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Упит dcterms_subject_txt:Influence of synthesis method

2913 items

  • Optimisation of underground mine decline development system using genetic algorithm

    Zoran Gligorić, Aleksandar Ganić, Rade Tokalić, Aleksandar Milutinović (2014)

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

    Maja Milošević, Mihovil Logar, Biljana Đorđević (2021)

  • Mineralogical and physicochemical characterization of bentonite clay from Svrljig, Serbia

    Maja Milošević, Bojan Kostić (2022)
    ... granulometry (pipette method), cation exchange capacity (CEC) and specific surface area (SSA) measurements. The sample consists mostly of a fraction <1 μm (56.1%) with a 9.5% <2 μm, representing a total clay content (65.5%). Coarse grain fraction (>20 μm) is present in a total of 10.5%. When the clay ...
    ... indicating that the studied clay has a high content of montmoril- lonite and a smaller amount of quartz, carbonates, iron oxy/hydroxides and feldspars. Acknowledgements. Ministry of Education and Science, Republic of Serbia, on realization and financing of scientific research work in 2022, contract No. ...
    ... ion of layer charge of smectites using methylene blue. 2nd International Geosciences Student Conference. Krakow Poland. Milošević, M., Logar, M. 2014. Smectite clays of Serbia and their application in adsorption of organic dyes. EGU General Assembly 16, EGU2014-1882-1. The 22nd Congress of the ...

  • On the distribution modulo 1 of the sum of powers of a Salem number

    Dragan Stankov (2016)
    It is well known that the sequence of powers of a Salem number θ, modulo 1, is dense in the unit interval, but is not uniformly distributed. Generalizing a result of Dupain, we determine, explicitly, the repartition function of the sequence , where P is a polynomial with integer coefficients and θ is quartic. Also, we consider some examples to illustrate the method of determination.
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials
    ... polynomial with integer coefficients and θ is quartic. Also, we consider some examples to illustrate the method of determination.  2016 Académie des sciences. Published by Elsevier Masson SAS. All rights reserved. r é s u m é Il est bien connu que la suite des puissances d’un nombre de Salem θ , modulo ...
    ... set A of local minimum points, a set B of local maximum points, and a set S of (horizontal inflection) stationary points on [−1, 1] of Q (x); (ii) find a set A of fractional parts of values at local minimum points, a set B of fractional parts of values at local maximum points, and a set S of fractional ...
    ... Измењено: 2024-12-25 10:25:46 On the distribution modulo 1 of the sum of powers of a Salem number Dragan Stankov Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] On the distribution modulo 1 of the sum of powers of a Salem number | Dragan Stankov | Comptes rendus M ...

  • Pseudo-linear combination of fuzzy metrics

    Nebojsa M. Ralević, Bratislav D. Iričanin, Dejan Ćebić (2024)
    fazi metrike, filtriranje slika
    ... .[5}, best values of metric of UIQI for each color of image are |0.350641005, 0.36616748, 0.336773334], for parameter values t = 0.1, K = 250 (Fig.[6}. It is concluded that the method based on fuzzy metrics generates a somewhat poorer image quality vis-d-vis the quality of the image filtered ...
    ... noise, the best values of metric of UIQI for each image color are: |0.362342989, 0.364309676, 0.33569145], for parameter values t = 1.5, K = 500 (Fig.[9}. It is concluded that the method based on fuzzy metrics generates poorer image quality vis-đ-vis the quality of the image filtered using ...
    ... concluded that all indices of images filtered using the method proposed in this paper are greater than the corresponding, indices of images filtered using the median filter. As those indices are closer to one, it can be concluded that the image quality is superior. The process of removing, noise from ...

  • Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement

    Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić, (2019)
    ... Results of 2D gravity-density inversion: a) basement model, b) gravity influence of density variations in the basement (gb) and of the first (gm1) and sixth (gm6) model, c) density contrast of the basement blocks for the first (b1) and sixth (b6) model and d) lateral density distribution of the ...
    ... inversion of gravity effect of the basement into lateral density distribution. The procedure was tested using 2D models. Method Infinite horizontal slab is the simplest way to create the model of the basin basement. Bouguer slab formula is applied in order to invert gravity effect of the basement ...
    ... the lateral extension of deeper layers of sediments and the shape of the basement. The total depth of the model is set to be 5 km. Density variations of the basement were calculated for each point along the profile (81 point, 500 m apart). In order to check the results of inversion, basement was ...

  • Hydrogeochemical distribution of Ca and Mg in groundwater in Serbia

    Petar Papić, Jovana Milosavljević, Marina Ćuk, Rastko Petrović (2014)
    ... M/Ca ratios of 0.7 and 0.9, and their chemical composi- tion was under the influence of dolomites in conjunction with limestones. Only one sample had a ratio of 0.91, suggesting the presence of silicate rocks and corroborated on the ground by andesites and flysch sediments in part of this province ...
    ... tentative, nor definitive, identification of the types of rocks that had a dominant influence on rhe formation of the chemical composition of the groundwater. The Mg/Ca ratio is also an importanl drinking water pararneter and the recom- mended (ideal) ratio of these two ions in water is 1:2. Cliven that ...
    ... this was a result of the influence of flysch in the vicinity, even though the province is dominated by limestone and dolomitic karstified rock formations, as corroborated by the Mg to Ca ratio. The Inner Dinarides of western Serbia contained an average Mg concentration in groundwater of 25.29 mg/l; the ...

  • Simulation of Hydrogeological Environmental Discharge in Case of Interruption Constant Observations

    Marina Čokorilo Ilić, Dragoljub Bajić, Miroslav Popović (2024)
    Monitoring Network, data, hydrogeological environment, tunnel, simulation

  • Rule-based Automatic Multi-word Term Extraction and Lemmatization

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Biljana Lazić, Aleksandra Trtovac (2016)
    In this paper we present a rule-based method for multi-word term extraction that relies on extensive lexical resources in the form of electronic dictionaries and finite-state transducers for modelling various syntactic structures of multi-word terms. The same technology is used for lemmatization of extracted multi-word terms, which is unavoidable for highly inflected languages in order to pass extracted data to evaluators and subsequently to terminological e-dictionaries and databases. The approach is illustrated on a corpus of Serbian texts from ...
    term extraction, terminology, multi-word units, lemmatization, finite-state transducers

  • Post Early Miocenevertical-axis clockwise rotation in the West Vardar Zone of Serbia

    Vesna Lesić, Emo Marton, Vesna Cvetkov, Dragana Jovanović (2018)

  • Classification of Terms on a Positive-Negative Feelings Polarity Scale Based on Emoticons

    Mihailo Škorić (2017)
    The goal of this paper is to draw attention to the possibility of using emoticon-riddled text on the web in language-neutral sentiment analysis. It introduces several innovations in the existing framework of research and tests their effectiveness. It also presents a software tool especially made for that purpose, explains how it builds a database with sentimental value of terms and offers the user manual. Finally, it presents a software tool that tests the new database and gives some examples ...
    data mining, information extraction, emotions, text on the web

  • The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system

    Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic (2016)
    The influence of additives (alkyl polyglucoside, Glucopon 600 CS UP and alcohol ethoxylate C18E100) on the behavior of the water/toluene/Lutensol ON 50 (technical oxoalcohol, i-C10E5) microemulsion system as a function of temperature and composition has been investigated. The phase behavior of the microemulsions was determined by vertical sections through the Gibbs phase prism (fish-like phase diagrams). Alkyl polyglucoside shifts the one phase region to lower temperatures compared with water/toluene/Lutensol ON 50 mixtures. This is contrary to the expectation, considering ...
    микроемулзија, толуен, алкил полиглукозид, оксоалкохол етоксилат, појачивач ефикасности, „fish“ дијаграми
    ... thank the Ministry of Education, Science and Technological Development of the Republic of Serbia for financial support under project number 172051, D. Richter and J. Allgaier (JCNS-1), Forschungszentrum, Julich, for providing experimen- tal equipment and the synthesis of Cy+gEio. Lutensol ...
    ... the water/toluene/Lutensol ON 50 system, the determination of the point of optimum solubiliz- ation of equal masses of water and toluene failed. At high yvalues, a single homogeneous phase (10) was 29 M. ILIĆ efa/: THE INFLUENCE OF ALKYL POLYGLUCOSIDES... Chem. Ind. Chem. Eng. Q. 22 (1) 27–32 ...
    ... ivailable on line at issociation of the Chemical Engineers of Serbia ACPE www.ache.org.rs/CICEQ Chem. Ind. Chem. Eng. Q. 22 (1) 27–32 (2016) CI&CEQ THE INFLUENCE OF ALKYL POLYGLUCO- SIDES (AND HIGHLY ETHOXYLATED ALCOHOL BOOSTERS) ON THE PHASE BEHAVIOR OF A WATER/TOLUENE/ fTECHNICAL ALKYL ...

  • Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae

    Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović (2019)
    Two previously unidentified dehydroabietane isomers were isolated from Miocene Serbian lignite and Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers. Dehydroicetexanes are often abundant ...
    Geochemistry and Petrology
    ... Slater, S.M., Vajda, V., 2018. Palynology of Jurassic (Bathonian) sediments from Donbas, northeast Ukraine. Palaeobiodiversity and Palaeoenvironments 98, 153–164. Simmons, E.M., Sarpong, R., 2009. Structure, biosynthetic relationships and chemical synthesis of the icetexane diterpenoids. Natural Product ...
    ... Organic Geochemistry 33, 1225–1240. Nytoft, H.P., 2011. Novel side-chain methylated and hexacyclic hopanes: Identification by synthesis, distribution in a world-wide set of coals and crude oils and use as markers for oxic depositional environments. Organic Geochemistry 42, 520–539. Nytoft, H.P., Petersen ...
    ... dMontanuniversität Leoben, Department of Applied Geosciences and Geophysics, Peter-Tunner-Str. 5, A-8700 Leoben, Austria eUniversity of Belgrade, Innovation Center of the Faculty of Chemistry, Studentski trg 12-16, 11000 Belgrade, Serbia fUniversity of Belgrade, Faculty of Mining and Geology, Ðušina 7, 11000 ...

  • Srbija u OneGeology Europe

    Danka Blagojević, Ranka Stanković, Petar Stejić, Velizar Nikolić (2014)
    Геолошки завод Србије као носилац Пројекта ОneGeologyEurope заједно са Рударско геолошким факултетом и Министарством за природне ресурсе, рударство и просторно планирање су се укључили у међународни Пројекат OneGeology Europe у мају 2013. године у већ поодмаклој фази израде Пројекта. До краја 2013. године испунили су завршене активности које треба да доведу до пуноправног укључења у Пројекат чиме је Република Србија нашла своје место на Геолошкој карти Европе 1:1М. Геолошка карта Србије 1:1М представља компилациону односно поједностављену верзију ОГК 1:500 ...
    OneGeologyEurope, метаподаци, хармонизација података, вишејезични мета-информациони систем

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)

  • Application of stochastic models for mine planning and coal quality control

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)

  • Anticipated sulfur dioxide emissions from coal-fired power plants

    Aleksandar Madžarevic, Predrag Jovančić, Stevan Đenadić, Filip Miletić, Miodrag Ristović, Miroslav Crnogorac (2024)
    Southeastern Europe (SEE), which includes Serbia, along with Germany and Poland, is one of the largest producers of solid fuels in Europe. Despite growing environmental concerns, coal, especially lignite, persists and remains the dominant fuel for electricity generation in this region. Concurrently, these power plants emerge as the predominant emitters of pollutants in all the observed states. To conduct a comprehensive analysis, data on major emitters within the European Union were gathered, allowing for a detailed comparison with SEE ...
    energetika, emisije, SO2, ugalj, elektrane, Srbija

  • Prirodna ranjivost karstnih izdani srednjetrijaskih krečnjaka u oblasti između reka Bistrice, Uvca i Lima

    Branislav Petrović, Veljko Marinović, Zoran Stevanović (2022)
    karstna izdan, Priboj, prirodna ranjivost izdani, COP metoda

  • Multivarijabilni modeli upravljanja u rudarstvu

    Marjan M. Hudej (2014-02-03)
    osetljivost i rizik. Više pobuda generiše ovakvu atribuciju. Prva je, multivarijabilnostambijentalnih uslova i funkcionalna i strukturna složenost rudarskih sistema (čovek -priroda (radna sredina) - mašina – okruženje); Druga se odnosi na ne postojanje opštenaučne saglasnosti oko ocene pogodnosti modela za podršku odlučivanju i upravljanje.Treća, ako bi saglasnost i postojala, nije sigurno da bi raspoloživi modeli, metode i taktike,dale ekvivalentne rezultate za iste rudničke uslove. Četvrta, sistemske nauke još uveknemaju opšte prihvaćen i u praksi primenljiv algoritam izbora najboljeg rešenja ...
    rudarstvo, odlučivanje, upravljanje, model,multivarijabilno, multiatributno, multikriterijumsko

  • Multivarijabilni modeli upravljanja u rudarstvu

    Marjan M. Hudej (2014-02-03)
    osetljivost i rizik. Više pobuda generiše ovakvu atribuciju. Prva je, multivarijabilnostambijentalnih uslova i funkcionalna i strukturna složenost rudarskih sistema (čovek -priroda (radna sredina) - mašina – okruženje); Druga se odnosi na ne postojanje opštenaučne saglasnosti oko ocene pogodnosti modela za podršku odlučivanju i upravljanje.Treća, ako bi saglasnost i postojala, nije sigurno da bi raspoloživi modeli, metode i taktike,dale ekvivalentne rezultate za iste rudničke uslove. Četvrta, sistemske nauke još uveknemaju opšte prihvaćen i u praksi primenljiv algoritam izbora najboljeg rešenja ...
    rudarstvo, odlučivanje, upravljanje, model,multivarijabilno, multiatributno, multikriterijumsko