Претрага
3476 items
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Estimating hydraulic parameters for the complex hydrodynamic models
Hydrodynamic models have usually been calibrated manually, by trial-and-error, with different values of hydraulic parameters and hydraulic characteristics of boundary conditions. This method of calibration and estimation of hydraulic parameters requires an extensive knowledge and experience of experts, but whether the resulting solution includes an optimal set of parameters still remains an open question. An optimization method founded upon the Gauss-Marquardt-Levenberg algorithm, along with PEST software based on that algorithm, introduces automation of model calibration with regularization, which substantially ...Dušan Polomčić, Dragoljub Bajić, Jelena Ratković, Bojan Hajdin. "Estimating hydraulic parameters for the complex hydrodynamic models" in Mining and Metallurgy Engineering Bor, Centre for Evaluation in Education and Science (CEON/CEES) (2018). https://doi.org/10.5937/mmeb1704029P
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Probabilistic analysis of anisotropic rock slope with reinforcement measures
During the construction of E75 highway through Grdelica gorge in Serbia, a major failure occurred in the zone of reinforced rock slope. Excavation was performed in highly anisotropic Paleozoic schist rock formation. The reinforcement consisted of the two rows of micropile wall with pre-stressed anchors. Forces in anchors were monitored with load cells while benchmarks were installed for superficial displacement measurements. The aim of the study is to investigate possible causes of instability considering different probability distributions of the ...Zoran Berisavljević, Dušan Berisavljević, Miloš Marjanović, Svetlana Melentijević. "Probabilistic analysis of anisotropic rock slope with reinforcement measures" in Geomechanics and Engineering (2023). https://doi.org/10.12989/gae.2023.34.3.285
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Application of the PROMETHEE and VIKOR methods for selecting the most suitable carbon dioxide geological storage option
CO2 storage in geological formations is one of the leading solutions for mitigation of greenhouse gas emissions. Types of geological formations that can be used for CO2 storage, that are discussed in this paper are: depleted oil and gas reservoirs, saline aquifers and injection CO2 in partially depleted oil reservoirs for enhanced oil recovery (EOR–CO2 method). In order to select the most suitable geological storage of CO2, the ranking of these storage options was performed using two methods of ...Lola Tomić, Vesna Karović Maričić, Dušan Danilović, Branko Leković, Miroslav Crnogorac. "Application of the PROMETHEE and VIKOR methods for selecting the most suitable carbon dioxide geological storage option" in Underground Mining Engineering, Belgrade : University Of Belgrade - Faculty of Mining and Geology (2019)
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Effect of natural gas composition on methane number: A case of gas reservoirs in Serbia
Natural gas is considered as the most environmentally acceptable fossil fuel, thus it is an alternative to petroleum derivate, dominantly used in internal combustion engines. Physical properties of a fuel as well as behavior during combustion process are affected by its composition. This article presents analysis of effect of natural gas composition on methane number (MN), conducted for natural gas deposits in Serbia. For empirically determination of MN: California air resources board (CARB) method and Linear and Anstalt für ...Marija Živković, Milica Ivić, Dejan Ivezić, Aleksandar Madžarević. "Effect of natural gas composition on methane number: A case of gas reservoirs in Serbia" in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects (2017). https://doi.org/10.1080/15567036.2017.1403518
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Development of Integrated Fuzzy Model for Mine Management Optimization
Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)Technoeconomic, environmental and safety criteria generally affect the management of metallic and non-metallic mining operations. The first basic question that needs to be addressed when planning ore mining is which methods are adequate and what is the optimal mining technology? Due to the complex geologic framework of ore deposits, geological exploration has rendered synonymous the inherent uncertainties, vagueness, and inaccuracies. As a result, subjective evaluation by engineers and expert experience have become increasingly important. Given that the natural language ...Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić. "Development of Integrated Fuzzy Model for Mine Management Optimization" in Comptes rendus de l’Académie Bulgare des Sciences, Bulgarian Academy of Sciences (2023). https://doi.org/10.7546/CRABS.2023.09.12
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Transformer-Based Composite Language Models for Text Evaluation and Classification
Parallel natural language processing systems were previously successfully tested on the tasks of part-of-speech tagging and authorship attribution through mini-language modeling, for which they achieved significantly better results than independent methods in the cases of seven European languages. The aim of this paper is to present the advantages of using composite language models in the processing and evaluation of texts written in arbitrary highly inflective and morphology-rich natural language, particularly Serbian. A perplexity-based dataset, the main asset for the ...Mihailo Škorić, Miloš Utvić, Ranka Stanković. "Transformer-Based Composite Language Models for Text Evaluation and Classification" in Mathematics, MDPI AG (2023). https://doi.org/10.3390/math11224660
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Efekti potencijalnog korišćenja postrojenja za preradu otpadnih voda kao energetskih izvora u sistemima daljinskog grejanja u Srbiji
Системи даљинског грејања постоје у 57 градова и општина у Србији и доминантно користе фосилна горива. У овим урбаним срединама су изграђени, или се планира градња система за пречишћавање отпадних вода. У раду је размотрена (са еколошког и енергетског аспекта) могућност додатног, енергетског коришћења топлоте пречишћене воде у СДГ, применом топлотних пумпи. На примеру Шапца је извршено поређење постојећег СДГ са системом који би применом топлотних пумпи искористио енергетски потенцијал система за пречишћавање отпадних вода. Добијени индикатори су послужили ...... дана", систем даљинског грејања ради 24 сата дневно. Могући број "ледених дана" је 10 до 15 током јануара и фебруара. Просечан број радних сати топлане износи 3.000 сати годишње у периоду од 1.10. до 30.4. Када дневне температуре прелазе 14 ℃, систем грејања прекида рад. Минималне температуре у току ...
... пројектовања, већ га је могуће само оценити с обзиром на предвиђене услове рада. У разматраном случају града Шапца, где би се као топлотни извор користила вода температуре 10 до 15°C, док је потрошач систем даљинског грејања који ради у високотемпературном режиму (80°C), COP би у најнеповољнијем случају ...
... енергије и режим рада топлотне пумпе зависе од тога како се топлотна пумпа интегрише у систем даљинског грејања. Као што је раније показано, базна потрошња топлотне енергије у систему даљинског грејања у Шапцу износи 9,5 MW. У том смислу постоје услови да топлотна пумпа капацитета 7,2 MW ради 2800 сати ...Dejan Ivezić, Marija Živković, Aleksandar Madžarević . "Efekti potencijalnog korišćenja postrojenja za preradu otpadnih voda kao energetskih izvora u sistemima daljinskog grejanja u Srbiji" in Stručno-naučna konferencija TOPS 2019, Poslovno udruženje toplana Srbije (2019)
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Karakteristike klizišta i odrona na dolinskim stranama Lima u njegovom toku kroz Srbiju
Sunarić Duško, Jevremović Dragutin (2010)Sunarić Duško, Jevremović Dragutin. "Karakteristike klizišta i odrona na dolinskim stranama Lima u njegovom toku kroz Srbiju" in XV Kongres geologa Srbije, Beograd:Зборник радова 15. конгреса геолога Србије са међународним учешћем, Београд, [26-29 мај] 2010. = Proceedings of the 15th Congress of Geologists of Serbia with International Participation, Belgrade [26 (2010): 489-495
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Contribution to Determiing Harmless Distancewhile Blasting at Facility Podbukovi – Valjevo
Trajković Slobodan, Lutovac Suzana, Damnjanović Vesna, Ravlić Marina. "Contribution to Determiing Harmless Distancewhile Blasting at Facility Podbukovi – Valjevo" in IV internacionalni naučno-stručni skup građevinarstvo nauka i praksa, Zbornik radova, Žabljak, Crna Gora :Univerzitet Crne Gore Građevinski fakultet (2012): 1007-1014
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A Method for defining the boundaries of an open pit according to the surface
Hristov Stojan, Dimitrijević Bojan (2011)Hristov Stojan, Dimitrijević Bojan. "A Method for defining the boundaries of an open pit according to the surface" in Zbornik radova 5. Međunarodna konferencija UGALj 2011 no. V, Златибор, Србија :Jugoslovenski Komitet za površinsku eksploataciju Saveza inženjera rudarstva i geologije Srbije (2011): 79-88
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Mašine i uređaji za flotacijsku koncentraciju i odvodnjavanje - novi trendovi
Kostović Milena, Deušić Slaven, Knežević Dinko, Vučinić Dušica. "Mašine i uređaji za flotacijsku koncentraciju i odvodnjavanje - novi trendovi" in Zbornik radova VIII Kolokvijuma o pripremi mineralnih sirovia: Savremena oprema za pripremu mineralnih sirovina, Beograd, Srbija:Univerzitet u Beogradu, Rudarsko-geološki fakultet, Katedra za pripremu mineralnih sirovina (2012): 65-82
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Pregled povreda u rudnicima Javnog Preduzeća za Podzemnu Eksploataciju Uglja, u periodu 2011-2015.
Milisavljević Vladimir, Milinković D., Cvjetić Aleksandar. "Pregled povreda u rudnicima Javnog Preduzeća za Podzemnu Eksploataciju Uglja, u periodu 2011-2015." in Zbornik radova sa 5. naučno-stručnog skupa Podzemna eksploatacija mineralnih sirovina 2017, Beograd, 8. decembar 2017., Beograd.:University of Belgrade, Faculty of Mining and Geology (2017): 51-62
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Otrovni gasovi koji nastaju pri miniranju, metode merenja, određivanje sigurnosnih rastojanja
Kričak Lazar, Negovanović Milanka, Cvjetić Aleksandar, Janković Ivan, Zeković Dario. "Otrovni gasovi koji nastaju pri miniranju, metode merenja, određivanje sigurnosnih rastojanja" in Zbornik radova VIII Međunarodne Konferencije Nemetali 2009, :Jugoslovenski Komitet za površinsku eksploataciju (2009): 114-125
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Quantification of Uncertainty in Mining Project Related to Metal Price Using Mean Reversion Process and Interval Type-2 Fuzzy Sets Theory
Gligorić Zoran, Beljić Čedomir, Gluščević Branko. "Quantification of Uncertainty in Mining Project Related to Metal Price Using Mean Reversion Process and Interval Type-2 Fuzzy Sets Theory" in Podzemni radovi no. 22, Beograd:Univerzitet u Beogradu, Rudarsko-geološki fakultet (2013): 71-84
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Stochastic simulation and prediction of turbidity dynamics in karst systems. Case study: Mokra karst spring (SE Serbia)
Veljko Marinović, Branislav Petrović (2021)Veljko Marinović, Branislav Petrović. "Stochastic simulation and prediction of turbidity dynamics in karst systems. Case study: Mokra karst spring (SE Serbia)" in Review of the Bulgarian Geological Society, Bulgarian Geological Society (2021). https://doi.org/10.52215/rev.bgs.2021.82.3.222
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Simulation of Migration of Nitrate Contamination in Epikarst Groundwater: A Column Laboratory Method
Branislav Petrović (2021)Branislav Petrović. "Simulation of Migration of Nitrate Contamination in Epikarst Groundwater: A Column Laboratory Method" in Karst: From Top to Bottom, Belgrade, 6.6.2021., Belgrade : Centre for Karst Hydrogeology (2021)
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Implications of the geological characteristics and genesis of the Allchar deposit for the Lorex Project.
Boev, B., Cvetković, V., Jelenković, R., Boev, I.. "Implications of the geological characteristics and genesis of the Allchar deposit for the Lorex Project." in Geologica Macedonica 1 no. 32, Štip:Goce Delčev University in Štip, Faculty of Natural and Technical Sciences, Štip, Republic of Macedonia (2018): 5-20
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Седиментолошке карактеристике миоценских наслага Доње Трепче
Ана Зековић, Виолета Гајић, Љупко Рундић, Сабина Ковач. "Седиментолошке карактеристике миоценских наслага Доње Трепче" in 18. Конгрес геолога Србије "Геологија решава проблеме", Дивчибаре, 01-04 јун 2022., Српско геолошко друштво (2022)
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Ostracods (Crustacea) as indicators of the middle Miocene Badenian marine transgression (Central Paratethys, Bosnia and Serbia)
Ljupko Rundić (2022)Ljupko Rundić. "Ostracods (Crustacea) as indicators of the middle Miocene Badenian marine transgression (Central Paratethys, Bosnia and Serbia)" in XXII Congres of the Carpathian-Balkan Geological Association, Sofia, Geologica Balcanica (2022)
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Hidrogeološke karakteristike područja Cerničkog polja i Ključke rijeke
Петар Војновић (2022)Петар Војновић. "Hidrogeološke karakteristike područja Cerničkog polja i Ključke rijeke" in 18. Kongres geologa Srbije, Srpsko geološko društvo (2022)