Computational Complexity
Mostrando 13-24 de 184 artigos, teses e dissertações.
-
13. An Implementation of Self-Organizing Maps for Airfoil Design Exploration via Multi-Objective Optimization Technique
ABSTRACT Design candidates obtained from optimization techniques may have meaningful information, which provides not only the best solution, but also a relationship between object functions and design variables. In particular, trade-off studies for optimum airfoil shape design involving various objectives and design variables require the effective analysis t
J. Aerosp. Technol. Manag.. Publicado em: 2016-06
-
14. INTERAÇÕES FÁRMACO-RECEPTOR: APLICAÇÕES DE TÉCNICAS COMPUTACIONAIS EM AULA PRÁTICA SOBRE A EVOLUÇÃO DOS INIBIDORES DA ENZIMA CONVERSORA DE ANGIOTENSINA
Teaching classes and events regarding the molecular aspects of drug-receptor interactions is not an easy task. The ligand stereochemistry and the spatial arrangement of the macromolecular targets highly increase the complexity of the process. In this context, the use of alternative and more playful approaches could allow students to gain a more thorough unde
Quím. Nova. Publicado em: 2015-09
-
15. Analyzing the Unscented Kalman Filter Robustness for Orbit Determination Through Global Positioning System Signals
ABSTRACT: The nonlinear unscented Kalman filter (UKF) is evaluated for the satellite orbit determination problem, using Global Positioning System (GPS) measurements. The assessment is based on the robustness of the filter. The main subjects for the evaluation are convergence speed and dynamical model complexity. Such assessment is based on comparing the UKF
J. Aerosp. Technol. Manag.. Publicado em: 2013-12
-
16. Nonlinear effects compensation in Optical Coherent PDM-QPSK Systems
Nonlinear effects has been appointed as the main limitation in coherent optical fiber transmission. Digital Back-Propagation algorithms and Maximum Likelihood Sequence Estimation are two of the current studied methods to cope with such impairment and extend the systems maximum reach. In this article, we analyzed both methods in a 112 Gb/s Dual Polarization Q
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2013-12
-
17. A complexidade e o construtivismo na economia
Complexity and constructivism in economics. This paper attempts to show and summarize the concept of rules, order and complexity introduced around the mid-twentieth century by Friedrich August von Hayek. It also attempts to create a current parallel between those concepts and the field of complexity economics. At the time of his writings, the author sought t
Brazil. J. Polit. Econ.. Publicado em: 2013-09
-
18. Optimizing similarity queries in metric spaces meeting user\ s expectation / Otimização de operações de busca por similaridade em espaços métricos
The complexity of data stored in large databases has increased at very fast paces. Hence, operations more elaborated than traditional queries are essential in order to extract all required information from the database. Therefore, the interest of the database community in similarity search has increased significantly. Two of the well-known types of similarit
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/10/2012
-
19. Evolving granular systems = : Sistemas granulares evolutivos / Sistemas granulares evolutivos
In recent years there has been increasing interest in computational modeling approaches to deal with real-world data streams. Methods and algorithms have been proposed to uncover meaningful knowledge from very large (often unbounded) data sets in principle with no apparent value. This thesis introduces a framework for evolving granular modeling of uncertain
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/07/2012
-
20. Estimação e previsão da estrutura a termo das taxas de juros usando técnicas de inteligência computacional / Term structure of interest rate modeling and forecasting using computational intelligence techniques
This work proposes the term structure of interest rates modeling and forecasting using computational intelligence techniques, based on data from the US and Brazilian fixed income markets. The yield curve modeling includes the use of some evolutionary computation methods like Genetic Algorithms, Differential Evolution and Evolution Strategies in comparison wi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/06/2012
-
21. Aplicação de redes neurais artificiais no processo de ajuste de histórico / Application of artificial neural networks in the history matching process
The history matching process is one of the most important stages involving studies of reservoirs, because with the adjusted reservoir model, the production forecasts can be done with higher reliability and different production strategies can be evaluated to obtain greater final recovery associated with less costs. However, this process have several problems
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/05/2012
-
22. Modelagem computacional do efeito bystander das radiações ionizantes via autômato celular e técnica Monte Carlo
Until the 1990s it was believed that the DNA was the only target molecule of ionizing radiation. But some observations have questioned this theory. In 1992, the bystander effect was described by Nagasawa and Little. This effect is responsible for a series of answers as death, chromosomal instability or other abnormalities that occur in non-irradiated cells,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2012
-
23. Leitura, tradução e medidas de complexidade textual em contos da literatura para leitores com letramento básico
This work analyzes textual complexity and readability patterns from a computational perspective, situating the problem through the description of original and translated texts, based on Translation Studies, Corpus Linguistics and Natural Language Processing theoretical postulates. We investigated the hypothesis that there are English literature translations
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
-
24. Composição automatizada de serviços geográficos baseada em requisitos de qualidade de geodados / Automated composition of geospatial services based on geodata quality requirements
The Service-Oriented Architecture represents a new paradigm for development of GIS applications, allowing to share computational resources between institutions in a distributed computing environment. The implementation of these applications can be accomplished through the building of service compositions, a procedure for aggregate functionalities implemented
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/10/2011