نتایج جستجو برای: chebyshev center

تعداد نتایج: 287368  

2014
Dominik Vollherbst Stefan Fritz Sascha Zelzer Miguel F. Wachter Maya B. Wolf Ulrike Stampfl Daniel Gnutzmann Nadine Bellemann Anne Schmitz Jürgen Knapp Philippe L. Pereira Hans-Ulrich Kauczor Jens Werner Boris A. Radeleff Christof M. Sommer

BACKGROUND Size and shape of the treatment zone after Irreversible electroporation (IRE) can be difficult to depict due to the use of multiple applicators with complex spatial configuration. Exact geometrical definition of the treatment zone, however, is mandatory for acute treatment control since incomplete tumor coverage results in limited oncological outcome. In this study, the "Chebyshev Ce...

Journal: :bulletin of the iranian mathematical society 2011
a. niknam s. shadkam

In this paper, we consider Nearest points" and Farthestpoints" in normed linear spaces. For normed space (X; ∥:∥), the set W subset X,we dene Pg; Fg;Rg where g 2 W. We obtion results about on Pg; Fg;Rg. Wend new results on Chebyshev centers in normed spaces. In nally we deneremotal center in normed spaces.

Journal: :SIAM J. Matrix Analysis Applications 2007
Amir Beck Yonina C. Eldar

We consider the problem of estimating a vector z in the regression model b = Az+w, where w is an unknown but bounded noise. As in many regularization schemes, we assume that an upper bound on the norm of z is available. To estimate z we propose a relaxation of the Chebyshev center, which is the vector that minimizes the worst-case estimation error over all feasible vectors z. Relying on recent ...

Journal: :Journal of Mathematical Analysis and Applications 2016

1993
Thorsten Werther

It is a well known fact that the generalized Vandermonde determinant can be expressed as the product of the standard Vandermonde determinant and a polynomial with nonnegative integer coefficients. In this paper we generalize this result to Vandermonde determinants over the Chebyshev basis. We apply this result to prove that the number of real roots in [1;1] of a real polynomial is bounded by th...

In this paper, a modified auto zeroed integrator is used to design and simulate a low-voltage high-Q switched capacitor pseudo 2-path filter.  The filter is a sixth–order Chebyshev band-pass filter operating at sampling frequency of 1MHz and center frequency of 250 kHz with a quality factor of 50. The proposed filter has both low-voltage and high speed properties of the auto zeroed integrators ...

Journal: :Optimization Letters 2023

Abstract As a heuristic for obtaining feasible points of mixed integer linear problems, the feasibility pump (FP) generates two sequences points: one solutions relaxed problem; and another obtained by rounding solutions. In previous work, present authors proposed variant FP, named analytic center which obtains in segment between solution polyhedron problem. This work introduces new FP that repl...

Journal: :Quaestiones Mathematicae 2021

In this paper, we prove that if E is an uniquely remotal subset of a real normed linear space such has Chebyshev center c ∈ and the farthest point map F : → restricted to [c, (c)] p...

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