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Упит dcterms_subject_txt:Structural analysis

748 items

  • 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)
    ... On the other hand, after the organic modification of the montmorillonite with the PTMA complex, stretching vibrations of phenyl ring occur. Analysis of FTIR spectroscopy data showed that the hydrogen bond is one of the most important mechanisms that occur between Na-montmorillonite and S-metolachlor ...

  • Утицај обртног магнетног поља на дерацемизацију кристала натријум-хлората

    М. Милојевић, А. Жекић, П. Дабић, Б. Вучетић, Б. Максимовић (2023)
    ... frequencies of 200, 400, and 1000 rpm, |. – orientation of crystals is dominant, while at 600 rpm, D – orientation of crystals is dominant. X-ray structural analysis showed that the size of the lattice parameter of the obtained crystals does not depend on their oricntation and field rotational frequency ...

  • 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

  • Hidrogeohemija prirodnih radioaktivnih elemenata u podzemnim vodama Srbije

    Marina D. Ćuk (2018-02-23)
    Osnovni cilj doktorske disertacije predstavljao je definisanje prirodnih koncentracija (engl. background values) U, Th, i K u podzemnim vodama, i definisanje hidrogeohemijskih uslova koji utiču na distribuciju navedenih elemenata u podzemnim vodama...
    prirodni radioaktivni elementi, podzemna voda, geohemijske sredine, hidrogeohemijski uslovi, neparametarska statistička analiza, logistički model, hidrohemijsko modeliranje
    ... United States Geological Survey. Hydrologic Analysis and Interpretation, USGS. 59. Helsel D. 2005. Nondetects and data analysis: statistics for censored environmental data. John Wiley & Sons. Inc, Hoboken. 60. Helsel D. (Rob), Lee L. 2006. Analysis of Environmental Data with Nondetects: Statistical ...
    ... important method in the research process. Software packages used for the analysis and graphical interpretation of data were standard statistical packages such as: ProUCL, MedCalc, GWB, and ArcGIS. A detailed analysis of the physicochemical properties of groundwater defined the basic processes ...
    ... Principal Components Analysis to the study of CO2-rich thermomineral waters in the aquifer system of Alto Guadalentín (Spain). Hydrological Sciences Journal. 44(6): 929 – 942. 17. Chem Globe. https://chemglobe.org (pristupljeno 15.06.2014.) 18. Cox DR. 1958. The regression analysis of binary sequences ...

  • Bilingual lexical extraction based on word alignment for improving corpus search

    Jelena Andonovski, Branislava Šandrih, Olivera Kitanović (2019)
    Library and Information Sciences,Computer Science Applications

  • E-Connecting Balkan Languages

    Cvetana Krstev, Ranka Stanković, Duško Vitas, Svetla Koeva (2009)
    In this paper we present a versatile language processing tool that can be successfully used for many Balkan languages. This tool relies for its work on several sophisticated textual and lexical resources that were developed for most of Balkan languages. These resources are based on several de facto standards in natural language processing.
    Query expansion, e-dictionary, wordnet, proper name, aligned text
    ... the majority of European languages, including Balkan languages. Regarding its content, it represents a suitable text for different types of analysis, especially in the domain of named entity recognition (geographical concepts and different measures). Besides that, it was already used for some ...
    ... 2.2 Morphological Dictionaries in LADL Format Morphological dictionaries are a necessary resource in various phases of the automatic analysis of text. The tool WS4LR expects morphological dictionaries to be in the format known as DELAS/DELAF presented in [2] that was developed in LADL ...
    ... Wordnet Semantic networks, seen as one important node in the hierarchy of ontologies, are used more and more in various phases of the automatic analysis of text. The tool WS4LR expects them to be in the form of wordnets, that is, nodes representing sets of synonymous word (synsets) which are ...

  • Energetska efikasnost elektromotora na površinskim kopovima

    Snežana Aleksandrović, Ilija Jeftenić (2023)

  • Mineralogical Discrimination between Authentic and Recent Imitations of Pottery Manufacture in Zlakusa, Serbia

    Maja Milošević, Mihovil Logar, Biljana Đorđević (2021)
    ... Dobrodo, Serbia, for use in ceramics, Clay Minerals, 1-9. doi:10.1180/clm.2019.49 [2] Milošević M., Logar M. & Djordjević B. (2020) Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery. Clay Minerals, 55, 142–149 ...

  • Modeliranje i simulacija energetske tranzicije u sektoru domaćinstava

    Boban S. Pavlović (2022)
    Aktuelnu energetsku tranziciju odlikuje ubrzanje procesa dekarbonizacije energetskih sistema, unapređenje energetske efikasnosti, razvoj čistijih tehnologija baziranih na obnovljivim izvorima energije i održivije korišćenje prirodnih resursa. Da bi se napravio ovako krupan zaokret u postojećim energetskim sistemima, osim promene postojećih tehnologija, potrebno je u planiranje energetske tranzicije uključiti i političke, sociološke, ekonomske i ekološke aspekte, a pre svega obrasce ponašanja i donošenja odluka krajnjih potrošača. Predmet istraživanja u disertaciji je energetska tranzicija sektora domaćinstva, preciznije tranzicija u grejanju domaćinstava, imajući u ...
    energetika, energetska tranzicija, energetsko planiranje, energetsko modeliranje, obnovljivi izvori energije, domaćinstva, ponašanje potrošača

  • Tektonska evolucija severoistočnih Dinarida

    Nikola Ranđelović, Branislav Trivić, Nemanja Krstekanić, Bojan Kostić, Uroš Stojadinović (2022)
    ... Netherlands; E-mail: nikola.randjelovic@rgf.bg.ac.rs Keywords: Adria-Europe convergence, Internal Dinarides, Pannonian Basin extension, structural analysis The north-eastern margin of the Internal Dinarides, located near their junction with the Carpatho-Balkanides, has recorded several ...
    ... distinguish main deformation phases in the Internal Dinarides and determine their controlling mechanisms, we conducted coupled field and micro-structural investigations in the wider area of the Bukulja Mts in central Serbia, which comprise parts of the Internal Dinarides’ Jadar-Kopaonik and Dr ...
    ... significant exhumation of previously buried segments of the Adriatic margin, as a result of the coeval opening of the Pannonian Basin. The ductile structural pattern related to this extensional phase is characterized by dominant E- dipping S3 foliation. Moreover, a top to E ductile shear zone with quartz ...

  • Одређивање оптималне производње дубинске пумпе на клипним шипкама

    Небојша Савић (2024)
    Дужи временски период током историје производње нафте, дубинске пумпе на клипним шипкама су први и у многим случајевима једини избор када су у питању механичке методе експлоатације. Правилан одабир сваког појединачног елемента система омогућава оптимизацију која са собом повлачи бенефите у виду повећавања ефикасности и смањења трошкова. Тренутно примењени систем дубинских пумпи на клипним шипкама на лежишту „Н“ обезбеђује стабилну производњу и реализацију годишњих планова производње без већих проблема. У овом раду је приказан начин оптимизације производње дубинским пумпама ...
    дубинска пумпа, оптимизација, производња, потисни вентил
    ... incluđeđ) (Min Totq) Fuudsp.praviy: | 0.9646 NEMA D molor: 10HP Sinqle/đouble cyl enqine 10HP Multcyunder Engine' 10MP Pumping Un&:APi 7.8 Torque analysis and elecincity BNN:GED API Size:C-160.175-86 (Una ID CUSTOM) consumption (MinTora) 'Crank hole number. #3(ovtof4) Calculated stroke lenth (crn) ...
    ... (Min Torq) Fluiđ sp. qravity: 0.9842 NEMA D molor. 15HP Sinake/double cyl. enoine: 15 HP Mulbcyunder Engine: 15 HP Pumping Unit:UP90 Torque analysis and electricity BALANCED API Size:C-310-202-118 (Unit ID CUSTOM) OMAaTor) ~ · u OMNAG dirtka lataih o r al lhescdLiara -=:aOaia -10 b afbox ...
    ... efficiency/fdlaqe | 41%/95% | Fiecommended plunaor lenqth (m)- 5 Plunqer size (mm) 38 1 Pumop fnction (N)- 890 Rod string design Rod string stress analysis (service factor: 0.9) Diameter (mm) | __RodGrado # Guides/Rod 222 TEND Alov o >»>22 TEND Alov 3 191 TEND Allv 3 191 TEN D Alov o 191 TEND ...

  • Machine learning based landslide assessment of the Belgrade metropolitan area: Pixel resolution effects and a cross-scaling concept

    Uroš Đurić, Miloš Marjanović, Zoran Radić, Biljana Abolmasov (2019)
    Improvements of Machine Learning-based landslide prediction models can be made by optimizing scale, customizing training samples to provide sets with the best examples, feature selection, etc. Herein, a novel approach, named Cross-Scaling, is proposed that includes the mixing of training and testing set resolutions. Hypothetically, training on a coarser resolution dataset and testing the model on a finer resolution should help the algorithm to better generalize ambiguous examples of landslide classes and yield fewer over/underestimations in the model. This ...
    klizišta, podložnost, mašinsko učenje

  • Nonequilibrium athermal random-field Ising model on hexagonal lattices

    Svetislav Mijatović, Dragutin Jovković, Đorđe Spasojević (2021)
    Изингов модел, хексагонална решетка

  • Development Of The Serbian Geological Resources Portal

    Ranka Stanković, Jelena Prodanović, Olivera Kitanović, Velizar Nikolić (2011)
    ... bg.ac.rs Introduction The Geological information system of Serbia (GeolISS) represents a repository for digital archiving, query, retrieving, analysis and visualization of geologi- cal data. The development and implementation of GeolISS is managed by a team from the Faculty of Mining and Geology ...
    ... VELIZAR NIKOLIĆ2 Abstract. The Geological information system of Serbia (GeolISS) represents a repository for digital archiving, query, retrieving, analysis and visualization of geological data. The development and implementa- tion of GeolISS is managed by a team from the Faculty of Mining and Geology ...

  • Advantages and challenges in presenting mathematical content using EDX platform

    Marija Radojičić, Ivan Obradović, Ranka Stanković, Olivera Kitanović, Roberto Linzalone (2016)
    ... base with strong terminological relations and an explicit and expressive domain ontology. Such a resource would facilitate quick search and analysis of mathematical content. To date, there is no publicly available resource for mathematical content management in Serbian. 7. CONCLUSION This ...
    ... Some challenges in creating mathematical courses within the edX-BAEKTEL platform were pointed out. The lack of engines and resources for deeper analysis and search of mathematical content in Serbian was emphasized. Future work will be based on a more comprehensive research related to awareness ...

  • The Importance of Geotechnical Investigations for the Construction of Transfer Station „Prelići“ on Landfill in Cacak – Serbia

    Dragoslav Rakić, Irena Basarić, Jovana Janković, Tina Đurić (2019)
    For the purpose of the facilities construction within the transfer station „Prelici“ in Cacak, specific geotechnical investigations were carried out based on which the technological project with the facilities schedule was developed. Significant deviations in relation to the presented results were determined during earthworks, so the additional geotechnical investigation works were carried out. Since the new investigation works have determined a different cross section of the terrain, it was proposed to move the planned facilities which led to the ...
    landfill, geotechnical investigations, transfer station
    ... into the urban industrial environment. In addition, an analysis of the available waste composition data and their comparison with the total mass of waste with data from different parts of the world and the average data for Serbia. 4. ANALYSIS OF GEOTECHNICAL CONDITIONS FOR THE CONSTRUCTION OF THE ...

  • Numerical modeling of Selanac debris flow propagation using SPH code

    Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi (2021)
    The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling in different programs using Voellmy rheology assumptions like RAMMS software. In this paper research are focusing particularly on the process of debris flowing from initiation zone to main deposition area using Geoflow SPH two-phase model considering frictional rheology law. Main rheological parameters are back-calculated using also ...
    debris flow, modelling, SPH code, DEM
    ... application to non-spherical stars’’. Monthly Notices of the Royal Astronomical Society; 181:375–389. Hungr, O. (1995). ‘’A model for the runout analysis of rapid flow slides, debris flows, and avalanches’’. Canadian Geotechnical Journal 32 (4):610-623. Iverson, R.M. (1997). ‘’The physics of debris ...
    ... Drempetic, V. (2009). ‘’A depth integrated, coupled SPH model for flow-like landslides and related phenomena’’. International Journal on Numerical Analysis and Methods in Geomechanics, 33(2): 143–172. doi:10.1002/nag.705. Cascini, L., Cuomo, S., Pastor, M., Sorbino, G., and Piciullo, L. (2014). ‘’SPH ...

  • Maturation and isotopic changes of individual hydrocarbons in lignite lithotypes through diagenesis and early catagenesis

    Ivan Kojić, Achim Bechtel, Reinhard Sachsenhofer, Dragana Životić, Ksenija Stojanović (2019)
    ... temperatures ог 400 "С (Pyr400). 450 *C (Pyr450) and 500 *C (Pyr500). This temperature range was chosen according (0 data from thermogravimetric analysis which inđicate that the first significant mass 1055 (after releasing ог moisture) occurs between 400 "С and 500 %C. Aliphatic апд aromatic fractions ...

  • 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
    ... chemistry resources (Book 5. Thermal Analysis). http://physicalchemistryresources.com/. Schrader, R. und Hoffmann B. (1969) Über die Mechanische Aktivierung von Calciumcarbonat. Z Аnorg Аllg Chem 369: 41-47. Taylor M. and Brown G.E. (1976) High-temperature structural study of the P21/a ↔ A2/a phase ...
    ... theoretical value). Rietveld refinement confirms that sphene crystallizes in space group А2/a аѕ a principle crystalline phase. The most important structural change due to phase transition, the disappearance of the characteristic out-of-center distortion of the Ti atom and moving to the center of octahedra ...
    ... (1999b) High pressure phase transition in CaTiOSiO4 titanite. Phase Trans 68: 533-543. Angel R.J., Ross N.L., Seifert F. and Fliervoet T.F. (1996) Structural characterization of pentacoordinate silicon in a calcium silicate. Nature 384: 411-444. Антић-Јовановић, А. (2002) Молекулска спектроскопиј ...

  • Some examples of interactions between certain rare earth elements and soil

    Zlatko Nikolovski, Jelena Isailović, Dejan Jeremić, Sabina Kovač, Ilija Brčeski (2021)
    Freundlich adsorption isotherm, sequential extraction, metallic ions, ICP-OES
    ... Trace Rare Earth Analysis) were used for determining Freundlich adsorption isotherm, whereas as the source of neodymium and lanthanum (III)- ions, NdCl3x6H2O (Merck, 99.9 % trace metals basis) and La2(CO3)2 (Sigma- Aldrich, 99.9% trace metals basis, ≤ 1500.0 ppm Trace Rare Earth Analysis) were used for ...
    ... Sequential extraction (SE) was used for desorption of these elements from the soil. EXPERIMENTAL Material and method The soils used for the analysis are: humus, clay and sand type of soils. The soil fractions do not mutually differentiate as per the particles sizes but also as per mineralogical ...