In this article, we study some new characterizations of primitive recursive functions based on restricted forms of primitive recursion, improving the pioneering work of R. M. Robinson and M. D.

Abstract: A variable digital filter (VDF) is a highly flexible reconfigurable signal processing system that is able to change its frequency-domain characteristic (frequency response) during filtering ...

Abstract: Linear regression with the recursive least-squares algorithm is widely used for parameter estimation. However, in a number of cases, linear regression is not sufficient to accurately ...