Quadratic Programming
Mostrando 37-48 de 70 artigos, teses e dissertações.
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37. Otimização de estruturas reticuladas planas com comportamento geometricamente não linear / Optimization of plane frame structures with behavior geometrically nonlinear
The aim of this work is to present a formulation and corresponding computational implementation for sizing optimization of plane frames and cable-stayed columns considering geometric non liner behavior. The structural analysis is based on the finite element method using the updated lagrangian approach for plane frame and cable elements, which are represented
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/10/2006
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38. A new primal-dual path-following method for convex quadratic programming
In this paper, we describe a new primal-dual path-following method to solve a convex quadratic program (QP). The derived algorithm is based on new techniques for finding a new class of search directions similar to the ones developed in a recent paper by Darvay for linear programs. We prove that the short-update algorithm finds an epsilon-solution of (QP) in
Computational & Applied Mathematics. Publicado em: 2006
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39. Controle e otimização em tempo real de um reator trifasico / Real time optimization and control-three-phase slurry reactor
The principal objective of this work was the evaluation of classic and hierarchical control strategies in real time. It was used as case study the o-cresol hydrogenation in a three-phase slurry reactor with solid catalyst to validate the real time optimization approaches, due to the inherent importance of this process, since these reactors are present in man
Publicado em: 2006
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40. Optimum sizing of units of generation distributed in radial systems of distribution through techniques of nonlinear programming. / Ajuste ótimo da potência inserida por unidades de geração distribuída em alimentadores de média tensão
The optimum sizing of units of Distributed Generation is a problem to which this formulation takes in consideration the reduction of losses in the distribution lines, the voltage control, the capacity (in MW) of the units respecting the operational limits of the system. The main objective of the sizing process is to determine the active and reactive power le
Publicado em: 2006
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41. Otimização de seções transversais de concreto armado: aplicação a pórticos planos / Reinforced concrete cross-section cost optimization: a plane frame application
A computational routine developed to optimize the first draft design of reinforced concrete buildings, approximated by plane frames. The commercial softwares used by the engineering offices for structural design is usually based in a first draft design, being this essential stage still accomplished by the engineer´s experience and intuition, using attempt a
Publicado em: 2006
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42. Interior points methods for the hydrothermal scheduling problem / Metodos de pontos interiores aplicados ao problema de pre-despacho de um sistema hidrotermico
Os métodos de pontos interiores primais-duais de trajetória central e preditor-corretor são desenvolvidos para o problema de minimização das perdas na geração e transmissão do pré-despacho DC de um sistema de potência hidrotêrmico e a estrutura matricial resultante explorada obtendo uma implementação eficiente. No pré-despacho de sistemas hidro
Publicado em: 2006
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43. Low-sum order value optimization / Otimização da menor soma de valores ordenados
Given r real functions Fl(X),..., Fr(x) defined in n c IRn and an integer p between 1 and r, the Low Order-Value Optimization problem (LOVO) consists of minimizing the sum of the functions that take the p smallest values. If (Yl,..., Yr) is a vector of data and T(x, ti) is the predicted value of the i-th observation ith the parameters x E n, it is natural to
Publicado em: 2006
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44. Detailed modelling and optmization of crystallization process / Modelagem detalhada e otimização de processos de cristalização
This work is focused on crystallization, a process widely used in industry, especially for the production of high added-value particles in pharmaceutical and fine chemistry industries. Although it is a process of established utilization, its mechanisms, modeling and the real control of its operation still require research and study. This thesis presents cons
Publicado em: 2006
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45. An augmented Lagrangian SQP method for solving some special class of nonlinear semi-definite programming problems
In this paper, we consider a special class of nonlinear semi-definite programming problems that represents the fixed order H2/H¥ synthesis problem. An augmented Lagrangian sequential quadratic programming method combined with a trust region globalization strategy is described, taking advantage of the problem structure and using inex
Computational & Applied Mathematics. Publicado em: 2005-12
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46. Solving the unit commitment problem of hydropower plants via Lagrangian Relaxation and Sequential Quadratic Programming
We consider the optimal scheduling of hydropower plants in a hydrothermal interconnected system. This problem, of outmost importance for large-scale power systems with a high proportion of hydraulic generation, requires a detailed description of the so-called hydro unit production function. In our model, we relate the amount of generated hydropower to nonlin
Computational & Applied Mathematics. Publicado em: 2005-12
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47. Optimal pest control problem in population dynamics
One of the main goals of the pest control is to maintain the density of the pest population in the equilibrium level below economic damages. For reaching this goal, the optimal pest control problem was divided in two parts. In the first part, the two optimal control functions were considered. These functions move the ecosystem pest-natural enemy at an equili
Computational & Applied Mathematics. Publicado em: 2005-04
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48. Modelos de otimização para administração de risco de credito baseados nos conceitos de Basileia II
Credit risk management requires sophisticated models and techniques in the decision making process. It is an area with few academic works, and that makes it a vast field for research. The Continuous Optimization technique offers an excellent opportunity for the development of new approaches. Based on that technique, and using the concepts of Basel II, this w
Publicado em: 2005