Results 61 to 70 of about 1,014,881 (173)

On limit uniform distribution

open access: yesLietuvos Matematikos Rinkinys, 2008
In the first part of the present paper, we estimate the difference \Delta n(1) = sup-∞
Jonas Kazys Sunklodas
doaj   +1 more source

A New Sum Analogous to Gauss Sums and Its Fourth Power Mean

open access: yesThe Scientific World Journal, 2014
The main purpose of this paper is to use the analytic methods and the properties of Gauss sums to study the computational problem of one kind of new sum analogous to Gauss sums and give an interesting fourth power mean and a sharp upper bound estimate ...
Shaofeng Ru, Wenpeng Zhang
doaj   +1 more source

Using observational data to estimate an upper bound on the reduction in cancer mortality due to periodic screening

open access: yesBMC Medical Research Methodology, 2003
Background Because randomized cancer screening trials are very expensive, observational cancer screening studies can play an important role in the early phases of screening evaluation.
Kramer Barnett S   +3 more
doaj   +1 more source

Robust Stability Analysis for a Perturbed Single-Area Power System Model

open access: yesCybernetics and Information Technologies, 2015
This research work investigates the derivation of a fixed upper matrix bound for the solution of one class of parameter-dependent Continuous Algebraic Lyapunov Equations (CALE).
Savov Svetoslav, Popchev Ivan
doaj   +1 more source

Upper bounds for 21st-century surface air temperatures in the Western United States

open access: yesEnvironmental Research Letters
The last decade has seen a large number of severe heatwaves that were unprecedented in the observational record, highlighting challenges associated with observationally-based statistical quantification of the likelihood and magnitude of future extreme ...
Mark D Risser   +3 more
doaj   +1 more source

Asymptotic Behavior of Stochastic Reaction–Diffusion Equations

open access: yesMathematics
In this paper, we concentrate on the propagation dynamics of stochastic reaction–diffusion equations, including the existence of travelling wave solution and asymptotic wave speed. Based on the stochastic Feynman–Kac formula and comparison principle, the
Hao Wen   +3 more
doaj   +1 more source

Global and Blow-Up Solutions for a Class of Nonlinear Parabolic Problems under Robin Boundary Condition

open access: yesAbstract and Applied Analysis, 2014
We discuss the global and blow-up solutions of the following nonlinear parabolic problems with a gradient term under Robin boundary conditions: (b(u))t=∇·(h(t)k(x)a(u)∇u)+f(x,u,|∇u|2,t), in D×(0,T), (∂u/∂n)+γu=0, on ∂D×(0,T), u(x,0)=u0(x)>0, in D¯, where
Lingling Zhang, Hui Wang
doaj   +1 more source

Oszacowanie Krzywej Nośności Granicznej przy Jednoczesnym Skręcaniu z Rozciąganiem

open access: yesEngineering Transactions, 1963
Making use of the variational theorems of plasticity a general method is given for the determination of the upper and lower bound of the limit curve in the (Ms, N)– plane of external loads where Ms is the torque and N- the longitudinal force (tensile or ...
M. Wnuk
doaj  

Lower estimations of pure greedy algorithm with shrinkage

open access: yesJournal of Inequalities and Applications
Existing studies on the PGA have established its sharp convergence rate. Among its variants, the PGA with Shrinkage was shown in previous research to admit an upper bound, which may indeed be sharp. Motivated by this conjecture, we construct a worst-case
Fangjing Zhu, Yi Shen, Qifeng Zhang
doaj   +1 more source

Tighter Upper Bounds for Join Cardinality Estimates [PDF]

open access: yesProceedings of the 2018 International Conference on Management of Data, 2018
openaire   +1 more source

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