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Упит dcterms_subject_txt:key block theory

272 items

  • Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry

    Steven Manders, Milorad Pantelić, Vladimir Milisavljević, Alberto Martinetti (2021)
    Self-engineering is a relatively new branch of knowledge that aims to understand how systems could “autonomously” re-configure or repair themselves without the intervention of the operators. A direct field of application is within the maintenance spectrum. Having systems or machines capable of self-detecting or even self-repairing could represent a game-changer, in capital asset fields such as the mining industry in particular. This paper aims to investigate the possible benefits and challenges of self-engineering / self-maintenance concerning mining machines, specifically bucket-wheel ...
    self-engineering, self-maintenance, maintenance operations, mining industry, bucket-wheel excavator, gearbox revitalization

  • Analiza pouzdanosti dozera angažovanih na površinskim kopovima RB Kolubara

    Filip Miletić, Dragan Milčić, Miloš Tanasijević, Miloš Milovančević (2021)
    U radu je izvršena uporedna analiza pouzdanosti transportnih sistema dozera koji rade na površinskim kopovima Rudarskog basena Kolubara. Period za koji je vršena analiza je prvih deset godina eksploatacije. Efikasnost tehnološkog procesa na otkopavanju korisne mineralne sirovine i otkrivke u velikoj meri zavisi od rada dozera. Iskorišćene su matematičke metode za aproksimaciju i identifikaciju zabeleženih vremena u radu, kako bi se dobili analitički pokazatelji pouzdanosti. Na ovaj način se bitno podiže kvalitet upravljanja procesom eksploatacije i održavanja mašina na ...
    dozeri, pouzdanost, kolubarski ugljeni basen
    ... delova i sistema u okruženju Microsoft Excel, Infoteh–Jahorina Vol. 10, Ref. C-8, p. 273-277, Mart 2011; [8] Ashish S., Muni S. Regression analysis - Theory, Methods, and Applications, Springer-Verlag New York, 1990.; [9] Milčić D. Pouzdanost mašinskih sistema, Univerzitet u Nišu, Mašinski fakultet, 2005 ...

  • Geotechnical zoning of the terrain along the first section of E-80 highway in Serbia – SEETO route 7

    Dragoslav Rakić, Zoran Berisavljević, Irena Basarić, Snežana Bogdanović, Jovana Janković (2019)
    Part of E-80 highway that passes through Serbia (from the city of Nis to the administrative border Merdare) is 77 km long. The highway is divided into two sections: the first from Nis to Plocnik (39.4 km long) and the second from Plocnik to the administrative border with Kosovo. The route is designed through a typical plain and hilly terrain in which different geological units are dominant: crystalline schists, neogene sediments of foothills and quaternary sediments in the valley ...
    ... GEOLOGICAL CONDITIONS IN THE ZONE OF HIGHWAY ROUTE Regional rupture pattern indicates two systems of perpendicular structures that form a block structure of investigated terrain (Figure 2). The most prominent is the fracture zone in the central part of the route in Prokuplje area, general ...

  • 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"
    ... (Fig. 8). Only the housing sector land use types entered the inventory of elements at risk, since only these had precise population estimates per block. The final map was averaged across housing blocks, since they represent the target risk units. 5 DISCUSSION AND CONCLUSION Figures 5-7 indicate ...

  • Анализа утицаја искоришћења у преради на резултате оптимизације површинских копова

    Стефан Митић (2024)
    Одређивање оптималних граница површинског копа је сложен и итеративни процес који захтева мултидисциплинарну експертизу, софистициране технике анализе и пажљиво разматрање геолошких, рударских, економских,техничких, еколошких и друштвених фактора. Оптимизација подразумева генерисање серије шкољки, површинског копа на основу различитих фактора прихода (Revenue factor) са итеративним кораком промене цене метала у односу на базну цену. Свака генерисана шкољка представља инкрементално повећање запремине резерви према инкременталном повећању продајне цене метала. Велики број техно -економских фактора утиче на овај процес, и промена сваког од њих ...
    оптимизација површинског копа, анализа границе копа, оптимална контура копа, лежиште Бувач, профит, искоришћење у преради, трошкови прераде руде
    ... Optruaton | GMSUM 542 f Edt Comstrants | ___Fe (onmej o Ž 74 - 32| | [6p Ppressons | |D_MSID 542 f. |O serEement| |__Feđomme) o Ž 74 7 – a| . Outut Block processing cost acjustment Tactors- |O None (8)Mode! O Cslculafe- Processina Path Groups % Defnion 'ChackDsls- ep Gancal Recepi Cnnuka 4.14. ...
    ... |sama Proc:CoEt c Rocov. Raiog aut Lowacut Trresh 'Constants | |__Fa nonne) o 7 i=l os 7 z| 2| [GGp UserElement | |__Fa omne) o | i=l og 7 [Wnl Block processing cost adiustment factors Cnone (9Mogel O Caloatats: || Processing Path Groups Name Defnion Edt GnectData ep OGancsl ocep! Cnuka 4 ...
    ... Oyeopounoe naaHupatba noespuuHcKux KonoGa. beorpal: Py}lapcKo-reoomku (pakynTerT. 17.Lane, K. F., 1988. The Economic Definition of Ore Cutoff Grades in Theory and. Ist edition ed. s.l.:Communications Ltd. 18.Lee, T. D., 1984. Planning and mine feasibility study—4n owne?r s perspective. Spokane, Proceedings ...

  • Low-temperature phase transition and magnetic properties of K3YbSi2O7

    Predrag Dabić, Volker Kahlenberg, Biljana Krüger, Marko Rodić, Sabina Kovač, Jovan Blanuša, Zvonko Jagličić, Ljiljana Karanović, Václav Petříček, Aleksandar Kremenović (2021)
    alkalni silikati elemenata retkih zemalja, fazni prelazi, magnetne karakteristike, razdvajanje kristalnog polja, silikati lantanica
    ... modifications were determined. The magnetic properties of K3YbSi2O7 are interpreted based on the features of its crystal structures. Using group theory, the structural phase transition between �- and �0-K3YbSi2O7 was analyzed in more detail and its possible influence on the magnetic properties of ...
    ... both modifications were determined. The magnetic properties of K;YbSi,O7 are interpreted based on the features of its crystal structures. Using group theory, the structural phase transition between f- and £’-K3YbSi,O, was analyzed in more detail and its possible influence on the magnetic properties of K;YbSi ...
    ... 589 LT phase transition and magnetic properties of K3;YbSi,O7 3.2. Symmetry relationships between two K3YbSi2O7 poly- morphs Considering group theory, the structures of our two poly- morphs of K3YbSi2O7 are in a crystallographic group– subgroup relationship: the low-temperature-induced transi- ...

  • Alpine thermal events in the central Serbo-Macedonian Massif (southeastern Serbia)

    Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Andreas Wetzel, Irena Peytcheva, Albrecht von Quadt (2015)
    General Earth and Planetary Sciences

  • Multiple-Criteria Decision-Making in Mine Development Planning

    Sanja Bajić (2023)
    The Borska Reka ore deposit is an experimental location where developed methodologies have been applied. It is the largest ore body within the Bor mining complex, which has been the subject of numerous studies and analyses for more than three decades. The paper focuses on the application of FAHP and the VIKOR method to address ranking of alternatives and select the optimal mining method by means of fuzzy multicriteria optimization.

  • GIS Application Improvement with Multilingual Lexical and Terminological Resources

    Ranka Stanković, Ivan Obradović, Olivera Kitanović (2010)
    ... Database with Lexical Semantic Networks. Dordrecht: Kluwer Academic Publishers ISO (2000). 1087-1, Terminology work -- Vocabulary -- Part 1: Theory and application. ISO (2008). ISO/TC 37/SC 4 N453, N330 Rev.16, ISO FDIS 24613, Language resource management — Lexical markup framework (LMF) ...

  • Formative evaluation of e-learning projects with the logical framework approach

    Roberto Linzalone, Giovani Schiuma, Ivan Obradović, Ranka Stanković (2015)
    ... instruction in e-learning, Innovations in Education & Teaching International, 43(1), 2006. [19] Stufflebeam D.L., Shinkfield A.J., Evaluation Theory, Models, and Applications, Jossey-Bass, San Francisco, CA, 2007. [20] Stufflebeam D.L., New directions for evaluation, no. 89, Spring 2001, ...
    ... recognizes the critical role of the 'internal coherence', in the design phase, for the ultimate success of the project. Internal coherence is a key element of analysis both for the project's funder, and for the applicant organization. There are different EMs that focus on the internal ...
    ... can be defined as a simple and effective methodology to assess the internal coherence and consistency of a project, through the identification of key management elements (activities, resources, outputs, purposes / objectives), functions (social, technical, economic, environmental, etc.) that ...

  • Analiza uporednog praćenja temperature površine ohlađenih materijala pri njihovom zagrevanju do ambijentalne temperature

    Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Katarina Nestorović (2021)
    U datom eksperimentalnom radu su termografskim metodama ispitivane termofizičke karakteristike različitih materijala. Za ispitivanja su izabrani mesingani niovčić, ugalj i pelet, jer imaju različita termoizolaciona svojstava i različito stanje površine. Uzorci su najpre hlađeni, a zatim je njihovo zagrevanje na sobnoj temperaturi praćeno termalnom kamerom. U drugom delu eksperimenta, korišćena je impulsna termografija, a zagrevanje površine uzoraka vršeno je svetlosnom pobudom.
    termografija, impulsna termografija, nedestruktivno testiranje materijala, mesing, ugalj, pelet

  • Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides

    Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor (2019)
    Internal Dinarides, Drina-Ivanjica thrust sheet, Deformation history, K–Ar dating, Obduction, Structural analysis
    ... Paldontologie- Abhandlungen, 253(2—3), 293—311. Gerzina, N., & Csontos, L. (2003). Deformation sequence in the Vardar Zone: surroundings of Jadar Block; Serbia: Ann. Umniv. Sci. Budapestinensis. Sect. Geol, 35, 139—140. Goffć, B., Michard, A., Kienast, J. R., & Le Mer, O. (1988). A case of ob ...
    ... and applications of the illite Kibler index: measuring reaction progress in low-grade metamorphism. Diagenesis and Low-Temperature Metamorphism, Theory, Methods and Regional Aspects, Seminarios. Sociedad Espanola: Sociedad Espanola Mineralogia (pp. 53—64). Agard, P., Zuo, X., Funiciello, F., ...
    ... Late Jurassic-Early Cretaceous age population. Tectonic evolution of the Drina-Ivanjica thrust sheet Fig. 3 Fotographs and interpretations. of key observations. The stratigraphic younging direction is upwards in all pictures. For outcrop locations see Fig. 2a. a Remnants of tight to isoclinal ...

  • A Tel Platform Blending Academic And Entrepreneurial Knowledge

    Ivan Obradović, Ranka Stanković, Jelena Prodanović, Olivera Kitanović (2013)
    ... The Open Courseware Movement in Higher Education: Unmasking Power and Raising Questions about the Movement's Democratic Potential. Educational Theory, 63(1), 87-110. [3] Bissell, A. N. (2009). Permission granted: open licensing for educational resources. Open Learning, 24(1), 97-106. [4] ...

  • Evidence for Ladinian (Middle Triassic) platform progradation in the Gyulakeszi area, Tapolca Basin, Western Hungary: Microfacies Analysis and Biostratigraphy

    Zsolt Robert Nagy, Nevenka Đerić, Sándor Kovács, Anna Oravecz-Scheffer, Felicitász Velledits, Olga Piros, Gabor Csillag (2014)
    anizik, ladin, karbonati, litostratigrafija, biostratigrafija, konodonti, radiolarije, dijageneza
    ... frame- lowing the Permian- 'Triassic biological crisis (Flagel 1982, 2002; Senow- bari-Daryan et al. 1993). This factor with the Late Ani- sian block tectonics coupled with sea-level rise in the builders were less important fo: area, has resulted in widespread platform progradation (Farabegoli ...
    ... of the study area (northwest of Mindszent- k4lla, Fig 1c) (Budai et al. 1999). During the Pelsonian (Balatonic45 ammonoid zone), synsedimentary block faulting. has caused the breakup of the uniform ramp and abrupt change in facies development (Fig. 2). Based on Budai & Veros (1992), platform ...
    ... ?SANDOR KOVACS?, ANNA ORAVECZ-SCHEFFER , FELICITASZ VELLEDITS', OLGA PIROS* & GABOR CSILLAG* Received: January 2, 2014; accepted: May 14, 2014 Key words: Anisian, Ladinian, carbonates, lithostratigraphy, biostratigraphy, conodonts, radiolarians, diagenesis, correlations. Abstyact. A shallow ...

  • Demise of the Wetterstein Carbonate Platform and onset of the Dachstein Carbonate Platform recorded in deep-water successions of the East Bosnian-Durmitor megaunit (Pliješevina, northern Montenegro, Dinarides)

    Milica Mrdak, Eva Wagerer, Milan Sudar, Nevenka Djerić, Martin Đaković, Hans-Jürgen Gawlick (2024)
    Triassic, Carnica event, clay mineralogy, conodont biostratigraphy, Neo-Tethys

  • 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
    ... latter re- source, SIMPLE, constitutes the semantic level of a quadri- partite Italian lexicon. Its structure is inspired by Gener- ative Lexicon theory (Pustejovsky, 1995) and in particular the notion of qualia structure which is used to organise the Semantic Units (SemUs) which constitute the basic ...
    ... Ken Farø, et al., editors. (2003). Den danske ordbog, bd. 1-6, volume 1-6. Gyldendal. https://ordnet.dk/ddo en. Fellbaum, C. (2010). WordNet. In Theory and applica- tions of ontology: computer applications, pages 231– 243. Springer. Gantar, P. and Krek, S. (2011). Slovene lexical database. In Natural ...
    ... dictionary, which is applicable to further meanings related There are cases when the senses may be equal but the definitions in both dictionaries differ in key aspects none There is no match for this sense Table 1: Semantic relationships according to SKOS used for WSA task were selected based on the Danish ...

  • Модел померања терена услед утицаја рударских радова на основу радарских сателитских снимака

    Зоран Гојковић (2023)
    Површински коп, као систем који обезбеђује енергетску стабилност или снабдевање сировинама које су од изузетне важности за привредни напредак, својим функционисањем утиче на околна насељена места. Међу бројним аспектима овог утицаја, може се издвојити издвојити и анализирати утицај вертикалних и хоризонталних померања која се јављају на површи терена. Мониторинг вертикалних и хоризонталних померања површи терена околних насељених места треба да има што бољу временску резолуцију (временски период између праћења деформација) како би се вертикална и хоризонтална померања контролисала и ...
    Сентинел 1 интерферометрија, слегање, Перманентни скатерери, Костолац

  • VENTEX: An Expert System for Mine Ventilation Systems Analysis

    Ranka Stanković, Nikola Lilić, Ivan Obradović (1996)
    Analiza sistema za ventilaciju je komleksan proces, koji bazira na proračunu brojnih parametara, koji se odnose na: stanje mreže, provetrenost, stabilnost sistema, gubitke vazduha, klimatske uslove, gasno stanje, ugroženost od požara i opasne prašine. Navedeni problemi se uspešno rešavaju paketom SimVent, ali potpuno razumevanje i korišćenje dobijenih rezultata zahteva angažovanje iskusnog specijaliste iz oblasti ventilacije. Rešenje je nađeno u kreiranju ekspertnog sistema VENTEX, čija je baza znanja formalizacija ekspertskog znanja iz oblasti ventilacije rudnika. U radu je prikazana metodologija ...
    ekspertni sistem, ventilacija
    ... reliable solution for this problem is vital for the safety of the working process in mines with underground exploitation. Contemporary mining theory already operates with a number of mathematical methods which can be used to solve mine ventilation problems. These methods are used in current ...
    ... consists of facts and heuristics which can be represented by means of rules, frames, semantic networks and other formalisms. Since knowledge is the key factor in problem solution and decision making, the quality and usability of an expert system is basically determined by the accuracy and ...

  • The analysis of the geothermal energy capacity for power generation in Serbia

    Jana Stojković, Goran Marinković, Petar Papić, Mihailo Milivojević, Maja Todorović, Marina Ćuk (2013)
    Renewable Energy, Sustainability and the Environment
    ... ~27315 (3) The Giggenbach [9] Na-K geothermometer has formula: t [ C] Na K � � � � � � � � 1390 175 27315 . log . (4) Fundamental theory of geothermometers Silicon is second highest element (first is oxygen) in the Earth's crust. It is a metalloid, under carbon in the Periodic table ...
    ... generate 70 MWt, of which some 30 MWt the Vranjska Banja alone. Total power (for the five tested resources) is estimated at about 2200 TJ per year. Key words: geothermal water, geothermometer, power generation, Serbia Introduction Chemical and isotopic geothermometers are important 'tools' in the research ...

  • Investigation of quantitative indicators of anisotropy based on longitudinal elastic waves propagation velocities with uncertainty

    Miloš Gligorić, Jelena Majstorović, Suzana Lutovac (2018)
    ... Ministry of Education, Science and Technological Development, Republic of Serbia. REFERENCES ALEFELD G. and MAYER G. (2000) Interval analysis: theory and applications. Journal of Computational and Applied Mathematics, 121, pp. 424–464. ESBERT R. M. (2007) Alteration of granite stone used in building ...