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Упит dcterms_subject_txt:Open educational resources

468 items

  • Effectiveness Analysis of Different Bucket-wheel Excavators

    Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić (2021)
    Coal production in open-pit lignite mines in the Republic of Serbia is performed with continuous work systems. In addition to coal production, the same systems are used for the exploitation of large quantities of overburden. According to the reliability concept, continuous systems are in linear connection. If the failure occurs in one part of the system, that will produce a downtime of the entire system. The initial and most important factor of continuous systems is the bucket-wheel excavator. It ...
    bucket-wheel excavator, open-pit coal mine, mining, multi-criteria decision methods

  • Optimizacija i planiranje površinskih kopova stohastičkim modelima

    Dejan R. Stevanović (2015-05-29)
    Savremeno rudarstvo izloženo je stalnom trendu pogoršanja uslova poslovanja.Mogućnost ostvarenja ekonomskih i drugih ciljeva rudarskog projektakompromitovana je stalnim pogoršanjem kvaliteta ležišta na kojima se vršieksploatacija, kao i značajnoj dozi neizvesnosti povezane sa geološkim,ekonomskim i tehničkim parametrima proizvodnje. U ovako kompleksnimuslovima poslovanja, matematički modeli sposobni da odgovore značajnimizazovima, odnosno ponude optimalna rešenja kojima se garantuje maksimalnoispunjenje projektovanih ciljeva, nameću se kao neophodnost.Trenutni, konvencionalni pristup optimizaciji i planiranju površinskih kopovazasniva se na algoritmima, razvijenim sredinom prošlog veka čije je opšteobeležje deterministički ...
    površinski kop, planiranje, optimizacija, stohastički modeli, kontrola kvaliteta uglja, neizvesnost.
    ... Sattarvand J. and Niemann-Delius, C. 2008. Perspective of Meta heuristic optimization methods in open pit production planning. Mineral Resources Management, Vol. 24 (4), str. 143-155. Sattarvand, J., 2009, Long-Term Open-Pit Planning by Ant Colony Optimization, doktorska disertacija, The Faculty of Georesources ...
    ... the Athabasca Oil Sands Deposit, Alberta, Canada, Natural Resources Research, Volume 2, str. 49-61 233 Dimitrakopoulos R, Farrelly C, Godoy M, 2002, Moving forward from traditional optimization: Grade uncertainty and risk effects in open pit design, Mining Technology, Vol. 111, str. 82-87. Di ...
    ... relationship, Natural Resources Research, vol. 18, str. 57-63. 238 Lundy, M., Mees, A., 1986. Convergence of an Annealing Algorithm. Math. Prog., vpl. 34, str. 111-124 Malbašić, V., Stevanović, D., Čelebić, M., 2012. Optimization of waste transportation system for open pit Buvač, Tehnika, Beograd ...

  • Conversion of land areas after coal mine closure and reclamation

    Radmila Gaćina, Bojan Dimitrijević, Sanja Bajić (2023)
    Otkopavanje uglja površinski i podzemno praćeno je degradacijom zemljišta, promenom formiranja predela i izmenom flore i faune. Od velikog značaja je razvoj novih naučno utemeljenih pristupa obnovljanje antropogeno poremećenih predela zasnovanih na formiranju rekultivacionih i rudarskih tehnologija. Apsolutno je neophodno obezbediti sveobuhvatno kvalitetno očuvanje zemljišnih i vodnih resursa i odrediti rekultivisano zemljište za novu namenu. U ovom članku je dat pregled najpopularnijih metoda rekultivacije zemljišta i mogućnosti rekultivacije zemljišta nakon završetka rekultivacije i zatvaranja rudnika uglja.
    rekultivacija, melioracija, revitalizacija, otkopavanje uglja, održivi razvoj
    ... RECULTIVA TION This paper is part of research applied to the coal open pit Drmno, which has as general objectives as impact of mining in the area, as well as ecological conversion solutions for coal open pit Drmno (one of the open pits of Kostolac Basin Mining Basin), favoring significant opportunities ...
    ... procedures. It is important to point out that the defined model can be used in all planning and exploitation phases of an open pit mine, regardless of whether it is a new mine or an open mine where exploitation is carried out. The iterative nature of the model enables corrective measures during the imp ...
    ... formation of reclamation and mining technologies. t is absolutely necessary to ensure the comprehensive quality preservation of land and water resources and to designate reclaimed land for a new purpose. This article presents an overview of the ranking most popular methods of land recultivation and ...

  • Hydrogeochemical distribution of Ca and Mg in groundwater in Serbia

    Petar Papić, Jovana Milosavljević, Marina Ćuk, Rastko Petrović (2014)

  • 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

  • Developing Termbases for Expert Terminology under the TBX Standard

    http://drug.rgf.bg.ac.rs/s/repo/item-set/522 (2014)
    ... Obradovié. WS4LR: A Workstation for Lexical Resources. In Proceedings of the Fifth International Con- ference on Language Resources and Evaluation (LREC’06). European Language Resources Association (ELRA), 2006. Ch. Lieske, S$. McCormick, and G. Thurmair. The Open Lexicon Interchange Format (OLIF) Comes ...
    ... concepts from termbases as central resources in a custom in-house scheme to standard formats such as TBX has been provided, by a wizard integrated in the terminological information system supporting the termbases. Keywords: Termbases, TBX standard, Language Resources, Terminol- ogy Integration and Portability ...
    ... with a section with conclusions. 2 Terminological Resources Developed @ FMG Recognizing the importance of terminology in education of future mining engi- neers a team at FMG has initiated several years ago the development of termino- logical resources in the area of mining engineering and geology, both ...

  • Gold and Silver in Serbia

    Jelenković Rade (2011)

  • Heavy metals in lignite and soil of Kostolac-Kovin coal basin, eastern Serbia - comparative analysis with selected cities in Serbia, region, Europe and world

    Bogoljub Vučković, Bojan Dimitrijević (2023)
    The Kostolac-Kovin coal basin with an area of 320 km2, with 5 separate layers of coal and with a total of about 5.7 Bt of geological resources and reserves represents an exceptional potential for coal production in Serbia. The coal resources listed in this way are not fully exploitable, but they represent potential for consideration. In this paper, we deal with the geochemical characteristics of coal seams and perform a comparative analysis of coal affectation on the environment. With ...
    lignite, heavy metals, concentrations
    ... area of 320 km?, with 5 separate layers of coal and with a total of about 5.7 Bt of geological resources and reserves represents an exceptional potential for coal production in Serbia. The coal resources listed in this way are not fully exploitable, but they represent potential for consideration. In ...
    ... Kovin 2 / Open Pit Drmno under running |0 Low M High R. Vel ika M or av a OI II Coal Layer Zn avg. = 40 ppm R. Vel ika M or av a |0 Low M High III Coal Layer Zn avg. = 30 ppm |0 Low M High R. Vel ika M or av a ICoalLayer Pb avg. = 40 ppm Kovin 2 Open Pit Drmno ...
    ... laterally or in depth, but there is a potential for thcir further research outside the existing exploration fields. The general calculation of coal resources for all 5 coal seams yielded about 5.75 B t of coal. 2. GEOCHEMISTRY OF LIGNITE, ACCOMPANYING SEDIMENTS AND SOIL IN THE BASIN AREA Numerous ...

  • Stanje i potencijali mineralnih resursa istočne Srbije

    Jelenković Rade (2014)

  • Global trend and negative synergy: Climate changes and groundwater over-extraction

    Stevanović Zoran (2013)

  • O kenozojskom magmatizmu Srbije - rečima koje razume svaki geolog

    Cvetković Vladica (2014)

  • Mapping the Late Miocene – Pliocene shelf-edge clinoforms across the Pannonian Basin

    Magyar Imre, Radivojević Dejan, Rabagia Anna Maria (2010)

  • Sustainable use of the Kalenić deponies

    Polomčić Dušan, Bajić Dragoljub, Ratković Jelena, Pajić Pajić (2018)

  • Отпад из процеса сагоревања угља као сировина за добијање елемената ретких земаља

    Бојан Земљак (2024)
    Због великог броја индустрија у којима се користе ови ресурси, глобална економија се у великој мери ослања на елементе ретких земаља. Елементи ретких земаља су есенцијална сировина — материјал за развој савремених технологија, али у односу на њихову огромну потражњу, њихово вађење је ограничено и повезано је са значајним утицајима на животну средину. Због њихове ограничене доступности, проблема који се јављају при процесима експлоатације, све више и више земаља почиње да тражи повољније могућности вађења елемената [REE] из секундарних ...
    Елементи ретких земаља, резерве, употреба, представници и методе опоравка елемената ретких земаља
    ... ecearth element resources: opportunities . and challenges. Economic Geology, 110(8), p.1925-1952 [88] Paulick, H. and Machacek, E., 2017. The global rare earth element exploration boom: An analysis of resources outside of China and discussion of development perspectives. Resources Policy, 52, p ...
    ... cCrpaHe KoMmaHuje HapHraTop pecoypcec (eHTJ. Navigator resources) [Morgan, 2012.] [112]. . Tu(opnoB norok (enrun. Gifford Creek), aananna aycrpanuja, eKcrnnmoaranuja je BpmeHa oJl crpaHe KoMmaHuje ApreMHc pecoypcec (eHr. Arfemis Resources Ltd) [Haque, Hughes, Lim, Vernon, 2014.] [74]. . IInanuHa ...
    ... financial perspective. Resources Policy, 53, p. 26-45. [5] Jha, A.R., 2014. Rare earth materials: properties and applications. CRC Press. [6] Dutta, T., Kim, K.H., Uchimiya, M., Kwon, E.E., Jeon, B.H., Deep, A. and Yun, S.T., 2016. Global demand for rare earth resources and strategies for green ...

  • Квантитативна анализа палеофауне Батурског Рзава - Западна Србија

    Бањац Ненад (2014)

  • Палеогена флора Каменице - Paleogene flora from Kamenica

    Lazarević Zorica, Milovanović Ljubica (2014)

  • Water supply and groundwater quality in Republic of Serbia

    Polomčić Dušan, Štrbački Jana, Bajić Dragoljub (2018)

  • Multi-criteria decision analysis for the purposes of groundwater control system design.

    Bajić Dragoljub, Polomčić Dušan, Ratković Jelena (2017)

  • Geodynamic history unveiled from rock archives: The case of central Balkan Peninsula

    Vladica Cvetković (2023)

  • Medical Domain Document Classification via Extraction of Taxonomy Concepts from MeSH Ontology

    Mihailo Škorić, Mauro Dragoni (2019)
    This paper is a result of a task that was presented to attendants of Keyword Search in Big Linked Data summer school, that was organized by Vienna University of Technology, under the Keystone COST action in the summer of 2017. It presents a specific approach to the classification via creation of minimal document surrogates based on the US National medical library’s MeSH ontology, which is derived from the Medical Subject Headings thesaurus. In a series of previously classified medically ...
    document classification, MeSH, ontology, information extraction
    ... on the resources available, specifically the ontology or taxonomy used for the classification (Rakesh et al., 2001).Once established, the system may find wider application. When it comes to the classification of (medical) documents for the Serbian language, it is necessary to prepare resources first. ...
    ... of terminological resources for expert knowledge: a case study in mining”. Knowledge Management Research & Practice Vol. 14, no. 4 (2016): 445–456 Stanković, Ranka, Cvetana Krstev, Ivan Obradović and Olivera Kitanović. “Indexing of Textual Databases Based on Lexical Resources: A Case Study for Serbian” ...
    ... of concept nodes. system, but for a morphologically rich language, such as Serbian, previous lemmatization or other kind of normalization of both resources is necessary. Finding and replacing ontology concepts in the text. As we wanted to find something in the documents (names of the concepts) and then ...