Претрага
2350 items
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Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic
Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...... of multiatributive and multi-criteria analyses are used, as well as those based on statistical data processing from engineering practice and expert systems. The selection of artificial lift methods was initially performed by experts who consider all the parameters of the well and the reservoir, as ...
... of multiatributive and multi-criteria analyses are used, as well as those based on statistical data processing from engineering practice and expert systems. The selection of artificial lift methods was initially performed by experts who consider all the parameters of the well and the reservoir, as well ...
... fuzzy logic application. Optimization criteria are well utilization and service ability. Fuzzy logic has a great application, used in many engineering disciplines as a decision-making tool. In the field of petroleum engineering it is applied in several areas: Reservoir Porosity Estimation [2,3]; Oil ...Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković. "Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic" in Energies, MDPI AG (2020)
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Дигиталне библиотеке у рударству и геологији са посебним освртом на представљање сиве литературе
Имајући у виду потребу за проналажењем информација похрањених у различитим облицима документације која се генерише у областима рударства и геологије на Рударско-геолошком факултету Универзитета у Београду, отпочет је процес развоја дигиталне библиотеке ROmeka@RGF, на платформи за приказивање дигиталних колекција - Омека. Значајан део документације представља такозвана сива литература која је претежно заступљена у виду вишетомне документацијe. Први савладани изазов представљало је повезивање различитих вишетомних делова пројектних извештаја у једну целину која би била лако доступна и претражива.... language technology“. The Electronic Library Vol. 36 Issue: 6 (2018): 993-1009. Ћирковић, Сњежана. „Сива литература – камелеон информационих ресурса“. Инфо- тека Год. 18, бр. 1 (2018): 78-87. Biljana Lazić Aleksandra Tomašević Mihailo Škorić DIGITAL LIBRARIES IN MINING AND GEOLOGY WITH SPECIAL REFERENCE ...
... Library and Information Studies. Amsterdam: Walter de Gruyter, 2010. 1-9. Krstev, Cvetana, Ranka Stanković, Duško Vitas, Ivan Obradović. “The Usage of Various Lexical Resources and Tools to Improve the Performance of Web Search Engines”. Sixth International Conference on Language Resources and Evaluation ...
... of real-time and appropriate access to the project data. It is common that projects are stopped due to information lose in long-time period and unstable environment. The first challenge is to connect different multivolume parts in one consistent unit that is easily accessible and searchable. One ...Биљана Лазић, Александра Томашевић, Михаило Шкорић. "Дигиталне библиотеке у рударству и геологији са посебним освртом на представљање сиве литературе" in Научна конференција Библиоинфо — 55 година од покретања наставе библиотекарства на високошколском нивоу, Београд 18. мај 2017., Филолошки факултет Универзитета у Београду (2019). https://doi.org/10.18485/biblioinfo.2017.ch13
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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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Fuzzy expert analysis of the severity of mining machinery failure
Mining machinery failure is almost an everyday occurrence. Usually the failures bare certain consequences, which require additional financial costs to repair and restore the system to its operational state. The consequences are viewed through negative and damaging effects a failure has on the machine, health and safety of the employees, work environment, and on the environment. The removal of the consequences of the failure requires additional financial investment, which has a negative impact on the company’s business. In order ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy expert analysis of the severity of mining machinery failure" in Applied Soft Computing, Elsevier BV (2020). https://doi.org/10.1016/j.asoc.2020.106459
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Quality of water in storage reservoirs related to the catchments lithology
Nikić Zoran, Ristić Ratko, Srećković Batoćanin Danica, Ristović Ivica. "Quality of water in storage reservoirs related to the catchments lithology" in First Serbian Forestry Congress under slogan Future With Forests, Topic B: Ecological Engineering in Protection of Soil and Water Resources, Belgrade:University of Belgrade, Faculty of Forestry (2011): 1037-1043
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Compresibillity parameters of old municipal waste from two landfills in Serbia
Rakić Dragoslav, Čaki Laslo, Hadži-Niković Gordana, Basarić Irena. "Compresibillity parameters of old municipal waste from two landfills in Serbia" in Proceedings of the XVI European Conference of Soil Mechanics and Geotechnical Engineering- ECSMGE, Edinburgh, United Kingdom:ISSMGE, BGA (2015): 2741-2746. https://doi.org/i:10.1680/ecsmge.60678
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Legal framework for recultivation of degraded areas caused by mining exploitation
Radmila Gaćina (2023)Prilikom površinske i podzemne eksploatacije uglja eksploatacioni sistemi oštećuju veće ili manje površine zemljišta. Iskustva pokazuju da su oštećenja zemljišta znatno veća kod površinske eksploatacije, gde je prostora degradiran ne samo u konturi rudnika i okoline, već se promene takođe dešavaju u prirodnom okruženju. U članku su predstavljeni rezultati studije zakonskih okvira rekultivacije u nekim zemljama sveta i u Srbiji. Praktično iskustvo rekultivacije pokazalo je da iskorišćenje i devastacija tokom rudarske aktivnosti predstavljaju opasnost ne samo za pogođena ...... 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 'UNDERGROUND MINING ENGINEERING 42 (2023) 27-36 UDK 62 'UNIVERSITY OF BELGRADE - FACULTY OF MINING AND GEOLOGY ISSN 03542904 ...
... of preventing environmental damage and also for humans. Mineral and coal mining often increases soil density, erosion, sedimentation, landslides, disruption of flora and fauna, and disruption of public health, which leads to microclimate change (Goudie and Viles, 2013). The post-mining impacts ...
... development of organizational and economic infrastructure. AUSTRALIA In Australia, for example, individual states and territories are responsible for mining, rehabilitation, and mine closure, including the adoption of individual laws, regulations, and guidelines. Industry and government agencies have ...Radmila Gaćina. "Legal framework for recultivation of degraded areas caused by mining exploitation" in Underground mining engineering, Belgrade : University of Belgrade - Faculty of Mining and Geology (2023). https://doi.org/10.5937/podrad2342027G
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Modelling of coal seam of the deposit Đurđevik (BIH) by means of 2D reflective seismic
Arsenović Siniša, Urošević Milovan, Sretenović Branislav, Cvetkov Vesna, Životić Dragana. "Modelling of coal seam of the deposit Đurđevik (BIH) by means of 2D reflective seismic" in Journal of Geophysics and Engineering 13 no. 3, Bristol, UK:IOP Publishing (2016): 422-428. https://doi.org/10.1088/1742-2132/13/3/422
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Geotehnički uslovi izgradnje nadvožnjaka "Balajnac" na autoputu E-80 deonica: Niš - Merošina
Dragoslav Rakić, Nikola Božović (2024)U sklopu prve deonice autoputa E-80 Niš – Merošina, izgrađen je nadvožnjak u zoni sela Balajnac koji je oslonjen na tri stubna mesta na međusobnom rastojanju od oko 26 m. Svaki stub je fundiran na šipovima i to sa predloženim rasporedom od 2 šipa u grupi na međusobnom rastojanju od 3.6 m. U radu su na osnovu izvršenih geotehničkih istraživanja terena, analizirani rezultati nosivosti vertikalno opterećenog šipa prečnika 1.2 m i dužine šipa od L = 23 m. Analiza ...Dragoslav Rakić, Nikola Božović. "Geotehnički uslovi izgradnje nadvožnjaka "Balajnac" na autoputu E-80 deonica: Niš - Merošina" in Peti Srpski kongres o putevima, Beograd, 30-31.05.2024., Beograd : Srpsko društvo za puteve "Via Vita" (2024)
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Machine Learning and Deep Neural Network-Based Lemmatization and Morphosyntactic Tagging for Serbian
The training of new tagger models for Serbian is primarily motivated by the enhancement of the existing tagset with the grammatical category of a gender. The harmonization of resources that were manually annotated within different projects over a long period of time was an important task, enabled by the development of tools that support partial automation. The supporting tools take into account different taggers and tagsets. This paper focuses on TreeTagger and spaCy taggers, and the annotation schema alignment ...... Automata, Texts and Electronic Dictionaries. University of Bel- grade, Faculty of Philology, Belgrade. Ljubešić, N., Klubička, F., Agić, Ž., and Jazbec, I.- P. (2016). New inflectional lexicons and training cor- pora for improved morphosyntactic annotation of Croa- tian and Serbian. In Proceedings ...
... Krstev, C., Lazić, B., and Škorić, M. (2018). Electronic dictionaries–from file system to lemon based lexical database. In Proceedings of LREC, pages 18– W23. Tufiş, D., Koeva, S., Erjavec, T., Gavrilidou, M., and Krstev, C. (2009). Building language resources and translation models for machine ...
... rule could be formulated and used. Our aim to include gram- matical categories of comparative degree (for adjectives) and gender (for nouns, adjectives, some forms of verbs and some types of pronouns and numbers) into tagger models required an update of the training corpus and addition of re- spective ...Ranka Stanković, Branislava Šandrih, Cvetana Krstev, Miloš Utvić, Mihailo Škorić. "Machine Learning and Deep Neural Network-Based Lemmatization and Morphosyntactic Tagging for Serbian" in Proceedings of the 12th Language Resources and Evaluation Conference, May Year: 2020, Marseille, France, European Language Resources Association (2020)
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Mesozoic carbonate rocks in Serbia used as dimension stone
Vesna Matović, Tijana Vojnović Ćalić (2016)The building industry in Serbia uses, to a great extent, imported natural stone for architectural purposes. The significance of local deposits, particularly limestones, is not adequately perceived despite the country’s abundance of these valuable resources. Therefore, this study focuses on Serbia’s Mesozoic carbonate rocks, specifically on the deposits of four selected quarries: Klisura, Skrzut, Struganik, and Tisnica. The quality and prospects of the application of these limestones has not yet been the subject of a detailed, comprehensive investigation. Therefore, ...... is the most important building material in civil engineering; it is used in the architecture of old cities or modern buildings, in monument heritage sites, and in the memorial industry. With regard to its aesthetic properties, workability, and durability, stone is a favourite material of sculptors ...
... in Serbia, where limestones were traditionally quarried as dimension stone. The widespread, satisfactory engineering properties confirmed in praxis, and cost-effective exploitation and processing of limestones has resulted in active quarries of dimension stone being opened primarily in the ...
... Универзитета у Београду [ДР РГФ] Mesozoic carbonate rocks in Serbia used as dimension stone | Vesna Matović, Tijana Vojnović Ćalić | Bulletin of Engineering Geology and the Environment | 2016 | | 10.1007/s10064-015-0722-0 http://dr.rgf.bg.ac.rs/s/repo/item/0008250 Дигитални репозиторијум Рударско-геолошког ...Vesna Matović, Tijana Vojnović Ćalić. "Mesozoic carbonate rocks in Serbia used as dimension stone" in Bulletin of Engineering Geology and the Environment, Springer Science and Business Media LLC (2016). https://doi.org/10.1007/s10064-015-0722-0
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Laboratory testing of fly ash
Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction... of Civil Engineering and Geodesy, Trg Dositeja Obradovica 6, 21000 Novi Sad, Republic of Serbia Tel. +381 65 440 59 00 E-mail: radovicn@drenik.net Milinko Vasić, PhD, Geo. Eng., Full Professor University of Novi Sad, Faculty of Technical Sciences, Department of Civil Engineering and Geodesy, ...
... N.; Radonjanin, V.; Malešev, M. Use of fly ash for embankment construction in road construction with and without binders. // Proceedings of the 5th Int. conference Civil Engineering - Science and Practice / Žabljak, 2014, pp. 1133-1138. Authors’ addresses Miloš Šešlija, MSc, BSc, Civ. ...
... Sciences, Department of Civil Engineering and Geodesy, Trg Dositeja Obradovica 6, 21000 Novi Sad, Republic of Serbia Tel. +381 65 399 00 89 E-mail: slavijasrb@gmail.com Aleksandra Rosić, PhD, Geo. Eng., Assistant Professor University of Belgrade, Faculty of Mining and Geology Đušina 7, 11000 Belgrade ...Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić. "Laboratory testing of fly ash" in Tehnički vijesnik (2016). https://doi.org/10.17559/TV-20150317171035
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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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Моделирање утицаја одступања линије најмањех отпора од пројектоване на интензитет потреса од минирања
Стефан Милановић (2024)Према дефиницији линија најмањег отпора представља најкраће растојање од центра минског пуњења до слободне површине. Oвим истраживањем представљен је утицај линије најмањег отпора, као и њеног одступања од пројектоване на интезитет потреса услед минирања. Проблем линије најмањег отпора је веома заступљен у пракси, где се занемарује изглед слободне површине, који може бити врло неправилан. Линију најмањег отпора је потребно мерити целом дужином минске бушотине према слободној површини, иако је у пракси случај да се мери најчешће као растојање од ...линија најмањег отпора, 3D модел, потреси услед минирања, минирање, слободна површина, метода раздвојених елеменатаСтефан Милановић. Моделирање утицаја одступања линије најмањех отпора од пројектоване на интензитет потреса од минирања, Београд : [С. Милановић], 2024
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Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs
John Nyame (2024)The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...... opportunities for CCU and CCS options as main sources of captured CO-. In June 2022, 1PointFive and Carbon Engineering announced plans to deploy over 70 large scale plants by 2035 (each with a capture capacity of up to 1 million tons per year) under current policy and voluntary and compliance market ...
... first two terms represent the exergy entering and leaving the system with a certain flow rate (n'). The third term is the net power obtainable from the heat transfer (Q'i), and the final term is the net power supplied to the system (-W-j) due to electrical power supplied. Finally, the exergy efficiency ...
... regional industries, leading infrastructure and logistics operators, global engineering firms, and academic institutions in a plan to decarbonize the UK's largest industrial region. This will be enabled by shared trans-regional pipelines for low-carbon hydrogen and captured carbon emissions, creating ...John Nyame. Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs, 2024
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The influence of rainfall factors on soil resistance to erosion
Nikola Živanović, Vukašin Rončević, Carla Ferreira, Milica Kašanin-Grubin, Stevan Ćorluka, Veljko Rupar, Vladimir Čebašek (2024)Nikola Živanović, Vukašin Rončević, Carla Ferreira, Milica Kašanin-Grubin, Stevan Ćorluka, Veljko Rupar, Vladimir Čebašek. "The influence of rainfall factors on soil resistance to erosion" in EGU General Assembly 2024, Vienna, Austria, Apr 14–19, 2024, Copernicus GmbH (2024). https://doi.org/10.5194/egusphere-egu24-1137
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An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System
In this paper we describe the approach that has been used in the development of the Management Information System (MIS) in the Coal Mine Pljevlja in Montenegro. The methodology of this approach was based on new information technologies and management techniques which have already been successfully applied in other related fields. Its main goal was to introduce modern management techniques to mining, adapted to specific features of the mining industry, its operations and environment, thus enabling the tactical management ...... mechanical, electrical, organizational and meteorological, and the place of occurrence is also recorded. 2.4 Monitoring of equipment maintenance The system for equipment maintenance represents information support for the tasks of technological- technical preparation of maintenance and keeps records ...
... define and keep updated the basic technical characteristics of all maintenance subjects. Considering technical complexity of this program system, it is located in the places where maintenance is being carried out, i.e. technical preparation services of the pits’ mechanical and electrical maintenance ...
... framework of electronic business (e-business) opens up the possibilities for the Mine to integrate its systems with IT solutions of third parties - business partners and clients, in a single business chain through Internet. Furthermore, e-business contributes to competitiveness, cost reduction and facilitates ...Božo Kolonja, Ranka Stanković, Filip Vuković, Ivan Obradović. "An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System" in Proceedings of the Fifteenth International Symposium on Mine Planning and Equipment Selection, Torino, Italy, September 2006, Vol. 1,, Balkema (2006)
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Available technological procedures for capturing CO2 in the industrial and power generation sectors
Climate change is a major environmental issue caused by anthropogenic emissions of greenhouse gases. Capturing CO2 and storing it in suitable geological formations is one of the main technological solutions that can provide mitigation of CO2 emission into the atmosphere. Capturing CO2 represents the first phase in process of carbon capture and storage, and includes the application of various technologies for the separation of CO2 produced in the energy and industrial sectors. There are four main systems for capturing ...... OF RESEARCH TECHNOLOGY AND ENGINEERING 2020, 1 (4), 8-20. 24. Ben-Mansour, R.; Habib, M.A.; Bamidele, O.E.; Basha, M.; Qasem, N.A.A. Peedikakkal, A.l Laoui, T.; & Ali, M. Carbon capture by physical adsorption: Materials, experimental investigations and numerical modeling and simulations – A review ...
... ; & Kumar, S.G. A REVIEW OF PRE- COMBUSTION CO2 CAPTURE IN IGCC. International Journal of Research in Engineering and Technology 2013, 2 (5), 847-853. 15. CCS Browser. A guide to CO2 Capture and Storage. Available online: https://www.ccsbrowser.com/# (accessed on 05 August 2021). 16. NETL. Available ...
... Post-combustion CO2 Capture with Chemical Absorption: A State-of-the-art Review. Chemical Engineering Research and Design 2011, 89 (9), 1609-1624. 26. Webley, P.A. Adsorption technology for CO2 separation and capture: a perspective. Adsorption 2014, 20, 225–231, doi: 10.1007/s10450-014-9603-2. ...Lola Tomić, Vesna Karović Maričić, Dušan Danilović, Branko Leković, Miroslav Crnogorac. "Available technological procedures for capturing CO2 in the industrial and power generation sectors" in 8th International Conference Mining and Environmental Protection, 22 – 25th September 2021, Serbia, Univerzitet u Beogradu, Rudarsko-geološki fakultet (2021)
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Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines
The conditions under which contemporary surface mining operations is carried out obviously becoming increasingly complex. In such complex conditions, the optimization of haulage systems as the technological phase with the largest share in the total operating costs, is very important from the aspect of achieving profitability of the mining project. In a large number of cases, the application of traditional haulage systems with trucks (as the most dominant type of haulage in open pit mines) does not lead to ...Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković. "Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines" in 8th International Conference MIining And Environmental Protection, Sokobanja, 22-25 September 2021, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2021)
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Određivanje zbijenosti starog komunalnog otpada
Bez obzira na savremene tretmane komunalnog otpada u svetu, u Srbiji je i dalje najčešći vid odlaganja na komunalne deponije, pa zbijanje otpada predstavlja jednu od ključnih faza formiranja deponije. Na ovaj način znatno se smanjuje zapremina otpada, ubrzava proces degradacije i produžava radni vek deponije. Zbog toga su geotehničke karakteristike komunalnog otpada prilikom zbijanja, veoma bitne kako u fazi projektovanja tako i u fazi izgradnje deponije i optimizacije prostora. Tu se pre svega misli na maksimalnu suvu zapreminsku ...Jovana Janković, Dragoslav Rakić, Irena Basarić Ikodinović, Tina Đurić. "Određivanje zbijenosti starog komunalnog otpada" in Konferencija Otpadne vode, komunalni čvrsti otpad i opasan otpad, 16-18.06.2021., Beograd : Udruženje za tehnologiju vode i sanitarno inženjerstvo (2021)