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846 items
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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 ...... reference groups of bucket-wheel excavators, i.e. old and new. Two MCDM methods synthesized in a hybrid model were used. Work has a double effect. The first is certainly the presentation of the evaluation model while the second is in the results obtained. The paper presents the possibility of applying such ...
... selecting of the optimal block size for the needs of the coal deposit modeling process and mine planning can be done with the AHP method [12]. The hybrid model based on the AHP method is used for the sustainable chain of electricity supply, for 7 European countries whose participation of 86.8% of the total ...
... la Realité (ELimination and Choice Expressing REality) [19], Bernard Roy. The paper uses two MCDM methods, AHP and TOPSIS. The first part of the model uses the AHP method to rank the parameters, while the second part uses the TOPSIS method. The basic setting of the data method is respectively. ...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 impact of limestone fragmentation on raw mix production in cement industry
Raw mix design is one of crucial point in production of clinker. Cement industry use limestone, marl, clay in particular percent to provide the best quality in production of clinker. The quality of the material must be in line with the quality targets. Fragmentation is important element, because affect preblending design, economic norm from blasting to crusher. Blasting is an operation which affects all subsequent operations and costs. The Kuz-Ram model is possibly the most widely used approach to ...Nikola Đokić, Lazar Kričak, Stefan Milanović, Marinko Pavlović, Stefan Krstić. "The impact of limestone fragmentation on raw mix production in cement industry" in Proceedings / XIV International Mineral Processing and Recycling Conference, IMPRC; May 12-14, 2021, Belgrade : University of Belgrade, Technical Faculty in Bor (2021)
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Building Terminological Resources in an e-Learning Environment
Ranka Stanković, Ivan Obradović, Olivera Kitanović, Ljiljana Kolonja. "Building Terminological Resources in an e-Learning Environment" in Proceedings of the Third International Conference on e-Learning, eLearning-2012, September 2012, Belgrade, Serbia, Belgrade : Belgrade Metropolitan University (2012)
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Оптимизација управљања процесима рекултивације површинских копова угља
Bojan S. Dimitrijević (2014-05-30)Ширење површинске експлоатације минералних сировина а нарочито енергетских ресурсафосилних горива, чине површинске копове угља просторно доминантним објектима великих рударскихбасена како у нас тако и у свету. Експлоатациона активност, прати негативне еколошке утицаје наживотну средину шире околине, што нас обавезује на интегрално планирање, ревитализацију,рекултивацију и уређење нарушеног простора за његово поновно хумано коришћење упостексплоатационом периоду. Постексплоатационо санирање и уређење предела површинских коповаи одлагалишта односно нарушеног простора изазваног рударским радовима и пратећих објеката,представља синтетички мултидисциплинарно-интердисциплинаран веома комплексан вишефазниинжењерски пројектни задатак.У уводном ...рекултивација, постексплоатациони предео, површински коп угља,вишеатрибутна анализа, одлучивање, процеси, рекултивационо решењеBojan S. Dimitrijević. "Оптимизација управљања процесима рекултивације површинских копова угља" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2014-05-30)
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Numerical modelling of a single intra-oceanic subduction for the origin of the Balkan ophiolites
Nikola Stanković, Vesna Cvetkov, Vladica Cvetković. "Numerical modelling of a single intra-oceanic subduction for the origin of the Balkan ophiolites" in 5th Congress Geologists of the Republic of North Macedonia, Ohrid, 28-29. 10. 2024, Македонско геолошко друштво (2024)
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Modeliranje buke u urbanoj sredini u okolini Doma zdravlja u Pančevu
Stefan Mandić (2024)Prisustvujemo epohi gde buka predstavlja veoma rasprostranjen i moderan fenomen koji možemo deklarisati kao problem. Svedoci smo toga da moderni problemi zahtevaju malo drugačiji pristup nego u prošlosti, odnosno zahtevaju moderna rešenja. Samim tim, vremenom je došlo do modernizacije alata,u ovom slučaju došlo je do razvoja modela za rasprostiranje buke koji su se vremenom unapređivali pa tako danas imamo jedno moćno sredstvo za borbu protiv buke u vidu kompjuterskog softvera.Ovaј master rad, pod nazivom „Modeliranje buke u urbanoj sredini ...... da pažljivo uporedimo rezultate sa terena i one dobijenih putem modela. Sve to u cilju pronalaska efikasnog rešenja za smanjenje uticaja buke. Ovim master radom obuhvaćeni su svi potrebni koraci za uspešnu izradu kompjuterskog modela za potrebe modeliranja rasprostiranja buke u urabnim sredinama ...
... results from the field and those obtained through the model. AlI this in order to find an effective solution to reduce the impact of noise. This master's thesis covers all the necessary steps for the successful creation of a computer model for the purposes of modeling noise propagation in industrial ...
... Beogradu Modeliranje rasprostranjenosti buke u urbanoj sredini u okolini Doma zdravlja „Pančevo“ 8 RAZVOJ MODELA ZA MAPIRANJE BUKE Za problem kao što Je buka, razvijeni su modeli koji nam omogućuju da predvidimo uticaj buke. Za modeliranje uticaja buke u okolini „Doma zdravlja Pančevo“ , ...Stefan Mandić. Modeliranje buke u urbanoj sredini u okolini Doma zdravlja u Pančevu, 2024
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Towards Sustainable Management of Transboundary Hungarian-Serbian Aquifer
Zoran Stevanović, Peter Kozák, Milojko Lazić, Janos Szanyi, Dušan Polomčić, Balazs Kovács, Jozsef Török, Saša Milanović, Bojan Hajdin, Petar Papić (2011)Zoran Stevanović, Peter Kozák, Milojko Lazić, Janos Szanyi, Dušan Polomčić, Balazs Kovács, Jozsef Török, Saša Milanović, Bojan Hajdin, Petar Papić. "Towards Sustainable Management of Transboundary Hungarian-Serbian Aquifer" in Transboundary Water Resources Management - A Multidisciplinary Approach, Weinheim, Germany : Wiley-VCH (2011): 143-149
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Оцена перспективности изворишта "Вић баре" за водоснабдевање Обреновца
Бојан Хајдин, Душан Поломчић, Зоран Стевановић, Драгољуб Бајић, Катарина Хајдин. "Оцена перспективности изворишта "Вић баре" за водоснабдевање Обреновца" in XIV Српски симпозијум о хидрогеологији са међународним учешћем, Рударско-геолошки факултет, Београд (2012)
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Развој геолошког терминолошког речника ГеолИССТерм
Ranka Stanković, Branislav Trivić, Olivera Kitanović, Branislav Blagojević, Velizar Nikolić. "Развој геолошког терминолошког речника ГеолИССТерм" in INFOteka: časopis za informatiku i bibliotekarstvo, Beograd : Zajednica biblioteka univerziteta u Srbiji (2011)
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Depth estimation of archeological objects using Euler 3D deconvolution of magnetic data
... magnetic data before deconvolution. Also, for the model with objects buried on different depths, the edges of all objects are better defined and the depth better estimated after applying the reduction to the pole, although it is stated that the Euler 3D deconvolution is insensitive to magnetic declination ...
... archeological objects using Euler 3D deconvolution of magnetic data Vesna Cvetkov, Ilija Vasiljević, Mirko Petković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Depth estimation of archeological objects using Euler 3D deconvolution of magnetic data | Vesna ...
... decreases the cost of excavation. Euler 3D deconvolution in addition of defining the position of the source of the anomaly, enables quick depth estimation for magnetic data in grid from using Euler’s homogeneity relation. Testing the Standard and the Located Euler 3D methods on synthetic data has shown ...Vesna Cvetkov, Ilija Vasiljević, Mirko Petković. "Depth estimation of archeological objects using Euler 3D deconvolution of magnetic data" in 5. Hrvatski geološki kongres. Abstract Book 5th Croatian Geological Congress, Hrvatski geološki institut (2015)
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Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series
Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić (2021)Underground mining engineers and planners in our country are faced with extremely difficult working conditions and a continuous shortage of money. Production disruptions are frequent and can sometimes last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. ...deformacije podgrade, lasersko skeniranje, višekanalna singularna spektralna analiza, prognoza, klasterisanje fuzzy vremenskih serijaLuka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić. "Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series" in Energies, MDPI (2021). https://doi.org/https://doi.org/10.3390/en14123710
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Концепт расположивости при дефинисању ефикасног одржавања помоћне механизације на површинским коповима
Radiša D. Đurić (2016-05-30)Оцена расположивости представља основну компоненту уинжењерском управљању опремом. Расположивост је свеобухватни концепткоји представља меру употребног квалитета техничких система, који садржичитаву серију парцијалних индикатора који се односе на време у раду ивреме у отказу система као и на његову функционалну погодност. Овадисертација даје структурну анализу парцијалних индикатора као и развојмодела њихове синтезе на ниво расположивости. Поменути подаци имајухибридни карактер (измерени и експертски добијени) и њихова интеграцијаи синтеза је остварена коришћењем фази пропозиције и фази закључивања.Овакав приступ омогућава оцену техничког система ...управљање опремом, инжењерство одржавања,расположивост, фази закључивање, прикупљање података, булдозерRadiša D. Đurić. "Концепт расположивости при дефинисању ефикасног одржавања помоћне механизације на површинским коповима" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-05-30)
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Using Metadata For Content Indexing Within An OER Network
Ranka Stanković, Olivera Kitanović, Ivan Obradović, Roberto Linzalone, Giovanni Schiuma, Daniela Carlucci (2014)Ranka Stanković, Olivera Kitanović, Ivan Obradović, Roberto Linzalone, Giovanni Schiuma, Daniela Carlucci. "Using Metadata For Content Indexing Within An OER Network" in Proceedings of the Fifth International Conference on e-Learning, eLearning 2014, September 2014, Belgrade, Serbia, Belgrade : Belgrade Metropolitan University (2014)
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Mine ventilation system planning using genetic algorithms
The most common problem in contemporary mining practice related to the planning and analysis of ventilation systems is the optimization of partially regulated air distribution in mine ventilation networks. This paper presents a two step optimization procedure for partly regulated air distribution in mine ventilation networks. The first step is the determination of air distribution in all branches using the well known Hardy-Cross method. In the second step the distribution and parameters of air flow regulators with minimum engaged ...coal, lignite, and peat; ventilation systems; coal mining; underground mining; ventilation; mathematical models; design; air flow; optimization; calculation methods... functions can be called from any programming language within the Windows environment. The OOA model (Booch 1994) of the Gene-Hunter (GeneHunter 1996) library is given in Figure 2. The central place in the model is taken by Population with its attributes: population size, number of populations generated ...
... step the distribution and parameter values of ventilation system air flow regulators is determined, in accordance with the given limitations. The model criterion function which is being minimized is defined on basis of Telegan's theorem (Liliæ & Kuzmanoviæ 1993). According to this theorem, the power ...
... (Holland 1975). At the end of the seventies the efficiency and robustness of GA were investigated by (De Jong 1975), while Goldberg proposed an overall model of GA, with some new ideas in 1989 (Goldberg 1989). In nature, through the evolution process, those individuals that adapt themselves best, survive ...Nikola Lilić, Ranka Stanković, Ivan Obradović. "Mine ventilation system planning using genetic algorithms" in 6. international symposium on mine planning and equipment selection, Ostrava (Czech Republic), 3-6 Sep 1997, A.A. Balkema, Rotterdam (Netherlands) (1997)
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Могућност примене приручних апарата за одређивања отпорности земљишта на ерозионе процесе шумских екосистема
Никола Живановић, Вукашин Рончевић, Владимир Чебашек, Вељко Рупар, Стеван Ћорлука, Синиша Половина (2022)Деградирани шумски екосистеми не пружају довољну заштиту земљишта те су често велике површине захваћене ерозионим процесима. Важну улогу при оцени отпорности земљишта на ерозионе процесе има напон смицања. Истраживано подручје лоцирано је у југозападном делу Београда чије су површине под шумом изложене интензивним ерозионим процесима. Читава површина испресецана је јаругама и плитким клизиштима. Одабрано је 13 профила на јаругама на којима је извршено мерење отпорности земљишта приручним апаратима на три тачке дуж профила (лева обала, јаруга, десна обала) и ...Никола Живановић, Вукашин Рончевић, Владимир Чебашек, Вељко Рупар, Стеван Ћорлука, Синиша Половина. "Могућност примене приручних апарата за одређивања отпорности земљишта на ерозионе процесе шумских екосистема" in Инжењерски проблеми у меким стенама - Друга конференција регионалних геотехничких друштава, Специјализована конференција ISRM-a, Друштво за геотехника на Македонија (2022)
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Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal
Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović (2018)glukoza, fruktoza, аktivni ugalj, hidrotermalni tretman, aktivacija hidroksida, teški metali, metilen plavoSanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović . "Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal" in Minerals, MDPI (2018)
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Jurassic-Lower Cretaceous sedimentological evolution and tectonostratigraphy of the southern distal passive margin of the Alpine Atlantic in the Serbian part of the Carpatho-Balkanides
Nevenka Đerić, Renata Jach, Špela Goričan, Daniela Reháková, Alfred Uchman, Hans-Juergen Gawlick, J. Schlögl, Uroš Stojadinović (2024)Nevenka Đerić, Renata Jach, Špela Goričan, Daniela Reháková, Alfred Uchman, Hans-Juergen Gawlick, J. Schlögl, Uroš Stojadinović . "Jurassic-Lower Cretaceous sedimentological evolution and tectonostratigraphy of the southern distal passive margin of the Alpine Atlantic in the Serbian part of the Carpatho-Balkanides" in 18th Workshop of the International Lithosphere Program Task Force Sedimentary Basins, Kraków, Poland, 07–11. October 2024, Polish Geological Society (2024)
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From Mid-Jurassic extension to obduction-related Mélange Formation: Sedimentary records from a displaced segment of the Adriatic passive margin (NE Hungary)
Szilvia Kövér, János Haas, Nevenka Đerić, Ottilia Szives, Péter Ozsvárt, László Fodor. "From Mid-Jurassic extension to obduction-related Mélange Formation: Sedimentary records from a displaced segment of the Adriatic passive margin (NE Hungary)" in 18th Workshop of the International Lithosphere Program Task Force Sedimentary Basins, Kraków, Poland, 07–11. October 2024, Polish Geological Society (2024)
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Simpson's rule application for experimental determining parameters of rock mass oscillation equation at limestone
By its form, the use of explosives has a destructive character. However, energy of chemical explosives is tamed and perfected in many effects, so that is developed a series of activities which work is unthinkable without the use of explosives. In mining industry, explosives are most commonly used for exploitation in hard rock mass. Thereby, large amounts of explosives can be used, especially for mass blasting. The application of large amounts of explosives gives auspicious techno – economic indicators ...working environment, seismic effects of blasting, oscillation velocity, rock mass oscillation equation, Simpson’s ruleSuzana Lutovac, Miloš Gligorić, Jelena Majstorović, Branko Gluščević, Luka Crnogorac. "Simpson's rule application for experimental determining parameters of rock mass oscillation equation at limestone" in 8th International Conference Mining and Environmental Protection, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2021)
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Spatial assessment of the areas sensitive to degradation in the rural area of the municipality Čukarica
Nature and Landscape Conservation, Soil Science, Agronomy and Crop Science, Water Science and TechnologyNatalija Momirović, Ratko Kadović, Veljko Perović, Miloš Marjanović, Aleksandar Baumgertel. "Spatial assessment of the areas sensitive to degradation in the rural area of the municipality Čukarica" in International Soil and Water Conservation Research, Elsevier BV (2019). https://doi.org/10.1016/j.iswcr.2018.12.004