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Упит dcterms_subject_txt:top-down method

508 items

  • 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

  • Hydraulic impact of pressure transients from water conveyance tunnel on the complex hydrogeological system: A case study HPP

    Igor Jemcov, Maja Todorović, Aleksandar Jemcov, Marina Ćuk Đurović (2024)
    Tunel pod pritiskom, Unutrašnji pijezometri, Tranzijenti pritiska, Karstna izdan, Pukotinska izdan, Hidraulički odziv
    ... distinct responses to pressure transients. • Tunnel pressure transient analysis as a tool for hydrogeological characterization. • Anefficient method for monitoring the environmental impact of HPP operations. Abstract Hydraulic tunnels, integral components of hydropower plant (HPP) systems ...

  • Палеомагнетски резултати из Тимочког магматског комплекса, Источна Србија

    Весна Лесић, Емо Мартон, Драган Лукић, Весна Цветков (2018)
    ... ured. This was  followed by stepwise demagnetization of sister speci‐ mens of selected samples, one with alternating field, the other with thermal method (accompanied by  the monitoring of the magnetic susceptibility) till the magnetic signal was lost. The demagnetization me‐ thod which gave better  ...

  • English for Geology Students. 1

    Lidija Beko (2023)
    Engleski jezik
    ... which we share our planet – every aspect of the Earth. Earth scientists, like their colleaguesin other fields, have developed a scientific method based on observation and collection of data, formu- lation and testing of hypothe- ses,leadingto the formulation oflaws or principles. This ...

  • Novi model za postizanje optimalne proizvodnje na naftnom polju Amal

    Elnori Elmabrouk Ali Elhaddad (2015-04-16)
    Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...
    nafta, proizvodnja, optimizacija, Amal, Libija
    ... inhibitors has been performed, and the application of thermal method of tubing heating has been proposed. As a solution for the penetration of layer sand into the production system, it has proposed the use of gravel pack method. To achieve more efficient oil production, it has defined ...
    ... Refinery,Downstream Today. 94 Roberts, J.M. (1970). Geology of Giant Petroleum Fields: Amal Field, AAPG. Roopa I., Dawe R.A., Samuel T., 2005. Down hole heating: Productivity ratio improvements—dangers of misconceptions, Petrol. Sci. Technol. 23, 681- 692. Rusk, D. C., (2001), Libya: Petroleum ...
    ... http://www.slb.com/. Prstojević B., (2012) Priprema nafte i gasa, drugo izdanje, Rudarsko geloški fakultet, Beograd, 243. Rachovich D. (2012) World's Top 23 Proven Oil Reserves Holders, Oil & Gas Journal, jan 2012. Rahmati H., Jafarpour M., Azadbakht S., Nouri A., Vaziri H., Chan D., Xiao Y., (2013) ...

  • Novi model za postizanje optimalne proizvodnje na naftnom polju Amal

    Elnori Elmabrouk Ali Elhaddad (2015-04-16)
    Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...
    nafta, proizvodnja, optimizacija, Amal, Libija
    ... inhibitors has been performed, and the application of thermal method of tubing heating has been proposed. As a solution for the penetration of layer sand into the production system, it has proposed the use of gravel pack method. To achieve more efficient oil production, it has defined ...
    ... Refinery,Downstream Today. 94 Roberts, J.M. (1970). Geology of Giant Petroleum Fields: Amal Field, AAPG. Roopa I., Dawe R.A., Samuel T., 2005. Down hole heating: Productivity ratio improvements—dangers of misconceptions, Petrol. Sci. Technol. 23, 681- 692. Rusk, D. C., (2001), Libya: Petroleum ...
    ... http://www.slb.com/. Prstojević B., (2012) Priprema nafte i gasa, drugo izdanje, Rudarsko geloški fakultet, Beograd, 243. Rachovich D. (2012) World's Top 23 Proven Oil Reserves Holders, Oil & Gas Journal, jan 2012. Rahmati H., Jafarpour M., Azadbakht S., Nouri A., Vaziri H., Chan D., Xiao Y., (2013) ...

  • Речник САНУ као база терминолошких речника (на примеру речника кулинарства)

    Рада Стијовић, Олга Сабо, Ранка Станковић (2017)
    ... 19(1), pp.61 –74. 13 5. 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), pp. 115-130. 6. Ranka Stanković, Cvetana Krstev, Ivan Obradović, Biljana Lazić and Aleksandra ...
    ... Dictionary of Serbo-Croatian Literary and folk Language SASA, that is built as a thesaurus. To obtain the relevant data, it was necessary to find a method of extracting this lexicon, given that it (unlike most other areas of terminology) is not systematically labelled with appropriate qualifiers. ...

  • Indexing of textual databases based on lexical resources: A case study for Serbian

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović (2015)
    In this paper we describe an approach to improvement of information retrieval results for large textual databases by pre-indexing documents using bag-of-words and Named Entity Recognition. The approach was applied on a database of geological projects financed by the Republic of Serbia in the last half century. Each document within this database is described by metadata, consisting of several fields such as title, domain, keywords, abstract, geographical location and the like. A bag of words was produced from these ...
    ... document, with as many as 47 NEs for one of them. For indexing we used only three top level types: personal names, locations and organizations and their distribution is presented in Table 1. Table 1. Distribution of three top-level NEs: persons, locations and organizations NE type Frequency Average per ...
    ... but also marginal ones, like “e-mail addresses” and “book titles”. The NE hierarchy in our Named Entity Recognition (NER) system consists of five top-level types: persons, organizations, locations, amounts, and temporal expressions, each of them having one or more levels of sub-types. Our tagging strategy ...
    ... specific feature of Serbian is the common use of two alphabets: Cyrillic and Latin, so a user can initiate her/his search using any of the two, and the method on the server automatically expands the search query with the other, while the results are shown in the original script, and that is Cyrillic. Query ...

  • Geochemical study of U, Th and REE mineralizations in Jurassic sediments and hydrochemical characterization of groundwaters in Eastern Serbia – Case study: Plavna area

    Jovan Kovačević, Maja Todorović, Marina Ćuk, Petar Papić (2016)
    jurski sedimenti, uran, torijum, elementi retkih zemalja, podzemna voda, istočna Srbija

  • Managing mining project documentation using human language technology

    Aleksandra Tomašević, Ranka Stanković, Miloš Utvić, Ivan Obradović, Božo Kolonja (2018)
    Purpose: This paper aims to develop a system, which would enable efficient management and exploitation of documentation in electronic form, related to mining projects, with information retrieval and information extraction (IE) features, using various language resources and natural language processing. Design/methodology/approach: The system is designed to integrate textual, lexical, semantic and terminological resources, enabling advanced document search and extraction of information. These resources are integrated with a set of Web services and applications, for different user profiles and use-cases. Findings: The ...
    Digital libraries, Information retrieval, Data mining, Human language technologies, Project documentation

  • A Multilingual Evaluation Dataset for Monolingual Word Sense Alignment

    Sina Ahmadi, John P McCrae, Sanni Nimb, Fahad Khan, Monica Monachini, Bolette S Pedersen, Thierry Declerck, Tanja Wissik, Andrea Bellandi, Irene Pisani, [...] Ranka Stanković and others (2020)
    Aligning senses across resources and languages is a challenging task with beneficial applications in the field of natural language processing and electronic lexicography. In this paper, we describe our efforts in manually aligning monolingual dictionaries. The alignment is carried out at sense-level for various resources in 15 languages. Moreover, senses are annotated with possible semantic relationships such as broadness, narrowness, relatedness, and equivalence. In comparison to previous datasets for this task, this dataset covers a wide range of languages ...
    lexical semantic resources, sense alignment, lexicography, language resource
    ... • The sense text (definition) in the first resource; • An interactive drop-down to specify one of the 5 se- mantic relations (see below) from the sense in the first resource; • The sense text (abbreviated) in a drop-down list from the second resource, which the first resource is matched to; • ...
    ... . Niemann and Gurevych (2011) propose a threshold-based Personalized PageRank method for extracting a set of Wikipedia articles as alignment candidates and automatically aligning them with WordNet synsets. This method yields a sense inventory of higher coverage in comparison to taxonomy mapping ...
    ... clog.v.05 coalesce or unite in a mass Figure 1: Sense provided for clog (verb) in the English WordNet (R1) and the Webster Dictionary (R2). Drop-down lists are created dynamically for semantic relationship annotation. scribed our methodology in Section 3, we further elaborate on the challenges ...

  • Determination of Mechanical Properties of Altered Dacite by Laboratory Methods

    Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola Živanović (2021)
    This paper presents a methodology for determining the uniaxial and triaxial compressive strength of heterogeneous material composed of dacite (D) and altered dacite (AD). A zone of gradual transition from altered dacite to dacite was observed in the rock mass. The mechanical properties of the rock material in that zone were determined by laboratory tests of composite samples that consisted of rock material discs. However, the functional dependence on the strength parameter alteration of the rock material (UCS, intact ...
    Geology, Geotechnical Engineering, Engineering Geology
    ... Comparison of the value material constant mi. Marinos [10] expanded and modified the original practical method for determining the intact strength properties of a heterogeneous rock mass. In this method, too, the strength properties of a heterogeneous rock mass σci and mi are determined as the weighted ...
    ... constant. Minerals 2021, 11, 813 16 of 19 Figure 16. Comparison of the intact rock material UCS σci TX. Marinos and Hoek [9] proposed a practical method for determining the intact strength properties of a heterogeneous rock mass. The authors suggested that it is not appropriate to use properties of ...

  • The effect of finite driving rate on avalanche distributions

    Sonja Radić, Sanja Janićević, Dragutin Jovković, Đorđe Spasojević (2021)
    Statistics, Probability and Uncertainty,Statistics and Probability,Statistical and Nonlinear Physics

  • Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone

    Emő Márton, Marinko Toljić, Vesna Cvetkov (2022)
    The Vardar Zone is a product of the Triassic-Jurassic opening of the Neotethys, Jurassic obduction, Late Cretaceous/Paleogene consumption of the oceanic crust and continental collision. During the last process, the Eastern Vardar Zone was thrust over the Central and eventually both onto the Western Vardar Zone. The present paleomagnetic and structural study provided new results from the first two zones in the Belgrade area. The younger set of data, together with published ones from the third zone, provide firm ...
    Adria–Europe suture, Vardar Zone, Paleomagnetism, Thrusting, Vertical axis rotation

  • Uniaxial compressive strength test before and after standard fire test on rock mass

    Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović (2022)
    ... Metallurgy, London. Wittke, W., 2014, Rock Mechanics Based on an Anisotropic Jointed Rock Model (AJRM) SRPS EN 1926:2007, Natural stone test method - Determination of compressive strength SRPS EN 1363-1:2014, Fire resistance tests - Part 1: General requirements 437 ...

  • Distribution of major and trace elements in the Kovin lignite (Serbia)

    Dragana Životić, Olga Cvetković, Predrag Vulić, Ivan Gržetić, Vladimir Simić, Konstantin Ilijević, Biljana Dojčinović, Suzana Erić, Bogdan Radić, Sanja Stojadinović, Snežana Trifunović (2019)
    geochemical and mineralogical study was performed on lignite samples from the Upper Miocene Kovin deposit, hosting three coal seams. The Kovin lignite is characterized by high moisture content, medium to high ash yield, medium to high sulphur content and a relatively low gross and net calorific value. The mineralogical composition, and major and trace element contents were determined by X-ray diffraction, scanning electron microscopy with energy dispersive Xray spectroscopy (SEM-EDS) analyses, and inductively coupled plasma optical emission spectrometry (ICP-OES). ...
    General Earth and Planetary Sciences, General Environmental Science
    ... value by the calorimetric bomb method, and calculation of net calo­ rific value.– Institute for Standardization of Serbia, Belgrade, Serbia, 11 p. (in Ser­ bian). SRPS B.H8.338:1986, (1986): Coal and coke ­ Determination of total moisture content ­ Gravimetric method.– Institute for Standardization ...
    ... 2016). Also, its occurrence is possible in metalloporphyrins and other metal­organic com­ pounds (SAXBY, 2000) especially in low­rank coals. The top of coal seam III (sample 11/79) consists of mixtures of matrix and mineral rich coals with the dominance of detro­ huminite. The high ash content as ...
    ... International Organization for Standardization, Geneva, Switzerland (12 p). ISO 7404­3 (2009): Methods for the petrographic analysis of coals – Part 3: Method of determining maceral group composition.– Organization for Standardization, Swit­ zerland (7 p). KALAITZIDIS, S., CHRISTANIS, K., GEORGAKOPOULOS ...

  • Mechanosynthesis and structural characterization of nanocrystalline Ce1–Y O2– (x=0.1–0.35) solid solutions

    Martin Fabián, Bratislav Antić, Vladimír Girman, Milica Vučinić-Vasić, Aleksandar Kremenović, Shigeru Suzuki, Horst Hahn, Vladimír Šepelák (2015)
    A series of nanostructuredfluorite-type Ce1–xYxO2–δ (0rxr0.35) solid solutions, prepared via highenergy milling of the CeO2/Y2O3mixtures, are investigated by XRD, HR-TEM, EDS and Raman spectroscopy. For thefirst time, complementary information on both the long-range and short-range structural features of mechanosynthesized Ce1–xYxO2–δ, obtained by Rietveld analysis of XRD data and Raman spectroscopy, is provided. The lattice parameters of the as-prepared solid solutions decrease with increasing yttrium content. Rietveld refinements of the XRD data reveal increase in microstrains in the host ceria ...
    Ceria, Yttrium, Solid solution, Mechanosynthesis, Oxygen vacancy, Nanocrystalline material

  • Definition of groundwater genesis and circulation conditions of the complex hydrogeological karst system Mlava–Belosavac–Belosavac-2 (eastern Serbia)

    Ljiljana Vasić, Saša Milanović, Zoran Stevanović, Laszlo Palcsu (2020)
    Geochemistry and Petrology

  • Geochemical evaluation of dolostone deposits in Montenegro: Implications for potential industrial applications

    Darko Bozovic, Vladimir Simic, Dragan Radulovic, Slobodan Radusinovic, Vesna Matovic, Anja Terzic (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 ...
    примарне сировине, минералогија, физичко-механичка својства, технолошка својства, наука о материјалима

  • Hydrothermal Synthesized and Alkaline Activated Carbons Prepared from Glucose and Fructose—Detailed Characterization and Testing in Heavy Metals and Methylene Blue Removal

    Sanja Krstić, Milan Kragović, Maja Pagnacco, Vladimir Dodevski, Branka Kaluđerović, Miloš Momčilović, Ivica Ristović, Marija Stojmenović (2018)
    glukoza, fruktoza, аktivni ugalj, hidrotermalni tretman, aktivacija hidroksida, teški metali, metilen plavo
    ... p/po < 0.01 (p and po represent the equilibrium and saturation pressures of nitrogen at a fixed temperature). Using BJH (Barrett, Joyner and Halenda) method [41], for every sample from desorption branch of the nitrogen isotherm pore-size distributions were calculated. In addition, mesopore surface (Smeso) ...
    ... (Smeso) and micropore volume (Vmicro) were also calculated from the isotherms. By using the Minerals 2018, 8, 246 5 of 21 high-resolution αs–plot method [42–45], mesopore surface area (Smeso) and micropore volume (Vmicro) were determined. Micropore surface (Smicro) was calculated by subtracting Smeso ...
    ... 2010, 181, 686–691. [CrossRef] [PubMed] 4. Milentijević, G.; Nedeljković, B.; Lekić, M.; Nikić, Z.; Ristović, I.; Djokić, J. Application of a Method for intelligent multi-criteria analysis of the environmental impact of tailing ponds in northern Kosovo and Metohija. Energies 2016, 9, 935. [CrossRef] ...