Optimality System
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. A DISCRETE DYNAMICAL SYSTEM AND ITS APPLICATIONS
ABSTRACT The main goal of this manuscript is to introduce a discrete dynamical system defined by symmetric matrices and a real parameter. By construction, we rediscovery the Power Iteration Method from the Projected Gradient Method. Convergence of the discrete dynamical system solution is established. Finally, we consider two applications, the first one cons
Pesqui. Oper.. Publicado em: 02/12/2019
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2. A COMPARATIVE STUDY OF STOCHASTIC QUADRATIC PROGRAMMING AND OPTIMAL CONTROL MODEL IN PRODUCTION-INVENTORY SYSTEM WITH STOCHASTIC DEMAND
ABSTRACT This study compares the optimal control model and stochastic quadratic programming (SQP) model of a production-inventory system. A single product, without shortage in the case of a periodic-review policy with stochastic demand and deterioration rate as a function of time, is discussed. The items are subjected to deterioration via storage and the inv
Pesqui. Oper.. Publicado em: 2017-01
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3. Controle hierárquico para a equação do calor via estratégia Stackelberg-Nash
Temos como principal tema neste trabalho o Controle Hierárquico, que consiste em um sistema de líder e seguidores. Estudamos em especial a controlabilidade aproximada da equação do Calor sob a estratégia de Stackelberg-Nash, estratégia esta direcionada em controlar todo sistema a partir de escolhas de controles locais com o mínimo de custos possíveis
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/09/2011
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4. Controle Hierárquico da Equação da Onda
O presente trabalho tem o controle distribuído v aplicado á fronteira da Equação da Onda Linear. Buscamos atingir dois objetivos: um do tipo controlabilidade, e outro o não distanciamento do estado do sistema a um estado y2 (x; t) predefinido. Esse é um problema de otimização multicritério, e para solucioná-lo, introduzimos a noção de controle ó
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/07/2011
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5. Testing the Optimality of Aggregate Consumption Decisions: Is there Rule-of-Thumb Behavior?
Consumption is an important macroeconomic aggregate, being about 70% of GNP. Finding sub-optimal behavior in consumption decisions casts a serious doubt on whether optimizing behavior is applicable on an economy-wide scale, which, in turn, challenge whether it is applicable at all. This paper has several contributions to the literature on consumption optimal
Publicado em: 15/02/2009
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6. Optimal treatment choice and blocking for the construction of fractional factorial designs / Escolha de tratamentos e blocagem otimizados na construÃÃo de fatoriais fracionÃrios
This work deals with implementing exchange and interchange algorithms. Efficiency based optimality criteria were used to and optimal fractional factorials for response surface designs. Both treatment choice and blocking were considered. Designs found for each situation were compared to alternatives from literature. In all cases A-optimal or D-optimal designs
Publicado em: 2009
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7. An optimal linear control design for nonlinear systems
This paper studies the linear feedback control strategies for nonlinear systems. Asymptotic stability of the closed-loop nonlinear system is guaranteed by means of a Lyapunov function, which can clearly be seen to be the solution of the Hamilton-Jacobi-Bellman equation thus guaranteeing both stability and optimality. The formulated Theorem expresses explicit
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2008-12
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8. Alguns problemas de controle multiobjetivos gorvernados por equações diferenciais parciais
In this work we will investigate basically three control problems subject to partial diferential equations. The first problem to be treated is distributed system governed by a model for solidification of a pure liquid; the second is a distributed system governed Navier - Stokes equations and the third, one is control problem with several local objectives plu
Publicado em: 2005
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9. Finite-time thermodynamics: Engine performance improved by optimized piston motion
The methods of finite-time thermodynamics are used to find the optimal time path of an Otto cycle with friction and heat leakage. Optimality is defined by maximization of the work per cycle; the system is constrained to operate at a fixed frequency, so the maximum power is obtained. The result is an improvement of about 10% in the effectiveness (second-law e
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10. On the optimal sex ratio.
The equilibrium structures for various multiallele sex-determining genetic models of panmictic populations with sex expression depending on the genotypes of either the zygote or a parent are described. Even-sex-ratio equilibrium surfaces can exist apart from equilibrium points having coincident male and female allelic frequency sets. The latter (symmetric) e
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11. The Fundamental Theorem of Natural Selection in Ewens' Sense (Case of Fertility Selection)
We show that the Fundamental Theorem of Natural Selection in Ewens' sense is valid in the case of fertility selection: the additive genetic variance in fertility divided by the mean fertility is exactly equal to the partial change in the mean fertility from the current generation to the next. This partial change is the increase in the mean additive value cau
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12. Structured Variability of Muscle Activations Supports the Minimal Intervention Principle of Motor Control
Numerous observations of structured motor variability indicate that the sensorimotor system preferentially controls task-relevant parameters while allowing task-irrelevant ones to fluctuate. Optimality models show that controlling a redundant musculo-skeletal system in this manner meets task demands while minimizing control effort. Although this line of inqu
American Physiological Society.