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Упит dcterms_subject_txt:phase composition

317 items

  • Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels

    Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković (2023)
    drilling fluid formulation, upstream oil and gas, fluid dynamics, fluid loss control, gel

  • P-T analiza RMU Bitola – krupne klase

    Nemanja Dobrosavljević (2024)
    Cilj ovog diplomskog rada je bio ispitivanje mogućnosti i tehnologije čišćenjauglja, kao i predstaviti rezultate pliva – tone analize koja ima za cilj ocenu mogućnosti čišćenja uglja - krupnih klasa posmatranog uzorka. Da bi se ispitivanje i analiza mogućnosti čišćenja rovnog uglja u REK Bitola uspešno priveli kraju, moralo se uraditi uzorkovanje reprezentativnog uzorka iz koga se potom izdvaja prvi deo koji služi za određivanje sadržaja vlage. Pored tog dela iz uzorka se izdvaja i drugi njegov deo koji će ...
    ugalj, lignit, Bitola, PT analiza, pliva-tone analiza, čišćenje uglja, suvi ugalj, vlažan ugalj, pepeo, donja toplotna moć, čist ugalj, jalovina, bilans
    ... for determining the granulometric composition. At the end, a part ofthe sample is separated from the sampled pit coal for PT analysis. After sampling the pit coal and dividing it into segments for further analysis, an analysis of its granulometric composition was performed, using standard and non- ...

  • 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
    ... (2003). Phase-mineral and chemical composition of coal fly ashes as a basis for their multicomponent utilization. 1. Characterization of feed coals fly ashes, Fuel 82, 1793-1811. Vassilev, V. S., Menendez, R., Borrego, D. A., Diaz-Somoano, M. and Martinez- Tarazona, R. M. (2004). Phase-mineral ...
    ... l and chemical composition of coal fly ashes as a basis for their multicomponent utilization. 3. Characterization of magnetic and chair concentrates, Fuel 83, 1563-1583. Vassilev, V. S. and Menendez, R. (2005a). Phase-mineral and chemical composition of coal fly ashes as a basis for their m ...
    ... residues, Fuel 84, 973-991. Vassilev, V. S., Vassileva, G. C., Karayigit, I. A., Bulut, Y., Alastuey, A and Querol, X. (2005b). Phase-mineral and chemical composition of fractions separated from composite fly ashes at the Soma power station, Turkey., International Journal of Coal Geology 61, 65-85 ...

  • 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
    ... (2003). Phase-mineral and chemical composition of coal fly ashes as a basis for their multicomponent utilization. 1. Characterization of feed coals fly ashes, Fuel 82, 1793-1811. Vassilev, V. S., Menendez, R., Borrego, D. A., Diaz-Somoano, M. and Martinez- Tarazona, R. M. (2004). Phase-mineral ...
    ... l and chemical composition of coal fly ashes as a basis for their multicomponent utilization. 3. Characterization of magnetic and chair concentrates, Fuel 83, 1563-1583. Vassilev, V. S. and Menendez, R. (2005a). Phase-mineral and chemical composition of coal fly ashes as a basis for their m ...
    ... residues, Fuel 84, 973-991. Vassilev, V. S., Vassileva, G. C., Karayigit, I. A., Bulut, Y., Alastuey, A and Querol, X. (2005b). Phase-mineral and chemical composition of fractions separated from composite fly ashes at the Soma power station, Turkey., International Journal of Coal Geology 61, 65-85 ...

  • Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia

    Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin (2013)

  • Arhitektonsko-građevinski kamen Crne Gore, stanje i potencijali

    Darko Božović, Vladimir Simić (2023)
    arhitektonsko-građevinski kamen, rezerve, kvalitet, potencijalnost

  • 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
    ... data processing. The uneven distribution of sampling sites (155 groundwater samples) had an impact on determining the origin of the chemical composition of groundwater, wherein the grouping of the occurrences from a hydrogeological point of view, represented an important method in the research ...
    ... A detailed analysis of the physicochemical properties of groundwater defined the basic processes, which affected the formation of the chemical composition of groundwater. The methodology of statistical analysis was applied to determine the parameters which impact the distribution of naturally occurring ...
    ... Karst hydrogeology and karst environment protection. Guilin, China. pp. 369 – 373. 169 88. Krešić N, Papić P. 1990. Specific chemical composition of karst groundwater in the Ophiolite Belt of the Yugoslav Inner Dinarides: A case for covered karst. Environ. Geol. 15: 131 – 135. 89. Kruskal ...

  • Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs

    Saša Milanović, Ljiljana Vasić (2021)
    Earth and Planetary Sciences (miscellaneous), Water Science and Technology

  • Production of morphological dictionaries of multi-word units using a multipurpose tool

    Ranka Stanković, Ivan Obradović, Cvetana Krstev, Duško Vitas (2011)
    The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...
    electronic dictionary, Serbian, morphology, inflection, multi-word units, noun phrases, query expansion
    ... we realized that the answers obtained automatically in support of manual production of MWU lemmas can also help in detection of the syntactic composition of a MWU and therefore indicate the appropriate inflectional transducer. Namely, the MWUs in Serbian have predictable basic structures. For instance ...
    ... who prepares the list of input lemmas. There are various debugging tools and preference selections at user’s disposal. In the strategy development phase the user can compare the results obtained by the use of various strategies on the same MWU input list. The user may also filter the results and obtain ...
    ... process [14]. We would like to point out another interesting aspect of MWUs which can be exploited in the processing of named entities, as the initial phase in information extraction. Serbian morphological dictionaries and local grammars are successfully being used for recognition of names of persons ...

  • Компарација метода XRF i ICP-MS на узорцима угља и продуктима сагоревања

    Бранко Костић, Ксенија Ераковић, Дејан Прелевић, Сабина Ковач, Драгана Животић (2023)
    геохемија, угаљ, продукти сагоревања, XRF, ICP-MS

  • Stepen metamorfizma metaklastita rudnika

    Vanja Ćuk (2024)
    Zadatak ovog rada je bio, potvrda saznanja da se na planini Rudnik dogodio kontaktni metamorfizam gornjokrednih sedimentnih stena i da se ispita intenzitet kontakto-metamorfnih promena. Posle kraćeg opisa geografskog položaja, pregleda ranijih istraživanja i geologije šireg područja, usmerena je pažnja na petrološka ispitivanja metaklastita i na kontaktno-metamorfne facije. Usled stvaranja različitih vulkanogenih facija odnosno usled vulkanskih erupcija, delovanjem zagrejane magme (lave) ili zagrejanih fluida, došlo je do kontaktnog metamorfizma, na granici oligocen-miocen i do stvaranja različitih metamorfnih stena, a ...
    Kontaktni metamorfizam, Rudnik, metakonglomerati, metapeščari, metaalveroliti

  • Analysis Of the Process Of Carbon Capture Utilization And Storage In Underground Reservoirs

    John Nyame (2024)
    The importance of mitigating the effects of global climate change has necessitated an in-depth exploration of innovative strategies to reduce carbon dioxide (CO2) emissions. Among these strategies, Carbon Capture, Utilization, and Storage (CCUS) has emerged as a promising and transformative solution. This master thesis delves into the diverse realm of CCUS processes, aiming to unravel the positives challenges, and opportunities within this dynamic field. The analysis begins with a systematic examination of carbon capture technologies, encompassing post-combustion, pre-combustion, and oxy-fuel combustion ...
    Carbon Capture, Utilization and Storage
    ... recovery by repressurizing the reservoir [66]. Oil displacement is dependent on the phase behavior of CO» and crude oil mixtures that are strongly dependent on reservoir temperature, pressure and crude oil composition. These mechanisms range from oil swelling and viscosity reduction for injection of ...
    ... it is necessary to use accurate representations of the phase behavior, density, and viscosity of CO:> and CO-»- containing mixtures in the design of the pipeline [84]. Carbon dioxide is likely to be transported in its dense phase (phase temperatures usually around 31.1%C and above critical pressures) ...
    ... pressure difference across the membrane drives the permeation process. The material of the membrane in addition to its configuration, morphology, composition, and operating conditions are all key factors that dictate its CO- performance to a great extent [41]|. Membrane separation for the removal of ...

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

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)
    ... coal properties is essential for reli- able operational mine planning [8]. Generally two types of grade variability exist in the coal chemical composition (fig. 1): – long-term variability as measured by trends of monthly or longer duration, and – operational variability is generally measured by short ...
    ... planning or stocking process, since the dispersion characteris- tics of the original data are maintained. Coal quality control at the mine planning phase Mine planning is based on reliable estimates of coal grades of future mining blocks. Consequently, in order to develop any coal quality control strategy ...
    ... Coal quality cannot be controlled without some information about possible qualities of future mining blocks. The control of coal quality at the mine phase is usually planned from in-situ coal parameters which are estimated from coal samples. These samples are commonly used to generate maps of in-situ ...

  • 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
    ... evidenced but intervention is not suggested for the investigated areas. Lastly, non-target screening analysis revealed a high div- ersity in chemical composition and a wide spectrum of organic contaminants comprising pharmaceuticals, technical additives, personal care products and pes- ticides. Some of the ...
    ... water samples were filtered through pre-cleaned What- man GF/F filters (0.45 mm) in order to remove suspended particulate matter from the aqueous phase. Sediment samples. Surface sediment samples were taken at the same five sampling loc- ations along the Danube and the Sava Rivers in Serbia (see ...
    ... h with a CDD-6A conductivity detector. A mixture of sodium carbonate and sodium bicarbonate in water (1.8:1.7 mole ratio) was used as the mobile phase at a flow rate of 1.5 mL min-1. The injection volume was 100 µL. For ____________________________________________________________________________ ...

  • Determination of the groundwater-leakage mechanism (binary mixing) in a karstic dam site using thermometry and isotope approach (HPP Visegrad, Bosnia, and Herzegovina)

    Ljiljana Vasić, Saša Milanović, Anita Puskás-Preszner, Laszlo Palcsu (2020)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Valorization of non-balanced coal reserves in Serbia for underground coal gasification

    David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)
    In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...
    ugalj, gasifikacija, zaštita životne sredine, skladištenje, solarna
    ... If these layers are more pronounced, the subsidence from the surface to the depths is less manifested with increasing depth of recovery. If the composition of the bottom of the layer, and especially the roof layers for gasification, is suitable, this significantly mitigates the overall possible field ...

  • Bridging Computational Lexicography and Corpus Linguistics: A Query Extension for OntoLex-FrAC

    Christian Chiarcos, Ranka Stanković, Maxim Ionov, Gilles Sérasset (2024)
    OntoLex, dominantni standard zajednice za mašinski čitljive leksičke resurse u kontekstu RDF-a, Linked Data i tehnologija Semantičkog veba, trenutno se proširuje sa posebnim modulom za Frekvencije, Primere i Informacije zasnovane na Korpusu (OntoLex-FrAC). Predlažemo novi komponent za OntoLex-FrAC, koji se bavi inkorporacijom korpusnih upita za (a) povezivanje rečnika sa korpusnim mašinama, (b) omogućavanje RDF baziranih web servisa da dinamički razmenjuju korpusne upite i podatke odgovora, i (c) korišćenje konvencionalnih upitačkih jezika za formalizaciju unutrašnje strukture kolokacija, skica reči i ...
    standardizacija, digitalna leksikografija, OntoLex, upiti korpusa, povezani podaci, Lingvistički povezani otvoreni podaci

  • SrpELTeC: A Serbian Literary Corpus for Distant Reading

    Ranka Stanković, Cvetana Krstev, Duško Vitas (2024)
    U članku je predstavljen SrpELTeC, korpus razvijen u okviru akcije COST Distant Reading for European Literary History (CA16204). Svi romani u SrpELTeC-u su odabrani, pripremljeni i obeleženi korišćenjem zajedničkih principa uspostavljenih za sve jezičke zbirke u Evropskoj zbirci književnog teksta (ELTeC). Navedeni su izazovi i rešenja u pripremi SrpELTeC od nule. Svi romani su ručno kodirani u TEI sa bogatim metapodacima i strukturnim napomenama. Automatska anotacija je uključivala POS-označavanje, lematizaciju i imenovane entitete, oslanjajući se na resurse za obradu ...
    digital humanities, Serbian literature, text corpora, distant reading , linked data, named entity recognition, text analytics

  • 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

  • Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings

    Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić (2018)
    ... and belongs to Kolubara District. The limestone deposit Nepričava consists of rock masses of sedimentary origin, not entirely homogeneous in composition. Limestones are the most important lithological members from both economic aspect and aspect of mining exploitation technology. Physical and mechanical ...