Processes With Dead Time
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. DEATH GAMES AND THE PERSISTENCE OF MEMORY: J. G. BALLARD’S WORLD WAR II FICTIONS
Abstract This article is a discussion of J. G. Ballard’s (semi-)autobiographical war narratives, with a focus on the different textual strategies and processes of signification Ballard employs from his avant-garde novel The Atrocity Exhibition (1970) to the feverish fictional account of his time in World War II China in “The Dead Time” (1977) and Empir
Ilha Desterro. Publicado em: 2021-04
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2. Efficacy of fungal decolorization of a mixture of dyes belonging to different classes
Dyes are the most difficult constituents to remove by conventional biological wastewater treatment. Colored wastewater is mainly eliminated by physical and chemical procedures, which are very expensive and have drawbacks. Therefore, the advantage of using biological processes, such as the biotransformation of dyes, is that they may lead to complete mineraliz
Braz. J. Microbiol.. Publicado em: 2015-06
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3. Controle preditivo de horizonte infinito para sistemas integradores e com tempo morto. / Model predictive control of integrating systems with dead time.
Model Predictive Control (MPC) has gained wide acceptance in chemical industry in the last 30 years. The basic principle of this technique is to use a model to calculate plants future behavior based on the inputs it would receive in the next sampling periods. It must be set an objective, mainly composed of some measure of the distance between plants predicte
Publicado em: 2011
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4. Control of integrating process with dead time using auto-tuning approach
A modification of Smith predictor for controlling higher order processes with integral action and long dead-time is proposed in this paper. The controller used in this Smith predictor is an Integral-Proportional Derivative controller, where the Integrator is in the forward path and the Proportional and Derivative control are in the feedback, acting on the fe
Brazilian Journal of Chemical Engineering. Publicado em: 2009-03
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5. Modeling techniques and processes control application based on Neural Networks with on-line adjustment using Genetic Algorithms
In this work a strategy is presented for the temperature control of the polymerization reaction of styrene in suspension in batch. A three-layer feed forward Artificial Neural Network was trained in an off-line way starting from a removed group of patterns of the experimental system and applied in the recurrent form (RNN) to a Predictive Controller based on
Brazilian Journal of Chemical Engineering. Publicado em: 2009-03
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6. Um aparato para monitorar reações rápidas: um "stopped-flow" artesanal de baixo custo
The modern stopped-flow reaction analyzer has shown high efficiency and flexibility, which provides outstanding sample economy with a dead-time of less than 1 ms. However the cost of the equipment imposes a serious restriction to many Brazilian scientists and teachers. In this work we describe the construction of a low-cost stopped-flow system coupled to a U
Química Nova. Publicado em: 2006-10
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7. As dinâmicas de Schefflera angustissima (March.) Frodin (Araliaceae) e de Andira anthelmia (Vell.) March. (Fabaceae) na reserva de Morro Grande, São Paulo. / The dynamics of Schefflera angustissima (March.) Frodin (Araliaceae) and Andira anthelmia (Vell.) March. (Fabaceae) in the Morro Grande reserve, São Paulo.
Population dynamics deals with variation in time and space in the density and abundance of populations. The studies about the dynamics of tropical rain forest tree species, in particular, have become popular only about 1970, when the extinction risks for species of economic interest became pressing. Because the Brazilian biomes are being destroyed progressiv
Publicado em: 2005
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8. ASPECTS OF LATE SECOND TEMPLE JEWISH APOCALYPTIC: A CROSS-CULTURAL COMPARISON
Among the many difficulties raised by Second Temple Jewish apocalyptic literature (which include dating and original language of composition among other issues), one that stands out is that of the many visionary episodes described. Do they report genuine, first-hand experiences on the part of the writers, are they just a literary convention, or do they stand
Publicado em: 2005
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9. DEVELOPMENT OF METHODOLOGY FOR CALIBRATING PIEZOELECTRIC TRANSDUCERS USED IN INTERNAL BALLISTICS FOR TRANSIENT PRESSURE MEASUREMENTS / DESENVOLVIMENTO DE METODOLOGIA DE CALIBRAÇÃO DE TRANSDUTOR PIEZELÉTRICO DE PRESSÃO UTILIZADO EM BALÍSTICA INTERNA
The current research, of armaments industry`s interest, more specifically in the quality control of ammunition lots, is related to the development of methodology for calibrating piezoelectric transducers for transient pressure measurements associated with events whose duration is of the order of milliseconds. As its main contribution, this work presents prop
Publicado em: 2004
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10. Quantitative methods for management decisions in flight test campaigns for aeronautical certification.
Aircraft development process is characterized by high complexity and ever-decreasing lead times throughout for shortening time-to-market as an outcome.Development delays experienced in single systems, systems integration and the occurrence of design oscillations (design non compliances identified during flight tests that demand re-design and new test campaig
Publicado em: 2003
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11. O algoritmo auto-ajustavel no controle de processos com atraso de transporte variante no tempo
For many years there has been an Interest on controlJers that automatically update their own parameters when controlling compIex processes or when the operation conditions vary. This interest has increased the number of works in adaptive controI area. The generalized minimum variance controller (GMV) is included in these works and it uses the seIf-tuning app
Publicado em: 1992
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12. The pathology of human aortic valve homografts
Beta-propiolactone sterilized, freeze-dried aortic valve homografts offer a dead framework which is accepted by the host and is capable of immediate and full function. The survival time of such grafts as fully functional units may be limited by physical and chemical alterations produced in the tissues by sterilization and freeze-drying. The organizing reacti