Setup Times
Mostrando 1-12 de 42 artigos, teses e dissertações.
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1. IEEE 802.11b/g Practical Assessment Using a Low-Cost Quasi-Yagi Rectenna for Indoor RF Energy Harvesting
Abstract This article presents an experimental analysis of the use of signals transmitted by Wireless Local Area Networks (WLAN) based on the IEEE 802.11b/g standards for Radio Frequency Energy Harvesting (RFEH) applications in indoor environments employing a Quasi-Yagi Rectenna (QYR) topology. This analysis is a crucial point to distinguish the use of the I
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-03
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2. ANALYSIS OF MIXED INTEGER PROGRAMMING FORMULATIONS FOR SINGLE MACHINE SCHEDULING PROBLEMS WITH SEQUENCE DEPENDENT SETUP TIMES AND RELEASE DATES
ABSTRACT The scheduling of jobs over a single machine with sequence dependent setups is a classical problem setting that appears in many practical applications in production planning and logistics. In this work, we analyze six mixed-integer formulation paradigms for this classical context considering release dates and two objective functions: the total weigh
Pesqui. Oper.. Publicado em: 09/05/2019
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3. Rubbing time and bonding performance of one-step adhesives to primary enamel and dentin
Abstract Objectives: This study investigated whether increasing the concentration of acidic monomers in one-step adhesives would allow reducing their application time without interfering with the bonding ability to primary enamel and dentin. Material and methods: Experimental one-step self-etch adhesives were formulated with 5 wt% (AD5), 20 wt% (AD20), or
J. Appl. Oral Sci.. Publicado em: 2017-10
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4. EXPERIMENTAL APPROACH TO ASSESS EVAPORATIVE COOLING UNDER FORCED AIR FLOW
Abstract Air blast is one of the most employed industrial chilling methods. It can be enhanced, i.e., increasing heat transfer and reducing cooling time, by superficial evaporative phenomena. This work reports a methodology, including experimental setup and mathematical modelling, to quantify the air chilling enhancement by wetting the surface of the object
Braz. J. Chem. Eng.. Publicado em: 2017-01
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5. Benjamin Cohen on global political order: when Keynes meets realism - and beyond
Abstract This article analyses the trajectory of Benjamin J. Cohen's work by focusing on his ongoing concern with the nature and governance of world order. It does so by playing out his debt to realism and to Keynesianism. In a first moment, Cohen criticises the economic determinism of dependency scholarship, while turning to political realism, and then to p
Contexto int.. Publicado em: 2015-12
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6. On the Welfare Costs of Business-Cycle Fluctuations and Economic-Growth Variation in the 20th Century
Lucas(1987) has shown a surprising result in business-cycle research: the welfare cost of business cycles are very small. Our paper has several original contributions. First, in computing welfare costs, we propose a novel setup that separates the effects of uncertainty stemming from business-cycle uctuations and economic-growth variation. Second, we extend
Escola de Pós-Graduação em Economia da FGV. Publicado em: 17/10/2012
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7. Proposta de um modelo em programação linear para a solução de problemas de sistemas produtivos job shop com setup dependentes da sequência / Proposal of a linear programming model for solving problem systems job shop production with setup times sequence-dependent
Sequencing problems are very common, they happen every time there is a choice regarding the order in which several tasks can be performed. The business can be an airline, a hotel, a computer manufacturer or a university; these issues are part of their routine. The application of the sequencing techniques allows, for example, reducing the costs and fastening
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/04/2012
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8. On the Welfare Costs of Business-Cycle Fluctuations and Economic-Growth Variation in the 20th Century
Lucas (1987) has shown a surprising result in business-cycle research: the welfare cost of business cycles are very small. Our paper has several original contributions. First, in computing welfare costs, we propose a novel setup that separates the effects of uncertainty stemming from business-cycle fluctuations and economic-growth variation. Second, we exten
Escola de Pós-Graduação em Economia da FGV. Publicado em: 28/02/2012
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9. SINGLE MACHINE SCHEDULING PROBLEM WITH SEQUENCE DEPENDENT SETUP TIMES, WITH EARLINESS AND TARDINESS PENALTIES: A CASE STUDY IN A MACHINING PROCESS / O PROBLEMA DO SEQUENCIAMENTO EM UMA ÚNICA MÁQUINA, COM TEMPOS DE PREPARAÇÃO DEPENDENTES DA SEQUÊNCIA E PENALIDADES POR ANTECIPAÇÃO E ATRASO: ESTUDO DE CASO DE UM PROCESSO DE FABRICAÇÃO POR USINAGEM
A dissertação estuda o problema do sequenciamento de uma única máquina com tempos de preparação dependentes da sequência da produção e penalidades por antecipação e atraso. Ilustra um método com uma aplicação a um exemplo de processo de fabricação por usinagem. Dessa forma, pretende-se reunir as metodologias de resolução e os trabalhos exis
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/01/2012
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10. Metaheurísticas para o problema de Flowshop flexível com penalidades de adiantamento e atraso / Metaheuristics for the flexible Flowshop problem with earliness and tardiness penalties
This work deals with the problem of job scheduling in flexible flowshop system with the objective of minimizing the penalties for tardiness and earliness in terms of the job due date. It is considered that all jobs are available for processing in different moments, according to them release times, besides that, there are setup times depending on the sequence
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/08/2011
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11. Heuristic for flow shop sequencing with separated and sequence independent setup times
This paper deals with the permutation flow shop scheduling problem with separated and sequence-independent machine setup times. A heuristic method with the objective of minimizing the total time to complete the schedule is introduced. The proposed heuristic is based on a structural property of this scheduling problem, which provides an upper bound on the idl
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2011-03
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12. Flexible flow line with setup times: heuristic methods / Flexible flow line com tempos de setup: métodos heurísticos
This work addresses the job scheduling on a flexible flow line with separate setup times. According to the literature, this scheduling problem can be considered as a special case of the Flow Shop with multiple machines, where the jobs may skip stages. Two modeled problems have been studied. In the first scheduling problem the setup times are sequence indepen
Publicado em: 2010