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Упит dcterms_subject_txt:metoda Null Space Monte Carlo

321 items

  • Optimisation of underground mine decline development system using genetic algorithm

    Zoran Gligorić, Aleksandar Ganić, Rade Tokalić, Aleksandar Milutinović (2014)
    ... into one integrated system. The main idea that we used to create such system is based on the fact that somewhere in 3u (3–dimensional underground space) there is a point through which we can connect all ore bodies with surface portal (or surface breakout point, SBP) and afterward with mineral processing ...
    ... The tonnage of ore to be hauled from each orebody to the surface portal is fixed. A decline development system is modeled as a 3–dimensional or space network interconnecting all main points. Such network must incorporate the navigability constraints caused by the mine trucks and other equipment ...
    ... and UMCP coordinates, while xL and xU are the n-dimensional vectors representing the lower and upper bounds of the coordinates, i.e. the design space. The optimisation goal is to minimize the objective function f(x) subject to a given number of constraints: gi(x) is the r-dimensional vector of ...

  • Dvodimenzionalna geometrijska morfometrija prvih gornjih molara hominina sa teritorije Srbije - taksonomska i metodološka analiza

    Predrag N. Radović (2022)
    Primarni cilj ove studije tiče se taksonomske identifikacije fosilnih prvih gornjih molara (M1) hominina pronađenih u Srbiji, primenom metoda dvodimenzionalne (2D) geometrijske morfometrije. U prvoj (metodološkoj) fazi istraživanja ispitana je efikasnost 16 različitih pristupa (geometrijskih modela) u klasifikaciji M1 neandertalaca i anatomski modernog čoveka. Modeli su testirani na dva seta okluzalnih projekcija krunica (n = 34 i n = 64) dobijenih orijentisanjem digitalnih 3D modela u virtuelnom okruženju ili fotografisanjem fizičkih primeraka zuba. Prilikom testiranja primenjena je klasifikacija zasnovana ...
    2D geometrijska morfometrija, prvi gornji molar (M1), taksonomska identifikacija, neandertalci, anatomski moderni ljudi, Pešturina, Velika Balanica, Srbija

  • 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

  • Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

    Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)
    Polimeri i plastika, opšta hemija
    ... matter (EOM, bitumen) was extracted from the pulverized lignite sample using Soxhlet extraction with dichloromethane/methanol (both of HPLC grade, Carlo Erba Reagents, Val de Reuil, France) azeotrope (88:12, v:v) over 48 h. Solvent was Polymers 2021, 13, 759 4 of 25 removed by rotary vacuum evaporator ...
    ... furnace in the middle of the quartz tube. After cooling the pyrolytic system over night, the quartz tube was rinsed with chlo- roform (HPLC grade, Carlo Erba Reagents, Val de Reuil, France) and this extract was combined with the liquid product collected in the cold trap. Chloroform was removed by rotary ...
    ... Samples were re-suspended in a small amount of dichloromethane (the mass ratio of sample and dichloromethane was 2:1.5) and then n-heptane (HPLC grade, Carlo Erba Reagents, Val de Reuil, France) was added (mass ratio n-heptane/lignite EOM or liquid pyrolysate = 40:1). The suspension was intensively shaken ...

  • Polymorphism and photoluminescence properties of K3ErSi2O7

    Predrag Dabić, Marko G. Nikolić, Sabina Kovač, Aleksandar Kremenović (2019)
    alkalni silikati elemenata retkih zemalja, silikati lantanoida, polimorfizam, fotoluminescencija, kristalna struktura

  • Design and optimisation of laser scanning for tunnels geometry inspection

    Pejić Marko, Božić Branko, Abolmasov Biljana, Gospavić Zagorka (2013)

  • Corrigendum to „Design and optimisation of laser scanning for tunnels geometry inspection“

    Pejić Marko, Božić Branko, Abolmasov Biljana, Gospavić Zagorka (2013)

  • SrpELTeC: A Serbian Literary Corpus for Distant Reading

    Ranka Stanković, Cvetana Krstev, Duško Vitas (2024)
    U članku je predstavljen SrpELTeC, korpus razvijen u okviru akcije COST Distant Reading for European Literary History (CA16204). Svi romani u SrpELTeC-u su odabrani, pripremljeni i obeleženi korišćenjem zajedničkih principa uspostavljenih za sve jezičke zbirke u Evropskoj zbirci književnog teksta (ELTeC). Navedeni su izazovi i rešenja u pripremi SrpELTeC od nule. Svi romani su ručno kodirani u TEI sa bogatim metapodacima i strukturnim napomenama. Automatska anotacija je uključivala POS-označavanje, lematizaciju i imenovane entitete, oslanjajući se na resurse za obradu ...
    digital humanities, Serbian literature, text corpora, distant reading , linked data, named entity recognition, text analytics

  • Why classical sequence stratigraphy doesn't work in Pannonian basin?

    Dejan Radivojević (2018)
    basen iza ostrvskog luka, detačment, miocen, Panonski basen, riftogeneza, sekvenciona stratigrafija
    ... subsidence  and  creation  of  large  accommodation  space,  while  others  advocate  slow  subsidence  regime  which  formed small accommodation space. Because of half‐graben asymmetry and subsidence is controlled by  one major fault, accomodation space in rift basins is variable. From those reasons tr ...
    ...  Besides that, in late rift climax systems tract sediments dipping is less  than earlier and sediments filled the biggest part of the rest of accommodation space.  The postrift Tertiary sediments are represented with prograding delta system. The delta bottom‐ sets (S4), foresets (F1) and topsets (F2) facies ...
    ... om izdizanju ili mirovanju zajedno  sa visokim nivoom sedimentacije doveo je deponovanja agradacionih do progradacionih sekvenci.     MATERIJAL I METODE    U svrhu određivanja promene osnovnog nivoa (base level), tektonskih i sedimentacionih odnosa  urađen je regionalni seizmički kompozitni profil ...

  • Towards more sustainable district heating systems in Serbia - Options and obstacles

    Marija Živković, Boban Pavlović, Dejan Ivezić, Miloš Tanasijević, Dejan Stojanović (2024)
    The major share of energy consumed in the building environment is dedicated to meeting heating needs, which makes this sector one of the key players in the transformation of the whole energy system. The accurate approach to the transition process assumes acting on both the demand and supply sides. Lately, the supply side has received more attention, as its transformation is one of the key steps of the energy transition process. District heating systems are recognized as substantial contributors ...
    energetska tranzicija, daljinsko grejanje, dekarbonizacija, obnovljivi izvori energije, prepreke, Srbija

  • Утицај соларне активности на здравље човека

    Каролина Ђукић, Весна Цветков, Весна Дамњановић (2019)
    ... 3(4), 1587-1597. [3] Allahverdiyev, A.R., Babayev, E.S. et al. (2001). Possible space weather influence on functional activity of the human brain. Proc. Space Weather Workshop, 17-19. [4] Babayev, E.S. (2006). Space weather Influence on Technological, Biological and Ecological Systems: Some Major ...
    ... The effect of geomagnetic storms on suicide. South African Psychiatry Review, 6, 24-27. [12] Alexander, L.T., Suliman al Atawi, N. At al. (2016). Space Weather Effects on Humans in Tabuk City, KSA. International J. of App. Sci. and Tech., 6(1), 47-57. [13] Papathanasopoulosa, P., Preka-Papademab ...

  • Effects of Energy Production and Consumption on Air Pollution in Serbia

    Marija Živković (2019)
    Energy production and combustion, mostly from unregulated or inefficient fuel combustion, are the single most important anthropogenic sources of air pollutant emissions. Energy sector in Serbia is highly fossil fuel intensive: 87.88% of energy consumed in Serbia is related to fossil fuels, while almost 95% of energy sources are combusted. In 2017. energy related carbon dioxide emission in Serbia is was 47.95 million tones. The main source of carbon dioxide emission was coal, responsible for almost 70% of energy ...
    energy related emissions, Serbia
    ... monoxide emission from the transport sector is passenger transport (303.4 million of tones) while the emission from the residential sector is related to space heating (206 million of tones) (Figure 8) Figure 8. Sources of carbon monoxide emission in the transport and residential sectors by activity Nitrogen ...
    ... or some measures that could be option for mitigating air pollution in Serbia are explored in 11.Emissions from the buildings are mainly due to the space heating. Related emissions can be reduced by energy rehabilitation of buildings, connection to district heating systems, introduction of more efficient ...
    ... monoxide emission from the transport sector is passenger transport (303.4 million of tones) while the emission from the residential sector is related to space heating (206 million of tones). The dominant source of NOx emission in Serbia is transport sector due to specific conditions of combustion in internal ...

  • Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera

    Aleksandra B. Kolarski (2016-08-25)
    Radio talasi vrlo niskih frekvencija VLF (eng. Very Low Frequency) frekventnog opsega od 3 do 30 kHz, koji se prostiru talasovodom Zemlja-jonosfera (50 -90 km) su, kao što je poznato, efikasni i nezamenljivi u osmatranju pojava u niskoj jonosferi, sa tla...
    prostiranje talasa vrlo niskih frekvencija, talasovod Zemlja-jonosfera, globalno električno kolo, atmosfersko električno pražnjenje, kratkotrajne svetlosne pojave
    ... 9781–9794, doi:10.1002/2015JA021607. http://www.physics.otago.ac.nz/space/DEMETER_attenuation_acccepted_Oct2015.pdf http://www.physics.otago.ac.nz/space/DEMETER_attenuation_acccepted_Oct2015.pdf http://www.physics.otago.ac.nz/space/DEMETER_attenuation_acccepted_Oct2015.pdf 110 Žigman, V., Grubor ...
    ... Statistical analysis of space time relationships between sprites and lightning. J. Atmos. Sol.-Terr. Phys., 65, pp. 525–535. Schunk, R. W., Nagy, A. F. (2000). Ionospheres: physics, plasma physics and chemistry. Cambridge University Press. 570 pp. Schwenn, R. (2006). Space Weather: The Solar Perspective ...
    ... 1029/2005JD006879. Vaughan Jr., O. H., Blakeslee, R., Boeck, W. L., Vonnegut, B., Brook, M., Jr., J. McKune (1992). A cloud-to-space lightning as recorded by the Space Shuttle payload bay TV cameras. Mon. Wea. Rev., 120, pp. 1459–1461. Vaughan, O. H. Jr., Vonnegut, B. (1989). Recent observations ...

  • 2D geoelectrical resistivity tomography application at the former city waste dump "Ada Huja": Eco-geological problem

    Branislav Sretenović, Filip Arnaut, Ivana Vasiljević, Vesna Cvetkov (2019)
    2D inversion, geoelectrical method, Wenner array, ecology, Ada Huja
    ... geoelectrical surveying methods (Dahlin, 1996). Three-dimensional (3D) surveys provide information about the whole geometry of the surveyed half-space. For this kind of study, the largest amount of acquired data is needed (couple of thousands) (Loke, 2004). 2D geoelectrical surveying was applied ...
    ... value zones (1-2 Ωm) which made a “screen” type effect and made it difficult for the penetration of electric current to deeper levels of the half-space, i.e. regardless of Wenner array dimensions. 2D geoelectrical resistivity tomography … 63 Due to the large resistivity value variations (1-200 ...
    ... low resistivity value. It obtains that low value from the reaction with electrolytic leachate. Marl type rocks that make up the basis of the half- space also have a low resistivity value, but one order of magnitude greater that the deposited waste. Figure 4 Sections of apparent (top) and true (bottom) ...

  • Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential

    Nataša Čuković-Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, Olivera Krunić (2021)
    The study presented in this paper assessed the multidisciplinary approach of geothermal potential in the area of the most southeastern part of the Pannonian basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within a small settlement. Geothermal resources come ...
    геотермална енергија, Панонски басен, геотермална каскада, енергетска ефикасност, бањски центри, балнеологија, биоклиматска архитектура, стратегије пасивног дизајнирања, модуларни објекти
    ... between the modules to be sheltered and functionally supported by the side volumes. Longitudinal circulation space can be open or enclosed with glazed south-facing walls to serve as a buffer space for modules. Massing, solar gains and shading: Modules are compact to provide a good shape factor for each ...
    ... basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within ...
    ... a valuable resource having a variety of uses: from electricity generation (through geothermal power plants or through cogeneration systems) [1] and space heating and cooling (using the heat pumps) to direct use in a wide range of applications in areas such as balneotherapy [2,3], agriculture, industry ...

  • Application of the principle of circular economy to the thermal groundwater, the example of the municipality of Bogatić

    Marija Jovanović, Vesna Ristić Vakanjac (2021)
    There are about 360 locations of thermal and thermo-mineral waters in Serbia, whose water temperatures range from 14 to 98°C, which ranks Serbia as the richest European country in geothermal energy. The mentioned water resources (thermal and thermomineral waters) are used, mostly, for therapeutic purposes in spas and sports and recreational centers. The main problem that is present is the fact that they are not used in a rational and efficient way. The paper will give examples territorially related ...
    water-food-energy nexus, geothermal resources, groundwater management, sustainability, Bogatić

  • A new copper(II) arsenate, Na2Cu3(AsO3OH)4·4H2O containing discrete [Cu3O12]18− units: Synthesis, crystal structure and magnetic properties

    Tamara Đorđević, Ljiljana Karanović, Zvonko Jagličić (2018)
    Single crystals of the new disodium tricopper(II) tetrakis(hydrogenarsenate(V)) tetrahydrate, Na2Cu3(AsO3OH)4·4H2O were grown under hydrothermal conditions. The compound was characterized by room-temperature single-crystal X-ray diffraction, SEM-EDS analysis, Raman spectroscopy and magnetic susceptibility measurements. Na2Cu3(AsO3OH)4·4H2O represents a new layered structure-type [space group P21/c, a = 8.7089(17), b = 9.7452(19), c = 9.3353(19) Å, β = 92.63(3)°, V = 791.4(3) Å3, Z = 4]. The layers are normal to [100] and are composed of the isolated Cu3O12 units interconnected by AsO3OH coordination ...
    Na2Cu3(AsO3OH)4•4H2O, хидротермална синтеза, кристална структура, хидрирани хидрокси-арсенати, магнетна својства

  • FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina

    Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević (2021)
    ... rillonite) are typical for smectites with a high Al content in the octahedron position. The intercalation of HDTMA* cations into the interlayer space produces redshift of the IR bands that originate from the vibrations of the adsorbed water, as a consequence of the hydrogen bond strength reduction ...
    ... tly with the increasing . concentration of HDTMA* cation. All these changes are related to the decreasing of the water content in the interlayer space by increasing the content of HDTMA. The occurrence of the stretching CH vibrations is generally the main difference in the spectrum of HDTMA modified ...
    ... S-metolachlor and the molecules of water 329 SERBIAN SOCIETY OF SOIL SCIENCE Soils for Future under Global Challenges that are in the interlayer space and/or oxygen on the surface of the tetrahedral sheet of the montmorillonite. Keywords: adsorption, S-metolachlor, HDTMA, PTMA, infrared spectroscopy ...

  • Синтеза и карактеризација керамике на бази сфена

    Jelena R. Pantić (2015-07-10)
    Механохемијска активација стехиометријске смеше реактаната TiO2, SiO2 и CaCO3 показала се као веома успешна и једноставна метода за добијање сфена (CaTiSiO5). На основу мерења релативних густина свих синтерованих узорака установљено је да максималну густину од 93,9 % имају узорци који су активирани 30 минута и синтеровани на 1200 °С. Микроструктурном анализом, тј. анализом слика синтерованих узорака активираних 30 минута, које су добијене скенирајућом електронском микроскопијом, опажа се бимодална расподела величине зрна, са просечном величином од 3 μm, односно 5 ...
    сфен, механохемија, Ритвелдова метода, оптичка спектроскопија, микроструктурна анализа, фазна трансфоpмација, чврсти раствори
    ... првенствено као метода за идентификацију фаза. Развој Ритвелдове методе (Rietveld 1967; Rietveld 1969), рачунарске технике и одговарајућих програма који користе ову методу (један од њих је и FullProf) омогућио је решавање и утачњавање структура поликристалних материјала. Ритвелдову методу користе још ...
    ... величине кристалита добијене Ритвелдовом методом, што показује да су зрна у ствари агломерати, састављени од неколико кристалита. Tакође, процес синтеровања под притиском доводи по смањења величине кристалита. Кључне речи: сфен, механохемија, Ритвелдова метода, оптичка спектроскопија, микроструктурна ...
    ... оксидација итд.) сигнал даје позитивне ΔТ вредности (Scott, 2000; Hemminger et Sarge, 1998). ДТА методом се прате фазни прелази, топлотни капацитет, температура и енталпија прелаза. Предности ДTA методе су што може да се користи на врло високим температурама, и што су инструменти врло осетљиви. ...

  • A new polymorph of Ba(AsO3OH): Synthesis, crystal structure and vibrational spectra

    Tamara Đorđević, Ljiljana Karanović (2010)
    A new monoclinic polymorph of Ba(AsO3OH) was synthesized under hydrothermal conditions. It represents a previously unknown structure type. Its crystal structure was determined from a racemic twin using single-crystal X-ray diffraction data collected at 120 and 293 K [space group P21, a=7.2149(14)/7.2370(2), b=7.7028(15)/7.7133(2), c=21.7385(43)/21.8079(5) Å, β=95.95(3)/96.073(1)1, V=1201.6(4)/1210.51(5) Å3, Z=12]. The crystal structure of P21-Ba(AsO3OH) has a layered character and is built up of four types of regularly alternating layers parallel to (0 0 1). Every AsO3OH tetrahedron is chelating to two Ba atoms and ...
    Ba(AsO3OH), хидротермална синтеза, структурна анализа монокристала, Раманска спектроскопија, инфрацрвена спектроскопија, водоничне везе, хидрогенарсенати земноалкалних метала