Претрага
808 items
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A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor
Miloš Milenković, Miloš Gligorić, Nebojša Bojović, Zoran Gligorić. "A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor" in Transportation Planning and Technology, Informa UK Limited (2023). https://doi.org/10.1080/03081060.2023.2245389
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Environmental Energy Security Indicators as Tools for Environmental Protection
Еколошка прихватљивост је постала незаменљив синтезни показатељ сваке валидне енергетске анализе у последње две-три деценије. Енергетска безбедност је у директној хармонији с еколошком прихватљивошћу кроз многе прописане политичке циљеве, економске користи, правне тековине итд. Индикатори еколошке сигурности представљају један од основних елемената за одређивање енергетске безбедности и снажне алате за усмеравање енергетског сектора ка одрживом развоју. У овом раду, анализа је била концентрисана на показатеље енергетске безбедности у области животне средине који се односе на сектор природног гаса у ...енергетска безбедност, еколошки енергетски индикатори, заштита животне средине, еколошка прихватљивостAleksandar Madžarević, Dejan Ivezić, Marija Živković , Miloš Tansijević. "Environmental Energy Security Indicators as Tools for Environmental Protection" in Mining and Environmental Protection-MEP 2019, University of Belgrade, Faculty of Mining and Geology (2019)
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Correlation of uniaxial compressive strength with the dynamic elastic modulus, p –wave velocity and s –wave velocity of different rock types
Knowing mechanical properties of rocks incorporated with ultrasonic waves velocities investigations provide a secure basis for mine modelling. Uniaxial compressive strength, dynamic elastic modulus and ultrasonic waves velocities are just some of the rock properties that indicate on presence of discontinuities, stratification and fissures of rocks. Determining the relationship of these rock properties testing the rock samples that are corresponding to different rock types extracted from different mineral deposits represents the core of this study. In this paper, we ...Jelena Majstorović, Miloš Gligorić, Suzana Lutovac, Milanka Negovanović, Luka Crnogorac. "Correlation of uniaxial compressive strength with the dynamic elastic modulus, p –wave velocity and s –wave velocity of different rock types" in Underground mining engineering, Рударско - геолошки факултет - Београд (2019)
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Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example
... Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, Irena Georgievska Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Regional Slope Stability Analysis in Landslide ...
... China Elias Garcia-Urquia Civil Engineering Department National Autonomous University of Honduras Tegucigalpa, Honduras Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, and Irena Georgievska ...
... map which was created in previous research for the same area, the new maps were more difficult to parameterize, with sufficient certainty, so back analysis is a very useful convenience of this particular case study. In conclusion, regional scale deterministic landslide assess- ment is desirable tool ...Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, Irena Georgievska. "Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example" in Understanding and Reducing Landslide Disaster Risk, Springer International Publishing (2020). https://doi.org/10.1007/978-3-030-60227-7_29
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Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes
Jelena Malenović Nikolić, Dejan Vasović , Ivana Filipović , Stevan Mušicki, Ivica Ristović . "Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes" in Energies (2016). https://doi.org/https://doi.org/10.3390/en9121071
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Analysis of the correlation between modified secondary and primary compression index on the example of old municipal waste in Serbia
The paper presents the results related to the determination of the index of primary and maximum and minimum indices of secondary compression, i.e. modified primary and secondary compression indices (Cc, Cc', C'min, C'max), obtained by laboratory testing of artificially prepared municipal waste samples (three series of 9 samples in total) in an oedometer apparatus with a diameter of 20 cm. Old municipal waste was used, which was taken from two landfills in Serbia, one that is ...municipal solid waste, secondary compression index, ratio of modified secondary and primary compression indexDragoslav Rakić, Irena Basarić Ikodinović, Jovana Janković, Tina Đurić. "Analysis of the correlation between modified secondary and primary compression index on the example of old municipal waste in Serbia " in 20th International Conference on Soil Mechanics and Geotechnical Engineering (ICSMGE), ICMS Australasia (2022)
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Hydrodynamic analysis application of contaminated groundwater remediation to oil hydrocarbons
U ovom radu sagledana je primena hidrodinamičke analize u okviru odabrane remedijacione metode ,,pumpanja i tretiranja” kontaminiranih podzemnih voda ugljovodonicima, na primeru pretakališta rafinerije nafte u Pančevu. Primenjena hidrodinamička analiza predstavlja pravilan, a sve češće i neophodan pristup u savremenoj hidrogeologiji. Prethodnim hemijskim analizama uzoraka tla i podzemnih voda na istražno-osmatračkim objektima detektovano je zagađenje produktima nafte. Novoizvedena istraživanja obuhvatila su izvođenje 12 pijezometara različitih dubina, geoelektrično sondiranje tla, ,,in situ” merenja prisutnog kontaminanta, izdvojenog kao hidrofobna faza LNAPL, ...Predrag Pajić, Aleksandar Čalenić, Dušan Polomčić, Dragoljub Bajić. "Hydrodynamic analysis application of contaminated groundwater remediation to oil hydrocarbons" in Tehnika, Centre for Evaluation in Education and Science (CEON/CEES) (2018). https://doi.org/10.5937/tehnika1706825P
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Simulation of groundwater regime and quantification of groundwater balance by means of hydrodynamic analysis: Case of open-cast mine 'Jakovačka Kumša'
Hidrodinamička analiza, kao metodološki postupak, korišćena je za simulaciju režima i kvantifikaciju bilansa podzemnih voda na širem području Površinskog kopa „Jakovačka Kumša“. Istražni prostor obuhvata i deo beogradskog izvorišta podzemnih voda koje se nalazi u neposrednoj blizini površinskog kopa, u priobalju reke Save. Na površinskom kopu se vrši eksploatacija peska, koji se koristi kao građevinski materijal. Analizom i sintezom podataka koji se odnose na geološke i hidrogeološke ka-rakteristike područja, u radu je prikazan trodimenzionalni hidrogeološki model istražnog područja. Prevođenje ...hidrogeološki model, hidrodinamički model, izvorište podzemnih voda, numerička metoda konačnih razlika, ModflowDušan Polomčić, Dragoljub Bajić, Jelena Ratković, Đorđije Božović, Predrag Pajić. "Simulation of groundwater regime and quantification of groundwater balance by means of hydrodynamic analysis: Case of open-cast mine 'Jakovačka Kumša'" in Tehnika, Centre for Evaluation in Education and Science (CEON/CEES) (2019). https://doi.org/10.5937/tehnika1901056P
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Hidrohemijske karakteristike termomineralnih voda Mataruške Banje
Snežana Kretić, Jana Štrbački (2022)Mataruška Banja je naseljeno mesto u Centralnoj Srbiji, koje teritorijalno pripada opštini Kraljevo. Banja je poznata po prirodnim lekovitim vodama visokih temperatura. Formiranje termomineralnih voda vezuje se za rasprostranjenje magmatskih stena. Cilj rada je definisanje hidrohemijskog sastava ovih voda i razmatran je kroz rezultate osam kompletnih hemijskih analiza i jedne skraćene hemijske analize, uzete sa bunara MB-2/81. Hidrogeološka istraživanja, uzorkovanje i izrada kompletnih hemijskih analiza izvršeni su u periodu od 1981. do 2004. godine, dok je uzorkovanje i izrada ...Mataruška Banja, termomineralne vode, kvalitet podzemnih voda, vodonik-sulfid, metasilicijumska kiselinaSnežana Kretić, Jana Štrbački . "Hidrohemijske karakteristike termomineralnih voda Mataruške Banje" in XVI Srpski simpozijum o hidrogeologiji sa međunarodnim učešćem, 28.09−02.10.2022, Zlatibor, Srbija, Rudarsko-geološki fakultet (2022)
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Primary crusher site selection in open pit mines - case study in Sungun copper mine
Facility site selection, (such as Primary or in pit Crusher location) is one of the most important steps in mine de-sign process that has a significant impact on economy of the mining operation. This study covers an attempt to find the optimal location forprimary crusher in order to support the expansion of Sungun copper mine, which is the second largest open pit mine in Iran. Recent exploration drilling has led to a considerable increase in the ore reserve. Therefore, ...Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Mehdi Rahmanpou. "Primary crusher site selection in open pit mines - case study in Sungun copper mine" in Underground mining engineering, Универзитет у Београду, Рударско-геолошки факултет (2021)
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Pre-failure deformation monitoring as rockfall prediction tool
Miloš Marjanović, Biljana Abolmasov, Zoran Berisavljević, Marko Pejić, Petko Vranić. "Pre-failure deformation monitoring as rockfall prediction tool" in IOP Conference Series: Earth and Environmental Science, IOP Publishing (2021). https://doi.org/10.1088/1755-1315/833/1/012197
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Preliminary regional landslide susceptibility assessment using limited data
Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska (2019)In this paper a heuristic approach for preliminary regional landslide susceptibility assessment using limited amount of data is presented. It is called arbitrary polynomial method and takes into account 5 landslide conditioning parameters: lithology, slope inclination, average annual rainfall, land use and maximum expected seismic intensity. According to the method, in the first stage, a gradation is performed for each of the carefully selected conditioning parameters by assigning so called rating points to the grid cells on which the ...Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska. "Preliminary regional landslide susceptibility assessment using limited data" in Geologica Croatica , Croatian Geological Society (2019). https://doi.org/10.4154/gc.2019.03
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Negative Impact of Backwater Levels of Danube River and its Tributaries to the Groundwater Regime in Meliorated Riverside Areas
This paper describes updated calculation methodology of Danube backwater impact, occurred as a consequence of “Đerdap I” hydropower plant operation, onto the meliorated riverside areas. This methodology is based on hydrodynamic analysis of groundwater regime (size, duration, level and inflow changes) and quantification of melioration areas impairment which is caused by “Đerdap I” hydropower plant operation. By comparing the groundwater regime elements, obtained by variant hydrodynamic calculation in mathematical models for natural – not backed up and actual – ...HPP ''Djerdap 1'', backwater influence, groundwater regime, hydrodynamic analysis, melioration area, drainage system, additional energy engagementPredrag Pajić, Uroš Urošević, Dušan Polomčić, Milan Dimkić. "Negative Impact of Backwater Levels of Danube River and its Tributaries to the Groundwater Regime in Meliorated Riverside Areas" in IWA Specialist Groundwater Conference, Conference Proceedings and Book of Abstracts, 09-11 June 2016, Belgrade, Serbia, Institut Jaroslav Černi (2016)
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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)... Information sciences, 8, 199—249. Š| CHANG D. Y. (1996) Applications of the extent analysis method on fuzzy AHP, Rur. J. Oper. Res., 95, 649 655. “} ZnU K., Y. JING, D. CHANG (1999) A discussion on extent analysis method and applications of fuzzy AHP, Eur. J. Oper. Res., 116, 450 456. TOLGA FE ...
... relaying: knowledge and expressing; opinions, the paper tests a fuzzy optimization methodology that uses linguistic variables. Consequently, extent analysis is applied to fuzzy AHP by means of triangular fuzzy numbers to arrive at a decision about the optimal mining; technology. The entire proce- dure ...
... all the criteria relative to alternative solutions plays a major role in optimal decision making. The solutions are optimized by fuzzy extent analysis, applying the FAHP method described in |*|. The optimization procedure and decision making; are presented in seven steps [12]. Step 1. Mathematical ...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 (2023)
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Chalcopyrite Floatability in Flotation Plant of the Rudnik Mine
У раду је приказан део резултата обимних индустријских испитивања утицаја финоће млевења руде на резултате флотације минерала олова, бакра и цинка из руде рудника "Рудник". На основу резултата индустријских испитивања, констатовано је да се при једностепеном млевењу и двостепеном класирању комплексне Pb-Zn-Cu руде, појављује проблем тзв. диференцијалне мељивости. Наиме, галенит као мек минерал знатно брже се уситњава од осталих минерала у руди. Ово доводи до тога да минерал галенит прелази у ситне класе које споро флотају, а у ...... largest loss of copper, 57%, is in a *coarse” fraction above 74 um. Mineralogical analysis results of lead underflow, copper concentrate and copper underflow are shown in Table 4. Based on mineralogical analysis of lead underflow (copper flotation input), it can be seen that around 47.43% of copper ...
... chalcopyrite edges. According to rational analysis 11.00-12.77% of penalizing marmatite is present in *coarse” fraction of particle size and according to the distribution 21.01% of marmatite is present. Also, 6.19-21.51% of penalizing galena according to rational analysis and 21.54% according to the di ...
... mineral occurrence in the lead underflow, copper concentrate and copper underflow. Quantitative mineral composition has been established by rational analysis based on content of metals and determined qualitative mineral composition of ore. 2. RESULTS AND DISCUSSION Particle size distribution direct ...Predrag Lazić, Đurica Nikšić, Rudolf Tomanec, Dušica Vučinić, Lidija Cvetićanin. "Chalcopyrite Floatability in Flotation Plant of the Rudnik Mine" in Journal of Mining Science, Pleiades Publishing Ltd (2020). https://doi.org/10.1134/S1062739120016552
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Long-term planning methodology for improving wood biomass utilization
The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...... set according to the case study that will be conducted. 2.2. Current state analysis Current state analysis has meant analysing both the wood biomass potential and usage of them. Also, it has included collec- tion, analysis and systematization of data on the potential of wood biomass, as well as mapping ...
... implies an analysis of gener- ated solutions according to extreme values of identified key un- certainties and consideration of how to avoid or reduce their impact (see Fig. 8). 2.7. Development of long-term scenarios The last phase of the proposed methodology is a backcasting analysis, whichmeans ...
... available potential have been defined by analysis of results obtained from interviews. Identification of stakeholders has been done on basis of previous Fig. 5. Economic parameters of optimal solution generated according to objective functions (S4 scenario). Fig. 6. Analysis of driving forces. po lit ic a ...Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković. "Long-term planning methodology for improving wood biomass utilization" in Energy, Elsevier BV (2019). https://doi.org/10.1016/j.energy.2019.03.105
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Geochemical characterization of sediments from the archaeological site Vinča – Belo Brdo, Serbia
Gorica Veselinović, Dragana Životić, Kristina Penezić, Milica Kašanin-Grubin, Nevenka Mijatović, Jovana Malbašić, Aleksandra Šajnović (2020)... maceral analysis, polished blocks were coated with a thin gold film to obtain a higher quality secondary electron image for further SEM examination. The accelerating voltage used for EDX analyses, secondary electron images, and back-scattered images was 20 kV. The qualitative and quantitative chemical compo- ...
... building material. 3.2. Grain size analysis Grain size analysis was performed on a Malvern Mastersizer 2000 instrument. For this analysis, 1 g of sample was used, previously dis- persed in 50 cm3 distilled water on an ultrasonic bath. 3.3. XRD-analysis Mineralogical analysis of ten samples was carried out ...
... but all elements from Na to Am were analyzed. 3.6. Organic petrography analysis Micropetrographic analyses were carried out on polished blocks made of whole rocks samples used for organic geochemical analysis. Maceral analysis was performed on the motorized microscope Zeiss Axio Imager II, coupled ...Gorica Veselinović, Dragana Životić, Kristina Penezić, Milica Kašanin-Grubin, Nevenka Mijatović, Jovana Malbašić, Aleksandra Šajnović. "Geochemical characterization of sediments from the archaeological site Vinča – Belo Brdo, Serbia" in CATENA, Elsevier BV (2020). https://doi.org/10.1016/j.catena.2020.104914
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Multi-elemental analysis of real water samples from the Požega area, Serbia
Nebojša Pantelić, Jana Štrbački, Ivana Maloparac, Nikola Tomašević, Biljana Dojčinović, Aleksandar Kostić (2022)Cilj ovog rada bio je ispitivanje kvaliteta realnih uzoraka vode za piće, prikupljenih sa teritorije grada Požege i okolnih seoskih naselja. Za određivanje koncentracije makro i mikroelemenata u uzorcima vode korišćena je analitička tehnika induktivno kuplovana plazma sa optičkom emisionom spektrometrijom, ICP-OES. Dobijeni rezultati upoređivani su sa maksimalno dozvoljenim kocentracijama elemenata propisanim nacionalnim Pravilnikom o higijenskoj ispravnosti vode za piće, kao i preporukama Svetske zdravstvene organizacije (WHO) i Američke agencije za zaštitu životne sredine (EPA). Analizirane vode su malomineralizovane ...Nebojša Pantelić, Jana Štrbački, Ivana Maloparac, Nikola Tomašević, Biljana Dojčinović, Aleksandar Kostić. "Multi-elemental analysis of real water samples from the Požega area, Serbia" in Zastita materijala, Inženjersko društvo za koroziju (2022). https://doi.org/10.5937/zasmat2201058P
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Crystallographic, spectroscopic, thermal and computational studies of polymeric cobalt(II)–mellitate complex with 2,2′-bipyridine
Orange single crystals of new polymeric cobalt(II) complex {[Co(bipy)(H2O)4]2[Co(μ-mell)(H2O)2]·10H2O}n, 1, were synthesized by slow evaporation method at room temperature (bipy = 2,2′-bipyridine, mell = hexaanion of mellitic acid) and its crystal structure was determined by single-crystal X-ray diffraction. The complex 1 was characterized based on elemental analysis, FTIR spectroscopy and thermal (TG/DTA) analysis followed by computational analysis of noncovalent interactions and quantum chemical calculations of interaction energies. In 1, two crystallographically different Co(II) atoms adopt a deformed octahedral geometry, ...Lidija Radovanović, Dušan P. Malenov, Marko V. Rodić, Aleksandar Kremenović, Jelena Rogan. "Crystallographic, spectroscopic, thermal and computational studies of polymeric cobalt(II)–mellitate complex with 2,2′-bipyridine" in Journal of Molecular Structure, Elsevier BV (2021). https://doi.org/10.1016/j.molstruc.2021.132202
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Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering
Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić (2020)... (PG1P) was 90.50%, with 4.29% of insoluble residue (PGIR) and 5.21% of the original mass in the supernatant. Sample PGIP was also subjected to chemical analysis, phase and morphological characterization and activity concentration determination, while sample PGIR was subjected only to chem- ical ch ...
... 185 259 — 4810 The values of these indices should be <1, to indicate that the radiation hazard is insignificant. Results and discussion Chemical analysis For each sample, three areas of +5 mm? were analysed by SEM- EDS and the average results obtained are listed in Table 2. The PG1 and PG2 samples ...
... al., 2017). The recrystallized PGIP sample is enriched in calcium sulfate, containing only small amounts of Al, Si and P. A more precise chemical analysis of the two samples was performed by ICP-OES, confirming the enrichment of Ca and S and the drastic depletion of Si and Fe after recrystallization ...Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić. "Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering" in Clay Minerals, Cambridge University press (2020). https://doi.org/10.1180/clm.2020.11