Objective Fault
Mostrando 1-12 de 33 artigos, teses e dissertações.
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1. Simulação da propagação de ondas ultrassônicas longitudinais em materiais estruturais aeroespaciais / Simulating the propagation of longitudinal ultrasonic waves in aerospace structural materials
The use of composite materials in the aerospace industry is increasing due to its low ratio between density and mechanical strength. To perform non-destructive testing using ultrasound, it is necessary to know the sound velocity in these materials. It is not always possible to manufacture physical prototypes during the development of a project because of tim
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2012
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2. Sistemas inteligentes para monitoramento e diagnósticos de falhas em motores de indução trifásicos / Intelligent systems for faults monitoring and diagnosis in three-phase induction motors
The objective of this thesis consists of the implementation of intelligent systems for three-phase induction motors fault diagnosis and condition monitoring. Therefore, an experimental test stand for stator winding inter-turn short circuit faults, broken rotor bar in squirrel cage and, finally, defective wheel bearing has been designed. The main focus is to
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/04/2012
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3. Detecção de defeitos do tipo Resistive-Open em SRAM com o uso de lógica comparadora de vizinhança
The world we live today is very dependent of the technology advance and the Systemson- Chip (SoC) are one of the most important actors of this advance. As a consequence, the Moore s law has been outperformed due to this strong demand on the SoCs for growth, so that new silicon technologies has emerged along with new fault models that decreased the reliabilit
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2012
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4. Interpretação da culpa extracontratual insuficiência do critério abstrato: aplicação do modelo civil-constitucional da responsabilidade
O presente trabalho tem como objetivo apresentar as divergências entre os critérios utilizados pela doutrina para interpretação da culpa no âmbito da responsabilidade extracontratual e, dentro desse contexto, sugerir um modelo adequado aos princípios civil-constitucionais que envolvem o estudo do direito privado, especialmente a aplicação do direito
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/11/2011
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5. Análise das variáveis de entrada de uma rede neural usando teste de correlação e análise de correlação canônica / Analysis of input variables of an artificial neural network using bivariate correlation and canonical correlation
The monitoring of variables and diagnosis of sensor fault in nuclear power plants or processes industries is very important because an early diagnosis allows the correction of the fault and, like this, do not cause the production interruption, improving operators security and its not provoking economics losses. The objective of this work is, in the whole of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/09/2011
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6. Estimador de variações de tensão de curta duração em sistemas elétricos de potência utilizando estratégias evolutivas. / Estimate short duration voltage variation using evolutionary strategies.
A methodology is herein proposed to estimate Short Duration Voltage Variation (SDVV) in electric power systems, caused by electrical faults. To attain this target, values recorded by measurement equipment in specific sites are used. In fact, there are few power quality meters installed in power networks, due to the high cost of such meters. Although these co
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/09/2011
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7. Avaliação comparativa entre técnicas de programação defensiva aplicadas a um sistema crítico simulado. / Comparative evaluation among defensive programming techniques applied in a critical system simulated.
The introduction of software systems for critical applications raises safety issues that have long fell predominantly on the development of the hardware composing such systems. Currently, standards related to safety software qualitatively assess the impact of their use on systems sensitive to random errors. The research developed here seeks, in addition to o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/05/2011
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8. ESCOLARIZAÇÃO E INSERÇÃO DA PESSOA COM DEFICIÊNCIA AUDITIVA NO MERCADO DE TRABALHO FORMAL NA CIDADE DE SÃO LUÍS / EDUCATION AND INTEGRATION OF PEOPLE WITH DISABILITIES HEARING FORMAL LABOR MARKET IN THE CITY OF SÃO LUIS.
Research about Schooling and the insertion of the person with hearing deficiency in the formal labor market in the city of São Luís realized in the post graduation program in Education, Master in Education, of the Federal University of Maranhão. It was determinated as research object the relation between schooling and the insertion of the person with hear
Publicado em: 2011
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9. AvaliaÃÃo do impacto de uma polÃtica de manutenÃÃo na performabilidade de sistemas de transferÃncia eletrÃnica de fundos
The transfer electronic funds systems (EFT) promote financial benefits to institutions that utilize this kind of service and conveniences for its clients. EFT systems realize credit and debit operations in bank accounts through points of sales terminals (POSs) in different companies. This way, analyzing the performance of the EFT systems has a fundamental im
Publicado em: 2009
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10. Incorporação quantitativa de dados de sismica 4D no processo de ajuste de historico / Quantitative incorporation of seismic 4D in history matching process
Good decision making related to oilfield management depends on reliability of production forecast which demands calibrated reservoir simulation models. Due to the complexity of the production history matching process, there are many models with reasonable match but, many times, with different forecasts, mainly due to important heterogeneities that are not ob
Publicado em: 2009
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11. O Sujeito e o Desejo na Linguagem Persuasiva do Texto Publicitário de Mídia Impressa: uma abordagem psicanalítica.
This research has as objective to investigate the subject and the desire from the view of Jacques Lacans psychoanalytic theories, specifically about the alienation and separation processes, and also the following questions that involve them: the signifier, the enjoyment, the mirror stage and the a object; in the relationship with the persuasive language of t
Publicado em: 2009
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12. PRIORIZAÇÃO DOS MODOS DE FALHA DE EQUIPAMENTOS UTILIZANDO OS MÉTODOS DE ANÁLISE MULTICRITÉRIO PROMETHEE E FUZZY PROMETHEE / PRIORITIZATION OF FAILURE MODES OF EQUIPMENT USING THE METHODS OF MULTICRITERIA ANALYSIS PROMETHE AND FUZZY PROMETHE
Aiming to meet the criteria of availability and reliability required by the rules of the Brazilian electric sector, energy companies have increased the use of systems for monitoring and diagnosis. This allows the identification of prior evidence of abnormalities in the operational condition of substation equipment, enabling the practice of predictive mainten
Publicado em: 2009