Temperature Feedback
Mostrando 1-12 de 86 artigos, teses e dissertações.
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1. Controller for a SPS machine: a proposal PI control
ABSTRACT Temperature control is the key to effective sintering process for metal, ceramic and polymer powders. The original control temperature provides an irregular control operation process which affects the material properties due to the spacer involved in it. Furthermore, it is analyzed how the material responds to an electrical input determining a model
Matéria (Rio J.). Publicado em: 19/07/2018
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2. Efficacy of removal of cariogenic bacteria and carious dentin by ablation using different modes of Er:YAG lasers
The primary objective of this in vitro study was to evaluate the efficiency of removal of cariogenic bacteria and carious dentin by ablation using two lasers: fluorescence-feedback controlled (FFC) Er:YAG laser and different pulses of Er:YAG laser based on variable square pulse technology (VSPt). The secondary objective was to measure the temperature during
Braz J Med Biol Res. Publicado em: 11/01/2018
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3. Potenciais influências de anomalias positivas e negativas na camada de gelo marinho no mar de Ross na circulação atmosférica do Hemisfério Sul / Potential influences on the southern hemisphere atmospheric circulation of negative and positive sea ice extension anomalies in the ross sea
This study have used the CPTEC/INPE AGCM to explore the role of sea ice extent in the Ross Sea as a forcing of the asymmetric atmospheric circulation in the southern hemisphere during the austral winter (July-September), on a seasonal scale. The impacts have been assessed from the standpoint of positive and negative observed anomalies in ice extent in the Ro
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2011
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4. Cinética pontual com realimentação de temperatura considerando um grupo de precursores de nêutrons atrasados
Recentemente, surgiu na literatura uma solução analítica das equações de cinética pontual que considera a reatividade como função do tempo, utilizando o método da decomposição. O presente trabalho dá um passo a frente, considerando as equações de cinética pontual em conjunto com efeitos de realimentação de temperatura. Mas, primeiro, uma bre
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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5. A vibroacoustic application of modeling and control of linear parameter-varying systems
This paper applies recent advances in both modeling and control of Linear Parameter-Varying (LPV) systems to a vibroacoustic setup whose dynamics is highly sensitive to variations in the temperature. Based on experimental data, an LPV model is derived for this system using the State-space Model Interpolation of Local Estimates (SMILE) technique. This modelin
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-12
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6. Câmaras climáticas para o envelhecimento acelerado: ação de microambientes sobre bens culturais
Environmental chambers were designed for the accelerated ageing of materials used in artistic artifacts to study the synergistic action of temperature, humidity, UV and visible radiation and gaseous pollutants. Two inox-steel/PTFE compartments are kept under controlled temperature and relative humidity, whose values are transmitted to a PC, which stores, plo
Química Nova. Publicado em: 2010
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7. Modelagem e controle de microturbina a gás do tipo split-shaft. / Modeling and control of slip-shaft gas microturbine.
The objective of the present work is the development of the model of a split-shaft micro gas turbine with feed back control system. A bibliographical review of the works on control of gas turbines indicated that there are very few works dealing this type of gas turbines. The model was developed starting from the basic geometry of the turbine and applying the
Publicado em: 2010
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8. Medidas de tensão superficial pelo método de contagem de gotas: descrição do método e experimentos com tensoativos não-iônicos etoxilados
Surface tension knowledge of surfactants aqueous solutions is important during amphiphilic molecule manufacturing and new product development, as feedback information to handle synthesis parameters to target performance. Drop counting method is an interesting simplification of drop weight method for surface tension measurements. A simple laboratory measureme
Química Nova. Publicado em: 2009
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9. Estudo da estabilidade do acoplamento de modos de um laser a fibra dopada com érbio com pulsos de femtossegundos e taxa de 10 GHz
In this work we show a study of mode-locking stabilization in an Erbium doped fiber laser with assynchronous mode-locking generating ultra-short pulses at the rate of 10 GHz. The fiber effects are presented as well as the mode-locking techniques. Also is presented a study of energy pulse stabilization, frequency and cavity, in addition an overview of stabili
Publicado em: 2009
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10. Vulnerability of soil organic matter to temperature increase / Vulnerabilidade da matéria orgânica do solo ao aumento de temperatura
Soil organic matter (SOM) decomposition emits greenhouse gases to the atmosphere and this may contribute to global warming. Global warming can promote a positive feedback on SOM decomposition rate and it can increase soil C losses. The SOM has different pools with inherent temperature sensitivity. Some researches suggest that resistant soil C is less sensiti
Publicado em: 2008
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11. Development of an anthropomorphic prosthesis prototype for superior members / Desenvolvimento do protótipo de uma prótese antropomórfica para membros superiores
The purpose of this assignment is to develop a multifunctional and anthropomorphic upper limb prosthesis prototype for amputated patients. Its objective is to substitute the natural lost hand, in a way to improve the performance of regular activities. This prosthesis will have anthropomorphic characteristics, like appearance and movement, similar to the ones
Publicado em: 2008
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12. Experimental evaluation of the continuous pasteurization control of a orange juice model fluid / Avaliação experimental do controle da pasteurização continua de um fluido modelo de suco de laranja
The goal of this work was the building, instrumentation and implementation of conventional and non-conventional controllers in a HTST (Hight Temperature Short Time) continuous processing prototype of fruit juice. A plate heat exchange with three sections of heat exchange (regeneration, heating and cooling) and a holding tube were used to achieve a holding ti
Publicado em: 2007