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Упит dcterms_subject_txt:Inorganic Chemistry,General Chemistry

550 items

  • Моделирање утицаја одступања линије најмањех отпора од пројектоване на интензитет потреса од минирања

    Стефан Милановић (2024)
    Према дефиницији линија најмањег отпора представља најкраће растојање од центра минског пуњења до слободне површине. Oвим истраживањем представљен је утицај линије најмањег отпора, као и њеног одступања од пројектоване на интезитет потреса услед минирања. Проблем линије најмањег отпора је веома заступљен у пракси, где се занемарује изглед слободне површине, који може бити врло неправилан. Линију најмањег отпора је потребно мерити целом дужином минске бушотине према слободној површини, иако је у пракси случај да се мери најчешће као растојање од ...
    линија најмањег отпора, 3D модел, потреси услед минирања, минирање, слободна површина, метода раздвојених елемената

  • The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector

    Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković (2020)
    Natural gas is used for the production of almost 20% of total energy today. The natural gas security of the Republic of Serbia is an urgent strategic, political and security issue. Serbia is one of the most vulnerable countries in Southeast Europe, because it only has one supply route. This study is a contribution to efforts to better understand the factors affecting energy security through the implementation of a new methodology based on the fuzzy–AHP synthesis model for measuring ...
    energetska bezbednost, prirodni gas, fazi AHP, AHP višekriterijumska analiza, fazi teorija
    ... providing equal access to energy [9]. In general, energy security is inextricably linked to the national security of a country and as such can be considered in the context of comprehensive security, as well as an independent integral part of a more general term [10]. Energy security determines the ...
    ... performed methodology of the fuzzy–AHP Symmetry 2020, 12, 908 39 of 42 synthesis model for analysis of energy development scenarios can adapt its general character, with adequate indicator analysis, to each individual projection of energy development. Author Contributions: Conceptualization, A.R.M. ...
    ... J.; Maters, H. EU standards for energy security of supply. ECN/Clingendael International Energy Program Pattern; European Commission, Directorate-General for Energy and Transport: The Hague, The Netherlands, 2007. 24. Gupta, E. Oil vulnerability index of oil-importing countries. Energy Policy 2008, ...

  • Kvantitativna ocena režima i bilansa podzemnih voda u aluvijonu Velike Morave od Bagrdana do ušća u Dunavu

    Aleksandar Balubdžić (2024)
    Aluvijalni sedimenti velikih reka raspolažu značajnim količinama podzemnih voda, što je zajedno sa površinskim vodama dozvolilo razvoj naselja i ljudskih aktivnosti. Ovaj razvoj uslovljava veće potrebe za vodnim resursima i njihovim kvalitetom. Sa povećanjem eksploatacije podzemnih voda, uticaj iste je značajniji i može da dovede do opadanja nivoa podzemnih voda i pogoršanja kvaliteta. Aluvijon Velike Morave ima značajno rasprostranjenje, usled čega predstavlja važno ležište izdanskih voda sa velikim eksploatacionim mogućnostima. Izradom hidrodinamičkog modela aluvijona Velike Morave od Bagrdana do ...
    režim podzemnih voda, bilans podzemnih voda, intergranularna izdan, hidrodinamički model
    ... 6.3.4. Granični uslov generalnog nivoa na granici (eng. „General head boundary“ ili GHB) Po stranama modela, na granicama između „neaktivnih“ („no flow*) ćelija i aktivnih ćelija, zadat je granični uslov generalnog nivoa (eng. „General head boundary*). Granični uslov tipa GHB je u matematičkom ...
    ... 29 6.3.3. Granični uslov efektivna infiltracija...aaaaaaaaaaaaa n aeneaaoanaataci 31 6.3.4. Granični uslov generalnog nivoa na granici (eng. ,, General head boundary“ ili [7 /: ) RRRAAAAAA 31 6.4. Etaloniranje hidrodinamičkog modela ...........čaaaaaaa a aeaaataakakaaoi 31 6.5. Rezultati dobijeni ...

  • Application of machine learning for diagnosing the operation of a deep well pump in oil production

    Maja Trikić (2024)
    This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.
    deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost
    ... The surface dynamogram represents a function formed by a closed curve of measured values of load and stroke of the smooth rod, defined by the general function(F(t) = f(S(t)). Here, the abscissa shows the variation in the stroke of the smooth rod over one cycle of the deep well pump operation ...
    ... 2.1. Operating principle Flow sensors operate based on different principles, depending on the type of sensor and application requirements. The general goal of these sensors is to convert the mechanical flow of a fluid into an electrical signal that can be analyzed and interpreted. Based on the ...
    ... samples); the third part shows the results of models trained on a large dataset (40,078 samples); and the final part presents the best model and general conclusions. 6.6.1 Experimentation procedures For conducting the experiments, the following descriptors were used: Fourier descriptors (with ...

  • Keyword-Based Search on Bilingual Digital Libraries

    Ranka Stanković, Cvetana Krstev, Duško Vitas, Nikola Vulović, Olivera Kitanović (2017)
    This paper outlines the main features of Biblisha, a tool that offers various possibilities of enhancing queries submitted to large collections of aligned parallel text residing in bilingual digital library. Biblishsa supports keyword queries as an intuitive way of specifying information needs. The keyword queries initiated, in Serbian or English, can be expanded, both semantically, morphologically and in other language, using different supporting monolingual and bilingual resources. Terminological and lexical resources are of various types, such as wordnets, electronic ...

  • Primena AHP и WoEmetode u proceni podložnosti terena na kliženje za područje opštine Krupanj

    Biljana Abolmasov, Jelka Krušić, Katarina Andrejev, Miloš Marjanović, Ranka Stanković, Uroš Đurić (2017)
    ... images. Both models have relatively good performance, but WoE has slightly better va- lidation parameters. These results are a solid background for general overview of the landslide susceptibility distribution at municipality scale, and can be successfully used for further landsli- de risk assessment ...

  • Značaj geografske širine za lociranje uzročnika magnetnih anomalija kod prospekcije arheoloških lokaliteta

    Vesna Cvetkov (2020)
    ... magnetic data over settlement structures by inverse modelling. Archaeological Prospection 4, 4, Special Issue: Europen Geophysical Society XXII General Assemgly: 165- 177. Eppelbaum, L. V., Khesin, B. E, Itkis S. E. 2001. Prompt magnetic investiga- tions of archaeological remains in areas of inf ...

  • Application of the VIKOR Method for Selecting the Purpose of Recultivated Terrain after the End of Coal Mining

    Radmila Gaćina, Sanja Bajić, Bojan Dimitrijević, Tomislav Šubaranović, Čedomir Beljić, Dragoljub Bajić (2024)
    reclamation, coal, sustainable development, multi-criteria decision making, VIKOR method

  • Održivo korišćenje mađarsko-srpskih međugraničnih vodnih tela

    Dušan Polomčić, Zoran Stevanović, Saša Milanović, Stanko Sorajić, Bojan Hajdin, Željko Kljajić (2010)
    ... modelu istražnog podru ja zadavani su slede i grani ni uslovi: • infiltracija padavina • evapotranspiracija • opšti nivo podzemnih voda (engl. "General Head Boundary") • granica zadatog kapaciteta • grani ni uslov "drenaža" (engl. "Drainge Boundary") • granica konstantnog potencijala • grani ...
    ... modelu istraznog podrucja zadavani su slede¢i grani¢ni uslovi: e infiltracija padavina © evapotranspiracija © opSti nivo podzemnih voda (engl. "General Head Boundary") granica zadatog kapaciteta grani¢ni uslov "drenaza" (engl. "Drainge Boundary") granica konstantnog potencijala grani¢ni uslov reka ...

  • A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach

    Nikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    fuzzy logic, max-min composition, continuous part of combined system (CCS), open pit, mining, dependability

  • Demise of the Wetterstein Carbonate Platform and onset of the Dachstein Carbonate Platform recorded in deep-water successions of the East Bosnian-Durmitor megaunit (Pliješevina, northern Montenegro, Dinarides)

    Milica Mrdak, Eva Wagerer, Milan Sudar, Nevenka Djerić, Martin Đaković, Hans-Jürgen Gawlick (2024)
    Triassic, Carnica event, clay mineralogy, conodont biostratigraphy, Neo-Tethys

  • Tectonic evolution of the Circum-Moesian orocline of the Carpatho-Balkanides: Paleomagnetic constraints

    Emő Márton, Vesna Cvetkov, Miodrag Banješević, Gábor Imre, Aleksandar Pačevski (2024)
    Apuseni-Banat-Timok-Srednogorie belt, danubicum, paleomagnetism, oroclinal bending

  • Centar za hidrogeologiju karsta - 15 godina nauke i struke

    urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović (2023)
    Centar za hidrogeologiju karsta
    ... task. It is similar to the role of the reviewers. The essential facts should be stated concretely and concisely. In addition, give the signatory's general assessment of the work, which the reader will then study in more detail and take his own personal, often different, position. This task is someWhat ...
    ... Wells, Therms, and Mineral Waters). Srpska knjizevna zadruga (Serbian Literary Guild), no.42, 152 p., Belgrade Stepanović B., 1962: Principles of general hydrogeology (in SER), Geozavod, Spec. ed. vol. 11, Belgrade. Stevanović Z., 1997: First studies of Eastern Serbian karst by Jovan Cvijic – basis ...
    ... In addition to research on hydrogeological CKH also conducts all research and monitoring of karst springs, springs and surface watercourses in general. For the needs of these, the CKH owns a number of different equipment, and also carries out purpose-built equipment for the needs of certain research ...

  • Процена ризика од загађивања водних ресурса под утицајем напуштених рударских радова на простору Србије

    Nebojša B. Atanacković (2018-08-31)
    Велики број напуштених рударских радова и ограничена средства за рекултивацијуи ремедијацију деградираних простора подстакле су развој метода за издвајањеприоритетних локација на које је потребно усмерити даља истраживања. У датомконтексту, у склопу израде дисертације спроведене су научно-истраживачкеактивности које су за предмет имале анализу утицаја значајнијих напуштенихрударских радова на водне ресурсе на простору Србије јужно од Саве и Дунава.Разматрање предметне проблематике извршено је кроз развој и примену семи-квантитативне методологије за анализу ризика од загађивања површинских иподземних вода на регионалној размери. Примењена ...
    анализа ризика, водни ресурси, водна тела, рудничке воде, рударскиотпад, аналитички хијерархијски процеси, кластер анализа, математичка теоријаатрибута, функције припадности, семи-квантитативне методе
    ... Докторска дисертација 233 ЛИТЕРАТУРА 1. Alpers C.N., Blowes D.W., Nordstrom D.K., Jambor J.L. (1994а) Secondary minerals and acid-mine water chemistry. Short course handbook on environmental geochemistry of sulfide mine wastes. Mineralogical Assoc of Canada, Waterloo. 2. Alpers C.N., Nordstrom ...
    ... Waste, Orta, May 27-28, 2002, EU Joint Research Centre, p 69-72. 27. Davis A. (2003) A Screening-Level Laboratory Method to Estimate Pit Lake Chemistry. Mine Water and the Environment 22: 194–205. doi 10.1007/s10230- 003-0022-y 28. Davis A. and Eary L.E. (1997) Pit lake water quality in the Western ...
    ... Güler C., Thyne G.D., McCray J.E. and Turner A.K. (2002) Evaluation of graphical and multivariate statistical methods for classification of water chemistry data, Hydrogeology Journal 10, Pp. 455-474. 61. Gzyl G. & Banks D. (2007) Verification of the “first flush” phenomenon in mine water from coal ...

  • Mineralni i hemijski sastav čestica u atmosferi zone Kolubarskog basena i uticaj na životnu sredinu

    Željko R. Cvetković (2013-11-18)
    Čestice iz vazduha su prikupljane u blizini termoelektrane i površinskih kopovarudnika uglja u Kolubarskom basenu. Izmereni srednji sadržaji koncentracija rastvornih,nerastvornih i ukupnih taložnih materija na godišnjem nivou prelaze 200 mg/m2dan (K-1, K-3, K-4, K-5). Distribucija čestica na svim lokacijama klasifikovana je na česticeveličine veće od 10 μm, zatim na čestice veličine od 10 μm do 2,5 μm i klase česticaveličine ispod 2,5 μm. Ovakva podela je dala odnos koncentracija inhalatornih irespiratornih čestica po mernim mestima. Skenirajuća elektronska mikroskopija jepokazala ...
    mineral, četica, prašina, leteći pepeo, aerosediment, PM10, teški metali,koncentracija, veličina čestice, Kolubara
    ... Health Criteria 61, IPCS/WHO, Geneva, Switzerland. IPCS (1991): Environmental Health Criteria 118, inorganic mercury World Health Organisations, Geneva, Switzerland IPCS (1995): Inorganic lead Intemationale Programe on Chemical Safety, Environmental Chealth criteria 165 World Chelath Organisations ...
    ... Clarke, A. G. (1992). The Atmosphere. In: Understanding Our Environment: An Indroduction to Environmental Chemistry and Pollution (Harrison, R. M., Ed), Second Edition, Royal Society of Chemistry, Cambridge, pp. 5-51. Željko R. Cvetković Mineralni i hemijski sastav čestica u atmosferi zone Kolubarskog ...
    ... of Atmospheric Chemistry, Princetion University Press, Princeton, pp. (146-156), New Jersey. Janković, N. i Janković, T. (1998) Ugalj u sedimentnim stenama Kolubarskog basena., 13 kongres geologa Jugoslavije, knjiga 4, 217-224. Herceg Novi. Jange, C. E., (1963). Air Chemistry and Radioactivity ...

  • Mineralni i hemijski sastav čestica u atmosferi zone Kolubarskog basena i uticaj na životnu sredinu

    Željko R. Cvetković (2013-11-18)
    Čestice iz vazduha su prikupljane u blizini termoelektrane i površinskih kopovarudnika uglja u Kolubarskom basenu. Izmereni srednji sadržaji koncentracija rastvornih,nerastvornih i ukupnih taložnih materija na godišnjem nivou prelaze 200 mg/m2dan (K-1, K-3, K-4, K-5). Distribucija čestica na svim lokacijama klasifikovana je na česticeveličine veće od 10 μm, zatim na čestice veličine od 10 μm do 2,5 μm i klase česticaveličine ispod 2,5 μm. Ovakva podela je dala odnos koncentracija inhalatornih irespiratornih čestica po mernim mestima. Skenirajuća elektronska mikroskopija jepokazala ...
    mineral, četica, prašina, leteći pepeo, aerosediment, PM10, teški metali,koncentracija, veličina čestice, Kolubara
    ... Health Criteria 61, IPCS/WHO, Geneva, Switzerland. IPCS (1991): Environmental Health Criteria 118, inorganic mercury World Health Organisations, Geneva, Switzerland IPCS (1995): Inorganic lead Intemationale Programe on Chemical Safety, Environmental Chealth criteria 165 World Chelath Organisations ...
    ... Clarke, A. G. (1992). The Atmosphere. In: Understanding Our Environment: An Indroduction to Environmental Chemistry and Pollution (Harrison, R. M., Ed), Second Edition, Royal Society of Chemistry, Cambridge, pp. 5-51. Željko R. Cvetković Mineralni i hemijski sastav čestica u atmosferi zone Kolubarskog ...
    ... of Atmospheric Chemistry, Princetion University Press, Princeton, pp. (146-156), New Jersey. Janković, N. i Janković, T. (1998) Ugalj u sedimentnim stenama Kolubarskog basena., 13 kongres geologa Jugoslavije, knjiga 4, 217-224. Herceg Novi. Jange, C. E., (1963). Air Chemistry and Radioactivity ...

  • Strain partitioning in a large intracontinental strike-slip system accommodating backarc-convex orocline formation: The Circum-Moesian Fault System of the Carpatho-Balkanides

    Nemanja Krstekanić, Liviu Matenco, Uroš Stojadinović, Ernst Willingshofer, Marinko Toljić, Daan Tamminga (2022)
    oroklini, raspodela deformacija, transkurentna kretanja, Karpato-balkanidi, Cirkum-mezijski rasedni sistem
    ... Change 208 (2022) 103714 2 et al., 2011; De Vicente et al., 2009; Glen, 2004; Krézsek et al., 2013), we use the term strain partitioning in its general meaning of a multi-scale distribution of the total strain in different types of coeval structures whose kinematics cannot be explained by a homogenous ...
    ... indicates exhumation and block-tilting (Figs. 8, 3g). At the outcrop scale, there is a large variability of the observed senses of shear, but in general, both N- and S- dipping conjugated sets of normal faults are observed (Fig. 8). Defor- mation along these normal faults is characterized by striated ...
    ... Schmid, 2005; Matenco and Schmid, 1999; Schmid et al., 1998, 2020; Vangelov et al., 2013). This extensional exhumation is an effect of the same general rotation and translation of the Dacia mega-unit, which was significantly rotated around the Moesian Platform already by the end of Eocene, as shown ...

  • Хидрогеохемијске карактеристике и квалитет вода слива Требишњице, Република Српска, Босна и Херцеговина

    Dragoslav R. Banjak (2016-08-25)
    Упркос неповољном временском и просторном распореду, воде су најзначајнијиприродни ресурс Источне Херцеговине. Ова чињеница довела је до реализацијепројекта „Вишенамјенског хидросистема Требишњица“, којим је, премаМилановићу (2006), до сада обухваћено: седам хидроелектрана, шестакумулација, шест брана, шест тунела укупне дужине 59,7 km, неколикоприступних тунела, 62,5 km бетонског канала кроз Попово поље, канал крозДабарско (6750 m) и Фатничко поље (2770 m) и систем тунел-канал или цјевоводпрема Дубравама.У почетку са доминантним енергетским предзнаком, концепција јетрансформисана у интегрално рјешење вишенамјенског коришћења и заштитевода и животне ...
    хидрогеохемијски процеси, мултиваријантна статистичкаанализа, инверзно геохемијско моделовање, квалитет воде, употребиљивост водеза наводњавање, слив Требишњице
    ... 14. Garrels, R.M., Mackenzie, F.T. (1967), Origin of the chemical composition of some springs and lakes, American Chemical Society, Advances in Chemistry Series no. 67, Pages 222–242 15. Glynn D.P., Plummer N. (2005), Geochemistry and the understanding of ground-water system, Hydrogeology Journal ...
    ... 17. Güler C., Thyne D.G., McCray E.J., et al. (2002), Evaluation of graphical and multivariate statistical methods for classification of water chemistry data, Hydrogeology Journal, Volume 10, No 4, Pages 455-474 18. Davis C.J. (2002), Statistics and Data Analysis in Geology, University of Kansas ...
    ... it is evident that in the river Trebišnjica catchment, the optimal conditions for analyses, probabilities, optimalisation of the resources and in general bringing managing decisions in the area of water quality, have not been made. The main factors which determine water chemical composition and their ...

  • Extensive vibrations of the belt conveyer drive electromotor of a bucket wheel excavator as a result of intesified wear-and-tear of its mount support

    Vesna Damnjanović, Predrag Jovančić, Snežana Aleksandrović (2017)

  • Integracija heterogenih tekstualnih resursa

    Ranka Stanković, Ivan Obradović (2007)
    U radu je opisan pristup integraciji heterogenih tekstualnih resursa za srpski jezik uz pomoć jednog kompleksnog softverskog alata, razvijenog specijalno za ove potrebe. Opisani su struktura i osnovne komponente razvijenog sistema. Iznete su i mogućnosti unapređivanja resursa međusobnom razmenom informacija, koje pruža razvijeno integrisano okruženje. Konačno, opisana je i mogućnost primene integrisanih heterogenih resursa za proširenje upita, kao i pretraživanje tekstova uopšte, a naznačeni su i neki od pravaca daljeg razvoja.
    ... from the wordnet. Finally, we explain how integrated heterogeneous resources can be used for query expansion, as well as for searching texts in general. Further development is aimed at implementation of new functions, but also of a web application where part of the functions of WS4LR would be accessible ...