Results 31 to 40 of about 8,190 (293)

A novel algorithm for multiplicative speckle noise reduction in ex vivo human brain OCT images

open access: yesNeuroImage, 2022
Optical coherence tomography (OCT) images of ex vivo human brain tissue are corrupted by multiplicative speckle noise that degrades the contrast to noise ratio (CNR) of microstructural compartments.
Divya Varadarajan   +5 more
doaj   +1 more source

Robust 3D point cloud registration based on bidirectional Maximum Correntropy Criterion. [PDF]

open access: yesPLoS ONE, 2018
This paper presents a robust 3D point cloud registration algorithm based on bidirectional Maximum Correntropy Criterion (MCC). Comparing with traditional registration algorithm based on the mean square error (MSE), using the MCC is superior in dealing ...
Xuetao Zhang, Libo Jian, Meifeng Xu
doaj   +1 more source

Sparse Multicategory Generalized Distance Weighted Discrimination in Ultra-High Dimensions

open access: yesEntropy, 2020
Distance weighted discrimination (DWD) is an appealing classification method that is capable of overcoming data piling problems in high-dimensional settings. Especially when various sparsity structures are assumed in these settings, variable selection in
Tong Su   +8 more
doaj   +1 more source

Adaptive Elastic Net Based on Modified PSO for Variable Selection in Cox Model With High-Dimensional Data: A Comprehensive Simulation Study

open access: yesIEEE Access, 2023
In contemporary research, high-dimensional data has become more popular in many scientific fields with the rapid advancement of technology in collecting and storing large datasets.
Nuriye Sancar   +3 more
doaj   +1 more source

Generalized logarithmic penalty function method for solving smooth nonlinear programming involving invex functions

open access: yesArab Journal of Basic and Applied Sciences, 2019
In this paper, we have reviewed some penalty function methods for solving constrained optimization problems in the literature and proposed a continuously differentiable logarithmic penalty function which consists of the proposed logarithmic penalty ...
Mansur Hassan, Adam Baharum
doaj   +1 more source

Evolutionary Based ICA With Reference for EEG $\mu$ Rhythm Extraction

open access: yesIEEE Access, 2018
Independent component analysis with reference (ICA-R), a paradigm of constrained ICA (cICA), incorporates textita priori information about the desired sources as reference signals into the contrast function of ICA.
Swathi Sri Kavuri   +2 more
doaj   +1 more source

Community Detection of Multi-Layer Attributed Networks via Penalized Alternating Factorization

open access: yesMathematics, 2020
Communities are often associated with important structural characteristics of a complex network system, therefore detecting communities is considered to be a fundamental problem in network analysis.
Jun Liu, Jiangzhou Wang, Binghui Liu
doaj   +1 more source

Fuzzy Real-Time Optimization of the Tennessee Eastman Challenge Process [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2011
A Real-Time Optimization (RTO) strategy incorporating the fuzzy sets theory is developed, where the problem constraints obtained from process considerations are treated in fuzzy environment. Furthermore, the objective function is penalized by a fuzzified
Masoud Golshan   +3 more
doaj  

An iterative optimization scheme to accommodate inequality constraints in air quality geostatistical estimation of multivariate PM

open access: yesHeliyon, 2023
The kriging-based estimation of the different types of atmospheric particulate matter (PM) pollutions defined in the air quality regulation raises some operational problems because the (co)kriging equations are obtained by minimizing a linear combination
Maxime Beauchamp, Bertrand Bessagnet
doaj   +1 more source

Sparse Graph Learning Under Laplacian-Related Constraints

open access: yesIEEE Access, 2021
We consider the problem of learning a sparse undirected graph underlying a given set of multivariate data. We focus on graph Laplacian-related constraints on the sparse precision matrix that encodes conditional dependence between the random variables ...
Jitendra K. Tugnait
doaj   +1 more source

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