Претрага
926 items
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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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Оптимална конструкција бушотине на експлоатационом пољу Мајдан
Бранислав Миловановић (2024)Одређивање параметара конструкције бушотине представља најважнији корак ка сигурном и ефикасном опремању сваке бушотине. У овом раду биће предложен поступак за одређивање оптималних параметара експлоатационог поља Мајдан. Пример експлоатационог поља Мајдан ће бити коришћен за илустрацију предложеног поступка. Ово поље има специфичне геолошке и хидрогеолошке карактеристике које ће бити детаљно анализиране у раду. На основу ових анализа, биће предложени оптимални параметри бушотине који ће осигурати сигурно и ефикасно опремање бушотина на овом подручју.... oxjpebuiBama oBHx mnapaMeTapa Moxxe ce H3BpmrH OJipebuiBame JyOHHe yrpajibe KOJIOHA 3aHITHTHHX HCBH METOHđOM „MerojioM MHJarpaMcKor oJipebHBaMba“ Koja je r pHKa3aHa Ha CJIHIIH HCITOJU TycrwHa wcnnake [kg/dm3] 0.8 1 1.2 1.4 1.6 1.8 2 800 ——(1) KpuvBa nopHor rpuwTMckKa {2) KpiBa 0pakrypMpakbba —= ...
... reuebbe je Ko;= 1,10 29 ripurucak [bar] 0 100 200 300 400 500 0 ı ı ı ı ; 500 JlWHuja nM3ajHMpaHbba A-A 1000 JlWHuja nM3ajHMpaboa O-B R\y6wHa [m] 1500 – — — Cno;baulkbMi M yHyTpaulkb\M npwTMCcak 2000 2500 3000 Cauka 6.1 Oopebusaatbe cho:;bauubeoe u yHympauueo npumucka Marepnjan ...
... CHOJPaHIMbH IIpHTHCaK KOpHrTyjy 34 KOMOHHOBaHa OMakcujamHa omrepehema, H TO ripeMa curenehHM JenHauHHaMa: 2 a | - ops(C) -os("S).y n 2 a= | R-orsG"0 +os("0| y ban 69 TA = Ž [daN/mm?] (6.10) Inecy: Dgb- MBHHHMAaJIHa OTIHOPpHOCT Ha CIHOJPaHitbHIpHTHCaK (rH-CucHbeC) 3alTHTHHX IleBH y yCJIOBHMa ...Бранислав Миловановић. Оптимална конструкција бушотине на експлоатационом пољу Мајдан, 2024
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A Tool for Enhanced Search of Multilingual Digital Libraries of E-journals
This paper outlines the main features of Bibliša, a tool that offers various possibilities of enhancing queries submitted to large collections of TMX documents generated from aligned parallel articles residing in multilingual digital libraries of e-journals. The queries initiated by a simple or multiword keyword, in Serbian or English, can be expanded by Bibliša, both semantically and morphologically, using different supporting monolingual and multilingual resources, such as wordnets and electronic dictionaries. The tool operates within a complex system composed ...... Obradović, I., Stanković, R., Utvić, M. (2008). An Integrated Environment for Development of Parallel Corpora (in Serbian). In: Die Unterschiede zwischen dem Bosnischen/Bosniakischen, Kroatischen und Serbischen (pp. 563-578), B. Tošović (Ed.). Berlin: LitVerlag. Stanković, R., Obradović, I., Krstev ...
... Tools and Interfaces. In: Recent Advances in Natural Language Processing (vol. 5) (pp 237-248), N. Nicolov and K. Bontcheva and G. Angelova and R. Mitkov (eds.). John Benjamins, Amsterdam/Philadelphia. TMX 1.4b Specification. (2005). http://www.gala-global.org/oscarStandards/tmx/tmx14 b.html ...Ranka Stanković, Cvetana Krstev, Ivan Obradović, Aleksandra Trtovac, Miloš Utvić. "A Tool for Enhanced Search of Multilingual Digital Libraries of E-journals" in Proceedings of the 8th International Conference on Language Resources and Evaluation, LREC 2012, May 2012, Istanbul, Turkey, Istanbul, Turkey : European Language Resources Association (2012)
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A necessary and sufficient condition for an algebraic integer to be a Salem number
Dragan Stankov (2019)We present a necessary and sufficient condition for a root greater than unity of a monic reciprocal polynomial of an even degree at least four, with integer coefficients, to be a Salem number. This condition requires that the minimal polynomial of some power of the algebraic integer has a linear coefficient that is relatively large. We also determine the probability that an arbitrary power of a Salem number, of certain small degrees, satisfies this condition.Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomialsDragan Stankov. "A necessary and sufficient condition for an algebraic integer to be a Salem number" in Journal de theorie des nombres de Bordeaux (2019). https://doi.org/10.5802/jtnb.1076
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Project BEWARE—Landslide Post-disaster Relief Activities for Local Communities in Serbia
Biljana Abolmasov, Dobrica Damjanović, Miloš Marjanović, Ranka Stanković, Velizar Nikolić, Sandra Nedeljković, Žarko Petrović (2017)... produce unified B. Abolmasov (&) � M. Marjanović � R. Stanković University of Belgrade, Faculty of Mining and Geology, Đušina 7, 11000 Belgrade, Serbia e-mail: biljana.abolmasov@rgf.bg.ac.rs M. Marjanović e-mail: milos.marjanovic@rgf.bg.ac.rs R. Stanković e-mail: ranka.stankovic@rgf.bg.ac.rs D ...Biljana Abolmasov, Dobrica Damjanović, Miloš Marjanović, Ranka Stanković, Velizar Nikolić, Sandra Nedeljković, Žarko Petrović. "Project BEWARE—Landslide Post-disaster Relief Activities for Local Communities in Serbia" in Advancing Culture of Living with Landslides, Proceedings of 4th World Landslide Forum, Ljubljana 29 May-02 June 2017 3, Berlin : Springer Interantional (2017). https://doi.org/10.1007/978-3-319-53487-9_48
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Influence of DEM resolution on numerical modelling of debris flows in RAMMS - Selanac case study
Debris flows induced by intensive rainfall represent very hazardous phenomena in many parts of the World. Methods for prediction of runout distance of flow like mass movements are different and depending on the input data, rheology, and available or appropriate numerical solution. However, sometimes it is not easy to obtain pre event and post event high-resolution data in the rural or mountainous area. Thus, the topology of terrain is the most important input parameter for the every real case ...... 177-215. Schraml K, Thomschitz B, Mcardell BW, Graf C, Kaitna R (2015) Modeling debris-flow runout patterns on two alpine fans with different dynamic simulation models. Natural Hazards and Earth System Sciences 15 (7):1483-1492. Sosio R, Crosta GB, Hungr O (2008) Complete dynamic modeling calibration ...Jelka Krušić, Biljana Abolmasov, Mileva Samardžić Petrović. "Influence of DEM resolution on numerical modelling of debris flows in RAMMS - Selanac case study" in 4th Regional Symposium on Landslides in the Adriatic Balkan Region, 23-25 October 2019, Sarajevo, Bosnia and Herzegovina, Geotechnical Society of Bosnia and Herzegovina (2019). https://doi.org/ 10.35123/ReSyLAB_2019
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Why classical sequence stratigraphy doesn't work in Pannonian basin?
Dejan Radivojević (2018)... J.P. Bhattacharya, M.D. Blum, R.W. Dalrymple, P.G. Eriksson, C.R. Fielding, W.L. Fisher, W.E. Galloway, M.R. Gibling, K.A. Giles, J.M. Holbrook, R. Jordan, C.G.S.C. Kendall, B. Macurda, O.J. Martinsen, A.D. Miall, J.E. Neal, D. Nummedal, L. Pomar, H.W. Posamentier, B.R. Pratt, J.F. Sarg, K ...
... Paleogeographic evolution of the Late Miocene Lake Pannon in Central Europe, Palaeogeography, Palaeoclimatology, Palaeoecology 147, 151–167. Loucks, R. G. and J. F. Sarg 1993. Carbonate Sequence Stratigraphy, Recent Development and Applications. American Association of Petroleum Geologi ...Dejan Radivojević. "Why classical sequence stratigraphy doesn't work in Pannonian basin?" in 17th Serbian Geological Congress, Vrnjačka Banja, 17-20 maj 2018, Srpsko geološko društvo (2018)
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Geotechnical Conditions for Construction of Savski Trg Metro Station as a Part of the Belgrade Metro Line One
In order to solve serious traffic congestion in Belgrade, a number of studies regarding the Belgrade Metro construction have been carried out since 1973. However, only in 2019, the routes of the future metro lines 1 and 2 were de-fined as a part of the General Metro Construction Project. The lines are de-signed to intersect at the location of Sava Square, where an interchange met-ro station will be built. It represents a complex geotechnical structure consist-ing of three different ...Nemanja Stanic, Dragoslav Rakic, Josip Isek, Slavoljub Simic. "Geotechnical Conditions for Construction of Savski Trg Metro Station as a Part of the Belgrade Metro Line One" in Lecture Notes in Civil Engineering, Springer Nature Singapore (2024). https://doi.org/10.1007/978-981-97-8221-5_11
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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 ...... Type: | H -heavy wallf/metal plunger W - thin Wall fimetal plunger P - heauy wall fsof pack plunger S - thin wall fsot pack plunger PumpType: | R-rod T-tubing Example of a deep well pump designation according to API standards: 25 – 150– RHAM-12-5-2 21 3.2 Gas anchors Gas separators remove ...
... , i.e., lowering the pump below the perforation interval. CASING TUBING ASING T PERFORATIONS GASEOUS LIGUID COLUMN = SEATING ll!jJT Tr r i NIPPLE OPEN PUMP OR SHORT PERFORATED NEPLE GAS-FREE LIQUID | Figure 3.8. Pump below the perforation interval [6] GAS ANCHOR PERFORATIONS ...
... Downstroke Polished Rod Velocity (m/s) : 651 Maximum Upstroke Plunger Velocity (m/s) : ,662 Maximum Downstroke Plunger Velocity (m/s) : 652 Pl un ge r Ve lo ci ty (m /s ) e 0 O 2 3 4 % 6G M Đ % Plunger Posibon (cm} 6.2. Figure Well XX-1 Velocity plots 41 DEVIATION SURVEY PLOT Deviation ...Ana Ponoćko. Design of a sucker rod pumping system, 2024
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Povezivanje i detaljno snimanje donjeg potkopa rudnika ,,Crveni Breg“ na Avali
Jovan Obradović (2024)Cilj ovog Završnog rada na temu „Povezivanje i detaljno snimanje donjeg potkopa rudnika ,,Crveni Breg“ na Avali” jeste dobijanje koordinata tačaka jamskog poligonskog vlaka, kao i prikaz samog rudnika na osnovu detaljnog snimanja jame, kao poprečnih profila podzemne rudničke prostorije. U datom radu biće predstavljene metode koje su primenjene prilikom snimanja, kao i rezultati samih merenja i sva potrebna računanja da bi se došlo do potrebnih koordinata.Merenja za završni rad obavljena su tokom terenske nastave održane u junu 2024. godine ...... rudničkih prostorija........................................... 32 4.2 Laserske metode merenja poprečnih profila rudničkih prostorija .... 5 NDA R. VPJ EJ [0G RRRRRARARRARRARRAARARAAAARAAAAAAARAAAAAAAAAAAAAAAAAAAAAAAAARAAAAAAAAAAAAAAAAAARAAAAAAAARRARAAAARAAAR 40 5.1 Istorijat rudnika „Crveni breg“ ...
... razred G. U poligonskim vlakovima na zemljištu razreda A, dozvoljena odstupanja su zadata preko relativne greške vlaka sračunate po Jednačini: _/a R d}' gde je: fJa=NXy+e, [d] = suma dužina u vlaku. TABELA 2-2 – PREDNOSTI DOZVOLJENE GREŠKE ZA RAZRED 4; Vlak Dozvoljena relativna greška my ...
... vlaka i zbog toga su dozvoljena odstupanja u tabeli 2-4, orijentacione vrednosti koje važe samo do granice 0,8 M, gde je M imenilac iz razmere plana (R =1:M). U jednačini za dozvoljeno odstupanje n je broj veznih i prelomnih uglova u vlaku. 21 U slepim poligonskim vlakovima, dozvoljeno odstupanje ...Jovan Obradović. Povezivanje i detaljno snimanje donjeg potkopa rudnika ,,Crveni Breg“ na Avali, 2024
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Техно-економска оцена подземног откопавања лежишта бакра применом коморно-стубне методе
Александра Бараћ (2024)Коморно-стубна метода са блоковским откопавањем и засипавањем откопа паста засипом омогућује високу продуктивност, флексибилност при раду, остварење пројектованог производног задатка, минимално осиромашење откопане руде, у овом случају руде бакра, висок степен искоришћења расположивих рудних резерви. Припрема лежишта за експлоатацију представља инвестицију у рударској производњи,а сам коначан производ треба ,не само да отплати те трошкове, већ и да донесе новчану добит.Самим тим је од великог значаја адекватан одабир методе откопавања, која ће на најбољи могући начин испунити све захтеве.Основни показатељи ...... IIeHTpa rpena3Hor JIyKa, Ri – pajjyc JIyKa CBOJa, R- – panujyc rpena3Hor JIyKa, a — HOJIOBHHAa IIHpHHe IIpOCTOpHje, lu — niHpHHa HpocTopHje, O – yrao noJa JyKa CBOJIA, p - yrao npenasHor JTyka. 22 Ha OcHOBy OBHX JIHMeCH3Hja IIO3HaTO je: F=R-·n· 1 2 360• 2·a F=R·n· 2 1 360* a+Rı ...
... ocHrypahba 0.5 % BpeJiHocTH onpeMe H oOjekaTa rojmHmripe.OcrajH HeoOyxBaheHu TpomIKoBH oOpauyHaTH cy y H3Hocy o 0O,76 %/r pyne.TpomnrikoBH dinoranuje oOpauyHaTu cy y H3Hocy oJ 4,94 S/r cyBe py}ne TpomkoBH MerTajJtypmike rpepane oOpauyHaTuH Cy y H3HOCy OJ 600 USD/t 6akpa 600 USD/kg snara 30 USD/kg ...
... OJHoc Kajmije H HarpuHje 3a XHJIDOTeDMaJIHO H3MCMbĆHC HeOPpy)beHec CcTeHe je 1:3.6. CBe mojenMHauHe aHaJm3e y KOHTypH 3amaror rpaHHuHor cajnp:xkaja o,r 0,3% Cu, rperupaHe cy Kao npoOe H3 OpyMbeHor HHTepBana HnpeceucHor OymmoTHHaMa. JleMoBH HCTpa)KHHX pajnoBa ca cpe,bHM callpxkajeM Hcro,ji rpaHuHor ...Александра Бараћ. Техно-економска оцена подземног откопавања лежишта бакра применом коморно-стубне методе, 2024
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Hydrogeochemistry of Uranium in the Groundwaters of Serbia
Marina Ćuk, Maja Todorović, Petar Papić, Jovan Kovačević, Zoran Nikić. "Hydrogeochemistry of Uranium in the Groundwaters of Serbia" in Uranium - Past and Future Challenges, Springer International Publishing Switzerland (2015). https://doi.org/10.1007/978-3-319-11059-2_89
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Upotreba lidar tehnologije i digitalne fotogrametrije primenom iPhone pametnih telefona na primeru rudnika "Rudnik"
Nikola Mirković, Luka Crnogorac, Aleksa Paunović. "Upotreba lidar tehnologije i digitalne fotogrametrije primenom iPhone pametnih telefona na primeru rudnika "Rudnik"" in 15. Simpozijum „Rudarstvo 2024“ Održivi razvoj u rudarstvu i energetici, Vrnjačka banja, 21-24. maj 2024., Beograd : Institut za tehnologiju nuklearnih i drugih mineralnih sirovina (2024)
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The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector
Natural gas is used for the production of almost 20% of total energy today. The natural gas security of the Republic of Serbia is an urgent strategic, political and security issue. Serbia is one of the most vulnerable countries in Southeast Europe, because it only has one supply route. This study is a contribution to efforts to better understand the factors affecting energy security through the implementation of a new methodology based on the fuzzy–AHP synthesis model for measuring ...... Sector Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector | Aleksandar R. Madžarević, ...
... www.dr.rgf.bg.ac.rs symmetryS S Article The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector Aleksandar R. Madžarević *, Dejan D. Ivezić, Miloš L. Tanasijević and Marija A. Živković Faculty of Mining and Geology, University of Belgrade, Djusina 7, 11000 ...
... com/journal/symmetry se symmetry (mort, Article The Fuzzy—AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector Aleksandar R. MadiZarevié *, Dejan D. Ivezié, Milos L. Tanasijevié® and Marija A. Zivkovié Faculty of Mining and Geology, University of Belgrade, Djusina 7, 11000 ...Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković. "The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector" in Symmetry, MDPI AG (2020). https://doi.org/10.3390/sym12060908
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Процена емисије гасова са ефектом стаклене баште као последице енергетске активности
Горана Остојић (2024)Рад се бави анализом и проценом емисија гасова са ефектом стаклене баште, са посебним акцентом на емисије које настају као последица енергетских активности. Ефекат стаклене баште представља природни процес који је неопходан за одржавање живота на Земљи, али антропогене активности, попут индустријске производње и сагоревања фосилних горива, значајно повећавају концентрацију ових гасова у атмосфери, што доводи до климатских промена. Рад истражује узроке, последице и могућности за смањење емисија гасова, као и развој стратегија за ублажавање негативних ефеката на животну ...емисија гасова, ефекат стаклене баште, енергетске активности, климатске промене, мобилно сагоревање, стационарно сагоревање... ) N I O R BE 1 8080 | . B B.B E,. |, ijin ilji ii i|| ilj || P LE BRB BIR NIR : 381 | 08 Teecew |Patee Aurver Ocv Te | -_1— =- -- e (Osme o :——:—·?–—–h•-h– oč NGe“ eke de e eke la Navća aaada L N NIIA d3 | W W W MTM . MI MI W MI WI W u MAs __KM __O _ |D __ ___ R aŠ — 38G ...
... WNNEF – WNHL WWNF | W -M8 | 408 ____ B k_ _J t_ L_ ı E I ı r " – - - - i —. i - L NE WWN W NE i BO - - - _ ı E NINR NNN - - 0 = f _J L HER Yc pj,cOu aape O Cercga » omaa F jre=a jhazspy Os c:=. free » eg wrgy 1<-ty re |r ara i. BawdBae P supan 105 TIpouena eucuje zacosda ca ...
... TaCOBa KOJH HacTajy Kao mocime/uia pa3niHuHTHX JbyJICKHX aKTHBHOCTH H KOJH ce KBaJmi(DHKyJy KaO TracoBH cTaKJeHe Oamrre y arMoOc(bepH. IHIro ce raue r 1o0anHix KJIHMaTCKHX IIDOMeHa, TO je (DeHOMeH TOKOM KOJeT Ce MeFbajy CBH CJIČCMCHTH KJIHMC TO0JL yTHIajeM rao0ajHor pacTa TeMnepaTypa. /la edekar ...Горана Остојић. Процена емисије гасова са ефектом стаклене баште као последице енергетске активности, 2024
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Archaeometric study of medieval pottery excavated at Stari (Old) Ras, Serbia
Damjanović Ljiljana, Holclajtner Antunović Ivanka, Mioč Ubavka, Bikić Vesna, Milovanović Dragan, Radosavljević Evans Ivana (2011)Damjanović Ljiljana, Holclajtner Antunović Ivanka, Mioč Ubavka, Bikić Vesna, Milovanović Dragan, Radosavljević Evans Ivana. "Archaeometric study of medieval pottery excavated at Stari (Old) Ras, Serbia" in Journal of Archaeological Science 38 no. 4, London, England:Academic Press Ltd- Elsevier Science Ltd, 24-28 Oval Rr, London NW1 7DX, England (2011): 818-828. https://doi.org/10.1016/j.jas.2010.11.004
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Compressive strength and hydrolytic stability of fly ash based geopolymers
Nikolić Irena, Đurović Dijana, Zejak Radomir, Karanović Ljiljana, Tadić Milena, Blečić Dragoljub, Radmilović Velimir. (2013)Nikolić Irena, Đurović Dijana, Zejak Radomir, Karanović Ljiljana, Tadić Milena, Blečić Dragoljub, Radmilović Velimir.. "Compressive strength and hydrolytic stability of fly ash based geopolymers" in Journal of the Serbian Chemical Society 78 no. 6, Karnegijeva 4/3, 11000 Beograd:Srpsko hemijsko društvo (2013): 851-863. https://doi.org/10.2298/JSC121024001N
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Geopolymerization of coal fly ash in the presence of electric arc furnace dust
Nikolić Irena, Đurović Dijana, Blečić Dragoljub, Zejak Radomir, Karanović Ljiljana, Mitsche Stefan, Radmilović Velimir (2013)Nikolić Irena, Đurović Dijana, Blečić Dragoljub, Zejak Radomir, Karanović Ljiljana, Mitsche Stefan, Radmilović Velimir. "Geopolymerization of coal fly ash in the presence of electric arc furnace dust" in Minerals Engineering 49, Radarweg 29; Amsterdam, 1043 NX; Netherlands:Elsevier BV (2013): 24-32. https://doi.org/10.1016/j.mineng.2013.04.007
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Karstification depth and storativity as main factors of karst aquifer regimes: some examples from southern Alpine branches (SE Europe and Middle East)
Zoran Stevanović, Vesna Ristić-Vakanjac, Saša Milanović, Ljiljana Vasić, Branislav Petrović, Marina Čokorilo-Ilić (2015)Zoran Stevanović, Vesna Ristić-Vakanjac, Saša Milanović, Ljiljana Vasić, Branislav Petrović, Marina Čokorilo-Ilić. "Karstification depth and storativity as main factors of karst aquifer regimes: some examples from southern Alpine branches (SE Europe and Middle East)" in Environmental Earth Sciences, Springer Science and Business Media LLC (2015). https://doi.org/10.1007/s12665-015-4046-y
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Identification and characterization of single crystal Bi2Te3-xSex alloy
Požega Emina, Ivanov Svetlana, Stević Zoran, Karanović Ljiljana, Tomanec Rudolf, Gomidželović Lidija, Kostov Ana (2015)Požega Emina, Ivanov Svetlana, Stević Zoran, Karanović Ljiljana, Tomanec Rudolf, Gomidželović Lidija, Kostov Ana. "Identification and characterization of single crystal Bi2Te3-xSex alloy" in Transactions of Nonferrous Metals Society of China 10 (25), ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS Elsevier Science BV, PO Box 211, 10:Elsevier BV (2015): 3279-3285. https://doi.org/10.1016/S1003-6326(15)63964-4