Reliability Optimization
Mostrando 13-24 de 74 artigos, teses e dissertações.
-
13. COST-EFFECTIVE BANDWIDTH PROVISIONING IN MICROWAVE WIRELESS NETWORKS UNDER UNRELIABLE CHANNEL CONDITIONS
ABSTRACT Cost-effective planning and dimensioning of backhaul microwave networks under unreliable channel conditions remains a relatively underexplored area in the literature. In particular, bandwidth assignment requires special attention as the transport capacity of microwave links is prone to variations due to, e.g., weather conditions. In this paper, we f
Pesqui. Oper.. Publicado em: 2017-09
-
14. OPTIMIZATION MODEL FOR VEHICLE ROUTING AND EQUIPMENT REPLACEMENT IN FARM MACHINERY
ABSTRACT: An equipment replacement decision takes into account economic engineering models based on discounted cash flow (DCF) such as the Annual Equivalent Cost (AEC). Despite a large number of researches on industrial assets replacement, there is a lack of studies applied to farm goods. This study aimed at assessing an alternative model for economic decisi
Eng. Agríc.. Publicado em: 2017-09
-
15. A Stochastic Reliability Model for Application in a Multidisciplinary Optimization of a Low Pressure Turbine Blade Made of Titanium Aluminide
Abstract Currently, there are a lot of research activities dealing with gamma titanium aluminide (γ-TiAl) alloys as new materials for low pressure turbine (LPT) blades. Even though the scatter in mechanical properties of such intermetallic alloys is more distinctive as in conventional metallic alloys, stochastic investigations on γ -TiAl alloys are very ra
Lat. Am. j. solids struct.. Publicado em: 2016-12
-
16. Non-clinical studies required for new drug development - Part I: early in silico and in vitro studies, new target discovery and validation, proof of principles and robustness of animal studies
This review presents a historical overview of drug discovery and the non-clinical stages of the drug development process, from initial target identification and validation, through in silico assays and high throughput screening (HTS), identification of leader molecules and their optimization, the selection of a candidate substance for clinical development, a
Braz J Med Biol Res. Publicado em: 24/10/2016
-
17. Design Optimization of a Random Suspension Device Considering a Reliability Constraint on the Frequency Response Function
Abstract This work deals with the design of a suspension device, idealized as a spring-mass-damper system. The amplitude of a nominal system is constrained to satisfy certain limitations in a given frequency band and the design is to be done as a reliability-based optimization. This constitutes a major difficulty since the constraint becomes a random process
Lat. Am. j. solids struct.. Publicado em: 2016-06
-
18. DEVELOPMENT OF A HYBRID FUZZY GENETIC ALGORITHM MODEL FOR SOLVING TRANSPORTATION SCHEDULING PROBLEM
ABSTRACT There has been an increasing public demand for passenger rail service in the recent times leading to a strong focus on the need for effective and efficient use of resources and managing the increasing passenger requirements, service reliability and variability by the railway management. Whilst shortening the passengers’ waiting and travelling time
JISTEM J.Inf.Syst. Technol. Manag.. Publicado em: 2015-12
-
19. BUNDLE METHODS IN THE XXIst CENTURY: A BIRD'S-EYE VIEW
Bundle methods are often the algorithms of choice for nonsmooth convex optimization, especially if accuracy in the solution and reliability are a concern. We review several algorithms based on the bundle methodology that have been developed recently and that, unlike their forerunner variants, have the ability to provide exact solutions even if most of the ti
Pesqui. Oper.. Publicado em: 2014-12
-
20. A single loop reliability-based design optimization using EPM and MPP-based PSO
A reliability-based design optimization (RBDO) incorporates a probabilistic analysis with an optimization technique to find a best design within a reliable design space. However, the computational cost of an RBDO task is often expensive compared to a deterministic optimization, which is mainly due to the reliability analysis performed inside the optimization
Lat. Am. j. solids struct.. Publicado em: 2014-10
-
21. Investigation on natural frequency of an optimized elliptical container using real-coded genetic algorithm
This study introduces a method based on real-coded genetic algorithm to design an elliptical shaped fuel tank. This method enhances the advantage of the system such as roll stability, and reduces disadvantages like fluid c.g. height and overturning moment. These parameters corresponding to the elliptical tanks with different filling levels are properly optim
Lat. Am. j. solids struct.. Publicado em: 2014-01
-
22. AUTOMATIC GENERATION USING TOPOLOGIC OPTIMIZATION AND SAFETY ASSESSMENT IN STRUT AND TIE MODELS / GERAÇÃO AUTOMÁTICA VIA OTIMIZAÇÃO TOPOLÓGICA E AVALIAÇÃO DE SEGURANÇA DE MODELOS DE BIELAS E TIRANTES
O projeto de estruturas de concreto armado com a presença de descontinuidades geométricas ou estáticas utilizando o conceito dos modelos de bielas e tirantes tem aumentado muito sua aplicabilidade nos últimos anos. As orientações normativas existentes para esse tipo de projeto parecem, entretanto, ser insuficientes e muitas vezes conservadoras. O prese
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2012
-
23. Reliability-based design optimization strategies based on FORM: a review
In deterministic optimization, the uncertainties of the structural system (i.e. dimension, model, material, loads, etc) are not explicitly taken into account. Hence, resulting optimal solutions may lead to reduced reliability levels. The objective of reliability based design optimization (RBDO) is to optimize structures guaranteeing that a minimum level of r
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-12
-
24. Otimização da programação da manutenção dos ativos de transmissão do sistema elétrico brasileiro considerando penalidades por indisponibilidade, restrições sistêmicas e logística das equipes técnicas / Optimization of maintenance programming of transmission assets of the brazilian electric power system considering penalties for unavailability, systemic constraints and logistics technical teams
Uma empresa de energia elétrica tem por obrigação garantir a continuidade e a qualidade do serviço prestado. A fim de incentivar a qualidade do serviço, a ANEEL introduziu penalidades nos contratos com as concessionárias de serviços públicos de transmissão de energia elétrica caso as instalações de transmissão sejam desligadas, por acidente, fal
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/10/2011