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Упит dcterms_subject_txt:road design

307 items

  • The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers

    Dragan Ignjatović, Predrag Jovančić, Stevan Đenadić, Ivan Janković, Ivica Ristović (2019)
    One of the most important prerequisites for the successful operation of the open-cast lignite mine is to carry out all the auxiliary works timely with the necessary quality. The most important and most commonly used auxiliary machines are bulldozers. Engaging time of bulldozers use is in direct relation with the coefficients of the time and capacity utilization of the continuous system for the excavation of coal and tailings, which indicates their importance. More than 100 bulldozers have been hired ...
    open-cast coal mine, auxiliary works, bulldozers, optimization, availability
    ... machine completely or partially loses operating capability and it is unable to meet the task requirements and function, as established by the machine design and specifications. One of the most important reliability indicators is failure frequency, i.e. expected number of failures in certain time interval ...

  • Одређивање оптималне производње дубинске пумпе на клипним шипкама

    Небојша Савић (2024)
    Дужи временски период током историје производње нафте, дубинске пумпе на клипним шипкама су први и у многим случајевима једини избор када су у питању механичке методе експлоатације. Правилан одабир сваког појединачног елемента система омогућава оптимизацију која са собом повлачи бенефите у виду повећавања ефикасности и смањења трошкова. Тренутно примењени систем дубинских пумпи на клипним шипкама на лежишту „Н“ обезбеђује стабилну производњу и реализацију годишњих планова производње без већих проблема. У овом раду је приказан начин оптимизације производње дубинским пумпама ...
    дубинска пумпа, оптимизација, производња, потисни вентил
    ... and plunger calculations“ — IIpHKa3aHO OueKHBaHO HcTe3aHbC TyOHHra, OueKHBaHH XOJI KiJiHra, IpenopyueHa JUy)KHHa KJIHITA H ITyMIIC. „Rod string design“ — /leraxbaH HpHKa3 HOTpeOHec KOJIHUHHC KJIHIHHX IHMHIIKM, H3pa)KeHO y MeTpHMA, orrepehebe cBaKe IHHIIKe Ha Kpajy HH3a. Compony:NaSs WellNN-16 ...
    ... Pump type iosert Pump efficiency/fdlaqe | 41%/95% | Fiecommended plunaor lenqth (m)- 5 Plunqer size (mm) 38 1 Pumop fnction (N)- 890 Rod string design Rod string stress analysis (service factor: 0.9) Diameter (mm) | __RodGrado # Guides/Rod 222 TEND Alov o >»>22 TEND Alov 3 191 TEND Allv 3 191 ...
    ... {m). 49 Pumo type- insert Pumo vol, efficiency: 72% Recorenended plunqer lenqth (m) 8 Plunqer size (memn) 38 1 Puro frictvon (N}: 890 Rod string design Rod string stress analysis (service factor: 0.9) Diameter (mm) RodGradoe LW M Tenm. | Fnc, | Svwess | TopMaximum | Top Minimum | Bot Minimmum # Guides/Rod ...

  • Projecting short to medium-term effects of carbon emissions trading on Serbia's GDP

    Boban Pavlović, Nikola Trtica (2024)
    This paper presents an approach to assess the short to medium-term effects of the Emissions Trading System (ETS), an economic and climate policy instrument aimed at reducing greenhouse gas emissions, on GDP from the expenditure side. The analysis focuses on Serbia’s electricity sector, which relies heavily on lignite-based pro duction dominated by state-owned enterprises. The obtained projections suggest that in the short term, the introduction of an ETS may lead to slower GDP growth compared to official forecasts. However, ...
    ETS, BDP - rashodni pristup, cene električne energije
    ... various scenarios. The second section of this paper presents background information on the Serbian economy and energy system, methodology, and the design of scenarios. The third section presents the results and discusses the results obtained. Conclusions are summarized in the final section. 2. ...
    ... the official projections shown in Fig. 2. The model was calibrated in accordance with existing macroeconomic trends and GDP projections. 2.3. Design of scenarios and data employed In this case study, three policy scenarios for introducing the ETS from 2023 to 2030 are examined. These three pathways ...
    ... Energy Pol. 75, 46–56. https://doi.org/10.1016/j. enpol.2014.07.021. Li, K., Qi, S.Z., Yan, Y.X., Zhang, X.L., 2022. China's ETS pilots: program design, industry risk, and long-term investment. Adv. Clim. Change Res. 13 (1), 82–96. https://doi. org/10.1016/j.accre.2021.11.002. Li, M., Weng, Y. ...

  • Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining

    Vladimir Čebašek, Veljko Rupar, Stevan Đenadić, Filip Miletić (2021)
    Geology,Geotechnical Engineering and Engineering Geology
    ... in high-volume mining operations for decades. These excavators offer some advantages as compared to the standard mining equipment [1]. The excavator design must reflect specific conditions to realize these advantages and make bucket-wheel dredge operation efficient. Additionally, a sufficient digging force ...
    ... in high-volume mining operations for decades. These excavators offer some advantages as compared to the standard mining equipment [1]. The excavator design must reflect specific conditions to realize these advantages and make bucket-wheel dredge operation efficient. Additionally, a sufficient digging force ...

  • BEYOND 2020 - Geology explorations and open pit activities affectation in reclamation designing in Kolubara Coal Mines (KCM) Serbia, new considerations

    Bojan Dimitrijević, Bogoljub Vučković, Radmila Gaćina (2023)
    Geology explorations in KCM runs from 1936. year up to these days and still ongoing. Results in >7,200 drill holes with ≈600,000 m of core drilling and gave lignite ore resources of > 4,1Bt, which 1,15Bt are excavated since 1986. of XIX up to early years of XXI century. For further mining operations in open pits stay 1,5Bt of lignite. Under waste heaps are ≈80 km2, additional 85 km2 should be filled. All of that masses/areas were, are ...

  • Development Of The Serbian Geological Resources Portal

    Ranka Stanković, Jelena Prodanović, Olivera Kitanović, Velizar Nikolić (2011)
    ... the geological database, we realised that certain data, which by their content and structure did not cor- respond to the initial geological database design, could still be interesting to the expert public. Because of this, the development of the portal for geological resources combined the elements of ...

  • A WebGIS Decision Support System for Management of Abandoned Mines

    Ranka Stanković, Nikola Vulović, Nikola Lilić, Ivan Obradović, Radule Tošović, Milica Pešić-Georgiadis (2016)
    ... can be selected from several different types: topo map, street map, satellite imagery or road, depending on the point of view and interest in abandoned mine sites. Namely, it is possible to select Simple or Road Open Street Maps or several types of ArcGIS layers, such as World Topo, World Street or ...
    ... the territory of AP Vojvodina”. Author Contributions: Ranka Stanković contributed database design and software development; Nikola Vulović contributed WebGIS development; Nikola Lilić contributed design of abandoned mines cadastre; Ivan Obradović contributed method of analytical hierarchy process; ...

  • Mesozoic carbonate rocks in Serbia used as dimension stone

    Vesna Matović, Tijana Vojnović Ćalić (2016)
    The building industry in Serbia uses, to a great extent, imported natural stone for architectural purposes. The significance of local deposits, particularly limestones, is not adequately perceived despite the country’s abundance of these valuable resources. Therefore, this study focuses on Serbia’s Mesozoic carbonate rocks, specifically on the deposits of four selected quarries: Klisura, Skrzut, Struganik, and Tisnica. The quality and prospects of the application of these limestones has not yet been the subject of a detailed, comprehensive investigation. Therefore, ...
    Ukrasni kamen, Mezozoik, Krečnjak, Srbija, Petrografija, Fizičko-mehanička svojstva
    ... suitable size) and market demand (Luodes et al. 2000). Despite the fact that concrete and glass were the prin- cipal materials in architectural design during the 1970s and 1980s, in the last three decades, the demand for dimension stone has continuously increased (Siegesmund and Sneth- lage ...
    ... of stone (Siegesmund and Torok 2011). New technologies, leading to substantial advances in excavation and processing, fur- ther extend modern design possibilities. Today, the global leaders in dimension stone production are Asia (50 % of world production in 2004) and Europe (~38 %) (Montani ...

  • GIS Application Improvement with Multilingual Lexical and Terminological Resources

    Ranka Stanković, Ivan Obradović, Olivera Kitanović (2010)
    ... geological models (Richard, Matti, Soller, 2003), interchange schemes (SEE Grid, 2009), and standards proposed by ISO TC211 (ISO, 2009). The design is also significantly influenced by the Ontology Web Language (OWL). GeolISS is implemented using ESRI ArcGIS technology1, and designed to function ...

  • Split-Desktop software for the analysis of fragment size distribution of blasted rock mass

    Milanka Negovanović, Lazar Kričak, Stefan Milanović, Jovan Marković, Nikola Simić, Snežana Ignjatović (2023)
    Drobljenje stena je najvažniji pokazatelj u proceni efekata miniranja pri proizvodnom miniranju u površinskoj eksploataciji. Stepen drobljenja stena ima veliki uticaj na efikasnost daljih operacija utovara, transporta, drobljenja i mlevenja. Optimalno drobljenje stena pri proizvodnom miniranju utiče na smanjenje ukupnih troškova proizvodnje. Stoga je pouzdana procena veličine drobljenja odminirane stenske mase veoma važno pitanje, ne samo u operacijama miniranja, već i u rudarskoj proizvodnji. Za predviđanje distribucije veličine komada odminirane stenske mase postoje različiti empirijski modeli. KUZ-RAM model omogućava ...
    Split-Desktop softver, drobljenje stena, miniranje, analiza, digitalna obrada fotografija

  • Model inteligentnog sistema adaptivnog upravljanja procesom prerade rude

    Ivana M. Jovanović (2016-01-13)
    U oblasti procesa prerade rude, flotacijska koncentracija predstavlja jednu od najznačajnijih i najčešće primenjivanih metoda separacije korisnih od nekorisnih minerala. Samim tim, veoma je važno osigurati uspešan rad flotacijskog postrojenja kroz dostizanje zadovoljavajućih tehno-ekonomskih pokazatelja. Cilj upravljanja procesom flotacijske koncentracije je upravo optimizacija kvaliteta i iskorišćenja korisne komponente u koncentratu uz maksimizaciju profita. Shodno tome, istraživanja na polju modelovanja i upravljanja ovim procesom zauzimaju značajno mesto u praksi kontolnog inženjenringa.Teorijska istraživanja u okviru doktorske disertacije obuhvatila su analizu položaja ...
    flotacijska koncentracija, modelovanje, upravljanje, inteligentni sistem, soft kompjuting, fazi logika, veštačke neuronske mreže
    ... 95. Harris, M.C., Runge, K.C., Whiten, W.J., Morrison, R.D., 2002. JKSimFloat as a practical tool for flotation process design and optimization. Mineral Processing Plant Design, Practice and Control, Vol. 1 (Edited by A.L. Mular, D.N. Halbe and D.J. Barrat), pp. 461-478 96. Hay, M.P., 2008. Optimising ...
    ... D. Sbárbaro, R. del Villar), Chapter 7, pp. 287–308. 45. Cisternas, L.A., Lucay, F., Gálvez, E.D., 2014. Effect of the objective function in the design of concentration plants. Minerals Engineering 63, pp. 16–24 46. Citir, C., Aktas, Z., Berber, R., 2004. Off-line image analysis for froth flotation ...
    ... Chapter 6, pp. 249–286 57. Delport, R., 2005. Process identification using second order Volterra models for nonlinear model predictive control design of flotation circuits. M.Sc. thesis, Faculty of Engineering, the Built Environment and Information Technology, University of Pretoria, 137 p. 58 ...

  • Praktikum za vežbe iz Informatike 1

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Mirjana Banković (2014)
    informatika

  • Транспортни систем за руду на површинском копу Бувач

    Никола Аџић (2024)
    У општем делу овог рада ће бити наведени утоварно-транспортни системи, њихова подела и основни елементи. У оквиру тога ће бити детаљније објашњени сви појединачни делови ових система као што су багери, камиони, дробилице и транспортери са траком. Даље ће бити наведени програмски пакети који се користе за прорачун ових система Talpac који се користи за прорачун дисконтинуалног транспорта и Helix који се користи за прорачун транспортера са траком. У специјалном делу су наведени параметри које мора да испуни пројектовани ...
    транспортни систем, камион, багер, транспортер са траком, дробилица
    ... Prepared By Design Date Page 1/1 Katedra Nikola 17 September 2024 Idler Category Idler Description Carry Side Idlers Sandvik Carry Series 15 3 Roll Carry 127 Plain Return Side Idlers Sandvik Vee Return Vee Return Series 60 2 Roll Offset 178 Dia Idler Design Belt Width 1200 ...
    ... 2024 11:13 Tension Calculations - Summary Belt Sag Page 41/2 Project Zavrsni rad Client Katedra Project No. PreparedBy · Nikola Conveyor No. T2 Design Date 17 September 2024 Allowable Belt Sag % Running 15 % Allowable Belt Sag % Start / Stop 5 % Takeup Mass 10500 kg Running Starting Braking Coasting ...
    ... Zavrsni rad Project No. Conveyor No. T2 Takeup & Drive Traction Calculation Rudarsko-geoloski fakultet Client Katedra PreparedBy · Nikola Design Date . 17 September 2024 Page 41/1 Drive Torque Start-up Factor Loaded 100 % Takeup Pulley Belt Tension 51.49 kN Drive Torque Start-up Factor ...

  • Одређивање оптималних параметара цевовода за двофазни проток

    Николина Ћурчић (2024)
    Eфикасно управљање протоком флуида је кључно за оптимизацију перформанси система и обезбеђивање оперативне сигурности. Двофазни ток, који подразумева истовремено присуство течне и гасне фазе унутар цевовода и измењивача топлоте, представља један од најсложенијих аспеката динамике флуида. Овај феномен намеће јединствене изазове који захтевају дубоко разумевање и прецизно планирање. Ефикасно управљање двофазним током није само кључно за одржавање ефикасности система, већ је и неопходно за спречавање потенцијалних проблема као што су повећана ерозија, неочекиване флуктуације притиска и ризици по безбедност. У ...
    евовод, оптимизација, двофазни проток, параметри цевовода, трошкови
    ... relationship-calculate/ 37 Kurth, N. (2019, May 21). 7wo Phase Flow Liquid-Gas System Design. Retrieved from FluidFlow: · https://blog.fluidflowinfo.com/two-phase-liquid-gas-flow-system- design Liu, H. (1998, September 8). Pipeline technology. Retrieved from Britannica: https://www.britannica ...

  • LRMI markup of OER content within the BAEKTEL project

    Ranka Stanković, Daniela Carlucci, Olivera Kitanović, Nikola Vulović, Bojan Zlatić (2015)
    ... allows building of web, desktop, and mobile applications that work with local Open edX instances, use Representational State Transfer (REST) design principles and support JavaScript Object Notation (JSON) data- interchange format. The Course Info API exposes all the attributes of a course ...

  • 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".
    stabilnost kosina, povećanje nagiba kosina, metoda konačnih elemenata

  • 3D modeling and monitoring of karst system as a base for its evaluation and utilization: a case study from eastern Serbia

    Saša Milanović, Zoran Stevanović, Ljiljana Vasić, Vesna Ristić-Vakanjac (2013)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Novi model za postizanje optimalne proizvodnje na naftnom polju Amal

    Elnori Elmabrouk Ali Elhaddad (2015-04-16)
    Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...
    nafta, proizvodnja, optimizacija, Amal, Libija
    ... Recovery Conference, Kuala Lumpur, Malaysia. BaiZ.S., Wang H.L. (2007) Crude Oil Desalting Using Hydrocyclones, Chemical Engineering Research and Design, Volume 85, Issue 12, 1586-1590 Bande R.M., Prasad B., Mishra I.M., Wasewar K.L., (2008) Oil field effluent water treatment for safe disposal by ...
    ... Danilovic D., KarovicMaricic V., Batalovic V., Lekovic B., (2012) Device for more efficiency production of heavy oil, Chemical Engineering Research and Design, 90 (2), 238-242. Danilovic D., (2011) Development of specific heatingcablesforapplicationin oilwell, Ministry of Science and Technological ...
    ... Monetary Fund, Washington, DC. Deng F., Deng J., Yan W., Zhu H., Huang L., Chen Z., (2013) The influence of fine particles composition on optimal design of sand control in offshore oilfield, J Petrol Explor Prod Technol, DOI 10.1007/s13202-012-0045-7. Denney D., (2002). “Simulation and optimization ...

  • Novi model za postizanje optimalne proizvodnje na naftnom polju Amal

    Elnori Elmabrouk Ali Elhaddad (2015-04-16)
    Doktorskom disertacijom analizirani su i proučavani problemi proizvodnje nafte iprimenjene metode za njihovo rešavanje na naftnom polju Amal. Ukratko jeprikazana proizvodnje nafte u Libiji, njene karakteristike i rezerve, da bi se videoznačaj ovog naftnog polja.Utvrđeno je da su na naftnom polju Amal ključni problemi koji prate procesproizvodnje taloženje parafina, pojava slojnog peska, neefikasan rad gasliftsistema, neefikasna desalinizacija nafte i ekološki problemi. Proizvodniproblemi, pojedinačno i više njih zajedno, na nekim bušotinama uzrokovali susmanjenje proizvodnje nafte od 40 do 75%. Zbog ...
    nafta, proizvodnja, optimizacija, Amal, Libija
    ... Recovery Conference, Kuala Lumpur, Malaysia. BaiZ.S., Wang H.L. (2007) Crude Oil Desalting Using Hydrocyclones, Chemical Engineering Research and Design, Volume 85, Issue 12, 1586-1590 Bande R.M., Prasad B., Mishra I.M., Wasewar K.L., (2008) Oil field effluent water treatment for safe disposal by ...
    ... Danilovic D., KarovicMaricic V., Batalovic V., Lekovic B., (2012) Device for more efficiency production of heavy oil, Chemical Engineering Research and Design, 90 (2), 238-242. Danilovic D., (2011) Development of specific heatingcablesforapplicationin oilwell, Ministry of Science and Technological ...
    ... Monetary Fund, Washington, DC. Deng F., Deng J., Yan W., Zhu H., Huang L., Chen Z., (2013) The influence of fine particles composition on optimal design of sand control in offshore oilfield, J Petrol Explor Prod Technol, DOI 10.1007/s13202-012-0045-7. Denney D., (2002). “Simulation and optimization ...

  • Izdvajanje vode iz prirodnog gasa

    Dejan Nedeljkov (2024)
    U radu je istaknuto važnost prirodnog gasa kao vitalna komponenta svetske energetike.Spada u najsigurnije,najčistije i najkorisnije fosilno gorivo. Sama pojava vode u vidu vlage u gasu je pokazatelj lošeg kvaliteta gasa. parametri koji mogu dovesti do lošeg kvaliteta prirodnog gasa kao pokazatelj je Wobbe index.U okviru istraživanja u master radu glavni problem funkcionisanja na KPG Paliću predstavlja vlaga u gasu,takođe se može zaključiti da kvalitet gasa zavisi od Wobbe indeksa odnosno, što je Wobbe veći, čistiji je gas, ili ...
    prirodni gas, separatori, separacija, grejači, čileri, tačka rose, Wobbe indeks
    ... pri redukciji pritiska se može izračunati korišćenjem i-s dijagrama.!! 5.2.2. Jednostepena i višestepena separacija !0 Bill Smith, C.E. Crest: Design of heavy crude facilities exlpored, Oil and Gas Journal, July, 1979, str. 256 !! B. A. Krivošein, L. E. Hodanovič: Opredelenie integralnogo droselo ...
    ... separatora šalju na dalju obradu, skladištenje ili transport. t · -, OOT| } t t d PArnold, K.,Stewart, M. „Surface Production Operations: Design of Oil Handling Systems and Facilities“..Burlington.,Elsevier.,1999..str.86 14 Slika 4. Jednostepena separacija Izvor: Mićić, R., “Priprema ...
    ... ostvari standarde koje očekuje od njih firma kojoj se isporučuje gas. 49 LITERATURA [1] Arnold, K., Stewart M.,Surface Production Operations, Design of Gas Handling Systems and Facilities Burlington Elsevier, 1999.godine [2]American Petroleum Institute, Specification for Oil and Gas Separators ...