Results 1 to 10 of about 11,323,677 (336)
Irreversibility time scale [PDF]
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2006 Entropy creation rate is introduced for a system interacting with thermostats (i.e., for a system subject to internal conservative forces interacting with “external” thermostats via conservative forces) and a fluctuation theorem for it is proved. As an application, a time scale is introduced, to be interpreted as the time over which irreversibility ...
Evans D., G. Gallavotti, Gallavotti G.
openaire +6 more sources
Canonical time-frequency, time-scale, and frequency-scale representations of time-varying channels [PDF]
Communications 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 +5 more sources
Time‐scale transformations of discrete time processes [PDF]
Journal of Time Series Analysis, 2003 Abstract. This paper investigates the effects of temporal aggregation when the aggregation frequency is variable and possibly stochastic. The results that we report include, as a particular case, the well‐known results on fixed‐interval aggregation, such as when monthly data are aggregated into quarters.
Oscar Jorda, Massimiliano Marcellino
openaire +6 more sources
Investigation of the Hydrological Response to Meteorological Drought in Kashkan Sub-Catchments [PDF]
محیط 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
IEEE 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
Journal 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
Some new dynamic Steffensen-type inequalities on a general time scale measure space
AIMS Mathematics, 2022 Our work is based on the multiple inequalities illustrated by Josip Pečarić in 2013, 1982 and Srivastava in 2017. With the help of a positive σ-finite measure, we generalize a number of those inequalities to a general time scale measure space.
Ahmed A. El-Deeb +3 more
doaj +1 more source
Oscillation of noncanonical fourth-order dynamic equations
Applied 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
Frontiers 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
Atmosphere, 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