Results 31 to 40 of about 273,786 (182)
Localised edge‐region‐based active contour for medical image segmentation
IET Image Processing, 2021 Segmenting the region of interest (ROI) from medical images is a fundamental but challenging task due to the illumination change and imaging devices. Although many models based on the local region‐based active contour model (LR‐ACM) are proposed to deal ...
Hua‐Xiang Liu +3 more
doaj +1 more source
Abstract and Applied Analysis, 2014 We consider an optimal control problem subject to the terminal state equality constraint and continuous inequality constraints on the control and the state.
Xiangyu Gao, Xian Zhang, Yantao Wang
doaj +1 more source
, 2020 We introduce Bella, a locally superlinearly convergent Bregman forward backward splitting method for minimizing the sum of two nonconvex functions, one of which satisfying a relative smoothness condition and the other one possibly nonsmooth.
Ahookhosh, Masoud +2 more
core +1 more source
On the Convergence of a Smooth Penalty Algorithm without Computing Global Solutions
Journal of Applied Mathematics, 2012 We consider a smooth penalty algorithm to solve nonconvex optimization problem based on a family of smooth functions that approximate the usual exact penalty function.
Bingzhuang Liu +2 more
doaj +1 more source
Optimal Diffusion Learning Over Networks—Part I: Single-Task Algorithms
IEEE Open Journal of Signal Processing, 2022 We revisit the theory of distributed networks of cooperative agents under a broader perspective of diffusion adaptation, by exploiting proximity concepts.
Ricardo Merched
doaj +1 more source
, 2018 In this two-part study we develop a unified approach to the analysis of the global exactness of various penalty and augmented Lagrangian functions for finite-dimensional constrained optimization problems.
Dolgopolik, M. V.
core +2 more sources
Exact penalization, level function method, and modified cutting-plane method for stochastic programs with second order stochastic dominance constraints [PDF]
, 2013 Level function methods and cutting plane methods have been recently proposed to solve stochastic programs with stochastic second order dominance (SSD) constraints.
Meskarian, R., Sun, H., Wang, Y., Xu, H.
core +2 more sources
lra: A long read aligner for sequences and contigs.
PLoS Computational Biology, 2021 It is computationally challenging to detect variation by aligning single-molecule sequencing (SMS) reads, or contigs from SMS assemblies. One approach to efficiently align SMS reads is sparse dynamic programming (SDP), where optimal chains of exact ...
Jingwen Ren, Mark J P Chaisson
doaj +1 more source
Finite element models based on the approximation of discontinuous stress fields
Magazine of Civil Engineering, 2022 The paper develops the finite element method (FEM) in the form of the force method and in the mixed form for the calculation of structures. At present, the displacement-based finite element method is mainly used for engineering calculations. Stress-based
Lukashevich Anatoliy
doaj +1 more source
New Exact Penalty Functions for Nonlinear Constrained Optimization Problems [PDF]
Abstract and Applied Analysis, 2014 For two kinds of nonlinear constrained optimization problems, we propose two simple penalty functions, respectively, by augmenting the dimension of the primal problem with a variable that controls the weight of the penalty terms. Both of the penalty functions enjoy improved smoothness.
Liu, Bingzhuang, Zhao, Wenling
openaire +3 more sources