Results 1 to 10 of about 22,430,852 (308)

Investigation of the Hydrological Response to Meteorological Drought in Kashkan Sub-Catchments [PDF]

open access: yesمحیط زیست و مهندسی آب, 2022
The meteorological drought phenomenon and its relationship to the hydrological response of the catchments are of particular importance in the development of programs related to the comprehensive water management of the basin.
Rahim Kazemi   +2 more
doaj   +1 more source

Internally Positive Representation to Stability of Delayed Timescale-Type Differential- Difference Equation

open access: yesIEEE Access, 2021
This paper considers exponential stability for a class of timescale-type differential-difference equation with bounded time-varying delay. Based on time scale theory, internally positive representation technique, as well as the existing exponential ...
Qiang Xiao, Yin Yang, Tingwen Huang
doaj   +1 more source

Time Scale for Scour Beneath Pipelines Due to Long-Crested and Short-Crested Nonlinear Random Waves Plus Current

open access: yesJournal of Marine Science and Engineering, 2021
This article derives the time scale of pipeline scour caused by 2D (long-crested) and 3D (short-crested) nonlinear irregular waves and current for wave-dominant flow.
Dag Myrhaug, Muk Chen Ong
doaj   +1 more source

The Convolution on Time Scales [PDF]

open access: yesAbstract and Applied Analysis, 2007
The main theme in this paper is an initial value problem containing a dynamic version of the transport equation. Via this problem, the delay (or shift) of a function defined on a time scale is introduced, and the delay in turn is used to introduce the convolution of two functions defined on the time scale.
Bohner, Martin, Guseinov, Gusein Sh.
openaire   +4 more sources

Oscillation of noncanonical fourth-order dynamic equations

open access: yesApplied Mathematics in Science and Engineering, 2023
We present two sufficient conditions for the oscillatory behaviour of a class of noncanonical fourth-order dynamic equations on arbitrary time scales. An illustrative example is included to show that new criteria improve related results reported in the ...
Qingmin Liu   +3 more
doaj   +1 more source

A Multi-Scale Time Method for the State of Charge and Parameter Estimation of Lithium-Ion Batteries Using MIUKF-EKF

open access: yesFrontiers in Energy Research, 2022
Accurate state estimation is essential for the safe and reliable operation of lithium-ion batteries. However, the accuracy of the battery state estimation depends on the accuracy of the battery parameters.
Shiyu Ji, Yi Sun, Zexing Chen, Wu Liao
doaj   +1 more source

Santa Ana Winds: Fractal-Based Analysis in a Semi-Arid Zone of Northern Mexico

open access: yesAtmosphere, 2021
A fractal analysis based on the time series of precipitation, temperature, pressure, relative humidity, and wind speed was performed for 16 weather stations located in the hydrographic basin of the Guadalupe River in Baja California, Mexico.
Yeraldin Serpa-Usta   +8 more
doaj   +1 more source

Canonical time-frequency, time-scale, and frequency-scale representations of time-varying channels [PDF]

open access: yesCommunications in Information and Systems, 2005
Mobile communication channels are often modeled as linear time-varying filters or, equivalently, as time-frequency integral operators with finite support in time and frequency. Such a characterization inherently assumes the signals are narrowband and may not be appropriate for wideband signals.
Rickard, Scott T.   +3 more
openaire   +4 more sources

Qi Type Diamond-Alpha Integral Inequalities

open access: yesMathematics, 2021
In this paper, we establish sufficient conditions for Qi type diamond-alpha integral inequalities and its generalized form on time scales.
Zhong-Xuan Mao   +5 more
doaj   +1 more source

Time Scales in Evolutionary Dynamics [PDF]

open access: yesPhysical Review Letters, 2006
Final version with minor changes, accepted for publication in Physical Review ...
Pérez Roca, Carlos   +2 more
openaire   +4 more sources

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