Results 21 to 30 of about 59,822 (239)

Extension of Modified Polak-Ribière-Polyak Conjugate Gradient Method to Linear Equality Constraints Minimization Problems [PDF]

open access: yes, 2014
Combining the Rosen gradient projection method with the two-term Polak-Ribière-Polyak (PRP) conjugate gradient method, we propose a two-term Polak-Ribière-Polyak (PRP) conjugate gradient projection method for solving linear equality constraints ...
Zhifeng Dai
core   +1 more source

Frequency optimization of laminated annular circular plates

open access: yesScience and Engineering of Composite Materials, 2013
This paper deals with frequency optimization of symmetrically laminated angle-ply annular circular plates. The design objective is the maximization of the fundamental frequency, and the design variable is the fiber orientation in the layers.
Topal Umut
doaj   +1 more source

A modified standard embedding with jumps in nonlinear optimization [PDF]

open access: yes, 2005
The paper deals with a combination of pathfollowing methods (embedding approach) and feasible descent direction methods (so-called jumps) for solving a non-linear optimization problem with equality and inequality constraints.
Nowack, Dieter   +3 more
core   +1 more source

Three-dimensional displacement field of the 2010 Mw 8.8 Maule earthquake from GPS and InSAR data with the improved ESISTEM-VCE method

open access: yesFrontiers in Earth Science, 2022
The 2010 Mw 8.8 Maule earthquake occurred offshore central Chile and ruptured ∼500 km along the megathrust fault resulting from the oceanic Nazca plate subducting beneath the continental South American plate. The Maule earthquake produced remnant crustal
Luyun Xiong   +10 more
doaj   +1 more source

Frequency optimization of laminated composite plates with different intermediate line supports

open access: yesScience and Engineering of Composite Materials, 2012
This paper deals with frequency optimization of symmetrically laminated 4-layered angle-ply plates with one or two different intermediate line supports. The design objective is the maximization of the fundamental frequency and the design variable is the ...
Topal Umut
doaj   +1 more source

Thermal buckling load optimization of laminated general quadrilateral and trapezoidal thin plates

open access: yesScience and Engineering of Composite Materials, 2013
This paper deals with thermal buckling load optimization of symmetrically laminated angle-ply general quadrilateral and trapezoidal thin plates. The objective function is to maximize the critical temperature capacity of the quadrilateral and trapezoidal ...
Topal Umut
doaj   +1 more source

Multiobjective Long-Term Generation Scheduling of Cascade Hydroelectricity System Using a Quantum-Behaved Particle Swarm Optimization Based on Decomposition

open access: yesIEEE Access, 2020
Multiobjective long-term generation scheduling (MOLTGS) plays a vital role in coordinating the contradiction between the generation and reliability of cascade hydroelectricity system (CHS).
Hu Hu, Kan Yang
doaj   +1 more source

The Pore Diffusion Coefficient of Iodide Ion in Rock Samples Using X-ray K-edge Imaging

open access: yesYankuang ceshi, 2023
BACKGROUNDThe diffusion process is important for environmental studies and pollution monitoring. When contaminants are released into groundwater in the natural environment, they can diffuse into pore water in the rock matrix driven by the concentration ...
Jiujiang ZHAO   +3 more
doaj   +1 more source

Use of population input functions for reduced scan duration whole-body Patlak 18F-FDG PET imaging

open access: yesEJNMMI Physics, 2021
Whole-body Patlak images can be obtained from an acquisition of first 6 min of dynamic imaging over the heart to obtain the arterial input function (IF), followed by multiple whole-body sweeps up to 60 min pi.
Joyce van Sluis   +5 more
doaj   +1 more source

High-resolution 3D MR Fingerprinting using parallel imaging and deep learning

open access: yesNeuroImage, 2020
MR Fingerprinting (MRF) is a relatively new imaging framework capable of providing accurate and simultaneous quantification of multiple tissue properties for improved tissue characterization and disease diagnosis.
Yong Chen   +5 more
doaj   +1 more source

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