Претрага

Упит dcterms_subject_txt:geological exploration

224 items

  • Trace elements and garnet formation in a distal skarn zone: a case study of the Rudnik deposit, Central Serbia

    Bojan Kostić, Pavle Tančić, Natalija Batoćanin (2024)
    geohemija granata, retke zemlje, fluidne inkluzije, skarnovsko ležište Rudnik

  • Споменица 1991. – 2015. година: 135 година геологије и 70 година рударства на Универзитету у Београду

    главни и одговорни уредник Душан Поломчић (2016)
    Рударско-геолошки факултет
    ... е примене. Зборник радова РГФ, свеска 34., Београд, стр. 265–271. STANIĆ S., 1997: Possibility of application seismic migration in oil-geological exploration. Tehnika, No. 7-8, pp. 153–155. SLIMAK, Š., STANIĆ, S., TRAJKOVIĆ, S., LUTOVAC, S., 1998: Pregled skala koje se koriste u svetu za procenu ...
    ... tectonics of Serbia. Serbian Geological Society, ser. Monographie, 87 pgs, Belgrade. TOLJIĆ M., BASHIR O., 2007. Geological map of Libya 1:250,000, Explanatory Booklet, Sheet: Mourizidie, NF 33-3. Industrial Research Centre, Tripoli. 311 p. TOLJIĆ M., TURKI M. S., 2007. Geological map of Libya 1:250,000 ...
    ... ивачког рада су магнетометрија, палеомагнетизам. Члан EAEG (European Association of Exploration Geophysicists), Срп- ског научног друштва. Организатор 49. конгреса EAEG (European Association of Exploration Geophysicists) у Београду, 1987. го- дине. У пензији је од 1996., а преминуо 2013. године ...

  • 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)
    ... have an exceptionally simple geological structure. Limestone deposits of this area are massive or layered with layer thickness ranging from 0.20–0.80 m, the direction of propagation is NE–SW and a slope of about 42˝ towards the southwest. These rocks, in engineering geological terms, belong to a group of ...
    ... [11]. During previous investigation and exploitation works, no significant burst deformations, which would significantly influence the process of exploration and exploitation, were noted in the deposit. Only after blasting do blocks of rock of 0.50 m3 occur, which could be attributed to the effect of small ...

  • Prognoza operativne efikasnosti aktivnog podzemnog rudnika zasnovana na teoriji sivih sistema

    Svetlana M. Štrbac-Savić (2016-06-10)
    Efikasnost predstavlja preduslov za opstanak svake rudarske kompanije, posebno u uslovima izuzetno konkurentnog trţišnog okruţenja kao što je to rudarska industrija. Efikasnost oznaĉava sposobnost kompanije da ispuni svoje kratkoroĉne ili dugoroĉne ciljeve. Operativna efikasnost se definiše kao odnos izmeĊu ulaznih parametara potrebnih za odvijanje proizvodnje i pokazatelja dobijenih proizvodnjom. U kontekstu rudarskog poslovanja, operativna efikasnost se odnosi na vreme potrebno da se mineralno dobro transformiše u novĉana sredstva. Visoka operativna efikasnost se postiţe kada se ostvari prava kombinacija karakteristika ...
    podzemni rudnik, operativna efikasnost, prognoza, teorija sivih sistema, stohastiĉke diferencijalne jednaĉine, simulacija
    ... irnik, pump station- pumpna komora, crusher-drobilica, ore bin-bunker za rudu, skip filling station- utovarno mesto, sump-taložnik u rudniku, exploration drilling-istražno bušenje (pruzeto iz [HAMRIN97]) Tehnološki proces proizvodnje rude sastoji se iz sledećih tehnoloških faza:  otkopavanje ...
    ... region, System Sciences and ComprehensiveStudies in Agriculture, 1, pp. 60-66, 1986. [YI87] Yi Desheng, Grey model (GM) and technician forecast,Exploration of Nature, 4, pp.75-81, 1987. [YANG14] Yunchol Jang, Grey Power Models Based on Optimization of Initial Condition and Model Parameters, Grey ...
    ... quality for youngsters and children, Sport Science in Guizhou Province, 2, pp.1-5, 1986. [ZHAO87] Zhao Songnian, On decision of macrosystems, Exploration of Nature,4, pp. 119-128, 1987. [ZHAO11] Xi Zhao, Liang Li, Xi-shuan Zhang, Analysis of operating efficiency of Chinese Coal Mining industry ...

  • Soil oscillation law parameter determination with the application of Lagrange’s theorem at “Kovilovača“ open pit

    Suzana Lutovac, Nebojša Vidanović, Čedomir Beljić, Zoran Gligorić (2015)
    ... have an exceptionally simple geological structure. Limestones of this area are mas- sive or layered with layers of thickness from 0.20 to 0.80 m, the direction of propagation is NE-SW and a slope of about 42º towards the southwest. These rocks, in engineering and geological terms, belong to a group ...
    ... [7]. During previous exploitation and exploitation works, no significant burst deformations, which would significantly influence the process of exploration and exploitation, were noted in the deposit. Only after blasting, blocks of rocks 0.50 m3 occur, which could be attributed to the effect of small ...

  • The application of ArcGIS for assessing the potential of solar energy in urban area: The case of Vranje

    Boban Pavlović, Milica Pešić-Georgiadis (2019)
    In order to determine the solar energy potential for a specified location, it is crucial to consider the latitude, altitude, slope, terrain morphology, atmospheric conditions, etc. Such a complex calculation and mapping of solar energy can be done using the ArcGIS geoprocessing tool, named Area Solar Radiation (ASR). By using the ASR tool, supported with the adequate input data, it is possible to calculate the maximum solar radiation energy (irradiation) for a defined area and for a specified time ...
    Obnovljivi izvori energije, potencijal solarne energije, GIS, mapiranje solarnog potencijala
    ... (Rich P.M., Fu P., 1999). Thus, the map of direct solar radiation will represent the Sun's trajectory, which depends on the latitude of the exploration area or points and the specified time interval. Each sector displayed on the map will have a unique value, along with its azimuth and zenith ...

  • Classification of Terms on a Positive-Negative Feelings Polarity Scale Based on Emoticons

    Mihailo Škorić (2017)
    The goal of this paper is to draw attention to the possibility of using emoticon-riddled text on the web in language-neutral sentiment analysis. It introduces several innovations in the existing framework of research and tests their effectiveness. It also presents a software tool especially made for that purpose, explains how it builds a database with sentimental value of terms and offers the user manual. Finally, it presents a software tool that tests the new database and gives some examples ...
    data mining, information extraction, emotions, text on the web
    ... generally similar researches can find a wide variety of applications divided into two groups. Social and demographic research: – Marketing research: exploration of current vs alternative approach to the marketing of products and services. This is the most common use of similar studies primarily for financial ...

  • 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
    ... there still exists limited understanding of the reaction mechanisms involved in the chemical transformations of CO». 4. CARBON GEOLOGICAL STORAGE OPTIONS Geological storage of CO» refers to the permanent and safe injection and placement of CO» in underground formations. Potential storage formations ...
    ... existing applications are being developed further for design and operation of geological storage. Figures 4.1 and 4.2 indicate the various kinds of trappings over time that seal CO» in their stored form in the geological formation. sohublity trappirg tr ap pi ng co nt ri bu ti on (0 to ...
    ... formations Depleted oil reservoir Figure 4.3 Various geological storage media in onshore environment [53] 4.1. Injection into Deep Saline Aquifers Injecting carbon dioxide (CO) into deep saline aquifers is one of four main options for the geological storage of CO- to decrease anthropogenic greenhouse ...

  • 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
    ... implementation of the model. O Š' U l—E e > @ –> eee > Problem Get the data L L, Algorithm selection observation Model validation Data exploration Data preparation Figure 6.8 illustrates the steps of experimentation in machine learning that were used in this study. In the problem observation ...
    ... are the minimum and maximum plunger displacements, respectively, while yyax and Ynninare the minimum and maximum plunger loads. In the data exploration phase, the data should be examined, checked for correlations, and visualized. After manual classification of the logs in this study, the number ...

  • Razvoj integralnog modela za optimizaciju diskontinualnog sistema proizvodnje na površinskim kopovima nemetala

    Miodrag Čelebić (2024)
    Izbor optimalne mehanizacije u diskontinualnom sistemu transporta je jedna od najvažnijih odluka koju treba donijeti prilikom projektovanja površinskih kopova. Pri izboru optimalne mehanizacije, uticaj ima veliki broj faktora, kako prirodnih – geoloških i ekoloških, tako i tehničkih, ekonomskih i socijanih. Neki od njih se mogu izraziti numerički, u određenim mijernim jedinicama, a neki opisno, lingvističkim varijablama, shodno uslovima koji vladaju na rudnim ležištima, a koje karakterišu visok stepen neizvjesnosti i neodređenosti kako prilikom istraživanja, tako i tokom procesa eksploatacije ...
    izbor mehanizacije, tehnologija eksploatacije, diskontinualani sistem, ekspertsko odlučivanje, lingvističke varijable, MCDM, FAHP

  • Optimizacija površinskog kopa Ciganuša – Škorac

    Vasilije Zejak (2024)
    U radu se govori o značaju optimizacije u savremenom rudarstvu i kako nam to softveri štede vreme, novac i olakšavaju procese planiranja.Konkretno u izradi ovog rada korišćen je softverski paket Whittle.Da bi se optimizacije mogla uspešno sprovesti, potrebno je konstruisati pre svega blok model ležišta kao i definisati niz tehno – ekonomskih parametara. Na osnovu tih podataka definiše se optimalna kontura i dinamika razvoja radova. U skladu sa definisanim podaci i odgovarajućim podlogama definisana je optimalna kontura površinskog kopa Ciganuša ...
    optimizacija, površinski kop Ciganuša - Škorac, blok model, strateško planiranje, optimalna kontura, dinamika razvoja, fazni razvoj
    ... – 2nd Edition. Littleton, Colorado: Society for Mining, Metallurgy,and Exploration, Inc. (SME). 13.Kenedy, A. B., & J.Whittle. (1990). Sur/ace Mining – 2nd Edition. Colorado: Society for Mining, Metallurgy,and Exploration, Inc. (SME). 14.Kržanović P. D. (2016). Modeli za optimizaciju graničnog ...
    ... Jean-Michel Rendu. (2014). 4n imtroduction fto cut-off grade estimation (Drugo izdanje izd.). Engelwood, Colorado: Society for Mining, Metallugy & Exploration (SME). 105 Optimizacija površinskog kopa Ciganuša – Škorac 11.Kakha, G. H. (2022). Design of Open Pit Mines using 3D Model in Two- element ...

  • Groundwater resources for drinking water supply in Serbia´s Southeast Pannonian basin

    Dušan Polomčić, Bojan Hajdin, Marina Ćuk, Petar Papić, Zoran Stevanović (2014)
    menadžment podzemnih voda, monitoring, kvalitet podzemnih voda, bilans, baza podataka

  • 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

  • Remedijacija otpadnih voda Rudnika prirodnim zeolitom

    Igor Veličković (2024)
    U radu je razmatrano prečišćavanje otpadnih flotacijskih voda sa područja rudnika Rudnik prirodnim zeolitskim tufom sa planine Jastrebac. Prečišćavanje otpadnih flotacijskih voda sa područja rudnika Rudnik prirodnim zeoliskim tufom sa obronaka planine Jastrebac pokazala se veoma efikasnom. Naime, u tri otpadne flotacijske vode utvrđen je povišen sadržaj arsena, hroma, gvožđa, mangana, kao i nikla. Jednostavnim tretmanom zeolitskim tufom iz ovih voda uklonjeni su svi ovi elementi. Sadržaji gvožđe i mangana su sniženi od 95 do 99 %, dok su ...
    flotation waste water, zeolite tuff, purification
    ... 2020. 'Waste rocks and medieval slag as sources of environmental pollution in the area of the Pb-Zn Mine Rudnik (Serbia) Journal of Geochemical Exploration, Volume 218, 106629. Zdravković, A., Cvetković, V., Pačevski, A., Rosić, A., Šarić, K., Matović, V., Erić, S., 2017. Products of oxidative ...
    ... the Australian Institute of High Energetic Materials Zeolites for water and wastewater treatment: An overview. Tošović, R., 2000. Genetic and Geological-Economic Modelling of Polymetallic Deposite Rudnik (Serbia). Doctoral dissertation. University of Belgrade, Faculty of Mining and Geology, pp ...

  • Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)

    Miloš Radonjić (2020)
    This study presents new discoveries of vascular plants and the trace fossil Dictyodora liebeana (GEINITZ) from the Devonian–Carboniferous Kučaj-Zvonce flysch of the Carpatho-Balkanides and the implications of this fossil association for its sedimentary setting. The occurrence of the described plant debris in a deep-marine environment indicates the presence of hyperpycnites within the siliciclastic turbidites exposed at the Kostadinovica locality. The sedimentological data and the characteristics of the fossil material support the proposed model in which the sediment was at ...
    Mississippian flora, Dictyodora liebeana (GEINITZ), hyperpycnites, Kučaj-Zvonce flysch, Carpatho-Balkanides
    ... is available at: www.dr.rgf.bg.ac.rs 2020 | 73/3 | 131–142 | 12 Figs. | www.geologia-croatica.hr Journal of the Croatian Geological Survey and the Croatian Geological Society 1. INTRODUCTION The Middle Devonian to Early Carboniferous turbiditic siliciclas- tic succession of the central part ...
    ... 14241/asgp.2020.06 MUTTI, E., BERNOULLI, D., RICCI LUCCI, F. & TINTERRI, R. (2009): Turbidites and turbidity currents from Alpine ‘flysch’ to the exploration of continental margins.– Sedimentology, 56, 267–318. doi: 10.1111/j.1365-3091.2008.01019.x ORR, P. (1994): Trace fossil tiering within event beds ...
    ... the position of the Carpatho-Balkanides in Serbia. (b) Tectonic units of the Car- patho-Balkanides (modified after KRÄUTNER & KRSTIĆ, 2002). (c) Geological sketch map of the studied area (modified after VESELINOVIĆ et al., 1964b; KRÄUTNER & KRSTIĆ, 2003). Arrow indicates the position of the studied ...

  • Advancing Sentiment Analysis in Serbian Literature: A Zero and Few-Shot Learning Approach Using the Mistral Model

    Milica Ikonić Nešić, Saša Petalinkar, Mihailo Škorić, Ranka Stanković, Biljana Rujević (2024)
    Ova studija predstavlja analizu sentimenta srpskih starih romana iz perioda 1840-1920, koristeći veliki jezički model (LLM) Mistral za tehniku učenja sa zasnovani na takozvanim "zero" i "few-shot" pokušajima. Glavni pristup uvodi inovacije osmišljavanjem istraživačkih upita (promptova) uključuju tekst sa uputstvom za klasifikaciju bez primera i na osnovu nekoliko primera, omogućavajući jezičkom modelu da klasifikuje osećanja u pozitivne, negativne ili objektivne kategorije. Ova metodologija ima za cilj da pojednostavi analizu osećanja ograničavanjem odgovora, čime se povećava preciznost ...
    zero-shot, few-shot, sentiment, Serbian, Mistral model

  • Одређивање оптималних параметара цевовода за двофазни проток

    Николина Ћурчић (2024)
    Eфикасно управљање протоком флуида је кључно за оптимизацију перформанси система и обезбеђивање оперативне сигурности. Двофазни ток, који подразумева истовремено присуство течне и гасне фазе унутар цевовода и измењивача топлоте, представља један од најсложенијих аспеката динамике флуида. Овај феномен намеће јединствене изазове који захтевају дубоко разумевање и прецизно планирање. Ефикасно управљање двофазним током није само кључно за одржавање ефикасности система, већ је и неопходно за спречавање потенцијалних проблема као што су повећана ерозија, неочекиване флуктуације притиска и ризици по безбедност. У ...
    евовод, оптимизација, двофазни проток, параметри цевовода, трошкови
    ... Arya, A. K. (2022). A critical review on optimization parameters and techniques for gas pipeline operation profitability. owrma! of Petroleum Exploration and Production Technology 12, 3033—3057. Canada, E. C. (2023, August 9). Pipeline 101 — Four Diffjerent Types of Pipelines. Retrieved from ...

  • Model za optimizaciju graničnog saržaja metala u rudi u funkciji dugoročnog planiranja površinskih kopova

    Daniel P. Kržanović (2016-06-14)
    Optimizacija graničnog sadržaja metala u rudi jedan je od osnovnih koraka u planiranju i dizajniranju površinskih kopova i ima za cilj postizanje maksimalne neto sadašnje vrednosti (NPV). Iz tog razloga, optimizacija graničnog sadržaja i danas je predmet mnogih istraživanja u rudarskoj nauci, sa ciljem rešavanja praktičnih problema u eksploataciji ležišta.Dugoročno planiranje eksploatacije na površinskim kopovima podrazumeva sagledavanje svih relevantih parametara i faktora (geologije rudnog ležišta, tehnologije proizvodnog procesa, kapaciteta otkopavanja i prerade, troškova, cena metala, iskorišćenja i dr) kako ...
    površinski kop, dugoročno planiranje, optimizacija graničnog sadržaja, maksimizacija neto sadašnje vrednosti (NPV).
    ... cut--off grade estimation, Society for Mining, Metallurgy and Exploration, Inc. 292 Rendu, J.M., 2014, An introduction to cut-off grade estimation, ISBN 978-0-87335- 393-9, Second Edition, Society for Mining, Metallugy & Exploration (SME), Engelwood, Colorado. Roman, R.J., 1974, The role ...
    ... off grade optimization, maximization of net present value (NPV). Scientific field: Mining Engineering Special scientific field: Exploration of hard mineral resources and rock mechanics UDC: 519.863/.87:553.9 622.271:622.33(043.3) Posvećeno Mojim ...
    ... design of surface mines. In SME, & B. A. Kennedy (Ed.), Surface Mining (Second ed.). Littleton, Colorado, USA: Society for Mining, Metallurgy and Exploration Inc., pp. 459-475. Asad M.W.A., Dimitrakopoulos R., 2013, A Heuristic Approach to Stochastic Cutoff Grade Optimization for Open Pit Mining Complexes ...

  • A comparative study of the molecular and isotopic composition of biomarkers in immature oil shale (Aleksinac deposit, Serbia) and its liquid pyrolysis products (open and closed systems)

    Gordana Gajica, Aleksandra Šajnović, Ksenija Stojanović, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from immature (0.41% Rr) oil shale samples (Aleksinac deposit) and liquid products obtained by pyrolysis in open (OS) and closed (CS) systems are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in liquid products is determined. The applicability of pyrolysis type, numerous biomarkers and carbon isotopic compositions (δ13C) of n-alkanes in liquid pyrolysates is established. Pyrolysis experiments were ...
    Uljni šejl, Aleksinac, organska supstanca, otvoreni i zatvoreni sistem pirolize, biomarkeri, izotopski sastav ugljjenika

  • Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic

    Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)
    Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...
    mehaničke metode, proizvodnja nafte, fazi logika, donošenje odluka, optimizacija
    ... evidential reasoning. Reliab. Eng. Syst. Saf. 1995, 47, 103–118. [CrossRef] 19. Kostić, A. Ležišta i istraživanje nafte i gasa [Deposits and exploration of oil and gas]. Univerzitet u Beogradu, Rudarsko-Geološki Fakultet: Beograd, Serbia, 2015; p. 260. 20. Teodorovic, D.; Vukadinovic, K. Traffic ...
    ... parameters (A), which relate to (A1) energy forms and energy sources, (A2) automatic regulation and utility management, and (A3) service; • Physical-geological parameters (B) respectively: (B1) depth, (B2) oil production, (B3) temperature, (B4) fluid density, (B5) viscosity, and (B6) well deviation; • ...