11. Strong events in the sand-pile modelAlexander Shapoval, M. Shnirman, 2004, original scientific article Abstract: Here is a sand-pile introduced by Bak et al. The system accumulates particles one by one. From time to time it topples. Every toppling initiates an event. The distribution of the events' size follows a power law for all the events except the strongest ones. The fraction of the strongest events does not depend on the system length. The number of particles and their clustering increase before the strongest events.
Found in: ključnih besedah
Summary of found: ...distribution of the events' size follows a power law for all the events except the...
Keywords: sandpile, prediction, power-law
Published: 19.04.2021; Views: 1028; Downloads: 0
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15. Links between HX-groups and hypergroupsBabatunde Oluwaseun Onasanya, Irina Elena Cristea, Michal Novak, 2021, original scientific article Found in: ključnih besedah
Summary of found: ...HX-group, hyperstructure theory, Chinese hypergroupoid, EL-hyperstructure, power sets...
Keywords: HX-group, hyperstructure theory, Chinese hypergroupoid, EL-hyperstructure, power sets
Published: 03.06.2021; Views: 1163; Downloads: 0
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18. Monitoring the success of the performance of a travel agency with the Power BI toolRiste Ristov, 2022, undergraduate thesis Abstract: In today’s times, when digitalisation is advancing in all areas, travel agencies need to follow trends to optimise their work as much as possible and stay competitive. Business information systems provide a more detailed insight into business processes and their operation, which helps monitor progress and adapt to possible changes to achieve the best results in the business world. Travel agencies need a quality business information system that helps employees shift from using basic office tools to more modern and effective systems for reporting and monitoring work performance. Data is the basis on which agencies adjust, optimise and build their business. Data is available in huge quantities and a variety of formats. Raw data that is not organised into a meaningful whole cannot bring added value to the company. The thesis aims to use Power BI as a tool for editing and integrating databases in travel agencies, as well as their visualisation and display, which is understandable for the user. With the help of the tool, we will create a report which will help the travel agency improve its business and make critical decisions that are critical for success.
Found in: ključnih besedah
Keywords: Travel agency, business information system, data, database, Power BI, visualisation
Published: 30.09.2022; Views: 430; Downloads: 37
Fulltext (1,26 MB)
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19. Power spectral fractal dimension and wavelet features for mammogram analysisAmmini Renjini, Mohanachandran Nair Sindhu Swapna, Vimal Raj, Babatunde S. Emmanuel, Sankaranarayana Iyer Sankararaman, 2022, original scientific article Found in: ključnih besedah
Keywords: power spectral fractal dimension, wavelet, mammogram analysis, machine learning
Published: 30.08.2022; Views: 321; Downloads: 14
Fulltext (1,58 MB)
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20. Correlation between FeCl2 electrolyte conductivity and electrolysis efficiencyLuin Uroš, Valant Matjaz, Arčon Iztok, 2022, published scientific conference contribution abstract Abstract: The electrolysis efficiency is an important aspect of the Power-to-Solid energy storage technology (EST) based
on the iron chloride electrochemical cycle [1]. This cycle employs an aqueous FeCl2 catholyte solution for the
electro-reduction of iron. The metal iron deposits on the cathode. The energy is stored as a difference in the
redox potential of iron species. Hydrogen, as an energy carrier, is released on demand over a fully controlled
hydrogen evolution reaction between metallic Fe0 and HCl (aq) [1]. Due to these characteristics, the cycle is
suitable for long-term high-capacity and high-power energy storage. In a previous work [2] we revealed that
the electrolyte conductivity linearly increases with temperature. Contrary, the correlation between the
electrolyte concentration and efficiency is not so straightforward. Unexpectedly small efficiency variations were
found between 1 and 2.5 mol dm-3 FeCl2 (aq) followed by an abrupt efficiency drop at higher concentrations.
To explain the behavior of the observed trends and elucidate the role of FeCl2 (aq) complex ionic species we
performed in situ X-ray absorption studies. We made a dedicated experimental setup, consisting of a tubular
oven and PMMA liquid absorption cell, and performed the measurements at the DESY synchrotron P65
beamline. The XAS investigation covered XANES and EXAFS analyses of FeCl2 (aq) at different
concentrations (1 - 4 molL-1) and temperatures (25 - 80 °C). We found that at low temperature and low FeCl2
concentration the octahedral first coordination sphere around Fe is occupied by one Cl ion at a distance of 2.33
(±0.02) Å and five water molecules at a distance of 2.095 (±0.005) Å [3]. The structure of the ionic complex
gradually changes with an increase in temperature and/or concentration. The apical water molecule is
substituted by a chlorine ion to yield a neutral Fe[Cl2(H2O)4]0. The transition from the single charged
Fe[Cl(H2O)5]+ to the neutral Fe[Cl2(H2O)4]0 causes a significant drop in the solution conductivity, which well
correlates with the existing conductivity models [3].
[1] M. Valant, “Procedure for electric energy storage in solid matter. United States Patent and
Trademark Office. Patent No. US20200308715,” Patent No. US20200308715, 2021.
[2] U. Luin and M. Valant, “Electrolysis energy efficiency of highly concentrated FeCl2 solutions
for power-to-solid energy storage technology,” J. Solid State Electrochem., vol. 26, no. 4, pp.
929–938, Apr. 2022, doi: 10.1007/S10008-022-05132-Y.
[3] U. Luin, I. Arčon, and M. Valant, “Structure and Population of Complex Ionic Species in
FeCl2 Aqueous Solution by X-ray Absorption Spectroscopy,” Molecules, vol. 27, no. 3, 2022,
doi: 10.3390/molecules27030642.
Found in: ključnih besedah
Summary of found: ...efficiency is an important aspect of the Power-to-Solid energy storage technology (EST) based
on the iron...
Keywords: Iron chloride electrochemical cycle, Power-to-Solid energy storage, XANES, EXAFS, electrical
conductivity, electrolyte complex ionic species structure and population
Published: 26.09.2022; Views: 364; Downloads: 0
Fulltext (27,64 MB) |
