Multi Level Optimization
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Synthesis of Sparse Arrays Based On CIGA (Convex Improved Genetic Algorithm)
Abstract In this paper, a novel hybrid algorithm on beam pattern synthesis of sparse arrays is proposed, which aims at minimizing the peak sidelobe level (PSLL). Sparse arrays can provide higher spatial resolution and relatively lower sidelobe than general arrays, but it is necessary to solve the multi-constraint problem of nonconvex nonlinear. Thus, we prop
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-12
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2. Multi-Objective Curing Cycle Optimization for Glass Fabric/Epoxy Composites Using Poisson Regression and Genetic Algorithm
In this study, a multi-parameter design of experiments, using Taguchi method, has been conducted in order to investigate the optimum curing conditions for glass fabric/epoxy laminated composites, followed by a statistical analysis and genetic algorithm optimization. Heating rate a, temperature T1 and duration h1 were treated as independent variables in a L25
Mat. Res.. Publicado em: 01/02/2018
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3. Development and optimization of a mixed beverage made of whey and water-soluble soybean extract flavored with chocolate using a simplex-centroid design
Abstract This study aimed to combine the nutritional advantages of whey and soybean by developing a type of chocolate beverage with water-soluble soybean extract dissolved in whey. Different concentrations of thickeners (carrageenan, pectin and starch – maximum level of 500 mg.100 mL-1) were tested by a simplex-centroid design. Several physicochemical, rhe
Food Sci. Technol. Publicado em: 26/10/2017
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4. 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
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5. Topological derivative-based topology optimization of structures subject to multiple load-cases
AbstractThe topological derivative measures the sensitivity of a shape functional with respect to an infinitesimal singular domain perturbation, such as the insertion of holes, inclusions or source-terms. The topological derivative has been successfully applied in obtaining the optimal topology for a large class of physics and engineering problems. In this p
Lat. Am. j. solids struct.. Publicado em: 2015-05
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6. Small Solid Propellant Launch Vehicle Mixed Design Optimization Approach
ABSTRACT: For a small country with limited research budget and lack of advanced space technology, it is imperative to find new approaches for the development of low-cost launch vehicles (LV), which is, among all possibilities, an interesting option for rapid access to space, focused on integration of acquired components complemented with indigenously develop
J. Aerosp. Technol. Manag.. Publicado em: 2014-09
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7. Theoretical Optimal Trajectories for Reducing the Environmental Impact of Commercial Aircraft Operations
ABSTRACT: This work describes initial results obtained from an ongoing research involving the development of optimization algorithms which are capable of performing multi-disciplinary aircraft trajectory optimization processes. A short description of both the rationale behind the initial selection of a suitable optimization technique and the status of the op
J. Aerosp. Technol. Manag.. Publicado em: 2014-03
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8. Emprego de ferramentas estatísticas para avaliação da usinabilidade de ligas de alumínio
The main objective of the present work is to study the effect of the input variables: mechanical properties of the workpiece (tensile strength, hardness and elongation) and cutting conditions (cutting speed, feed rate, depth of cut and lubri-cooling system) over the output variables: cutting forces, power consumption, cutting temperature, surface roughness (
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/05/2012
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9. Selection of optimal process parameters for minimizing burr size in drilling using Taguchi's quality loss function approach
The exit burr in drilling degrades the precision of products and causes additional cost of deburring. Therefore, it is essential to minimize burr size at the exit of holes in drilling at the manufacturing stage. Taguchi's quality loss function approach, a multi-response optimization method, has been employed to determine the best combination values of cuttin
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-09
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10. Contribuição ao estudo dos absorvedores dinâmicos de vibrações não-lineares / A contribution to the study of Nonlinear Vibration Absorbers
In their simplest form, dynamic vibration absorbers (DVAs) are essentially devices of lumped parameters of mass-stiffness-damping that once connected in a given primary structure are capable of absorbing the vibratory energy at the connecting point, providing a reduction of the vibration level. These devices can be used in various configurations and find a n
Publicado em: 2008
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11. Design of multi-phase micromechanisms using the topology optimization method. / Projeto de micromecanismos multifásicos usando o método da otimização topológica.
A micromechanism is essentially a device of milimetric, or even micrometric, dimensions that can actuate as a gripper, tweezers, clamp, etc. When coupled to an electronic system, they are called "Micro-Electro-Mechanical Systems" (MEMS). Almost all of these devices are constituted by compliant mechanisms, where the motion is allowed by the compliance of its
Publicado em: 2006
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12. Study of cost minimization of separation process of a multi components gas mixtures through the hollow fiber membrane / Estudo da minimização do custo de um processo de separação de misturas gasosas multicomponentes atraves da membrana de fibra oca
The separation of gas mixtures is made under the objective of obtaining one or more representatives in the highly pure form. Four methods can be used in gas separation: absorption, adsorption, distillation cryogenics and membranes. The economy of the process will determine which method will be used in a specific application (Scott, 1995). The modem era of ga
Publicado em: 2006