Search Results - "Alecsa, Cristian"

Breast Cancer Diagnosis by Surface-Enhanced Raman Scattering (SERS) of Urine by Moisoiu, Vlad, Socaciu, Andreea, Stefancu, Andrei, Iancu, Stefania, Boros, Imre, Alecsa, Cristian, Rachieriu, Claudiu, Chiorean, Angelica, Eniu, Daniela, Leopold, Nicolae, Socaciu, Carmen, Eniu, Dan

“…Background: There is an ongoing research for breast cancer diagnostic tools that are cheaper, more accurate and more convenient than mammography. Methods: In…”
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SERS assessment of the cancer-specific methylation pattern of genomic DNA: towards the detection of acute myeloid leukemia in patients undergoing hematopoietic stem cell transplantation by Moisoiu, Vlad, Stefancu, Andrei, Iancu, Stefania D., Moisoiu, Tudor, Loga, Luminita, Dican, Lucia, Alecsa, Cristian D., Boros, Imre, Jurj, Anca, Dima, Delia, Bagacean, Cristina, Tetean, Romulus, Burzo, Emil, Tomuleasa, Ciprian, Elec, Florin, Leopold, Nicolae

“…In this label-free surface-enhanced Raman scattering (SERS) study of genomic DNA, we demonstrate that the cancer-specific DNA methylation pattern translates…”
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Some variants of Ćirić’s multi-valued contraction principle by Alecsa, Cristian Daniel, Petruşel, Adrian

“…In this article, a study of the fixed point problem for Ćirić type multi-valued operators is presented. More precisely, some variants ofĆirić’s contraction…”
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The rate of convergence of optimization algorithms obtained via discretizations of heavy ball dynamical systems for convex optimization problems by Alecsa, Cristian Daniel

“…In this paper, we propose new numerical algorithms in the setting of unconstrained optimization problems and we prove the discrete rate of convergence of order…”
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New optimization algorithms for neural network training using operator splitting techniques by Alecsa, Cristian Daniel, Pinţa, Titus, Boros, Imre

“…In the following paper we present a new type of optimization algorithms adapted for neural network training. These algorithms are based upon sequential…”
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Approximating fixed points for nonlinear generalized mappings using Ishikawa iteration by Alecsa, Cristian Daniel

“…We obtain a contractive condition for the existence and uniqueness of fixed points for a generalized contraction-type mapping. The present study focuses on…”
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Some fixed point results regarding convex contractions of Presić type by Alecsa, Cristian Daniel

“…In the present paper, we introduce new types of Presić operators. These operators generalize the well-known Istrăţescu mappings, known as convex contractions…”
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An Extension of the Second Order Dynamical System that Models Nesterov’s Convex Gradient Method by Alecsa, Cristian Daniel, László, Szilárd Csaba, Pinţa, Titus

“…In this paper we deal with a general second order continuous dynamical system associated to a convex minimization problem with a Fréchet differentiable…”
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Numerical benchmark study for flow in highly heterogeneous aquifers by Alecsa, Cristian D., Boros, Imre, Frank, Florian, Knabner, Peter, Nechita, Mihai, Prechtel, Alexander, Rupp, Andreas, Suciu, Nicolae

“…•Heterogeneous aquifers are modeled with log-normal random conductivity fields.•Numerical schemes are tested on two-dimensional benchmark flow problems.•Code…”
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A gradient-type algorithm with backward inertial steps associated to a nonconvex minimization problem by Alecsa, Cristian Daniel, László, Szilárd Csaba, Viorel, Adrian

“…We investigate an algorithm of gradient type with a backward inertial step in connection with the minimization of a nonconvex differentiable function. We show…”
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Some notes concerning a generalized KMM-type optimization method for density ratio estimation by Alecsa, Cristian Daniel

“…In the present paper we introduce new optimization algorithms for the task of density ratio estimation. More precisely, we consider extending the well-known…”
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OF-AE: Oblique Forest AutoEncoders by Alecsa, Cristian Daniel

“…In the present work we propose an unsupervised ensemble method consisting of oblique trees that can address the task of auto-encoding, namely Oblique Forest…”
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A theoretical and empirical study of new adaptive algorithms with additional momentum steps and shifted updates for stochastic non-convex optimization by Alecsa, Cristian Daniel

“…It is known that adaptive optimization algorithms represent the key pillar behind the rise of the Machine Learning field. In the Optimization literature…”
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The long time behavior and the rate of convergence of symplectic convex algorithms obtained via splitting discretizations of inertial damping systems by Alecsa, Cristian Daniel

“…In this paper we propose new numerical algorithms in the setting of unconstrained optimization problems and we study the rate of convergence in the iterates of…”
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Sequences of contractions on cone metric spaces over Banach algebras and applications to nonlinear systems of equations and systems of differential equations by Alecsa, Cristian Daniel

“…It is well known that fixed point problems of contractive-type mappings defined on cone metric spaces over Banach algebras are not equivalent to those in usual…”
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On Using Perceptual Loss within the U-Net Architecture for the Semantic Inpainting of Textile Artefacts with Traditional Motifs by Stoean, Catalin, Bacanin, Nebojsa, Stoean, Ruxandra, Ionescu, Leonard, Alecsa, Cristian, Hotoleanu, Mircea, Atencia, Miguel, Joya, Gonzalo

“…It is impressive when one gets to see a hundreds or thousands years old artefact exhibited in the museum, whose appearance seems to have been untouched by…”
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New optimization algorithms for neural network training using operator splitting techniques by Alecsa, Cristian Daniel, Pinta, Titus, Boros, Imre

“…In the following paper we present a new type of optimization algorithms adapted for neural network training. These algorithms are based upon sequential…”
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An extension of the second order dynamical system that models Nesterov's convex gradient method by Alecsa, Cristian Daniel, László, Szilárd Csaba, Pinţa, Titus

“…In this paper we deal with a general second order continuous dynamical system associated to a convex minimization problem with a Fr\`echet differentiable…”
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Benchmark for numerical solutions of flow in heterogeneous groundwater formations by Alecsa, Cristian D, Boros, Imre, Frank, Florian, Knabner, Peter, Nechita, Mihai, Prechtel, Alexander, Rupp, Andreas, Suciu, Nicolae

“…This article presents numerical investigations on accuracy and convergence properties of several numerical approaches for simulating steady state flows in…”
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