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Computational verb numbers, as a special kind of computational verb, play an important role in designing computational verb gain-scheduling PID controllers. In this paper, computational verb numbers in the form of “computational verb + real number” are used to construct control rules of PID controllers, and a composed computational verb similarity is designed for computational verb reasoning. Simulation...
Cloud computing aims to give users virtually unlimited pay-per-use computing resources without the burden of managing the underlying infrastructure. We claim that, in order to realize the full potential of cloud computing, the user must be presented with a pricing model that offers flexibility at the requirements level, such as a choice between different degrees of execution speed and the cloud provider...
This paper designs an RFID IP core by utilizing FPGA technology, which has advantages of internal task scheduling and high-speed encoding & decoding. The RTL design of base-band communication IP core based on modular method is presented. The RFID simulation model is established and the experiment results show that the proposed communication simulation model has a good performance, and the IP-core...
Based on the analysis on the scheduling characteristics of the semiconductor manufacturing fabrication lines, we propose a TOC(Theory-of-Constraints) combining ACO(Ant Colony Optimization) sequencing method. The method firstly determines the bottlenecks of a semiconductor manufacturing fabrication line, and then applies an ACO algorithm to obtain the optimized jobs processing priority sequence of...
IC testing is carried out in the make-to-order mode upon the testing route arrangement according to clients' demand, without the need for materials. Different testing routes are adopted for the order according to clients' demands or product features. Lin et al. probed into this topic on the assumption that the testing flow for each order is the same and with the logic IC testing as the object for...
In this study, we consider an order promising problem at parallel machine shop where orders arrive dynamically. We develop a real-time due-date quoting method for the problem. In the method, the inventory status of the shop as well as the various scheduling methods used in the shop are taken into account. The quoting needs to be done very fast for the due-date negotiation between sales managers and...
As the number of wireless sensor network applications continues to grow, the need for specialized task scheduling mechanisms, aware of the sensor devices' capabilities and real-time resource availability, is becoming more and more apparent. In this paper, we therefore propose a generic model for task scheduling in heterogeneous networks, which we subsequently use to schedule distributed reasoning...
Despite several attempts to accurately predict duration and cost of projects, simulation models in use are still over simplified and nonrealistic. They often fail to cope with real-life scenarios and uncertainty. In this paper we use the proxel-based simulation method to analyze and predict duration of project schedules exhibiting high uncertainty due to typical on-the-fly human decision behavior...
Aiming for the actual production of carbon enterprises, the optimization problem of master production scheduling in carbon enterprises was studied. With the purpose of minimizing production and inventory costs in planning horizon, the paper established an optimization model of master production scheduling by using the unit time earliness and tardiness penalty of products. The paper proposed the use...
The simulation modeling methods of distribution center have been studied based on AUTOMOD platform. The equipments structural model, behavior model and kinematic model of one distribution center have been built. The researching was focused on the core subsystems of the distribution center, including the typical automated storage/retrieval system (AS/RS), AGV transportation system, an advanced intelligent...
Transmission scheduling is a key design problem in wireless multi-hop networks. Many transmission scheduling algorithms have been proposed to maximize the spatial reuse and minimize the time division multiple access (TDMA) frame length. Most of the scheduling algorithms are topology-dependent. They are generally graph-based and depend on the exact network topology information. Thus, they cannot adapt...
We propose an innovative agile crossbar switch architecture called contention-tolerant crossbar, denoted by CTC(N). Unlike the conventional crossbar and the crossbar with crosspoint buffers, which require complex hardware resolvers to grant one out of multiple output requests, CTC(N) can tolerate output contentions by a pipelining mechanism, with pipeline stages implemented as buffers in input ports...
This paper analyzed the problem faced by a maintenance department of an Information Technology company, which recorded a huge amount of penalty cost each month. The cost is incurred when a service breakdown is solved beyond the agreed-upon duration, as distinctively stated in the Service Level Agreement established with its customers. Therefore, the objective of the paper is to present a workforce...
Network simulator (ns-2) has been accepted as a de facto standard tool for networking research among academicians. Currently, multiple popular queuing and scheduling policies are implemented in ns-2 such as DropTail, Random Early Detection (RED), priority and fair queuing to provide the facility to simulate the network operation. Least Attained Service (LAS) is a preemptive scheduling policy that...
In this paper, scheduling parallel tasks on multiprocessor computers with dynamically variable voltage and speed is addressed as combinatorial optimization problems. Our scheduling problems are defined such that the energy-delay product is optimized by fixing one factor and minimizing the other. It is noticed that power-aware scheduling of parallel tasks has rarely been discussed before. Our investigation...
Multiprocessor task scheduling is a well known NP-hard problem and numerous methods have been proposed to optimally solve it. The objective is makespan minimization, i.e. we want the last task to complete as early as possible. Simulated Annealing (SA) has been considered a very good tool for complex nonlinear optimization problem, such as multiprocessor task scheduling. However, a major disadvantage...
In this paper we evaluate performance of three different site allocation policies in a 2-level computational grid with heterogeneous sites. We consider that schedulers are aware of service demands of jobs which show high variability. A simulation model is used to evaluate performance in terms of the average response time and slowdown, under medium and high load. Simulation results show that the proposed...
If cluster C1 consists of computers with a faster mean speed than the computers in cluster C2, does this imply that cluster C1 is more productive than cluster C2? What if the computers in cluster C1 have the same mean speed as the computers in cluster C2: is the one with computers that have a higher variance in speed more productive? Simulation experiments are performed to explore the above questions...
The growing interest in grids technologies for the solving of large-scale computational problems leads related framework improvement. One of the challenging problems in Grid computing is the efficient resources utilization and allocation of tasks, i.e. scheduling problem. Fuzzy Rule-Based Systems (FRBSs) have recently proved to be a competitive alternative for the development of scheduling systems,...
In a distributed system, gang scheduled parallel jobs are considered as an efficient way of scheduling frequently communicating parallel jobs. This paper studies the performance of scheduling strategies in the case of gangs which are dynamically generated based on precedence constraints with formerly executed gangs. The formation of a secondary gang upon the execution of a preceding gang can be necessary...
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