Results 61 to 70 of about 283,081 (284)
Rational approximation vectors [PDF]
Acta Arithmetica, 1988 This paper treats a converse problem in the theory of simultaneous best approximation of real numbers by rational vectors with common denominator using the maximum-norm. The best approximation vector \(\mathfrak V_ k\) with \({\mathfrak V}_ k=N_ k{\bar \beta}-{\mathfrak a}_ k\) (\(N_ k\) a positive integer, \(\bar \beta\) a fixed \(n\)-tuple of real ...
Szekeres, George, T. Sós, Vera
openaire +2 more sources
MathematicsMultiple-input multiple-output (MIMO) linear time-invariant (LTI) systems exhibit enormous computational costs for high-dimensional problems. To address this problem, we propose a novel approach for reducing the dimensionality of MIMO systems. The method
Weixiang Xie, Jie Song
doaj +1 more source
On the Achievable Stabilization Delay Margin for Linear Plants with Time-Varying Delays
Mathematics, 2017 The paper contributes to stabilization problems of linear systems subject to time-varying delays. Drawing upon small gain criteria and robust analysis techniques, upper and lower bounds on the largest allowable time-varying delay are developed by using ...
Jing Zhu
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Rational Transfer Function Approximations to Transport Delay [PDF]
Modeling, Identification and Control, 1990 A method is presented for determining a rational transfer function approximation to transport delay which has the property that the error in the frequency response phase shift is zero at certain frequencies.
Jens G. Balchen
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Aging and Cancer, EarlyView.Natural products target the aging kidney in diabetic nephropathy by restoring the AMPK–SIRT1–Nrf2 axis, reducing oxidative stress, inflammation, fibrosis, and cellular senescence while enhancing mitochondrial biogenesis and antioxidant defenses.
Sherif Hamidu +8 more
wiley +1 more source
On a Lebesgue constant of interpolation rational process at the Chebyshev – Markov nodes
Журнал Белорусского государственного университета: Математика, информатика, 2019 In the present paper estimate of a Lebesgue constant of the interpolation rational Lagrange process on the segment [−1 ,1] at the Chebyshev – Markov cosine fractions nodes is considered.
Yauheni A. Rouba +2 more
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Calculation algorithm of rational estimations of recurrence periodical fourth order fraction
Karpatsʹkì Matematičnì Publìkacìï, 2014 Recurrence fourth order fractions are studied. Connection with algebraic fourth order equations is established. Calculation algorithms of rational contractions of such fractions are built.
R.A. Zatorsky, A.V. Semenchuk
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Filtering the Tau method with Frobenius-Pad\'e Approximants
, 2017 In this work, we use rational approximation to improve the accuracy of spectral solutions of differential equations. When working in the vicinity of solutions with singularities, spectral methods may fail their propagated spectral rate of convergence and
A., José M. +5 more
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Mutant NPM1 in Acute Myeloid Leukemia Initiation and Maintenance
Aging and Cancer, EarlyView.NPM1 mutations drive acute myeloid leukemia by acting as neomorphic transcriptional regulators that cooperate with Menin–MLL and XPO1 to sustain HOX/MEIS1 expression and block differentiation. Targeting these mutant‐specific transcriptional dependencies provides a rational therapeutic strategy for NPM1‐mutated AML.
Yanan Jiang +3 more
wiley +1 more source
Pad\'{e}-type approximations to the resolvent of fractional powers of operators
, 2019 We study a reliable pole selection for the rational approximation of the resolvent of fractional powers of operators in both the finite and infinite dimensional setting. The analysis exploits the representation in terms of hypergeometric functions of the
Aceto, Lidia, Novati, Paolo
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