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Упит dcterms_subject_txt:static properties

364 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

  • Димензионисање система завојних пумпи

    Марија Дивац (2024)
    Овај завршни рад се бави димензионисањем система завојних пумпи (Progressive Cavity Pumps - PCP) које се широко користе у нафтној и гасној индустрији, нарочито за подизање тешких и вискозних флуида. Завојне пумпе су се показале као ефикасно решење у бушотинама са сложеним условима,захваљујући својој способности да транспортују флуиде са високим садржајем чврстих честица и гаса.Рад обухвата анализу кључних параметара као што су вискозност, густина, дубина бушотине и притисак, који су пресудни за избор одговарајуће пумпе.Применом софтверског алата извршена је ...
    завојне пумпе, димензионисање, експлоатација нафте, вискозни флуиди, софтверска симулација, PCP пумпе
    ... 809.878 121.3612 9.1694 0.0254 & tEdit'Black Oil' B x FLUID Name: Black Oil Save as template Description: Properties | Viscosity | Calibration | Thermal STOCK TANK PROPERTIES CONTAMINANT MOLE FRACTIONS Watercut v 80 % ~ CO2fraction: 0.068 GOR Y 18.2692 sm3/sm3 ~. H2S fraction: 0 Gas ...
    ... y3HMa y 003Hp rycCTHHy, BHCKO3HTCT, IIpHTHCaK H TeMIIepaTyPpy. & Edit Black Oil' B x FLUID Name: - |BlackOil Save as template Description: Properties Viscosity | Calibration | Thermal UNDERSATURATED OIL MIXTURE Correlation: Vasquez & Beggs +| Emulsion viscosity method: Set to viscosity of the ...

  • A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)

    Jelena Ratković, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin (2016)
    ... comprises coal beds, fine Miocene sands, silt and clay. 3. METHODOLOGY A hydrogeologic model is an interpretation of the dynamic and physical properties of a hydrogeologic system (American Society for Testing and Materials, 2014). According to Polomčić (2001), a hydrologic system is determined by: ...
    ... inter-dependent. The characteristics of a hydrogeologic system are its geometry (i.e. spatial distribution of water-bearing media) and filtration properties. Hydrogeologic modeling is schematization of the hydrogeologic system, due to the hydrogeologic and hydrodynamic complexity of the conditions, ...

  • FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina

    Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević (2021)
    ... due to its specific physical and chemical properties, such as cation exchange capacity (CEC), large surface area, high pore volume, high swelling ability, etc. Intercalation of organic complexes into montmorillonite layers changes surface properties from hydrophilic to hydrophobic. The results ...

  • Минерагенија зеолитских туфова Србије

    Vladan Kašić (2018-02-05)
    Лежишта наших зеолитских туфова (Златокоп, Игрош, Јабланица 1, Беочин, Топоница и Сланци) која су овде била предмет детаљних истраживања, просторно и генетски везана су за вулканске и вулканокластичне стене маринских средина сенонске и неогенске старости и језерске седименте неогене старости и настала су као продукт девитрификације вулканског стакла.Током лабораторијских испитивања при изради ове докторске дисертације, примењене су следеће аналитичке методе: оптичка испитивања петрографских препарата; рендгенска дифракција праха (XRD); скенирајућа електронска микроскопија (СЕМ метода); хемијска карактеризација зеолитских туфова у оквиру ...
    минерагенија, зеолитски туф, Србија, клиноптилолит, хојландит
    ... icle/pii/S1387181103003767 153 International Conference on the Occurrence, Properties and Utilization of Natural Zeolite, Naples, Italy, 324-326. Galabova I.M., Haralampiev G.A.(1988):Occurrence, Properties and Utilization of Natural Zeolites., In D. Kallo and H. S. Sherry, Eds., AkademiaiKiado ...
    ... multipurpose filters for upgrading effluent ammonia quality under peak loads, Water Sci. Technol., 37, 235-242. Benashvili E. M. (1988): Occurrence, Properties and Utilization of Natural Zeolites. In D. Kallo and H. S. Sherry, Eds., Akademiai Kiado, Budapest, 589-597. Bowman R.S., Haggerty G.M., Huddleston ...
    ... com/science/article/pii/S0273122397001133 http://www.sciencedirect.com/science/article/pii/S0273122397001133 152 Conference on the Occurence, Properties and Utilization of natural Zeolite, Naples, Italy, 81- 83. Burges, P. A., Mc George, W. T., (1926): Zeolite formation in solils. Science, v.64 ...

  • A Mathematical Learning Environment Based on Serbian Language Resources

    Radojičić Marija, Obradović Ivan, Stanković Ranka, Utvić Miloć, Kaplar Sebastijan (2018)
    In recent years, in line with ever growing usage of Information technology, the learning environments are changing. The amount of available learning materials in various forms has increased. These new environments demand comprehensive learning systems, which enable management of the learning corpus with special attention paid to relevant lexical resources. In this paper we present the concept of a Mathematical Learning Environment in Serbian (MLES), which is based on a corpus of mathematical materials and various lexical resources, enabling ...
    mathematical content, text processing, mathematical formulae
    ... Annotation also alleviates the statistical analysis of the corpus, namely automatic assignment of the distribution of annotated linguistic properties. 5. APPLICATION TERMI The Termi application has recently been launched to serve as a support for the development of terminological dictionaries ...
    ... updating terms either only in Serbian, or only in the English, or simultaneously in both languages. Term modification implies changes of the very properties of the term (name, abbreviation, synonyms and description) as well as modification of external connections of the term with the existing b ...

  • Groundwater gravitational circulation of Karst Veliko Vrelo and Malo Vrelo springs by isotope and the noble gas method: case study of the Beljanica Massif

    Ljiljana Vasić, Laszlo Palcsu, Huang Fen (2019)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry

  • Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules

    Svetlana Melentijević, Zoran Berisavljević, Dušan Berisavljević, Claudio Olalla Marañón (2024)
    The stability analysis of homogeneous rock slope following the Hoek–Brown failure criterion under the hypothesis of different flow rules is performed based on limit equilibrium and finite element methods. The applied failure criterion is the generalized Hoek–Brown that can be introduced as a shear/normal function in analysis applying different flow rules. The results are compared with those obtained by the application of equivalent shear strength parameters of the Mohr–Coulomb criterion, considering that this is still the most widely used ...
    Kružna klizna površ, Huk-Braunov kriterijum loma, Kriterijum popuštanja, Smičuća/normalna funkcija, Nivo napona, Verovatnoća i parametarska analiza

  • Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles

    Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović (2013)
    Kinetika i mehanizam reakcija supstitucije između [Ru(trpi)(bpi)Cl]+ sa nukleofilima gvanozin-5′-monofosfatom, L-histidinom, tioureom i dimetilsulfoksidom proučavani su spektrofotometrijski u 0,1 M NaClO4 na 310 K. Red reaktivnosti za odabrane ligande je: tiourea > gvanozin-5′-monofosfat > L-histidin > DMSO. Ovaj red je povezan sa elektronskim, strukturnim i hemijskim karakteristikama kompleksa i nukleofila. Reakcija supstitucije sa tioureom je proučavana na tri različite temperature (288, 298 i 310 K). Negativna entropija aktivacije DS = potvrđuje asocijativni način aktivacije. Formiranje kompleksa [Ru(trpi)(bpi)H2O]2+ sa ligandima ...
    Kinetika, Ravnoteža, Ru(II), L-Histidin, Guanozin-5' -monofosfat, Dimetilsulfoksid, Tiourea
    ... for pharmaceutical use [6, 7]. In the following years, a large number of different Ru(II) and Ru(III) compounds were studied for their cytotoxic properties, such as polypyridyl complexes cis-[Ru(N,N-bpy)2Cl2] and mer-[Ru(N,N,N- trpy)Cl3] [12, 13], aminocarboxylato complexes [Ru(N,- N,O,O-pdta)Cl2] ...
    ... many different ruthenium complexes have been synthesized and investigated to elucidate the relationship between the structure of inert ligands and properties of the complexes. Complexes with polypyridyl ligands [9, 28–30] and organometallic half sandwich ligands [31–37] are studied frequently in order ...
    ... 50-GMP[ L-His[DMSO. It was expected that thiourea has the highest reactivity toward the Ru(II) complex studied, because it combines the ligand properties of thiolates (r-donor) and thioethers (r-donor, p-acceptor) [45, 46]. However, 50-GMP reacts slightly slower than thiourea. Taking into account ...

  • Towards Semantic Interoperability: Parallel Corpora as Linked Data Incorporating Named Entity Linking

    Ranka Stanković, Milica Ikonić Nešić, Olja Perisic, Mihailo Škorić, Olivera Kitanović (2024)
    U radu se prikazuju rezultati istraživanja vezanih za pripremu paralelnih korpusa, fokusirajući se na transformaciju u RDF grafove koristeći NLP Interchange Format (NIF) za lingvističku anotaciju. Pružamo pregled paralelnog korpusa koji je korišćen u ovom studijskom slučaju, kao i proces označavanja delova govora, lematizacije i prepoznavanja imenovanih entiteta (NER). Zatim opisujemo povezivanje imenovanih entiteta (NEL), konverziju podataka u RDF, i uključivanje NIF anotacija. Proizvedene NIF datoteke su evaluirane kroz istraživanje triplestore-a korišćenjem SPARQL upita. Na kraju, razmatra se povezivanje Linked ...
    paralelni korpusi, povezivanje imenovanih entiteta, prepoznavanje imenovanih entiteta, NER, NEL, povezani podaci, NIF, Vikipodaci

  • Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

    Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)
    Polimeri i plastika, opšta hemija
    ... 600 ◦C under a nitrogen atmosphere. Particular attention was devoted to temperature range between 400 and 500 ◦C, concerning the thermogravimetric properties of initial lignite and HDPE, shown in Figure 1a,b, as well as the fact that coal exists in a plastic state under such conditions [34]. The lignite/HDPE ...
    ... bituminous coal (24–35 MJ/kg) [61,62]. In comparison with solid residues obtained by HDPE pyrolysis, co-pyrolysis solid products have better combustion properties, as lignite has a stabilizing effect on the plastic residues morphology and prevents its melting [63]. Containing a relatively high amount of carbon ...
    ... explained by the presence of minor amount of oxygen in initial HDPE [42], most probably originating from additives that are intercalated to improve the properties of HDPE [80]. Further re- action of released CO2 with hydrocarbons at high temperatures (above 850 ◦C) resulted in the formation of CO, whose presence ...

  • A Lexical Approach to Acronyms and their Definitions

    Cvetana Krstev, Duško Vitas, Ranka Stanković (2015)
    In this paper we present a comprehensive approach to acronyms for Natural-Language Processing (NLP) of Serbian texts. The proposed procedure includes extraction of acronyms and their definitions that are usual Multi-Word Units (MWUs), shallow parsing of MWUs that enables MWU lemmatization and production of entries in morphological electronic dictionaries, both for MWU and acronyms, that are provided with grammatical, syntactic, semantic and domain information. This approach enables representation that reflects complex relations between acronyms and their definitions.
    ... inflectional properties of acronyms. Moreover, we intend to improve our extraction procedure in order to improve the recall and lemmatization procedure as to lem- matize successfully less frequent MWU structures. We plan to develop procedures for the detection of semantic properties of acronym-d ...

  • Knowledge and Rule-Based Diacritic Restoration in Serbian

    Cvetana Krstev, Ranka Stanković, Duško Vitas (2018)
    In this paper we present a procedure for the restoration of diacritics in Serbian texts written using the degraded Latin alphabet. The procedure relies on the comprehensive lexical resources for Serbian: the morphological electronic dictionaries, the Corpus of Contemporary Serbian and local grammars. Dictionaries are used to identify possible candidates for the restoration, while the dataobtainedfromSrpKorandlocalgrammarsassistsinmakingadecisionbetween several candidates in cases of ambiguity. The evaluation results reveal that,dependingonthetext,accuracyrangesfrom95.03%to99.36%,whilethe precision (average 98.93%) is always higher than the recall (average 94.94%).
    diacritic restoration, morphological dictionary, corpus, word n-grams, local grammars
    ... thesauri there are four basic types of relationships between concepts. The first type of the relations is the class-subclass relationship, it has the properties of transitivity and inheritance. The second type of the RuThes relations is the part-whole relation. An important condition for estab- lishing ...
    ... Dobrov, 2015). In RuThes, the part-whole relation is used not only to describe phys- ical parts, but also to other internal attributes, such as properties or roles for situations (Guarino et al., 2009). Figure 2: Relations and text entries for zero-day vulnerability concept from Sociopolitical thesaurus ...

  • Geoenvironmental Investigations at a Smelter Location in Bor (Serbia)

    Petar Papić, Zvonimir Milijić, Jana Stojković, Jovana Milosavljević, Maja Todorović, Marina Ćuk, Željko Kamberović (2014)

  • Using Query Expansion for Cross-Lingual Mathematical Terminology Extraction

    Velislava Stoykova, Ranka Stanković (2018)

  • Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software

    Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić (2024)
    The development of modern technologies has enabled the application of specialized softwares in the field of mining through various segments and processes, including in works related to drilling and blasting. The application of specialized software for drilling and blasting with the use of modern technologies such as photogrammetry enabled more accurate data from the field for later processing. By processing data and creating a 3D model of the terrain for drilling and blasting works, it can obtain precise data, ...
    optimizacija, 3D model, bušenje, miniranje, O-Pitblast, softver

  • Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils

    Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)
    MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteurii
    ... Additionally, Raman analysis was performed at a range of 100–1500 cm–1 using a DXR Raman microscope (Thermo Scientific, Waltham, MA, USA). The thermal properties were investigated using differential thermal and thermogravimetric analysis (DTA/TGA) which was performed in the tem- perature range up to 1000 ◦C ...
    ... ureolysis by Sporosarcina pasteurii. J. Appl. Microb. 2015, 118, 1321–1332. [CrossRef] 11. Krajewska, B.; Ureases, I. Functional, catalytic and kinetic properties: A review. J. Mol. Catal. B Enzym. 2009, 59, 9–21. [CrossRef] 12. Whiffin, V.S.; van Paassen, L.A.; Harkes, M.P. Microbial carbonate precipitation ...
    ... [CrossRef] [PubMed] 33. Vahabi, A.; Ramezanianpour, A.A.; Akbari Noghabi, K. A preliminary insight into the revolutionary new line in improving concrete properties using an indigenous bacterial strain Bacillus licheniformis AK01, as a healing agent. Eur. J. Environ. Civil. Eng. 2014, 19, 614–627. [CrossRef] ...

  • Design of a sucker rod pumping system

    Ana Ponoćko (2024)
    For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...
    sucker rod pump, fluid production, mechanical extraction methods,, Prosper, QROD, RODSTAR
    ... forces act on the downhole components: 1. Buoyant Force (Archimedean Force) This force acts on the rod strings and reduces their weight. 2. Static Force: Due to the weight of the rod strings, tubing, and the weight of the fluid. 3. Elastic Force: Due to the elasticity of the rod strings and ...
    ... input screen at any time. RodStar allows users to design rod pumping systems by inputting parameters such as well depth, fluid properties, and mechanical properties of rods and pumps. The software simulates the behavior of the pumping system under various operational conditions, enabling engineers ...
    ... carbon– manganese and nickel-molybdenum groups. The latter alloy group may include additional elements to enhance strength, improve structural properties, and achieve specific technical characteristics. These elements include nickel, chromium, copper, molybdenum, and boron. Steel rods are classified ...

  • Sinteza i karakterizacija vanadata alkalnih metala sa elementima retkih zemalja

    Anđela Jovanović (2024)
    Predmet i cilj pisanja ovog rada su sinteza i karakterizacija vanadata alkalnih metala sa elementima retkih zemalja. Prilikom ovih istraživanja, ispitivan je sistem REE2O3–V2O5–KF, gde REE predstavlja trovalentni katjon izabranih elemenata retkih zemalja (Y, Sm, Eu, Gd, Er, Yb). Ovo istraživanje bazirano je na sintezi kristala, nakon čega su dobijeni kristali posmatrani pod binokularnom lupom, analizirani metodom rendgenske difrakcije na polikristalnom materijalu (XRPD) i metodom skenirajuće elektronske mikroskopije sa energetsko-disperzivnom spektroskopijom (SEM-EDS), kako bi se utvrdile karakteristike dobijenih kristala. ...
    elementi retkih zemalja, sinteza kristala metodom fluksa, vanadati alkalnih metala, rendgenska difrakcija, SEM-EDS metoda

  • Insights into dike nucleation and eruption dynamics from high-resolution seismic imaging of magmatic system at the East Pacific Rise

    Milena Marjanović, Suzanne M. Carbotte, Alexandre Stopin, Satish C. Singh, René-Édouard Plessix, Miloš Marjanović, Mladen R. Nedimović, Juan Pablo Canales, Hélène D. Carton, John C. Mutter, Javier Escartín (2023)
    Multidisciplinary