Results 71 to 80 of about 2,970,127 (311)

Stability and Hopf-bifurcation analysis of an unidirectionally coupled system

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2011
In this paper, the stability and existence of periodic solutions for an unidirectionally coupled nonlinear system with delays are investigated by combining the linear stability theory and the embedding technique of asymptotically autonomous semiflows ...
Gang Zhu, Junjie Wei
doaj   +1 more source

Remarks on some new models of interacting quantum fields with indefinite metric

open access: yes, 1997
We study quantum field models in indefinite metric. We introduce the modified Wightman axioms of Morchio and Strocchi as a general framework of indefinite metric quantum field theory (QFT) and present concrete interacting relativistic models obtained by ...
Albeverio   +16 more
core   +2 more sources

Clinical Characteristics and Prognostic Risk Factors for Pediatric B‐Cell Lymphoblastic Lymphoma: A Multicenter Retrospective Cohort Study for China Net Childhood Lymphoma

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background B‐cell lymphoblastic lymphoma (B‐LBL) represents a rare variety of non‐Hodgkin lymphoma, with limited research on its biology, progression, and management. Methods A retrospective analysis was performed on the clinical characteristics of 256 patients aged ≤18 years who received treatment under the China Net Childhood Lymphoma (CNCL)‐
Zhijuan Liu   +20 more
wiley   +1 more source

A Nonlinear vibration analysis of forced response for a bladed-disk with dry friction dampers

open access: yesJournal of Low Frequency Noise, Vibration and Active Control, 2019
This paper focuses on the steady vibration characteristics of the bladed-disk subjected to the dry friction damping under periodic excitation. The multi-harmonic method and continuation procedure are combined to trace the solution of the nonlinear forced
Tianyuan Liu, Di Zhang, Yonghui Xie
doaj   +1 more source

A Probabilistic Angle on One Loop Scalar Integrals

open access: yes, 2017
Recasting the $N$-point one loop scalar integral as a probabilistic problem, allows the derivation of integral recurrence relations as well as exact analytical expressions in the most common cases.
Benhaddou, Kamel
core   +1 more source

Predicting the Future Burden of Renal Replacement Therapy in Türkiye Using National Registry Data and Comparative Modeling Approaches

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Chronic kidney disease is a growing public health problem worldwide, and the number of patients requiring renal replacement therapy is steadily increasing. Türkiye has experienced a similar rise in both the incidence and prevalence of renal replacement therapy over the past decades; however, national‐level projections of future ...
Arzu Akgül   +2 more
wiley   +1 more source

The Analytic Continuation of the Lippmann-Schwinger Eigenfunctions, and Antiunitary Symmetries

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2009
We review the way to analytically continue the Lippmann-Schwinger bras and kets into the complex plane. We will see that a naive analytic continuation leads to nonsensical results in resonance theory, and we will explain how the non-obvious but correct ...
Rafael de la Madrid
doaj   +1 more source

Integral representations for harmonic and biharmonic functions in the unit ball (in Russian) [PDF]

open access: yesМатематичні Студії, 2013
In the paper an analytical solution of the analytic continuation problem in the unit N-dimensional ball by its values on the inner sphere is found. A generalization of the classical Poisson formula is obtained.
O. E. Yaremko
doaj  

General Mapping between Complex Spatial and Temporal Frequencies by Analytical Continuation

open access: yes, 2020
This paper introduces a general technique for inter-mapping the complex spatial frequency (or propagation constant) $\gamma=\alpha+j\beta$ and the temporal frequency $\omega = \omega_\text{r}+j\omega_\text{i}$ of an arbitrary electromagnetic structure ...
Caloz, Christophe, Dehmollaian, Mojtaba
core   +2 more sources

Regular S-Brane Backgrounds [PDF]

open access: yes, 2004
We construct time-dependent S-brane solutions to the supergravity field equations in various dimensions which (unlike most such geometries) do not contain curvature singularities.
A. Buchel   +45 more
core   +3 more sources

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