Non Deterministic Models
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Estudo de modelos e condições iniciais da geração a priori de detritos espaciais e sua propagação orbital / Study of models and initial conditions of a priori generation of space debris and their orbital propagation
Currently, it is estimated that there are hundreds of thousands of space debris, of various sizes, around the Earth. The space debris, also known as orbital debris, can remain in orbit with other bodies for a long time; and can cause risks of collision, including with space vehicles still in operation. In addition, there are risks of potential accidents by r
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/04/2011
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2. Sistemas de partículas interagentes dependentes de tipo e aplicações ao estudo de redes de sinalização biológica / Type-dependent interacting particle systems and their applications in the study of signaling biological networks
We study type-dependent stochastic spin models proposed by Fernández et al., which were used to model biological signaling networks. The original modeling setup describes the macroscopic evolution of a finite-size spin-flip model with k types of spins with arbitrary number of internal states interacting through a non-reversible stochastic dynamics. In the t
Publicado em: 2011
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3. An approach to incompletely specified finite state machine minimization / Uma estratégia para a minimização de máquinas de estados finitos parciais
Finite State Machines are largely used on Software Engineering to model systems specifications. In these models, designers may inadvertently include redundant states, i.e., states which exhibit the same input/output behavior. The absence of such states brings benefits to the modeling activities, reducing the complexity and taking less physical resources on i
Publicado em: 2009
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4. UMA ABORDAGEM BAYESIANA PARA O CÁLCULO DOS CUSTOS OPERACIONAIS EFICIENTES DAS DISTRIBUIDORAS DE ENERGIA ELÉTRICA / A BAYESIAN APPROACH TO ESTIMATE THE EFFICIENT OPERATIONAL COSTS OF ELECTRICAL ENERGY UTILITIES
This thesis presents the main results of the cost efficiency scores of 60 Brazilian electricity distribution utilities. Based on yardstick competition scheme, it was applied a Kohonen Neural Networks (KNN) to identify and to group the similar utilities. The KNN results are not deterministic, since the estimated weights are randomly initialized. Thus, a Monte
Publicado em: 2008
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5. Modelo de von Bertalanffy generalizado aplicado a curvas de crescimento animal / Generalized von Bertalanffy model applied to growth animal curves
The objective of this work is to study the curve of growth in weight of several animaIs specimens, to establish standards of metabolism for animal class. The parameters of the non-linear generalized form of the von Bertalanffy mo deI applied to weight growth curves were adjusted to identify with ones describe better the growth of the animal on the areas of a
Publicado em: 2008
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6. Dinâmicas emergentes na família de memórias associativas bidirecionais caóticas e sua habilidade para saltar passos / Emergent dynamics in family of chaotic bidirectional associative memories and its ability to skip steps
In this thesis, a family of bidirectional associative memories (C-BAM family) is proposed, implemented and tested to extend the study of chaotic phenomenon in associative models. In the C-BAM model, all the original neurons of bidirectional associative memory (BAM), BAM with delay and exponenetial BAM (eBAM) were substituted for chaotic neurons. Based on the
Publicado em: 2006
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7. Análise de Vibrações em Pontes Rodoviárias Induzidas pelo Tráfego de Veículos sobre Pavimentos Irregulares / Vibration Analysis of Highway Bridges Induced by the Vehicle Traffic on Irregular Pavement Surface
Nesta dissertação, propõe-se uma metodologia para a analise da resposta dinâmica de pontes rodoviárias devido à travessia de comboios de diversos tipos de veículos sobre o tabuleiro irregular dessas obras de arte. Para tal, desenvolve-se uma análise paramétrica extensa com o objetivo de avaliarem-se os efeitos dinâmicos provenientes das irregularid
Publicado em: 2006
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8. Modelo computacional para determinação do risco econômico em culturas irrigadas / Computational model for economical risk determination in irrigated cultures
The agricultural companies were submitted to risky conditions, so the utility of deterministic models to planning is relatively limited. That implies in not despise the randomness of some coefficients and to introduce them in the project analysis. As a proposal of this work a Computational model for risk determination in irrigated cultures was elaborated for
Publicado em: 2005
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9. Analytical results for the statistical distribution related to a memoryless deterministic walk: Dimensionality effect and mean-field models / "Resultados analíticos para as distribuições estatísticas relacionadas à caminhada determinista do turista sem memória: efeito da dimensionalidade do sistema e modelos de campo médio".
Consider a medium characterized by $N$ points whose coordinates are randomly generated by a uniform distribution along the unitary edges of a $d$-dimensional hypercube. A walker leaves from each point of this disordered medium and moves according to the deterministic rule to go the nearest point which has not been visited in the preceding $mu$ steps. This pr
Publicado em: 2004
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10. MONITORAMENTO DA INSTRUMENTAÇÃO DA BARRAGEM DE CORUMBÁ I POR REDES NEURAIS E MODELOS DE BOX &JENKINS / MONITORING OF THE CORUMBÁ-I DAM INSTRUMENTATION BY NEURAL NETWORKS AND THE BOX &JENKINSNULL MODELS
In this work, artificial neural networks and the Box &Jenkins models (1970) were used for analysis, modeling and forecasts of water discharges and pressure head development in the Corumbá-I dam, owned by Furnas Centrais Elétricas, from the instrumentation data recorded since 1997. Prediction of the probable values can be a powerful tool for early detection
Publicado em: 2003
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11. Modelagem deterministica de reatores de lama cataliticos trifasicos
The principal aim of this work was the development of a software capable to represent via deterministic modelling the dynamic behaviour of three-phase slurry catalytic reactors. Intending to achieve a realistic representation of the system, detailed models are utilized. They consist of mass and heat balance equations for the catalyst particles as well as for
Publicado em: 2003
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12. 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