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Упит dcterms_subject_txt:metoda Null Space Monte Carlo

321 items

  • Exhumation history of the Juhor Mts. in central Serbia, the Northern Serbo–Macedonian Subunit

    Uros Stojadinovic, Hannah Pomella, Nemanja Krstekanić, Bojan Kostić, Maja Maleš, Nikola Randjelovic, Miloš Radonjić (2024)
    Northern Serbo–Macedonian Subunit, low-t thermochronology, kinematic analyses, extensional deformations

  • Evidence for Ladinian (Middle Triassic) platform progradation in the Gyulakeszi area, Tapolca Basin, Western Hungary: Microfacies Analysis and Biostratigraphy

    Zsolt Robert Nagy, Nevenka Đerić, Sándor Kovács, Anna Oravecz-Scheffer, Felicitász Velledits, Olga Piros, Gabor Csillag (2014)
    anizik, ladin, karbonati, litostratigrafija, biostratigrafija, konodonti, radiolarije, dijageneza
    ... as “evinospon- glac” from the Southern Alps (Gaetani et al. 1981; Frista Bruni et al. 1989; Russo et al. 2000), and from the Ladinian-Carnian of Monte Caramolo (Calabria, Southern Italy) by Boni et al. (1994). Biostratigraphy Large boulders were collected at five locations (samples Fzs1 to ...
    ... Pilot study. N. Jb. Geol. Paleont., 204(1): 83–110. Boni M., Iannace A., Torre M. & Zamparelli V. (1994) – The Ladinian-Carnian Reef Facies of Monte Caramolo (Calabria, Southern Italy). Faces, 30: 101-118. Bosellini A. (1984) - Progradation geometries of carbonate Platforms: examples from the ...
    ... Ciarapica G., Cirilli S., Martini R., Rettori P., Salvini Bonard G. & Zaninetti L. (1990) – Carbonate buildups and associated facies in the Monte Facito Formation (Southern Apennines), BoMl. Soc Geol Ital., 109: 151-164. De Zanche V., Gianolla P., Mietto P., Slorpaes C.H. & Vail P. (1993) ...

  • Sinteza i strukturna karakterizacija novih cezijumskih i kalijumskih silikata sa elementima retkih zemalja

    Predrag Z. Dabić (2022)
    Predmet i ciljevi naučnog istraživanja ove doktorske disertacije su sinteza i strukturna karakterizacija novih cezijumskih i kalijumskih silikata sa elementima retkih zemalja. Istraživanja su izvedena u okviru sistema SiO2–REE2O3–XF, gde REE predstavlja trovalentni katjon elementa retkih zemalja (Sc, Y, Sm, Eu, Gd, Ho, Er, Tm, Yb, Lu), dok X predstavlja jednovalentni katjon alkalnih metala (K, Cs). Rad na disertaciji bio je fokusiran na sintezu monokristala, određivanje kristalnih struktura, kao i na kristalografsko i kristalohemijsko ispitivanje sintetisanih monokristala. Monokristali su sintetisani ...
    alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristalu, elementi retkih zemalja

  • Развој модела употребног квалитета помоћне механизације на површинским коповима лигнита

    Драгица Јагодић Крунић (2021)
    Тренутно стање помоћне механизације на површинским коповима лигнита је незадовољавајуће узроковано пре свега старошћу и неблаговременом заменом машима услед чега је расположивост недовољна а трошкови експлоатације и одржавања високи. Тренутно стање и захтеви који се постављају пред ове машине указују на неопходност оптимизације процеса управљања помоћном механизацијом. Одређивање оптималног времена замене и преосталих могућности је најодговорнији управљачки задатак који треба да буде заснован на свеобухватном сагледавању економских, техничких и других узрочно последичних веза. Са економског аспекта гледано треба одржавати ...
    помоћна механизација, употребни квалитет, ефективност, расположивост, сигурност функционисања, ризик, трошкови животног циклуса, фази логика, Монте Карло метода
    ... Romeu, J., “Kolmogorov–Smirnov GoF test," RAC START, 10(3), 2003. [123] J. Dick, F. Y. Kuo, G. W. Peters, and I. H. Sloan, editors. Monte Carlo and quasi-Monte Carlo methods 2012. Springer, 2013. ...
    ... су: математичка статистика, теорија вероватноће, операциона истраживања, анализа осетљивости, метод сценарија, FMEA, FMECA, метод стабла отказа, метод стабла догађаја, методе моделирања и симулације (Монте Карло) и др. Вредновање ризика је поступак упоређивања нивоа ризика добијеног у процесу анализе ...
    ... релативност. За решавање сложених проблема везаних за недовољно дефинисане феномене погодна је метода Монте Карло [123]. Ова метода се заснива на коришћењу случајних бројева и променљивих. Монте Карло метода подразумева генерисање случајних улазних променљивих, коришћење добијених ''улаза'' за из ...

  • 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

  • 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
    ... Particle tracking can be used for various purposes. The backward particle tracking method with an uncertainty analysis of porosity, applying a Monte Carlo approach, with Geographic Information System (GIS) support, is a useful tool for delineating groundwater protection zones [14]. Particle tracking ...

  • Synthesis and characterization of high-pressure and high-temperature sphene (CaTiSiO5)

    Jelena Pantić, Vladimir Urbanovich, Vesna Poharc-Logar, Bojan Jokić, Marija Stojmenović, Aleksandar Kremenović, Branko Matović (2014)
    Sphene (CaTiSiO5), a calcium titanosilicate ceramic has been prepared from a powder mixture of CaCO3, TiO2 and SiO2 using vibro-milling for homogenization and activation of precursors. During the highpressure and high-temperature synthesis (HPS) process at 4 GPa and 1,200 °C, sphene undergoes into phase transition, from room-temperature phase P21/a to high-temperature phase A2/a. Evidence of that structural phase transition is given in this paper using infrared, Raman spectroscopy and X-ray powder diffraction. Rietveld refinement was employed to get the ...
    Sphene, Phase transition, Raman spectroscopy, X-ray diffraction, SEM, IR

  • Comparing the performance of different landslide susceptibility models in ROC space

    Marjanović Miloš (2013)

  • Geothermal concept for energy efficient improvement of space heating and cooling in highly urbanized area

    Vranješ Ana, Milenić Dejan, Dokmanović Petar (2015)

  • Simultaneous determination of long-term average fluxes of solar pp-neutrinos and cosmic ray muons. Astrophysics and Space Sciences Transactions (ASTRA).

    Aničin Ivan, Pavićević Miodrag, Amthauer Georg, Boev Blažo, Bosch Franz, Bruchle W., Đurčić Zoran, Faestermann, T., Henning, W.F., Jelenković Rade, Niedermann S., Pejović Vladan, Vermeesch P., Weiss A. (2010)

  • Kristalografsko proučavanje strukturne desimetrizacije granata grosularsko-andraditske izomorfne serije

    Pavle I. Tančić (2016-09-21)
    U ovoj Doktorskoj disertaciji proučavano je pet različitih zona makroskopski zonarnog grandita sa lokaliteta Meka Presedla (Kopaonik, Srbija). Pomoću hemijske i elektronske analize mikroprobe preračunati su relativno visoko homogeni sastavi zona, t.j.: Grs64±1Adr36±1Sps2 (A), Grs62±1Adr38±1Sps2 (B), Grs59±2Adr40±2Sps2 (C), Grs58±2Adr41±2Sps2 (D) i Grs58±1Adr41±1Sps2 (E). Glavne promene u sastavima izražene formulom: Ca2,93-2,97Mn0,05-0,06Mg0,00-0,01Al1,14-1,26Fe3+0,72-0,83Ti0,00-0,02Si2,97-3,02O12 ukazuju da je jedina značajnija varijacija ustanovljena samo kod Al-Fe3+ raspodela u oktaedarskom položaju. Ovakav hemijski sastav je potvrđen i sa matematičkim proračunima iz IC i Raman analiza. Urađena ...
    Macroscopically zoned grandite, chemical analysis, electron microprobe analysis, Raman, Rietveld, structure, dissymmetrization, space group

  • Characterization of Natural Clay from Bogovina (Serbia) and Possible Utilization in Sorption of the Herbicides

    Lazar Kaluđerović, Zorica Tomić, Rada Đurović-Pejčev, Maja Milošević (2021)
    ... saturation with the HDTMA complex, there was an expansion of the interlayer space. Depending on the degree of saturation, the long-chain organic complex can exhibit different arrangements in the interlayer space, from monolayer to paraffin orientation. On the other hand, montmorillonite modified ...
    ... exhibited monolayer arrangement of cations on the surface of montmorillonite in such a manner that the cations acted as pillars in interlayer space.  Batch adsorption results were presented as L type isotherms, which mean that the pesticide sorption decreased with increasing pesticide ...
    ... clomazone from the environment. The efficiency of the sorption of S-metolachlor by montmorillonite depends on the size of the interlayer space, the type of interchangeable cation, and also on the characteristics of the montmorillonite surface. Disclosure of Interest: None Declared Keywords: ...

  • 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
    ... described so far, which crystallize in the space groups P63/mcm and P63/mmc, respectively (Vidican et al., 2003; Latshaw et al., 2016c; Dabić et al., 2019). The crystal structure of �-K3YbSi2O7 has been known for quite some time. It crystallizes in hexagonal space group P63/mcm with the following unit-cell ...
    ... described so far, which crystallize in the space groups P6:/mcm and P63/mmc, respectively (Vidican et al., 2003; Latshaw et al., 2016c; Dabié et al., 2019). The crystal structure of a-K;YbSi,O7 has been known for quite some time. It crystallizes in hexagonal space group P63/mcm with the following unit-cell ...
    ... and temperatures of data collections. Crystal 1 Crystal 2 Polymorph T (K) 298 293, 283, . . . , 213 �-K3YbSi2O7 (space group P63/mmc) 295† 100 203, 193, . . . , 93 �0-K3YbSi2O7 (space group Cmcm) † Repeated data collection for crystal 2 after the low-temperature study. Table 2 Experimental details ...

  • State and perspective of individual household heating in Serbia: A survey-based study

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    This paper presents the results of the household survey on individual household heating systems in Serbia. The survey was conducted in the period October to December 2020 with the participation of 1100 households with individual household heating systems. The information collected in the questionnaire can be separated into three main parts: basic household data, current heating system characteristics, and households’ perceptions and attitudes. The survey results provide unique and comprehensive information concerning individual household heating systems and the main ...
    Domaćinstva, Individualni sistemi grejanja, Korišćenje energije, Stavovi potrošača, Anketa, Srbija

  • Pannonian Basin, Pannonian Basin System and Pannonian realm - three different concepts

    Dejan Radivojević (2019)
    Centralni Paratetis, neogen, Panonski basen, Sistem panonskog basena, Panonska oblast
    ... can be said that the initial phase of the accommodation space formation that will later occupy the Pannonian Basin corresponds to the paleogeographical element of that time - Central Paratethys. The Central Paratethys occupied this space starting from the Lower Miocene until the definitive connection ...
    ... neighboring orogen represented by the Carpathians, the Dinarides and the Alps. This term is used in the structural-tectonic sense and refers to a space consisted of numerous connected depressions and highs of different depth/height and of the diachronic extension and different stretching factor. ...
    ... a different concept and does not imply the same areal extinction and the time of sediment deposition. Regarding the Pannonian realm, it covers a space analogous to Pannonian basin which in geomorphological sense encompass Pannonian lowland and Peripannonian rim. The term of the Pannonian Basin system ...

  • Rietveld crystal structure refinement of a natural rhombohedral grossular-andradite garnet from Serbia

    Pavle Tančić, Aleksandar Kremenović (2022)
    Four macroscopically visible B–E (rim) zones, within a large natural ferric grossular garnet of Grs58–64Adr36–42 Sps2 composition, are described by means of Rietveld refinements of the crystal structures in a series of six space groups, followed by com parative analysis of the R-values, site occupancy factors, and bond lengths and angles. The garnet crystallized in the rhombohedral R63c space group. Various polyhedral distortions and structural or derdis or dervariations between the zones studied are also described and discussed. The ...
    Geology

  • Temperature induced evolution of nanostructured Ni0.9Zn0.1O

    Kremenović Aleksandar, Antić Bratislav, Vučinić-Vasić Milica, Colomban Philippe, Jovalekić Čedomir, Bibić Nataša, Kahlenberg Volker, Leoni Matteo (2010)
    The crystal structure and microstructure of as-prepared and annealed Ni0.9Zn0.1O were refined at room temperature in both the Fm (3) over barm and R (3) over barm space groups. It is shown that below the Neel point (458 K), where magnetic ordering triggers the presence of a trigonal strain, the common usage of a higher-symmetry non-admissible space group for crystal structure and microstructure analysis via the Rietveld method may result in both an incorrect structure description and incorrect microstructure ...

  • FTIR Spectroscopic Study Of S-Metolachlor Sorption On Inorganic And Organically Modified Montmorillonite From Bogovina

    Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević (2021)
    ... llonite) 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 reduction of the hydrogen bond ...
    ... significantly with 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 CH2 vibrations is generally the main difference in the spectrum of HDTMA modified ...
    ... bonds). Also, the formation of a hydrogen bond occurs between the molecules of S-metolachlor and the molecules of water 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 ...

  • Geomagnetna bura kategorije G5 u maju 2024. godine

    Magdalena Marčeva (2024)
    Zemlja poseduje magnetno polje, koje je generisano u njenom spoljašnjem jezgru. Magnetno polje Zemlje je konstantno izloženo dejstvu sunčevog magnetnog polja i zračenja koje se sa Sunca emituje. Naelektrisane čestice koje pristižu sa Sunca stupaju u interakciju sa magnetosferom, što dovodi do različitih geomagnetnih poremećaja.Geomagnetna aktivnost direktno je proporcionalna intenzitetu sunčevog zračenja koje dolazi do Zemlje. Pod uticajem sunčevog korpuskularnog zračenja dolazi do pojave geomagnetnih bura koje su praćene porastom intenziteta magnetnog polja.Količina i jačina dolaznog sunčevog zračenja zavisi ...
    magnetosfera, sunčevo zračenje, geomagnetna bura, indeksi geomagnetne aktivnosti, polarna svetlost
    ... Rudarsko- geološki fakultet, Beograd European Space Agency. Current space weather. URL: https://swe.ssa.esa.int/en/current-space-wcather Fox Weather, 2024. Rare severe solar storm brings Northern Lights to Alabama. URL:https://www.foxweather.com/earth-space/rare-severe-solar-storm- northern-lights-alabama ...
    ... Prirodno-matematički fakultet, Niš, str. 198, 200-206, 212-221. Glover, A. & Lomas, G., 2017. Review of space weather impacts on satellite operations. Journal of Space Weather and Space Climate, 7, A33. URL:https://www.sWSc- journal.org/articles/swsc/full_html/2017/01/swsc170014/swsc170014 ...
    ... noaa.gov/stp/geomag/dst.html Space Weather Live, 2024. KP index. URL: https://www.spaceweatherlive.com/en/auroral-activity/kp-index.html Space Weather Prediction Center, 2024. G5 conditions observed. URL: https://www.swpc.noaa.gov/news/g5-conditions-observed Space Weather Prediction Center. URL: ...

  • Non-Detonating Chemical Mixture for Non-Invasive Methods of Rock Breaking

    Lazar Kričak, Milanka Negovanović, Nikola Simić, Stefan Milanović (2024)
    Within the Innovation developed several different non-detonating chemical mixtures for non-invasive methods of rock breaking. Laboratory and polygon tests gave the satisfactory results and knowledge enough to start the practical experiments in the field. The basis of this innovation is a theoretical assumption that certain chemical mixtures release a large quantity of gases during combustion. If these gases are found in the enclosed space a growing pressure on the walls of the chamber in which combustion takes place will ...
    non-detonating, chemical mixture, rock breaking, borehole pressure