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Упит dcterms_subject_txt:equipment selection

240 items

  • Modeliranje tehnoloških procesa u rudarstvu u uslovima nedovoljnosti podataka primenom teorije grubih skupova

    Zoran M. Štirbanović (2015-07-01)
    Rudarstvo, a u okviru njega i priprema mineralnih sirovina, se odlikuje složenošću tehnoloških procesa što je posledica velikog broja uticajnih parametara. Samim tim je potrebno biti veoma obazriv prilikom donošenja odluka u oblasti rudarstva. U cilju što efikasnijeg funkcionisanja procesa, moguće je primeniti različite metode koje služe za pojednostavljenje procesa odlučivanja. Jedna od takvih metoda jeste i teorija grubih skupova. Ona predstavlja relativno novu matematičku teoriju koja je pogodna za razumevanje nepreciznih i nepotpunih podataka kao i za otkrivanje ...
    rudarstvo, priprema mineralnih sirovina, teorija grubih skupova, višekriterijumsko odlučivanje, flotacijsko jalovište, flotacijski kolektor, flotaciona mašina
    ... Vol. 56, No. 3, 2006, pp. 165–183. 84. J. A. Caldwell, A. MacG Robertson, Selection of tailings impoundment sites, Die sivilie ingenieur in Suid Afrika, 1983, pp. 537-552. 85. A. MacG Robertson, A. S. Moss, Site selection and optimization studies for mill sites and tailings impoundments, Asian ...
    ... choosing flotation machine. The parameters that have the most influence during these three choices were determined, and they represented criteria for selection. The selected criteria were assigned with appropriate value, and subsequently the evaluation of the proposed subjects was carried out. In this way ...
    ... Support Systems 37, 2004, pp. 583– 597. 20. J. Wanga, A.-R. Hedar, S. Wang, J. Mac, Rough set and scatter search metaheuristic based feature selection for credit scoring, Expert Systems with Applications 39, 2012, pp. 6123–6128. 21. J.-W. Liu, C.-H. Cheng, Y.-H. Chen, T.-L. Chen, OWA rough set ...

  • Advantages and challenges in presenting mathematical content using EDX platform

    Marija Radojičić, Ivan Obradović, Ranka Stanković, Olivera Kitanović, Roberto Linzalone (2016)
    ... on by optimizing the deployment of institutional staff and budgets, and serving students in local languages. 5) Involving students in the selection and adaptation of OER in order to engage them more actively in the learning process. 6) Encouraging creation of new educational models. 7) ...

  • Business Models for Small-scale Biomass Projects Development

    Dejan Ivezić, Miodrag Gluščević, Marija Živković (2019)
    Biomass is recognized as the most promising renewable energy source in Serbia. The share of biomass in Serbian final energy consumption is over 10%, but mostly related to traditional use in stoves and ovens. One of the main obstacles for wider implementation of contemporary biomass facilities is the inexperience of consumers and stakeholders in the implementation of “innovative” business models, especially in the cases of small-scale projects. In this paper, three different business models (public utility company, energy cooperative ...
    ... knowledge for implementing this type of projects, which include the development of a complex techno-economic analysis, provision of funds, procurement of equipment, construction of facilities, organization of supply chains, financial monitoring and plant management. One of the solutions is that energy cooperative ...
    ... This is certainly not an innovative solution, but it would have to be considered as a common practice in Serbia ("business as usual") during the selection a business model. In the case of replacement of existing boiler in local school by woodchips boilers, technical staff of PUC “BB Term” would be in ...

  • Upotreba lidar tehnologije i digitalne fotogrametrije primenom iPhone pametnih telefona na primeru rudnika "Rudnik"

    Nikola Mirković, Luka Crnogorac, Aleksa Paunović (2024)

  • Influence of mono- and two-component organic modifiers on determination of lipophilicity of tetradentate Schiff bases

    Nikola Stevanović, Aleksandar Mijatović, Aleksandar Lolić, Mario Zlatović, Rada Baošić (2021)
    Ispitivani su uticaji primene mono- i dvokomponentnih organskih modifikatora na određivanje lipofilnosti 12 tetradentatnih Šifovih baza metodom reverzno-fazne tankoslojne hromatografije. Osnovni cilj je da se proceni tip interakcije između posmatranih jedinjenja i komponenti primenjenih hromatografskih sistema i uspostavi neki obrazac ponašanja kako bi se lakše izabrala kombinacija organskih modifikatora koji će simulirati interakciju u biološkim sistemima na osnovu činjenica da iste osnovne intermolekularne interakcije su odgovorne za ponašanje supstanci i u biološkom i u hromatografskom sistemu. Primenjeni organski modifikator ...
    Šifove baze, Lipofilnost, RP-TLC, Organski modifikatori

  • Long-term planning methodology for improving wood biomass utilization

    Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković (2019)
    The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...
    Long-term planning methodology, Forest biomass, MINLP, Backcasting

  • GIS Application Improvement with Multilingual Lexical and Terminological Resources

    Ranka Stanković, Ivan Obradović, Olivera Kitanović (2010)
    ... the most frequently used one. Templates for queries are defined in the geodatabase, but the user can update and insert new search definitions. Selection of words chosen for the query can be substantially improved by using lexical resources, morphological dictionaries and transducers in the first ...

  • Dimenzionisanje deponija za ugalj

    Dinko Knežević, Božo Kolonja, Ranka Stanković, Aleksandra Tomašević, Dragana Nišić (2014)
    ... quality control, www.doiserbia.nb.rs/img/doi/0354-9836/2013%20OnLine-First/ 0354- 98361300031S.pdf 8. Erasmus J. H., Bulk Raw Materials Storage Selection, www.beltcon.org.za/ docs/b1111.pdf 9. Kolonja B. i dr., 2008, Implementacija sistema za upravljanje kvalitetom uglja na površinskim kopovima ...

  • Development of A Business Intelligence Tool For Accident Analysis in Mines

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Uroš Pantelić (2015)
    ... Fifteenth International Symposium on Mine Planning and Equipment Selection, Vol. 1 (Cardu M, Ed), Torino, Italy, 20-22. September 2006, pp. 436-441. ISBN 88 901342 4 0 [11] Stanković, R., Obradović, I., Kitanović, O., Kolonja, Lj.: Towards a Mining Equipment Ontology. In Proceedings of the 12th International ...
    ... trimesters, years, or within a limited time period. This information enables preventive action with the aim of raising the level of protection equipment for body parts that are most frequently injured. Figure 3 Various OLAP presentations Row Labels - desna leva Total glava 13 5 3 21 lice ...

  • Indeksi kontrole održavanja i korišćenja rotornog bagera

    Jovana Mitrović, Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić (2023)
    Razvoj površinske eksploatacije se u velikom stepenu zasniva na svestranoj mehanizaciji rudarskih radova. Kako bi se zadovoljili potrebni kapaciteti, neophodna je primena savremene mehanizacije, velikih kapaciteta i pouzdanosti u radu. Naime, sa stepenom povećanja mehanizovanosti radova smanjuje se broj zaposlenih radnika, povećava produktivnost rada, smanjuju troškovi po jedinici proizvoda, a samim tim i povećava ekonomičnost površinske eksploatacije. Predmet istraživanja su rotorni bageri SRs 1200 koji predstavljaju samohodne mašine kontinuiranog dejstva namenjene za otkopavanje jalovine i korisne supstance na površinskim ...
    rudarstvo, rotorni bager, indeksi održavanja, indeksi korišćenja, TOPSIS

  • 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
    ... process is crucial for the overall effectiveness and efficiency of the implementation of open pit reclamation. In the process of planning, i.e. selection of the reclamation model on which all further planning activities depend, can be used various multi-criteria decision-making methods such as Promethee ...

  • Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite

    Philippe Colomban, Aleksandar Kremenović (2020)
    Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...
    asbestos, CMC, Corsica, fiber, pottery
    ... really as fibrous as amphibole asbestos [38]. The identification of blue and white asbestos in these archaeological potteries indicates that a selection of the best quality available has been made by the potter to optimize the mechanical behavior of the cooking wares. Important differences are ...
    ... identified in these archaeological asbestos-fiber-reinforced ceramic matrix composites, confirming the ethnological classification. It appears that a selection of the most appropriate asbestos fibers has been made by ancient potters. Obviously, the good mechanical strength due to the fiber reinforcement ...

  • 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

  • Application of geophysical and multispectral imagery data for predictive mapping of a complex geo-tectonic unit: a case study of the East Vardar Ophiolite Zone, North-Macedonia

    Filip Arnaut, Dragana Đurić, Uroš Đurić, Mileva Samardžić-Petrović, Igor Peshevski (2024)
    General Earth and Planetary Sciences
    ... disregarded. The present study yields feature selection tables through RF modeling, which are distinguished by two parameters: the mean decrease in node accuracy (MDNA) and the total increase in node purity (TINP). The results of the feature selection process 1.e., feature importance analysis ...
    ... training dataset class ratios in relation to a testing dataset characterized by significant class imbal- ance. The results suggest that the precise selection of a suitable class balance for the training dataset is a critical factor in achieving accurate ophiolite prediction with RF and KNN algorithms ...

  • Избор методе подземног откопавања на примеру лежишта бакра

    Mилош Глигорић (2024)
    Тема овог завршног рада је избор методе откопавања у подземном руднику бакра. Рад је подељен на четири поглавља. У првом поглављу дат је приказ општих података и геолошких карактеристика ширег подручја и лежишта. Детаљан опис отварања и припреме лежишта за откопавање представљен је у другом поглављу. У трећем поглављу дат је опис све три варијанте изабране методе за запуњавањем откопаног простора, са освртом на количину захваћене руде, трошковима експлоатације као и динамиком откопавања. Четврто поглавље представља нумерички пример где ...
    избор методе подземног откопавања, анализа ефективности, лежиште бакра, подземна експлоатација
    ... anmrepHaTHBa. IIpeMa ToMe, y pamy he Hajmpe OMrHM npukaa3aHa MeTOJLA 3a onpeljuBabe TexuHa KpHTepHjyMa Koja ce Ha3HBa MPSI (Modified Preference Selection Index) Meroma. HakoH rora OMhe omaMcaHa MerToJa 3a paHrHpaMbc anrepHaTHBa Koja ce Has3HBa MAPA (Magnitude of the Area for the Ranking of Alternatives) ...
    ... KpHTepuHjyMa H mpuHmama rpynmM OOJeEKTHBHMX MerTOJa. Baaupa ce Ha Omaroj MOJMH(ODHKamunjH TpanHIMOHaJIHcC H IHMPpOKO pacnmpocrpapeHe PSI (Preference Selection Index) MemTome. Ta MMHHHMMAaHHa MOJmMHM(ObMKamHja OJHOCH cc Ha eJMHHHCaM»y je)HOr KOpaKka H3 OpHrHHajHe PSI erojee. Ha raj HauHH, KoOHauHc BpeJHOCTH ...
    ... Gligorić, M., Gligorić, Z., Lutovac, S., Negovanović, M., Langović, Z., 2022. Novel hybrid MPSI-MARA decision-making model for support system selection in an underground mine. Systems, 10(6), 248. 5. IlpaBBJIHHK O TeXHHKHM HOpMaTHBHMAa 34 IIO)13eMHy eKCIInoaTanH]jy MeTaJIHUHHX H HeMeTaJIHUHHX ...

  • An Approach to Development of Bilingual Lexical Resources

    Stanković Ranka, Obradović Ivan, Trtovac Aleksandra (2012)
    ... synsets containing the selected term(s) will be displayed. There is also an “Advanced options” button that offers advanced settings, such as selection of categories in which synsets are to be sought. The “New synset” button allows privileged users to enter new synsets into Biblimir and establish ...

  • Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas

    Milanka Negovanović, Lazar Kričak, Stefan Milanović, Nikola Simić, Jelena Majstorović (2024)
    During construction of buildings in urban areas, sometimes there is a need to blast solid rock mass in the immediate vicinity of the surrounding buildings. In that case, the aim is not only to increase the efficiency of blasting, but also to reduce harmful effects of ground vibration induced by blasting. At the same time, it is very important to protect the buildings located in the safe zone from the blast site as well as remaining rock mass around ...
    expansive mortar, artificial screens, pressure, rock breaking, building foundation

  • A Knowledge-Based Approach to Mine Ventilation Planning in Yugoslav Mining Practice

    Nikola Lilić, Ivan Obradović, Ranka Stanković (2002)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper, we ...
    ... Lilic, R. Stanković and I. Obradović, Mine ventilation system planning using ge- netic algorithms, Proc. 6th Int. Symp. Mine Planning and Equipment Selection, 1997. 7. N. Lilić and I. Obradović, Computer-aided analysis of mine ventilation for emergency plans, 1st Regional APCOM SYMP, Bled Slovenia ...
    ... extent the various limitations imposed by current engineering practice. The existence of this possibility for obtaining alternative solutions in the selection of the most favorable one is very important especially in view of complex problems often posed by the engineering practice. Fig. 16. The user ...

  • 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

  • A business intelligence approach to mine safety management

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić (2016)
    ... Management Information System. in Proceedings of the Fifteenth International Symposium on Mine Planning and Equipment Selection, Torino, Italy. 2006. 8. Stanković, R.M., et al., Towards a mining equipment ontology. In Proceedings of the 12th International Conference "Research and Development in Mechanical ...
    ... trimesters, years, or within a specific time period. This information enables preventive action with the aim of raising the level of safety equipment for body parts that are most frequently injured. Figure 4. Representation of injuries by body part and body side Figure 5 shows the percentage ...
    ... occur in the middle of the working day (shift). The reason for this can be found in the carelessness of workers not wearing proper protective equipment as well as their failure to comply with work health and safety measures. Figure 6. The working hour combined with injured body part Data on ...