Претрага

Упит dcterms_creator_txt:M. D. Kostić

1093 items

  • Proračun recirkulacionih pumpi u postrojenju za odsumporavanje dimnih gasova ,,TENT B"

    Tomislav Trpković (2024)
    Predmet ovog rada baziraće se na proračunu i usvajanju mašinskih instalacija potrebnih za nesmetano funkcionisanje sistema dve međusobno povezane celine Absorber - Pumpna stanica, preko FRP ( Fiberglass Reinforced Plastic) cevovoda kojim se odvija transport suspenzije krečnjaka neophodnog u samom procesu odsumporavanja dimnih gasova. Pored tehničkog opisa same tehnologije koja uključuje tri objekta: Absorber, Pumpna Stanica i cevovod, glavni deo rada odnosiće se na proračun i usvajanje mašinskih instalacija koji uključuju recirkulacione radijalne centrifugalne pumpe i cevovode kojima ...
    postrojenje za odsumporavanje dimnih gasova, termoelektrana, pumpna stanica, FRP cevovod, Absorber, transport suspenzije gipsa, prirubnica, ventil, potisni cevovod, usisni cevovod
    ... 0 D D 0 0 epovratna klapna | J J J J J J J J J J |Leptir ventil D.24 || D.2 D.O || D.2 O .0 || D.2 .0 || D.2 .0 |Odvajač nečistoće 10 0 D.O D.O | D.O0 _O .0 | D.O .0 0 D0.O0 0 erač protoka 10 |D D D D |D |D D D |D |D |Koeficijent otpora (Ukupan) |Ukupno .1 |Ukupno |5.7 |Ukupno M.1 |Ukupno 5 ...
    ... statička visina dizanja Zd m 21.5 usisna visina Zs m 8 statička visina dizanja Zstat m 13.5 dužina cevovoda L m 38.2 Koleno (45 stepeni) 0.35 1 |D.35 Koleno (90 stepeni) 0.45 12 |b.4. T komad D0.4 D } T komad 1.3 5 |6.5 T komad 1.5 D |D T komad 1 D |D Pregradni ventil 0.17 |} |O ...
    ... visina dizanja Zd m 18.5 Usisna visina Zs m 8 Statička visina dizanja Zstat m 10.5 Dužina cevovoda L m 34 Koleno (45 stepeni) 0.35 1 |D.35 Koleno (90 stepeni) 0.45 12 |b.4. T komad pD.4 '} |D T komad 1.3 5 |6.5 T komad 1.5 '} |D T komad 1 D } Pregradni ventil D.17 O |O Nepovratni ...

  • Threshold-induced correlations in the Random Field Ising Model

    Sanja Janićević, Dragutin Jovković, Lasse Laurson, Đorđe Spasojević (2018)
    Multidisciplinary
    ... 6106 (1999). 9. Spasojević, D., Janićević, S. & Knežević, M. Numerical Evidence for Critical Behavior of the Two-Dimensional Nonequilibrium Zero-Temperature Random Field Ising Model. Phys. Rev. Lett. 106, 175701 (2011). 10. Spasojević, D., Janićević, S. & Knežević, M. Avalanche Distributions in the ...
    ... Davidsen, J. & Baiesi, M. Self-similar a�ershock rates. Phys. Rev. E 94, 022314 (2016). 20. Lombardi, F., Herrmann, H. J., Plenz, D. & de Arcangelis, L. Temporal correlations in neuronal avalanche occurrence. Sci. Rep 6, 24690 (2016). 21. Mäkinen, T., Miksic, A., Ovaska, M. & Alava, M. J. Avalanches in ...
    ... 59, 6106 (1999). 9. Spasojevic, D., Jani¢evic, S. & Knezevic, M. Numerical Evidence for Critical Behavior of the Two-Dimensional Nonequilibrium Zero-Temperature Random Field Ising Model. Phys. Rev. Lett. 106, 175701 (2011). 10. Spasojevi¢, D., Janicevic, S. & KnezZevi¢, M. Avalanche Distributions in the ...

  • Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja

    Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Filip Miletić, Ivan Janković (2019)
    Hidraulični bageri primenjuju se u različitim oblastima privrede a najzastupljeniji su u građevinarstvu i rudarstvu. Na površinskim kopovima sa kontinualnim sistemima, klasifikuju kao pomoćna mehanizacija a na površinskim kopovima sa diskontinualnim sistemima, kao osnovna mehanizacija. Kako je u oba slučaja njihova primena neizostavna, važno je izvršiti adekvatnu analizu postojećih podataka, u cilju optimizacije izbora tipa hidrauličnog bagera u odnosu na uslove rada datog površinskog kopa. U radu su opisane različite višekriterijumske metode koje su korišćene za analizu hidrauličnih bagera. ...
    višekriterijumske metode, površinski kop uglja, pomoćna mehanizacija, hidraulični bager
    ... 1, 0, ks ks ks ako je c c f ako je c c     1, , 1,2,..., ( 1) m k k s ksd d s n m m      (32) 1, 0, ks ks ks ako je d d g ako je d d     Na osnovu matrice dominacije slaganja i neslaganja, formira se agregatna matrica dominacije indeksa ...
    ... (29) max ksmax za D = j D kj sjks ks sj kj j J kj sj v v j d x xv v       (30) U sledećem koraku se određuju matrice domina- cije saglasnosti fks i nesaglasnosti gks koje mogu uzi- mati vrednosti od 0 do 1, 1, , 1,2,..., ( 1) m k k s ksc c s n m m      (31) 1 ...
    ... UDC: 622.271.5 PREDRAG D. JOVANČIĆ, Univerzitet u Beogradu, 621.879.45 Rudarsko-geološki fakultet, Beograd DOI:10.5937/tehnika1903369D DRAGAN M. IGNJATOVIĆ, Univerzitet u Beogradu, Rudarsko-geološki fakultet, Beograd FILIP M. MILETIĆ, Univerzitet u Beogradu ...

  • Clockwise vertical-axis rotation in the West Vardar zone of Serbia: Tectonic implications

    Vesna Lesić, Emo Márton, Violeta Gajić, Dragana Jovanović, Vesna Cvetkov (2018)
    The Vardar-Tethyan mega-suture between the Eurasian and Adria (Gondwana) margins comprises remnants of oceanic lithosphere of Neotethys and distal parts of the adjacent continental margins including unconformable Late Cretaceous sedimentary cover and Cenozoic igneous rocks of post-obduction age. This study provides kinematic constraints for displacements and rotations affecting the Serbian part of the West Vardar and Jadar-Kopaonik units after the closure of the Neotethyan (= Sava) Ocean. The targets of the paleomagnetic research were Late Cretaceous sediments representing an ...
    Paleomagnetism, Clockwise rotation, Dinarides, West Vardar zone
    ... y ei th er sc at te re d d ir ec ti o n s o r b ad d em ag n et iz at io n cu rv es . * L ef t o u t fr o m te ct o n ic in te rp re ta ti o n d u e to cl o se n es s to th e d ir ec ti o n o f p re se n t E ar th m ag n et ic fi el d o n th e sa m p li n g ar ea . M ag n et ic re ad in g s ...
    ... s fo r th e fi el d o ri en ta ti o n o f th e co re s w er e co rr ec te d u si n g IG R F -1 2 In te rn at io n al G eo m ag n et ic R ef er en ce F ie ld m o d el (T h éb au lt et al . 2 0 1 5 ). T h e ag e d et er m in at io n w as d o n e b y M il en a D u n či ć b as ed o n w el l p ...
    ... th e re su lt s o f p ri n ci p al co m p o n en t an al y si s (K ir sc h v in k 1 9 8 0 ). K ey : L at . N an d L o n . E : g eo g ra p h ic co o rd in at es (W G S 8 4 ), n /n o : n u m b er o f u se d /c o ll ec te d sa m p le s; D , I (D c , I c ): d ec li n at io n , in cl in at io n b ef ...

  • Хидротермалне промене у издвојеним стратиграфским јединицама у бушотини јужно од Бора

    Павле Јовичић (2024)
    Анализом уступљених узорака из истражне бушотине јужно од Бора, од стране компаније Serbia Zijin Mining, утврђене су хидротермалне промене (алтерације) које прате стратиграфске чланове набушене самом бушотином. Установљене алтерације директно осликавају класично развиће порфирског Cu система, при чему је указано на њихову повезаност са минерализацијом, као и на потенцијалност самог истражног простора којем изабрана бушотина припада.
    Бор, хидротермалне промене, порфир

  • Mikroelementi u uljnim šejlovima Aleksinca i njihov uticaj na životnu sredinu

    Nikoleta Aleksić (2021)
    ... Horvat, M., Nečemer, M., ... & Milačič, R. (2019). Potentially toxic elements in muscle tissue of different fish species from the Sava River and risk assessment for consumers. Science of the Total Environment, 650, 958-969. [3] Kostić, J., Kolarević, S., Kračun-Kolarević, M., Aborgiba, M., Gačić, ...
    ... 2,5 3,0 K d p o v rs in sk a v o d a /K d p o d ze m n a v o d a Alahlor Atrazin Trifluralin 0,01 mg/l0,05 mg/l0,5 mg/l Voda VIII Memorijalni naučni skup iz zaštite životne sredine „Docent dr Milena Dalmacija“, 2021. V-01 Literatura [1] Liu, P., Zhu, D., Zhang, H. ...
    ... [1] Raičević V., Lalević B., Dabić D., Kiković D., Jovanović Lj., Nikšić M. (2007). Mikroorganizmi u bioremedijaciji zemljišta i voda. Zaštita materijala, 48(2), 47-52. [2] Beškovski V., Gojgić-Cvijović G., Milić J., Ilić M., Miletić S., Jovanćićević B., Vrvić M (2012). Bioremedijacija zemljišta ...

  • Determining the Availability of Continuous Systems at Open Pits Applying Fuzzy Logic

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović (2022)
    This work presents a model for determining the availability of continuous systems at open pits by applying fuzzy logic and fuzzy inference systems. The applied model was formed by the synthesis of independent partial indicators of availability. The model is based on an expert system for assessing the availability of continuous mining systems. The availability of the system, as a complex state parameter, is decomposed into the partial indicators, reliability, and convenience of maintenance, and the fuzzy compositions, used ...
    системи, континуални систем експоатације, површински коп, рударство, расположивост, фази логика, max–min композиција, min–max композиција

  • Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention

    Milica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović (2023)
    Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...
    Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol Injection

  • Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite

    Philippe Colomban, Aleksandar Kremenović (2020)
    Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...
    asbestos, CMC, Corsica, fiber, pottery
    ... O j - R a m a n In te ns it y Fe K /\ Ti Mn Ni 0 0 5000 10000 O 250 500 750 1000 1250 1500 Energy / eV Wavenumber / cm” Figure A4. Representative EDS (left) and Raman (right) spectra recorded on some spots of sample d (see Figure 1). References e o z a m s m s n 10. 11 ...
    ... Gastaldi, D.; Compagnoni, R. Micro-Raman spectroscopy for a quick and reliable identification of serpentine minerals from ultramarics. Eur. J. Mineral. 2008, 18, 319-329. [CrossRef] Petriglieri, J.R.; Salvioli-Mariani, E.; Mantovani, L.; Tribaudino, M.; Lottici, P.P.; Laporte-Magoni, C.; Bersani, D. ...
    ... 3800 607 500 1000 1500 >~ P 2165 w | |M + = c 2504 2613 2680 6 2840 E o Ć ioo 2000 2500 3000 3000 3200 3400 3600 3800 Wavenumber / cm-1 (B) Figure 9. Representative Raman spectra recorded in the 2900-3950 cm -! range on samples a and d (A, above, see Figure 1). Examples of un ...

  • Polyhedral characteristics of the cosalite-type crystal structures

    Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus (2019)
    kristalna struktura, kozalit, poliedarske karakteristike

  • Ostvarivanje dobiti pri uvođenju sistema agregatnih zamena na osnovnoj rudarskoj mehanizaciji površinskih kopova EPS

    Predrag Jovančić, Ignjatović Dragan, Đenadić Stevan (2021)
    Jedan od osnovnih zadataka na površinskim kopovima uglja je ostvarivanje zadovoljavajućeg vremenskog i kapacitetnog iskorišćenja kontinualnih sistema. Da bi se to postiglo, neophodno je izvršiti izmene u postojećoj strategiji održavanja. Preduslov je uvođenje agregatne zamene vitalnih delova na rudarskim mašinama. Benefiti su višestruki. Očekivani rezultati ovakvog pristupa su: smanjenje zastoja i povećanje vremena rada; direktne materijalne uštede; bolja organizacija rada; racionalizaciju radioničkih i magacinskih kapaciteta; povećanje vrednosti mašina. Da bi se uvela agregatna zamena neophodne su investicije za nabavku ...
    agregatne zamene, održavanje, mehanizacija, Benefit Cost analiza

  • Lower Berriasian ammonites from Dedina (Golubac Mountains, eastern Serbia) and their biostratigraphic implication

    Zdenek Vasícek , Dragoman Rabrenović, Petr Skupien, Barbara Radulović (2023)
    Ammonites, Taxonomy, Lower Berriasian, Getic, Northern Tethys, Serbia
    ... ventral view with the siphonal groove; layer 31. M, N, Hegaratella oxycostata (Mazenot, 1939), specimen SA/2 m; M, lateral view, N, ventral view; layer 2 m below the beginning of section. Scale bars: A, B, D, and E: 20 mm; C, F-N: 10 mm. 8 Z. Vašiček, D. Rabrenović, P. Skupien et al. interruption ...
    ... enschaftliche Klasse 114, 591—636. Vankova4, L. Elbra, T., Pruner, P., Vašiček, Z., Skupien, P., Rehakov4, D., Schnabl, P., Košta4k, M., Švabenicka4, L, Svobodov4, A., Bubik, M., Mazuch, M., Cižkov4, K., 'Kdyr, Š., 2019. Integrated stratigraphy and palaeoenvironment of the Berriasian peri-reefal ...
    ... of the Serbian Geographic Society 87 (2), 64 (in Serbian with English summary). Carević, L,, Taherpour-Khalil-Abad, M., Mirković, M., Jovanović, V., Mojtahedin, E., Vušković, D., 2018. Calpionellid biostratigraphy and microfacies of the Upper Tithonian pelagic carbonates in northeastern Serbia ...

  • The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia

    I. Kojic, J. Kus, D. Zivotic, K. Stojanovic (2021)
    ... 103283. Nytoft, H.P., Kildahl-Andersen, G., Lindström, S., Rise, F., Bechtel, A., Mitrović, D., Đoković, N., Životić, D., Stojanović, K., 2019. Organic Geochemistry 129, 14–23. Stojanović, K., Životić, D., 2013. International Journal of Coal Geology 107, 3–23. ...
    ... Lusatia I. Kojic, J. Kus, D. Zivotic, K. Stojanovic Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] The Potential of Biomarkers to Distinguish Lower and Middle Miocene Lignites from the Coal-Mining District of Lusatia | I. Kojic, J. Kus, D. Zivotic, K. Stojanovic ...
    ... comparison to Lower Miocene samples. References Bechtel, A., Sachsenhofer, R.F., Markic, M., Gratzer, R., Lücke, A., Püttmann, W., 2003. Organic Geochemistry 34, 1277–1298. Kus, J., Dolezych, M., Schneider, W., Hofmann, T., Visiné Rajczi, E., 2020. International Journal of Coal Geology 217 ...

  • Distribution of major and trace elements in the Kovin lignite (Serbia)

    Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović (2019)
    geochemical and mineralogical study was performed on lignite samples from the Upper Miocene Kovin deposit, hosting three coal seams. The Kovin lignite is characterized by high moisture content, medium to high ash yield, medium to high sulphur content and a relatively low gross and net calorific value. The mineralogical composition, and major and trace element contents were determined by X-ray diffraction, scanning electron microscopy with energy dispersive Xray spectroscopy (SEM-EDS) analyses, and inductively coupled plasma optical emission spectrometry (ICP-OES). ...
    General Earth and Planetary Sciences, General Environmental Science
    ... doi: 10.1016/j.coal.2012.01.015 ELECTRIC POWER SYSTEM OF SERBIA (EPS, 2018) ­ http://www.eps.rs (last ac­ cessed June 4, 2018). ERCEGOVAC, M., ŽIVOTIĆ, D. & KOSTIĆ, A. (2006): Genetic–Industrial Classifica­ tion of Brown Coals in Serbia.– International Journal of Coal Geology, 68, 39–56. ESKANAZY, G ...
    ... (albite) K-feldspar (orthoclase) Epidote Allanite (orhite) Zircon M M m m M m m m m M M m m m M m m M m M m M m Carbonates Calcite Siderite Dolomite Ankerite M M m m m M Phosphate Monazite m m M–major mineral (>1 vol.%); m–minor mineral (<1 vol.%) G eo lo g ia C ro a ti ca Geologia ...
    ... Content I seam II seam III seam Sulphides Pyrite Sphalerite Galena m m m m m Sulphate Gypsum/Anhydrite Barite M m M M m Oxides and hydroxides Limonite Hematite Rutile Ilmenite Mn-Fe oxides Mn hydroxides m M m m m m M m m m m M m m Silicates Quartz Opal/chalcedony Illite Smectite Mica (biotite ...

  • Megaklizišta u gornjem toku Drine od Foče do Višegrada i njihov uticaj na hidroenergetske objekte

    Sunarić Duško, Jevremović Dragutin, Lolin M. (2010)

  • Evropska politika i javno-privatno partnerstvo u oblasti energetske efikasnosti na lokalnom nivou

    Ivezić Dejan, Živković Marija, Gluščević M. (2011)

  • The effect of finite driving rate on avalanche distributions

    Sonja Radić, Sanja Janićević, Dragutin Jovković, Đorđe Spasojević (2021)
    Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear Physics

  • Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)

    Dušan Polomčić, Dragoljub Bajić, Jelena Zarić (2015)
    A groundwater flow model was developed to simulate groundwater extraction from the public water supply source of the City of Kikinda. The hydrodynamic model includes the municipal groundwater source of Kikinda (Šumice and the Jezero Well), but also an extended area where there are groundwater sources that provide water supply to three factories: (MSK, TM and LŽT - Kikinda). Hydrodynamic modeling, based on the numerical method of finite differences will show the groundwater balance of the sources in the ...
    Water supply, Aquifer, Flow, Groundwater regime, Numerical modeling, Particle tracking
    ... Polomčić, D., Bajić, D., Ristić-Vakanjac, V., Čokorilo, M., Drašković, D., Špadijer, S., Hydrodynamic Characteristics of the Water Supply Source „Peštan“ (Lazarevac, Serbia), Vodoprivreda, 261-263, Serbian Irrigation and Drainage Society, Belgrade, pp 55-68, 2013. 3. Đurić, D., Lukić, V., Soro ...
    ... Pušić, M., Vidović, D., Đurić, D., Boreli-Zdravković, Đ., Pollution Transport analysis in defining the Sanitary Protection Zones of Groundwater Sources in Alluvial Areas, Vodoprivreda, 264-266, Serbian Irrigation and Drainage Society, Belgrade, pp 203-218, 2013. 12. Pollock, D. W., User's Guide ...
    ... Šumice was 700-750 m and that of the Jezero Well 350 m. ACKNOWLEDGMENTS Our gratitude goes to the Ministry of Education, Science and Technological Development of the Republic of Serbia for financing projects OI-176022, TR-33039 and III-43004. REFERENCES 1. Hajdin, B., Polomčić, D., Stevanović, ...

  • Osnovi hidrogeologije

    Petar Dokmanović (2021)
    hidrogeologija, atmosferska voda, površinske vode, podzemne vode, vodni bilans, poroznost stena
    ... T = Kf x m (8.2.3.1) 65 O s n o v i h i d r o g e o l o g i j e gde je: T– transmisivnost (m2/s); K– koeficijent filtracije (m/s); H– debljina izdanske zone sa slobodnim nivoom PV (m) i m– debljina izdani sa nivoom PV pod pritiskom (m). Najr ...
    ... Beograd 82. Šestakov, V. M. & Orlov, M. S. (1984): Gidrogeologija, MGU, Moskva. 83. Todd D (1980): Groundwater Hydrology, John Willey and Sons, USA 84. Todd D. & Mays L. (2005): Groundwater hydrology (3-rd edition), Willey international edition, USA 85. Trivić B, Dimitrijević M (2014): Strukturna g ...
    ... određuje se preko sledećeg izraza: = s d m ρ V (6.7.5) gde su: ms– masa ispitivanog uzorka u suvom stanju (g); V– zapremina uzorka sa porama (cm3). Gustina stene u zasićenom stanju (ρz) odre đuje se preko sledećeg izraza: 52 O s n o v i h i d r o g e o l o g i j e = z z mρ V ...

  • Development of integrated fuzzy model for mine management optimization

    Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)
    fuzzy logika, višekriterijumsko odlučivanje, ocenjivanje eksperata
    ... following; equation: m i n m -1 m m m 1 1 1 S -Ž MLe|.2.MA, |Ž,D-> 552 d|| _—R — L — j=1 i=1 j=1 jel jcl je1 Mdj XOsj M i=l i=l i=1 Step 3. The degree of possibility of two triangular fuzzy numbers is deter- mined using; the fuzzy number comparison approach: V(M, > W)= sup |min (Jr, () ...
    ... minV(M > Mi). Summing; everything; up yields c (Aij)=minV (S; > %), k=1,2,...,m;k X i. Step 4. Weight priority vectors are defined as W!= (c' (4i),C(A>),...,“ (An)T) where A4;(i= 1,2,...,n). 1416 M. Čelebić, S. Bajić, D. Bajić et al. Step 5. The final weights are calculated applying; a matrix ...
    ... 199—249. Š| CHANG D. Y. (1996) Applications of the extent analysis method on fuzzy AHP, Rur. J. Oper. Res., 95, 649 655. “} ZnU K., Y. JING, D. CHANG (1999) A discussion on extent analysis method and applications of fuzzy AHP, Eur. J. Oper. Res., 116, 450 456. TOLGA FE., M. DEMIRCAN, C. KAHRAMAN ...