Results 141 to 150 of about 618,259 (179)

A PRIORI ESTIMATES

2003
Abstract A priori estimates play a decisive role in the analysis of any nonlinear problem. They determine the class of functions, where the solutions are looked for. A priori estimates resulting from the basic physical principles — conservation (or balance) of mass, momentum, and energy — are discussed.
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A Priori Wire Length Estimation

2001
This chapter presents an overview of wire length estimation models. Donath’s pioneering hierarchical placement model [Don79] will be described in the second section and its resulting average wire length estimations will be evaluated.
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A priori estimates for harmonic mappings

Analysis, 2007
SummaryWe give a new proof of a well known regularity result for harmonic mappings between Riemannian manifolds due to Giaquinta and Hildebrandt [3]. The proof uses a modification of a method due to L. Caffarelli [2] to show interior and boundary Hölder-continuity of harmonic mappings, whose images lie in a regular ball.
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Some a priori estimates in mechanics

Russian Physics Journal, 1992
The scope for quantitative a priori estimators is considered and some of the input data are of probabilistic type subject to given constraints. Corresponding estimates are given for the stability of a rod with initial imperfections on pulsed loading, boundary-value problems for a planar potential, and topics in planar elasticity; these relate the ...
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A Priori Estimates for Prescribing Scalar Curvature Equations

The Annals of Mathematics, 1997
This is a remarkable paper in the study of scalar curvature equations. There are two important contributions in this paper. One is that they use the Kelvin transform and the maximum principle to derive estimates on solutions in the region where the prescribed scalar curvature is negative.
Chen, Wenxiong, Li, Congming
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A priori weighting for parameter estimation

Journal of Inverse and Ill-posed Problems, 2008
The author considers parameter estimation as an element of inverse modelling in which measurements (data) are used to infer the parameters in a mathematical model. He assumes that parameter estimation can be viewed as an optimization problem in which the objective function representing the data misfit is minimized in a given norm.
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Existence of EMS Solutions and a Priori Estimates

SIAM Journal on Matrix Analysis and Applications, 1995
The author establishes the solvability of the nonlinear EMS (estimate, maximize, smooth) equations in the nonnegative quadrant by use of the Brouwer fixed point theorem and a priori estimates from the Perron- Frobenius theory. Existence of solutions and an a priori estimate are also proven for a generalization of the EMS equations.
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Estimation of functionals in an a priori density

Journal of Soviet Mathematics, 1988
We are concerned with the estimation of linear and quadratic functionals of the form \[ (1)\quad \Phi (g)=\int_{\Theta}\phi (\theta)g(\theta)\mu (d\theta),\quad and\quad (2)\quad \Omega (g)=\int_{\Theta}\omega (\theta)g^ 2(\theta)\mu (d\theta) \] in an unknown a priori density. One of the methods for obtaining the desired estimates is to estimate first
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A priori sharp estimates for minimizers

1993
The problem discussed is a classical problem of calculus of variations: \[ \begin{cases} J(w)= \int_G \{a(x, Dw)+ b(x, w)\}dx\to \min\\ \text{with } w(x)= g(x)\text{ on }\partial G,\end{cases}\tag{1.1} \] (\(Dw\) is the gradient). The authors consider the class of such problems where rates of growth of the functions \(a\) and \(b\) are given and the ...
CIANCHI, ANDREA, R. SCHIANCHI
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Multilateration Using A Priori Position Estimates

IEEE Transactions on Radar Systems, 2023
Eric Widdison, David G. Long
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