Results 21 to 30 of about 233,327 (304)

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   +3 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
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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

Principal component analysis and perturbation theory–based robust damage detection of multifunctional aircraft structure [PDF]

, 2013
A fundamental problem in structural damage detection is to define an efficient feature to calculate a damage index. Furthermore, due to perturbations from various sources, we also need to define a rigorous threshold whose overtaking indicates the ...
HAJRYA, Rafik, MECHBAL, Nazih
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

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
core  

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

Therapeutic 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

Antenna array calibration methods based on simultaneous perturbation

IET Microwaves, Antennas & Propagation, 2022
Antenna arrays have gained significant interest in millimetre‐wave communication systems as an enabling technology to achieve higher capacity and mitigate the high propagation loss.
Huijuan Xing, Yongwei Zhang, Yanwei Fu, Xianyang Lv, Zhihuo Xu, Jiajia Shi, Quan Shi, Murat Temiz, Ahmed El‐Makadema   +8 more
doaj   +1 more source

Spatiotemporal and quantitative analyses of phosphoinositides – fluorescent probe—and mass spectrometry‐based approaches

FEBS Letters, EarlyView.
Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho, Shin Morioka, Junko Sasaki, Takehiko Sasaki   +3 more
wiley   +1 more source

Perturbation-based nonperturbative method

Annals of Physics
This paper presents a nonperturbative method for solving eigenproblems. This method applies to almost all potentials and provides nonperturbative approximations for any energy level. The method converts an eigenproblem into a perturbation problem, obtains perturbation solutions through standard perturbation theory, and then analytically continues the ...
Chang Liu, Wen-Du Li, Wu-Sheng Dai
openaire   +2 more sources