Search

Your search keyword '"Shafie, Afza"' showing total 204 results
Start Over Author "Shafie, Afza"
204 results on '"Shafie, Afza"'

19. Independent Component Analysis for Filtering Airwaves in Seabed Logging Application

Author

Ansari, Adeel, Shafie, Afza Bt, Said, Abas B Md, and Ansari, Seema

Subjects
Computer Science - Other Computer Science, Physics - Geophysics
Abstract

Marine controlled source electromagnetic (CSEM) sensing method used for the detection of hydrocarbons based reservoirs in seabed logging application does not perform well due to the presence of the airwaves (or sea-surface). These airwaves interfere with the signal that comes from the subsurface seafloor and also tend to dominate in the receiver response at larger offsets. The task is to identify these air waves and the way they interact, and to filter them out. In this paper, a popular method for counteracting with the above stated problem scenario is Independent Component Analysis (ICA). Independent component analysis (ICA) is a statistical method for transforming an observed multidimensional or multivariate dataset into its constituent components (sources) that are statistically as independent from each other as possible. ICA-type de-convolution algorithm that is FASTICA is considered for mixed signals de-convolution and considered convenient depending upon the nature of the source and noise model. The results from the FASTICA algorithm are shown and evaluated. In this paper, we present the FASTICA algorithm for the seabed logging application., Comment: 7 pages, 13 figures

Published
2013

27. Automata for Modeling the Distributed Probabilistic Reversible Processes

Author

Arpit, Shafie, Afza, Wan Ahmad, Wan Fatimah, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Gupta, Prosenjit, editor, and Zaroliagis, Christos, editor

Published
2014
Full Text
View/download PDF

28. 'SynMax': A Mathematics Application Tool for Down Syndrome Children

Author

Shafie, Afza, Wan Ahmad, Wan Fatimah, Mohd., Nadhrah, Barnachea, Josefina Janier, Taha, M. Faisal, Yusuff, Rahmah Lob, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Zaman, Halimah Badioze, editor, Robinson, Peter, editor, Olivier, Patrick, editor, Shih, Timothy K., editor, and Velastin, Sergio, editor

Published
2013
Full Text
View/download PDF

29. A Simulation Study on Factors Affecting Airwaves Using Factorial Design

Author

Abdulkarim, Muhammad, Shafie, Afza, Wan Ahmad, Wan Fatimah, Razali, Radzuan, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Zaman, Halimah Badioze, editor, Robinson, Peter, editor, Olivier, Patrick, editor, Shih, Timothy K., editor, and Velastin, Sergio, editor

Published
2013
Full Text
View/download PDF

30. Comparison on Performance of Radial Basis Function Neural Network and Discriminant Function in Classification of CSEM Data

Author

Abdulkarim, Muhammad, Shafie, Afza, Razali, Radzuan, Wan Ahmad, Wan Fatimah, Arif, Agus, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Badioze Zaman, Halimah, editor, Robinson, Peter, editor, Petrou, Maria, editor, Olivier, Patrick, editor, Shih, Timothy K., editor, Velastin, Sergio, editor, and Nyström, Ingela, editor

Published
2011
Full Text
View/download PDF

31. Visual Learning in Application of Integration

Author

Bt Shafie, Afza, Barnachea Janier, Josefina, Bt Wan Ahmad, Wan Fatimah, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Badioze Zaman, Halimah, editor, Robinson, Peter, editor, Petrou, Maria, editor, Olivier, Patrick, editor, Schröder, Heiko, editor, and Shih, Timothy K., editor

Published
2009
Full Text
View/download PDF

39. Determination of Optimum Frequency for Electromagnetic-Assisted Nanofluid Core Flooding.

Author

Wahaab, Fatai A., Yahya, Noorhana, Shafie, Afza, Soleimani, Hassan, Rostami, Amir, and Ganeson, Menaka

Subjects
DIPOLE antennas, FINITE element method, ANTENNA radiation patterns, MAGNETIC coupling, RESERVOIR rocks
Abstract

The coupling of electromagnetic (EM) wave to nanoflooding experiments, termed EM-assisted nanoflooding has gained enormous attention in recent years. This brings about the consideration of transmitter efficiency and the propagation pattern of the ensuing EM wave, both of which depend on reservoir electromagnetic properties. However, this has not been considered in previous works, despite its potential to improve the efficiency of the process through energy maximization. Hence, this study considers the effects of reservoir EM properties on the operation of a transmitter. The EM properties of saturated reservoir rock samples were measured. Afterward, a half-wave dipole antenna was modeled in a cylindrical reservoir based on the measured EM properties. The EM propagation pattern of the antenna was simulated in a frequency range of 100 MHz—2.0 GHz using the finite element method. The antenna was found to display dual resonance (at 800 MHz and 1.3 GHz) for sandstone saturated with oil, brine and nanofluid. Application of the EM wave at resonance frequency can help increase the efficiency of EM-assisted nanoflooding. [ABSTRACT FROM AUTHOR]

Published
2019
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results