Repozytorium ZUT
Repozytorium ZUT jest cyfrową usługą, która gromadzi, przechowuje i udostępnia materiały cyfrowe utworzone przez społeczność akademicką Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie
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Najnowsze publikacje
Influence of Potassium-Based Activation on Adsorptive Properties of Carbon SpheresModified with Iron(III) Citrate
(MDPI, 2023-07-25) Pełech, Iwona; Sibera, Daniel; Staciwa, Piotr; Sobczuk, Konrad S.; Narkiewicz, Urszula; West Pomeranian University of Technology in Szczecin, Department of Inorganic Chemical Technology and Environmental Engineering, 70-322 Szczecin, ul Pułaskiego 10, Poland; Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydział Technologii i Inżynierii Chemicznej. Katedra Technologii Chemicznej Nieorganicznej i Inżynierii Środowiska.; Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydział Budownictwa i Inżynierii Środowiska.
Composites synthesized from iron(III) citrate and carbon spheres, and activated with
potassium compounds were prepared and then characterized using XRD, SEM, and low-temperature
nitrogen adsorption methods. The adsorption properties of the composites toward carbon dioxide
were assessed using CO2 uptake measurement, as well as by measuring their selectivity toward carbon
dioxide, given their further application as photocatalysts for the reduction of this gas. The effect of
changing preparation conditions on the structural and adsorption properties of the material was
assessed. The potential strength of such material is a synergistic effect between the high adsorption
capacity related to the microporosity of carbon spheres combined with the catalytic properties of
iron particles.
Bibliografia publikacji pracowników Akademii Rolniczej w Szczecinie za rok 2002
(Wydawnictwo Akademii Rolniczej w Szczecinie, 2003) Jankowska, Elżbieta opracowała; Akademia Rolnicza w Szczecinie
Data-Based Estimation of Parameters for Time-Inhomogeneous CTMC Birth-and-Death of Call Centers
(EUROSIS-ETI, 2023-10-24) Burak, Maciej, Rafał; West Pomeranian University of Technology in Szczecin, Poland
In this paper, we present a novel approach to estimate parameters of a queuing model using real call center data. Our approach leverages the transient solution of an inhomogeneous continuous-time Markov chain (CTMC) queuing model emulating the behavior of the genuine system. Specifically, to assess the fidelity of our modeling approach, we use an example of approximating the real call center system with an inhomogeneous M(n)/M/c/K + M CTMC model. To do this, we utilize authentic call center data for replicating the behavior of the real system through our model. In particular, the model incorporates the true time-dependent rates for the arrival process, service rates, and the number of available servers. Our analysis focuses on assessing the accuracy of the Markovian assumptions made for modeling customer abandonment during waiting periods. Furthermore, we investigate the performance of our model under two distinct scenarios: overloaded systems and systems operating in a quality-driven mode. By examining these cases, we ascertain the effectiveness of our assumptions in accurately representing the behavior of the call center. Finally, we demonstrate the practical application of our findings by showcasing how a simple and computationally efficient M(n)/M/c/K+M Markovian approximation of a real call center can be used for accurate personnel planning while adhering to service-level constraints.
Data-Based Estimation of Parameters for Time-Inhomogeneous CTMC Birth-and-Death of Call Centers. [Presentation]
(2023) Burak, Maciej, Rafał; West Pomeranian University of Technology in Szczecin, Poland
Bibliografia publikacji pracowników Akademii Rolniczej w Szczecinie za rok 2001
(Wydawnictwo Akademii Rolniczej w Szczecinie, 2003) Jankowska Elżbieta opracowała; Akademia Rolnicza w Szczecinie