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Articles de revues sur le sujet « Reconfiguration Time »

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Auteur : Grafiati

Publié le 14 mars 2023

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1

Gharbi, Atef, Hamza Gharsellaoui et Mohamed Khalgui. « Real-Time Reconfigurations of Embedded Control Systems ». International Journal of System Dynamics Applications 5, n^o 3 (juillet 2016) : 71–93. http://dx.doi.org/10.4018/ijsda.2016070104.

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This paper deals with the study of the reconfiguration of embedded control systems with safety following component-based approaches from the functional level to the operational level. The authors define the architecture of the Reconfiguration Agent which is modelled by nested state machines to apply local reconfigurations. They propose in this journal paper technical solutions to implement the whole agent-based architecture, by defining UML meta-models for both Control Components and also agents. To guarantee safety reconfigurations of tasks at run-time, they define service and reconfiguration processes for tasks and use the semaphore concept to ensure safety mutual exclusions. As a method to ensure the scheduling between periodic tasks with precedence and mutual exclusion constraints, the authors apply the priority ceiling protocol.

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Gharsellaoui, Hamza, Mohamed Khalgui et Samir Ben Ahmed. « Reconfiguration of Synchronous Real-Time Operating System ». International Journal of System Dynamics Applications 2, n^o 1 (janvier 2013) : 114–32. http://dx.doi.org/10.4018/ijsda.2013010106.

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Real-time scheduling is the theoretical basis of real-time systems engineering. Earliest Deadline first (EDF) is an optimal scheduling algorithm for uniprocessor real-time systems. The paper deals with Reconfigurable Uniprocessor embedded Real-Time Systems classically implemented by different OS tasks that the authors suppose independent, synchronous and periodic to meet functional and temporal properties described in user requirements. They define two forms of automatic reconfigurations which are applied at run-time: Addition-Remove of tasks or just modifications of their temporal parameters: WCET and/or Periods. The authors define a new semantic of the reconfiguration where a crucial criterion to consider is the automatic improvement of the system’s feasibility at run-time by using an Intelligent Agent that automatically checks the system’s feasibility after any reconfiguration scenario to verify if all tasks meet the required deadlines. To handle all possible reconfiguration solutions, the authors propose an agent-based architecture that applies automatic reconfigurations to re-obtain the system’s feasibility and satisfy user requirements. Therefore, they developed the tool RT-Reconfiguration to support these contributions that they apply on the running example system and the authors apply the Real-Time Simulator, Cheddar to check the whole system behavior and evaluate the performance of the algorithm. They present simulations of this architecture where the agent that implemented is evaluated.

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Li, Ji, Huagang Xiong, Qiao Li, Feng Xiong et Jiaying Feng. « Run-Time Reconfiguration Strategy and Implementation of Time-Triggered Networks ». Electronics 11, n^o 9 (5 mai 2022) : 1477. http://dx.doi.org/10.3390/electronics11091477.

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Time-triggered networks are deployed in avionics and astronautics because they provide deterministic and low-latency communications. Remapping of partitions and the applications that reside in them that are executing on the failed core and the resulting re-routing and re-scheduling are conducted when a permanent end-system core failure occurs and local resources are insufficient. We present a network-wide reconfiguration strategy as well as an implementation scheme, and propose an Integer Linear Programming based joint mapping, routing, and scheduling reconfiguration method (JILP) for global reconfiguration. Based on scheduling compatibility, a novel heuristic algorithm (SCA) for mapping and routing is proposed to reduce the reconfiguration time. Experimentally, JILP achieved a higher success rate compared to mapping-then-routing-and-scheduling algorithms. In addition, relative to JILP, SCA/ILP was 50-fold faster and with a minimal impact on reconfiguration success rate. SCA achieved a higher reconfiguration success rate compared to shortest path routing and load-balanced routing. In addition, scheduling compatibility plays a guiding role in ILP-based optimization objectives and ‘reconfigurable depth’, which is a metric proposed in this paper for the determination of the reconfiguration potential of a TT network.

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Loukil, Sihem, Slim Kallel et Mohamed Jmaiel. « Managing Architectural Reconfiguration at Runtime ». International Journal of Web Portals 5, n^o 1 (janvier 2013) : 55–72. http://dx.doi.org/10.4018/jwp.2013010105.

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Managing dynamic reconfiguration of software systems is a tedious task in the software development because of the substantially increasing need for continuously available systems even at runtime. In particular, the software architecture of dynamically adaptive systems must continuously adapt to varying environmental conditions and user requirements. Therefore, they propose a wide range of possible configurations. The static enumeration of all the possible configurations is a difficult task. Moreover, not all dynamic reconfiguration operations can be foreseen at design time. Some reconfigurations may appear when the system is already deployed. In this context, we propose to combine the Architecture Description Languages and the Aspect-Oriented Software Development paradigm in order to make the dynamic reconfiguration process easier to design, understand and possible to validate. Also, this combination allows to easily evolving the reconfiguration policies even at runtime.

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Marx, Clare. « Time for service redesign ? » Bulletin of the Royal College of Surgeons of England 98, n^o 3 (mars 2016) : 101. http://dx.doi.org/10.1308/rcsbull.2016.101.

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Wanta, Damian, Waldemar T. Smolik, Jacek Kryszyn, Przemysław Wróblewski et Mateusz Midura. « A Run-Time Reconfiguration Method for an FPGA-Based Electrical Capacitance Tomography System ». Electronics 11, n^o 4 (11 février 2022) : 545. http://dx.doi.org/10.3390/electronics11040545.

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A desirable feature of an electrical capacitance tomography system is the adaptation possibility to any sensor configuration and measurement mode. A run-time reconfiguration of a system for electrical capacitance tomography is presented. An original mechanism is elaborated to reconfigure, on the fly, a modular EVT4 system with multiple FPGAs installed. The outlined system architecture is based on FPGA programmable logic devices (Xilinx Spartan) and PicoBlaze soft-core processors. Soft-core processors are used for communication, measurement control and data preprocessing. A novel method of FPGA partial reconfiguration is described, in which a PicoBlaze soft-core processor is used as a reconfiguration controller. Behavioral reconfiguration of the system is obtained by providing run-time access to the program code of a soft-core control processor. The tests using EVT4 hardware and different algorithms for tomographic scanning were performed. A test object was measured using 2D and 3D sensors. The time and resources required for the examined reconfiguration procedure are evaluated.

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Steinhauser, Marco, Martin E. Maier et Benjamin Ernst. « Neural correlates of reconfiguration failure reveal the time course of task-set reconfiguration ». Neuropsychologia 106 (novembre 2017) : 100–111. http://dx.doi.org/10.1016/j.neuropsychologia.2017.09.018.

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Muhammad Ridzuan, Mohd, et Sasa Djokic. « Energy Regulator Supply Restoration Time ». Energies 12, n^o 6 (19 mars 2019) : 1051. http://dx.doi.org/10.3390/en12061051.

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In conventional reliability analysis, the duration of interruptions relied on the input parameter of mean time to repair (MTTR) values in the network components. For certain criteria without network automation, reconfiguration functionalities and/or energy regulator requirements to protect customers from long excessive duration of interruptions, the use of MTTR input seems reasonable. Since modern distribution networks are shifting towards smart grid, some factors must be considered in the reliability assessment process. For networks that apply reconfiguration functionalities and/or network automation, the duration of interruptions experienced by a customer due to faulty network components should be addressed with an automation switch or manual action time that does not exceed the regulator supply restoration time. Hence, this paper introduces a comprehensive methodology of substituting MTTR with maximum action time required to replace/repair a network component and to restore customer duration of interruption with maximum network reconfiguration time based on energy regulator supply requirements. The Monte Carlo simulation (MCS) technique was applied to medium voltage (MV) suburban networks to estimate system-related reliability indices. In this analysis, the purposed method substitutes all MTTR values with time to supply (TTS), which correspond with the UK Guaranteed Standard of Performance (GSP-UK), by the condition of the MTTR value being higher than TTS value. It is nearly impossible for all components to have a quick repairing time, only components on the main feeder were selected for time substitution. Various scenarios were analysed, and the outcomes reflected the applicability of reconfiguration and the replace/repair time of network component. Theoretically, the network reconfiguration (option 1) and component replacement (option 2) with the same amount of repair time should produce exactly the same outputs. However, in simulation, these two options yield different outputs in terms of number and duration of interruptions. Each scenario has its advantages and disadvantages, in which the distribution network operators (DNOs) were selected based on their operating conditions and requirements. The regulator reliability-based network operation is more applicable than power loss-based network operation in counties that employed energy regulator requirements (e.g., GSP-UK) or areas with many factories that required a reliable continuous supply.

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Klimenko, A. B. « A Technique of the Distributed Information Systems Control Method Choice under the High Network Dynamics Conditions ». Proceedings of the Southwest State University 26, n^o 1 (28 juin 2022) : 57–72. http://dx.doi.org/10.21869/2223-1560-2022-26-1-57-72.

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Purpose of research. The purpose of this study is to select a method for managing a distributed system, which, based on known parameters, would reduce the consumption of resources of computing devices. The resource of an information system is understood as the probability of failure-free operation (reliability function), which degrades over time for each node, the faster, the higher its workload.Methods. Considering that with high dynamics of the edge layer of the network, the frequency of system reconfigurations becomes relatively high, and the need for reconfigurations is unpredictable, reducing the total time spent on reconfigurations makes it possible to increase the time spent on solving functional computational problems of the system and thereby reduce the load of nodes. The reconfiguration time can be reduced both by reducing the time for detecting a failure in a distributed system, and by reducing the new configuration forming time. In this paper, a method for reducing the time of the failure detection is considered. The analysis of the applicability of system control methods (centralized, with a distributed leader, decentralized) is based on the obtained analytical estimates of the time the system detects a failure under control conditions using one method or another. A numerical experiment makes it possible to identify areas of system parameters, where it is preferable to use the method with a distributed leader.Results. The main result of this work is a methodology for choosing a method for managing distributed information systems in conditions of high dynamics of the network infrastructure, focused on reducing the consumption of resources of computing devices.Conclusion. System reconfiguration time can be shortened by choosing the most appropriate control method. Thus, the time allotted for solving the functional tasks of the application increases, the workload of the computational nodes decreases, and, therefore, the FBG values increase over the planning horizon.

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Grethlein, J. « The Narrative Reconfiguration of Time beyond Ricoeur ». Poetics Today 31, n^o 2 (25 mai 2010) : 313–29. http://dx.doi.org/10.1215/03335372-2009-022.

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Garcia-Valls, Marisol, Pablo Basanta-Val et Iria Estevez-Ayres. « Real-time reconfiguration in multimedia embedded systems ». IEEE Transactions on Consumer Electronics 57, n^o 3 (août 2011) : 1280–87. http://dx.doi.org/10.1109/tce.2011.6018885.

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Ajorlou, Amir, Kaveh Moezzi, Amir G. Aghdam et Sergey G. Nersesov. « Two-stage time-optimal formation reconfiguration strategy ». Systems & ; Control Letters 62, n^o 6 (juin 2013) : 496–502. http://dx.doi.org/10.1016/j.sysconle.2013.02.001.

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Bourennane, E., C. Milan, M. Paindavoine et S. Bouchoux. « Real Time Image Rotation Using Dynamic Reconfiguration ». Real-Time Imaging 8, n^o 4 (août 2002) : 277–89. http://dx.doi.org/10.1006/rtim.2002.0274.

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Kulkarni, Amit, et Dirk Stroobandt. « How to Efficiently Reconfigure Tunable Lookup Tables for Dynamic Circuit Specialization ». International Journal of Reconfigurable Computing 2016 (2016) : 1–12. http://dx.doi.org/10.1155/2016/5340318.

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Dynamic Circuit Specialization is used to optimize the implementation of a parameterized application on an FPGA. Instead of implementing the parameters as regular inputs, in the DCS approach these inputs are implemented as constants. When the parameter values change, the design is reoptimized for the new constant values by reconfiguring the FPGA. This allows faster and more resource-efficient implementation but investigations have shown that reconfiguration time is the major limitation for DCS implementation on Xilinx FPGAs. The limitation arises from the use of inefficient reconfiguration methods in conventional DCS implementation. To address this issue, we propose different approaches to reduce the reconfiguration time drastically and improve the reconfiguration speed. In this context, this paper presents the use of custom reconfiguration controllers and custom reconfiguration software drivers, along with placement constraints to shorten the reconfiguration time. Our results show an improvement in the reconfiguration speed by at least a factor 14 by using Xilinx reconfiguration controller along with placement constraints. However, the improvement can go up to a factor 40 with the combination of a custom reconfiguration controller, custom software drivers, and placement constraints. We also observe depreciation in the system’s performance by at least 6% due to placement constraints.

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Yang, Jinho, Yoo Ho Son, Donggun Lee et Sang Do Noh. « Digital Twin-Based Integrated Assessment of Flexible and Reconfigurable Automotive Part Production Lines ». Machines 10, n^o 2 (21 janvier 2022) : 75. http://dx.doi.org/10.3390/machines10020075.

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The manufacturing industry has witnessed rapid changes, including unpredictable product demand, diverse customer requirements, and increased pressure to launch new products. To deal with such changes, the reconfigurable manufacturing system has been proposed as one of the advanced manufacturing systems that is close to the realisation of smart manufacturing since it is able to reconfigure its hardware, software, and system structures in a much quicker manner. Conventional simulation technologies lack convergence with physical manufacturing systems, and reconfigurable manufacturing lines require the manual construction of production line models for each reconfiguration. This study presents a digital twin-based integrated reconfiguration assessment application that synchronises with real-time manufacturing data and provides accurate, automated simulation functionality to build and analyse a manufacturing system. The paper discusses the architectural design and implementation of the application, an information model, and an assessment model that enable quantitatively assessment on reconfigurations of manufacturing systems from various aspects. The effectiveness of the proposed application is verified via application to an automotive parts production line to assess the reconfiguration indicators of the manufacturing system under different scenarios. The results reveal that the proposed application provides faster and more accurate reconfiguration assessments compared to existing methods. The findings of this study are expected to facilitate accurate and consistent decision making for evaluating the various indicators of production line performance.

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Politanskyi, Ruslan, et Andrij Veryga. « TIME INTERVAL SWITCHING DEVICE ». Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska 10, n^o 1 (30 mars 2020) : 12–15. http://dx.doi.org/10.35784/iapgos.908.

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The proposed electronic switching device, which is a replacement (analogue) of the electromechanical switch KEP-12. The status and time settings are set for each channel separately through the device menu. It is characterized by less time and ease of reconfiguration.

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Sultana, Bushra, Anees Ullah, Arsalan Ali Malik, Ali Zahir, Pedro Reviriego, Fahad Bin Muslim, Nasim Ullah et Waleed Ahmad. « VR-ZYCAP : A Versatile Resourse-Level ICAP Controller for ZYNQ SOC ». Electronics 10, n^o 8 (9 avril 2021) : 899. http://dx.doi.org/10.3390/electronics10080899.

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Hybrid architectures integrating a processor with an SRAM-based FPGA fabric—for example, Xilinx ZynQ SoC—are increasingly being used as a single-chip solution in several market segments to replace multi-chip designs. These devices not only provide advantages in terms of logic density, cost and integration, but also provide run-time in-field reconfiguration capabilities. However, the current reconfiguration capabilities provided by vendor tools are limited to the module level. Therefore, incremental run-time configuration memory changes require a lengthy compilation time for off-line bitstream generation along with storage and reconfiguration time overheads with traditional vendor methodologies. In this paper, an internal configuration access port (ICAP) controller that provides a versatile fine-grain resource-level incremental reconfiguration of the programmable logic (PL) resources in ZynQ SoC is presented. The proposed controller implemented in PL, called VR-ZyCAP, can reconfigure look-up tables (LUTs) and Flip-Flops (FF). The run-time reconfiguration of FF is achieved through a reset after reconfiguration (RAR)-featured partial bitstream to avoid the unintended state corruption of other memory elements. Along with versatility, our proposed controller improves the reconfiguration time by 30 times for FFs compared to state-of-the-art works while achieving a nearly 400-fold increase in speed for LUTs when compared to vendor-supported software approaches. In addition, it achieves competitive resource utilization when compared to existing approaches.

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Antoni, L., R. Leveugle et B. Feher. « Using run-time reconfiguration for fault injection applications ». IEEE Transactions on Instrumentation and Measurement 52, n^o 5 (octobre 2003) : 1468–73. http://dx.doi.org/10.1109/tim.2003.817144.

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Skorin-Kapov, Nina, Ricardo Santos, Hakim Ghazzai et Andreas Kassler. « A Randomized Greedy Heuristic for Steerable Wireless Backhaul Reconfiguration ». Electronics 10, n^o 4 (10 février 2021) : 434. http://dx.doi.org/10.3390/electronics10040434.

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In this paper, we consider the reconfiguration of wireless backhaul networks with mechanically steerable antennas in the presence of changing traffic demands. Reconfiguration requires the scheduling and coordination of several operations, including antenna alignment and link establishment/removal, with minimal disruption to existing user traffic. Previously, we proposed a Mixed Integer Linear Program (MILP) to orchestrate such reconfiguration with minimal packet loss. While the MILP solves the problem optimally for a limited number of discrete reconfiguration time slots, it does not scale well. In this paper, we propose an iterative randomized greedy algorithm to obtain suboptimal solutions in reduced time. The algorithm schedules the reconfiguration of wireless links by ranking them according to a set of attributes with associated weights and selecting them according to a randomized greedy function. Results on six different network scenarios indicate that the proposed algorithm can achieve good quality solutions in significantly less time. Furthermore, by extending the reconfiguration time beyond the maximum number of time slots solvable by the MILP, the proposed heuristic can obtain superior solutions for some problem instances. The number of iterations of the algorithm can be tuned for its applicability in both offline and online planning scenarios.

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Klimenko, А. B. « Choosing Methodology of How to Manage Distributed Information Systems under Conditions of High Dynamics of Network Infrastructure ». Proceedings of the Southwest State University 25, n^o 3 (29 janvier 2022) : 136–51. http://dx.doi.org/10.21869/2223-1560-2021-25-3-136-151.

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Purpose of research. is to identify a distributed system control method that, based on known parameters, would reduce the resource consumption of computing devices. An information system resource is probability of failure-free operation (FFO), which decreases over time for each node, the faster the higher its load.Methods. Frequency of system reconfiguration becomes relatively high with high dynamics of edge layer of a network and the need for reconfiguration is unpredictable. Reducing the total time spent on reconfiguration allows to increase time spent on solving functional computing tasks of the system and thereby reducing nodes load. Reconfiguration time can be reduced both by reducing failure detection time in distributed system and by reducing searching time for new configuration. A method for reducing failure detection time is described. The applicability analysis of system management methods (centralized, distributed leader, decentralized) is carried out on the basis of obtained analytical evaluations of failure detection time by the system in control conditions through one or another method. A numerical experiment allows to distinguish areas of system parameters, where it is preferable to use the method with a distingods. Frequency of system reconfiguration becomes relatively high with high dynamics of edge layer of a network and the need for reconfiguration is unpredictable. Reducing the total time spent on reconfiguration allows to increase time spent on solving functional computing tasks of the system and thereby reducing nodes load. Reconfiguration time can be reduced both by reducing failure detection time in distributed system and by reducing searching time for new configuration. A method for reducing failure detection time is described. The applicability analysis of system management methods (centralized, distributed leader, decentralized) is carried out on the basis of obtained analytical evaluations of failure detection time by the system in control conditions through one or another method. A numerical experiment allows to distinguish areas of system parameters, where it is preferable to use the method with a distinuished leader.Results. The main result of this work is a method of choosing how to manage distributed information systems in conditions of high dynamics of network infrastructure, focused on reducing of resource consumption in computing devices.Conclusion. The system reconfiguration time could be reduced by selecting the most appropriate control method. In this case, the time for solving functional tasks of application is increased, the workload of computing nodes is reduced, and therefore FFO values are increased over the planning horizon.

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Wang, Weixun, Prabhat Mishra et Ann Gordon-Ross. « Dynamic Cache Reconfiguration for Soft Real-Time Systems ». ACM Transactions on Embedded Computing Systems 11, n^o 2 (juillet 2012) : 1–31. http://dx.doi.org/10.1145/2220336.2220340.

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Masteri, K., et B. Venkatesh. « Real-time smart distribution system reconfiguration using complementarity ». Electric Power Systems Research 134 (mai 2016) : 97–104. http://dx.doi.org/10.1016/j.epsr.2016.01.004.

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Panainte, Elena Moscu, Koen Bertels et Stamatis Vassiliadis. « Interprocedural Compiler Optimization for Partial Run-Time Reconfiguration ». Journal of VLSI signal processing systems for signal, image and video technology 43, n^o 2-3 (juin 2006) : 161–72. http://dx.doi.org/10.1007/s11265-006-7268-0.

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Ramacher, René, et Lars Mönch. « Time-sensitive service reconfiguration : a model-based approach ». International Journal of Business Process Integration and Management 6, n^o 4 (2013) : 312. http://dx.doi.org/10.1504/ijbpim.2013.059137.

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Balashov, Vasily V., Valery A. Kostenko et Tatiana I. Ermakova. « Design of Onboard Real-Time Networks Based on SDN Technology ». Modeling and Analysis of Information Systems 26, n^o 1 (15 mars 2019) : 23–38. http://dx.doi.org/10.18255/1818-1015-2019-1-23-38.

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Modern onboard equipment complexes (OEC) utilize AFDX and FC-AE-ASM-RT switched networks implementing a virtual link-based approach to real-time data transfer. The main drawback of these networks is their limited or absent support for dynamic reconfiguration of virtual links, which makes impossible the dynamical recomposition of OEC operation modes, particularly in case of multiple equipment failures. To remove these drawbacks, in this paper an approach is proposed to use software-defined networks (SDN) as onboard real-time networks. The proposed approach is based on implementation of a virtual link-based technology (similar to those used in AFDX and FC-AE-ASMRT) in an SDN supporting OpenFlow 1.3 protocol. The approach was implemented as a functional prototype and experimentally evaluated in a virtual network environment based on Ofsoftswitch13 software SDN switches and RUNOS controller. The experiments indicated that the proposed data exchange scheme allows the transfer of messages within the given limits on delay and jitter, and does not allow violation of constraints on a virtual link bandwidth. The experiments also confirmed that dynamic reconfiguration of virtual links in SDN does not interrupt the data transfer through unchanged virtual links. An important direction for future work is development of algorithms for dynamic creation of virtual link routes in course of OEC reconfiguration. The final goal of the work is to create an SDN-based network technology supporting both real-time data transfer and automatic network reconfiguration in case of OEC mode change, including parrying multiple failures.

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Sokolova, Ju S. « Increasing of on-board radar system reliability with use of failure detection and reconfiguration system ». Issues of radio electronics, n^o 3 (26 avril 2020) : 6–10. http://dx.doi.org/10.21778/2218-5453-2020-3-6-10.

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The paper considers the possibility of improving the reliability of the on-board radar system by implementation of failures detection and reconfiguration system, as well as predicting and searching of failure locations up to the specified depth of failure search in real time, failures prediction by introducing into the system of pre-failure states of normalized parameters of on-board radar system components. The reconfiguration methods or partially restoring of the antenna phased array by failures generation and loading them into the detection system and reconfiguration of amplitude-phase distributions of emitters or the matrix of a new amplitude-phase distribution in real time are considered. The block diagram, description and operating principle of the fault detection and reconfiguration system are presented. The algorithm of the failure detection and reconfiguration system is given.

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Sui, Jia Yin, Ying Nan Wang et Zhe Ren. « The Distribution Network Reconfiguration Based on Spatial Data Mining ». Applied Mechanics and Materials 427-429 (septembre 2013) : 2748–51. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.2748.

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Distribution network reconfiguration is one of the essential functions of the DMS system; it can be attributed to a number of constraints of large-scale nonlinear combinatorial optimization problem in mathematics. The characteristic of load change of time and space will affect the results of load forecasting. Distribution network reconfiguration relies on the load forecasting results. This paper proposes the more realistic distribution reconfiguration scheme based on the GIS system with space information through spatial data mining. For the real-time and efficiency of effective assurance data, the interface design in GIS system and distribution automation system are also proposed. The geographical information and real-time information are connected seamlessly, so that this two system information is highly unified. The solution can provide the data basis for distribution reconfiguration scheme accurately, and improve power supply reliability of distribution network. It shows that through the example: GIS based on the spatial data mining can provide load in quantity, time, space prediction for the deeper research of distribution network reconfiguration.

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Yoon, Iljung, Heewon Joung et Jooheung Lee. « Zynq-Based Reconfigurable System for Real-Time Edge Detection of Noisy Video Sequences ». Journal of Sensors 2016 (2016) : 1–9. http://dx.doi.org/10.1155/2016/2654059.

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We implement Zynq-based self-reconfigurable system to perform real-time edge detection of 1080p video sequences. While object edge detection is a fundamental tool in computer vision, noises in the video frames negatively affect edge detection results significantly. Moreover, due to the high computational complexity of 1080p video filtering operations, hardware implementation on reconfigurable hardware fabric is necessary. Here, the proposed embedded system utilizes dynamic reconfiguration capability of Zynq SoC so that partial reconfiguration of different filter bitstreams is performed during run-time according to the detected noise density level in the incoming video frames. Pratt’s Figure of Merit (PFOM) to evaluate the accuracy of edge detection is analyzed for various noise density levels, and we demonstrate that adaptive run-time reconfiguration of the proposed filter bitstreams significantly increases the accuracy of edge detection results while efficiently providing computing power to support real-time processing of 1080p video frames. Performance results on configuration time, CPU usage, and hardware resource utilization are also compared.

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Hoffman, John C., et Marios S. Pattichis. « A High-Speed Dynamic Partial Reconfiguration Controller Using Direct Memory Access Through a Multiport Memory Controller and Overclocking with Active Feedback ». International Journal of Reconfigurable Computing 2011 (2011) : 1–10. http://dx.doi.org/10.1155/2011/439072.

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Dynamically reconfigurable computing platforms provide promising methods for dynamic management of hardware resources, power, and performance. Yet, progress in dynamically reconfigurable computing is fundamentally limited by the reconfiguration time overhead. Prior research in the development of dynamic partial reconfiguration (DPR) controllers has been limited by its use of the Processor Local Bus (PLB). As a result, the bus was unavailable during DPR. This resulted in significant time overhead. To minimize the overhead, we introduce the use of a multiport memory controller (MPMC) that frees the PLB during the reconfiguration process. The processor is thus allowed to switch to other tasks during the reconfiguration operation. This effectively limits the reconfiguration overhead. An interrupt is used to inform the processor when the operation is complete. Therefore, the system can multitask during the reconfiguration operation. Furthermore, to maximize performance, we introduce the use of overclocking with active feedback. During overclocking, the use of active feedback is used to ensure that the device voltage and temperature are within nominal operating conditions. All of these contributions lead to significant performance improvements over current partial reconfiguration subsystems. The portability of the system, demonstrated on the Virtex-4 and the Virtex-5, consists of four different hardware platforms.

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Lynch, Brenda, John Browne, Claire Mary Buckley, Orla Healy, Paul Corcoran et Anthony P. Fitzgerald. « An interrupted time-series analysis of the impact of emergency department reconfiguration on regional emergency department trolley numbers in Ireland from 2005 to 2015 ». BMJ Open 9, n^o 9 (septembre 2019) : e029261. http://dx.doi.org/10.1136/bmjopen-2019-029261.

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ObjectivesTo understand the impact of emergency department (ED) reconfiguration on the number of patients waiting for hospital beds on trolleys in the remaining EDs in four geographical regions in Ireland using time-series analysis.SettingEDs in four Irish regions; the West, North-East, South and Mid-West from 2005 to 2015.ParticipantsAll patients counted as waiting on trolleys in an ED for a hospital bed in the study hospitals from 2005 to 2015.InterventionThe system intervention was the reconfiguration of ED services, as determined by the Department of Health and Health Service Executive. The timing of these interventions varied depending on the hospital and region in question.ResultsThree of the four regions studied experienced a significant change in ED trolley numbers in the 12-month post-ED reconfiguration. The trend ratio before and after the intervention for these regions was as follows: North-East incidence rate ratio (IRR) 2.85 (95% CI 2.04 to 3.99, p<0.001), South IRR 0.68 (95% CI 0.51 to 0.89, p=0.006) and the Mid-West IRR 0.03 (95% 1.03 to 2.03, p=0.03). Two of these regions, the South and the Mid-West, displayed a convergence between the observed and expected trolley numbers in the 12-month post-reconfiguration. The North-East showed a much steeper increase, one that extended beyond the 12-month period post-ED reconfiguration.ConclusionsFindings suggest that the impacts of ED reconfiguration on regional level ED trolley trends were either non-significant or caused a short-term shock which converged on the pre-reconfiguration trend over the following 12 months. However, the North-East is identified as an exception due to increased pressures in one regional hospital, which caused a change in trend beyond the 12-month post reconfiguration.

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Peter, Craig I., et Steven D. Johnson. « Doing the twist : a test of Darwin's cross-pollination hypothesis for pollinarium reconfiguration ». Biology Letters 2, n^o 1 (6 septembre 2005) : 65–68. http://dx.doi.org/10.1098/rsbl.2005.0385.

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Mating success in plants depends largely on the efficiency of pollen dispersal. For hermaphrodite plants, self-pollination, either within or among flowers, can reduce mating opportunities because of pollen and ovule discounting and inbreeding depression. Self-pollination may be particularly detrimental in plants such as orchids and asclepiads that package each flower's pollen into one or more pollinia which, together with accessory structures, comprise a pollinarium. Darwin proposed that physical reconfiguration of pollinaria serves as a mechanism for reducing the likelihood of self-pollination. To be effective, the time taken for pollinarium reconfiguration would need to exceed that spent by a pollinator on a plant. We investigated pollinarium reconfiguration (including pollinarium bending, pollinium shrinking and anther cap retention) in 19 species and found a strong positive relationship between reconfiguration time and the duration of pollinator visits. Reconfiguration times were also consistently longer than pollinator visit times. These results provide strong support for Darwin's idea that this mechanism promotes cross-pollination.

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Dondo Gazzano, Julio, Fernando Rincon, Carlos Vaderrama, Felix Villanueva, Julian Caba et Juan Carlos Lopez. « Facilitating Preemptive Hardware System Design Using Partial Reconfiguration Techniques ». Scientific World Journal 2014 (2014) : 1–15. http://dx.doi.org/10.1155/2014/164059.

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In FPGA-based control system design, partial reconfiguration is especially well suited to implement preemptive systems. In real-time systems, the deadline for critical task can compel the preemption of noncritical one. Besides, an asynchronous event can demand immediate attention and, then, force launching a reconfiguration process for high-priority task implementation. If the asynchronous event is previously scheduled, an explicit activation of the reconfiguration process is performed. If the event cannot be previously programmed, such as in dynamically scheduled systems, an implicit activation to the reconfiguration process is demanded. This paper provides a hardware-based approach to explicit and implicit activation of the partial reconfiguration process in dynamically reconfigurable SoCs and includes all the necessary tasks to cope with this issue. Furthermore, the reconfiguration service introduced in this work allows remote invocation of the reconfiguration process and then the remote integration of off-chip components. A model that offers component location transparency is also presented to enhance and facilitate system integration.

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Yang, Dechang, Wenlong Liao, Yusen Wang, Keqing Zeng, Qiuyue Chen et Dingqian Li. « Data-Driven Optimization Control for Dynamic Reconfiguration of Distribution Network ». Energies 11, n^o 10 (1 octobre 2018) : 2628. http://dx.doi.org/10.3390/en11102628.

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To improve the reliability and reduce power loss of distribution network, the dynamic reconfiguration is widely used. It is employed to find an optimal topology for each time interval while satisfying all the physical constraints. Dynamic reconfiguration is a non-deterministic polynomial problem, which is difficult to find the optimal control strategy in a short time. The conventional methods solved complex model of dynamic reconfiguration in different ways, but only local optimal solutions can be found. In this paper, a data-driven optimization control for dynamic reconfiguration of distribution network is proposed. Through two stages that include rough matching and fine matching, the historical cases which are similar to current case are chosen as candidate cases. The optimal control strategy suitable for the current case is selected according to dynamic time warping (DTW) distances which evaluate the similarity between the candidate cases and the current case. The advantage of the proposed approach is that it does not need to solve complex model of dynamic reconfiguration, and only uses historical data to obtain the optimal control strategy for the current case. The cases study shows that the optimization results and the computation time of the proposed approach are superior to conventional methods.

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Baicoianu, Anca. « Exile and Identity Reconfiguration ». Journal of World Literature 3, n^o 1 (16 février 2018) : 10–22. http://dx.doi.org/10.1163/24056480-00301002.

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Abstract This article tackles the experience of exile as described in Norman Manea’s fictional and non-fictional works. My analysis will focus on the relations between language and belonging, as well as on the role of history and memory in the process of identity reconfiguration. The main assumption of this essay is that the shift between reterritorialization and deterritorialization as conditions inflecting the writer’s sense of identity and belonging could provide useful suggestions for a broader investigation concerning the transformations having affected Romanian culture after 1989, while at the same time orienting the discussion towards similar current investigations in a global context.

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Dumitrescu, Emil, Alain Girault, Hervé Marchand et Eric Rutten. « Multicriteria optimal reconfiguration of fault-tolerant real-time tasks ». IFAC Proceedings Volumes 43, n^o 12 (2010) : 356–63. http://dx.doi.org/10.3182/20100830-3-de-4013.00059.

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Harkin, J., T. M. McGinnity et L. P. Maguire. « Modeling and optimizing run-time reconfiguration using evolutionary computation ». ACM Transactions on Embedded Computing Systems 3, n^o 4 (novembre 2004) : 661–85. http://dx.doi.org/10.1145/1027794.1027795.

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Purnaprajna, Madhura, Mario Porrmann, Ulrich Rueckert, Michael Hussmann, Michael Thies et Uwe Kastens. « Runtime Reconfiguration of Multiprocessors Based on Compile-Time Analysis ». ACM Transactions on Reconfigurable Technology and Systems 3, n^o 3 (septembre 2010) : 1–25. http://dx.doi.org/10.1145/1839480.1839487.

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Lach, J., W. H. Mangione-Smith et M. Potkonjak. « Enhanced FPGA reliability through efficient run-time fault reconfiguration ». IEEE Transactions on Reliability 49, n^o 3 (2000) : 296–304. http://dx.doi.org/10.1109/24.914546.

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Chunming Qiao et R. Melhem. « Reconfiguration with time division multiplexed MIN's for multiprocessor communications ». IEEE Transactions on Parallel and Distributed Systems 5, n^o 4 (avril 1994) : 337–52. http://dx.doi.org/10.1109/71.273043.

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Yin, Ziyang, Xingquan Ji, Yumin Zhang, Qi Liu et Xingzhen Bai. « Data-driven approach for real-time distribution network reconfiguration ». IET Generation, Transmission & ; Distribution 14, n^o 13 (3 juillet 2020) : 2450–63. http://dx.doi.org/10.1049/iet-gtd.2019.1733.

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Ortega, Cesar, et Andy Tyrrell. « Biologically Inspired Real-Time Reconfiguration Technique for Processor Arrays ». IFAC Proceedings Volumes 31, n^o 4 (avril 1998) : 217–21. http://dx.doi.org/10.1016/s1474-6670(17)42161-6.

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Ghiasi, Soheil, Ani Nahapetian et Majid Sarrafzadeh. « An optimal algorithm for minimizing run-time reconfiguration delay ». ACM Transactions on Embedded Computing Systems 3, n^o 2 (mai 2004) : 237–56. http://dx.doi.org/10.1145/993396.993398.

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Silva, Miguel L., et João Canas Ferreira. « Support for partial run-time reconfiguration of platform FPGAs ». Journal of Systems Architecture 52, n^o 12 (décembre 2006) : 709–26. http://dx.doi.org/10.1016/j.sysarc.2006.04.004.

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Anthony, Richard John. « A versatile policy toolkit supporting run-time policy reconfiguration ». Cluster Computing 11, n^o 3 (10 juillet 2008) : 287–98. http://dx.doi.org/10.1007/s10586-008-0058-7.

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Bernardon, D. P., A. P. C. Mello, L. L. Pfitscher, L. N. Canha, A. R. Abaide et A. A. B. Ferreira. « Real-time reconfiguration of distribution network with distributed generation ». Electric Power Systems Research 107 (février 2014) : 59–67. http://dx.doi.org/10.1016/j.epsr.2013.09.011.

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Wirthlin, M. J., et B. L. Hutchings. « Improving functional density using run-time circuit reconfiguration [FPGAs] ». IEEE Transactions on Very Large Scale Integration (VLSI) Systems 6, n^o 2 (juin 1998) : 247–56. http://dx.doi.org/10.1109/92.678880.

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Jabr, Rabih A., Izudin Dzafic et Indira Huseinagic. « Real Time Optimal Reconfiguration of Multiphase Active Distribution Networks ». IEEE Transactions on Smart Grid 9, n^o 6 (novembre 2018) : 6829–39. http://dx.doi.org/10.1109/tsg.2017.2724766.

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Shariatzadeh, Farshid, Ceeman B. Vellaithurai, Saugata S. Biswas, Ramon Zamora et Anurag K. Srivastava. « Real-Time Implementation of Intelligent Reconfiguration Algorithm for Microgrid ». IEEE Transactions on Sustainable Energy 5, n^o 2 (avril 2014) : 598–607. http://dx.doi.org/10.1109/tste.2013.2289864.

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Heng Tan et R. F. DeMara. « A Multilayer Framework Supporting Autonomous Run-Time Partial Reconfiguration ». IEEE Transactions on Very Large Scale Integration (VLSI) Systems 16, n^o 5 (mai 2008) : 504–16. http://dx.doi.org/10.1109/tvlsi.2008.917551.

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Hsieh, Ang-Chih, et Ting Ting Hwang. « Run-Time Reconfiguration of Expandable Cache for Embedded Systems ». IEEE Transactions on Very Large Scale Integration (VLSI) Systems 20, n^o 10 (octobre 2012) : 1863–75. http://dx.doi.org/10.1109/tvlsi.2011.2163534.

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