Results 261 to 270 of about 65,693 (292)

Uniform persistence for population interaction models with time delay

Applicable Analysis, 1993
In this paper uniform persistence is establised for kolmogorov type Prey‐Predator and competion models with per capitals ent growth rates that are dependent on time‐lagged population densities.
Yulin Cao
exaly   +2 more sources

Uniform persistence in Kolmogorov models with convex growth functions

Nonlinear Analysis: Theory, Methods & Applications, 1998
The authors consider systems of differential equations of Kolmogorov type. Conditions for the uniform persistence of such systems with convex growth functions are studied. Conditions are derived for the extinction of at least one species when the growth functions are convex.
Debasis Mukherjee
exaly   +3 more sources

Uniform persistence and existence of strictly positive solutions in nonautonomous Lotka-Volterra competitive systems with delays

Computers and Mathematics With Applications, 1999
In this paper, we establish some new sufficient conditions for uniform persistence and existence of strictly positive solutions of the general nonautonomous N-species competitive Lotka-Volterra systems with delays. These results are different to those in
Lansun Chen
exaly   +2 more sources

Uniform persistence

, 2010
Hal Smith, Horst Thieme
openaire   +2 more sources

Chain transitivity and uniform persistence

Chaos, Solitons & Fractals, 2002
Some results of \textit{M. W. Hirsch}, \textit{H. L. Smith} and \textit{X.-Q. Zhao} [J. Dyn. Differ. Equations 13, 107--131 (2001; Zbl 1129.37306)] on the uniform persistence for continuous maps on metric spaces are improved. Other properties of these maps (attractivity, strong repellers) are also addressed along the lines of the cited paper of Hirsch ...
Zheng, Zuo-Huan, Huang, Tu-Sen
openaire   +2 more sources

Uniform Persistence in a Model for Bluetongue Dynamics

SIAM Journal on Mathematical Analysis, 2014
Uniform disease persistence is investigated for the time evolution of bluetongue, a viral disease in sheep and cattle that is spread by midges as vectors. The model is a system of several delay differential equations. As in many other infectious disease models, uniform disease persistence occurs if the basic disease reproduction number for the whole ...
Stephen A. Gourley, Gergely Röst, Horst R. Thieme   +2 more
openaire   +3 more sources

Designing Next Generation of Persistent Luminescence: Recent Advances in Uniform Persistent Luminescence Nanoparticles

Advanced Materials, 2022
AbstractPersistent luminescence is a unique optical process where long‐lasting afterglow persists after the cessation of excitation. Nanoscale persistent luminescent materials are getting increased research interest from various fields due to their unique optical property.
Kai Huang, Nhu Le, Justin S. Wang, Ling Huang, Le Zeng, Wei‐Chu Xu, Zhanjun Li, Yang Li, Gang Han   +8 more
openaire   +2 more sources

Relaxed persistency of excitation for uniform asymptotic stability

IEEE Transactions on Automatic Control, 2001
The authors of this paper propose a relaxed definition for persistence of excitation (uniform persistence of excitation), a property crucial for some stability analyses of parameter identification algorithms and adaptive control systems. The relaxed definition is used to establish uniform global asymptotic stability and uniform local exponential ...
Elena Panteley, Antonio Loría, Andrew R. Teel   +2 more
openaire   +1 more source

Persistence theorems and simultaneous uniformization

Proceedings of the Steklov Institute of Mathematics, 2006
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Uniform support for collections of objects in a persistent environment

[1989] Proceedings of the Twenty-Second Annual Hawaii International Conference on System Sciences. Volume II: Software Track, 2003
The LEIBNIZ programming language, developed as part of the MONADS project at the University of Newcastle, NSW, supports implementation-independent high-level constructs, based on sets and sequences, for manipulating collections of objects in such a way that the compiler can be guided to select a suitably efficient implementation mechanism.
J.L. Keedy, J. Rosenberg
openaire   +1 more source