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654 items
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Geotehnički uslovi izgradnje nadvožnjaka "Balajnac" na autoputu E-80 deonica: Niš - Merošina
Dragoslav Rakić, Nikola Božović (2024)U sklopu prve deonice autoputa E-80 Niš – Merošina, izgrađen je nadvožnjak u zoni sela Balajnac koji je oslonjen na tri stubna mesta na međusobnom rastojanju od oko 26 m. Svaki stub je fundiran na šipovima i to sa predloženim rasporedom od 2 šipa u grupi na međusobnom rastojanju od 3.6 m. U radu su na osnovu izvršenih geotehničkih istraživanja terena, analizirani rezultati nosivosti vertikalno opterećenog šipa prečnika 1.2 m i dužine šipa od L = 23 m. Analiza ...Dragoslav Rakić, Nikola Božović. "Geotehnički uslovi izgradnje nadvožnjaka "Balajnac" na autoputu E-80 deonica: Niš - Merošina" in Peti Srpski kongres o putevima, Beograd, 30-31.05.2024., Beograd : Srpsko društvo za puteve "Via Vita" (2024)
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P-T analiza uglja RB Kolubara
Rada Vitomir (2024)Rudarski basen Kolubara predstavlja jedno od najvažnijih ležišta lignita u Republici Srbiji i ključni je faktor u snabdevanju zemlje energijom. Kvalitet uglja iz ovog basena direktno utiče na efikasnost termoelektrana i zadovoljenje energetskih potreba. U ovom radu, opisan je značaj tehničke i elementarne analiza uglja kako bi se utvrdili fizičko-hemijski parametri uglja iz Rudarskog basena Kolubara. U drugom delu rada dat je opis P-T analize uglja i njen značaj za ocenu mogućnosti čišćenja uglja. Takođe, dati su i rezultati ...... 7-14% relativno lako, ugljevi međuproiuzvodom od 14-21% se teško čiste a ugljevi sa udelom međuproizvoda preko 21% su nesposobni za čišćenje. g S B B B N G T M ~“ e UGALJ A UGAU SE LAKO ČISTI. [] . 20 bJ “ L : 08 % [ [. %0 0 D O M Q % O M MO % W P UGAU D UGALJ SE ...
... prste, crn je ı bez sjaja b) jako ispucan, metalni zvuk, ne prlja prste, siv Je ili crn sa slabim sjajem III — zadržava početnu zapreminu uzorka, čvrst, dobro stopljen i sa izraženim metalnim zvukom IV - povećana početna zapremina uzorka : a) slabo naduven b) umereno naduven c) jako naduven ...
... Specifična težima Pojedine frakcije Frakcije koje plivaju Frakcije koje tomu PRRREE? Tk TEO pt - Tipt . NE NE . M ME KK KE K— plive 1,,} Lž J,B b,75 208,05 208,05 ,8 ,75 2008,50 100,0 20,08 .00 20,0 20,0 7,95 159,00 | 367,9% «63,8 - 5,7 1800,8% | 56,2 32,03 ., - 1,5 10,0 10,0 15,68 156,00 ...Rada Vitomir. P-T analiza uglja RB Kolubara, 2024
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Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia
Dušan Polomčić, Bojan Hajdin, Zoran Stevanović, Dragoljub Bajić, Katarina Hajdin. "Groundwater management by riverbank filtration and an infiltration channel, the case of Obrenovac, Serbia" in Hydrogeology Journal, Berlin, Heidelberg : Springer, International Association of Hydrogeologists (2013). https://doi.org/10.1007/s10040-013-1025-9
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Determination of Mechanical Properties of Altered Dacite by Laboratory Methods
This paper presents a methodology for determining the uniaxial and triaxial compressive strength of heterogeneous material composed of dacite (D) and altered dacite (AD). A zone of gradual transition from altered dacite to dacite was observed in the rock mass. The mechanical properties of the rock material in that zone were determined by laboratory tests of composite samples that consisted of rock material discs. However, the functional dependence on the strength parameter alteration of the rock material (UCS, intact ...... tics of quartz and biotite. Figure 2. Analyzed open pit slope consisting of dacite with microscopic images of the material: (a) altered dacite and (b) dacite. Exploration works were based primarily on exploratory drilling, geological mapping, and laboratory tests. During these studies, four boreholes ...
... in the present study. Minerals 2021, 11, 813 5 of 19 Figure 3. Procedure for preparation of specimen for laboratory tests: (a) drilling process, (b) cutting process. Figure 4. Scheme of tested samples preparation. The dimensions of the specimens used in the UCS test differ depending on the recom- ...
... and 30 specimens for triaxial tests (Figure 5). Minerals 2021, 11, 813 6 of 19 Figure 5. Composite specimens prepared for testing: (a) UCS, and (b) triaxial test. Nevertheless, UCS tests were performed on a hydraulic compression testing frame with sufficient pressure capacity and capable of applying ...Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola Živanović. "Determination of Mechanical Properties of Altered Dacite by Laboratory Methods" in Minerals, MDPI AG (2021). https://doi.org/10.3390/min11080813
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Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)
Filip Abramović, Miroslav Popović, Vladimir Simić, Vesna Matović, Radmila Šerović. "Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)" in Materials, MDPI AG (2024). https://doi.org/10.3390/ma17040820
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Trans-Lithospheric Diapirism as a Possible Mechanism for Ophiolite Emplacement?
Nikola Stanković, Taras Gerya, Vladica Cvetković, Vesna Cvetkov. "Trans-Lithospheric Diapirism as a Possible Mechanism for Ophiolite Emplacement?" in EGU General Assembly 2024, Vienna, 14-19 April 2024, Göttingen : Copernicus GmbH (2024). https://doi.org/10.5194/egusphere-egu24-568
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A business intelligence approach to mine safety management
Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić (2016)... the first cube (a) injuries are categorized according to the type of injury and the quarter of the year in which it happened. For the second cube (b), the measures taken into consideration are the type of injury, the day in the week on which it happened and the age of the injured worker. Based ...
... dimensions to be used for calculating the number of injuries can be defined in a quick and simple manner. 13th ISCSM 2016 BELGRADE 6 (a) (b) Figure 3. OLAP cubes The BI model can offer important information for safety management but also allows different ways of presenting data. Figure ...
... Ontology-based modeling and inference for occupational risk prevention. Proceedings of Advances in Semantic Processing, 2010: p. 205-211. 7. Kolonja, B., et al. An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System. in Proceedings of the Fifteenth International ...Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić . "A business intelligence approach to mine safety management" in 13th International Symposium Continuous Surface Mining, Beograd : Yugoslav Opencast Mining Committee (2016)
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Approach to operational mine planning: Case study Tamnava West
... 1275 427 / 4 7032 6657 DD 3.04 7495 / 3642 G20 0.33 3463 596 / DD2 1.56 7421 / 1877 G18 0.27 1452 490 / G18 1.0 1452 1800 / 5 1800 3752 b) Mining block (# 20/51) divided on a BWE cuts with basic quantity and quality parameters for each cut Figure 9. Mining block divided in excavator’s ...
... 2011-2014. REFERENCES 1 International energy outlook 2011, US Energy Information administration 2 Ignjatović D., Knežević D., Kolonja B., Lilić N., Stanković R, 2007, Upravljanje kvalitetom uglja ("Coal quality management"), University of Belgrade, Faculty of mining and geology, ...
... blending piles, Fourth World Conference on Sampling & Blending, The Southern African Institute of Mining and Metallurgy 7 Stevanović D, Kolonja B, Stanković R, Knežević D, Banković M, 2013, Application of stochastic models for mine planning and coal quality control, 2013, Thermal Science ...Dejan Stevanović, Mirjana Banković, Milica Pešić Georgiadis, Ranka Stanković. "Approach to operational mine planning: Case study Tamnava West" in Tehnika, Beograd : Savez inženjera i tehničara Srbije (2014). https://doi.org/10.5937/tehnika1406952S
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Characterization of Natural Clay from Bogovina (Serbia) and Possible Utilization in Sorption of the Herbicides
Lazar Kaluđerović, Zorica Tomić, Rada Đurović-Pejčev, Maja Milošević. "Characterization of Natural Clay from Bogovina (Serbia) and Possible Utilization in Sorption of the Herbicides" in Eurosoil2020, online event 2021, Eurosoil, Frontiers Abstract Book (2021)
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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).... količine iz B biće pomereno za mesec dana unapred. Ako je diskontna stopa 1% mesečno, NPV za količine rude B biće povećan za 1%. Tako imamo smanjenje NPV zbog smanjenog novčanog toka iz dela A i povećanja NPV zbog uvećanog novčanog toka iz B, koji se otkopava ranije. Ako je prirast NPV iz B veliki u poređenju ...
... tokovi novca u današnjim dolarima. Međutim, razmatraju se dva različita načina eksploatacije prvog miliona tona, i to: Scenario A i Scenario B. Ako Scenario B traje šest meseci duže nego Scenario A, onda, i pored toga što ima drugačiji novčani tok od A, to će odložiti sve novčane tokove generisane e ...
... skokova u kapacitetu otkopavanja, (Wharton, 2000). A) Najbolji slučaj 125 B) Najgori slučaj Slika 3.36. Godišnja proizvodnja rudnika, (Wharton, 2000) A) NPV mod 126 B) Režim balansiranja Slika 3.37. Milawa algoritam, (Wharton, 2000) Milawa algoritam koji radi ...Daniel P. Kržanović. "Model za optimizaciju graničnog saržaja metala u rudi u funkciji dugoročnog planiranja površinskih kopova" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-06-14)
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Mikrobiološki diverzitet kiselog jezera Robule i uticaj jezerske vode na oksidaciju sulfidnih minerala
Srđan B. Stanković (2016-09-11)Jezero Robule, formirano u podnožju rudničke raskrivke Oštreljski planir (Rudnik bakra Bor), je nastalo kao posledica rudarskih aktivnosti. Mikrobiološki diverzitet ekstremno kiselog jezera Robule ispitivan je primenom kako klasičnih mikrobioloških metoda (svetlosna mikroskopija i kultivacija na selektivnim podlogama) tako i primenom savremene metode molekularne biologije (analiza polimorfizama terminalnih restrikcionih fragmenata; T-RFLP). Takođe, ispitivan je i potencijal i efikasnost jezerske vode u biološkom luženju mineralnog koncentrata, kao i u bioluženju uzoraka stare flotacijske jalovine Rudnika bakra Bor.Na osnovu dobijenih rezultata ...... Srđan B. Stanković MIKROBIOLOŠKI DIVERZITET KISELOG JEZERA ROBULE I UTICAJ JEZERSKE VODE NA OKSIDACIJU SULFIDNIH MINERALA Doktorska disertacija Beograd, 2016. UNIVERSITY OF BELGRADE FACULTY OF MINING AND GEOLOGY Srđan B. Stanković MICROBIAL ...
... formira vrsta Leptospirillum ferrooxidans. B) Krupnije kolonije gvožđe-oksidujućih bakterija na FeYeo podlozi. C) Kolonije heterotrofnih acidofila na Yeo podlozi. 74 Slika 26. A) Mikroskopska fotografija končaste alge izolovane iz biomase. B) Mikroskopska fotografija kolonija het ...
... Sanchez-Espana J. and Johnson D. B. (2013) New insights into the biogeochemistry of extremely acidic environments revealed by a combined cultivation-based and culture-independent study of two stratified pit lakes, FEMS Microbiology Ecology 87: 237-243 115 33. Fu B., Zhou H., Zhang R., Qiu G ...Srđan B. Stanković. "Mikrobiološki diverzitet kiselog jezera Robule i uticaj jezerske vode na oksidaciju sulfidnih minerala" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-09-11)
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Analiza primenjenih metoda za transport parafinske nafte
Dunja Milojević (2024)Sadržaj parafina u nafti ima dominantan uticaj na svojstva parafinskih nafti. Taloženje parafina, odnosno taloženje čvrstih čestica parafinskog voska, predstavlja ozbiljan globalni problem tokom proizvodnje i transporta sirove nafte. Samo taloženje voska zavisi od termodinamičkih faktora, poput temperature, pritiska i sastava nafte. Transport nafte cevovodima je uobičajeni proces transporta u naftnoj industriji. Kada prilikom cevovodnog transporta parafinske sirove nafte, dođe do prekida protoka i hlađenja nafte ispod temperature stinjavanja, parafini će kristalisati, pri čemu će doći do, geliranja celokupne transportovane ...... Production And Transportation. SPE Production & Facilities, 10(1), 50-54. 15.Prstojević, B. (2012). Cevovodni transport nafte i gasa. Beograd: Univerzitet u Beogradu, Rudarsko-geološki fakultet. 16.Prstojević, B. (2012). Priprema nafte, gasa i ležišnih voda. Beograd: Univerzitet u Beogradu, Ruda ...
... transporta. lako manje efikasni u poređenju sa drugim metodama prema obimu i kapacitetu, prednost kamiona leži u lakoći manevrisanja od tačke A do tačke B. (Abdel-Aal, 2021) Slika 3.7 - Cisterne (iStock) 15 4. PREDNOSTI CEVOVODA, I RIZICI KOJIMA SU ONI IZLOŽENI Stvarni potencijal ovih cevovoda ...
... Nedostatak ovog rešenja je da se naftovod ne može čistiti čistačem. (Prstojević, Cevovodni transport nafte ı gasa, 2012) Kod drugog rešenja, pod „b“, nafta protiče kroz unutrašnju cev, a grejni fluid, vruća voda ili para, protiče kroz prstenasti prostor. Prednost ovih tehničkih rešenja Je što ...Dunja Milojević. Analiza primenjenih metoda za transport parafinske nafte, 2024
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Production of morphological dictionaries of multi-word units using a multipurpose tool
The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...electronic dictionary, Serbian, morphology, inflection, multi-word units, noun phrases, query expansion... subsections IV-B and IV-C, the evaluation results were classified as follows: Fig. 6. Results obtained on the first set of test data (in%) a) If the system produced the correct lemma and assigned the correct inflectional class for a given MWU the overall solution was considered as correct; b) If the ...
... belonging to a particular inflectional class, and on the other, we identified inflectional classes associated with the same additional information. B. The rule design strategy The procedure for automatic construction of a DELAC type dictionary relies on a manually produced set of rules. The rule ...
... figure shows the percent of correct solutions for nouns and adjectives produced by the system (case a), the percent of partly correct solutions (case b), and the percent of incorrect solutions (case c). The bottom part of Fig. 6 illustrates the rank of the correct solution in the case of nouns, expressed ...Ranka Stanković, Ivan Obradović, Cvetana Krstev, Duško Vitas. "Production of morphological dictionaries of multi-word units using a multipurpose tool" in Proceedings of the Computational Linguistics-Applications Conference, October 2011, Jachranka, Poland, Jachranka, Poland : PTI - Polish Information Processing Society (2011)
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Laboratory testing of fly ash
Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction... Figure 2 The X-ray diagram of the sample, which is exposed for 7 days in a humid environment with the addition of lime binders: a) 6 %, b) 4 %, c) 2 % M. Šešlija i dr. ...
... (Fig. 3a, 3b, 3c). Figure 3 The X-ray diagram of the sample exposed to 7 days in a humid environment with the addition of cement binder: a) 6%, b) 4%, c) 2% 3.2.4 The sample exposed for 28 days in a humid environment without the addition of binders (TA-P-28) A sample of the mixture of ...
... Figure 5 The X-ray diagram of the sample, which is exposed for 28 days in a humid environment with the addition of lime binders: a) 6 %, b) 4 %, c) 2 % Laboratory testings of fly ash ...Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić. "Laboratory testing of fly ash" in Tehnički vijesnik (2016). https://doi.org/10.17559/TV-20150317171035
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An intelligent hybrid system for surface coal mine safety analysis
Nikola Lilić, Ivan Obradović, Aleksandar Cvjetić. "An intelligent hybrid system for surface coal mine safety analysis" in Engineering Applications of Artificial Intelligence (2010)
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Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example
Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, Irena Georgievska. "Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example" in Understanding and Reducing Landslide Disaster Risk, Springer International Publishing (2020). https://doi.org/10.1007/978-3-030-60227-7_29
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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)... GENERATION IN SERBIA by Jana S. STOJKOVI] a*, Goran H. MARINKOVI] b, Petar J. PAPI] a, Mihailo G. MILIVOJEVI] a, Maja M. TODOROVI] a, and Marina D. ]UK a a University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia b Geological Survey of Serbia, Belgrade, Serbia Original scientific paper ...
... pp. 947 -953 [7] Fournier, R., Chemical Geothermometers and Mixing Models for Geothermal Systems, Geothermics, 5 (1977), 1-4, pp. 41-50 [8] Hitchon, B., et al., Introduction to Ground Water Geochemistry, Geoscience Publish. Ltd, Edmonton, Al- berta, Canada, 1999 [9] Giggenbach, W., et al., Geothermal ...Jana Stojković, Goran Marinković, Petar Papić, Mihailo Milivojević, Maja Todorović, Marina Ćuk. "The analysis of the geothermal energy capacity for power generation in Serbia" in Thermal Science, National Library of Serbia (2013). https://doi.org/10.2298/TSCI120215033S
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WS4LR - a Worksation for Lexical Resources
... further used in a number of software tools for wordnet management, such as VidDic (Horák, 2004). The underlying XML format is illustrated in Appendix B. 2.3 Aligned Texts A pair of semantically equivalent texts in different langauges, such as an original text and its translation, that are and aligned ...
... synset literals only, without their inflected forms. We plan to include these forms in the search as well. 6. Bibliographical References Courtois, B. & Silberztein, M. (eds.) (1990) Dictionnaires électroniques du français, Langue française 87, Paris: Larousse Fellbaum, C. (ed.) (1998) WordNet: ...
... redovni profesor .NC_AXN+N+Comp:mp4v redovni profesor,redovni profesor .NC_AXN+N+Comp:ms1v redovnih profesora,redovni profesor .NC_AXN+N+Comp:mp2v B. Wordnet FormatENG20-11902751-n n pear 2 Cvetana Krstev, Ranka Stanković, Duško Vitas, Ivan Obradović. "WS4LR - a Worksation for Lexical Resources" in Proceedings of the Fifth Interantional Conference on Language Resources and Evaluation, Genoa, Italy, May 2006, ELRA - European Language Resources Association (2006)
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Investigation of quantitative indicators of anisotropy based on longitudinal elastic waves propagation velocities with uncertainty
... sample are representing deformation propagation, so depending of type of deformations, waves of different types can be caused: a) longitudinal waves b) transversal waves Today, ultrasonic waves with frequency over 20 000 Hz are applied in elastic properties investigations of different materials, ...
... „Podzemna eksploatacija mineralnih sirovina 2017“, Beograd. Beograd: Univerzitet u Beogradu – Rudarsko – geološki fakultet. JASIEHKO J. and STAWISKI B. (2001) Analysis of cracking plane geometry in old sandstone columns. Materials and Structures, 34, pp. 248–252. KAHRAMAN S. (2007) The correlations ...
... well log on the Norwegian Continental shelf. Thesis (MSc), Faculty of Mathematics and Natural Sciences, University of Oslo MOORE R. E., KEARFOTT R. B. and CLOUD M. J. (2009) Introduction to interval analysis. Philadelphia: Society for Industrial and Applied Mathematics. MYRIN M. and MALAGA K. (2006) ...Miloš Gligorić, Jelena Majstorović, Suzana Lutovac. "Investigation of quantitative indicators of anisotropy based on longitudinal elastic waves propagation velocities with uncertainty" in Underground Mining Engineering, Belgrade : University of Belgrade - Faculty of Mining and Geology (2018). https://doi.org/10.5937/PodRad1832001G
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Adaptive neuro-fuzzy prediction of operation of the bucket wheel drive based on wear of cutting elements
The capacity of the rotor excavator depends largely on the operation of the subsystem for digging. There is a great contribution to the correct and sharp teeth when the capacity is the highest. In the function of time, the teeth become clogged due to abrasive wear, or changes in their geometric shape. To analyze the bucket wheel drive in depend on wear of the cutting elements in this study adaptive neuro fuzzy inference system (ANFIS) approach was implemented. ANFIS ...Filip Miletić, Predrag D. Jovančić, Milos Milovančević, Dragan Ignjatović. "Adaptive neuro-fuzzy prediction of operation of the bucket wheel drive based on wear of cutting elements" in Advances in Engineering Software, Elsevier BV (2020). https://doi.org/10.1016/j.advengsoft.2020.102824