A Stochastic Network Scheduling System For Optimum Resource Utilisation
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An Algorithm for Determining Optimal Resource Allocation in Stochastic Activity Networks
Author | : Adam J Rudolph |
Publisher | : |
Total Pages | : 70 |
Release | : 2008 |
Genre | : |
ISBN | : |
Keywords: activity networks, stochastic optimization, project scheduling, resource allocation, phase type distribution.
Optimal and Robust Scheduling for Networked Control Systems
Author | : Stefano Longo |
Publisher | : CRC Press |
Total Pages | : 280 |
Release | : 2013-03-26 |
Genre | : Technology & Engineering |
ISBN | : 1466569549 |
Optimal and Robust Scheduling for Networked Control Systems tackles the problem of integrating system components—controllers, sensors, and actuators—in a networked control system. It is common practice in industry to solve such problems heuristically, because the few theoretical results available are not comprehensive and cannot be readily applied by practitioners. This book offers a solution to the deterministic scheduling problem that is based on rigorous control theoretical tools but also addresses practical implementation issues. Helping to bridge the gap between control theory and computer science, it suggests that the consideration of communication constraints at the design stage will significantly improve the performance of the control system. Technical Results, Design Techniques, and Practical Applications The book brings together well-known measures for robust performance as well as fast stochastic algorithms to assist designers in selecting the best network configuration and guaranteeing the speed of offline optimization. The authors propose a unifying framework for modelling NCSs with time-triggered communication and present technical results. They also introduce design techniques, including for the codesign of a controller and communication sequence and for the robust design of a communication sequence for a given controller. Case studies explore the use of the FlexRay TDMA and time-triggered control area network (CAN) protocols in an automotive control system. Practical Solutions to Your Time-Triggered Communication Problems This unique book develops ready-to-use engineering tools for large-scale control system integration with a focus on robustness and performance. It emphasizes techniques that are directly applicable to time-triggered communication problems in the automotive industry and in avionics, robotics, and automated manufacturing.
Improving Resource Sharing in Computer Networks with Stochastic Scheduling
Author | : Nataliâ Osipova |
Publisher | : |
Total Pages | : 166 |
Release | : 2009 |
Genre | : |
ISBN | : |
In the current thesis we propose several new contributions to improve the performance of computer networks. The obtained results concern the resource sharing problems in the Internet routers, Web servers and operating systems. We study several stochastic scheduling algorithms which decrease the mean waiting time in the system with efficient resource sharing and provide the possibility to introduce the Quality of Service and flow differentiation to the networks. We show the effectiveness of the proposed algorithms and study the possibility of their implementation in the router queues. The most important obtained results are the following. For the Two Level Processor Sharing scheduling discipline with the hyper-exponential job size distribution with two phases we find an approximation for the optimal value of the threshold that minimizes the expected sojourn time. With the simulation results (NS-2) we show that TLPS improves significantly the system performance when the found approximation of the optimal threshold is used. We study the Discriminatory Processor Sharing policy and show the monotonicity of the expected sojourn time in the system depending on the weight vector under certain conditions on the system. We apply the Gittins optimality result to characterize the optimal scheduling discipline in a multi-class single server queue. The found policy minimizes the mean sojourn time in the system between all non-anticipating scheduling policies. In several cases of practical interest we describe the policy structure and provide the simulation results (NS-2). For the the congestion control problem in the networks we propose a new flow-aware algorithm to improve the fair resource sharing of the bottleneck capacity.
Optimum Choice of Energy System Configuration and Storages for a Proper Match between Energy Conversion and Demands
Author | : Andrea Lazzaretto |
Publisher | : MDPI |
Total Pages | : 362 |
Release | : 2020-01-31 |
Genre | : Technology & Engineering |
ISBN | : 3039280368 |
This Special Issue addresses the general problem of a proper match between the demands of energy users and the units for energy conversion and storage, by means of proper design and operation of the overall energy system configuration. The focus is either on systems including single plants or groups of plants, connected or not to one or more energy distribution networks. In both cases, the optimum design and operation involve decisions about thermodynamic processes, about the type, number, design parameters of components/plants, and storage capacities, and about mutual interconnections and the interconnections with the distribution grids. The problem is absolutely general, encompassing design and operation of energy systems for single houses, groups of houses, industries, industrial districts, municipal areas, regions and countries. The presented papers show that similar approaches can be used in different applications, although a general standard has not been achieved yet.
Introduction to Civil Engineering Systems
Author | : Samuel Labi |
Publisher | : John Wiley & Sons |
Total Pages | : 1060 |
Release | : 2014-04-07 |
Genre | : Technology & Engineering |
ISBN | : 0470530634 |
This book presents an integrated systems approach to the evaluation, analysis, design, and maintenance of civil engineering systems. Addressing recent concerns about the world's aging civil infrastructure and its environmental impact, the author makes the case for why any civil infrastructure should be seen as part of a larger whole. He walks readers through all phases of a civil project, from feasibility assessment to construction to operations, explaining how to evaluate tasks and challenges at each phase using a holistic approach. Unique coverage of ethics, legal issues, and management is also included.