Results 51 to 60 of about 10,265,072 (333)

A Benchmark Study on Steepest Descent and Conjugate Gradient Methods-Line Search Conditions Combinations in Unconstrained Optimization

Croatian Operational Research Review, 2022
In this paper, it is aimed to computationally conduct a performance benchmarking for the steepest descent and the three well-known conjugate gradient methods (i.e., Fletcher-Reeves, Polak- Ribiere and Hestenes-Stiefel) along with six different step ...
Kadir Kiran
doaj  

An Improved Modification of Accelerated Double Direction and Double Step-Size Optimization Schemes

Mathematics, 2022
We propose an improved variant of the accelerated gradient optimization models for solving unconstrained minimization problems. Merging the positive features of either double direction, as well as double step size accelerated gradient models, we define ...
Milena J. Petrović, Dragana Valjarević, Dejan Ilić, Aleksandar Valjarević, Julija Mladenović   +4 more
doaj   +1 more source

A search for 21 cm HI absorption in AT20G compact radio galaxies [PDF]

, 2012
We present results from a search for 21 cm associated HI absorption in a sample of 29 radio sources selected from the Australia Telescope 20 GHz survey. Observations were conducted using the Australia Telescope Compact Array Broadband Backend, with which
Allison, J. R., Curran, S. J., Emonts, B. H. C., Gareb, K., Mahony, E. K., Reeves, S., Sadler, E. M., Tanna, A., Whiting, M. T., Zwaan, M. A.   +9 more
core   +2 more sources

Denoising Colour Images Corrupted by Salt-and-Pepper Noise: Weighted Mean Filter With Iterative Approach and Deep Learning Modeling

IEEE Access
Image denoising has long been one of the most important and challenging problem in image processing, especially in the presence of high noisy levels. Considerable effort has been devoted to the development of effective denoising approaches. Over the past
Mahmoud M. Yahaya, Poom Kumam, Kanokwan Sitthithakerngkiet   +2 more
doaj   +1 more source

BATSE Gamma-Ray Burst Line Search: V. Probability of Detecting a Line in a Burst

, 1997
The physical importance of the apparent discrepancy between the detections by pre-BATSE missions of absorption lines in gamma-ray burst spectra and the absence of a BATSE line detection necessitates a statistical analysis of this discrepancy.
D. L. Band, G. N. Pendleton, J. L. Matteson, L. A. Ford, M. S. Briggs, Murakami T., R. D. Preece, W. S. Paciesas   +7 more
core   +2 more sources

BATSE Gamma-Ray Burst Line Search. III. Line Detectability [PDF]

The Astrophysical Journal, 1995
21 pages including tables, AASTeX, 8 figures on request from dband@ucsd ...
Band, D. L., Ford, L. A., Matteson, J. L., Briggs, M. S., Paciesas, W. S., Pendleton, G. N., Preece, R. D., Palmer, D. M., Teegarden, B. J., Schaefer, B. E.   +9 more
openaire   +2 more sources

The global convergence of the Polak-Ribière-Polyak conjugate gradient algorithm under inexact line search for nonconvex functions

Journal of Computational and Applied Mathematics, 2019
Powell (1984) and Dai (2003) constructed respectively a counterexample to show that the Polak–Ribiere–Polyak (PRP) conjugate gradient algorithm fails to globally converge for nonconvex functions even when the exact line search technique is used, which ...
Gonglin Yuan, Zengxin Wei, Yuning Yang
semanticscholar   +1 more source

Improved Fletcher-Reeves and Dai-Yuan conjugate gradient methods with the strong Wolfe line search

Journal of Computational and Applied Mathematics, 2019
The conjugate gradient methods (CGMs) are very effective iterative methods for solving large-scale unconstrained optimization. The aim of this work is to improve the Fletcher–Reeves and Dai–Yuan CGMs.
Xianzhen Jiang, J. Jian
semanticscholar   +1 more source

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen, Calogero Virgone, Antje Redlich, Michael Abele, Ricardo Lopez‐Almaraz, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Maja Mazic Cesen, Andrea Ferrari, Malgorzata A. Krawczyk, Yves Reguerre, Dominik T. Schneider, Ines B. Brecht, Charlotte Rigaud, Bilgehan Yalcin, Rainer Claus, Christian Vokuhl, Constantin Lapa, Jörg Fuchs, Segolene Hescot, Thomas Walter, Julien Hadoux, Daniel Orbach   +23 more
wiley   +1 more source

Priming of Pop-Out Does not Affect the Shooting Line Illusion [PDF]

, 1996
We combined a shooting-line illusion with a visual search pop-out task in an effort to determine whether priming of pop-out was due to acceleratcd processing of visual information in the primed dimension.
Gancarz, Gregory, Wolfe, Jeremy
core   +1 more source