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Упит dcterms_subject_txt:2D geološko-geofizički model

3734 items

  • Развој геолошког терминолошког речника ГеолИССТерм

    Ranka Stanković, Branislav Trivić, Olivera Kitanović, Branislav Blagojević, Velizar Nikolić (2011)
    ... Beograd. Petković, kosta. 1975. Geološka terminologija i nomenklatura, I-VII. Beograd: rudarsko-geološki fakultet. Projekat “Razvoj geološke terminologije i nomen- klature za geološku bazu podataka Srbije”, broj 310- 02-113/2009-02 od 04. 08. 2009. godine rudarsko- geološki fakultet, rukovodilac Banjac ...
    ... Trivić Branislav, Stanković, ranka i Banjac, Nenad. 2008. kratak pregled imple- mentacije geološkog informacionog sistema Srbije. Zapisnici Srpskog geološkog društva za 2007.godinu. Beograd, Srpsko geološko društvo, pp.37-42. Daconta, michael. Obrst, leo & Smith, kevin 2003. The Semantic Web: A ...
    ... to be able to meet all previously derived requirements and be func- tional within geolISS, the Uml model with a special structure was developed (Figure 2). The class Rečnik (Vocabulary) in the model is a lexi- cographic superclass whose instances are inher- ited. GeološkiRečnik (GeologicVocabulary) ...

  • Design of the Opencast Coal Mine Drmno Dewatering System

    Vladimir Pavlović, Dušan Polomčić, Tomislav Šubaranović (2014)
    Development of mining in the opencast mine Drmno from Kostolac basin in Serbia is carried out in the increasingly complex geological and hydro geological conditions with the decline of the coal seams to the alluvial part of Europe's largest river Danube. Greater depth and inflow of groundwater significantly increase costs for dewatering facilities construction with the requirement for optimizing of this more and more important surface mining process. Making decision on screen construction in the opencast mine with redesign ...
    dewatering system, groundwater, hydrodynamic model, dewatering wells, screen, reliability, environmental effects.

  • Numerical modelling of a single intra-oceanic subduction for the origin of the Balkan ophiolites

    Nikola Stanković, Vesna Cvetkov, Vladica Cvetković (2024)

  • Turbidity simulation for short-term prediction: case study of the karst spring Surdup (Bor, Serbia)

    Marina Pešić, Vesna Ristić Vakanjac, Boris Vakanjac, Kostadin Jovanov (2016)
    Из перспективе снабдевања пијаћом водом, квалитет воде карстних издани је међу највишим, и често захтева само њихову дезинфекцију пре употребе. Међутим, карстне подземне воде изложене су одређеним притисцима. Током сушних периода углавном има мало воде, а током кишних периода има изненадних променa и квалитета и количине воде. Реакција слива на падавине је често брза и варијације у параметрима квалитета и квантитета (истицање, ниво вода, замућеност, укупан број микроорганизама, суспендовани нанос, итд.) су нестабилни. Ово захтева праћење истицања и ...
    водоснабдевање, карстно врело, истицање, мутноћа, симулациони модели

  • Stochastic Prediction of Temporal Variations of Karst Groundwater Regime in Function of Sustainable Management: Case Study Mokra Karst Spring (SE Serbia)

    Veljko Marinović, Branislav Petrović (2021)
    karst groundwater, stochastic model, water quality, early warning system

  • Concept od predictive hydrodynamic calculations: An overview of the case studies from Serbia

    Dušan Polomčić, Dragoljub Bajić, Jelena Ratković, Vesna Ristić Vakanjac, Marina Čokorilo Ilić (2019)
    groundwater management, hydrodynamic model, multiple-criteria decision making, open cast mine, groundwater source.0

  • Quantitative landslide risk assessment in the city of Tuzla

    Miloš Marjanović, Biljana Abolmasov, Cvjetko Sandić, Miralem Mulać, Petar Begović (2021)
    In the climate-changing conditions, geological environment interacts more dramatically with the urban fabric than before. The urbanization is expansive and more aggressive than before, but so are the weather extremes and long-term climate trends. In effect, many processes which can be triggered by either side, nature or engineering, are becoming more pervasive than before, and such is the case with landslides. Dealing and managing landslides requires few crucial steps, starting from collecting data on landslide location and typology – ...
    "landslides", "risk assessment"
    ... of accuracy and AUC of 0.85 was achieved in landslide susceptibility model. The same can be expected for all subsequent models which incorporate the susceptibility model, such as hazard and exposure. On the other hand, risk model cannot be easily validated. Visually it corresponds well with both ...
    ... realistic risk distribution over the populated areas. Intermediate models, such as susceptibility, exposure, hazard etc., as well as the final risk model suggests good performance, both visually and numerically (high accurancy >75% and AUC of >0.85) and justifies landslide assessment in the future for ...
    ... inventory as a reference; establishing connection between landslide and non-landslide occurrences against the conditioning factors – optimizing the model – fitting the classification function; applying the classification function to the unseen instances in the remaining testing/validating area; outputting ...

  • Fuzzy expert analysis of the severity of mining machinery failure

    Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković (2020)
    Mining machinery failure is almost an everyday occurrence. Usually the failures bare certain consequences, which require additional financial costs to repair and restore the system to its operational state. The consequences are viewed through negative and damaging effects a failure has on the machine, health and safety of the employees, work environment, and on the environment. The removal of the consequences of the failure requires additional financial investment, which has a negative impact on the company’s business. In order ...
    Severity of failure, Severity of failure assessment, Mining machinery, Fuzzy sets, Fuzzy logic

  • Some models for determination of parameters of the soil oscillation law during blasting operations

    Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić (2018)
    ... environment and by particular blasting conditions. 2.2.1. Model 1—Determining the Parameters by Applying the Least Square Method The least square method is mainly used to obtain the parameters K and n representing a common model [5,6]. 2.2.2. Model 2—Determining the Parameters by Applying the Quotient ...
    ... of the relative growth of oscillation velocities and reduced distances for Model 2. The link between the parameters K and n is determined by applying the trapezoidal formula for finding the value of definite integral for Model 3. In doing so, it was noted that all three models can be used to calculate ...
    ... parameter n, all experimental data were taken into account. 2.2.3. Model 3—Determining the Parameters between Parameters K and n is Determined by Applying the Trapezoidal Formula for Finding the Value of Definite Integral In this model we will use the trapezoidal formula [8] to find the approximate value ...

  • Geotehnička istraživanja terena za potrebe izgradnje mosta preko Aleksandrovačkog potoka na autoputu E-80, deonica Niš-Merošina

    Danijela Sušić (2023)
    Geotehnička istraživanja terena, odnosno određene lokacije, izvode se za potrebe projektovanja, odnosno definisanja uslova izgradnje objekata. Njihova osnovna namjena jeste upoznavanje i prikupljanje informacija o sastavu i svojstvima geološke sredine koje bi mogle da nam omoguće planiranje, projektovanje, izgradnju, kao i racionalno korišćenje samog objekta. U ovom radu, detaljno je prikazan način svih izvršenih istraživanja, za potrebe izgradnje mosta na osnovu kojih je urađen grafički dio, proračun nosivosti plitko fundiranog mosta i proračun analize slijeganja terena. Za proračun dozvoljenog opterećenja ...
    geotehnička istraživanja, terenska istraživanja, laboratorijska ispitivanja, geotehnički model terena, plitki temelji

  • Preliminary regional landslide susceptibility assessment using limited data

    Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska (2019)
    In this paper a heuristic approach for preliminary regional landslide susceptibility assessment using limited amount of data is presented. It is called arbitrary polynomial method and takes into account 5 landslide conditioning parameters: lithology, slope inclination, average annual rainfall, land use and maximum expected seismic intensity. According to the method, in the first stage, a gradation is performed for each of the carefully selected conditioning parameters by assigning so called rating points to the grid cells on which the ...
    klizišta, podložnost
    ... ity model. Extraction of a particular land- slide conditioning parameter and repetition of the validation pro- cess is one approach to test model sensitivity (LEE & TALIB, 2005; GUZZETTI et al., 2006). Other approaches for testing the sensitivity of a particular landslide susceptibility model (and ...
    ... 77 % of the total landslides mapped. A landslide susceptibility model with the lowest percent of landslides in classes with very high and high susceptibility is the WAP-TLSR-100. According to this model 58.75% of the region’s Model Susceptibility class Value of W-TLSR Area (km2) Area (%) ...
    ... Total Landslide Susceptibility Rating (TLSR) model is obtained by summing the individual rating points of each parameter and divid- ing the region into five susceptibility zones according to Jenks natural breaks classification. Ver- ification of the TLSR model is then performed by overlaying the landslide ...

  • 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
    ... Измењено: 2023-10-14 04:09:33 Fuzzy Model for Risk Assessment of Machinery Failures Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Fuzzy Model for Risk Assessment of Machinery ...
    ... fuzzy inference approach was used in an outcome calculation. The main benefit of the proposed model is being able to use numerical and linguistic data in a risk assessment model. The proposed risk assessment model, using fuzzy logic conclusions and min–max composition, was used on a mobile crushing machine ...
    ... fuzzy inference approach was used in an outcome calculation. The main benefit of the proposed model is being able to use numerical and linguistic data in a risk assessment model. The proposed risk assessment model, using fuzzy logic conclusions and min-max composition, was used on a mobile crushing machine ...

  • Improving efficiency of thermal power plants through mine coal quality planning and control

    Mirjana Banković, Dejan Stevanović, Milica Pešić, Aleksandra Tomašević, Ljiljana Kolonja (2018)
    Главни циљ контроле квалитета угља у рудницима лигнита је снабдевање термоелектрана угљем чији квалитет мора да се креће унутар одређених квалитативних ограничења. Карактеристике угља могу да утичу на ефикасност, поузданост и расположивост како котла тако и јединица за контролу емисије. У овом раду аутори су презентовали интегрисану симулацију рударског процеса као нови приступ у истраживању променљивости калоричне вредности угља приликом експлоатације комплексног лежишта лигнита. Резултати таквог приступа омогућавају драгоцен увид у перформансе континуалног рударског система у смислу контроле променљивости ...
    mine planning, variability of coal quality, simulation, coal blending

  • 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 model stores al] training examples and compares new data to them. It does not create an explicit model but uses examples to make decisions. For example, K-Nearest Neighbors (KNN). 8. Model-Based Learning - The model builds a generalized model based on the training data. This model is used ...
    ... assess model performance and prevent overfitting. 27 c.Evaluation- Measures accuracy and methodology. Assess the model's accuracy in predicting the correct pump states. Analyze errors and misclassifications to further improve the model. • Model Application a. Prediction - The model is used ...
    ... and F1-score are used. b.Cross-Validation- A technique for assessing how the model will perform on unseen data, helping to evaluate the model's stability and robustness. • Model Application a.Prediction - The model is used to predict the pump's condition in real-time based on current sensor ...

  • A tool for identifying the criticality in the disordered systems with metastable dynamics

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Stefan Graovac, Đorđe Spasojević (2021)
    Физика кондензоване материје

  • Palinomorfe sa lokaliteta Gostuška reka (Stara planina)

    Ivan Rutović (2024)
    U radu su prikazani rezultati palinološkog istraživanja permsko-trijaskih sedimenata sa lokaliteta Gostuška reka. Palinološki kompleksi su detaljno analizirani, što je omogućilo morfološku, taksonomsku i paleoekološku identifikaciju palinomorfi. Istraživanje je pokazalo prisustvo velikog broja spora i polena golosemenica, dok je polen skrivenosemenica zastupljen u manjem procentu. Na osnovu paleoekoloških analiza, zaključeno je da je tokom formiranja sedimenata na lokalitetu vladala aridna klima, sa povremenim vlažnim fazama koje su omogućavale razvoj močvarne vegetacije.
    palinomorfe, paleoekologija, perm - trijas, Stara planina, Gostuška reka
    ... Krstić B., Bogdanović P., Jadranin D., Milenković P., Milošaković R., Fotić P., i Jovanović LJ., 1969: Osnovna geološka karta SFRJ – Pirot 1:100 000. Beograd: Zavod za geološke i geofizička istraživanja. 4Anđelković J., Krstić B., Bogdanović P., Jadranin D., Milenković P., Milošaković RM., Urošević ...
    ... , Rakić M. O., Jovanović LJ., Maslarević LJ., Marković B., Divljan M., i Dordević M., 1977: Tumač za listove Pirot i Breznik. Zavod za geološke i geofizička istraživanja, Beograd, str. 1 – 47. Anđelković, M., 1978: Stratigrafija Jugoslavije: „Paleozoik i Mezozoik". Univerzitet u Beogradu, Minerva ...
    ... Mentor dr Jelena Milivojević, vanr. prof. Rudarsko — geološki fakultet, Beograd . Član komisije: dr Zorica Lazarević, vanr. prof. Rudarsko — geološki fakultet, Beograd . Član komisije: dr Katarina Bogićević, red. prof. Rudarsko — geološki fakultet, Beograd Datum obrade: Rezime U radu ...

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

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)
    ... rameter. Slave parameter for homogenization is coal heating value. The integral model for coal quality control is developed and consists of three sub-models: operational mine scheduling model, stocking model and reclaiming model, fig. 5. According simulated daily or shift mine plan each BWE has working ...
    ... This model, in general, is based on predicted information about the in-situ quality of the coal deposit. Consequently, production scheduling for the purpose of controlling coal quality, e. g., sulfur, have to be based on the predicted data of the contemplated mining benches. The model uses zero-one ...
    ... within pile, fig. 2. The shadings of layer's cross-sections in fig. 2 are corresponding to the percentage of sulfur. The reclaiming model Developed reclaiming model determines the tonnage of coal to be loaded from stockyard piles by reclaimer, so that the total sulfur con- tent of the reclaimed ...

  • From DELA Based Dictionary to Leximirka Lexical Database

    Biljana Lazić, Mihailo Škorić (2020)
    In this paper, we will present an approach in transforming Serbian language Morphological dictionaries from a DELA text format to a lexical database dubbed Leximirka. Considering the benefits of storing data within a database when compared to storing them in textual documents, we will outline some of the functionality that the database has made possible. We will also show how hand-made rules that use category labels lexical entries are marked with can be used to link lexical entries. ...
    Morfološki rečnici, jezički resursi, Leksimirka
    ... adequate markers. 3.2 Leximirka’s lexicographic database model The lexicographic database model of Leximirka, shown in Figure 1, is guided by the Lemon, LMF and Data Category Registry catalog (Stanković et al., 2018). The implemented model provides the ability to store lexico- graphic information ...
    ... lexicographic database and to an online application. In Sections 3.2 and 3.3 we will give a description of Leximirka’s lexicographic database model and data categories model. An overview of the application segments will be provided in Section 4.1. The possibilities for establishing relations among lexical entries ...
    ... ontologies (e.g. by defining morphological categories and synsets) (McCrae et al., 2012). The Lemon model is concise, descriptive, modular and RDF based. At the time of making Leximirka database, Lemon model consisted of five modules: Ontology-lexicon interface – ontolex, Syntax and Semantics – synsem, De- ...

  • Sistem poslovne inteligencije za upravljanje zaštitom na radu u rudarskoj industriji

    Ljiljana R. Kolonja (2016-09-23)
    Postojeća organizacija zaštite na radu na površinskim kopovima uglja često nije umogućnosti da blagovremeno i tačno ukaže na nedostatke, koji mogu u bližoj ilidaljoj budućnosti da budu uzrok narušavanja bezbednosti radnika, ali i uzrokoštećenja materijalnih dobara rudnika. Nemogućnost donošenja pravovremenihodluka je moguće izbeći uvođenjem softverski podržanih sistema za praćenje ianalizu bezbednosti i zaštite na radu.Osnovni cilj ove doktorske disertacije je definisanje metodologije i razvoj modelasistema upravljanja zaštitom na radu, koji će omogućiti savremen, adekvatan isveobuhvatan način praćenja i analize ...
    rudarstvo, bezbednost i zdravlje na radu, poslovna inteligencija,tehnička zaštita, ontologije
    ... razumevanja, modeli se prikazuju dijagramima u kojima su komponente i objekti sistema, kao i njihove veze prikazani grafičkim simbolima. Za potpuni opis modela, uz vizuelni prikaz je neophodno da se neke informacije u modelu izraze tekstom. Najvažnija svojstva dobrog modela su; tačnost ...
    ... ............................... 84 Slika 6.9. Model baze podataka: tabele programskog sistema zaštite ........................... 85 Slika 6.10. Model podataka podsistema o ljudskim resursima ......................................... 86 Slika 6.11. Model podataka podsistema o povredama ............. ...
    ... ju zahteva za razvoj sistema, opis konceptualnog modela programskog sistema i opis modela baze podataka, prikaz 11 komponenti softvera i analitičkih servisa poslovne inteligencije razvijenog sistema kao i verifikaciju razvijenog modela. Sedmo poglavlje prikazuje značaj korišćenja primene ...

  • Production information system of the Pljevlja coal mine

    Božo Kolonja, Ranka Stanković, Filip Vuković (2018)