no code implementations • 30 Mar 2020 • Hrushikesh N. Mhaskar
In this paper, we develop a very general theory of approximation by networks, which we have called eignets, to achieve local, stratified approximation.
no code implementations • 31 Jan 2020 • Charles K. Chui, Ningning Han, Hrushikesh N. Mhaskar
This paper is concerned with the inverse problem of recovering the unknown signal components, along with extraction of their instantaneous frequencies (IFs), governed by the adaptive harmonic model (AHM), from discrete (and possibly non-uniform) samples of the blind-source composite signal.
no code implementations • 26 Aug 2019 • Hrushikesh N. Mhaskar
In the context of manifold learning, our bounds provide estimates on the degree of approximation for an out-of-sample extension of the target function to the ambient space.
no code implementations • 6 Jun 2018 • Abhejit Rajagopal, Shivkumar Chandrasekaran, Hrushikesh N. Mhaskar
A new design methodology for neural networks that is guided by traditional algorithm design is presented.
no code implementations • 24 Sep 2017 • Hrushikesh N. Mhaskar
A zonal function (ZF) network on the $q$ dimensional sphere $\mathbb{S}^q$ is a network of the form $\mathbf{x}\mapsto \sum_{k=1}^n a_k\phi(\mathbf{x}\cdot\mathbf{x}_k)$ where $\phi :[-1, 1]\to\mathbf{R}$ is the activation function, $\mathbf{x}_k\in\mathbb{S}^q$ are the centers, and $a_k\in\mathbb{R}$.
no code implementations • 26 Jul 2017 • Charles K. Chui, Hrushikesh N. Mhaskar
Motivated by the interest of observing the growth of cancer cells among normal living cells and exploring how galaxies and stars are truly formed, the objective of this paper is to introduce a rigorous and effective method for counting point-masses, determining their spatial locations, and computing their attributes.
no code implementations • 26 Jul 2017 • Charles K. Chui, Hrushikesh N. Mhaskar
In this paper, motivated by diffraction of traveling light waves, a simple mathematical model is proposed, both for the multivariate super-resolution problem and the problem of blind-source separation of real-valued exponential sums.