User profiles for G. Rządkowski

Grzegorz Rządkowski

Warsaw University of Technology
Verified email at wz.pw.edu.pl
Cited by 309

[HTML][HTML] A high accurate scheme for numerical simulation of two-dimensional mass transfer processes in food engineering

Y Yang, G Rządkowski, A Pasban, E Tohidi… - Alexandria Engineering …, 2021 - Elsevier
This paper contributes to develop a highly accurate numerical method for solving two-dimensional
mass transfer equations during convective air drying of apple slices. The numerical …

[PDF][PDF] The gompertz function and its applications in management

G Rządkowski, I Głażewska, K Sawińska - Foundations of …, 2015 - sciendo.com
In the present paper, we investigate the Gompertz function, which is commonly used, mostly
as diffusion model, in economics and management. Our approach is based on indicating in …

[HTML][HTML] A generalized logistic function and its applications

G Rządkowski, L Sobczak - Foundations of Management, 2020 - sciendo.com
In the present article, we deal with a generalization of the logistic function. Starting from the
Riccati differential equation with constant coefficients, we find its analytical form and describe …

[PDF][PDF] New formulas for immunizing durations

G Rządkowski, LS Zaremba - Journal of Derivatives, 2000 - researchgate.net
The paper concerns immunization in the continuous context when a liability consists of a
single outflow at a known future date. It is assumed in Theorem 1 that interest rates h (0, t) shift …

[HTML][HTML] Logistic wavelets and their application to model the spread of COVID-19 pandemic

G Rza̧dkowski, G Figlia - Applied Sciences, 2021 - mdpi.com
In the present paper, we model the cumulative number of persons, reported to be infected with
COVID-19 virus, by a sum of several logistic functions (the so-called multilogistic function). …

Channel selection in home 802.11 standard networks

…, A Masiukiewicz, G Rządkowski - The 10th international …, 2014 - ieeexplore.ieee.org
… 16,7 Four different values of frequency range are taken into account: 20 MHz (which is
formal channel width in 802.11b/g/n standards), 22 MHz (the spectral filter attenuation reaches -…

A generalization of the Euler-Maclaurin summation formula: an application to numerical computation of the Fermi-Dirac integrals

G Rzadkowski, S Łepkowski - Journal of Scientific Computing, 2008 - Springer
… only one evaluation of the function g(x) = 1/(1 + exp(x − η)) is needed; the values of derivatives
g (x) and g (x) in (26) are expressed by polynomials with integer coefficient of g(x). The …

Derivatives and Eulerian numbers

G Rzadkowski - The American Mathematical Monthly, 2008 - Taylor & Francis
1. INTRODUCTION. The aim of the present note is to give a closed form formula for the nth
derivative of a function which satisfies Riccati’s differential equation with constant coefficients. …

On some connections between the Gompertz function and special numbers

G Rzadkowski, W Rzadkowski, P Wójcicki - Journal of Nonlinear …, 2015 - Springer
In the present paper we show that the Gompertz function, the Fisher—Tippett and the
Gumbel probability distributions are related to both Stirling numbers of the second kind and …

[HTML][HTML] Some applications of the generalized Eulerian numbers

G Rzadkowski, M Urlińska - Journal of Combinatorial Theory, Series A, 2019 - Elsevier
In the present paper we generalize the Eulerian numbers (also of the second and third orders).
The generalization is related to an autonomous first-order differential equation, solutions …