Results 31 to 40 of about 1,971,496 (273)

Exact and Numerical Elastic Analysis for the FGM Thick-Walled Cylindrical Pressure Vessels with Exponentially-Varying Properties

open access: yesArchives of Metallurgy and Materials, 2016
Assuming exponential-varying properties in the radial direction and based on the elasticity theory, an exact closed-form analytical solution is obtained to elastic analysis of FGM thick-walled cylindrical pressure vessels in the plane strain condition ...
Nejad M. Zamani   +3 more
doaj   +1 more source

On Tractable Exponential Sums [PDF]

open access: yes, 2010
We consider the problem of evaluating certain exponential sums. These sums take the form $\sum_{x_1,...,x_n \in Z_N} e^{f(x_1,...,x_n) {2 \pi i / N}} $, where each x_i is summed over a ring Z_N, and f(x_1,...,x_n) is a multivariate polynomial with ...
A. Bulatov   +10 more
core   +1 more source

Exponential independence

open access: yesDiscrete Mathematics, 2017
For a set $S$ of vertices of a graph $G$, a vertex $u$ in $V(G)\setminus S$, and a vertex $v$ in $S$, let ${\rm dist}_{(G,S)}(u,v)$ be the distance of $u$ and $v$ in the graph $G-(S\setminus \{ v\})$. Dankelmann et al. (Domination with exponential decay, Discrete Math.
Jäger, Simon, Rautenbach, Dieter
openaire   +3 more sources

DePIN zur Steigerung der Resilienz von EWF-Infrastrukturen

open access: yesTH Wildau Engineering and Natural Sciences Proceedings
Kritische Infrastrukturen in den Bereichen Energie, Wasser und Nahrungsmittel (EWF) benötigen angesichts zunehmender globaler Herausforderungen neue Resilienzkonzepte. Dieser Artikel untersucht, wie Decentralized Physical Infrastructure Networks (DePIN)
Bastian Halecker, Robert Henker
doaj   +1 more source

Applications of Multivariate Adaptive Regression Spline (MARS) for Modeling and Explaining Long Term Salinity and Total Dissolve Solid (TDS) river water Case study: Basins of khorasan jonobi [PDF]

open access: yesمخاطرات محیط طبیعی, 2013
Salinity (Ec) and Total Dissolve Solid (TDS) are considered as quality factor s of drinking water, agriculture and industry. First relation between Debite-Ec and Debite-TDS (rating function) of taken samples doing with the fitted regression models ...
majid janfeda, Hojat Rezai Pazhand
doaj   +1 more source

Is the fraction of people ever born who are currently alive rising or falling?

open access: yesDemographic Research, 2014
Background: Some journalists and demographers have asked: How many people have ever been born? What is the fraction F(t) of those ever born up to calendar year t who are alive at t? The conditions under which F(t) rises or falls appear never to have been
Joel E. Cohen
doaj   +1 more source

On exponentiating exponentiation

open access: yesJournal of Pure and Applied Algebra, 1981
It is well known that for any (small) category J, the category EnsJ of functors from J into the category of sets, is Cartesian closed (in fact it is an elementary topos, see for example Lawvere [l] or Tierney [4]). An exercise in MacLane [3, p. 961 suggests that a functor category KJ is Cartesian closed whenever K is Cartesian closed; however, it is ...
openaire   +2 more sources

Exponential stabilization without geometric control [PDF]

open access: yes, 2010
We present examples of exponential stabilization for the damped wave equation on a compact manifold in situations where the geometric control condition is not satisfied.
Schenck, Emmanuel
core   +1 more source

Study of flow past an exponentially accelerated isothermal vertical plate in the presence of chemical reaction [PDF]

open access: yesTheoretical and Applied Mechanics, 2010
Theoretical study of unsteady flow past an exponentially accelerated infinite isothermal vertical plate with variable mass diffusion has been presented in the presence of homogeneous chemical reaction of first order. The plate temperature is raised to
Muthucumaraswamy R., Valliammal V.
doaj   +1 more source

Exponential Cardassian Universe

open access: yes, 2005
The expectation of explaining cosmological observations without requiring new energy sources is forsooth worthy of investigation. In this letter, a new kind of Cardassian models, called exponential Cardassian models, for the late-time universe are ...
Amarzguioui   +42 more
core   +1 more source

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