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Упит dcterms_subject_txt:Solid solution

321 items

  • A Knowledge-Based Approach to Mine Ventilation Planning in Yugoslav Mining Practice

    Nikola Lilić, Ivan Obradović, Ranka Stanković (2002)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper, we ...
    ... particular solution gets a very high value. This means the possibility that the genetic algorithm will select this solution in the reproduction process is extremely small. Figure 16 shows the user interface of SimVent realized using Visual Basic and the Gene-Hunter dynamic library, giving a solution for ...
    ... 4–7 and 6–7 (176.81 Pa and 56.56 Pa respectively, Table 1). However, the analysis of the proposed solution from the engineering point of view makes it clear that the practical realization of this solution is impossible and that alternative solutions are needed. To that end, a genetic algorithm was used ...
    ... package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation ...

  • A Description of Morphological Features of Serbian: a Revision using Feature System Declaration

    Cvetana Krstev, Ranka Stanković, Vitas Duško (2010)
    In this paper we discuss some well-known morphological descriptions used in various projects and applications (most notably MULTEXT-East and Unitex) and illustrate the encountered problems on Serbian. We have spotted four groups of problems: the lack of a value for an existing category, the lack of a category, the interdependence of values and categories lacking some description, and the lack of a support for some types of categories. At the same time, various descriptions often describe exactly the same ...
    Morphology, Lexicon, lexical database, Standards for LRs
    ... the first version of this new description, but we treat it as an ongoing project because for some properties we have not yet found the satisfactory solution. 1. Motivation Description of morphological features of a language is a prerequisite for many NLP applications. This description can be simple ...
    ... su(pl) se već u osam časova u velikom salonu Reform-kluba. The five antagonists of Phileas Fogg had met in the great saloon of the club. The solution to this kind of problem asks for addition of new categories that was not encouraged by MULTEXT-East in the past. (c) The interdependence of values ...
    ... communication December, 2009) 817 4. The New Solution Our main goal was to produce a new systematic morphological description of Serbian: (1) that would not deviate much from the traditional description; ...

  • NMR kinetic studies of the interactions between [Ru(terpy)(bipy)(H2O)]2+ and some sulfur-donor ligands

    Aleksandar Mijatović, Biljana Šmit, Ana Rilak, Biljana Petrović, Dragan Čanović, Živadin D. Bugarčić (2012)
    Reakcije supstitucije monofunkcionalnog [Ru(terpi)(bipi)(H2O)]2+ kompleksa, gde je terpi = 2,2′:6′,2″-terpiridin i bipi = 2,2′-bipiridin, sa biološki relevantnim sumporo donorskim ligandima, kao što su tiourea, l-metionin, l-cistein i glutation, proučavane su u vodenim rastvorima tehnikom 1H i 13C NMR spektroskopije. Sve reakcije su proučavajne na pH 7,4, u prisustvu fosfatnog pufera, da bi se oponašalo fiziološko okruženje tokom procesa supstitucije. Reakcije se izvode na 295 K pod uslovima reakcija drugog reda. Uočeni rezultati pokazuju da brzina supstitucije snažno zavisi ...
    Materials Chemistry,Inorganic Chemistry,Physical and Theoretical Chemistry

  • Actual contamination of the Danube and Sava rivers at Belgrade (2013)

    Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer (2014)
    rečni sistemi, stanje zagađenja, organski zagađivači, teški metali, skrining analize, non-target screening
    ... were separately mixed with 200 μL manganese sulphate solution (2.5 mM), 0.5 mL sodium salicylate solution (1.5 M), 0.5 mL potassium sodium tartrate solution (30 mg mL-1), 0.5 mL 5 % aqueous hypochlorite solution and 0.5 mL sodium hydroxide solution (0.5 M). The mixture was incub- ated 10 min for Indophenol ...
    ... separately dried by filtration over approximately 1 g of anhydrous granulated sodium sulphate (Merck, Germany) and 50 µL of an internal standard solution containing d34 n-hexadecane, fluoroacetophenone and decafluorobenzophenone in n-hexane (the concentrations were 6.0, 7.2 and 6.9 ng µL-1, respectively) ...
    ... respectively) was added to the first and second extracts. Acidic compounds in the third extract were methylated by addition of a diazomethane solution. The methylated extract was purified by fractionation with dichloromethane and methanol (50:50, V/V) through silica-gel in order to remove high polar d ...

  • Analysis of the correlation between modified secondary and primary compression index on the example of old municipal waste in Serbia

    Dragoslav Rakić, Irena Basarić Ikodinović, Jovana Janković, Tina Đurić (2022)
    The paper presents the results related to the determination of the index of primary and maximum and minimum indices of secondary compression, i.e. modified primary and secondary compression indices (Cc, Cc', C'min, C'max), obtained by laboratory testing of artificially prepared municipal waste samples (three series of 9 samples in total) in an oedometer apparatus with a diameter of 20 cm. Old municipal waste was used, which was taken from two landfills in Serbia, one that is ...
    municipal solid waste, secondary compression index, ratio of modified secondary and primary compression index

  • The interaction of organoselenium trans-palladium(II) complexes toward small-biomolecules and CT-DNA

    Vera M. Divac, Aleksandar Mijatović, Marina D. Kostić, Jovana Bogojeski (2017)
    Serija organoselenijum trans-paladijum(II) kompleksa 1 (bis(2-(fenilselanilmetil)oksolan)dihloropaladijum(II)), 2 (bis(2-(fenilselanilmetil)oksan)dihloropaladijum(II)) i 3 (bis(2) ,2-dimetil-3-(fenilselanil)oksan)dihloropaladijum(II)) su korišćeni za ispitivanje reaktivnosti ovog specifičnog tipa kompleksa prema različitim bio-molekulima. Ovaj sistem je od posebnog interesa jer se jako malo zna o supstitucionim reakcijam organoselenijum paladijum(II) kompleksa sa trans konfiguracijom. Zamena koordinovanog hlorida sa serijom malih bio-molekula (l-Met, l-His, l-Cis, GSH i 5′-GMP) proučavana je pod uslovima pseudo-prvog reda kao funkcija koncentracije nukleofila i temperature korišćenjem tehnika zaustavljenog toka. Rezultati za proučavane komplekse ukazuju da ...
    Pd(II), Selen, Substitucija, Kinetika, Mehanizam

  • A Tel Platform Blending Academic And Entrepreneurial Knowledge

    Ivan Obradović, Ranka Stanković, Jelena Prodanović, Olivera Kitanović (2013)
    ... BAEKTEL, a platform founded on OER principles, aimed at blending academic and entrepreneurial knowledge, are outlined. The platform is proposed as a solution for both integrating newly emerged knowledge generated by technological development into academic programs, and updating academic knowledge of ...
    ... newly emerged knowledge generated by technological development into academic programs by renewing the curricula in ever shortening intervals is a solution that is increasingly harder to achieve. Namely, while technology is rapidly developing, changes in academic programs are subject to procedures ...
    ... and freely to educators, students, and self-learners to use and reuse for teaching, learning, and research.” [3] In this paper we propose a solution both for making emerging entrepreneurial knowledge available to students in academic institutions, and for updating academic knowledge ...

  • Microstructural and magnetic properties of electrospun hematite/cuprospinel composites

    Mira Ristić, Aleksandar Kremenović, Michael Reissner, Željka Petrović, Svetozar Musić (2020)
    Phase composition, microstructural and magnetic properties of electrospun hematite/cuprospinel composites were investigated. Samples were synthesized starting with 0 to 10 mol% of copper relative to iron. The round shape of reference electrospun fbres was preserved upon their heating up to 600 °C in air, whereas at 700 °C hollow substructure was additionally formed. In these reference samples the presence of hematite phase was detected by XRPD. A small amount (traces) of Fe3O4 /γ-Fe2O3 was also found, due to the ...
    Electrical and Electronic Engineering, Condensed Matter Physics, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic Materials

  • The number of unimodular roots of some reciprocal polynomials

    Dragan Stankov (2020)
    We introduce a sequence P2n of monic reciprocal polynomials with integer coefficients having the central coefficients fixed. We prove that the ratio between number of nonunimodular roots of P2n and its degree d has a limit when d tends to infinity. We present an algorithm for calculation the limit and a numerical method for its approximation. If P2n is the sum of a fixed number of monomials we determine the central coefficients such that the ratio has the minimal limit. ...
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials

  • Development of an integrated model for open-pit-mine discontinuous haulage system optimization

    Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović (2024)
    equipment selection, mine mechanization, expert judgment, linguistic variables, MCDM, FAHP

  • INVENTS: A Hybrid Mine Ventilation Planning and Design System

    Lilić Nikola, Stanković Ranka, Obradović Ivan (2013)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    hybrid systems, mine ventilation, expert systems
    ... package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation ...
    ... between different phases of the outlined concept, leading to unlimited possibilities for testing different modifications of the system until a final solution satisfying the established criteria is obtained. Planing of required air flow quantities INVENTS ResNet SimVent VENTEX defining basic network ...
    ... VENTEX main interface panel with estimated values and suggestions for possible corrections 4. CONCLUSION In this paper we present an approach to the solution of the mine ventilation planing and analysis problem using a hybrid system composed of three entities: a package for aerodynamic definition of mine ...

  • INVENTS: a hybrid system for subsurface ventilation analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (2000)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    ... package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation ...
    ... between different phases of the outlined concept, leading to unlimited possibilities for testing different modifications of the system until a final solution satisfying the established criteria is obtained. Planing of required air flow quantities INVENTS ResNet SimVent VENTEX defining basic network ...
    ... VENTEX main interface panel with estimated values and suggestions for possible corrections 4. CONCLUSION In this paper we present an approach to the solution of the mine ventilation planing and analysis problem using a hybrid system composed of three entities: a package for aerodynamic definition of mine ...

  • Određivanje sadržaja kiselih funkcionalnih grupa na površini biougljeva primenom Boehm-ovih titracija

    Aleksandar D. Krstić, Aleksandar Đ. Lolić, Marija A. Ilić, Aleksandar M. Mijatović, Snežana J. Zlatanović, Zoran P. Nedić, Vesna M. Pavelkić (2015)
    Biougalj se dobija pirolizom iz organskog otpada. Smatra se ,,modifikatorom'' zemljišta i koristi se kao đubrivo i kao rezervoar za skladištenje ugljenika. Kvantifikacija funkcionalih grupa je važna zbog hemijske reaktivnosti biougljeva koji imaju uticaj na svojstva zemljišta. U istraživanju su korišćena 3 uzorka biouglja različitog porekla i jedan referentni, aktivni ugalj. Sadržaj kiselih funkcionalnih grupa je određivan titracijom po Boehm-u na dva načina: uvođenje N2 tokom titracije i tretman sa BaCl2. Optimizovan je način pripreme tri Boehm ova rastvora ...
    ... BaCl.(1]. The preparation of three Boehm’s solutions was optimized (NaOH, Na:COs, NaHCOs, conc. 0,05 mol/dm*). The preparation of the NaOH standard solution was investigated as well as the method of removing CO: before or during titration which is sensitive in the presence of CO; and dissolved organic ...

  • Značaj izvodjenja Proktorovog opita na komunalnom otpadu

    Jovana Janković, Dragoslav Rakić, Tina Đurić, Irena Basarić Ikodinović, Laslo Čaki (2019)
    Komunalni otpad predstavlja jedan od ključnih problema današnjice. U Srbiji je najčešći vid odlaganja otpada na komunalne deponije i zbog toga je bitno ispravno i sigurno ga skladištiti. Zbijanje komunalnog otpada predstavlja jednu od osnovnih komponenti procesa odlaganja. Kako bi se što bolje predvidelo ponašanje komunalnog otpada neophodno je pre zbijanja na terenu laboratorijski odrediti maksimalnu suvu zapreminsku težinu i optimalnu vlažnost. U dosadašnjoj praksi u svetu za to se koristi standardizovan Proktorov opit. U radu će biti prikazani ...
    komunalni otpad, zbijanje, deponija, Proktorov opit
    ... maksimalnu suvu zapreminsku težinu i optimalnu vlažnost. U u Plandištu. THE IMPORTANCE OF PROCTOR TEST PERFORMANCE ON MUNICIPAL SOLID WASTE ABSTRACT Municipal solid waste management is one of the crucial problems worldwide. In Serbia, the most common forms of waste disposal are municipal landfills ...
    ... author profiles for this publication at: https://www.researchgate.net/publication/340660301 THE IMPORTANCE OF PROCTOR TEST PERFORMANCE ON MUNICIPAL SOLID WASTE Conference Paper · November 2019 CITATIONS 0 READS 19 5 authors, including: Some of the authors of this publication are also working on ...
    ... current practice. This paper presents the results of the Proctor test for municipal waste taken from the dump in Plandište. KEY WORDS: municipal solid waste (MSW), compaction, landfill, Standard Proctor test UVOD kako bi se to izbeglo. Iako se smatra jednim od nepovoljnijih rešenja, odlaganje na ...

  • Defining location and dip of magnetic anomaly sources applying mathematical transformation

    Snežana Ignjatović, Milanka Negovanović (2022)
    It is significant to define the location and dip of anomaly sources during the geophysical exploration (magnetic, gravity, electric, seismic, etc.). In this paper we presented results obtained during magnetic survey. Applying different method of mathematical transformations on magnetic data we can find the position (edge) and dip of magnetic anomaly sources. For successful solution of this problem, we used combination two method tilt derivative and upward continuation. The study area located in the eastern Serbia, north part of ...
    magnetic data, tilt derivative, upward continuation, pluton Valja Strž

  • Microemulsion with aromatic oil as cleaner media for electropolymerisation

    M. Ilić, F.-H. Haegel, S. Zlatanovic, N. Potkonjak, B. Simonovic (2005)
    Abstract Microemulsion polymerization is widely used as a cleaner alternative way to prepare intrinsically conductive polymers. We studied isothermal phase diagrams for microemulsions of the electropolymerizable heterocyclic aromatic oil 3,4-ethylenedioxythiophene (EDOT), aqueous LiClO4 solution and alkyl polyethoxylate. Our specific goal was to assess the effect of LiClO4 salt on the phase behaviour. The phase behaviour was characterized by stepwise titration and microscopic analyses. Here we found that the increase of the concentration of LiClO4 salt shifts the microemulsion region ...
    Микроемулзија, понашање фаза, EDOT, LiClO4

  • Indeksi kontrole održavanja i korišćenja rotornog bagera

    Jovana Mitrović, Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić (2023)
    Razvoj površinske eksploatacije se u velikom stepenu zasniva na svestranoj mehanizaciji rudarskih radova. Kako bi se zadovoljili potrebni kapaciteti, neophodna je primena savremene mehanizacije, velikih kapaciteta i pouzdanosti u radu. Naime, sa stepenom povećanja mehanizovanosti radova smanjuje se broj zaposlenih radnika, povećava produktivnost rada, smanjuju troškovi po jedinici proizvoda, a samim tim i povećava ekonomičnost površinske eksploatacije. Predmet istraživanja su rotorni bageri SRs 1200 koji predstavljaju samohodne mašine kontinuiranog dejstva namenjene za otkopavanje jalovine i korisne supstance na površinskim ...
    rudarstvo, rotorni bager, indeksi održavanja, indeksi korišćenja, TOPSIS

  • Development of integrated fuzzy model for mine management optimization

    Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)
    fuzzy logika, višekriterijumsko odlučivanje, ocenjivanje eksperata
    ... prioritizes mining: safety and pro- 1418 M. Čelebić, S. Bajić, D. Bajić et al. vides an efHicient solution in terms of technical and economic conditions. Finally, and very importantly, the proposed solution needs to be implemented efectively. The ore excavation process and other mining, activities would ...
    ... are highly complex. The deposit is in a carbonate rock environment, including, underlying: and overlying, limestones. The underlying limestones are solid homo- geneous rocks, with numerous fractures and a number of fault zones. Expert experience suggested potential problems for certain types of mining ...
    ... safe mining: technology and a healthy work environment need to be ensured for miners. The paper describes a model used to arrive at an optimal solution for select- ing the appropriate mining; technology. Given that decision making in the case of complicated geological conditions associated with ...

  • Synthesis, characterization and photocatalytic examination of Co0.9Ho0.1MoO4 nanopowders

    Milena Rosić, Maja Milošević, Maria Čebela, Vladimir Dodevski, Vesna Lojpur, Radomir Ljupković, Aleksandra Zarubica (2023)
    ... The photocatalytic activity of acquired Cop.Hop , MoO, nanopowders was estimated by the photocatalytic degradation of crystal violet in aqueous solution. A simple and effective . method for controlling: the composition and morphology of Cop.Hoo,, MoOu is presented in this paper, as well as a p ...
    ... methodology of inorganic synthesis. During photocatalytic · testing nanostructured material CopoHoo,MoOu indicated the possibility of a promising solution in photocatalytic processes towards green chemistry and sustainable development. 1. M. Rosić, A. Zarubica, A. Šaponjic', B. Babić, J. Zagorac ...

  • An intelligent hybrid system for surface coal mine safety analysis

    Nikola Lilić, Ivan Obradović, Aleksandar Cvjetić (2010)