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Mathematical tests about the existence and applications of PPS-wavelets in function approximation problems
(Spie - Int Soc Optical Engineering, 1998-01-01)
Neural networks and wavelet transform have been recently seen as attractive tools for developing eficient solutions for many real world problems in function approximation. Function approximation is a very important task ...
Radial basis function networks with quantized parameters
(2008-09-30)
A RBFN implemented with quantized parameters is proposed and the relative or limited approximation property is presented. Simulation results for sinusoidal function approximation with various quantization levels are shown. ...
Radial basis function networks with quantized parameters
(2008-09-30)
A RBFN implemented with quantized parameters is proposed and the relative or limited approximation property is presented. Simulation results for sinusoidal function approximation with various quantization levels are shown. ...
Inequalities in Lp−1 for the extended Lp best approximation operator
(Elsevier Inc, 2012-09)
The best polynomial approximation operator was recently extended by one of the authors from Lp to Lp−1. In this paper, we study weak and strong inequalities for maximal operators related with the extended best polynomial ...
Error function approximations of interest in electrochemistry.
(Editora Unesp, 1996-01-01)
The error function is present in several equations describing eletrode processes. But, only approximations of this function are used. In this work, these and other approximations are studied and evaluated according to precision.
Mathematical tests about the existence and applications of PPS-wavelets in function approximation problems
(Spie - Int Soc Optical Engineering, 2014)
Characterizations of convex approximate subdifferential calculus in banach spaces
(Amer Mathematical Soc, 2016)
We establish subdifferential calculus rules for the sum of convex functions defined on normed spaces. This is achieved by means of a condition relying on the continuity behaviour of the inf-convolution of their corresponding ...
A counterexample for H ∞ approximable functions
(American Mathematical Society, 2000-12)
Let D be the unit disk. We show that for some relatively closed set F ⊂ D there is a function f that can be uniformly approximated on F by functions of H∞, but such that f cannot be written as f = h + g, with h ∈ H∞ and g ...
Approximate controllability of second-order distributed implicit functional systems
(PERGAMON-ELSEVIER SCIENCE LTD, 2009)
In this paper we study the approximate controllability of control systems with states and controls in Hilbert spaces, and described by a second-order semilinear abstract functional differential equation with infinite delay. ...