Results 41 to 50 of about 25,613,351 (218)

On Hardy-Hilbert-type inequalities with α-fractional derivatives

open access: yesAIMS Mathematics, 2023
In the current manuscript, new alpha delta dynamic Hardy-Hilbert inequalities on time scales are discussed. These inequalities combine and expand a number of continuous inequalities and their corresponding discrete analogues in the literature.
Marwa M. Ahmed   +4 more
doaj   +1 more source

A Survey of the time scale of capital asset pricing model (CAPM) by wavelet Transfarm [PDF]

open access: yesبررسی‌های حسابداری و حسابرسی, 2010
This essay deals with the possibility of better description of market return covariance and the efficiency of share company which are listed in Tehran stock exchange and seven world countries’ as well as capital asset pricing model by using wavelet ...
Gholam Reza Eslami   +3 more
doaj  

Towards an ediacaran time scale: Problems, protocols, and prospects

open access: yes, 2016
The Ediacaran Period follows the Cryogenian Period in the wake of a snowball Earth glaciation and precedes the Cambrian Period with its rising tide of animal radiation.
S. Xiao   +6 more
semanticscholar   +1 more source

Time scale bias in erosion rates of glaciated landscapes

open access: yesScience Advances, 2016
Averaging time scale bias may produce an apparent acceleration of measured erosion rates in glaciated landscapes. Deciphering erosion rates over geologic time is fundamental for understanding the interplay between climate, tectonic, and erosional ...
V. Ganti   +5 more
semanticscholar   +1 more source

Diversity of timescale promotes the maintenance of extortioners in a spatial prisoner’s dilemma game

open access: yesNew Journal of Physics, 2015
Recently, a class of interesting strategies, named extortion strategies, has attracted considerable attention since such extortion strategies can dominate any opponent in a repeated prisoner's dilemma game.
Zhihai Rong   +4 more
doaj   +1 more source

The asymptotic properties of the dynamic equation with a delayed argument [PDF]

open access: yesOpuscula Mathematica, 2006
In this paper, we present some asymptotic results related to the scalar dynamic equation with a delayed argument. Using the time scale calculus we generalize some results known in the differential and difference case to the more general dynamic case.
Jan Čermák, Miroslav Urbánek
doaj  

Time Scales and Characteristics of Stock Markets in Different Investment Horizons

open access: yesFrontiers in Physics, 2020
Investors adopt varied investment strategies depending on the time scales (τ) of short-term and long-term investment time horizons (ITH). The nature of the market is very different in various investment τ.
Ajit Mahata, Md. Nurujjaman
doaj   +1 more source

Ancient mitochondrial DNA provides high-resolution time scale of the peopling of the Americas

open access: yesScience Advances, 2016
Native American population history is reexamined using a large data set of pre-Columbian mitochondrial genomes. The exact timing, route, and process of the initial peopling of the Americas remains uncertain despite much research.
B. Llamas   +38 more
semanticscholar   +1 more source

Estimates on some power nonlinear Volterra-Fredholm type dynamic integral inequalities on time scales

open access: yesAdvances in Difference Equations, 2017
In this paper, some explicit bounds on solutions to a class of new power nonlinear Volterra-Fredholm type dynamic integral inequalities on time scales are established, which can be used as effective tools in the study of certain dynamic equations ...
Jiangfeng Wang, Fanwei Meng, Juan Gu
doaj   +1 more source

Increasing the Utilization of Transmission Lines Capacity by Quasi-Dynamic Thermal Ratings

open access: yesEnergies, 2019
The power grid is under pressure to maintain a reliable supply because of constrained budgets and environmental policies. In order to effectively make use of existing transmission lines, it is important to accurately evaluate the line capacity.
Fan Song   +4 more
doaj   +1 more source

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