Machine Elements
Mostrando 1-12 de 69 artigos, teses e dissertações.
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1. DEVELOPMENT OF A PNEUMATIC OLIVE HARVESTER
ABSTRACT A pneumatic olive harvester was developed and evaluated in this study. The components of the developed machine were the limb clamp, vibrating unit, control elements, main tube, air-pressured hoses, control valve, and power source. The measurements that related to the development of the harvester were fruit and limb damage, and some physical and mech
Eng. Agríc.. Publicado em: 2021-05
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2. Digital mapping of soil attributes using machine learning
RESUMO O mapeamento de atributos químicos do solo em larga escala pode acarretar em ganhos no planejamento de uso e ocupação do mesmo. Existem diferentes técnicas disponíveis para tal fim, cujos desempenhos devem ser testados para diferentes situações de paisagem. Objetivou-se neste trabalho espacializar atributos químicos do solo, comparando oito m�
Rev. Ciênc. Agron.. Publicado em: 04/11/2019
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3. “O alquimista dos valores”. As cartas do último Nietzsche (1885-1889)
Resumo Este artigo tem como objetivo analisar as cartas de Nietzsche, questionando se podemos legitimamente considerá-las como veículo de compreensão e interpretação de sua obra. Embora as cartas sejam inevitavelmente contaminadas por seu contexto, agora é geralmente aceito que elas não podem ser consideradas “parasitas” nas obras de seus autores,
Cad. Nietzsche. Publicado em: 16/05/2019
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4. RANKING OF WEB PAGES BY LEARNING MULTIPLE LATENT CATEGORIES / CLASSIFICAÇÃO DE PÁGINAS WEB POR APRENDIZAGEM DE MÚLTIPLAS CATEGORIAS LATENTES
The rapid growth and generalized accessibility of the World Wide Web (WWW) have led to an increase in research in the field of the information retrieval for Web pages. The WWW is an immense and prodigious environment in which Web pages resemble a huge community of elements. These elements are connected via hyperlinks on the basis of similarity between the co
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/03/2012
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5. Codificação de vídeo baseada em fractais e representações esparsas / Video coding based on fractals and sparse representations
A video is a sequence of still images representing scenes in motion. A video is a sequence of extremely similar images separated by abrupt changes in their content. If these images were transmitted and stored without any kind of preprocessing, this would require a massive amount of storage space and communication channels with very high bandwidths. Lossy com
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/03/2012
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6. Algoritmo de aprendizado supervisionado - baseado em máquinas de vetores de suporte - uma contribuição para o reconhecimento de dados desbalanceados / Supervised learning Algorithm - Based on Support Vector Machines - A Contribution to the Recognition of Unbalanced Data
The machine learning in datasets that have unbalanced classes, has received considerable attention in the scientific community, because the traditional classification algorithms dont provide a satisfactory performance. This low performance can be explained by the fact that the traditional techniques of machine learning consider that each class present in the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/09/2011
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7. Implementação de um programa computacional para auxilio ao projeto de freios automotivos utilizando técnicas de metodologia de projeto / Implementation of a computer program to aid the design of automotive brakes using techniques of the design methodology
This work presents the development of the informational and preliminary design phases to friction brakes applied to urban vehicles of low cost. The design development of the brake systems for vehicles with less or zero pollutants emissions, with high efficiency depends strongly of the control systems, dirigibility conditions and mainly of the solutions to th
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2011
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8. Effect of laser welding on the titanium ceramic tensile bond strength
Titanium reacts strongly with elements, mainly oxygen at high temperature. The high temperature of titanium laser welding modifies the surface, and may interfere on the metal-ceramic tensile bond strength. OBJECTIVE: The influence of laser welding on the titanium-ceramic bonding has not yet been established. The purpose of this in vitro study was to analyze
J. Appl. Oral Sci.. Publicado em: 27/05/2011
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9. Seleção de características por meio de algoritmos genéticos para aprimoramento de rankings e de modelos de classificação / Feature selection by genetic algorithms to improve ranking and classification models
Content-based image retrieval (CBIR) and classification systems rely on feature vectors extracted from images considering specific visual criteria. It is common that the size of a feature vector is of the order of hundreds of elements. When the size (dimensionality) of the feature vector is increased, a higher degree of redundancy and irrelevancy can be obse
Publicado em: 2011
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10. Vibroacustografia na avaliação tridimensional de artroplastia total de quadril / Vibro-acoustography in the tridimensional evaluation of total hip arthroplasty
Vibro-acoustography (VA) is a high lateral resolution (<0.7 mm), speckle-free, non- ionizing and non-invasive image based on the nonlinear combination phenomenon of ultrasound waves (MHz) that generates a narrow focus region of low frequency (kHz). In this work, we propose a VA-based tridimensional evaluation of the exposed area of implants, after total hip
Publicado em: 2011
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11. Análise dinâmica de rolamentos de esfera / Dynamic analysis of ball bearing
Ball bearings are simple machine elements but largely used in several applications involving high velocities, high temperatures and different loads. The load model is fundamental for the ball bearing s dynamic and for this reason it is necessary to define with accuracy the mechanisms performance using analytical methods. The objective of this thesis is to an
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/08/2010
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12. Uma abordagem multi-agente para competição de agentes negociadores em gerenciamento de cadeias de suprimento. / A multi-agent approach to negotiating agents of competition in supply chain management.
This work aimed to design a computational approach to supply chain management problem in the scenario Trading Agent Competition for Supply Chain (TAC-SCM) when disturbances on manufacturing process are considered. Simulations have shown that the decentralized approach based on smart products is promising in terms of robustness of the system of control and pl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/04/2010