Machine Tools
Mostrando 25-36 de 107 artigos, teses e dissertações.
-
25. Improvement of the productivity in getting holes in aviation aluminum alloys with high speed tools / Melhoria da produtividade na obtenção de furos em liga de aluminio aeronautico com ferramentas de aço rapido
The purpose of this study is to optimize the manufacturing process of holes made by Company X in one of their products. Besides the optimization, should be maintained the dimensional quality by controlling the diameter, roundness, circularity, and surface finish of cylindrical holes obtained by the widening process, with high-speed steel reamers in a aluminu
Publicado em: 2010
-
26. Um estudo comparativo de modelos baseados em estatísticas textuais, grafos e aprendizado de máquina para sumarização automática de textos em português
Automatic text summarization has been of great interest in Natural Language Processing due to the need of processing a huge amount of information in short time, which is usually delivered through distinct media. Thus, large-scale methods are of utmost importance for synthesizing and making access to information simpler. They aim at preserving relevant conten
Publicado em: 2010
-
27. Linguagens de domínio específico e sensores baseados em modelos biológicos de computação
A Domain Specific Language is a specification language dedicated to a particular domain, representation technique, or solution searching method. On the other hand, a general-purpose programming language is a language designed with the goal of emulating Lambda Calculus or Turing Machine. Since general-purpose languages must accept any algorithm that can be ex
Publicado em: 2010
-
28. Pre-processing for noise detection in gene expression classification data
Due to the imprecise nature of biological experiments, biological data is often characterized by the presence of redundant and noisy data. This may be due to errors that occurred during data collection, such as contaminations in laboratorial samples. It is the case of gene expression data, where the equipments and tools currently used frequently produce nois
Journal of the Brazilian Computer Society. Publicado em: 2009-03
-
29. Application of the Minimum Quantity Lubrication (MQL) technique in the plunge cylindrical grinding operation
Precision cylindrical grinding is used extensively in the manufacture of precision components in the metal-mechanical industry in general. Modern CNC grinding machines have improved this process with respect to the positioning and rigidity of the machine-workpiece-tool system, allowing the production of high precision parts with low dimensional tolerances. B
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2009-03
-
30. Estudo de uma metodologia baseada na utilizacao de ferramentas de simulacao numérica aplicadas às áreas de manutenção
Maintenance area has striven for new work methods as an approach to support the growing demand of expansions and diversification in national Steelmaking Production. In this context, it has searched an increase of equipment lifetime and fault analysis through the employment of tools which have been, up to this time, more commonly used in the field of project
Publicado em: 2009
-
31. Internal turning for cylinder liners made of centrifuged gray cast iron / Torneamento interno de cilindros automotivos de ferro fundido cinzento centrifugado
This investigation describes and shows an unprecedented machining process to be used for manufacturing cylinder liners, which are very important parts used in aluminum engine blocks for automobiles. There are few known companies that manufacture this kind of component, and until now, all of them use a boring process to machine the internal diameter of the cy
Publicado em: 2009
-
32. Stiffness Study of Closed Kinematics Chains / Estudo de rigidez de cadeias cinemáticas fechadas
Multibody systems consist on a kinematic chain composed of links that can be rigid or flexible, interconnected by joints. The multibody systems are of great importance and are used in various applications such as in aerospace and automobile engineering, machine tools, mechanisms, sea exploration, medicine and robotics. An example of multibody system that has
Publicado em: 2009
-
33. Avaliação dos Impactos da Impedância de Falta e da Geração Distribuída em Estudos de Afundamentos de Tensão / Impact Assessment of Fault Impedance and Distributed Generation Studies of Voltage Sags
This work presents an impact analysis of the fault impedance and distributed ge- neration on the amplitude and annual average quantity of voltage sags in sensitive end-users. Phase-to-ground solid and non-solid faults were simulated in 62 transmission lines at 230, 138, 69 and 13.8 kV, which made part of the electrical system of the municipality of Goiânia,
Publicado em: 2009
-
34. Ferramenta pneumática para movimentação de carrocerias rodoviárias em linhas de montagem / Pneumatic tool to drive road vehicles on assembly lines
Este trabalho apresenta um estudo de caso na indústria de implementos e veículos rodoviários para solução do processo específico de movimentação de veículos e carrocerias rodoviárias nas linhas de montagem. A solução é o desenvolvimento do projeto de uma ferramenta pneumática para atender os parâmetros identificados no processo de movimentaç�
Publicado em: 2009
-
35. O controle externo do Poder JudiciÃrio e a atuaÃÃo do Conselho Nacional de JustiÃa nos Estados da FederaÃÃo: as propostas atuais de gestÃo em Pernambuco e outros Estados
The emergence of the National Council of Justice in 2004 and its effective control of the Judiciary Foreign National show, clearly, a step in public management and administration to combat old negative addictions rooted in justice as slow procedural, functional and abuse of authority, lack of transparency, corruption, nepotism, lack of organizational structu
Publicado em: 2009
-
36. Caracterização e qualidade ambiental em dois fragmentos florestais na perspectiva da conservação de Alouatta guariba (HUMBOLDT, 1812) no interior do estado de São Paulo
This study was accomplished in two forests fragments with different environmental characteristics; the Parque Estadual do Morro do Diabo (PEMD), a Conservation Unit located at Pontal of Paranapanema, and the Água-Branca Farm Reserve (RPFAB), a fragment forest near to the of Araçatuba munipality. The objective was to research the environmental characterizat
Publicado em: 2009