Operational Costs
Mostrando 13-24 de 269 artigos, teses e dissertações.
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13. Mechanical Properties Analysis of Al2024 alloy Submitted to Different Aging Time and different Cold Plastic Deformation degree
Brazilian aeronautical industries report that, due to the high mechanical properties presented commercially, AA2024-T351 alloy presents fissures and non-homogeneous deformations during the mechanical processing. This work proposes a manufacturing process capable of increasing the ductility of the material to withstand tensions during processing and a subsequ
Mat. Res.. Publicado em: 10/07/2019
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14. HPGR as alternative to fused alumina comminution route: an assessment of circuit simplification potential
Abstract A considerable portion of energy consumption and, as a consequence, operational costs in mineral processing, is associated with comminution. High Pressure Grinding Rolls (HPGR) are appealing for their energy efficiency and resulting lower operating costs. This article evaluates this technology as an alternative to the conventional fused alumina comm
REM, Int. Eng. J.. Publicado em: 19/06/2019
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15. Mine fleet cost evaluation - Dijkstra's optimized path
Abstract The transport distance in a mining operation strongly influences a mine operation revenue and its operational cycle because it is a fundamental part of the total mining costs. Generally, the transport route is determined based on an engineer's practical knowledge, which does not consider any mechanism to optimize the possible routes to be taken. In
REM, Int. Eng. J.. Publicado em: 2019-06
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16. NPV analysis of multiple surface constraints for pit expansion scenarios under geological uncertainty
Abstract To optimize a mining project, it is necessary to deal with several technical aspects and constraints, such as orebody modelling, reserve estimation, blending strategy, optimal and operational pit designs, cost control, environmental issues, among others. In this sense, locating surface infrastructures is one of the most critical mine planning concer
REM, Int. Eng. J.. Publicado em: 2019-06
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17. Pre-concentration potential evaluation for a silicate zinc ore by density and sensor-based sorting methods
Abstract Pre-concentration consists of the preliminary discarding of a fraction of the mineral processing plant feed which contains little or none of the mineral of interest, reducing the mass to be processed in downstream operations (e.g. milling, concentration and dewatering), as well as the capital and operational costs. In this context, this study invest
REM, Int. Eng. J.. Publicado em: 2019-06
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18. Head loss in laser-perforated thin-walled polyethylene pipes for irrigation
RESUMO Para reduzir custos fixos e operacionais em sistemas de irrigação pressurizados são produzidos tubos de polietileno com pequena espessura de parede, com orifícios de descarga perfurados a laser, que operam a baixas pressões (até 100 kPa). A caracterização hidráulica desses materiais é essencial para o dimensionamento dos sistemas de irrigaç
Rev. bras. eng. agríc. ambient.. Publicado em: 06/05/2019
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19. ECONOMIC ANALYSIS OF DIFFERENT HYDRAULIC SPRAYERS USED IN SUGARCANE (Saccharum spp.)
ABSTRACT Brazil is the largest sugarcane producer worldwide. In mills, sugarcane crops are sprayed with agrochemicals using self-propelled, tractor-driven, and aerial hydraulic sprayers. As sugarcane spraying is regularly performed over extensive areas, the machinery to be used should be planned and dimensioned to ensure timely operations without overloading
Eng. Agríc.. Publicado em: 25/04/2019
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20. Relacionando níveis de maturidade em gestão ambiental e a adoção de práticas de Green Supply Chain Management: convergência teórica e estudo de múltiplos casos
Resumo Embora as temáticas de níveis de maturidade da gestão ambiental empresarial e a adoção de práticas de GSCM estejam se consolidando, elas percorreram, até o momento, um longo caminho desconectadas, embora ambas tenham sua gênese circunscrita à sustentabilidade empresarial. Buscou-se, por meio de múltiplos casos, a caracterização de um padr
Gest. Prod.. Publicado em: 18/03/2019
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21. Composition of the board of directors and pay-performance sensitivity
RESUMO Este artigo investiga, no mercado de capitais brasileiro, o efeito da composição do conselho de administração na sensibilidade da remuneração dos executivos ao desempenho de mercado, conhecida como pay-performance sensitivity (PPS). Devido aos potenciais conflitos de agência entre acionistas controladores e minoritários e entre acionistas e ge
Rev. contab. finanç.. Publicado em: 2019-03
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22. Business cycles and earnings management strategies: a study in Brazilian public firms,
RESUMO Este estudo contribui para a literatura que trata da influência de fatores macroeconômicos sobre a qualidade das informações contábeis, pois analisa as estratégias de gerenciamento de resultados contábeis das firmas, identificando, especificamente, comportamentos discricionários distintos entre os ciclos econômicos: 1) níveis diferentes de g
Rev. contab. finanç.. Publicado em: 10/01/2019
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23. Simulation-Based Analysis of Additive Manufacturing Systems for Fuel Nozzles
ABSTRACT: Additive manufacturing technologies have the potential to revolutionize manufacturing, allowing for the production of ever more complex products and supporting the creation of strategic competitive advantages to certain industries. Recent investments in additive manufacturing systems show that operational plants are close to become reality. In this
J. Aerosp. Technol. Manag.. Publicado em: 11/10/2018
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24. OPTIMAL LOCATION PROBLEM FOR THE INSTALLATION OF POWER FLOW CONTROLLER
ABSTRACT In power delivery systems, the use of dispersed generation and security control to improve network utilization requires the optimal use of system control devices. The installation of loop controller allows the distribution system to operate in a loop configuration, achieving effective management of voltage and power flow. In the investment planning
Pesqui. Oper.. Publicado em: 2017-09