Qr Factorization
Mostrando 1-7 de 7 artigos, teses e dissertações.
-
1. Fatoração QR como ferramenta para a determinação de poços principais em redes de monitoramento de aqüíferos freáticos
Monitoring networks of piezometric motion are increasingly used for evaluation and management of aquifers. A pivoted version of the QR factorization was used in four networks, with the purpose of determining principal wells. One network is located at river Jardim watershed, at the east portion of Distrito Federal, Brazil, and the other three are located in s
Publicado em: 2008
-
2. Um estudo sobre fatorações de matrizes e a resolução de sistemas lineares / A study on matrix factorization and the resolution of linear systems
Neste trabalho abordamos algumas fatorações de matrizes, com vistas à resolução de sistemas lineares através de métodos diretos. Enfocamos particularmente as decomposições LU, Cholesky e QR, cujo uso tem sido largamente difundido em implementações computacionais. Nosso objetivo é apresentar um texto didático, acessível a alunos de graduação,
Publicado em: 2008
-
3. Development of software for data reconciliation of chemical and petrochemical processes / Desenvolvimento de um software para reconciliação de dados de processos quimicos e petroquimicos
The purpose of this work is the development of computational routines for conditioning chemical process data in order to represent the process behavior as reliable as possible. Reliable process description is fundamental for any control or optimization system development, since they respond to the process measurements (its description). Thus, data conditioni
Publicado em: 2003
-
4. Estimação estatica de estado em sistemas de energia eletrica utilizando fatoração ortogonal QR
This work is concerned with computational aspects of the problem of static state estimation and bad data processing, in electrical power systems, using the nonlinear weighted least-squares technique. Modified Newton type methods, for solution of the nonlinear least-squares problem, are briefly presented and analysed. For solution of the sequence of linear le
Publicado em: 1994
-
5. Identificação adaptativa de sistemas atraves de minimos quadrados lineares utilizando fatoração QR e janela movel de dados
This work deals with the numerical solution of linear least-squares problems for adaptive identification of time-varying systems. Traditional recursive algorithms using normal equations and exponential data weighting are analysed and their numerical drawbacks for solution of ill-conditioned least-squares problems are pointed out. It is proposed a new recursi
Publicado em: 1993
-
6. Evolutionary profiles from the QR factorization of multiple sequence alignments
We present an algorithm to generate complete evolutionary profiles that represent the topology of the molecular phylogenetic tree of the homologous group. The method, based on the multidimensional QR factorization of numerically encoded multiple sequence alignments, removes redundancy from the alignments and orders the protein sequences by increasing linear
National Academy of Sciences.
-
7. On the Evolution of Structure in Aminoacyl-tRNA Synthetases
The aminoacyl-tRNA synthetases are one of the major protein components in the translation machinery. These essential proteins are found in all forms of life and are responsible for charging their cognate tRNAs with the correct amino acid. The evolution of the tRNA synthetases is of fundamental importance with respect to the nature of the biological cell and
American Society for Microbiology.