搜索结果: 1-15 共查到“理学 Time scales”相关记录44条 . 查询时间(0.051 秒)
Collisional evolution and reddening of asteroid surfaces–I. The problem of conflicting time-scales and the role of size-dependent effects
meteorites meteors meteoroids–minor planets asteroids: general
2015/12/25
Space weathering is the generic term used for processes that modify the optical properties of surfaces of atmosphereless rocky bodies under exposure to the space environment. The general agreement abo...
Positive Solutions of Semipositone BVPs for Differential Systems on Time Scales
Positive solution Semipositone boundary value problem Differential systems Time scales
2011/10/12
The paper is concerned with the semipositone Sturm-Liouville-like boundary value problems of second-order differential systems on time scales with two parameters. Applying a fixed point theorem in con...
Fractional Derivatives and Integrals on Time Scales via the Inverse Generalized Laplace Transform
fractional derivatives and integrals time scales Laplace transform
2011/1/19
We introduce a fractional calculus on time scales using the theory of delta (or nabla)dynamic equations. The basic notions of fractional order integral and fractional order derivative on an arbitrary ...
A new periodicity concept for time scales
Periodic time scale periodic function shift operator
2011/1/20
By means of the shift operators we introduce a new periodicity concept on time scales. This new approach will enable researchers to investigate periodicity notion on a large class of time scales whose...
New integral inequality on time scales
Integral Inequalities Dynamic Equation and Inequalities
2010/9/25
In this paper we establish some new integral inequalities related to a certain inequality arising in the theory of dynamic equations on time scales.
Time scales in large systems of Brownian particles with stochastic synchronization
\Time scales large systems of Brownian particles stochastic synchronization
2011/1/21
We consider a system x(t) = (x1(t), . . . , xN(t)) consisting of N Brownian parti-cles with synchronizing interaction between them occurring at random time moments { n}1 n=1. Under assumption that the...
On the superimposition of heterogeneous traffic at large time scales
heterogeneous traffic scales
2010/11/24
Various empirical and theoretical studies indicate that cumulative network traffic is a Gaussian process. However, depending on whether the intensity at which sessions are initiated is large or small ...
Many Roads to Synchrony: Natural Time Scales and Their Algorithms
Chaotic Dynamics (nlin.CD) Formal Languages and Automata Theory (cs.FL) Information Theory (cs.IT) Dynamical Systems (math.DS)
2010/11/10
We survey the variety of ways in which one synchronizes to a stochastic process. We define associated length scales, providing characterization theorems and efficient algorithms for their calculation....
Separation of time-scales and model reduction for stochastic reaction networks
Separation time-scales stochastic reaction networks
2010/11/12
A stochastic model for a chemical reaction network is embedded in a one-parameter family of models with species numbers and rate constants scaled by powers of the parameter. A systematic approach is ...
Time scales of epidemic spread and risk perception on adaptive networks
epidemic spread risk perception adaptive networks
2010/11/16
Incorporating dynamic contact networks and delayed awareness into a contagion model with memory, we study the spreading patterns of infectious diseases in connected populations. It is found that the ...
Cosmic ray propagation time scales: lessons from radioactive nuclei and positron data
High Energy Astrophysical Phenomena (astro-ph.HE) High Energy Physics - Phenomenology (hep-ph)
2011/1/4
We take a fresh look at high energy radioactive nuclei data reported in the 90's and at the positron data recently reported by PAMELA. Our aim is to study the model independent implications of these d...
Triple positive solutions of four-point singular boundary value problems for p-Laplacian dynamic equations on time scales
Time scales Four-point singular boundary value problems
2010/9/15
Let T be a time scale. We study the existence of three positive solutions for the nonlinear four-point singular boundary value problem with p-Laplacian operator on time scales. Some new results are ob...
Nontrivial solutions for nonlinear higher order multi-point boundary value problem on time scales with all derivatives
Time scale Positive solutions Higher order multi-point boundary
2010/9/15
In this paper, we consider the existence of nontrivial solutions for nonlinear higher order multi-point boundary value problem on time scales with all derivatives. In the case where a nonlinearity may...
Mechanisms and time scales of glacial inception simulated with an Earth system model of intermediate complexity
Mechanisms Milankovitch forcing time scales
2009/12/3
We investigate glacial inception and glacial thresholds in the climate-cryosphere system utilising the Earth system model of intermediate complexity CLIMBER-2, which includes modules for atmosphere, t...
Biosphere-atmosphere exchange of CO2 in relation to climate:a cross-biome analysis across multiple time scales
Biosphere-atmosphere exchange CO2 cross-biome analysis multiple time scales
2010/1/21
The net ecosystem exchange of CO2 (NEE) varies at time scales from seconds to years and longer via the response of its components, gross ecosystem productivity (GEP) and ecosystem respiration (RE), to...