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Упит dcterms_creator_txt:Marko D. ERCEGOVAC

949 items

  • Proračun osnovnih mehanizama na rotornom bageru ShRs 1300 na PK Polje E

    Luka Nikolić (2024)
    Površinska eksoloatacija ležišta mineralnih sirovina, a posebno uglja (lignita) vrši se primenom različitih rudarskih mašina. U zavisnosti od tipa ležišta, rudarsko-geoloških uslova, ekonomske analize i sl. koriste se sistemi sa kontinualnim ili diskontinualnim načinom rada.Kod kontinualnih sistema, primenjuju se kompleksne rudarske mašine kod kojih se proces odvija neprekidno odnosno bez ciklusa utovara, transporta i odlaganja i najčešće rade u sve tri smene. Rotorni bageri i bageri vedričari, transporteri sa gumenom trakom, odlagači ili deponijske mašine čine tkz BTO ili ...
    rudarstvo, rotorni bager, ugalj, ShRs 1300
    ... > Debljina reza s= 0,sam Broj podetaža u bloku: >n > — 0,55D — | bDOd — 0,7«D 26 26 > Tood Č 0,5+9 b 0,79 5,8 > moa > 4,1 Tnod = 5 Visina podetaža: 0,5*%DD Visina I podetaže: hI = 0,6 * D = 0,6 * 9 » 5,4 = 5,5[m] Visina ostalih. II, IILIV podetaža: H-hI _ 26—5,5 npod—1 ...
    ... 60*U T7T*D*nm 7r*9*5,85 m n = — U =O ——= = 2,75 — T7T*D 60 60 s n 134,7 n, = = _ = 5,85 m 23 nr- broj obrtaja rotornog točka u minuti n- broj pražnjenja kofica u minuti m- broj kofica koji je u kontaktu sa masivom mi=1+ % = 1+. =6,75 U KONTAKTU 6 VEDRICA a = 90 + Aaq = 909 D h-ZS __0 ...
    ... Zaustavljanje sprave................i d aeaoı kod 20 m/s Van pogona (konstruktivno uzeto u obzir)................cia.. do 35,8 m/s Diplomski rad Univerzitet u Beogradu – Rudarsko-geološki fakultet Dozvoljeni nagib: U radu: Uzdužni nagib................... d tavtdon 1:33=3 % Poprečni nagib. ...

  • Contribution to the geotechnical classification of municipal waste landfills in Serbia

    Dragoslav Rakić, Irena Basarić, Laslo Čaki, Slobodan Ćorić (2018)
    Management, Monitoring, Policy and Law, Nature and Landscape Conservation, Geochemistry and Petrology, Waste Management and Disposal,Geotechnical Engineering and Engineering Geology,Water Science and Technology,Environmental Chemistry,Environmental Engineering

  • The external aggregation Newton's method for solving nonlinear equations and applications

    Marija Paunović, Dejan Ćebić, Nebojša Ralević (2020)
    Њутнов метод, агрегациона функција, ред конвергенције

  • A tool for identifying the criticality in the disordered systems with metastable dynamics

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Stefan Graovac, Đorđe Spasojević (2021)
    Физика кондензоване материје

  • English for Geology Students. 2

    Lidija Beko (2023)
    Engleski jezik
    ... JMN a M, 2MA do a a -yy „O laJaM-Jja Reading Comprehension...........ca. (rammarispo{(-. .J . :yar-Ja%93 270 y Myaı . D . - a ı- eyala y a -yskt ipixercisesL, d. ...... a d W · -kef Ag • ,,, 5v -P ON 2 . a SOMa. Geological Wonders.......... t Profession – Young Geotechnician................ ...
    ... Comprehension..........iii .. 133 Part3 MILANKOVITCH CYCLES........ ttt 134 Vocabulary........k.coac a dd0 dd d a d 2 MNMBA o a 138 Reading Comprehension...........toe. 140 (Gitranae10y99X1) d op:obk,Cb ojo 0B oo?baagoodgo0oodooo0000600odQ 141 JExercises A NA a 24 O7 NFU . MN . o.. . a JoB. faR , OOO ...
    ... .. Geology through Myths.............a. • Unit4• HYDROLOGICAL CYCLE AND GROUNDWATER HYDROLOGICAL CYCLE......t tt ttt Vocabulary.......... .. d.. aMaR M . da da a lu l, alakejh Reading Comprehension..........i e GRGUNDWA:TERI .. .MRVNVA . |, . R. . ... JN NEKOJ. .Pt . NNNA MV/oveployuliyoog ...

  • An intelligent hybrid system for surface coal mine safety analysis

    Nikola Lilić, Ivan Obradović, Aleksandar Cvjetić (2010)

  • Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija

    Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić (2016)
    flotacijska jalovišta, životna sredina, višekriterijumska analiza, ekologija, Trepča
    ... i f d ≤ 0 d p , i f 0 < d ≤ p 1, i f d > p IV Nivoj criterion—stage criterion P (a, b) =      0, i f d ≤ 0 1 2 , i f 0 < d ≤ p 1, i f d > p V Criterion with linear preference and domain of indifference P (a, b) =          0,i f d ≤ 0 d − p p − q ,i f 0 < d ≤ p 1 ...
    ... For the shorter text, the sign d is involved, d = f(a) − f(b). According to Brans and Mareschal (1984) [28], there are six types of preference function: I “Simple” criterion P (a, b) = { 0, i f d ≤ q 1, i f d > q II Quasi criterion P (a, b) = { 0, i f d ≤ 0 1, i f d > q III Criteria for linear ...
    ... 1,i f d > p Energies 2016, 9, 935 10 of 18 VI Gauss criterion P (a, b) =    0, i f . . . d ≤ 0 1 − e d2 2I f 2 i f . . . d > q For the multi-criteria analysis method, PROMETHEE involves preference streams: φ+ j ( aj ) = ∑ j m=1ΠP ( aj, am ) positive stream φ− j ( aj ) = ∑ j ...

  • Differently shaped nanocrystalline (Fe, Y)3O4 and its adsorption efficiency toward inorganic arsenic species

    Biljana P Dojčinović, Boštjan Jančar, Lotfi Bessais, Aleksandar Kremenović, Nataša P Jović-Jovičić, Predrag T Banković, Dalibor M Stanković, Miloš Ognjanović, Bratislav V Antić (2019)
    Herein we report effects of partial substitution of Fe3+ by Y3+ in magnetite (Fe3O4) on morphology and inorganic arsenic species adsorption efficiency of the Fe3−xYxO4 nanoparticles formed. The series of Fe3−xYxO4 (x=0.00, 0.042 and 0.084, labeled as Y00, Y05 and Y10, respectively) was synthesized using co-precipitation followed by microwave-hydrothermal treatment (MW) at 200°C. With increase of yttrium content(xvalue), both the morphological inhomogeneity of the samples and the fraction of spinel nanorods as compared to spinel pseudospherical particles increased. By ...
    microstructure, microwave-hydrothermal synthesis, adsorption, magnetic nanoparticles, arsenic

  • Одређивање оптималних параметара рада бушотина у повременом гаслифту

    Радослава Јованчевић (2024)
    Гаслифт представља механичку методу производње при коме се производна бушотина снабдева гасом под високим притиском, а његова притисна енергија се користи како би се подржао еруптивни рад бушотине или након еруптивног рада, у циљу истискивања заосталог флуида. Два основна типа гаслифта су повремени и континуални гаслифт. У овом раду је детаљније описана метода повременог гаслифт система. Одређивање оптималне количине гаса који се утискује и расподела ограничене количине гаса на групу бушотина представља битан део пројектовања сваког гаслифт система. Главни ...
    гаслифт, повремени гаслифт, пројектовање, производња, оптимизација
    ... P.n= 9 bar twh= 13,3?C Puw= 104 bar Qom= 6,7 mŠ/kg GOR= 62 mš3/m? ps= 0,66 kg/mš Pinj= 38,4 bar Qzav= 3600 mž/dan z=0,91 D=2 7/g" = 0,07302 m D.= 4,76, R= 0,035 IIpaMeHoM Borej-oBe MeroJte pauyHaMo KpHBy IPR kpunBy 3a rpBy OymoTuny: (4.1) 17 , = 0,16485 qamax ___67 domax ...
    ... P.n= 9 bar tw= 13,3%C P= 105 bar Qom= 6,5 mŠ/kg GOR= 62 mš3/m? p:= 0,66 kg/mš Pinj= 38,4 bar Qxav= 3600 m“/dan z=0,91 D=2 7/g" = 0,07302 m D.= 4,76, R= 0,035 IIpaMeHoM BoreJ-oBe MeTOJIe H HCTHX (bopMyiIa Kao H KoJI ripBe OynrloTHHe, pauyHaMO KpHBy IPR KpHBy 3a Mpyry OymoTuHy ...
    ... 45 50 Go (m3/d) Cnuka 4.7 - IPR kpuga 3a npey 6yuiomuHy 23 CnenehH Kopak Je onpebHBambe VLP KpHBHX H MDHXOBHX HIpeceuHHx Tauaka ca IPR KPHBOM, KOje Jajy Tauke KpHBe KapakTepHcTHKe Ppalla. 140 120 100 [} o Pw f (b ar ) [ DN [-] 40 20 10 20 30 40 Qo (m3/d) 60 70 ——IPR ...

  • 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, ...
    Ukrasni kamen, Mezozoik, Krečnjak, Srbija, Petrografija, Fizičko-mehanička svojstva
    ... I - D 4 ! 91 091 iil 00 0 0 LO O I 0 6 9 | 1I-Di 97c s 4l is \J tPcO x x 069C O I - D c O LI 011 | 0 00 910 LI O c ' 089% 67Di ba:00 6 1 861 1Ic 00 0 0 0 O I 069% D [ 61 t0C LO 00 910 x O c O I L D _ ...
    ... Hungary_7~ ~ Croatia~ _ BOg Belgrade * Romania • |d} SERBIA i Montenegro B@llgaria ) albania/ ,7 a 2, Macedonia Fig. 1 Map of Serbia and the location of quarries of investigated limestone: a Klisura; b Skrzut; c Struganik; d Tisnica analysis, indicates that these sediments are of ...
    ... x O c 6L9% I-DI % (An) (quuo O/6000) | (UMGI/N) (%0) 3SOJJ | (UIUH/N) (\0) 10JBA (Juuuu/N) (*9) Aup - d) (ssvur Jo ssol) | uopdaosqe - d) - (Hu/9%)(dgZ) - („yS%)(dS'Z) (4y) OA1SeIqe IOAA | UjBUOJS oAISSoIdutOO) | UjGUOJS OAISSoIduIOO) | i}SUOJ)S ...

  • Interaction of sodium dodecylsulfate (SDS) with homoionic montmorillonites: adsorption isotherms and metal-ion release

    M. Ilic, J. Gonzalez, A. Pohlmeier, H. D. Narres, M. J. Schwuger (1996)
    The interaction of dodecylsulfate anions (DS−) with homoionic Ca-, Mg-, Ni-, Cu-, Cd-, Pb- and Fe-montmorillonites were investigated. Mg- and Cd-montmorillonite do not adsorb DS−, and an anion exchange at the edges of the clay mineral does not take place. Three different adsorption processes are identified on the other montmorillonites: i) Fe-montmorillonite is covered with amorphous iron hydroxide, and DS−-anions are bound at positively charged sites. ii) On Ca- and Pb-montmorillonite DS− is precipitated as Me(DS)2. iii) On Ni- ...
    Натријум додецилсулфат, адсорпциона преципитација, монтморилонит

  • An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)

    N. Andrić-Tomašević, V. Simić, O. Mandic, D. Životić, M. Suárez, E. García-Romero (2020)
    Paleontology,Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics,Oceanography

  • Избор одговарајуће механичке методе

    Анастасија Мирјанић (2024)
    Експлоатација нафте и гаса кључна је за задовољење глобалних енергетских потреба. Различите методе се користе за ефикасно вађење тих природних ресурса из земљe. Механичке методе експлоатације, које укључују различите врсте пумпи и компресора, играју значајну улогу у овом процесу. У нафтној индустрији, ефикасно вађење нафте и гаса зависи од избора одговарајуће технологије пумпања. Две од најраспрострањенијих технологија су дубинске пумпе са клипним шипкама (енгл. Sucker rod pumps- SRP) и електричне потапајуће пумпе (енгл. Electrical submersible pump- ESP). Овај завршни рад ће ...
    дубинске пумпе са клипним шипкама, замена, електрична потапајућа пумпа, производња, бушотина

  • Tectonic evolution of the Vršac Mts. (NE Serbia): Inferences from field kinematic and microstructural investigations

    Uroš Stojadinović, Nemanja Krstekanić, Bojan Kostić, Marija Ružić, Aleksa Luković (2021)
    The Vršac Mts. in NE Serbia represent the key area to investigate structural relations between the Northern Serbo-Macedonian Subunit and Supragetic Unit of the Dacia Mega-Unit. The geodynamic events during the Variscan orogeny in the Late Paleozoic colligated the two units and led to their metamorphic differentiation. The Late Cretaceous extension exhumed the medium-grade Serbo-Macedonian metamorphic rocks and structurally juxtaposed them against the low-grade metamorphosed basement of the Supragetic Unit along an E-dipping shear zone, which outcrops in the ...
    severna srpsko-makedonska subjedinica, supragetikum, kinematska analiza, multifazna ekstenzionalna deformacija
    ... suggested fault AlpsAlps A p e n n in e s A p e n n in e s C a rp a th ia n s C a rp a th ia n s ALCAPAALCAPA Tisza-D acia Tisza-D acia D inarides D inarides A d ria A d ria H e lle n id e s H e lle n id e s Balkan sideBalkan side Rhodope Rhodope deformation fronts suture zones r ...
    ... a r p a t h i a n s B a l k a n i d e s B a l k a n i d e s M o e s i a n M o e s i a n P m l a t r f o P m l a t r f o T F T F TFTF C F C F M o r a v a V a l l e y C o r r i d o r M o r a v a V a l l e y C o r r i d o r Jastrebac Mts.Jastrebac Mts. Vršac ...
    ... Mountrakis D. 1997: Alpine tectonometa- morphic history of the Serbomacedonian metamorphic rocks: implication for the tertiary unroofing of the Serbomacedo- nian-Rhodope metamorphic complexes (Makedonia, Greece). Mineral Wealth [Ορυκτός Πλούτος] 105, 32–50. Kilias A., Falalakis G. & Mountrakis D. 1999: ...

  • A survey of greenhouse gases production in central European lignites

    Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska (2021)
    Lignit, Gasovi sa efektom staklene bašte, Ugljen dioksid, Metan, Azotni oksid
    ... n oitc u d or p 4 ss a m yr d g 1- y a d 1- ) 0.0 0.2 0.4 0.6 60.0 80.0 100.0 120.0 K B R V LN -W 1 V LN -W 2 K N N -W 1 K N N -W 2 TC B - W 1 TC B - W 2 B C B - W 1 B C B - W 2 O C 2 O C l o m n( n oi tc u d or p 2 ss a m yr d g 1- y a d 1- ) 0 ...
    ... geotechniczne skal nadkladu w Koninskim Zaglebiu Wegla Brunatnego, Przeglad Geologiczny. Myhre, G., Shindell, D., Bréon, F., Collins, W., Fuglestvedt, J., Huang, J., Koch, D., Lamarque, J., Lee, D., Mendoza, B., Nakajima, T., Robock, A., Stephens, G., Takemura, T., Zhan, H., 2013. Anthropogenic and natural ...
    ... Brezigar, A., Kosi, G., Vrhovsek, D., Velkovrh, F., 1985. Paleontoloske raziskave pliokvartarne skladovnice velenjske udofine. paleontological investigations of the plio-quaternary beds of the Velenje depression. Geologija 28 (29), 93–119. Bucha, M., Jedrysek, M.O., Kufka, D., Plesniak, L., Marynowski, L ...

  • Structural dissymmetrization of optically anisotropic Grs64±1Adr36±1Sps2 grandite from Meka Presedla (Kopaonik Mt., Serbia)

    Pavle Tančić, Aleksandar Kremenović, Predrag Vulić (2019)
    In this paper, grandite core with Grs64±1Adr36±1Sps2composition was crystallographically studied. This core represents zone A of the macroscopically visiblefive A–E zones of the optically anisotropic Grs58–64 Adr36–42Sps2 grandite. The applied procedure includes the detailed analysis of the powder diffraction patterns, and the Rietveld refinements of the crystal structures in a series of 18 space groups and two mixtures, which were followed by the comparative analysis of the R-values, site occupancy factors, and the bond lengths and angles. Synthesis of all ...
    grandite, XRPD, crystal structure, structural dissymmetrization

  • Valorization of non-balanced coal reserves in Serbia for underground coal gasification

    David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)
    In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...
    ugalj, gasifikacija, zaštita životne sredine, skladištenje, solarna
    ... Technology, Potsdam, Germany, 2009, 1, pp. 43-50 2] Petrović, D., Calculation of Underground Coal Gasification in Non-Balance Coal Reserves, Study of UCG through Possibility of Application in Out of Balance Coal Reserves in BiH, in Serbian, Ph. D. thesis, Faculty of Mining, Geology and Civil Engineering ...
    ... Environmental, Bloomington, Ind., USA, 2011 4] Petrović, D., ef al., Status and Tendecies under Development and Application of UCG (in Serbian), Pro- ceedings, International Conference EEI 2018., Belgrade, Serbia, 2018, pp. 65-73 5] Greeg, D. W., et. al.. Underground Coal Gasification, 4merican Institute ...
    ... Moscow, Russia, 2004 11| Petrović, D. et. al., Possibilities of Coal Conversion into Gas Fuel from the Aspect of Greater Valorization of Available Energy Resources in Serbia by Implementing UCG, RMZ-Materials and Geoenvironment, 57(2010), 1, pp.113-125 Petrović, D. T., et al.: Valorization of No ...

  • From post-disaster landslides inventory to open landslides data

    Biljana Abolmasov, Miloš Marjanović, Uroš Đurić, Jelka Krušić (2021)

  • Rift sequence stratigraphy and its contribution to source rock understanding – Serbian part of Pannonian Basin

    Filip Anđelković, Dejan Radivojević (2018)
    ... Radivojević, D. 2018. Upper Miocene depositional environments of Kikinda-Mokrin High (Serbia). Interpretation 6 (1), SB65–SB76. Kostić, A. 2012. Petroleum Generation in the Southeastern Part of the Pannonian Basin (Serbia). Technics – Mining, Geology and Metalurgy 63, 43–47. Lučić, D., Saftić, B. ...
    ... Memoir 84, 619–632. Matenco, L. Radivojević, D. 2012. On the formation and evolution of the Pannonian Basin: Constraints derived from the structure of the junction area between the Carpathians and Dinarides. Tectonics 31 (6), TC6007. Radivojević, D., Rundić, Lj. 2016. Synrift and postrift Miocene ...

  • A multi-criteria approach for assessing the potential of renewable energy sources for electricity generation: Case Serbia

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    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 ...
    Proizvodnja električne energije, Obnovljivi izvori energije, Višekriterijumsko odlučivanje, Srbija
    ... Assume that: d′(Ai) = minV (Si ≥ Sk) (10) for k = 1,2, . . .n; k̸=i. Then the weight vector is given by: W ′(d′(A1), d ′(A2), . . . , d ′(Am)) T (11) where (Ai = 1,2, . . . , n) are n elements. Via normalization, the normalized weight vectors are (Chang, 1996): W (d(A1), d(A2), . . . , d(An)) T (12) ...
    ... ordinate of the highest intersection point D be- tween µM1 and µM2(Fig. 5). When M1= (l1, m1, u1) and M2= (l2, m2, u2), the ordinate d is given by next equation: V (M2 ≥ M1) = hgt(M1 ∩ M2) = µM2 (d) (8) µM2 (d)= ⎧ ⎪ ⎨ ⎪ ⎩ 1, if m2 ≥ m1 0, if l1 ≥ u2 l1−u2 (m2−u2)−(m1−l1) otherwise To compare ...
    ... on point D (Chang, 1996). The degree of possibility of M1 ≥ M2 is defined as: V (M1 ≥ M2) = sup x≥y [min (µM1 (x) , µM2 (y))] (6) Since M1 and M2 are convex fuzzy numbers then the following rules are applied: V (M1 ≥ M2) = 1 iff m1 ≥ m2 (7) V (M2 ≥ M1) = hgt(M1 ∩ M2) = µM1(d) where d is the ordinate ...