Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Jose F. L. de Oliveira"'
Autor:
Wesley L. Passos, Jose F. L. de Oliveira, Anthony Y.Y. Ji, Lucas Pinheiro Cinelli, Rafael Padilla, Eduardo A. B. da Silva, Patrick F. Braz, Domenica P. Dalvi, Felipe Lima De Oliveira, Breno L Galves, Clemente Gonçalves, Sergio L. Netto, Gabriela Lewenfus, Vinicius Pinho, Marcello L. R. de Campos, Jonathas O. Ferreira
Publikováno v:
Journal of Petroleum Science and Engineering. 205:108939
This work addresses the problem of extracting events from human-written daily drilling reports (DDRs) in an automated way. Two distinct approaches based on an expert system and artificial intelligence techniques are proposed: rule-based language proc
Publikováno v:
International Journal of Mineral Processing. 143:34-38
The beneficiation of phosphate ores by froth flotation is the most efficient process used to separate apatite from calcium minerals. However, the similarity of surface properties between apatite and calcite generally leads to non-selective adsorption
Autor:
Thiago de M. Prego, Eduardo A. B. da Silva, Sergio L. Netto, Jose F. L. de Oliveira, Alessandro J. S. Dutra
Publikováno v:
Digital Signal Processing. 34:67-73
Frequency-estimation algorithms devised for complex sinusoids, including the maximum-likelihood (ML) approach, when operating on real sinusoidal signals, suffer from spectral interference due to the superposition of the aliasing components at negativ
Autor:
Gustavo de Deus, Jose F. L. de Oliveira, Fernando Costa e Silva Filho, João Galan, Alex Balduino Souza, Rodrigo Derossi Cabreira, Fátima Namen
Publikováno v:
Materials Research, Volume: 11, Issue: 3, Pages: 239-243, Published: SEP 2008
Materials Research v.11 n.3 2008
Materials research (São Carlos. Online)
Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
Materials Research, Vol 11, Iss 3, Pp 239-243 (2008)
Materials Research v.11 n.3 2008
Materials research (São Carlos. Online)
Universidade Federal de São Carlos (UFSCAR)
instacron:ABM ABC ABPOL
Materials Research, Vol 11, Iss 3, Pp 239-243 (2008)
Received: January 28, 2007; Revised: August 11, 2008Objective: Earlier studies on some dental materials measured roughness and/or contact angles or fluoride release separately. In the present study, five dental polymers were investigated to ascertain
Autor:
M.C. Brum, Jose F. L. de Oliveira
Publikováno v:
Minerals Engineering. 20:945-949
Humic acid (HA) is an ubiquitous substance in the earth environment and is very important regarding soil fertility. It has been shown that HA can be used as a depressant for hematite in iron ore flotation. However, its removal from water is important
Publikováno v:
Minerals Engineering. 20:1003-1007
In the present work the utilization of humic acid as a depressant for hematite in the iron ore flotation process was studied taking into consideration its physicochemical properties. Contact angle measurements of hematite and quartz were performed us
Publikováno v:
Journal of Dispersion Science and Technology. 25:229-237
The adsorption of colloidal gold onto glass surfaces previously treated with bifunctional silanes was studied aiming to enhance the recovery of colloidal gold particles from process water in the mining industry. Colloidal gold samples were prepared v
Publikováno v:
Minerals Engineering. 17:425-430
In the potash production industry, sylvite is selectively floated from halite with the use of cationic collectors. Due to the high solubility of the KCl and NaCl minerals, the process has to be conducted in saturated brines of these salts and at very
Publikováno v:
Journal of Dispersion Science and Technology. 23:837-844
The preparation of colloidal gold is a subject of practical interest in many technological fields. It is generally accomplished by reduction of HAuCl4 solution with sodium citrate which is known to be influenced by several factors such as temperature
Publikováno v:
Minerals Engineering. 14:99-105
The niobium mineral deposits in Brazil account for more than 70% of the world's known reserves. Currently flotation of pyrochlore is carried out in the Araxa plant using amines as collector at low pH, in the presence of NaF as an activator and with t