Претрага
497 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 ...... min{μR j = 1, …, 5, μM j = 1, …, 5, μS j = 1, …, 5}, for all o = 1 to O (4) - Outcomes are grouped according to their values Ωc, namely the size of j. - Find the MAXimum between previously identified minimums for each group of outcomes. The maximum which corresponding the jth value is calculated ...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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Flotability of chalcopyrite from the Rudnik deposit
Директно селективно флотирање олова, бакра и цинка у флотацији рудника „Рудник” датира од 1984. године. Технолошка шема омогућава директно издвајање селективних концентрата у три циклуса. У првом циклусу се издваја минерал олова (галенит), док су минерал бакра (халкопирит) и минерал цинка (марматит) депримирани. У другом циклусу се оток концентрације минерала олова кондиционира и припрема за издвајање минерала бакра. Након кондиционирања, у овом циклусу се издваја минерал бакра. У трећем циклусу се оток концентрације минерала бакра кондиционира и припрема за ...Đurica Nikšić, Predrag Lazić, Milena Kostović. "Flotability of chalcopyrite from the Rudnik deposit" in Journal of Mining Science, Springer Verlag (2021). https://doi.org/10.1134/S1062739121030170
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Praktikum za vežbe iz Informatike 1
Ranka Stanković, Ivan Obradović, Olivera Kitanović, Mirjana Banković. Praktikum za vežbe iz Informatike 1, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, 2014
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Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes
... generations without compromising the ability of future generations to meet their needs. Brundtland definition of sustainable development implies equal distribution of resources, not only spatially between users in a certain period, but also temporally between different generations of users over time. The idea ...
... level of nitrogen oxide emissions, while thermal power plant “Kostolac B” was in fifth place in 2012 and 2013 and in third place in 2014. Spatial distribution of emissions of pollutants is determined according to the level of emissions, in metric tons per annum. Emission values are classified into six ...
... have the fifth level of emissions of sulfur oxides (from 50,000 to 100,000 t/year) and nitrogen (from 5000 to 10,000 t/year). Based on the spatial distribution of the particulate emissions, it is concluded that thermal power plants “Kostolac A” and “Kostolac B” are in an area with the fifth level of pollution ...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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The Importance of Detailed Groundwater Monitoring for Underground Structure in Karst (Case Study: HPP Pirot, Southeastern Serbia)
... were particularly pronounced. The analysis of the total water losses from the tunnel showed that they were relatively acceptable and that their distribution along the tunnel was not uniform. The closer assessment of the zone with the highest water losses pointed to the part of the tunnel where the concrete ...Marina Čokorilo Ilić, Ana Mladenović, Marina Ćuk, Igor Jemcov. "The Importance of Detailed Groundwater Monitoring for Underground Structure in Karst (Case Study: HPP Pirot, Southeastern Serbia)" in Water, MDPI AG (2019). https://doi.org/10.3390/w11030603
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Primena AHP и WoEmetode u proceni podložnosti terena na kliženje za područje opštine Krupanj
Biljana Abolmasov, Jelka Krušić, Katarina Andrejev, Miloš Marjanović, Ranka Stanković, Uroš Đurić (2017)... but WoE has slightly better va- lidation parameters. These results are a solid background for general overview of the landslide susceptibility distribution at municipality scale, and can be successfully used for further landsli- de risk assessment or large scale planning. Key words: landslides, AHP ...Biljana Abolmasov, Jelka Krušić, Katarina Andrejev, Miloš Marjanović, Ranka Stanković, Uroš Đurić . "Primena AHP и WoEmetode u proceni podložnosti terena na kliženje za područje opštine Krupanj" in Izgradnja, Beograd : Udruženje inženjera građevinarstva, geotehnike, arhitekture i urbanista Izgradnja (2017): 239-246
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Advantages and Disadvantages of a Parallel and Zigzag Method of Acquisition in Walking Mode in Magnetometric Archeological Research
магнетометријска испитивања, цик-цак и паралелна аквизиција у ходајућем моду, линеарне аномалије, археологија... this error can result in the complete fl ecking of the anomalies, such as in this case. Expecting that the GPS error will lead to such a spatial distribution of the measured points, be- fore and after the completion of the measurements with GPS, the geographic coordinates of the cor- ner points of the ...Mirko Petković, Vesna Cvetkov, Branislav Sretenović. "Advantages and Disadvantages of a Parallel and Zigzag Method of Acquisition in Walking Mode in Magnetometric Archeological Research" in Arheologija i prirodne nauke (2014)
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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 ...... Electric Power Industry of Serbia (EPS) is the largest energy company in Serbia. The main activities of EPS are electricity generation, supply, distribution, and trading. Electricity generation in Serbia relies on lignite for around 70% of its electricity production. (EPS, 2018). EPS operates with 6 ...
... Parous- sos, 2018). 4. Local biodiversity (SC4) - negative impacts on biodiver- sity from renewable energy projects, as well as energy transport and distribution system (Moreira, 2019). Using the predetermined linguistic variables experts performed a pairwisecomparison of RESs with respect to the chosen ...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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Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia
Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeFen Huang, Ljiljana Vasic, Xia Wu, Jianhua Cao, Saša Milanovic. "Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia" in Environmental Earth Sciences, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s12665-019-8452-4
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Петрологија црвених пешчара источне Србијe
Андреј Марковић (2024)У источној Србији формација црвених пешчара има велико распрострањење и улази у састав многих планина овог дела наше земље. Формацију чине кластичне стене интензивно црвене боје псамитске, ређе псамитско-псефитске структуре и алевритске структуре. Ове стене леже трансгресивно преко старијих пермо-карбонских и карбонских стена, док навише прелазе у доњотријаске седименте. Формација црвених пешчара захвата два појаса унутар Карпато-балканида – унутрашњи и средишњи део. Узорци анализирани у овом раду део су средишњег појаса. Тема завршног рада је петрологија црвених пешчара источне ...... analyzed sandstones are defined as siltstone sandstones-arkoses. They are built of quartz, feldspar, rock fragments, micas and binders. According to size, degree of roundness and sorting, they are determined as fine-grained medium-sorted sandstones-siltstone- psammitic structure. The binder is calcite ...Андреј Марковић. Петрологија црвених пешчара источне Србијe, 2024
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Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду
... stability in unsatureated overconsolidated clayey soil. 9th Congress IAEG – Durban South Africa. HADŽI-NIKOVIĆ G., 2009: The influence of the grain-size distribution and soil structure on the unsaturated shear strength of loess sediments in Belgrade, central Serbia. Geološki anali Balkanskoga poluostrva ...
... , 2012: Exchange-Bias and Grain-Surface Relaxations in Nano- structured NiO/Ni Induced by a Particle Size Reduction. Journal of Physical Chemistry, C 116 (7), 4356–4364. JOVIĆ N., PREKAJSKI M., KREMENOVIĆ A., JANČAR B., KAHLENBERG V., ANTIĆ B., 2012: Influence of size/crystallinity effects on the ...
... anatase/rutile size-strain modelling. Journal of Applied Cry- stallography, 46, 1874–1876. VUCINIC-VASIC M., BOZIN E.S., BESSAIS L., STOJANOVIC G., KOZMIDIS-LUBURIC U., ABEYKOON M., JANCAR B., MEDEN A., KREMENOVIC A., ANTIC B., 2013: Thermal Evolution of Cation Distribution/Crystallite Size and their ...главни и одговорни уредник Душан Поломчић. Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2016
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Integrated Stratigraphy of the Middle–Upper Jurassic of the Krížna Nappe, Tatra Mountains
carbon and oxygen isotopes, radiolarians, calcareous dinoflagellates, radiolarites, Krížna Nappe, West ern Carpathians, Tethys... the zonal marker for the stratigraphically higher Fortis Zone (Reh4- nek, 1992). But, in order to accept and make a correction to this cyst distribution and also a possible zonal scheme in the future, additional information is needed. Despite the fact that one cyst resembles Carpistomio- sphaera ...
... zones)-Early Tithonian age (Pulla— Malmica zones; Grabowski and Pszczotkowski, 2006; Jach et al., 2012; Grabowski ef al., 2013). Regional distribution and age of radiolarites The data presented above on the basis of integrated bio- stratigraphy and isotope stratigraphy permit the sedimenta- ...
... from the Manin Unit (Butkov Klippe, Middle Vah valley, Western Carpathians). Mineralia Slovaca, 31: 79-86. RehakovaA, D., 2000. Evolution and distribution of the Late Juras- sic and Early Cretaceous calcareous dinoflagellates recorded in the Western Carpathian pelagic carbonate facies. Minerafia ...Renata Jach, Nevenka Đerić, Špela Goričan, Daniela Reháková. "Integrated Stratigraphy of the Middle–Upper Jurassic of the Krížna Nappe, Tatra Mountains" in Annales Societatis Geologorum Poloniae (2014)
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Mineral and Thermal Waters of Serbia: Multivariate Statistical Approach to Hydrochemical Characterization
Maja Todorović, Jana Štrbački, Marina Ćuk, Jakov Andrijašević, Jovana Šišović, Petar Papić . "Mineral and Thermal Waters of Serbia: Multivariate Statistical Approach to Hydrochemical Characterization" in Mineral and Thermal Waters of Southeastern Europe, Springer International Publishing (2016). https://doi.org/10.1007/978-3-319-25379-4
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Simulation of Hydrogeological Environmental Discharge in Case of Interruption Constant Observations
Marina Čokorilo Ilić, Dragoljub Bajić, Miroslav Popović. "Simulation of Hydrogeological Environmental Discharge in Case of Interruption Constant Observations" in International Scientific Conference - Sinteza 2024, Belgrade, 16. maj 2024, Singidunum University (2024). https://doi.org/10.15308/Sinteza-2024-288-294
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Отпад из процеса сагоревања угља као сировина за добијање елемената ретких земаља
Бојан Земљак (2024)Због великог броја индустрија у којима се користе ови ресурси, глобална економија се у великој мери ослања на елементе ретких земаља. Елементи ретких земаља су есенцијална сировина — материјал за развој савремених технологија, али у односу на њихову огромну потражњу, њихово вађење је ограничено и повезано је са значајним утицајима на животну средину. Због њихове ограничене доступности, проблема који се јављају при процесима експлоатације, све више и више земаља почиње да тражи повољније могућности вађења елемената [REE] из секундарних ...... from blast furnace slag using acid baking-water leaching. RSC advances, 10 (53), p.31936-31946. [171] Seleka, B.V., 2021. The effect of particle size separation on the enrichment and recovery of rare earth elements from South African coal fly ash. [172] Kashiwakura, S., Kumagai, Y., Kubo, H. and ...
... Rohitha, S., Premasiri, R., Abeysinghe, B., Ratnayake, N. and Dissanayake, K., 2020. The story of rare earth elements (REEs): Occurrences, global distribution, genesis, geology, mineralogy and global production. Ore Geology Reviews, 122, p.103521. [4] Fernandez, V., 2017. Rare-earth elements market: ...
... resources, and challenges for resourcing future generations. Nafura/ Resources Research, 27, p.201-216. [9] Kursun Unver, I. and Terzi, M., 2018. Distribution of trace elements in coal and coal fly ash and their recovery with mineral processing practices: A review. Joural of Mining and Environment ...Бојан Земљак. Отпад из процеса сагоревања угља као сировина за добијање елемената ретких земаља, 2024
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Multiple-Criteria Decision-Making in Mine Development Planning
Sanja Bajić (2023)The Borska Reka ore deposit is an experimental location where developed methodologies have been applied. It is the largest ore body within the Bor mining complex, which has been the subject of numerous studies and analyses for more than three decades. The paper focuses on the application of FAHP and the VIKOR method to address ranking of alternatives and select the optimal mining method by means of fuzzy multicriteria optimization.Sanja Bajić. "Multiple-Criteria Decision-Making in Mine Development Planning" in Proceedings of the 5th International Underground Excavations Symposium, 5-6-7 June 2023, Istanbul, Topkapi : Dinç Ofset Mat. Rek. San. ve Tic. Ltd. Şti. (2023)
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Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides
Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga (2022)oroklini, raspodela deformacija, transkurentna kretanja, Karpato-balkanidi, Cirkum-mezijski rasedni sistem... Origin of sediments during Cretaceous continent- continent collision in the Romanian South Carpathians: preliminary constraints from 40Ar/39Ar single-grain dating of detrital white mica. Geol. Carpath. 56 (5), 375–382. Neubauer, F., Fritz, H., Genser, J., Kurz, W., Nemes, F., Wallbrecher, E., Wang, X ...
... fault-slip measurements are taken along faults that do not have large offsets (i.e., kilometres to tens of kilometres) that are comparable with the fault size (e.g., Twiss and Unruh, 1998), which contrasts with the measured kinematics along faults that have offsets reaching tens of kilometres. Kinematic ...
... lines, showing the situation before (blue) and after (green) the deformation. Black arrows show displacement variability due to the slab pull. Arrows' size indicates a relative difference in displacement magnitude. Note the increase in dis- placements westwards and northwards, created by slab pull. Grey ...Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga. "Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides" in Global and Planetary Change, Elsevier BV (2022). https://doi.org/10.1016/j.gloplacha.2021.103714
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Resource-based WordNet Augmentation and Enrichment
In this paper we present an approach to support production of synsets for SerbianWordNet(SerWN)byadjustingPrincetonWordNet(PWN)synsetsusing several bilingual English-Serbian resources. PWN synset definitions were automatically translated and post-edited, if needed, while candidate literals for Serbian synsets were obtained automatically from a list of translational equivalents compiled form bilingual resources. Preliminary results obtained from a setof1248selectedPWNsynsetsshowthattheproducedSerbiansynsetscontain 4024 literals, out of which 2278 were offered by the system we present in this paper, whereas experts added the remaining 1746. Approximately one half of ...... number of literals was found in the remaining 507 (3%) synsets. For the 11,091 synsets with same number of literals in English and Serbian the distribution according to the number of literals was as follows: there were 7063 (64%) synsets with one literal, 3288 (30%) with two, 561 (5%) with tree, and ...Ranka Stanković, Miljana Mladenović, Ivan Obradović, Marko Vitas, Cvetana Krstev. "Resource-based WordNet Augmentation and Enrichment" in Proceedings of the Third International Conference Computational Linguistics in Bulgaria (CLIB 2018), May 27-29, 2018, Sofia, Bulgaria, Sofia : The Institute for Bulgarian Language Prof. Lyubomir Andreychin, Bulgarian Academy of Sciences (2018)
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Integrative GHG Assessment in Oil and Gas Industry
Reducing greenhouse gas emissions is one of the main targets of national strategies in European countries. As a main contributor to emissions, the energy sector is recognized as the most promising to apply measures and actions aimed to decrease GHG emissions. The Oil and Gas industry as a significant contributor to global greenhouse gas emissions is facing a growing need for estimating, mitigating, and reducing the impact of their operations on the atmosphere to stay competitive in a newly ...... n and exploitation of energy sources, conversion of primary cnergy sources into usable forms in refineries and power plants, transmission and distribution of fucls, and the use of fuels in stationary and mobile applications. These activities result in emissions of carbon dioxide (CO») from the ...Aleksandar Mirković, Marija Živković, Stevan Đenadić, Darja Lubarda, Chinedu Anyanwa. "Integrative GHG Assessment in Oil and Gas Industry" in Energija, ekonomija, ekologija (2023). https://doi.org/10.46793/EEE23-1.51M
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Underground loading-haulage equipment selection with application of topsis method with different weighting methods of criteria
The choice of adequate mining machines is one of the most complex problems in the underground exploitation of mineral raw materials. The weight of such a decision is reflected in the high prices of these machines and the occurrence of even greater costs during their use if their choice was wrongly conceived. There are numerous examples from practice in which such decisions were made solely on the basis of comparing the prices of machines, without considering any of the ...utovarno-transportna mehanizacija, izbor, TOPSIS, entropija, standardna devijacija, težina kriterijumaVladimir Krivošić, Luka Crnogorac, Rade Tokalić. "Underground loading-haulage equipment selection with application of topsis method with different weighting methods of criteria" in Underground mining engineering, University of Belgrade - Faculty of Mining and Geology (2024)