Results 21 to 30 of about 6,930 (179)
Brazilian Journal of Geology, 2020 Alta Floresta Gold Province occurs in the center-south portion of the Amazon Craton. Trairão gold deposit, which is located in the Alta Floresta Gold Province, is hosted by 1878 to 1854 Ma arc-related granites. Two important Au deposits take place in the
Mara Luiza Barros Pita Rocha +7 more
doaj +1 more source
Limit cycles of perturbed global isochronous center
3C Tecnología_Glosas de innovación aplicadas a la pyme, 2022 We apply the averaging method of first order to study the maximum number of limit cycles of the ordinary differential systems of the form ¨x + x = ε (f1(x, y)y + f2 (x, y)) , ¨y + y = ε (g1(x, y)x + g2 (x, y)) , where f1(x, y) and g1(x, y) are real cubic polynomials; f2(x, y) and g2(x, y) are real quadratic polynomials.
Zouhair Diab +3 more
openaire +1 more source
On Chouikha's isochronicity criterion [PDF]
, 2012 Recently A.R.Chouikha gave a new characterization of isochronicity of center at the origin for the equation $x"+g(x)=0$, where $g$ is a real smooth function defined in some neighborhood of $0 \in \R$. We describe another proof of his characterization and
Strelcyn, Jean-Marie
core +2 more sources
Limit Cycles Coming from Some Uniform Isochronous Centers [PDF]
Advanced Nonlinear Studies, 2016 Abstract This article is about the weak 16th Hilbert problem, i.e. we analyze how many limit cycles can bifurcate from the periodic orbits of a given polynomial differential center when it is perturbed inside a class of polynomial differential systems. More precisely, we consider the uniform isochronous centers
Haihua Liang +2 more
openaire +5 more sources
Center and isochronous center at infinity for differential systems
Bulletin des Sciences Mathématiques, 2004 Here, center and isochronous center conditions are investigated for differential systems at infinity. The authors give a suitable transformation by which infinity can be transferred into the origin. The properties of infinity are studied using well-known methods which are used for the origin.
Liu, Yirong, Huang, Wentao
openaire +1 more source
P3b reflects periodicity in linguistic sequences [PDF]
, 2012 Temporal predictability is thought to affect stimulus processing by facilitating the allocation of attentional resources. Recent studies have shown that periodicity of a tonal sequence results in a decreased peak latency and a larger amplitude of the P3b
Abel, Cornelius Benjamin +4 more
core +3 more sources
Relativistic Hydrodynamics for Heavy--Ion Collisions: Freeze--Out and Particle Spectra [PDF]
, 1996 We investigate freeze--out in hydrodynamic models for relativistic heavy--ion collisions. In particular, instantaneous freeze--out across a hypersurface of constant temperature (``isothermal'' freeze--out) is compared with that across a hypersurface at ...
Achenbach +38 more
core +2 more sources
An Artificial Molecular Pump Powered by Light
Angewandte Chemie, EarlyView.A minimal rotaxane‐based supramolecular system functions as a light‐powered molecular pump, capturing macrocycles from solution and concentrating them within an intramolecular compartment. Repeated azobenzene photoisomerization modulates the binding and kinetic barriers of threading and shuttling, generating a photon‐driven energy ratchet that sustains
Federico Nicoli +7 more
wiley +2 more sources
Regular and Singular Pulse and Front Solutions and Possible Isochronous Behavior in the Short-Pulse Equation: Phase-Plane, Multi-Infinite Series and Variational Approaches [PDF]
, 2014 In this paper we employ three recent analytical approaches to investigate the possible classes of traveling wave solutions of some members of a family of so-called short-pulse equations (SPE).
Choudhury, A. Ghose +4 more
core +1 more source
Self-Stimulated Undulator Radiation and its Possible Applications [PDF]
, 2010 We investigated the phenomena of self-stimulation of incoherent emission from an undulator installed in the linear accelerator or quasi-isochronous storage ring.
Bessonov, E. G. +4 more
core +2 more sources