Results 31 to 40 of about 27,174,491 (303)

Detecting separate time scales in genetic expression data

open access: yesBMC Genomics, 2010
Background Biological processes occur on a vast range of time scales, and many of them occur concurrently. As a result, system-wide measurements of gene expression have the potential to capture many of these processes simultaneously.
Fink Thomas MA   +4 more
doaj   +1 more source

Using Virtual Reaction Scheme in the Multiple Time Scales System for Stochastic Modelling

open access: yesApplications of Modelling and Simulation, 2021
A virtual reaction scheme and the notion of quasi-independent is proposed in this paper to assist in model partitioning for the biochemical reactions with multiple time scales.
C. F. Khoo
doaj  

Multiple time scales of bank-full discharge in the Yellow River

open access: yesShui kexue jinzhan, 2012
Under the influence of climate changes,the hydrologic system has the characteristics of multiple time scales.The bank-full discharge,as a function of inflow conditions,also has the characteristics of multiple time scales.This phenomenon was studied based
ZHANG Yan-yan, ZHONG De-yu, WU Bao-sheng
doaj   +1 more source

Identifying Urban Residents’ Activity Space at Multiple Geographic Scales Using Mobile Phone Data

open access: yesISPRS International Journal of Geo-Information, 2020
Residents’ activity space reflects multiple aspects of human life related to space, time, and type of activity. How to measure the activity space at multiple geographic scales remains a problem to be solved.
Lunsheng Gong   +4 more
doaj   +1 more source

Study of the Dynamical Relationships between PM2.5 and PM10 in the Caribbean Area Using a Multiscale Framework

open access: yesAtmosphere, 2023
The Caribbean basin is a geographical area with a high prevalence of asthma due to mineral dust. As such, it is crucial to analyze the dynamic behavior of particulate pollutants in this region.
Thomas Plocoste   +2 more
doaj   +1 more source

Limitations of the Method of Multiple-Time-Scales

open access: yes, 2002
In the Method of Multiple-Time-Scales (MMTS), the introduction of independent time scales and the elimination of secular terms in the fast time variable, T0 = t, lead to the well-known solvability conditions. Starting from first order, free terms (solutions of the unperturbed equations) emerge in every order in the expansion of the approximate solution.
Kahn, Peter B., Zarmi, Yair
openaire   +2 more sources

Multi-Scale Correlation between Soil Loss and Natural Rainfall on Sloping Farmland Using the Hilbert–Huang Transform in Southwestern China

open access: yesAgronomy, 2023
The Hilbert–Huang transform (HHT) has been used as a powerful tool for analyzing nonlinear and nonstationary time series. Soil loss is controlled by complicated physical processes and thus fluctuates with nonlinearity and nonstationarity over time.
Xiaopeng Shi   +5 more
doaj   +1 more source

A Class of Shock Wave Solution to Singularly Perturbed Nonlinear Time-Delay Evolution Equations

open access: yesShock and Vibration, 2020
Nonlinear singularly perturbed problem for time-delay evolution equation with two parameters is studied. Using the variables of the multiple scales method, homogeneous equilibrium method, and approximation expansion method from the singularly perturbed ...
Yi-Hu Feng, Lei Hou
doaj   +1 more source

Testing the method of multiple scales and the averaging principle for model parameter estimation of quasiperiodic two time-scale models [PDF]

open access: yes, 2022
summary:Some dynamical systems are characterized by more than one time-scale, e.g. two well separated time-scales are typical for quasiperiodic systems.
Matonoha, Ctirad, Papáček, Štěpán
core   +1 more source

Metric Based Upscaling for Partial Differential Equations with a Continuum of Scales [PDF]

open access: yes, 2007
Numerical upscaling of problems with multiple scale structures have attracted increasing attention in recent years. In particular, problems with non-separable scales pose a great challenge to mathematical analysis and simulation.
Zhang, Lei
core   +1 more source

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