Results 21 to 30 of about 174,537,063 (257)

Effectiveness and safety of transcatheter aortic valve replacement in elderly people with severe aortic stenosis with different types of heart failure

BMC Cardiovascular Disorders, 2023
Background Impaired left ventricular function is an independent predictor of adverse clinical outcomes in patients with aortic stenosis. The aim of this study is to evaluate the short-term changes of echocardiographic parameters, New York Heart ...
Mei Dong, Lizhen Wang, Gary Tse, Tao Dai, Lihong Wang, Zhicheng Xiao, Tong Liu, Faxin Ren   +7 more
doaj   +1 more source

Nonlinear Conjugate Gradient Methods with Wolfe Type Line Search [PDF]

, 2013
Nonlinear conjugate gradient method is one of the useful methods for unconstrained optimization problems. In this paper, we consider three kinds of nonlinear conjugate gradient methods with Wolfe type line search for unstrained optimization problems ...
Yuan-Yuan Chen, Shou-Qiang Du
core   +1 more source

Exploring the Charge Compensation Mechanism of P2-Type Na_0.6Mg_0.3Mn_0.7O₂ Cathode Materials for Advanced Sodium-Ion Batteries

Energies, 2020
P2-type sodium layered transition metal oxides have been intensively investigated as promising cathode materials for sodium-ion batteries (SIBs) by virtue of their high specific capacity and high operating voltage.
Chen Cheng, Manling Ding, Tianran Yan, Kehua Dai, Jing Mao, Nian Zhang, Liang Zhang, Jinghua Guo   +7 more
doaj   +1 more source

Learning Supervised PageRank with Gradient-Based and Gradient-Free Optimization Methods [PDF]

, 2016
In this paper, we consider a non-convex loss-minimization problem of learning Supervised PageRank models, which can account for features of nodes and edges. We propose gradient-based and random gradient-free methods to solve this problem.
Dvurechensky, Pavel, Gusev, Gleb, Nesterov, Yurii, Raigorodskii, Andrei M., Tikhonov, Aleksey, Bogolubsky, Lev, Gasnikov, Alexander, Zhukovskii, Maksim   +7 more
core   +1 more source

Fabrication of functional surfaces using layer height method in material extrusion type 3D printing

Journal of Materials Research and Technology
Various layer stacking methods have been employed in material extrusion type three-dimensional (3D) printing to utilize their potential for addressing the inherent technological limitation of reduced surface quality due to layer stacking.
Jaebum Sung, Yeongu Choi, Hongyun So
doaj   +1 more source

Reduced coronary collateralization in type 2 diabetic patients with chronic total occlusion

Cardiovascular Diabetology, 2018
Background The extent of coronary collateral formation is a primary determinant of the severity of myocardial damage and mortality after coronary artery occlusion.
Ying Shen, Feng Hua Ding, Yang Dai, Xiao Qun Wang, Rui Yan Zhang, Lin Lu, Wei Feng Shen   +6 more
doaj   +1 more source

Electric Power Loss Minimization in Power Supply Systems for the Suburban Houses [PDF]

Problems of the Regional Energetics, 2018
The main purpose of the research is the development and improvement of methods for minimizing power losses for non-sinusoidal and asymmetric modes of operation of power supply systems for suburban houses.
Averbukh М.А., Zhilin Е.V., Prokopishin D.I.   +2 more
doaj   +1 more source

Inexact reduced gradient methods in nonconvex optimization [PDF]

, 2022
This paper proposes and develops new linesearch methods with inexact gradient information for finding stationary points of nonconvex continuously differentiable functions on finite-dimensional spaces.
Khanh, Pham Duy, Tran, Dat Ba, Mordukhovich, Boris S.   +2 more
core  

Medium term follow-up after percutaneous pulmonary valve replacement with the Melody® valve

International Journal of Cardiology: Heart & Vasculature, 2015
Introduction: Data on long term function of the Melody valve are scarce. Patients and methods: single institution; results of percutaneous pulmonary valve implantation (PPVI) from 2006 to 2014.
Bjorn Cools, Werner Budts, Ruth Heying, Derize Boshoff, Benedicte Eyskens, Stefan Frerich, Els Troost, Marc Gewillig   +7 more
doaj   +1 more source

Retrospective Analysis of Donor Lymphocyte Infusions in Pediatric Patients With Mixed Chimerism After Hematopoietic Stem Cell Transplantation

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Allogeneic hematopoietic stem cell transplantation (alloHSCT) is an essential therapy for several malignant and nonmalignant diseases, but relapse and graft loss remain the principal threats to its success. Routine monitoring of chimerism and minimal residual disease (MRD) enables early detection of imminent recurrence and guides ...
Carmen Junk, Sebastian Michaelis, Michaela Döring, Thomas Eichholz, Ursula Holzer, Martin Ebinger, Tim Flaadt, Rupert Handgretinger, Peter Lang, Jan Frederic Weller, Markus Mezger   +10 more
wiley   +1 more source