Results 51 to 60 of about 120,633 (286)

Extrapolated Implicit–Explicit Runge–Kutta Methods

open access: yesMathematical Modelling and Analysis, 2014
We investigate a new class of implicit–explicit singly diagonally implicit Runge–Kutta methods for ordinary differential equations with both non-stiff and stiff components. The approach is based on extrapolation of the stage values at the current step by
Angelamaria Cardone   +3 more
doaj   +1 more source

Very High Order $\PNM$ Schemes on Unstructured Meshes for the Resistive Relativistic MHD Equations

open access: yes, 2009
In this paper we propose the first better than second order accurate method in space and time for the numerical solution of the resistive relativistic magnetohydrodynamics (RRMHD) equations on unstructured meshes in multiple space dimensions.
Dumbser, Michael, Zanotti, Olindo
core   +1 more source

Efficacy and Safety Analysis of Roxarestat in Regulating Renal Anemia in Patients on Maintenance Hemodialysis

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Objective To compare the efficacy and safety of roxarestat versus recombinant human erythropoietin (rhEPO) in the management of renal anemia in patients undergoing maintenance hemodialysis. Methods This was a prospective, open‐label, randomized controlled trial.
Lingling Chen, Junjie Zhu, Qiaonan Ge
wiley   +1 more source

A HYBRID METHOD FOR STIFF REACTION-DIFFUSION EQUATIONS. [PDF]

open access: yes, 2019
The second-order implicit integration factor method (IIF2) is effective at solving stiff reaction-diffusion equations owing to its nice stability condition.
Chen, Weitao, Nie, Qing, Qiu, Yuchi
core  

Exact anisotropic brane cosmologies [PDF]

open access: yes, 2001
We present exact solutions of the gravitational field equations in the generalized Randall-Sundrum model for an anisotropic brane with Bianchi type I and V geometry, with perfect fluid and scalar fields as matter sources.
A. Campos   +28 more
core   +3 more sources

Dietary Protein Intake and Peritoneal Protein Losses in Peritoneal Dialysis Patients

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Peritoneal dialysis (PD) patients lose protein in their waste dialysate, potentially increasing their risk for malnutrition. We wished to determine whether there was any association between losses and dietary protein intake (DPI). Methods DPI was assessed from 24‐h dietary recall using Nutrics software.
Haalah Shaaker, Andrew Davenport
wiley   +1 more source

Superposition Method with the Principle of Multiple Shooting for Solving Stiff Linear Initial Value Problems [PDF]

open access: yesAl-Rafidain Journal of Computer Sciences and Mathematics, 2005
The main objective of this paper is the development of a new technique for solving stiff Linear Initial Value Problems (IVPs) in Ordinary Differential Equations (ODEs), The new Technique consists of combining the linear superposition principle with the ...
Basheer Khalaf, Suhaib Al-Tamr
doaj   +1 more source

Vortex in a relativistic perfect isentropic fluid and Nambu Goto dynamics

open access: yes, 1999
By a weak deformation of the cylindrical symmetry of the potential vortex in a relativistic perfect isentropic fluid, we study the possible dynamics of the central line of this vortex.
B. Boisseau   +9 more
core   +1 more source

Effects of the Fluid Replacement Method During Online Hemodiafiltration on the Solute Removal Performance and Biocompatibility Using the Asymmetric Cellulose Triacetate Membrane

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Pre‐dilution online hemodiafiltration (Pre‐HDF) is predominantly used in Japan, whereas post‐dilution online HDF (Post‐HDF) is more common in Europe. An asymmetric cellulose triacetate (ATA) membrane may improve biocompatibility.
Kenji Sakurai   +4 more
wiley   +1 more source

Extrapolation at stiff differential equations

open access: yesNumerische Mathematik, 1988
Asymptotic expansions for the global error for extrapolation methods using the implicit Euler method, the linearly implicit Euler method and the linearly implicit midpoint rule for stiff initial value problems in ordinary differential equations are derived. Practical implications of these results for error estimation and step-size control are indicated.
Hairer, E., Lubich, C.
openaire   +2 more sources

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