Претрага
919 items
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Spatial assessment of the areas sensitive to degradation in the rural area of the municipality Čukarica
Nature and Landscape Conservation, Soil Science, Agronomy and Crop Science, Water Science and TechnologyNatalija Momirović, Ratko Kadović, Veljko Perović, Miloš Marjanović, Aleksandar Baumgertel. "Spatial assessment of the areas sensitive to degradation in the rural area of the municipality Čukarica" in International Soil and Water Conservation Research, Elsevier BV (2019). https://doi.org/10.1016/j.iswcr.2018.12.004
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Daljinsko merenje temperature na bušotinskom cevovodu
Aleksa Petrović (2024)Ovaj diplomski rad analizira daljinsko merenje temperature na bušotinskim cevovodima, koje je od velike važnosti za kontrolu i nadzor nad industrijskim procesima posebno u ekstremnim uslovima kao što su visoke temperature i pritisci u bušotinama. Opisane su različite vrste temperaturnih senzora, kao što su termoparovi, bimetalni i otpornički termometri, kao i senzori na bazi optičkih vlakana, koji se primenjuju za kontinualno merenje temperature duž cevovoda u realnom vremenu. Daljinsko merenje temperature omogućava pravovremeno otkrivanje curenja i nepravilnosti, što je ...temperatura, daljinsko merenje temperature, bušotinski cevovodi, DTS sistemi, infracrveni senzori, bežične mreže... eaaaeeaaee e aaa e a aeaaa ttt aatieatke t || 2. TEMPERATURA a a aea e ee e aeeae a ea a ataaetaaatae i 2 2.1. Istorija merenja temperature ...l aaanaaaaaaaaa a aaaaaaitat i 2 2.2. Definicije temperature a anaaa a a a a e a aaaaNaaaaaaaaat i 3 2.3. Oznake i jedinice....aaaaaaaa e aa a ai a a ...
... ........ 20 BNPA.( 40 0ro/.( OOGGAORORIRORIRIRIRIRIORIGRORIGRIRGIGRIGGGGGGRIRIGRIRGRARRRARRRRRGRRRIRIRIRII 31 6. LITERATURA aR aaaaaana a a aaa e e a a akaaaa a aaaaaaat tt 32 Rezime Ovaj diplomski rad analizira daljinsko merenje temperature na bušotinskim cevovodima, koje Je od velike važnosti ...
... kontaktne metode merenja temperature spadaju: 1. Otpornički temperaturni senzori (RTD) . Termistori . Termoparovi . Bimetalni termometri r E O M . Manometarski termometri Beskontaktno merenje temperature odnosi se na metode merenja temperature tela na osnovu njihovog toplotnog ...Aleksa Petrović. Daljinsko merenje temperature na bušotinskom cevovodu, 2024
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Верификација I БТО система на површинском копу Дрмно
Дијана Младеновић (2024)У савременом рударству, површински копови угља наилазе на различите проблеме које треба превазићи зарад добијања потребне количине угља. Као највећи потрошачи овог енергента јављају се термоелектране, где на основу чега можемо да закључимо колико су блиско повезани добра и континуирана производња на површинском копу и рад термоелектрана. Са циљем да се обезбеди стабилна и континуирана производња, потребно је да се направи добар одабир транспортера. У овом раду, за потребе верификације затезне чврстоће траке и снаге погона транспортера, коришћен је програмски ...... Sn·eFd—Sn Sn·'(eP“ —1) Pv = Sn – Ss = Sn – — = = ___ — ek:a ek:a ii ek:a Sn a n Pv · el HaOCHOByŠ—e —)SS—W —>Sn—Smax—e,m7_1 rne cy: Py- ByuHa cHia, [kN] Ss – cana y cHJ1a3HOM Kpaky, [kN]e""% — pyunu (bakrop (raOe;a 3.) 0 — 0OHXBaTHH yrao TpaKe OKoO Oy0maa, [?] u — Koe(Q)HnujeHT Tpebba H3MeDby ...
... 4.949.750 4.950.250 7.522.530 7.522.580 7.522.606 T 4.956.190 4.956.240 |- 4.959.000 [r· =- 7120 e ILB 495 400 0 O R Z q OM T 49 52 00 0 l– O E T 49 48 00 0 j _ — — — } 3 49 50 00 0 T 7514000 Cauka 2.1. EKcnnoamauuoHo no;be 634 T 7516000 ...
... KHeepBHh, 2000). 25 3aBpurHu paji Pynapcko-reononiku (bakyrer JlujaHa MinaneHonuh P53/20 e) f) Cnuka 3.13.. Tuhoau 6y60we6a a), 6) uenuunu 6y0atbeau ca ayMeHoM o0/1ozow;, c), d) KepaMuuku 0yOtbeGu, e) pe6pacmuuenuunu 0y0atb, f) uenuunu 6y0atb. IIoBparHa craHMma ce Hajla3H Ha CyIIDOTHOM KPpajy ...Дијана Младеновић. Верификација I БТО система на површинском копу Дрмно, 2024
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Possibilities of retro-digitalized German-Serbian Mining Dictionary
U radu će biti prikazan opis procesa retrodigitalizacije dvojezičnog Nemačko-srpskog rudarskog rečnika iz 1923. godine čiji je autor rudarski inženjer Dragutin Stepanović (Степановић, 1923). Ovaj rečnik je zasnovan na skoro 4 000 leksičkih zapisa koji su prevodilački ekvivalenti ili uputnice. Umesto predgovora autor daje uvid u svoje pismo upućeno “Ministru šuma i rudnika” u kome piše o nameri da zabeleži reči koje se koriste u narodu kako bi izbegao upotrebu nemačkih reči. Iako broj odrednica nije toliko veliki, rečnik ...Biljana Lazić, Olivera Kitanović, Ivan Obradović. "Possibilities of retro-digitalized German-Serbian Mining Dictionary" in E-dictionaries and E-lexicography, Zagreb, 10-11 May 2019, Zagreb : Institut za hrvatski jezik i jezikoslovlje (2019)
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Using technology for knowledge transfer between academia and enterprises
Ivan Obradović, Ranka Stanković (2014)Ivan Obradović, Ranka Stanković. "Using technology for knowledge transfer between academia and enterprises" in Knowledge and Management Models for Sustainable Growth, Proc. of IFKAD 2014, 9th International Forum on Knowledge Asset Dynamics, 11-13 June 2013, Matera, Italy, Bari : IFKAD (2014)
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Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja
Hidraulični bageri primenjuju se u različitim oblastima privrede a najzastupljeniji su u građevinarstvu i rudarstvu. Na površinskim kopovima sa kontinualnim sistemima, klasifikuju kao pomoćna mehanizacija a na površinskim kopovima sa diskontinualnim sistemima, kao osnovna mehanizacija. Kako je u oba slučaja njihova primena neizostavna, važno je izvršiti adekvatnu analizu postojećih podataka, u cilju optimizacije izbora tipa hidrauličnog bagera u odnosu na uslove rada datog površinskog kopa. U radu su opisane različite višekriterijumske metode koje su korišćene za analizu hidrauličnih bagera. ...Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Filip Miletić, Ivan Janković. "Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja" in Tehnika, Centre for Evaluation in Education and Science (CEON/CEES) (2019). https://doi.org/10.5937/tehnika1903369D
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Maturation and isotopic changes of individual hydrocarbons in lignite lithotypes through diagenesis and early catagenesis
Ivan Kojić, Achim Bechtel, Reinhard Sachsenhofer, Dragana Životić, Ksenija Stojanović. "Maturation and isotopic changes of individual hydrocarbons in lignite lithotypes through diagenesis and early catagenesis" in 29th International Meeting on Ogranic Geochemistry, 1-6 September 2019, Gothenburg, Sweden , European Association of Organic Geochemists (2019)
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Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event
Barbara V. Radulović, Lubomir S. Metodiev, Neda Motchurova-Dekova, Platon Tchoumatchenco. "Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event" in Historical Biology (2023). https://doi.org/10.1080/08912963.2023.2190757
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The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector
Natural gas is used for the production of almost 20% of total energy today. The natural gas security of the Republic of Serbia is an urgent strategic, political and security issue. Serbia is one of the most vulnerable countries in Southeast Europe, because it only has one supply route. This study is a contribution to efforts to better understand the factors affecting energy security through the implementation of a new methodology based on the fuzzy–AHP synthesis model for measuring ...Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković. "The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector" in Symmetry, MDPI AG (2020). https://doi.org/10.3390/sym12060908
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Анализа рада гас лифта на нафтном пољу К
Тамара Бркан (2024)Анализа рада гас лифта укључује детаљну процену перформанси, идентификацију проблема, симулацију и моделирање, као и опримизацију и прилагођавање система. Циљ је осигурати да гас лифт функционише ефикасно уз повећање производње и уз што мање оперативне трошкове. У даљем тексту биће описана анализа рада гас лифта на нафтном пољу К, као и поређење најекономичнијег решења.... · [—1+ /81—80 . (Q )] [bar]; _GS 'HB—ow+Pwh . (6) L= T e [ml; TIpu ueMy je: P.- nexumnu npurucak, [bar]; Panh— npHrucak Ha ycraMa Oymroruaue, [bar]; Puyt— MepeHH nuHHaMHuku ripHTucak, [bar]; m3 Qomax— MaKCHMAaJIHa IpOH3BOJU4, [E] 21 LA 500 Hwt 1000 B 1500 Cauka 7.3 – Ynoc ...
... Ha(THMx OymroTHHa HIpH HpHMCHH MeXaHHUuKC MeTOJIe eKcImoaTanuje, TexHuka 2, crp 209-214 4. BROWN, K. E., 1984. 7he tehnology of Artificial Lift Metods 4, Petroleum Publishing Co Tusla 5. BROWN, K. E., 1980. 7he tehnology of Artificial Lift Metods 4. Petroleum Publishing Co Tusla 6. SCHLUMBERGER ...
... OTKpHJe Tpehu BeHTHI. I OpPbH BeHTHJI OCTaJe 33TBOpeH CBC JIOK Je erOB IIpHTHCcaK OTBapabba Behu oJt npurHcKa OTBapaba Hipyror BeHTHIIa. Ha c 3.4 E – perynarop, ropbH H JipyrH BEHTHJI Cy 34TBOpcHH CBC JIOK je rparHcak y Ke3HHTy MaMbH OJ npuTHcKa 3aTBapahba JIpyror BeHTHJIA. CBH BEHTHJIH 13 ...Тамара Бркан. Анализа рада гас лифта на нафтном пољу К, 2024
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A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)
Jelena Ratković, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin. "A hydrogeological model of the open-cast mine Tamnava - West Field (Kolubara Coal Basin, Serbia)" in Underground Mining Engineering no. 29, Belgrade : University of Belgrade - Faculty of mining and geology (2016): 43-54
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Аnaliza mogućnosti povećanja nagiba završne kosine površinskog kopa “Podbraćan”
Vladimir Čebašek, Veljko Rupar (2018)Eksploatacijom boksita iz ležišta "Podbraćan" formiran je površinski kop sa maksimalnom visinom zavšne kosine od 280 m. Redovnom kontrolom stabilnosti trenutnog stanja kosina površinskog kopa utvrđeno je da faktor sigurnosti iznosi Fs = 1.71 – 1.85, a što je ukazalo da postoji mogućnost povećanja nagiba kosine. U radu je prikazan postupak analize mogućnosti povećanja nagiba završne kosine površinskog kopa "Podbraćan".... PS 4 iS 2 ~ SS Yeb= \ ls SS ‘. [mt oa. ~ ot My PN / > . \\ Soa E & aes b i Mr q ml y, ~a\\ NS ae : « AAS \ way y ‘s (s , z 4 SN); f nt —~ , li y = - » 7 r | y, S. Oy Ww ~* (ZN ol uV o os Se \ y 7 < ~ | \E 6 ypmenca:IC wryaumona Kapa yep: D000 iCmawe: ———_B0.11.2017.. Apamoush ...
... statističkim proračunima Materijal Zapreminska težina (kN/m3) Čvrstoća na pritisak c (MPa) Čvrstoća na istezanje t (MPa) Modul elastičnosti E (MPa) Podinski krečnjaci 26.80 30.631 3.063 5700 Boksit 25.39 17.668 1.796 1550 Grupa neogenih sedimenata 23.98 5.24 0.600 236 Laporoviti ...
... fakultet, Beograd, pp. , (2007) 3. D.V. Griffiths, P.A. Lane, Slope stability analysis by finite elements, Geotechnique 49, No. 3, pp. 387-403, (1999) 4. E. Hoek, J.W. Bray, Rock slope stability, Revised Third Edition, Institution of Mining and Metallurgy, London, pp. 358, (1981) 5. D.C. Wyllie, C.W. Mah ...Vladimir Čebašek, Veljko Rupar. "Аnaliza mogućnosti povećanja nagiba završne kosine površinskog kopa “Podbraćan”" in Mining and Geology Today, II international symposium, Belgrade, 04 - 05.12.2018., Rudarski institut, Balkanska akademija nauka, Akademija inženjerskih nauka Srbije (2018). https://doi.org/10.25075/SI.2018.17
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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... Pre-Karst, Bosnian Flysch High Karst — Mh , Dalmatian zone\\ Ophiolites and accretionary prisms| - Eastern Vardar Op&utic Unit Sava zone e | Western Vardar Ophiolil 43582 phiolitic U Europe undifferen(iatš?%f;\š 40km Valjevo L449 -439 Kopaonik thrust sheet' 179 209 Fig. 1 Tectonic ...
... pattern similar to the map-scale structures. Inver- sion of fault-slip data (for methodology see Angelier 1984) implies roughly N-S compression and E-W extension for Dxy structures (Fig. 5). Du structures are map- and outcrop-scale normal faults that in some cases cut the Dxy strike-slip faults ...
... surfaces. d Subgrain formation and grain boundary migration of quartz during D, phase in thin section from outcrop 169 (Drina-Ivanjica Paleozoic). e Tight to isoclinal F, folds and related S, axial planar cleavage in the Northern Triassic unit at outcrop 198. f Thin section from the Southern Triassic ...Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor. "Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides" in Swiss Journal of Geosciences (2019)
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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... process. The schema for classifying background logs used in this study is shown in Figure 6.9. Specialist Standard cards „ S 5 5 B B B E B B B E B B E E -f. „O F Store cards V I V I I I I I ) Card visualization Label cards Discard cards Figure 6.9. Classification and manual selection ...
... o ' Li L “ [] LJ ? LI vromoe (%5e0C}) Figure 3.1 time functions of load and stroke of the smooth rod Š·o i E PR N a a m e .'! ” L A_'A––––Ev @llšsss·zlll B dı | | | oO e % 2 «0 bl · tod glatko Sipko S(cm) Figure 3.2 Dynamograms of downhole pump operation: a})load, b)surface, c)downhole ...
... is shown in Figure 6.7. 55 Approxirnation coefficients (low pas5) - LEVEL 1 Detail coefficients (high pas5) - LEVEL 1 [[] % CARD z{(A} []] i e e -25 F3 “ bj Low pass H igh pass |, 2 P . o Low pass High pass Figure 6.7. Application of DWT to a normalized dynamometric chart from a well ...Maja Trikić. Application of machine learning for diagnosing the operation of a deep well pump in oil production, 2024
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Determining the Impact of Cutting Elements State on the Bucket–Wheel Excavator Vibration and Energy Consumption
Background There are two types of specifc sizes’ measurements. The frst is the measurement of energy consumption in a working technological process, and the second is the measurement of vibration, which is displayed over amplitudes of speed. There is an interplay between these two processes. Increasing the power consumption, the value of the vibration speed amplitudes increases. Purpose The process of the determination of machining parameters was based on minimizing the power consumption and vibration of the cutting tool, ...Filip Miletić, Predrag Jovančić, Miloš Milovančević, Miloš Tanasijević, Stevan Đenadić. "Determining the Impact of Cutting Elements State on the Bucket–Wheel Excavator Vibration and Energy Consumption" in Journal of Vibration Engineering & Technologies, Springer (2022). https://doi.org/10.1007/s42417-022-00482-3
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Anthropogenic impact on the groundwater regime: Case study of the Velika Morava alluvium
Jovana Mladenović, Vesna Ristić Vakanjac, Milan Kresojević, Boris Vakanjac, Jugoslav Nikolić, Dušan Polomčić, Dragoljub Bajić (2023)The Velika Morava River originates at the junction of the Južna Morava and Zapadna Morava at the town of Stalać in Serbia. It is 185 km long and empties into the Danube. The Velika Morava River Basin occupies a land area of 37 444 km2. The river flows through central Serbia, which features the most fertile land and the highest population density in the country. Public water supply in this region of Serbia relies on groundwater formed in alluvial ...Jovana Mladenović, Vesna Ristić Vakanjac, Milan Kresojević, Boris Vakanjac, Jugoslav Nikolić, Dušan Polomčić, Dragoljub Bajić. "Anthropogenic impact on the groundwater regime: Case study of the Velika Morava alluvium" in Review of the Bulgarian Geological Society, Bulgarian Geological Society (2023). https://doi.org/10.52215/rev.bgs.2023.84.3.295
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Ograničenja primene optimizacionih algoritama u slučaju kopova
Proces optimizacije površinskih kopova, kao sastavni deo strateškog planiranja, veoma je važan sa stanovišta ostvarivanja maksimalnih efekata proizvodnje. To je složen zadatak koji vrlo često podleže vrlo strogim geometrijskim i drugim praktičnim rudarskim ograničenjima. Ova ograničenja u posebno su izražena na površinskim kopovima uglja, te u značajnoj meri mogu povećati stepen neizvesnosti rudarskog projekta, odnosno izazvati neželjena dejstva u pogledu profitabilnosti poslovanja. Iz tog razloga, veoma je važna primena savremenih optimizacionih alata, koji u značajnoj meri mogu olakšati celokupan ...... Krovina Goryag ____Seam BE2 SeamDEI & |- upijerog Moja ieam 66 ? Seambi š | eamsB ka 6 š Fi Seam G4 Š šeamDO? r Pi Seam BAž d e -1 5 Seam P š 453 | : Seam6ž ž a Gž4 žemst E e Porina donjeć, Seamc' - -}1 ugenog sloja _— m 1 BROOMNSAA GUNA Slika 4. Karakterističan geološki profil i stratigrafska sekvenca ...
... gornju i donju granicu vrednosti koja može biti postignuta u praksi (C. Wharton, 2000). BOO 125 — 700 š = i00 600 m i 5 F-} s E 7 š 400 a s |_ e 50 300 | -1 || -i ' i 200 % > |. 25 ·š aooS * |LJ 5 10 • Generisane konture L_ -25 —— Vrednost kopa - najbolj slučaj |___] ...
... odmah nakon Poljske (IEA, 2018. god). Udeo uglja u proizvodji električne energije za pojedine evropske zemlje SRBIJA (64.1 %) I 10 i , % , , ., a e , , , , d, %, , , , QM . Slika 1. Procentualno učešće uglja u proizvodnji električne energije S obzirom na značaj površinskih kopova uglja, proces ...Dejan Stevanović, Mirjana Banković, Milica Pešić Georgiadis, Petar Marković, Dejan Ranković. "Ograničenja primene optimizacionih algoritama u slučaju kopova" in XIV Međunarodna konferencija OMC 2020, Zlatibor, Srbija, 14-17. oktobar 2020., Beograd : Jugoslovenski komitet za površinsku eksploataciju (2020)
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Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software
The development of modern technologies has enabled the application of specialized softwares in the field of mining through various segments and processes, including in works related to drilling and blasting. The application of specialized software for drilling and blasting with the use of modern technologies such as photogrammetry enabled more accurate data from the field for later processing. By processing data and creating a 3D model of the terrain for drilling and blasting works, it can obtain precise data, ...Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić. "Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software" in Podzemni radovi, Beograd : Rudarsko-geološki fakultet (2024)
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A Model for Determining Fuzzy Evaluations of Partial Indicators of Availability for High-Capacity Continuous Systems at Coal Open Pits Using a Neuro-Fuzzy Inference System
This paper presents a model for determining fuzzy evaluations of partial indicators of the availability of continuous systems at coal open pits using a neuro-fuzzy inference system. The system itself is a combination of fuzzy logic and artificial neural networks. The system availability is divided into partial indicators. By combining the fuzzy logic and artificial neural networks, a model is obtained that has the ability to learn and uses expert judgment for that learning. This paper deals with the ...системи, континуални системи експлоатације (роторни багер-транспортер-дробилично постројење), рударство, расположивост, меко рачунарство, фази логика, ANN, ANFISMiljan Gomilanović, Miloš Tanasijević, Saša Stepanović, Filip Miletić. "A Model for Determining Fuzzy Evaluations of Partial Indicators of Availability for High-Capacity Continuous Systems at Coal Open Pits Using a Neuro-Fuzzy Inference System" in Energies, MDPI AG (2023). https://doi.org/10.3390/en16072958
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Analiza toplotne moći i Vobeovog indeksa prirodnog gasa različitog porekla
Lana Mitrović (2024)U radu su prikazane najznačajnije osobine prirodnog gasa, uključujući hemijski sastav, jednačine sagorevanja i termodinamičke karakteristike koje predstavljaju osnovu za dalje razumevanje rada. Prikazane su količine prirodnog gasa na evropskom trţištu prema zemlji porekla, kao i njihove zasebne hemijske i termodinamičke karakteristike.Kvalitet prirodnog gasa u Republici Srbiji je posebno poglavlje u radu u okviru kog je detaljnjije opisano snabdevanje Republike Srbije prirodnom gasom, kao i zahtevani kvalitet.Na kraju, obuhvatajući sve prethodno navedeno, prikazan je postupak rešavanja Studije slučaja koja ...Lana Mitrović . Analiza toplotne moći i Vobeovog indeksa prirodnog gasa različitog porekla, 2024