Претрага
436 items
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Definition of criteria and alternatives for choosing the optimal mining method deposits when applying multi – criteria optimization
Sanja Bajić, Dragoljub Bajić, Branko Gluščević, Radmila Gaćina, Josip Išek. "Definition of criteria and alternatives for choosing the optimal mining method deposits when applying multi – criteria optimization" in Underground mining engineering, University of Belgrade, Faculty of Mining and Geology (2024)
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Definition of criteria and alternatives for choosing the optimal mining method deposits when applying multi: Criteria optimization, Belgrade, June 2024
Sanja Bajić, Dragoljub Bajić, Branko Gluščević, Radmila Gaćina, Josip Išek. "Definition of criteria and alternatives for choosing the optimal mining method deposits when applying multi: Criteria optimization, Belgrade, June 2024" in Podzemni radovi, Beograd, jun 2024, Centre for Evaluation in Education and Science (CEON/CEES) (2024). https://doi.org/10.5937/podrad2444071B
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2D geoelectrical resistivity tomography application at the former city waste dump "Ada Huja": Eco-geological problem
Branislav Sretenović, Filip Arnaut, Ivana Vasiljević, Vesna Cvetkov. "2D geoelectrical resistivity tomography application at the former city waste dump "Ada Huja": Eco-geological problem" in Podzemni radovi, Centre for Evaluation in Education and Science (CEON/CEES) (2019). https://doi.org/10.5937/PodRad1934059S
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Availability as a dimension of energy security in the Republic of Serbia
Boban Pavlović, Dejan Ivezić (2016)There is a range of modern approaches and models in literature for the evaluation and determination of energy security, which are based on different parameters and indicators. For most of them, a common characteristic is emphasizing the avail ability of energy, as an important dimension for ensuring energy security. In this paper, concise overview of Serbian energy sectors is given and appropriate energy indicators are defined and determined. Selected indicators provide insight into the main components that characterize availability ...Boban Pavlović, Dejan Ivezić. "Availability as a dimension of energy security in the Republic of Serbia" in Thermal Science, National Library of Serbia (2016). https://doi.org/10.2298/TSCI160923303P
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Improvement of geodatabase queries within GeolISS
Ranka Stanković (2008)Ranka Stanković. "Improvement of geodatabase queries within GeolISS" in Review of the National Center for Digitization, Beograd : Faculty of Mathematics, Belgrade (2008)
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An oilfield in Libya: A new model to enhance waste water disposal
... the produced water at the entrance of the hydrophobic layer. The separated oil overflows from the top of the hydrophobic layer, returning to the tank (R-1, R-2 or R-3), while the separated water falls to the bottom of the tank and is discharged through a siphon tube. The water quality at the outlet ...
... existing system of reservoir water disposal into storage pits will not be adequate to meet the increasing water production. Besides, the discharge of produced water without previous treatment is ecologically unacceptable. In this paper, a modern concept of produced water preparation is proposed, and ...
... surface waterways. Furthermore, water production is expected to increase in the Amal oil field. From a technical point of view, the existing system of reservoir water disposal into storage pits will not be adequate to meet the increasing water production. Waste water stored for evaporation in in- ground ...Dušan Danilović, Vesna Karović Maričić, Nori Elhaddad, Branko Leković. "An oilfield in Libya: A new model to enhance waste water disposal" in Energy & Environment (2016)
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Design of a sucker rod pumping system
Ana Ponoćko (2024)For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...... function of the formation volume factor, the oil formation volume factor Bo (m*/m*), and the water formation volume factor Bw (m?/m?): qo+qw 32 n qoBo+qwBw — qo - oil production, (m*/m*) — qw- water production, (m?/m?) If all the gas passes through the pump, the volumetric efficiency increases ...
... Figure 3.1. Underground Equipment for Sucker Rod Pump 10 3.1.1 Plunger of a Sucker Rod Pump The plunger of a deep well pump is crafted from high-quality steel tubing. A molten metal layer is applied to the heated surface of the plunger, which is then ground and polished. The outer surface of the ...
... reduced to the full cross-section of the annular space of the anchor without gas (m/s) 3.3 Sucker Rods Sucker rods are manufactured from high-quality steel with a solid round cross-section and are used to transmit energy from the surface equipment (horsehead) to the downhole pump. Their lengths ...Ana Ponoćko. Design of a sucker rod pumping system, 2024
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A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach
Nikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović (2024)This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...fuzzy logic, max-min composition, continuous part of combined system (CCS), open pit, mining, dependabilityNikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović. "A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach" in Applied Sciences, Basel, August 2024, MDPI (2024). https://doi.org/https://doi.org/10.3390/app14177947
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Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils
Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteuriiOlja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov. "Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils" in Microorganisms, MDPI AG (2021). https://doi.org/10.3390/microorganisms9081691
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Structural characterization of traditional pottery produced from local clay, Rujište (Ražanj, Central Serbia), in an effort to preserve its geoheritage
Maja Milošević, Biljana Đorđević, Alena Zdravković . "Structural characterization of traditional pottery produced from local clay, Rujište (Ražanj, Central Serbia), in an effort to preserve its geoheritage" in 9th International Conference Mineralogy and Museums, Sofia, Bulgaria, Earth and Man National Museum and Bulgarian Mineralogical Society (2021)
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Ecological status of the Lim river alluvium in Serbia
Amel Kurbegović, Boris Vakanjac, Vesna Ristić Vakanjac, Mirjana Bartula, Zorana Naunović, Nikola Milovanović, Jovan Kovačević (2022)Three countries share the catchment of the Lim River and they have been engaged in an eco-logical struggle for years, to conserve the river, its tributaries, and biodiversity. Honoring international conventions and declarations, along with active involvement of the civil society and support of Eu-ropean Union agencies, major efforts are being made to draw attention to the degradation of nature, especially water, which is essential for life on the planet Earth. Considering that natural resources are limited and that ...Amel Kurbegović, Boris Vakanjac, Vesna Ristić Vakanjac, Mirjana Bartula, Zorana Naunović, Nikola Milovanović, Jovan Kovačević. "Ecological status of the Lim river alluvium in Serbia" in Fresenius Environmental Bulletin, Parlar Scientific Publications (2022)
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Centar za hidrogeologiju karsta - 15 godina nauke i struke
... • Methods of water research in karst. • Characterization and conceptual definition of water circulation in karst, connection with otherT aquifers and surface Waters. • Water balancing in karst, the problem of delineating watersheds. • Specifics of the quantity and quality dynamics of karst ...
... groundwater quality in the test areas, CCWatersS – Climate Change and Impact on Water Supply., Edt. Stevanović Z., Ristić Vakanjac V., Milanović S. University of Belgrade-FFaculty of Mining & Geology, Belgrade, pp. 259-285. Ristić Vakanjac, V., Stevanović, Z., Milanović, S. (2012): Availability of water resources ...
... fluorescent lamp, protective suits, standards and other supporting equipment). In-situ water quality monitoring The CKH is equipped with modern devices for testing the physico-chemical parameters of water directly in the field. CKH has devices for measuring: T (*C), pH, Turbidity (NTU), EFlectrical ...urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović. Centar za hidrogeologiju karsta - 15 godina nauke i struke, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, Centar za hidrogeologiju karsta, 2023
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Development of an Integrated Model for Open-Pit-Mine Discontinuous Haulage System Optimization
Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević, Dejan Stevanović (2024)The selection of the optimal equipment for discontinuous haulage systems is one of the most important decisions that need to be made when an open-pit mine is designed. There are a number of influencing factors, including natural (geological and environmental), technical, economic, and social. Some of them can be expressed numerically, in certain units of measure, while others are descriptive and can be stated by linguistic variables depending on the circumstances of the project. These factors are characterized by ...Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević, Dejan Stevanović. "Development of an Integrated Model for Open-Pit-Mine Discontinuous Haulage System Optimization" in Sustainability, MDPI (2024). https://doi.org/doi.org/10.3390/su16083156
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Development of an integrated model for open-pit-mine discontinuous haulage system optimization
Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović (2024)Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović . "Development of an integrated model for open-pit-mine discontinuous haulage system optimization" in Sustainability, MDPI (2024). https://doi.org/10.3390/su16083156
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Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike
Мирослав Црногорац, Душан Даниловић, Лола Томић. "Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike" in IX Naučno stručni skup Preduzetništvo, inženjerstvo i menadžment Zrenjanin, 24.10.2020. god., Visoka tehnička škola strukovnih studija u Zrenjaninu (2020)
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Fault type assessment based on vertical gravity gradient anomalies – advantages and limitations
The type of dip-slip faults can be assessed based on the analysis of vertical gravity gradients. Theoretically, just a simple comparation of the gradient extreme values can give us an answer whether the fault is normal or reverse (thrust). Practical application of this method is far more complicated and the results depend on a number of parameters, such as a complexity of geological setting, the quality of gravity data, dip angle and displacement of the fault, density contrast, etc. ...... application of this method is far more complicated and the results depend on a number of parameters, such as a complexity of geological setting, the quality of gravity data, dip angle and displacement of the fault, density contrast, etc. Both the advantages and the limitations of the method based on using ...
... OLIIIITHHA HOBALIH Hristina Petrova, Pera Stojkovska, Dimitar Petrov 114 117 125 133 139 148 156 10. HYDROGEOLOGICAL RESEARCH FOR THE WATER SUPPLY NEEDS OF THE CITY OF SREBRENIK, BOSNIA AND HERZEGOVINA Meris Hajdarević, Dinka Pašić-Škripić, Izet Žigić O GG 160 MEPKH H AKTHBHOCTH 3A ...Ivana Vasiljević, Snežana Ignjatović, Branislav Sretković. "Fault type assessment based on vertical gravity gradient anomalies – advantages and limitations" in Vth Congress of the Geologists of the Republic of North Macedonia, Ohrid, Republic of North Macedonia, September 27-28, 2024, Macedonian Geological Society (2024)
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Стање квалитета амбијенталног ваздуха на подручју града Београда
Марко Колачарић (2024)У овом раду анализирано је стање квалитета амбијенталног ваздуха на територији града Београда. Анализа се заснива на праћењу података о загађујућим материјама прикупљеним у 2022. години са шест мерних места на територији града. Загађивачи који су обухваћени овом радом су сумпор-диоксид (SO2), азот-диоксид (NO2), честични загађивачи (PM2.5 и PM10), тропосферски озон (О3) и угљен-моноксид (СО). На основу добијених резултата предложене су мере за побољшање тренутног система. Констатовано је прекорачење законских граница на свим мерним местима, за једну или више ...... KJbyuHe peuiH: MoHuTopunr, aHa.mH3a, 3araljuBauu, KBajirTeT Ba3jliyxa, Beorpaji The state of ambient air quality in the area of Belgrade city Abstract: This paper analyzes the air quality status in the city of Belgrade. The analysis is based on monitoring data of pollutants collected in 2022 ...
... was found that legal limits were exceeded at all measurement sites, for one or more pollutants. Keywords: monitoring, analysis, pollutants, air quality, Belgrade CriHcak cJiBHKa: Cmaka 1 Teorpadicku nonoxaj rpana Beorpana Cmaka 2 Knace craOuzaocTu arMocO(epe [9] al aaaaaanaaaaakane 10 CmKa ...
... Bpe/jiHocTH cy Jnare y raOema T 1. OBa VpeyiGa je y cBeMy ycarnanteHa ca HOpMaMa JaraM y nupekTuBH Epporncke aajenHune 2008/50/EC (On Ambient Air Quality And Cleaner Air). Pasaka BaMeby noMahe ypen0e H eBpOHCKe JHpeKTHBE OrueJla Ce y nojarTky ypen0e y KOJeEM Ce IHIpOnHcCy]je poK 3a NOcCTH3aMPe HpOHHCaHHX ...Марко Колачарић . Стање квалитета амбијенталног ваздуха на подручју града Београда, 2024
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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. ...... transformation and improvement of the heating system are essential for achieving goals in the field of improving the environmental condition and the quality of life as well as reducing the negative effects of climate change. �Zivkovi�c et al. [46], presented a methodology which combines modelling urban ...
... workshop. Based on the research carried out in Ref. [49], it has pointed out that the traditional approach with two workshops negatively affects the quality of the obtained results. Instead of that, it is recommended to provide stakeholders’ participation throughout the complete process and only one workshop ...
... it is proposed as useful to re-analyse stakeholder’s power and interest. It is possible to involve additional stakeholders in order to ensure the quality in some cases. 3. Results Developed methodology has been applied and tested on a case study e Improving and maximizing utilization of forest biomass ...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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Analysis of the exhaust emissions inventory from auxiliary mining machines
Stevan Đenadić, Aleksandar Mirković, Jovana Mitrović, Filip Miletić, Predrag Jovančić, Dragan Ignjatović (2023)Open-pit coal mines are equipped with a large number of mining machines and vehicles with diesel engines. Due to common daily operation of these machines and vehicles large amounts of exhaust gases which contain numerous pollutants are emitted into the atmosphere. The demand to reduce air pollution induced the activities in developed countries to map and calculate all gases emitted by industries to formulate and select adequate preventive activities. In collaboration with machine manufacturers, emission standards for off-road machines ...Stevan Đenadić, Aleksandar Mirković, Jovana Mitrović, Filip Miletić, Predrag Jovančić, Dragan Ignjatović. "Analysis of the exhaust emissions inventory from auxiliary mining machines" in 9th International Conference Mining and Environmental Protection, University of Belgrade, Faculty of Mining and Geology (2023)
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Digitalizacija u rudarstvu: Kreiranje sistema za efikasno poslovno izveštavanje
Proces donošenja odluka u oblasti rudarstva i geologije uslovljen je blagovremenim posedovanjem kvalitetnih podataka i informacija. Kompleksnost rudarskih procesa nalaže prikupljanje podataka na dnevnom odnosno na smenskom nivou. Podaci kao takvi bez analitičkog pristupa nisu dovoljni. Kako bi pristup podacima bio brz i efikasan neophodno je posedovanje adekvatnog digitalnog rešenja uz adekvatne centralizovane baze podataka. U ovom radu je dat pregled trenutne pozicije rudarstva sa aspekta digitalne transformacije kao i predlog jednostavnog prototipa u obliku digitalnog sistema za poslovno ...... digitalna transformacija, baze podataka. Abstract The decision-making process in the field of mining and geology is conditioned by timely access to quality data and information. The complexity of mining processes requires data collection on a daily or shift basis. Data, as such, without an analytical ...Stevan Đenadić, Aleksandar Mirković, Veljko Rupar . "Digitalizacija u rudarstvu: Kreiranje sistema za efikasno poslovno izveštavanje" in XVI Međunarodna rudarska konferencija OMC 2024, Zlatibor, 9 - 12. oktobar 2024, Jugoslovenski komitet za površinsku eksploataciju (2024)