Претрага
967 items
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A Fuzzy Expert Model for Availability Evaluation
Each technical system within itself carries the great potential danger of possible occurrence of failure and damages. Mining machines are characteristic by great investment values, costs of unplanned shutdowns, complex working conditions, and environment and workers hazards. Systematic monitoring of the mining machinery is of great importance for the management of the mining companies. Availability is the overall concept of quality of service. Includes information regard to operating state, an idle state, a standby state and shut down. The ...... reliability, maintainability, supportability and the other constituent parts of availability are crucial and must be established and optimized for the economic success of selected machine or overall business systems [5]. The most usual consideration of the availability of machines or any other engineering ...
... Fuzzy Expert Model for Availability Evaluation Dejan Ivezic Faculty of Mining and Geology University of Belgrade Belgrade, Serbia dejan.ivezic@rgf.bg.ac.rs Milos Tanasijevic Faculty of Mining and Geology University of Belgrade Belgrade, Serbia milos.tanasijevic@rgf.bg.ac.rs Radisa ...
... приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac ...Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić. "A Fuzzy Expert Model for Availability Evaluation" in Proceedings of the 2019 20th International Carpathian Control Conference (ICCC), AGH University of Science and Technology, Kraków - Wieliczka, Poland (2019)
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An oilfield in Libya: A new model to enhance waste water disposal
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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Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine
... origin, which are not entirely homogeneous in composition. Limestones are the most important lithological members from both economic aspect and aspect of mining exploitation technology. Physical and mechanical properties of limestone in the deposit are spatially very uneven (Trajković et al. 2013). By ...
... приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac ...
... blasting, seismic effect, oscillation velocity, soil oscillation law 1 University of Belgrade – Faculty of Minig and Geology, Đušina 7, 11000 Belgrade, Serbia, e-mails: suzana.lutovac@rgf.bg.ac.rs; sanjabajic@sezampro.com; radmila.gacina@rgf.rs; marina ...Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina. "Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine" in Underground Mining Engineering, Belgrade : University of Belgrade, Faculty of Mining and Geology (2015). https://doi.org/10.5937/podrad1526009L
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The state and perspective of the natural gas sector in Serbia
The strategy of long-term energy development of Serbia identifies an increase of share of natural gas in final energy consumption as one of the main aims. Serbia has signed a strategic agreement with the Russian Federation on cooperation in the oil and gas sector, within which the project South Stream pipeline is planned to be realized. In addition, the Republic of Serbia has signed the Treaty that establishes the Energy Community and accepted the obligation to implement the Energy ...Dejan Ivezić, Marija Živković, Dušan Danilović, Aleksandar Madžarević, Miloš Tanasijević. "The state and perspective of the natural gas sector in Serbia" in Energy Sources, Part B: Economics, Planning and Policy, Taylor & Francis Group, LLC (2016). https://doi.org/http://dx.doi.org/10.1080/15567249.2013.858796
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Effectiveness Analysis of Different Bucket-wheel Excavators
Coal production in open-pit lignite mines in the Republic of Serbia is performed with continuous work systems. In addition to coal production, the same systems are used for the exploitation of large quantities of overburden. According to the reliability concept, continuous systems are in linear connection. If the failure occurs in one part of the system, that will produce a downtime of the entire system. The initial and most important factor of continuous systems is the bucket-wheel excavator. It ...Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić. "Effectiveness Analysis of Different Bucket-wheel Excavators" in 8th International Conference Mining and Environmental Protection, Sokobanja, 22-25 September 2021, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2021)
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The different approaches in seismic stratigraphy interpretation
Dejan Radivojević (2018)U tekstu su prikazana dva osnovna pristupa u seizmostratigrafskoj interpretaciji. Prvi kao polaznu osnovu ima seizmičke sekcije, čija se interpretacija u kasnijoj fazi koreliše sa bušotinskim podacima. Drugi u prvoj fazi analizira podatke dobijene dubokim bušenjem koji se kasnije korelišu sa seizmičkim sekcijama. Prikazan je hronološki redosled i objašnjen postupak pri seizmostratigrafskoj interpretaciji oba pristupa. Ovakav način interpretacije omogućio je naftnim kompanijama detaljnije i preciznije sagledavanje geoloških odnosa, smanjenje rizika istraživanja i racionalnije projektovanje razradnih bušotina.seizmostratigrafija, istraživanje nafte i gasa, karakteristične seizmičke sekvence, seiz-mofacijalna analiza... Zagreb, 2005. [8] Ramasayer G. R, Seismic Stratigraphy; a fundame- ntal exploration tool. Offshore Technology Confere- nce, April-May 1979, Proceedings, 3, 1859-1867, Houston, Texas, 1979. [9] Sangree, J. B. & Widmer, J. M, Seismic Stratigraphy and global changes in sea level Part 9: seismic ...
... LITERATURA [1] Catuneanu O, Principles of Sequence Stratigraphy, Elsevier, pp 375, Amsterdam, 2007. [2] Emery D. & Myers K. J, Sequence Stratigraphy, Bla- ckwell Science, pp 297, Oxford, 2001. [3] Mitchum R. M. Jr. & Vail P. R, Seismic stratigraphy nad global changes of sea level, part 7: stratigraphic ...
... Tulsa, Oklahoma, 1977. [5] Piggot, D. J, Introduction To A Seismic Stratigraphy and Advanced Seismic Stratigraphy, OGCI Petro- skills, p 454, Tulsa, Oklahoma, 2008. [6] Pigott D. J. & Radivojević D, Seismic stratigraphy based chronostratigraphy (SBBC) of the Serbian Banat region of the ...Dejan Radivojević. "The different approaches in seismic stratigraphy interpretation" in Tehnika – rudarstvo, geologija i metalurgija, Savez inženjera i tehničara Srbije, Beograd (2018). https://doi.org/10.5937/tehnika1802211R
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Development of non explosive fuel mixture for non-invasive procedures of obtaining the blocks of decorative stones
Kričak Lazar, Petrović D., Negovanović Milanka, Janković Ivan, Zeković Dario. "Development of non explosive fuel mixture for non-invasive procedures of obtaining the blocks of decorative stones" in Proceedings of the 1st International Conference „ Harmony of nature and spirituality in stone“, Kragujevac, Serbia:Stone Studio Association (2011): 85-89
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Structural, Morphological and Electrical Properties of Multi-Doped Calcium Phosphate Materials as Solid Electrolytes for Intermediate Temperature Solid Oxide Fuel Cells
Mirković M. Miljana, Došen, M. Anja, Erić P. Suzana, Stojmenović D. Marija, Matović Z. Branko, Rosić A. Aleksandra (2018)Mirković M. Miljana, Došen, M. Anja, Erić P. Suzana, Stojmenović D. Marija, Matović Z. Branko, Rosić A. Aleksandra. "Structural, Morphological and Electrical Properties of Multi-Doped Calcium Phosphate Materials as Solid Electrolytes for Intermediate Temperature Solid Oxide Fuel Cells" in Science of Sintering 50 no. 1, Beograd:International Institute for the Science of Sintering, Belgrade, Serbia (IISS) (2018): 95-109. https://doi.org/10.2298/SOS1801095M
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Structural, Morphological and Electrical Properties of Multi-Doped Calcium Phosphate Materials as Solid Electrolytes for Intermediate Temperature Solid Oxide Fuel Cells
Mirković Miljana M., Došen Anja M., Erić Suzana P., Stojmenović, Marija D., Matović Branko Z., Rosić Aleksandra A. (2018)Mirković Miljana M., Došen Anja M., Erić Suzana P., Stojmenović, Marija D., Matović Branko Z., Rosić Aleksandra A.. "Structural, Morphological and Electrical Properties of Multi-Doped Calcium Phosphate Materials as Solid Electrolytes for Intermediate Temperature Solid Oxide Fuel Cells" in Science of Sintering 1 no. 50, Beograd:Međunarodni Institut za nauku o sinterovanju (2018): 95-109. https://doi.org/https://doi.org/10.2298/SOS180
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Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources
Large collections of textual documents represent an example of big data that requires the solution of three basic problems: the representation of documents, the representation of information needs and the matching of the two representations. This paper outlines the introduction of document indexing as a possible solution to document representation. Documents within a large textual database developed for geological projects in the Republic of Serbia for many years were indexed using methods developed within digital humanities: bag-of-words and named ...... Suffix Division Faculty of Mining and Geology Organization University of Belgrade Address Belgrade, Serbia Email ivan.obradovic@rgf.bg.ac.rs Author Family Name Kitanović Particle Given Name Olivera Prefix Suffix Division Faculty of Mining and Geology Organization University of Belgrade Address ...
... primarily to establish an object- oriented database for digital archiving of geologic data in the field of general geology, exploration of mineral deposits, hydrogeology and engineering geology, as a modern and efficient information basis for planning, design and decision- making in the geological domain ...
... to the standard information retrieval performance measures, where the InQuery method performed the best. 1 Introduction Advancements in database technology provide nowadays for management of large quantities of heterogeneous data. However, besides this engineering challenge— efficient management of such ...Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović. "Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources" in Trans. Computational Collective Intelligence - Lecture Notes in Computer Science 26, Springer (2017). https://doi.org/10.1007/978-3-319-59268-8_8
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A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia
When assessing the potential of renewable energy alternatives for electricity generation, it is necessary to implement a multi-perspective approach that includes economic, technical, environmental, and socio-political criteria. For the evaluation of criteria and alternatives, the Fuzzy Analytical Hierarchy Process (FAHP) method is applied. The obtained weights are formed according to the values of energy indicators and expert judgments. The use of a fuzzy numerical value scale for the assessment of expert judgments and energy indicators provides a more sensitive ...... levels. Strantzali et al. (2017) used a multicriteria decision-making model to determine the optimal fuel mix for electricity genera- tion in an isolated Greek island, with respect to the economic, technical, environmental, and social aspects. Using the case of Lithuania’s electricity sector and multiple ...
... impact on the environment, it is important to evaluate RESs from a lifecycle perspective and to consider emissions in the fuel chain and the manufacturing of the energy conversion technology. Indicator ‘‘Lifecycle GHG emissions per unit of final energy delivered’’ (IPC, 2014), measured in kg of carbon dioxide ...
... facilities (reactors) formed from biomass by an anaerobic process. 3.2.1. Economic criterion (C1) The economic criterion of RESs refers to the cost of producing electricity from a particular RES. As an energy indicator that reflects economic criterion, here ‘‘The global weighted-average costs of electricity’’ ...Boban Pavlović, Dejan Ivezić, Marija Živković. "A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia" in Energy Reports, Elsevier BV (2021). https://doi.org/10.1016/j.egyr.2021.02.072
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Overcoming the Low Oral Bioavailability of Deuterated Pyrazoloquinolinone Ligand DK-I-60-3 by Nanonization: A Knowledge-Based Approach
Jelena R. Mitrović , Branka Divović-Matović, Daniel E. Knutson, Jelena B. Ðoković, Aleksandar Kremenović, Vladimir D. Dobričić, Danijela V. Randjelović, Ivana Pantelić, James M. Cook, Miroslav M. Savić, Snežana D. Savić (2021)Poor water solubility of new chemical entities is considered as one of the main obstacles in drug development, as it usually leads to low bioavailability after administration. To overcome these problems, the selection of the appropriate formulation technology needs to be based on the physicochemical properties of the drug and introduced in the early stages of drug research. One example of the new potential drug substance with poor solubility is DK-I-60-3, deuterated pyrazoloquinolinone, designed for the treatment of various neuropsychiatric ...... grant agreements no. 451-03-9/2021-14/200161 (Faculty of Pharmacy), 451-03-09/2021-14/200126 (Faculty of Mining and Geology), and 451-03-9/2021- 14/200026 (Institute of Chemistry, Technology and Metallurgy); National Institutes of Health, USA through grants R01 NS076517 and R01 MH096463 and National Science ...
... conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). 1 Department of Pharmaceutical Technology and Cosmetology, Faculty of Pharmacy, University of Belgrade, Vojvode Stepe 450, 11221 Belgrade, Serbia; jelena.mitrovic@pharmacy.bg.ac.rs (J.R ...
... Vojvode Stepe 450, 11221 Belgrade, Serbia; vladimir.dobricic@pharmacy.bg.ac.rs 6 Department of Microelectronic Technologies, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia; danijela@nanosys.ihtm.bg.ac.rs * Correspondence: snezana.savic@pharmacy ...Jelena R. Mitrović , Branka Divović-Matović, Daniel E. Knutson, Jelena B. Ðoković, Aleksandar Kremenović, Vladimir D. Dobričić, Danijela V. Randjelović, Ivana Pantelić, James M. Cook, Miroslav M. Savić, Snežana D. Savić. "Overcoming the Low Oral Bioavailability of Deuterated Pyrazoloquinolinone Ligand DK-I-60-3 by Nanonization: A Knowledge-Based Approach" in Pharmaceutics, MDPI, Basel, Switzerland (2021). https://doi.org/10.3390/pharmaceutics13081188
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An intelligent hybrid system for surface coal mine safety analysis
Nikola Lilić, Ivan Obradović, Aleksandar Cvjetić. "An intelligent hybrid system for surface coal mine safety analysis" in Engineering Applications of Artificial Intelligence (2010)
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Novi model za postizanje optimalne proizvodnje na naftnom polju Amal
Elnori Elmabrouk Ali Elhaddad (2015-04-16)Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...... optimization using an integrated asset model,” in SPE International Petroleum Technology Conference (IPTC '07), pp. 1371–1380, Dubai, UAE. Hallet D. (2002) History of Libyan oil exploration and production, Petroleum Geology of Libya, 17-47. Hallibarton, (2012), Filter construction. Hallibarton, ...
... crystals in waxy crude oils cooled in quiescent conditions and under flow, Fuel 82, 127–135. Kasumu A.S., Arumugam S., Mehrotra A.K. (2013 ) Effect of cooling rate on the wax precipitation temperature of ‘‘waxy’’ mixtures, Fuel, 103, 1144–1147. 91 King G.E., Wildt P.J., O'Connell E. (2003) Sand ...
... Harouge (2011), About Harouge Oil Operations, Harouge Oil Operations, www.vebalibya.com. Harvie C. (2013) Oil and economic development: Libya in the post-Gaddafi era, Economic Modelling, Volume 32, 273-285. Hatcher W.B., Chilingarian G.V., Solum J.R. (1989) Chapter 6 Gravel Packing, Developments ...Elnori Elmabrouk Ali Elhaddad. "Novi model za postizanje optimalne proizvodnje na naftnom polju Amal" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-04-16)
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Novi model za postizanje optimalne proizvodnje na naftnom polju Amal
Elnori Elmabrouk Ali Elhaddad (2015-04-16)Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...... optimization using an integrated asset model,” in SPE International Petroleum Technology Conference (IPTC '07), pp. 1371–1380, Dubai, UAE. Hallet D. (2002) History of Libyan oil exploration and production, Petroleum Geology of Libya, 17-47. Hallibarton, (2012), Filter construction. Hallibarton, ...
... crystals in waxy crude oils cooled in quiescent conditions and under flow, Fuel 82, 127–135. Kasumu A.S., Arumugam S., Mehrotra A.K. (2013 ) Effect of cooling rate on the wax precipitation temperature of ‘‘waxy’’ mixtures, Fuel, 103, 1144–1147. 91 King G.E., Wildt P.J., O'Connell E. (2003) Sand ...
... Harouge (2011), About Harouge Oil Operations, Harouge Oil Operations, www.vebalibya.com. Harvie C. (2013) Oil and economic development: Libya in the post-Gaddafi era, Economic Modelling, Volume 32, 273-285. Hatcher W.B., Chilingarian G.V., Solum J.R. (1989) Chapter 6 Gravel Packing, Developments ...Elnori Elmabrouk Ali Elhaddad. "Novi model za postizanje optimalne proizvodnje na naftnom polju Amal" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-04-16)
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Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata
... 4 Figure 2 depicts the class diagram IstrazniProstor, which models the exploration works (boreholes and observed lithology, interpretation of stratigraphy, results of performed analyses, as well as deposit contour). The central position in this diagram is taken by the class Busotine, defined geo ...
... to the selected borehole. These objects are used for entering interval trials with data on sample analyses, observed lithology and interpreted stratigraphy. Figure 7. Panels for manipulating alphanumeric data 7 CONCLUSION In the paper we outlined the development of a geodatabase for ...
... action. Geographic information systems (GIS) are precisely such a tool. They offer support for implementation of various types of projects aimed at economic development, resource management, and high quality decision making. GIS can also improve various everyday procedures by offering fast access to ...Aleksandra Tomašević, Ljiljana Kolonja, Ivan Obradović, Ranka Stanković, Olivera Kitanović. "Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata" in Podzemni radovi, Beograd : Univerzitet u Beogradu - Rudarsko-geološki fakultet (2012)
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Phase relations and physical indicators of municipal waste from old landfills in Serbia
Due to certain similarities of municipal waste and soil, usually for the determination of basic parameters of physical state, laboratory and field tests which are common in geotechnical investigations are used. It is often to construct an apparatus for special purpose to perform some specific laboratory and field tests. Therefore, different values of indicators of municipal waste physical state can be found in the literature. The basic reasons should be found in different definitions and methods that researchers use ...municipal waste, moisture content, unit weight, specific gravity, grain size distribution, porosityGeneral Computer Science... University of Belgrade, Faculty of Mining and Geology, Djusina 7, Belgrade11000, Serbia. 1i) Assistant, University of Belgrade, Faculty of Mining and Geology, Djusina 7, Belgrade 11000, Serbia iii) Ph.D Student, University of Belgrade, Faculty of Mining and Geology, Djusina 7, Belgrade 11000, Serbia. iv) ...
... G.A., Repetto P.C. (1994): Geotechnical Properties of Municipal Solid Waste and Their 110 Use in Landfill Design, PasteTech '94 - Landfil! Technology Conference, Charleston, South Carolina, USA, 1-32. 4) Gourc J.P., Staub M.J. (2010): The Biohydro-mechanical Behaviour of Municipal Solid Waste ...
... приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac ...Dragoslav R Rakić, Irena G Basarić Ikodinović, Jovana M Janković, Tina D Đurić. "Phase relations and physical indicators of municipal waste from old landfills in Serbia" in Japanese Geotechnical Society Special Publication, The Japanese Geotechnical Society (2021). https://doi.org/10.3208/jgssp.v09.cpeg016
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Keyword-Based Search on Bilingual Digital Libraries
This paper outlines the main features of Biblisha, a tool that offers various possibilities of enhancing queries submitted to large collections of aligned parallel text residing in bilingual digital library. Biblishsa supports keyword queries as an intuitive way of specifying information needs. The keyword queries initiated, in Serbian or English, can be expanded, both semantically, morphologically and in other language, using different supporting monolingual and bilingual resources. Terminological and lexical resources are of various types, such as wordnets, electronic ...Ranka Stanković, Cvetana Krstev, Duško Vitas, Nikola Vulović, Olivera Kitanović. "Keyword-Based Search on Bilingual Digital Libraries" in Semantic Keyword-Based Search on Structured Data Sources - Second COST Action IC1302 International KEYSTONE Conference, IKC 2016, Springer (2017). https://doi.org/10.1007/978-3-319-53640-8_10
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Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software
The development of modern technologies has enabled the application of specialized softwares in the field of mining through various segments and processes, including in works related to drilling and blasting. The application of specialized software for drilling and blasting with the use of modern technologies such as photogrammetry enabled more accurate data from the field for later processing. By processing data and creating a 3D model of the terrain for drilling and blasting works, it can obtain precise data, ...Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić. "Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software" in Podzemni radovi, Beograd : Rudarsko-geološki fakultet (2024)
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English for Geology Students. 2
Lidija Beko (2023)... Измењено: 2023-11-07 09:16:53 English for Geology Students. 2 Lidija Beko Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] English for Geology Students. 2 | Lidija Beko | | 2023 | | http://dr.rgf.bg.ac.rs/s/repo/item/0008242 Дигитални ...
... Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs Odd ViICl | SANSTILS AO 1049 » HOt TON Lidija Beko ENGLISH FOR GEOLOGY STUDENTS Lidija Beko ENGLESKI ...
... ... a d W · -kef Ag • ,,, 5v -P ON 2 . a SOMa. Geological Wonders.......... t Profession – Young Geotechnician................. Geology Mystery Files ... ı Geology through Myths........... . • Unit2 • METAMORPHIC ROCKS AND GEMSTONES CAUSES AND DEFINITION ... i ttt Mocabulany,..3. MOMN . BVIVA ...Lidija Beko. English for Geology Students. 2, Belgrade : The Faculty of Mining and Geology, 2023