Results 21 to 30 of about 13,036,763 (283)

Rational Homotopy Perturbation Method [PDF]

Journal of Applied Mathematics, 2012
The solution methods of nonlinear differential equations are very important because most of the physical phenomena are modelled by using such kind of equations. Therefore, this work presents a rational version of homotopy perturbation method (RHPM) as a novel tool with high potential to find approximate solutions for nonlinear differential equations ...
openaire   +4 more sources

PERTURBATION THEORY FOR ELECTROMAGNETIC WAVE SCATTERING IN RANDOM LAYERED STRUCTURES [PDF]

, 2010
The problem of electromagnetic wave scattering in 3-D random layered structures, is analytical treated by relying on original results of the Boundary Perturbation Theory (BPT) and Volumetric-Perturbative Reciprocal Theory (VPRT), whose structured ...
Imperatore, Pasquale
core   +1 more source

Measurement error and statistical disclosure control [PDF]

, 2010
Statistical agencies release microdata to researchers after applying statistical disclosure control (SDC) methods. Noise addition is a perturbative SDC method which is carried out by adding independent random noise to a continuous variable or by ...
Shlomo, Natalie, Natalie Shlomo
core   +2 more sources

Robust localization methods for passivity enforcement of linear macromodels [PDF]

, 2013
In this paper we solve a non-smooth convex formulation for passivity enforcement of linear macromodels using robust localization based algorithms such as the ellipsoid and the cutting plane methods. Differently from existing perturbation based techniques,
Luca Daniel, Stefano Grivet-Talocia, Giuseppe C. Calafiore, Daniel, L., Alessandro Chinea, Mahmood, Z., Mahmood Z., Chinea, Alessandro, Zohaib Mahmood, Grivet-Talocia, S., Daniel L., GRIVET TALOCIA, STEFANO, Calafiore, Giuseppe Carlo   +12 more
core   +1 more source

Exact Separation of Purely Short-Period Effects and Mean Variations in the Main Problem of Artificial Satellite Theory

Aerospace
It is well known that mean elements obtained by canonical perturbation theory only agree partially with the average dynamics of the osculating orbit. While this fact does not necessarily compromise the accuracy of corresponding perturbation solutions ...
Martin Lara
doaj   +1 more source

Dissipative Capture of Planets into First-order Mean-motion Resonances

The Astrophysical Journal Letters, 2023
The emergence of orbital resonances among planets is a natural consequence of the early dynamical evolution of planetary systems. While it is well established that convergent migration is necessary for mean-motion commensurabilities to emerge, recent ...
Konstantin Batygin, Antoine C. Petit
doaj   +1 more source

Infinitely many solutions for nonlinear elliptic equations with degenerate coercivity

Electronic Journal of Qualitative Theory of Differential Equations
In this article, we consider the following quasilinear elliptic equation $$\begin{cases} -\operatorname{div}\dfrac{\nabla u}{(1+u)^{2\theta}} - \dfrac{\gamma\theta|\nabla u|^2}{(1+u)^{1+2\theta}} = u^p,\ x \in \mathbb{R}^N,\\[8pt] u > 0, \ \lim ...
Yongkuan Cheng, Yinchen Fan
doaj   +1 more source

Identifying Patterns of Hospitalizations Among Childhood Cancer Survivors: A Population‐Based Study

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Childhood cancer survivors (CCSs) experience more hospitalizations than the general population. We aimed to identify distinct hospitalization patterns among Queensland CCSs and the associated characteristics. Methods Cases (aged ≤14 years) diagnosed between 1995 and 2019 while residents of Queensland were identified through the ...
Hai Pham, Teyl Engstrom, Peter Baade, Natalie Bradford, Sarah Pont, Louise Marquart‐Wilson, Natasha Nassar, Jason D. Pole   +7 more
wiley   +1 more source

Comparative Evaluation of Hemodiafiltration, Hemoperfusion, and Standard Hemodialysis on Efficacy, Inflammatory Control, Dialysis Adequacy, and Safety in End‐Stage Renal Disease: A Prospective Observational Study

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Chronic micro‐inflammation in patients with end‐stage renal disease (ESRD) is a significant driver of cardiovascular complications and diminished quality of life. While standard hemodialysis (SHD) effectively manages small‐molecule clearance, its ability to remove medium‐to‐large uremic toxins—the primary catalysts of systemic ...
Hongwei Zuo, Weisi Dai, Jie Mao, Mei Ye, Xingshan Lu, Xiaocui Zhang   +5 more
wiley   +1 more source

Vector perturbation technique [PDF]

, 2010
La “vector perturbation technique” è una tecnica di codifica che permette di avvicinarsi alla capacità teorica del canale in un sistema MIMO. Questa tecnica va a operare sul vettore dati da trasmettere e si articola in quattro punti fondamentali: Channel
Vianello , Alessandro
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