Претрага

Упит dcterms_subject_txt:raw material

345 items

  • Mineral and Thermal Waters of Serbia: Multivariate Statistical Approach to Hydrochemical Characterization

    Maja Todorović, Jana Štrbački, Marina Ćuk, Jakov Andrijašević, Jovana Šišović, Petar Papić (2016)

  • 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
    ... groundwater source of Šumice Based on the grain-size distribution of the water-bearing horizons, which also include the studied aquifer, the material of the water-bearing formation is represented by fine- and medium-grain sands (uniformity coefficient: Cu = d60/d10 = 2-3 mm with d50 = 0.1-0.3 ...

  • Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series

    Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić (2021)
    Underground mining engineers and planners in our country are faced with extremely difficult working conditions and a continuous shortage of money. Production disruptions are frequent and can sometimes last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. ...
    deformacije podgrade, lasersko skeniranje, višekanalna singularna spektralna analiza, prognoza, klasterisanje fuzzy vremenskih serija
    ... different approaches to obtaining future states of support deformation. Ding-Ping Xu et al. [1] compared the predictions from the rock–soil composite material model, where an analytic method, along with existing data from physical model tests, was applied to acquire results. Good consistency, both in terms ...
    ... different approaches to obtaining future states of support deformation. Ding-Ping Xu et al. [1] compared the predictions from the rock-soil composite material model, where an analytic method, along with existing data from physical model tests, was applied to acquire results. Good consistency, both in terms ...

  • Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides

    Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor (2019)
    Internal Dinarides, Drina-Ivanjica thrust sheet, Deformation history, K–Ar dating, Obduction, Structural analysis
    ... matrix accumulated in a deep basin formed ahead of advancing ophiolitic thrust sheet that comprises blocks of various size and lithology; and (2) material scraped off from the footwall of the ophiolite thrust (Adriatic units) (Bortolotti et al. 1996; Chiari et al. 2011). WNW-ESE trending.stretching ...
    ... compared to the 2 um fractions of the same samples (Fig. 6a). This implies that the finer fractions are probably less contaminated by inherited material than the coarser fractions, and consists of newly formed white mica crys- tals. Taking this into account, the likely range for the age of m ...

  • Моделирање утицаја одступања линије најмањех отпора од пројектоване на интензитет потреса од минирања

    Стефан Милановић (2024)
    Према дефиницији линија најмањег отпора представља најкраће растојање од центра минског пуњења до слободне површине. Oвим истраживањем представљен је утицај линије најмањег отпора, као и њеног одступања од пројектоване на интезитет потреса услед минирања. Проблем линије најмањег отпора је веома заступљен у пракси, где се занемарује изглед слободне површине, који може бити врло неправилан. Линију најмањег отпора је потребно мерити целом дужином минске бушотине према слободној површини, иако је у пракси случај да се мери најчешће као растојање од ...
    линија најмањег отпора, 3D модел, потреси услед минирања, минирање, слободна површина, метода раздвојених елемената

  • Evidence of Variscan and Alpine tectonics in the structural and thermochronological record of the central Serbo-Macedonian Massif (south-eastern Serbia)

    Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Richard Spikings, Andreas Wetzel (2016)
    General Earth and Planetary Sciences
    ... collision with Laurussia. Outcrop-scale evidence of the final stage D, Klectronic supplementary material The online version of this article (doi:10.1007/s00531-016-1380-6) contains supplementary material, which is available to authorized users. P< Milorad D. Antić m.antic('unibas.ch Institute ...
    ... gy An overview of the ' Ar/”Ar thermochronology method is given in online Appendix A together with a detailed descrip- tion of the analysed material and complete “ Ar/”Ar data. A brief overview of critical sample information is given in Table 1, while relevant “Ar/”Ar date spectra, K/Ca dia- ...

  • Age of the Jurassic hemipelagic sediments from the Ljubiš area (Zlatibor Mt., SW Serbia)

    Nikita Bragin, Nevenka Đerić (2020)
    Radiolaria, Dinarides, Jurassic, stratigraphy, Serbia
    ... and Middle Jurassic clasts are represented by red nodu- lar limestone and Bositra-limestone. GAWLICK et al. (2017) supposed that this turbidite material was derived from the Upper Triassic-Middle Jurassic sedimentary succession of the DIU, however, the Krš Gradac quarry contains only Late Triassic ...

  • Availability as a dimension of energy security in the Republic of Serbia

    Boban Pavlović, Dejan Ivezić (2016)
    There is a range of modern approaches and models in literature for the evaluation and determination of energy security, which are based on different parameters and indicators. For most of them, a common characteristic is emphasizing the avail ability of energy, as an important dimension for ensuring energy security. In this paper, concise overview of Serbian energy sectors is given and appropriate energy indicators are defined and determined. Selected indicators provide insight into the main components that characterize availability ...
    raspoloživost energije, energetski indikatori, energetska bezbednost
    ... the ration of resources and production (SS2). Resources are generally defined as concentrations of naturally occurring solid, liquid or gaseous material in or on the Earth’s crust in a form that makes economic extraction potential- ly feasible. Total resources include reserves, and hypothetical and ...

  • A hundred years of Milutin Milanković's climate change theory - geological implications

    Dejan Radivojević (2020)
    Миланковићева теорија циклуса објављена пре сто година је најважнија теорија у наукама које проучавају климу и имала је велики утицај на дисциплине које се баве Земљом. Ипак, његов рад је чекао више од педесет година да би добио потврду. Може се рећи да Миланковићев рад највећи утицај на геологију има у изради астрономске временске скале, подршци хипотези континенталног дрифта и палеоклиматологији. Добри резултати примене астрономске временске скале на неогене седименте иницирали су примену ове методе у мезозојским и у последње ...
    циклостратиграфија, астономска временска скала, геолошка временска скала, климатске промене, континентални дрифт
    ... Formation were dated and correlated to Newark Basin Triassic rocks to de- termine climate cycles age and timing logged in the rocks and represent the material geologic evidence of 405 kyr Milanković’s cycle (CALLIER, 2018). ATS based on Milanković’s forced stratigraphy, calibrated with palaeoclimatic forcing ...

  • 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
    ... the two margins was still open in Editorial handing: K. Saric. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s00015-018-0321-8) contains supplementary material, which is available to authorized users. & Vesna Lesić vlesic@drenik.net 1 Department of ...

  • Tehnologija izrade i opremanje magacina eksploziva za potrebe ležišta bakra

    Aleksandar Milojević (2024)
    Nakon radova otvaranja i početka eksploatacije, rudno telo bakra velikih rezervi zahteva i veliku količinu eksploziva da bi se ostvario zacrtan kapacitet. Samim tim, neophodno je izraditi funkcionalan magacin eksploziva koji će biti pristupačan svim horizontima i koji će moći da ispuni celokupni kapacitet svih horizonata. Obzirom da će se u magacinu skladištiti eksploziv, on mora ispunjavati specijalne uslove kako bi skladištenje bilo bezbedno. Neophodno je isprojektovati magacin tako da ispuni sve zahteve po pitanju količine i načina skladištenja eksploziva, ...
    podzemna eksploatacija, ležište bakra, magacin, eksploziv
    ... Dimenzije prostorije su 3x2,8 m, a debljina sloja torkret betona 0,25 m. X R—A —— ii Young's 5 lntact \ Initial Elastic Poisson's Failure Material m m Dilation |Piezo - |MatenalName |CoPor| glememt | Yype_ |MeđuM| Rato |_ Giterom | Tvpe | Compreššive | ipeak) |iresiduam | *(peak) | {residu"l)| ...
    ... | \ ~ NJ |__-- | \ i \ \ A _— f L=2.800 Angle=270.0"| j__A | _ ı — ij | || | Ć IA | \ iii \ SLC | i \ j X | | , L | i Ć | || i \ \ | Material |Beam Element| Stage — |Reinforcement |Reinforcement: | Reinforcement: Reinforcement: Reinforcement: | Concrete: LFomcrete: Youme's| linerName |Cake ...

  • Digital Library From A Domain Of Criminalistics As A Foundation For A Forensic Text Analysis

    Dalibor Vorkapić, Aleksandra Tomašević, Miljana Mladenović, Ranka Stanković, Nikola Vulović (2017)
    U ovom radu predstavljen je model koji omogućava prikupljanje, pripremu, opis metapodataka, upravljanje i eksploataciju, uključujući pretragu punog teksta dokumenata iz domena kriminalistike napisanih na srpskom jeziku. Predloženi pristup primenjuje se na veb portalu koji sakuplja različite tekstove nastale iz časopisa Akademije za kriminalistiku i policijske studije, Krivičnog zakona Srbije, konferencija „Tara“ i „Reiss“, kao i iz nekih doktorskih disertacija vezanih za ovu oblast istraživanje. Nakon obrade teksta, korpus koji sadrži preko 5500 stranica običnog teksta, kreiran je i ...
    Omeka, Wordnet, pretraga punog teksta, morfološka i semantička pretraga teksta, proširenje upita
    ... make the addressee suffer or feel guilt. Genuine suicide letters are short, typically less than 300 words in length. Extraneous or irrelevant material is often excluded from the text. Next forensic text type is death row statements. They either admit the crime, leaving the witness with an impression ...

  • Building learning capacity by blending different sources of knowledge

    Ivan Obradović, Ranka Stanković, Olivera Kitanović, Dalibor Vorkapić (2016)
    ... objective of the project is to produce course materials in several different languages, in various forms such as videos, audio streams and written material. In order to facilitate the use of these materials in a multilingual environment, a language support system is integrated into the BMP, consisting ...

  • Optimizacija parametara reza rotornog bagera pri otkopavanju materijala sa povećanom čvrstoćom

    Saša D. Bošković (2016-09-09)
    Otkopavanje materijala rotornim bagerom je veoma sloţen fiziĉko-mehaniĉki proces. Pokazatelji efektivnosti tog procesa zavise od velikog broja raznovrsnih ĉinilaca od kojih se posebno mogu istaći: fiziĉko-mehaniĉke karakteristike materijala koji se otkopava, reţim rada bagera i izbor tehnoloških parametara bloka, odreska i reza, geometrije vedrica i zuba itd. Poseban problem se javlja kod otkopavanja materijala povećane ĉvrstoće, što je ĉest sluĉaj na našim površinskim kopovima. Dimenzionisanje specifiĉne sile kopanja bagera prema manjim masama izuzetno ĉvrstog materijala je neracionalno i rešenje ...
    rotorni bager, parametri reza, otpor na kopanje, dinamika bagera, kapacitet, optimizacija, specifična potrošnja energije
    ... Mining of material by a bucket wheel excavator is a very complex physical physical-mechanical process. Indicators of the effectiveness of this process depends on a number of various factors, of which in particular may be emphasized: physical- mechanical characteristics of the material to be mined ...
    ... increased strength, which is often the case in our opencast mines. Sizing of excavator specific digging forces towards smaller masses of extremely hard material is irrational and a solution should be sought either in the excavation of these masses by other equipment or by optimization of bucket wheel excavator ...

  • Mineragenetske karakteristike i potencijalnostjuvelirskih mineralnih resursa leckog vulkanskog kompleksa

    Zoran Ž. Miladinović (2012-12-11)
    Jedan od najznačajnijih regiona u Srbiji, sa stanovišta potencijalnosti juvelirskih mneralnih resursa, predstavlja lecki vulkanski kompleks, tercijarne starosti i dominantno andezitskog sastava. Ovaj vulkanski kompleks površine preko 700km2 nalazi se u južnojSrbiji na prostoru imeđu Kuršumlije, Lebana i Medveđe.Prvi su pažnju na juvelirske mineralne sirovine ovog prostora obratili graditeljiJustinijane Prima-e (VI vek). Najintenzivnija istraživanja izvršena su u periodu 1980–1982. ali samo na malom prostoru krajnjeg jugoistočnog dela vulkanskog kompleksa.U Leckom vulkanskom kompleksu dominiraju andezitske stene i njihovi piroklastiti.Smatra se ...
    vulkanski kompleks, mineragenetske karakteristike, juvelirski mineralni resursi, nalazišta, potencijalnost, kvarc, ametist, ahat, kalcedon, jaspis, prognoza
    ... the gemstone raw material is verified through lapidary processing (gemstone cutting) and the production of jewelry. It has been established that the most adequate use of raw material is by using en cabochon cut, gliptography and mixed cut. The quality of the gemstone raw material is verified through ...
    ... through lapidary processing (gemstone cutting) and the production of jewelry. It has been established that the most adequate use of the raw material is by using en cabochon cut, gliptography and mixed cut. The gemstone deposits of the Lece volcanic complex are represented by hydrothermal – ...
    ... Graetsch H. A., Grünberg J. M., Microstructure of flint and other chert raw materials, Archaeometry, 2011, | DOI: 10.1111/j.1475-4754.2011.00610.x Graetsch H. A., Grünberg J. M., Microstructure of flint and other chert raw materials, Grupa autora, 1965: Osnovna geološka karta SFRJ 1:100 000, list ...

  • A Model for Determining Fuzzy Evaluations of Partial Indicators of Availability for High-Capacity Continuous Systems at Coal Open Pits Using a Neuro-Fuzzy Inference System

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović, Filip Miletić (2023)
    This paper presents a model for determining fuzzy evaluations of partial indicators of the availability of continuous systems at coal open pits using a neuro-fuzzy inference system. The system itself is a combination of fuzzy logic and artificial neural networks. The system availability is divided into partial indicators. By combining the fuzzy logic and artificial neural networks, a model is obtained that has the ability to learn and uses expert judgment for that learning. This paper deals with the ...
    системи, континуални системи експлоатације (роторни багер-транспортер-дробилично постројење), рударство, расположивост, меко рачунарство, фази логика, ANN, ANFIS

  • Kvartarni klastiti iz bušotine kod Aranđelovca (rasadnik Mladost)

    Miroslav Radeta (2024)
    U ovom radu analizirani su kvartarni klastiti iz bušotine kod Aranđelovca IB 18-3, sa ciljem boljeg razumevanja njihovih sedimentoloških i litoloških karakteristika. Kvartarni sedimenti su prilično homogenog/uniformisanog sastava i čine ih finozrni klastiti (dominantno alevroliti) sa određenim procentom peskovite i glinovite frakcije. Oni su iskartirani u samoj povlati i debljina im je 27 m. U podini su gornjokredne karbonatne stene (krečnjaci, laporci, rekristalisali/mermerisani karbonati) i miocenski sediment predstavljeni raznovrsnim varijetetima klastično karbonatnih stena. Ispitivani kvartarni sedimenti odlikuju se odsustvom ...
    kvartarni klastiti, alevriti, Aranđelovac, granulometrija, mineraloško petrografski sastav
    ... mineralogical-petrographic analysis identified the presence of minerals such as quartz, feldspars and clay minerals. The results suggest that the material predominantly originates from the Bukovički granitoid, and the sediments themselves are of deluvial-proluvial origin. Key words: Quaternary ...

  • Српски језик у дигиталном добу -- The Serbian Language in the Digital Age

    Duško Vitas, Ljubomir Popović, Cvetana Krstev, Ivan Obradović, Gordana Pavlović-Lažetić, Mladen Stanojević (2012)
    Serbian language
    ... simple sentences in languages with sufficient amounts of avail- able text material can achieve useful results, such shal- low statistical methods are doomed to fail in the case of languages with a much smaller body of sample material or in the case of sentences with complex structures. e European Union ...
    ... translation of languages enabled ex- changes across languages; ‚ the creationof editorial andbibliographic guidelines assured the quality of printed material; ‚ the creation of different media like newspapers, ra- dio, television, books, and other formats satisfied different communication needs. In the ...
    ... requiresmillions of sen- tences to boost performance quality. is is one rea- son why search engine providers are eager to collect as much written material as possible. Spelling correction in word processors, and services such as Google Search and Google Translate, all rely on statistical approaches. ...

  • Димензионисање камионског транспорта јаловине на површинском копу Угљевик Исток 1

    Наталија Терзић (2024)
    Напредовањем рударења дошло је до потребе за експлоатацијом сложенијих и сиромашнијих лежишта, самим тим и повећањем трошкова.Профитабилна експлоатација лежишта минералних сировина захтева детаљну анализу свих техничко-економских фактора.Два најутицајнија фактора на профитабилност експлоатације руде јесу откопавање и транспорт, због тога је неопходно направити изводљив стратешки план који ће бити у складу са свим ограничењима и омогућити испуњавање свих планираних резултата.Транспорт на површинским коповима одвија се паралелно са осталим процесима експлоатације, стога је неопходно да сви системи буду усаглашени како не ...
    дисконтинуални транспорт, откривка, транспортне трасе, Тalpac, капацитет, камион, багер
    ... Truck Payload | 57.56| tonne equiv.to | 53.30|cu metres Full Truck Weight |131.56| tonne |:7]| Adjust Truck Payload to maximum capable for curent material [__ok__|| Camem | Cnuka 16. KapakrepacTruke JaMnepa aHraxkoBaHHX 3a TpaHCnopT HakoH yHoca cBHX HOTpcOHMX yJa3HHX HojlaTaKa H3BpCaBa Ce CHMy-alja ...
    ... H3BemrTaja, KOjH je IpHKa3aH Ha cJmiiH 17. 54 Product on Summary - Full Simulation Haulage System: Haulage System-1 Haul Cycle: [PRJ] TRASA 1 Material: [PRJ] Ugalj Roster: [PRJ] 7 day Week - 8 Hour Shifts Mvailability % 85.00 BucketFill Factor 0.94 Average Bucket Load Volume cu.metres 5.91 ...

  • Integrated Stratigraphy of the Middle–Upper Jurassic of the Krížna Nappe, Tatra Mountains

    Renata Jach, Nevenka Đerić, Špela Goričan, Daniela Reháková (2014)
    carbon and oxygen isotopes, radiolarians, calcareous dinoflagellates, radiolarites, Krížna Nappe, West ern Carpathians, Tethys
    ... spiculite wackestone, Bositfra packstone, crinoid wackestonc and grainstone, and crinoid-spiculite wackestone. Beside coarse-grained crinoidal material, quartz and other lithic grains are common. Ammonites occur rarely in the spotted lime- stones and marls. The upper part of the spotted limestones ...
    ... breccia bed, 70 cm thick, is found within the grey nodular limestones of the Filipka Valley section (42 m; Fig. 7). It is composed of crinoid material, with angular clasts (up to 2 cm) of spiculites, crinoidal lime- stones and other sedimcntary rocks. The average CaCOxy content is about 57 ...
    ... 31: 4091—506. [In Slovak, English summary]. Mišik, M., Jablonsky, J.. Ožvoldova, L. & Hal4sova, E., 1991. Distal turbidites with pyroclastic material in Malmian radio- arites of the Pieniny Klippen Belt (Western Carpathians). Geologica Carpathica, 42: 341—360. Mišik, M., Sykora, M., Ožvoldova ...