylene cable;coal metamorphism's influence on coalbed N2 concentration in mining area;formation energy calculations of impurity elements at substitutional or interstitial sites in silicon;controller gain design of 2-D linear systems based on the existing 1-D analytical solution;calculation of VaR with the bootstrap method based on experts predict in mechanical engineering;the research on embedded real-time system security issues in mechanical control;the effect of non-normality of navier-stokes operator mechanism on dynamics of an axisymmetric swirling flow;the application of web data mining system model in mechanical engineering;blind source separation for impact force induced by piston slaps in diesel engines;dynamic response analysis of the reinforced concrete column under the effect of explosive impact load;simulation of laser shock wave propagation and dispersion in SHPB;research on the charged omni-directional spatial electric field tester;the research on modeling and dynamic simulation of gear box virtual prototype based on Pro/E and ADAMS;the application of fast and effective shot boundary detection algorithm in mechanical e
Video adaption is one of the main solutions to offer access to the large array of existing multimedia contents and the variety of terminals and networks. This adaptation can be achieved efficiently using transcoding t...
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Video adaption is one of the main solutions to offer access to the large array of existing multimedia contents and the variety of terminals and networks. This adaptation can be achieved efficiently using transcoding techniques. The implementation of the various adaptation possibilities and techniques in embeddedsystems such as home gateway requires flexible and efficient architectures. This paper presents a hardware reconfigurable architecture for the real time adaptation of video contents for different terminals and available bandwidth. This architecture is designed to adapt a compressed stream in advanced video coding standard (H264/AVC) and/or MPEG-2. A system level model of reconfigurable transcoder is developed for IP integration and architectural exploration by taking into account dynamic and partial reconfiguration. The developed simulation model of dynamic partial reconfiguration allowed the early estimation of performances and the design of the suitable solution for the considered transcoding scenarios.
The design of high-performance Multiprocessor systems-on-Chip (MPSoCs) has proven to be an attractive challenge in embeddedsystems design automation. However, the complexity of such designs associated with short time...
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ISBN:
(纸本)9781479913725
The design of high-performance Multiprocessor systems-on-Chip (MPSoCs) has proven to be an attractive challenge in embeddedsystems design automation. However, the complexity of such designs associated with short time-to-market constraints impose serious limitations on the exploration of different configurations and scenarios on the design space exploration. The use of virtual platforms may decrease the time-to-market of these architectures while providing the means to exploit, debug and verify architectures with different features. In this paper, we present the web-based Simplify framework, an interactive approach for MPSoC exploration using an instruction-accurate Open Virtual Platform (OVP). The framework provides an environment to define both software and hardware properties in an intuitive way, and allows designers to validate the functionality as well as the behavior of the modeled architectures at high-abstraction levels. Based on the simulation reports generated from the framework, designers can perform further design modifications and optimizations, and re-validate the whole system in an efficient way, allowing increased design space exploration. For the evaluation of the proposed approach, a set of benchmark applications extracted from MiBench has been used. They run on five different processors (MIPS32, ARM7, OpenRISC (OR1K), PowerPC32 and Micro Blaze) on both mono and multiprocessor architectures and the experiments show considerable simulation speed-ups to obtain application profiling at instruction-level compared to existing approaches based on tracing.
Developing highly efficient and reliable embedded system demands hardware/software *** be high-configurable embeddedsystems,designers seek for transaction-level modeling and component based *** approach employ platfo...
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Developing highly efficient and reliable embedded system demands hardware/software *** be high-configurable embeddedsystems,designers seek for transaction-level modeling and component based *** approach employ platform-based design and component-based design and apply it to a networked sensor *** introduce a multiple-language environment unified component-based model and apply it to co-simulation of sensor system *** case studies demonstrate that our approach is readily applicable to real-world networked sensor systems and reduces the co-simulation complexities.
The current research paper specifies the dynamic reconfiguration of distributed embedded control systems. A reconfiguration is a distributed run-time automatic operation to adapt the system's behaviour to its envi...
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The current research paper specifies the dynamic reconfiguration of distributed embedded control systems. A reconfiguration is a distributed run-time automatic operation to adapt the system's behaviour to its environment. We propose a multi-agent architecture to handle and control all reconfiguration scenarios. In order to specify the defined architecture, we propose a model driven approach based on the concept of Mode of the MARTE profile. Each mode describes a possible behavior of the system for a well-determined environment associated with a software configuration. This approach proposes to model the reconfigurability through the definition of the reconfigurable architectures, the reconfiguration operations and the agents that run these operations within a distributed environment.
Cyber-Physical systems (CPS) involve communication, computation, and control through heterogeneous and widely distributed physical devices and computational components. The close interactions of these systems with the...
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Cyber-Physical systems (CPS) involve communication, computation, and control through heterogeneous and widely distributed physical devices and computational components. The close interactions of these systems with the physical world make it difficult to model and simulate using traditional embedded system modeling and simulation technology. In this paper we address the main technical challenges on system simulation taking into account by the heterogeneity and integration of computation and physical processes characters of CPS, and provide a new interface based simulationmodeling method and its corresponding co-simulation framework. We use Simulink to establish the physical continuous dynamic model, use UML to establish the discrete event-driven model, and then integrate the Simulink model into UML model by code fusion technology to implement co-simulation. A lunar rover example is implemented to validate the proposed method.
This research project deals with the application of dynamic modeling methods for prediction and correction (filtering) of state variables in the calculation of the position and speed training rockets launched at Alcan...
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This research project deals with the application of dynamic modeling methods for prediction and correction (filtering) of state variables in the calculation of the position and speed training rockets launched at Alcantara Launch Center. Initially, an approach is made of the means involved in launching and tracking of rockets, with the purpose of obtaining an understanding of the acquisition of radar signals, which are input of the filter. Then it made an approach of mathematical treatment of the filter dynamic model to obtain the equations used in the prediction and filtering of the rocket trajectory. Finally is made the application of Kalman filter algorithm in LabVIEW (Laboratory Virtual Instrumentation Engineering Workbench) FPGA (Field Programmable Gate Array) to estimate the position and velocity of the rocket. The main contribution of this work is to obtain a gain in processing velocity of Kalman filtering using parallelism at the hardware level, implementing a reconfigurable FPGA architecture, ensuring a platform fast enough for radars with high precision and good tracking capability of rockets.
Self-awareness and self-expression are promising architectural concepts for embeddedsystems to be equipped with to match them with dedicated application scenarios and constraints in the avionic and space-flight indus...
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Self-awareness and self-expression are promising architectural concepts for embeddedsystems to be equipped with to match them with dedicated application scenarios and constraints in the avionic and space-flight industry. Typically, these systems operate in largely undefined environments and are not reachable after deployment for a long time or even never ever again. This paper introduces a reference architecture as well as a novel modelling and simulation environment for self-aware and self-expressive systems with transaction level modelling, simulation and detailed modelling capabilities for hardware aspects, precise process chronology execution as well as fine timing resolutions. Furthermore, industrial relevant system sizes with several self-aware and self-expressive nodes can be handled by the modelling and simulation environment.
Rising concern for thermal stress and tight energy constraints have forced designers to consider power as a design criterion from early design phase. Despite many advances in high-level power estimation techniques, th...
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Rising concern for thermal stress and tight energy constraints have forced designers to consider power as a design criterion from early design phase. Despite many advances in high-level power estimation techniques, there is a lack of generic power estimation capabilities in prominent high-level design flows. In this paper we propose power modeling and estimation techniques during Architecture Description Language (ADL)-based high-level embedded processor design. The first technique is based on accurate switching activity extraction from cycle-accurate instruction-set simulation. The second technique is developed through unit-level power modeling for ADL architecture construct. Multivariate linear regression is used to characterize the unit power model. Experiments are performed on a RISC processor using state-of-the-art high-level processor design flow to demonstrate the accuracy and efficiency of the proposed techniques.
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