Machine Tools
Mostrando 37-48 de 107 artigos, teses e dissertações.
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37. Uso de ferramentas de aprendizado de máquina para prospecção de perdas comerciais em distribuição de energia elétrica / Use of machine learning tools for prospecting commercial losses in electric energy distribution
As concessionárias de energia elétrica deixam de faturar anualmente expressivos valores devido a perdas comerciais, as quais são originadas principalmente por fraudes cometidas por parte dos consumidores e por medidores defeituosos. A detecção automática dos pontos específicos onde ocorrem tais perdas é uma tarefa complexa, dada a grande quantidade d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/01/2008
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38. Characterization of compression strength of granite-epoxy composites using design of experiments
This paper presents a processing study of the polymer matrix composite (PMC) developed with an epoxy polymeric matrix reinforced with particulate ceramic granite. This PMC composite has been reported to be used as structural parts of machine tools and Coordinate Measuring Machines due to its superior vibration damping characteristics and reduced processing c
Materials Research. Publicado em: 2008-12
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39. Minimum pressure coefficient criterion applied in axial-flow hydraulic turbines
The recent development of computer-based tools with more efficient algorithms has allowed a substantial improvement in hydraulic turbine design. The definition of an initial geometry capable to assist certain characteristics of turbine performance is a first step for useful numerical turbine analysis. This paper presents an application of the minimum pressur
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2008-03
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40. The real and virtual in tecnical education of agricultural mechanization a case study. / O real e o virtual no ensino técnico de mecanização agrícola um estudo de caso.
The technological evolution of the tractors and agricultural implements establishes a challenge to the formation of the professionals who will make use of this technology. It is imperative that the education of agricultural mechanization in the schools techniques give the opportunity to students in acquiring a lot of information on the tractors and implement
Publicado em: 2008
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41. Proposta para implementação conjunta de um sistema da qualidade ISO 9001:2000 para empresas do aglomerado de Sertãozinho / Proposal of a collaborative implementation of a ISO 9001:2000 quality system for companies of the Sertãozinho cluster
Small and medium-sized entrerprise clusters have received great attention due to their potential for promoting the economic and social development of the companies they represent. Upon exploiting the similarities among companies from the same cluster, the application of continuous improvement tools is facilitated. Following this line of thinking, the necessi
Publicado em: 2008
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42. Simulation of optical and physiological phenomena of the human vision / Simulação de fenômenos óticos e fisiológicos do sistema de visão humana
The increase in performance of the modern computers has driven scientific work in the areas of computer simulation. Many authors use in their research commercial tools that use embedding algorithms, which sources are not provided, and it makes harder and sometimes impossible, the development of novel theories or experiments. This work explores this gap left
Publicado em: 2008
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43. The behavior of graphite and copper electrodes on the finish die-sinking electrical discharge machining (EDM) of AISI P20 tool steel
The machining parameter settings installed at CNC EDM machines are developed under optimum process conditions. Standard workpiece and electrode materials are used traditionally by machine manufacturers to establish the EDM parameter settings. However, this is not the usual situation of the tooling industry, where many different grades of workpiece and tool e
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-12
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44. Methodology for automatic selection of passes in surface grinding
The main purpose of this work is the development of computational tools in order to assist the on-line automatic detection of burn in the surface grinding process. Most of the parameters currently employed in the burning recognition (DPO, FKS, DPKS, DIFP, among others) do not incorporate routines for automatic selection of the grinding passes, therefore, req
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2007-03
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45. Influência do comportamento estrutural no erro de posicionamento de uma máquina de cinemática paralela. / Influence of the structural behavior in the error of positioning of a parallel kinematic machine.
In spite of the effort spent by the academic and industrial communities (goods, patents and laboratory prototypes), the Parallel Kinematics Machines - PKMs - they still present an inexpressive participation in the market of machine-tools and robots. One of the reasons for this fact is their low indexes of accuracy and precision, in comparison with the machin
Publicado em: 2007
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46. Utilização de máquinas de suporte vetorial para predição de estruturas terciárias de proteínas / Support vector machine for tertiary structure prediction
The three-dimensional structure of a protein is directly related to its function. Many projects of genetic sequence analysis accumulate a great number of protein sequences whose primary and secondary structures are known. However, the information on its three-dimensional structures are available only for a small fraction of these proteins. This fact evidence
Publicado em: 2007
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47. Estudo do Springback na conformação mecânica de segmentos toroidais em chapas grossas
In order to understand the springbacks effect in the mechanical forming of segments toroids in thiek plates in na industry metal-mechanic area, through by numeric means of simulation, the present speech have the target preview and visualize the geometry of tools (tie and punch) and own deformed part, as the quantity of these elastic return after forming. For
Publicado em: 2007
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48. Indução de léxicos bilíngües e regras para a tradução automática / Induction of translation lexicons and transfer rules for machine translation
Machine Translation (MT) -- the translation of a natural (source) language into another (target) by means of computer programs -- is a hard task, mainly due to the need of deep linguistic knowledge about the two (or more) languages required to build resources such as translation grammars, bilingual dictionaries, etc. The scarcity of linguistic resources or e
Publicado em: 2007