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Упит dcterms_creator_txt:Krstić Slađana D.

965 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. ...

  • Long-term planning methodology for improving wood biomass utilization

    Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković (2019)
    The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...
    Long-term planning methodology, Forest biomass, MINLP, Backcasting
    ... Karamarkovi�c R, Jeroti�c S, Gordi�c D, Stojiljkovi�c M, Kljaji�c M. Uputstvo za izradu energetskog bilansa u op�stinama (Guides for making energy balance in municipalities). Belgrade: Ministry of Mining and Energy; 2007. [61] �Zivkovi�c M, Ivezi�c D, Mad�zarevi�c A, Mani�c D, Kordas O, Pereverza K, Pasichnyi ...
    ... Karamarkovi¢ R, Jeroti¢ S, Gordi¢ D, Stojiljkovi¢ M, Kljajic M. Uputstvo za izradu energetskog bilansa u opStinama (Guides for making energy balance in municipalities). Belgrade: Ministry of Mining and Energy; 2007. Zivkovié M, Ivezié D, Madzarevi¢ A, Mani¢ D, Kordas O, Pereverza K, Pasichnyi O, VukaSinovic ...
    ... objective functions can be calculated according to (Eq. (2) e Eq. (5)). NPV can be calculated as: NPV ¼ ANP, 1� ð1þ dÞ�lc d � Inv (2) where: ANP [V] - Annual Net Profit, d [%] - discount rate. lc [year] - project lifecycle. Inv [V] - investment. NPVQ is the ratio between NPV and investment: NPVQ ...

  • 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
    ... Aggre- gation Function, Cambridge University Press. Herceg, D. & Herceg, D. 2013a. Means based modifications of Newton’s method for solving nonlinear equations, Applied Mathematics and Computation, 219(11), pp. 6126-6133. Herceg, D. & Herceg, D. 2013b. Third-order modifications of Newton’s method based ...
    ... f&@ k-1yk-1 1 Ge) & (1 + WD D kl Pe p (2k die+2 —(k+ Dd )e + o(e?)) [I+ + dist ‘en(1 + deri ent R(k- Pat Phdea - (k + 1) de, er + o(e?)) + diya « (& ten P(1 + ep derien + 2 -(k + 1)d?, Jen + o(e?)) + o(e?)| f(a) ~ mr Ten ml + (k- Dimen HAk+1en + FuSD (2kdysa — (k + 1)d?,, Je? + 0(€2)) 2 k-1)(k-2 NE ...
    ... diszen’? + O(n”) (8) okt? + o(ek*?)), Similarly, f'n) = f'(ay+ f'(@en + Ler@ k f(@) ok! f(a) e+... ike D! ek 2! fn (k+2) k! €n a, + heel nit oe (k) (k+1) (k+2) = LPO) 1 LPO 4 LPO gu (k— 1! en kL" (k+D! f@) = [k ee k+l) + o(ekt!) V4 (k+ Wdessek + (k + 2)derze! + o(e&!)] k+1 k+2 dren + ——dyyre, + ...

  • 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
    ... 347–354. Rakic D, Caki L and Basaric I (2015) Phase relations and indicators of municipal waste physical condition. Proceedings of the 4th International Conference: Regional Waste Management, Ohrid, Macedonia, pp. 211–220. Rakic D, Basaric I, Berisavljevic Z and Berisavljevic D (2016) Geotechnical ...
    ... t: % R u b b e r – 1 ·6 % W o o d – 2 ·9 % T e xt ile – 3 ·4 % P a p e r – 5 ·3 % M e ta l – 5 ·7 % C e ra m ic s – 8 ·9 % G la ss – 1 4 ·3 % U n cl as si fi ed – 5 7 ·9 % R 49·5% IC 50·5% Grain size d: mm 100 Figure 9. Cumulative particle size ...
    ... e r b y w e ig h t: % Cumulative Soil Unclassified Ceramics 0 10 20 30 40 50 0·01 0·1 1 10 100 Grain size d: mm C e ra m ic s – 5 ·4 % U n cl a ss ifi e d – 3 4 ·6 % S o il – 6 0 ·0 % Figure 10. Cumulative particle size distribution curve and per cent curve for material ...

  • 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
    ... 214422 S. Mijatović, D. Jovković, S. Janićević et al. Physica A 572 (2021) 125883 [39] D. Spasojević, S. Janićević, M. Knežević, Exact results for mean-field zero-temperature random-field Ising model, Europhys. Lett. 76 (2006) 912, http://dx.doi.org/10.1209/epl/i2006-10361-8. [40] D. Spasojević, S. Janićević ...
    ... Tadić, S. Mijatović, S. Janićević, D. Spasojević, G.J. Rodgers, The critical barkhausen avalanches in thin random-field ferromagnets with an open boundary, Sci. Rep. 9 (2019) 6349, http://dx.doi.org/10.1038/s41598-019-42802-w. [46] S. Mijatović, D. Jovković, S. Janićević, D. Spasojević, Critical disorder ...
    ... significant number of numerical studies appeared regarding the critical behaviour of RFIM for dimensions D ≥ 3 [33–36], the scaling laws of the avalanche parameters [37–39], the critical behaviour for D = 2 [40] and accompanying avalanche parameters’ distributions [41,42]. In recent years, the question about ...

  • 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)
    ... opencast mine Kolubara field D: a case study This section illustrates the use of the PROTECTOR hybrid system in the analysis and estimation of the state of mining environment safety in the opencast mine Kolubara Field D. One of the main reasons for choosing opencast Kolubara Field D for the analysis is ...
    ... estimated characteristics of dust concentration at Field D open pit (bucket-wheel excavator G-1, operator’s cab – measurement point) are given in Fig. 15. PROTECTOR was implemented for the first time in 2005 in the opencast mine Kolubara Field D. A substantial growth of the number of injuries in 2005 ...
    ... t estimation proposed in this study was Fig. 13. Working environments parameters overview at Field D open pit. Fig. 14. Evaluation overview of harmful parameters at working environments at Field D open pit. N. Lilić et al. / Engineering Applications of Artificial Intelligence 23 (2010) 453–462460 ...

  • 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

  • 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

  • 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
    ... Robertson AHEF, Mountrakis D (eds) Tectonic Development of the Eastern Mediterranean Region. Geological Society, London, Special Publications, vol. 260, pp 155178 Karamata S, Krstić B (1996) Terranes of the Eastern Serbia Carpatho- Balkanides. In: Knežević-Djordjević V, Krstić B (eds) Terranes of ...
    ... 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 _ ...
    ... Valjevo (Fig. 1). The area is part of the northern rim of the Maljen ophiolitic massif, located in the Western Belt of the Vardar Zone (Karamata and Krstić 1996; Karamata 2006). The wide territory is characterized by a complex morphology and is distinguished by two areas: the plain of the tertiary ...

  • 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
    ... dolomite crystals (facies C in this study); d) Furthermore these occasional flooding lower salinity and pH allowing direct precipitation of the autigenic sepiolite from the water column (facies D in this study). Note that processes described in c) and d) can be coeval. N. Andrić-Tomašević et ...
    ... early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia) N. Andrić-Tomašević a,b,*, V. Simić a, O. Mandic c, D. Životić a, M. Suárez d, E. García-Romero e a University of Belgrade, Faculty of Mining and Geology, 11000 Belgrade, Serbia b Department of Geology, University ...
    ... the mixture of detrital grains of different composition and size in smectite mass and frustules of diatom algae (Dia); d-g) authigenic smectite of different shapes and particle sizes: d) radial smectite crystallites filling a cavity; e) smectite crystallites generally perpendicular to detrital grains ...

  • Low-temperature phase transition and magnetic properties of K3YbSi2O7

    Predrag Dabić, Volker Kahlenberg, Biljana Krüger, Marko Rodić, Sabina Kovač, Jovan Blanuša, Zvonko Jagličić, Ljiljana Karanović, Václav Petříček, Aleksandar Kremenović (2021)
    alkalni silikati elemenata retkih zemalja, fazni prelazi, magnetne karakteristike, razdvajanje kristalnog polja, silikati lantanica

  • 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

  • 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

  • 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

  • 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)
    ... and state of activity Region Type of movement State of activity Active Dormant Reactivated Stabilized Suspended Abandone d Total W e s te rn a n d C e n tr a l S e rb ia Slides 740 16 195 11 458 6 1426 Slides/flows 43 15 5 72 135 Rockfalls 13 7 2 13 35 Rockfalls/slides ...
    ... movement and types of material involved Region Type of movement Type of material Anthropogenic Debris Rock Soil Complex Total W e s te rn a n d C e n tr a l S e rb ia Slides 10 681 3 710 26 1430 Slides/flows 92 40 3 135 Rockfalls 2 18 9 1 6 36 Rockfalls/slides 1 31 2 9 3 46 ...
    ... available as an open access data. BEWARE project portal is available at http://geoliss.mre.gov.rs/beware/. REFERENCES Abolmasov B., Damjanović D., Marjanović M., Stanković R., Nikolić V., Nedeljković S., Petrović Ž. 2017. Project BEWARE - Landslides Post-disaster Relief Activities for Local ...