Computational Topology
Mostrando 1-12 de 60 artigos, teses e dissertações.
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1. Bandpass Filter Using SIW Technology in Inductive Window Topology with Low-Cost Substrate FR-4
Abstract This paper features a step-by-step procedure for designing, simulate, and manufacture a bandpass filter using an inductive window topology within the substrate integrated waveguide (SIW) technology. We have chosen an operating frequency in the microwave range compatible with IoT circuits, employing a dielectric material, the FR-4, which is low cost
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. A Quantitative Comparison Between Size, Shape, Topology and Simultaneous Optimization for Truss Structures
Abstract There are typically three broad categories of structural optimization namely size, shape and topology. Over the past few decades various researchers have focused on developing techniques for optimizing structures by considering either one or a combination of these aspects. In this paper the efficiency of these techniques are investigated in an effor
Lat. Am. j. solids struct.. Publicado em: 2017-12
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3. Contribuições para o aplicativo APR: novos limites de suportabilidade, perturbações via medições e sistematização no processo da configuração da rede elétrica
The refunding requests coupled with the standard ANEEL 360/2009, which has contributed to the standard 61/2004, are considered the main Brazilian guidelines to cope with the subject of consumer reimbursement due to electrical appliances damages. Indeed, the subject is growing in valuable due to its social relevance, the commercial relationship between suppli
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2012
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4. Estudo exploratório sobre fontes de os jitter no kernel linux
The OS Jitter phenomenon has been considered an important factor in high-performance distributed computing. In this thesis, we present the results of an experimental study that quantifies the effects of different sources of OS Jitter in the Linux operating system. We use the DOE method to conduct controlled experiments statistically planned. Differently than
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/06/2012
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5. Aplicação de sistemas multiagentes para gerenciamento de sistemas de distribuição tipo Smart Grids / Application of multiagent systems for management of distribution systems like Smart Grids
Smart grids are taken as the new generation of electric power systems, combining advances in computing, distributed systems and artificial intelligence to provide more features on real-time monitoring of demand and consumption of electricity, managing large-scale distributed generators, among others, from a distributed control system on the grid. This approa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/03/2012
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6. Optimized microlens-array geometry for Hartmann-Shack wavefront sensor: design, fabrication and test
The Hartmann-Shack (H-S) wavefront sensor is now deployed in many different fields, from astronomy to industrial inspection, where the quality of optical media or components can be measured by the distortions (wavefront aberrations) they impart on a wavefront transmitted or reflected by them. In ophthalmology, this sensor is a core component of major aberrom
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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7. Proposta de alocação de baterias em redes de sensores sem fio orientada à maximização do tempo de vida / Proposal of battery allocation on wireless sensor networks oriented to lifetime maximization
The recent advances in Wireless Sensor Networks technologies showed that while computational limitations are transient issues, energy limitations are much more complicated problems. In this work, a strategy aiming the lifetime increment of Wireless Sensor Networks is proposed. The main motivation of this work is that energy limitation is a serious inherent p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/07/2011
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8. Otimização topológica e paramétrica de vigas de concreto armado utilizando algoritmos genéticos. / Topology and shape optimization of concrete beams by genetic algorithms
This work presents a study and application using Genetic Algorithms (GAs) to solve problems that optimization structures, more specifically concrete beans. The GAs are search algorithms, non-deterministics that works with a population of solutions. Its inspired on the evolutions theory of the species to solve problems. In this dissertation sought to show the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/05/2011
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9. Otimização de topologia de estruturas e componentes / Topology optimizatin of sctructures and components
Topology optimization (TO) is an optimization technique that aims to help the designer in the phase of structural conception, seeking a better distribution of one fixed amount of material in a extended design domain. It combines a method of structural analysis with a mathematical programming (MP) algorithm. In this work, structural analysis is done by Finite
Publicado em: 2010
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10. Otimização topológica de transdutores piezelétricos com gadação funcional de material: projeto, simulação, análise e fabricação. / Topology optimization of piezoelectric transducers considering functionally graded material: design, simulation, analysis and fabrication.
Piezoelectric materials generate displacements when they are excited by electrical potential and electrical potential when they are excited by force or pressure. These materials are widely applied in Precision Mechanics, Mechatronics, and Ultrasonic imaging areas. On the other hand, Functionally Graded Materials (FGM) are advanced materials, whose properties
Publicado em: 2010
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11. Topology optimization of compliant mechanisms / Otimização topologica de mecanismos flexiveis
In this work, we study some possible formulations for the topology optimization problem of a compliant mechanism, proposed by Nishiwaki et al. [33], Lima [26] and Sigmund [37]. To solve the nonlinear programming problem associated to each formulation, we use a globally convergent version of the Sequential Linear Programming, inspired in the Gomes et al. [18]
Publicado em: 2009
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12. Uma abordagem para minimização de consumo de energia em redes de sensores sem fio com sorvedouros móveis
In this work, we introduce a new network topology model and algorithms to minimize the energy consumption in Wireless Sensor Networks (WSNs) with mobile sinks. On the one hand, the proposed optimization problem explicitly minimizes the energy consumption rates due to message forwarding. On the other hand, it also attempts to keep message delay rates at low l
Publicado em: 2009