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Упит dcterms_subject_txt:Influence of synthesis method

2841 items

  • The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers

    Dragan Ignjatović, Predrag Jovančić, Stevan Đenadić, Ivan Janković, Ivica Ristović (2019)
    One of the most important prerequisites for the successful operation of the open-cast lignite mine is to carry out all the auxiliary works timely with the necessary quality. The most important and most commonly used auxiliary machines are bulldozers. Engaging time of bulldozers use is in direct relation with the coefficients of the time and capacity utilization of the continuous system for the excavation of coal and tailings, which indicates their importance. More than 100 bulldozers have been hired ...
    open-cast coal mine, auxiliary works, bulldozers, optimization, availability
    ... than this value than should be more of the machines in the fleet of the open cast mine, thus increasing the costs. On the other hand, insufficient number of machines (dozers) will result in reduced execution of auxiliary operations, with influence on efficiency of continuous systems. Below is an example ...
    ... Cost Capital Cost vW Time of Use Figure 3. The economic life of the machine, based on the minimal cost method (1) Hourly ownership costs and operational costs for dozer could vary significantly. Parameters impacting these costs are: type of job performed, costs of fuel and lubricants, transportation ...
    ... recommended method for evaluation of hourly ownership and operational costs, including data on auxiliary machines (Caterpillar and Komatsu methods). Integration of this information with operational conditions will enable reliable evaluation. Total costs, i.e. specific cost per moto hour is the sum of following ...

  • Optimisation of underground mine decline development system using genetic algorithm

    Zoran Gligorić, Aleksandar Ganić, Rade Tokalić, Aleksandar Milutinović (2014)
    ... are replaced in the new version of the software tool, DOT2, by a method based on an understanding of exact solutions to a constrained 3-dimensional path problem. Their approach is based on the minimization of the cost of the decline, where the cost is a combination of both development and haulage ...
    ... hypothesis used in the optimisation model are as follows: - Location of MPF is fixed; - Location of SBP is allowed to vary; - Location of UMCP is allowed to vary; - Locations of the access points are fixed; - The tonnage of ore to be hauled from each orebody to the surface portal is fixed. ...
    ... equipment characteristics. The absolute value of the decline slope must be less or equal to the maximum value of the slope that can be handled by loaded mine truck in a safe way. Decline optimisation is concerned of determination of locations of SBP and UMCP. A general design optimisation problem ...

  • Linear-motor plunger pump increases lifting efficiency

    Bojan Martinović, Dušan Đekić, Dušan Danilović, Pavel Isaev (2022)
    plunger, linear, motor, pumps

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

    Maja Milošević, Mihovil Logar, Biljana Đorđević (2021)
    ... 380 - 1000 nm range. A standard method was used to determine the water absorption of the investigated shreds of pottery (SRPS ISO 10545-3) reduced to the same dimensions. Based on the obtained results of tested samples of clay pottery, there are a couple of conclusions. Observed difference ...
    ... University of Latvia Inga Jurgelāne Riga Technical University Jūlija Karasa University of Latvia Solvita Kostjukova Alina Olita Medne Riga Technical University Rūta Ozola-Davidāne University of Latvia Valdis Segliņš University of Latvia Ilze Vircava Latvia University of Life ...
    ... traditional coiling and hand-wheel manufacture of pottery with raw clay from the local source are characteristic for Zlakusa (western Serbia), which is on the UNESCO Representative List of the Intangible Cultural Heritage of Humanity. Mass production of utilitarian ceramics and pottery items occurred ...

  • 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
    ... sibility of the automatic annotation of texts based on an annotated corpus, [49] developed during the 1950s and converted to electronic form in the 1990s. Speech synthesis and recognition is being realised at the Faculty of Technical Sciences of the University of Novi Sad through projects of technological ...
    ... boards of daily newspapers and edito- rial boards of radio and TV stations, as well as language experts and mother tongue enthusiasts are endeavour- ing to contribute to the preservation of the regularity and purity of Serbian in its written and oral usage. 3.4.4 Response to the rising influence of English ...
    ... organised in some countries for children of Serbian origin. e need for harmonisation of legal systems and terminology with those in the European Union, the influence of Anglo- American culture in the field of entertainment and the media, as well as the effects of globalisation, are con- tributing to ...

  • 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

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

    Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić, (2019)

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

    Vesna Lesić, Emo Marton, Vesna Cvetkov, Dragana Jovanović (2018)
    ... measurement of the natural remanent magnetization, followed by the measurement of anisotropy of magnetic susceptibility and stepwise thermal and alternating field demagnetization of pilot specimens. According to the behavior of the pilot specimens during demagnetization it was chosen which method was used ...
    ... localities of Late Cretaceous micritic limestones and one locality of flysch and seventeen sites of Oligocene-Earliest Miocene igneous rocks of different composition. In the south, ın the wider Kopaonik Mts. Area we sampled cight sites of dacitoandesites andfifteen localities of granodiorites both of Oligocene ...
    ... радовима запослених доступним у слободном приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository ...

  • Hydrogeochemical distribution of Ca and Mg in groundwater in Serbia

    Petar Papić, Jovana Milosavljević, Marina Ćuk, Rastko Petrović (2014)

  • 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
    ... 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 ...
    ... Dunning, T. (1993). Accurate methods for the statistics of surprise and coincidence. Computational Linguistics, 19(1), pp.61--74. Frantzi, K., Ananiadou, S., and Mima, H. (2000). Automatic recognition of multi-word terms:.the C-value/NC-value method. International Journal on Digital Libraries, 3(2) ...
    ... creation of bilingual and multilingual terminological dictionaries, which would provide coverage of terms from a specific domain. In our future work we will concentrate on:  Finalization of the web application;  Improvement of the precision of correct lemma production (development of additional ...

  • 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
    ... as well. If it turns out to be valid, this method could allow machine learning the usage of huge corpus of texts that are pre-labeled with determiners. 1.1 Review of their former similar studies In 2005 a series of experiments with the classification of mood for internet blog posts was published, ...
    ... volume of terms in the index, while the expanded set of parameters could add a new depth of understanding of the text by both the machines and the people. Infotheca Vol. 17, No. 1, 2017 89 Škorić M., “Classification Based on Emoticons”, pp. 67–91 5.2 Possible applications This method of determiner ...
    ... Twitter platform, mes- sages that are a part of a conversation will be used. The goal of this is to test the ability of the determiner to influence not only the message in which it is located, but also the messages in the immediate vicinity. An additional outcome of this experiment are two software tools ...

  • 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 ...

  • 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

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

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)
    ... grade of this pile is closer to the global annual mean when compared to the grades of each indi- vidual block which comprise the pile, fig. 6. In this case study, we analyzed the performance of the homogenization method for various blending bed sizes. As illustration we present the variability of input ...
    ... Carlo integration method we used. Let fbe a function, and /,,(/) the definite integral of that function: (7) hb, by — T(f)= JdX, dX)... JAN IM Kase XW =[PCOdx (8) a a a, on the region of integration: V a b a b a bn n� � � �[ , ] [ , ] [ , ]1 1 2 2 � (9) Monte Carlo approximation of this definite ...
    ... simulated models of sulfur contents to map the influence of in situ qualities uncertainty on the interpile quality fluctuation. Case study The case study uses data from a coal deposit located in Kolubara surface mine, fig. 4. The operating mining plan uses for grade estimation the original geological ...

  • 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

  • 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
    ... involves several stages: preparation of geological data, filling multilingual metadata database, interface translation and publishing of web services. The final map is a simplified version of OGK 1:500,000, which is basically a compilation, made successive synthesis of data started at maps 1:25000, ...
    ... involves several stages: preparation of geological data, filling multilingual metadata database, interface translation and publishing of web services. The final map is a simplified version of OGK 1:500,000, which is basically a compilation, made successive synthesis of data started at maps 1:25000, after ...
    ... European trend of exchanging data on the basis of uniform criteria for separation, harmonization and improvement of the results achieved. The positive side of this kind of data archiving, is that it ensures that the data are archived, accessible and harmonized. It enables the comparison of data from ...

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

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... ecological assessment of biodiesel production over homogeneous and heterogeneous catalysts in large- scale industrial plants (Simikic et al. 2018) Testing the influence of biodiesel on performance of farm tractors Sunflower oil (Simikic et al. 2018) Development of novel method for bio-component ...
    ... also point out an inhibitory influence of a great number of plants species on weeds. In this manner, Mikulas et al. (1994), examining the influence of the substances of aromatic and medicinal plants on weeds, established an extremely strong inhibitory influence of a marigold (Calendula officinalis) ...
    ... claims (1999) an allelopathic influence of extract of aromatic and medicinal plants on germination of nine species of weeds. The extract of species Matricaria chamomilla inhibited the germination of Amarantfhus retroflexus for 65% and Galium aparine for 6-15%. The extract of species 7hymus vulgaris ...

  • 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
    ... s work had most influence in creation of Astronomic Time Scale, supporting of continental drift hypothesis and palaeo- climatology implications. Positive results of the implementation of the astronomic time scale to the Neo- gene stratigraphy initiated the application of this method within the Mesozoic ...
    ... work - “Mathemati - cal Theory of Heat Phenomena Produced by Solar Radiation” (Fig. 1) and enabled us to understand the mechanisms and causes of climate changes. This is definitely one of the most important scientific the- ories in the climate science. The influence of his work is not just related to ...
    ... University of Belgrade, Faculty of Mining and Geology, Department of Regional Geology, Kamenička 6, 11000 Belgrade, Serbia. E-mail: dejan.radivojevic@rgf.bg.ac.rs Abstract. Milanković’s cycles theory published hundred years ago is the most important theory in climate science and had great influence on Earth ...