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Упит dcterms_subject_txt:hirdoelektrana „Đerdap 1“

4955 items

  • Hydrogeochemical distribution of Ca and Mg in groundwater in Serbia

    Petar Papić, Jovana Milosavljević, Marina Ćuk, Rastko Petrović (2014)

  • The Nooj System as Module within an Integrated Language Processing Environment

    Ranka Stanković, Duško Vitas, Cvetana Krstev (2008)
    NooJ, electronic dictionary, lexical resources
    ... lemmas that can not be distinguished. That is the case, for instance, with the double entry cyelo,N300 that represents both (brow:1, forehead:1) and (cello:1, violoncello:1). By adding the information obtained from the wordnet hypernym/hyponym relations these two entries can be distinguished: for ...
    ... wordnet, Fellbaum 1998) abstraction:6 attribute:2 property:3 sound property:1 sound:1 can yield the addition of appropriate semantic marks to the entry glas 'voice' (hyponym of 'sound:1’): glas,N16+Snd+SndProp+Prop+Attr+Abstr. Depending on the application the depth ...
    ... language processing environment Ranka Stanković, ranka@rgf.bg.ac.yu Duško Vitas, vitas@matf.bg.ac.yu Cvetana Krstev, cvetena@matf.bg.ac.yu 1. Introduction In this paper we describe the main structure and possible applications of one integrated environment for linguistic research that contains ...

  • 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
    ... registered every seven days during the period from January 1 to December 31 (Table 2). Figure 7 shows individual well discharges recorded at Šumice during the one-year period. Figure 7. Registered individual well discharges, January 1 to December 31, 2009 The individual well discharges ...
    ... (January 1 to December 31, 2009). Figure 9 is a parallel representation of the total capacity of Šumice and the registered piezometric levels in the observation wells. Figure 9. Total capacity of the groundwater source at Šumice and piezometric levels in observation wells (January 1 to December ...
    ... population. The study area is situated in the southern part of the Pannonian Basin, which is a lowland that occupies the north of Serbia (Figure 1). The City of Kikinda extends over an area of 13.5 km2 in the spacious Banat Plain, where the highest elevation is 83 m and the lowest 76 m. Water supply ...

  • Novi model za postizanje optimalne proizvodnje na naftnom polju Amal

    Elnori Elmabrouk Ali Elhaddad (2015-04-16)
    Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...
    nafta, proizvodnja, optimizacija, Amal, Libija
    ... Predlog rešenja Rad kompresora 1 Uvesti adekvatno održavanje Pothlađivanje bušotine usled utiskivanja gasa 1 Utiskivanje manje količine gasa pod nižim pritiskom 2 Dozirati inhibitor protiv taloženja parafina ako je potrebno Povećana proizvodnja slojne vode 1 Zatvaranje postojećih perforacija ...
    ... 277:622.313(612) 622.323 665.6/.62(612)(043.3) Sadržaj 1. Uvod 1 2. Proizvodnja nafte u Libiji 4 2.1. Istorijat i osnovne karakteristike 4 2.2. Rezerve nafte ...
    ... bušotina u gas liftu 75 7. Zaključak 80 8. Literatura 84 Biografija 98 1 1. UVOD Nafta je predstavljala jedan od glavnih energenata u prošlom veku, a dominantan značaj imaće i u prvoj polovini ovog veka (Auty, 2001; Davis ...

  • Opremanje bušotine X zavojnom pumpom

    Milan Filipović (2024)
    Ovaj rad se bavi osnovnim pojmovima i karakteristikama zavojnih pumpi.Prikazan je sklop zavojnih pumpi i njena prateća oprema. Objašnjen je princip rada zavojnih pumpi kao i uloga svakog mašinskog elementa koji se nalazi u pumpi. Razmotrene su prednosti i nedostaci primene ovih primarnih mehaničkih metoda eksploatacije ugljovodonika. Dat je uvid u inovativna rešenja problematike primene zavojnih pumpi. Na konkretnom primeru bušotine X su prikazani problemi kao i rešenja primene ovih primarnih mehaničkih metoda u praksi. Napravljena je detaljna analiza ...
    zavojne pumpe, oprema, primarne mehaničke metode, ugljovodonici, analiza rada
    ... karakteristika statora, dok pritisak zavisi od dužine pumpe (Zelić, 2006). Na slici 1 je prikazano radno kolo zavojne pumpe u preseku. Rotor Stator Pr = Korak rotora Ps = Korak statora Ps =2Pr Slika 1 — Radno kolo zavojne pumpe u preseku (Zelić, 2006) Stator je izgrađen od elastomera ...
    ... n — broj obrtaja [Ž] t — temperatura |"C| H — viskoznost [mPa * s| Z —broj stepeni pumpanja 4py — kritični pritisak [MPa] 1--— p,ps# Ap OO .= .9>0 1-o —0.015(Ap-Ap,) , Ap> Ap, Q.6) n,- zapreminskhi faktor efikasnosti a – faktor materijala statora p - faktor geometrije statora ...
    ... 01.2014. godine. Perforirani interval bušotine se nalazi na dubini u intervalu od 807 do 810 metara. Opšti podaci o bušotini su dati u tabeli 1. Tabela 1 Opšti podaci Opšti podaci Dinamički nivo (m) 541 Fritisak na kezingu (bar) 9 Fritisak na tubingu (bar) 10,2 WWater cut (%) 80 Temperatura ...

  • Novi model za postizanje optimalne proizvodnje na naftnom polju Amal

    Elnori Elmabrouk Ali Elhaddad (2015-04-16)
    Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...
    nafta, proizvodnja, optimizacija, Amal, Libija
    ... Predlog rešenja Rad kompresora 1 Uvesti adekvatno održavanje Pothlađivanje bušotine usled utiskivanja gasa 1 Utiskivanje manje količine gasa pod nižim pritiskom 2 Dozirati inhibitor protiv taloženja parafina ako je potrebno Povećana proizvodnja slojne vode 1 Zatvaranje postojećih perforacija ...
    ... 277:622.313(612) 622.323 665.6/.62(612)(043.3) Sadržaj 1. Uvod 1 2. Proizvodnja nafte u Libiji 4 2.1. Istorijat i osnovne karakteristike 4 2.2. Rezerve nafte ...
    ... bušotina u gas liftu 75 7. Zaključak 80 8. Literatura 84 Biografija 98 1 1. UVOD Nafta je predstavljala jedan od glavnih energenata u prošlom veku, a dominantan značaj imaće i u prvoj polovini ovog veka (Auty, 2001; Davis ...

  • Understanding partitioning of deformation in highly arcuate orogenic systems: Inferences from the evolution of the Serbian Carpathians

    Nemanja Krstekanić, Liviu Matenco, Marinko Toljić, Oleg Mandić, Uroš Stojadinović, Ernst Willingshofer (2020)
    orogeneza, oroklini, višesmerna ekstenzija, transkurentna kretanja, Srpski Karpati
    ... calculations. We have used the WinTensor software (Delvaux and Sperner, 2003) to calculate and optimise reduced paleostress tensors (Figs. A.1, A.2 and Table A.1 of the Supplementary Appendix) by following a standard inversion approach with confidence criterion (e.g., Angelier, 1994; Angelier and Goguel ...
    ... E-W oriented strike-slip faults belonging to the first deformation event (e.g., structures 1 and 3 in Fig. 7), such as observed in Upper Jurassic lime- stones of the Lower Getic sub-unit (site Go1, structure 1 Figs. 7 and 9g). In this site, E-W oriented normal faults create a fault gauge breccia that ...
    ... OK, pp. 1–34. Cifelli, F., Mattei, M., Della Seta, M., 2008. Calabrian Arc oroclinal bending: the role of subduction. Tectonics 27, TC5001. https://doi.org/10.1029/2008TC002272. Csontos, L., 1995. Cenozoic tectonic evolution of the Intra-Carpathian area: a review. Acta Vulcanol. 7, 1–13. Csontos ...

  • Organoselenium functionalized oxacycles as ligands in some trans-palladium(II) complexes: biological evaluation and interaction with small biomolecules

    I. Raković, D. Ćoćić, O. Milošević-Djordjević, I. Radojević, M. N. Živanović, K. Virijević, J. Pavić, J. Tubić Vukajlović, A. Marković, J. S. Marjanović, M. D. Kostić, P. Čanović, A. Mijatović, V. M. Divac (2023)
    In this article, the biological evaluation and interaction of three selenium-based trans-palladium complexes (Pd–Se1, Pd–Se2, and Pd–Se3) with small biomolecules were performed. The UV–Vis kinetic studies on substitution reaction of synthesized complexes with selected biologically important N- and S-bonding ligands (LCys, GSH, L-Met, 50-GMP, L-His) has emphasized greater affinity of sulphur-based ligands for complex-binding, while the general order of the reactivity was L-Cys > GSH > L-Met > 50-GMP > L-His. The complex reactivity toward small biomolecules is influenced ...
    Materials Chemistry, Physical and Theoretical Chemistry

  • The Flow Conditions in the Epikarst Zone of a Karst Aquifer. Case Study: Suva planina Mt., East Serbia

    Branislav Petrović (2022)
    The epikarst as a part of the karst aquifer represents a complex point of contact and mixing of unconsolidated material from the terrain surface, carbonate rocks altered by “corrosive” water, flora and fauna (and remains of), which is partially saturated with groundwater. Recharge of karst aquifers, usually, occurs via the unsaturated zone which uppermost part could be epikarst zone. Significant amounts of (plant accessible) water, and other solutes and particles, can be stored in this zone for extended periods ...
    epikarst, tracer test, shallow cave, Suva Planina Mt., Serbia

  • Geotechnical effects of municipal solid waste destruction with different compaction methods

    Jovana M Janković Pantić, Dragoslav R Rakić, Irena G Basarić Ikodinović, Tina D Đurić, Gordana Hadži-Niković (2022)
    Disposal of waste in municipal solid waste landfills is the only way of waste disposal in Serbia, with daily compaction and covering with soil material. Due to less space for the construction of new landfills, it is necessary to use their maximum capacity. Well-compacted municipal solid waste takes up less volume and enables safer storage, so it is useful to previously determine the compaction parameters in the laboratory: maximum dry unit weight (γdmax) and optimal water content (wopt). In ...
    komunalni otpad, zbijanje, Proktorov opit, malj sa šiljcima

  • Challenges of Energy Transition in the Individual Heating Sector

    Boban Pavlović, Dejan Ivezić, Marija Živković (2022)
    U radu su prikazani rezultati istraživanja i ankete koja je sprovedena 2020. godine u domaćinstvima sa individualnim sistemima grejanja u Srbiji. Cilj ankete je bio da se sagleda stanje individualnih sistema grejanja, ali i stavovi vlasnika sistema vezano za energetsku tranziciju. Rezultati ukazuju na zastarelost sistema grejanja, nisku efikasnost, nedovoljna ulaganja u primenu mera energetske efikasnosti i nedostatak finansijskih sredstava za ulaganje u održivo grejanje. Osnovni prioriteti kod izbora načina grejanja jesu troškovi kupovine sistema i troškovi energenta, dok ...
    Energetska tranzicija, Individualni sistemi grejanja, Stavovi domaćinstava, Anketa, Srbija

  • Influence of Post-Synthesis Treatments on the Properties of Brushite/Monetite Powders

    Željko Radovanović, Lidija Radovanović, Aleksandar Kremenović, Đorđe Janaćković, Rada Petrović (2022)
    Dicalcium phosphate (DP) materials, of which brushite and monetite were the most known, have been intensively studied for several decades because of excellent resorptive and osteoconductive properties that can satisfy the requirements needed for various medical applications, such as bone cements, coatings of metallic implants and bone grafts ...

  • Effects of bentonite binder dosage on the properties of green limestone pellets

    Vladimir Jovanović, Dinko Knežević, Živko Sekulić, Milan Kragović, Jovica Stojanović, Slavica Mihajlović, Dragana Nišić, Dragan Radulović, Branislav Ivošević, Milan Petrov (2016)
    This paper presents the results of tests carried out to determine how the dosage of bentonite added as binder, affects the properties of green pellets made of the limestone fines that originate from Lithothamnium limestone processing. Bentonite was added to limestone in different mass fractions (1, 2.5, 5 and 10%), whereas all the other parameters of the pelletizing process remained constant. The aim of pelletizing was to consolidate limestone fines and form mechanically stable pellets, provided that all the ...
    Lithothamnium limestone, bentonite, pelletizing, pelletizing plate, green pellet testing

  • In vitro and in silico study of the biological activity of tetradentate Schiff base copper(II) complexes with ethylenediamine-bridge

    Aleksandar Mijatović, Nevenka Gligorijević, Dušan Ćoćić, Snežana Spasić, Aleksandar Lolić, Sandra Aranđelović, Milan Nikolić, Rada Baošić (2023)
    The biological activity of six structurally similar tetradentate Schiff base copper(II) complexes, namely [Cu(ethylenediamine-bis-acetylacetonate)] (CuAA) and five derivatives where two methyl groups are replaced by phenyl, (CuPP), CF3 (CuTT) or by mixed groups CH3/CF3 (CuAT), Ph/CF3 (CuPT), and Ph/CH3 (CuAP) has been investigated. The set of antioxidant assays was performed, and the results were expressed as IC50 and EC50 values. The series of complexes showed interesting bioactivity and were investigated for the determination of antioxidant, antifungal, antimicrobial, and cytotoxic ...
    Inorganic Chemistry, Biochemistry

  • Adsorption and Polymerization of Aniline on Cu(II)-Montmorillonite:  Vibrational Spectroscopy and ab Initio Calculation

    M. Ilić, E. Koglin, A. Pohlmeier, H. D. Narres, M. J. Schwuger (2000)
    Batch adsorption experiments in the presence of oxygen were performed to study the interlayer reactions of aniline on Cu(II)-montmorillonite in aqueous solutions. At concentrations below a critical value of CC ) 2.6 mmol dm-3 only a colored Cu(II)-aniline complex is formed, characterized by a stability constant of log(Kassoc/dm3 mol-1) ) 1.5. At concentrations beyond Cc aniline polymerizes yielding a dark brown product, which is identified by two vibrational spectroscopy techniques, attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy and ...
    Анилин, адсорпција, полимеризација, Cu(II)-Монтморилонит, ФТИР, аб инитио прорачун

  • Assessment of spa mineral water quality from Vrnjačka Banja, Serbia: geochemical, bacteriological, and health risk aspects

    Nebojša Đ. Pantelić, Simona Jaćimović, Jana Štrbački, Danijela B. Milovanović, Biljana P. Dojčinović, Aleksandar Ž. Kostić (2019)
    The goal of this study is to evaluate the quality of seven natural mineral water sources in the Vrnjačka Banja area used in the treatment of various diseases. The 24 macro- and microelements were determined by inductively coupled plasma optical emission spectrometry (ICP-OES). The results show that element content was within allowed limits of concentration, except for B, As, and Se. The evaluated content of these elements can be associated with geological and anthropogenic factors. The sample S6 contains ...
    Management, Monitoring, Policy and Law, Pollution, General Environmental Science, General Medicine

  • Optimizacija dužine strele rotornih bagera u funkciji stabilnosti kosina i efektivnosti rada na površinskim kopovima lignita Srbije

    Branko M. Petrović (2016-07-12)
    Rotorni bageri su mašine koje se u današnje vreme najviše primenjuju uprocesu masovne eksploatacije uglja zahvaljujući, pre svega, nizu tehničkoeksploatacionihprednosti u odnosu na druge vrste bagera. Raznovrsnirudarsko-tehnički zahtevi otkopavanja doprineli su razvoju nekoliko tipova ovihmašina, tako da svaki od njih ima svoje prednosti i nedostatke u odnosu nadrugi tip.Predmet istraživanja u disertaciji odnosi se na izbor optimalnekonstrukcije strele bagera i njene usaglašenosti sa uslovima radne sredine kojiće vladati na površinskim kopovima lignita Srbije, imajući u vidu složene usloveeksploatacije (velika ...
    površinski kop, parametri bloka, kapacitet, rotorni bager, strelabagera, geomehanika, stabilnost kosina, ekonomija
    ... svojstva zastupljenih geoloških slojeva prikazani su u Tabeli 4.2. Red 62 W E Red 103 W E Stub 63 S N Stub 89 S N 1 1 1 1 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 5 5 5 5 6 6 6 6 82 Tabela 4.2. - Fizičko-mehanička ...
    ... 0.30 0.40 0.50 0.60 0.70 19 94 19 95 19 96 19 97 19 98 19 99 2 0 0 0 2 0 0 1 2 0 0 2 2 0 0 3 2 0 0 4 2 0 0 5 20 06 20 07 2 0 0 8 20 09 2 0 1 0 2 0 1 1 2 0 1 2 2 0 1 3 ηt ; ηq godine vremensko iskori{}enje kapacitativno iskori{}enje 143 ...
    ... 5.47 1 5 4.93 65.53222 1.39 3.89 5.39 2 5 9.85 66.19788 1.34 3.80 5.29 3 5 14.78 66.86666 1.29 3.69 5.16 4 5 19.70 67.53775 1.26 3.56 4.99 5 5 24.63 68.21152 1.22 3.41 4.79 6 5+1 7.96 69.86218 1.19 3.22 4.60 7 5+1 12.07 70.52558 1.16 3.00 4.31 8 5+1 16.18 71.19101 1.13 2.72 3.98 9 5+1 20.27 ...

  • Tektonika terena okoline Aleksinca

    Miladin TANASKOVIĆ (1986)

  • Pegmatiti S.F.R. Jugoslavije

    Dragoslav Nikolić (1963)
    Pegmatiti, Jugoslavija

  • Tercijarne ribe Srbije

    Jelena Anđelković (1970)
    Tercijar, Srbija