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Упит dcterms_subject_txt:field data analysis

1267 items

  • 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

  • Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery

    Maja Milošević, Biljana Đorđević, Mihovil Logar (2020)
    калцит, сирова глина, традиционална керамика, Злакуса
    ... (International Centre for Diffraction Data). The chemical com- position was determined by X-ray fluorescence (XRF) spectros- copy using a PANalytical MiniPal 4 XREF spectrometer equipped with a high-resolution silicon drift detector (SDD). Differential thermal analysis (DTA) was performed on a modernized ...
    ... 132–141. Smykatz-Kloss W. (1982) Application of differential thermal analysis in min- eralogy. Journal of Thermal Analysis, 23, 15–44. Speil S., Berkelhamer L.H., Pask J. & Davies B. (1945) Differential Thermal Analysis of Clays and Aluminous Minerals. US Bureau of Mines, Paper #664. Washington ...
    ... 09:43:56 Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery Maja Milošević, Biljana Đorđević, Mihovil Logar Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Mineralogical analysis of a clay body from Zlakusa ...

  • An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System

    Božo Kolonja, Ranka Stanković, Filip Vuković, Ivan Obradović (2006)
    In this paper we describe the approach that has been used in the development of the Management Information System (MIS) in the Coal Mine Pljevlja in Montenegro. The methodology of this approach was based on new information technologies and management techniques which have already been successfully applied in other related fields. Its main goal was to introduce modern management techniques to mining, adapted to specific features of the mining industry, its operations and environment, thus enabling the tactical management ...
    ... SQL Server Reporting Services and others. It is a system for direct analytical data processing implemented through Microsoft® SQL Server™ 2000 Analysis Services which supports multidimensional views of business data. The methodology has already been applied in the development of the first phase ...
    ... SQL Server Reporting Services, etc. Hence, it is a system for direct analytical data processing implemented through Microsoft® SQL Server™ 2000 Analysis Services, which supports multidimensional views on business data, using the technology of multidimensional or relational databases. Managers and ...
    ... Symposium on Mine Planning & Equipment Selection 2000. Athens, Greece. Seidman, C. (2001). Data Mining with Microsoft SQL Server 2000. Redmond: Microsoft Press. Jacobson, R. (2001). Microsoft SQL Server 2000 Analysis Services. Redmond: Microsoft Press. ...

  • A WebGIS Decision Support System for Management of Abandoned Mines

    Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2016)
    ... multimedia data panel for the same mine.      Figure 5. The panels showing basic information and multimedia data fora mine. 2.3. Reporting and Data Analysis Within the reporting system the following reports are available: ‚ Reports giving data on individual abandoned mines (general data, properties ...
    ... n number, etc. Domain control for specific data is based on a common vocabulary, integrated in the database and application. All data related to one company, like permits, field visit records, multimedia, described and contoured area, remote sensing data, can be retrieved and displayed, both on the ...
    ... waste landfills within the mining waste field, as well as other data related to the management of mining waste. In the cadastre of abandoned mines and mining facilities data on the position and status of these mines and mine facilities are entered, as well as data on implemented measures for remediation ...

  • Metodologija proračuna sanacije klizišta šipovima

    Slobodan Ćorić, Dragoslav Rakić, Stanko Ćorić, Dušan Berisavljević (2022)
    Klizišta u Srbiji, u najvećem broju slučajeva, jako zavise od geoloških uslova u terenu i svako klizište ima svoje specifičnosti koje moraju da se odrede geotehničkim istraživanjima. Stoga su u radu prvo prikazane osnovne karakteristike klizišta u Srbiji, kao i postupci njihovog istraživanja. Zatim su prikazani proračuni sanacije klizišta vertikalnim šipovima. Metodologija proračuna je složena, jer podrazumeva interakciju klizišta i stabilizirajućih šipova. Prilikom određivanja bočne otpornosti tla oko šipova koristi se metoda Brinč Hansena koja uzima u obzir trodimenzionalne ...
    klizišta, geotehnička istraživanja, bočna nosivost šipova, interakcija klizišta i šipa, analiza stabilnosti

  • Fuzzy Model for Risk Assessment of Machinery Failures

    Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković (2020)
    The main goal of this research was the development of an algorithm for the implementation of negative risk parameters in a synthesis model for a risk level assessment for a specific machine used in the mining industry. Fuzzy sets and fuzzy logic theory, in combination with statistical methods, were applied to analyze the time picture state of the observed machine. Fuzzy logic is presented through fuzzy proposition and a fuzzy composition module. Using these tools, the symmetric position of the ...
    fazi teorija, rizik, otkaz rudarskih mašina
    ... failures. These characteristic failures were based on data on the types of failures that occur within the subsystems and elements. 4.2. Data Collection Data related to the type of failure and the time between failures were obtained from a thorough analysis of the documentation acquired from the quarry, ...
    ... available data on the mechanical condition of a machine which are time-based (time between failures, time to repair, pollution level, injuries, setback costs, spare parts and replacement costs, delivery to customer delay costs etc.) they have to be acquired in the field. In addition, if data are not ...
    ... resources and mineral processing). The condition of the machines is examined through an analysis of existing data on the operation of the machine, including failures that have occurred during the observed period of time. Data on recorded accidents, causes, and the consequences due to a failure are the starting ...

  • Regionalna karakterizacija karstnih podzemnih voda dela centralnog Balkana u funkciji njihovog održivog korišćenja i menadžmenta

    Veljko J. Marinović (2022)
    Karstne podzemne vode koristi oko 700 miliona ljudi na svetu, čime je njihov značaj za svetsko stanovništvo nemerljiv. U sklopu doktorske disertacije vršena su istraživanja i analize karstnih sistema dela centralnog Balkana (Srbije, Crne Gore i Savskog sliva Bosne i Hercegovine), kako bi se evaluirao ovaj dragoceni resurs. Analize su vršene na primerima karstnih sistema vrela Perućac, Seljašnica, Mokra i Mlava (Srbija), Oko Bijele i Rijeka Crnojevića (Crna Gora) i vrelo Bosne (Bosna i Hercegovina), kao i na regionalnom ...
    karstni sistem, podzemna voda, pritisci na kvantitet i kvalitet, menadžment podzemnih vodnih resursa

  • Approach to operational mine planning: Case study Tamnava West

    Dejan Stevanović, Mirjana Banković, Milica Pešić Georgiadis, Ranka Stanković (2014)
    ... individual ply analysis and composite assays (5109 records, average sample length is 0.8m), • Checking drill hole collar coordinates to eliminate any obvious errors in location Only portion of mine is used in this study since it has sufficient number of geological exploration data, necessary ...
    ... from BpUBS (Integral data base of Serbian Coal Basins). This database stores all exploration drilling data from Kolubara Coal Basin, such as: basic information about drill hole (collar data), complete lithology and assaying data, geotechnical, hydrogeological, geophysical data. This system can ...
    ... Preparation of data - Geological modeling - Ultimate pit design - Design of pit benches - Discretization of benches on mining blocks and cuts - Reporting 2.1.1. Preparation of data For the purpose of importing in Minex, the data went through many transformations. Borehole data where obtained ...

  • A Model for Determining Fuzzy Evaluations of Partial Indicators of Availability for High-Capacity Continuous Systems at Coal Open Pits Using a Neuro-Fuzzy Inference System

    Miljan Gomilanović, Miloš Tanasijević, Saša Stepanović, Filip Miletić (2023)
    This paper presents a model for determining fuzzy evaluations of partial indicators of the availability of continuous systems at coal open pits using a neuro-fuzzy inference system. The system itself is a combination of fuzzy logic and artificial neural networks. The system availability is divided into partial indicators. By combining the fuzzy logic and artificial neural networks, a model is obtained that has the ability to learn and uses expert judgment for that learning. This paper deals with the ...
    системи, континуални системи експлоатације (роторни багер-транспортер-дробилично постројење), рударство, расположивост, меко рачунарство, фази логика, ANN, ANFIS

  • Analiza sistema odvodnjavanja površinskog kopa Drmno od podzemnih voda sa severnim savršenim ekranom

    Tomislav Šubaranović, Dušan Polomčić, Vladimir Pavlović (2019)
    Izrada nesavršenog ekrana do drugog sloja uglja na površinskom kopu Drmno, pored zadržavanja postojećih standardnih metoda odvodnjavanja od podzemnih voda linijama bunara, predviđena je poslednje decenije u celokupnoj rudarskoj projektnoj dokumentaciji. Iz objektivnih i subjektivnih razloga njegova realizacija nije ostvarena do danas. U međuvremenu je, uz dodatna geološka istraživanja i promenu dinamike i parametara sistema površinske eksploatacije, došlo do određenih značajnih prostornih promena geoloških i rudarskih uslova u eksploatacionom polju. Ovo je omogućilo preliminarno inoviranje pristupa procesu i konceptu ...
    podzemne vode, odvodnjavanje, bunari, ekran, dinamika, troškovi

  • The different approaches in seismic stratigraphy interpretation

    Dejan Radivojević (2018)
    U tekstu su prikazana dva osnovna pristupa u seizmostratigrafskoj interpretaciji. Prvi kao polaznu osnovu ima seizmičke sekcije, čija se interpretacija u kasnijoj fazi koreliše sa bušotinskim podacima. Drugi u prvoj fazi analizira podatke dobijene dubokim bušenjem koji se kasnije korelišu sa seizmičkim sekcijama. Prikazan je hronološki redosled i objašnjen postupak pri seizmostratigrafskoj interpretaciji oba pristupa. Ovakav način interpretacije omogućio je naftnim kompanijama detaljnije i preciznije sagledavanje geoloških odnosa, smanjenje rizika istraživanja i racionalnije projektovanje razradnih bušotina.
    seizmostratigrafija, istraživanje nafte i gasa, karakteristične seizmičke sekvence, seiz-mofacijalna analiza
    ... pretpostavke seizmostratigrafskog pristupa su (geološka) da slojne površine odgovaraju vreme- nskim površinama i (geofizička) da interpretacija faze (refleksije) predstavlja slojnu površinu. Iz ove dve pretpostavke može se izvesti zaključak da seizmičke refleksije predstavljaju vremenske površine ...
    ... narandžastom bojom (slika 2). Tre- ba naglasiti da granica karakteristične seizmičke sek- vence ne mora uvek da bude predstavljena pozitivnom (pik) ili negativnom (trof) amplitudom na seizmičkoj sekciji. Interpretacija akustične osnove bi trebala da pre- thodi interpretaciji karakterističnih seizmičkih ...
    ... ovog pristupa predstavlja odabir repre- zentativne bušotine. Reprezentativna bušotina bi treba- lo da ima kvalitetno urađena karotažna merenja, da se nalazi na ili u blizini seizmičkog profila i da je nabušila sve (ili većinu) stratigrafskih jedinica koje su razvijene na ispitivanom prostoru. ...

  • 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

  • A Data Driven Approach for Raw Material Terminology

    Olivera Kitanović, Ranka Stanković, Aleksandra Tomašević, Mihailo Škorić, Ivan Babić, Ljiljana Kolonja (2021)
    The research presented in this paper aims at creating a bilingual (sr-en), easily searchable, hypertext, born-digital, corpus-based terminological database of raw material terminology for dictionary production. The approach is based on linking dictionaries related to the raw material domain, both digitally born and printed, into a lexicon structure, aligning terminology from different dictionaries as much as possible. This paper presents the main features of this approach, data used for compilation of the terminological database, the procedure by which it has ...
    sirovine, rudarstvo, terminologija, rečnik, terminološka aplikacija, mobilna aplikacija, digitizacija, leksički podaci, korpusi, otvoreni povezani podaci
    ... ic methods for automatic knowledge extraction are used, including corpus data analysis, automatic data extraction, editing and publishing extracted data in (online) dictionaries. Using extracted lexicographically relevant data (lemma lists, example sentences, collocations) as complementary resources ...
    ... previous research in the field of NLP and terminology, but represents the first comprehensive solution for both building and using a terminology system that includes data, application and user interface layers covering different data and software technologies. The automation of data publishing in the form ...
    ... pedagogical perspective [6]. Big data analysis methods have opened new possibilities for analyzing corpora, which contain large amounts of textual data. Thus, for example, Chen et al. [7] propose a novel statistic-based corpus machine processing approach to refine big textual data, to be used for ESP (English ...

  • Termička zrelost organske supstance i naftno-matični potencijal istočne Hercegovine

    Nikoleta Aleksić (2021)
    Cilj istraživanja, obrade i interpretacije rezultata prikazanih u disertaciji je utvrđivanje termičke zrelosti organske supstance i naftno-matičnog potencijala sedimentnih stena na području istočne Hercegovine, primenom metoda pirolize Rock-Eval, organo-petrografskog proučavanja organske supstance u normalnoj svetlosti i fluorescenciji, koja je pored kvalitativne analize uključila posebno i refleksiju vitrinita. Osim toga, na osnovu organsko-geohemijskih analiza sagledane su karakteristike i poreklo ekstrahovanog bitumena metodom gasne hromatografije - masene spektrometrije, pri čemu su izvršene analize biomarkera kao geohemijskih indikatora. Tokom rada na doktorskoj ...
    organska supstanca, termička zrelost, matične stene, naftni potencijal, refleksija vitrinita, piroliza Rock-Eval, biomarkeri, Karbonatna platforma, istočna Hercegovina

  • 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

  • Concepts for Improving Machine Learning Based Landslide Assessment

    Miloš Marjanović, Mileva Samardžić Petrović, Biljana Abolmasov, Uroš Đurić (2019)
    Katastar klizišta, Podložnost, Hazard, Mašinsko učenje, Uzorkovanje, Validacija

  • 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

  • The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers

    Dragan Ignjatović, Predrag Jovančić, Stevan Đenadić, Ivan Janković, Ivica Ristović (2019)
    One of the most important prerequisites for the successful operation of the open-cast lignite mine is to carry out all the auxiliary works timely with the necessary quality. The most important and most commonly used auxiliary machines are bulldozers. Engaging time of bulldozers use is in direct relation with the coefficients of the time and capacity utilization of the continuous system for the excavation of coal and tailings, which indicates their importance. More than 100 bulldozers have been hired ...
    open-cast coal mine, auxiliary works, bulldozers, optimization, availability
    ... costs of fuel and lubricants, transportation cost from manufacturer, interest rates, etc. Analysis was performed according to recommended method for evaluation of hourly ownership and operational costs, including data on auxiliary machines (Caterpillar and Komatsu methods). Integration of this information ...
    ... 50% of all auxiliary equipment costs. This implies the necessity for detailed analysis ог all parameters of these machines, including. current and historic trends, as well as some technical capabilities. Such ап analysis would enable better forecasting ог their operation. Dozer's life оп the open-cast ...
    ... quality, ореганпр conditions, maintenance quality, operating quality, апа others. Empirical data shows that dozer's life on open-cast mines is 25-30,000 hours, i.e. around 10 years of operation. However, some data also shows that dozers after 6% year ог operation аге having lesser efficiency which is ...

  • Smanjenje sleganja plitkih temelja primenom mikrošipova

    Slobodan Ćorić, Dragoslav Rakić (2021)
    Mikrošipovi su šipovi malog prečnika koji se grade tako što se u tlu specijalni postupkom formira bušotina koja se zatim armira i injektira. Njihov prečnik je najčešće 150 – 300 mm, a dužina može da bude i više desetina metara. Mikrošipovi mogu da se grade u svim vrstama tla i mogu da budu vertikalni i kosi. Oni se, stoga, koriste kao zamena za konvencionalne šipove i ankere. Primena mikrošipova u fundiranju predstavlja jedan savremeni način izgradnje i sanacije temelja/objekata. ...
    mikrošipovi, sleganje plitkih temelja i mikrošipova, krutost tla i mikrošipova

  • Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia

    Fen Huang, Ljiljana Vasic, Xia Wu, Jianhua Cao, Saša Milanovic (2019)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change