Претрага
1171 items
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Design of a sucker rod pumping system
Ana Ponoćko (2024)For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...... Danilović, mentor Faculty of Mining and Geology Belgrade doc. dr Miroslav Crnogorac, member Faculty of Mining and Geology Belgrade prof. dr Dejan Ivezić, member Faculty of Mining and Geology Belgrade Defense date: SUMMARY For a long time in the history of oil production, sucker rod pumps ...
... API Class D: Generally contains more manganese and chromium than Class K. Used in deep wells or wells with very high loads. Class D is made to withstand medium to very heavy loads in non-corrosive (inhibited) conditions and is further categorized by quality: D-carbon, D-alloy, D-special (AISI ...
... INPUT DATA CALCULATED RESULTS (TOTAL SCORE: 53% GRADE: F) Taraet Prod.(m"D): — 11 Fluid level Production rate (m"/D): 10.9 Peak pol.pod ioad (N): · 24758 Run time (hrs/day): — 24.0 (mfrom surtace): - 120 'Oš production (m"/D): 2,6 Min. pol.rodioad (N): — 13944 Tubina pres. (kPa): | 600 (mover pump): ...Ana Ponoćko. Design of a sucker rod pumping system, 2024
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Is the Sava-Vardar zone a remnant of an Upper Cretaceous ocen? Pro et contra
... ocen? Pro et contra Vladica Cvetković, Dejan Prelević, Ana Mladenović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Is the Sava-Vardar zone a remnant of an Upper Cretaceous ocen? Pro et contra | Vladica Cvetković, Dejan Prelević, Ana Mladenović | Fifth Congress ...
... Schmid, S. M. Bemoull, D., Figenschuh, B., Matenco, L., Schefer, S., Schuster, R., ... & Ustaszewski, K. (2008). The Alpine-Carpathian-Dinaridic orogenic system: correlation and evolution of tectonic units. Swiss Journal of Geosciences, 101, 139-183. 3. Prelević, D., Wehrheim, S., Reutter ...
... 65(2), 117-130. 5. Galihofer, D., Quadt, A. V., Peytcheva, L, Schmid, S. M. & Heinrich, C. A. (2015). Tectonic, magmatic, and metallogenic cvolution of the Late Cretaceous arc in the Carpathian- Balkan orogen. 7Tecfonics, 34, 1813-1836. 6. Sokol, K., Prelević, D., Romer, R. L., Božović, M., ...Vladica Cvetković, Dejan Prelević, Ana Mladenović. "Is the Sava-Vardar zone a remnant of an Upper Cretaceous ocen? Pro et contra" in Fifth Congress of Geologists of the Republic of North Macedonia, Ohrid, 2024, Macedonian Geological Society (2024)
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Application of VIКOR method in the selection of an optimal splution of excavation “Borska Reka” ore deposit
Sanja Bajić, Dragoljub Bajić, Branko Glušćević, Radmila Gaćina. "Application of VIКOR method in the selection of an optimal splution of excavation “Borska Reka” ore deposit" in 9th International Conference Mining and Environmental protection MEP, 24 – 27 May 2023, Sokobanja, Serbia , Belgrade : University of Belgrade-Faculty of mining and geology (2023)
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Gasifikacija čvrstih goriva
Anđela Nedeljković (2023)Ovaj rad proizvod je višemesečnog istraživanja i proučavanja literature u oblasti gasifikacije čvrstih goriva. Obrađeni su različiti tipovi goriva koji se koriste u procesu gasifikacije, kao i osnovni tipovi gasgeneratora, njihove karakteristike i primene. Analizirana je podzemna gasifikacija i IGCC sistem kako bi se proširilo razumevanje mogućnosti ovih tehnologija u postizanju ciljeva održivosti i efikasnosti u energetskom sektoru. Istražene su ključne prednosti i izazovi koji proizlaze iz primene gasifikacije u industrijskim i energetskim procesima. Kroz analizu ove tehnologije, cilj ...Anđela Nedeljković. Gasifikacija čvrstih goriva, 2023
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Концепт расположивости при дефинисању ефикасног одржавања помоћне механизације на површинским коповима
Radiša D. Đurić (2016-05-30)Оцена расположивости представља основну компоненту уинжењерском управљању опремом. Расположивост је свеобухватни концепткоји представља меру употребног квалитета техничких система, који садржичитаву серију парцијалних индикатора који се односе на време у раду ивреме у отказу система као и на његову функционалну погодност. Овадисертација даје структурну анализу парцијалних индикатора као и развојмодела њихове синтезе на ниво расположивости. Поменути подаци имајухибридни карактер (измерени и експертски добијени) и њихова интеграцијаи синтеза је остварена коришћењем фази пропозиције и фази закључивања.Овакав приступ омогућава оцену техничког система ...управљање опремом, инжењерство одржавања,расположивост, фази закључивање, прикупљање података, булдозер... Polovina, D., 2011. Dependability as criteria for bucket wheel excavator revitalization, Journal of Scientific & Industrial Research, 70(1), 13-19 Tanasijević, M., Ivezić, D., Jovančić, P., Ignjatović, D., Bugarić, U., 2013. Dependability assessment of open-pit mines equipment – study on the bases ...
... bases of fuzzy algebra rules, Eksploatacja i Niezawodnosc – Maintenance and Reliability, 15(1), 66–74 Tanasijević, M., Ivezić, D., Jovančić, P., Ćatić, D., Zlatanović, D., 2013. Study of Dependability Evaluation for Multi-hierarchical Systems Based on Max–Min Composition, Quality and Reliability ...
... using evidential reasoning based on subjective safety and coast analyses. Reliability Engineering and System Safety, 52(2), 113-128 Ivezić, D., Tanasijević, M., Ignjatović, D., 2008. Fuzzy Approach to Dependability Performance Evaluation. Quality and Reliability Engineering International, 24(7), 779-792 ...Radiša D. Đurić. "Концепт расположивости при дефинисању ефикасног одржавања помоћне механизације на површинским коповима" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-05-30)
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The Newton method for solving nonlinear equations based on aggregation operators
Nebojša M. Ralević, Dejan Ćebić (2019)Nebojša M. Ralević, Dejan Ćebić. "The Newton method for solving nonlinear equations based on aggregation operators" in XLVI International Symposium on Operational Research SYM-OP-IS, Kladovo, 15-18.9.2019, Универзитет у Београду (2019)
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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
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Terenska nastava iz geofizike: Arheološki lokaliteti na području Trstenika
... Đurić, Jelena Vukčević, Dejan Vučković, Ivana Vasiljević, Vesna Cvetkov Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Terenska nastava iz geofizike: Arheološki lokaliteti na području Trstenika | Dragana Đurić, Jelena Vukčević, Dejan Vučković, Ivana Vasiljević ...
... 365- 389 Вучковић, Д., Бугар, М., Вукчевић, Ј. 2017. Резултати геофизичких истраживања археолошких локалитета у зони Трстеника- елаборат. Народни музеј Крушевац, Крушевац Говедарица Н., Милошевић А., Новичић Д., Савић Н, Ђукић К., Јовановић Н., Ступар И., Милутин Б., Илић Д., Вујичић П., 2018 ...
... ARHEOLOŠKI LOKALITETI NA PODRUČJU TRSTENIKA Dragana Đurić Rudarsko-geološki fakultet, Univerzitet u Beogradu Jelena Vukčević Muzejska zbirka Trstenik Dejan Vučković Rudarsko-geološki fakultet, Univerzitet u Beogradu Ivana Vasiljević Rudarsko-geološki fakultet, Univerzitet u Beogradu Vesna Cvetkov Rud ...Dragana Đurić, Jelena Vukčević, Dejan Vučković, Ivana Vasiljević, Vesna Cvetkov . "Terenska nastava iz geofizike: Arheološki lokaliteti na području Trstenika" in Aktuelna interdisciplinarana istraživanja tehnologije u arheologiji jugoistočne Evrope: zbornik radova / Prvi skup Sekcije za arheometriju, arheotehnologiju, geoarheologiju i eksperimentalnu arheologiju Srpskog arheološkog društva, 28.02.2020., Beograd, Beograd : Srpsko arheološko društvo (2020)
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Geology of the southern part of the Sava-Vardar zone: new constraints from the Klepa Mts.
... from the Klepa Mts. Dejan Prelević, Ana Mladenović, Violeta Gajić, Milena Dunčić, Blažo Boev Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Geology of the southern part of the Sava-Vardar zone: new constraints from the Klepa Mts. | Dejan Prelević, Ana Mladenović ...
... Belgrade – Faculty of Mining and Geology, Serbia, ana.mladenovic(d)rgf-bg.ac.rs, violeta.gajic(argf.bg.ac.rs, dejan.prelevic(ayrgf.:bg.ac.rs ŽSTC NIS Naftagas LLC, milena.duncic(a)nis.rs ŠUniversity Goce Delcev Štip, North Macedonia, blazo.boev(d)ugd.edu.mk Key Words: Tethys closure, Scaglia Rossa, i ...
... Prelević, D., Wehrheim, S., Reutter, M., Romer, R. L., Boev, B., Božović, M., ... & Schmid, S. M. (2017). The Late Cretaceous Klepa basalts in Macedonia (FYROM) — Constraints on the final stage of Tethys closure in the Balkans. Terra Nova, 29(3), 145-153. 2. Van Hinsbergen, D. J., Torsvik ...Dejan Prelević, Ana Mladenović, Violeta Gajić, Milena Dunčić, Blažo Boev. "Geology of the southern part of the Sava-Vardar zone: new constraints from the Klepa Mts." in Fifth Congress of Geologists of the Republic of North Macedonia, Macedonian Geological Society (2024)
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Visokoprovodna d-Bi2O3 faza dopirana vanadijumom
Dapčević Aleksandra, Poleti Dejan, Karanović Ljiljana, Rogan Jelena, Radojković Aleksandar. "Visokoprovodna d-Bi2O3 faza dopirana vanadijumom" in XL Savetovanje Srpskog hemijskog društva, Beograd, Srbija:Srpsko hemijsko društvo (2012): 64-64
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Evidence for Badenian marine transgression in Belgrade (Serbia)
Filip Anđelković, Dejan Radivojević (2019)... transgression in Belgrade (Serbia) Filip Anđelković, Dejan Radivojević Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Evidence for Badenian marine transgression in Belgrade (Serbia) | Filip Anđelković, Dejan Radivojević | AAPG Vienna, Paratethys petroleum systems ...
... s. - The Repository is available at: www.dr.rgf.bg.ac.rs Evidence for Badenian marine transgression in Belgrade (Serbia) Filip Anđelković1 and Dejan Radivojević1 1University of Belgrade, Faculty of Mining and Geology, Department of Regional Geology, Belgrade, Serbia. E-mail: filip.and- jelkovic@rgf ...
... Serbian) Anđelković, M., Anđelković, J. 1997.Badenian cycles in Serbia. Geološki anali Balkanskog poluostrva, 61-2, 1-13 Anđelković, F., Radivojević, D. 2018. A contribution to the knowledge of facial diversity of Badenian sediments in the Belgrade area, 17th Serbian Geological Congress, Vrnjačka Banja ...Filip Anđelković, Dejan Radivojević. "Evidence for Badenian marine transgression in Belgrade (Serbia)" in AAPG Vienna, Paratethys petroleum systems between Central Europe and the Caspian Region, Vienna, 26-27 mart, 2019, AAPG (2019)
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3-D Basin Modeling of the Serbian Banat Region of the Pannonian Basin: Evaluating the Impact of Tectonic Inversion upon Hydrocarbon Potential
Yilmaz Hulia, Pigott John, Radivojević Dejan, Pigott Kulwadee, Milovanović Ivana. "3-D Basin Modeling of the Serbian Banat Region of the Pannonian Basin: Evaluating the Impact of Tectonic Inversion upon Hydrocarbon Potential" in AAPG Search and Discovery Article/AAPG International Conference and Exibition, Milan, Italy no. 90135, Tulsa:Online Journal for E&P Geoscientists (2011)
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Application of stochastic models for mine planning and coal quality control
... coal quality control Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Application of stochastic models for mine planning and coal quality control | Dejan Stevanović, Božo Kolonja ...
... integral of that function: I f X X X f X X X fV a b a b n a b n n n ( ) ( , , , ) ( )� �d d d x1 2 1 2 1 1 2 2 � � � dx � l (8) on the region of integration: Stevanovi}, D. R., et al.: Application of Stochastic Models for Mine Planning ... 1366 THERMAL SCIENCE: Year 2014, Vol ...
... is in the range [(j – 1)d, jd] where d is the cut depth of the reclaimed. Now, the layers can be described by the matrix: X X X X X X X X X n n m m mn 11 12 1 21 22 2 1 2 � � � � � � � where m is the number of stocked layers, l – the length of the bed, and n = l/d. The volume of the material ...Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković. "Application of stochastic models for mine planning and coal quality control" in Thermal Science, Belgrade : Vinča Institute of Nuclear Sciences (2014). https://doi.org/10.2298/TSCI130201031S
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Mean-based iterative methods for finding multiple roots in nonlinear chemistry problems
Dejan Ćebić, Nebojša M. Ralević (2021)Dejan Ćebić, Nebojša M. Ralević. "Mean-based iterative methods for finding multiple roots in nonlinear chemistry problems" in Journal of Mathematical Chemistry, Springer Science and Business Media LLC (2021). https://doi.org/10.1007/s10910-021-01253-3
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Crystal structure of (Bi0.94Sb1.06)S3 and reconsideration of cation distribution over mixed sites in the bismuthinite-stibnite solid-solution series
Poleti Dejan, Karanović Ljiljana, Balić Žunić Tonči, Gržetić Ivan. "Crystal structure of (Bi0.94Sb1.06)S3 and reconsideration of cation distribution over mixed sites in the bismuthinite-stibnite solid-solution series" in Neues Jahrbuch für Mineralogie - Abhandlungen 189 no. 2, Johannesstr. 3A D-70176 Stuttgart, Germany: E. Schweizerbarsche Verlagsbuchhandlung (2012): 177-187. https://doi.org/10.1127/0077-7757/2012/0217
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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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Development of integrated fuzzy model for mine management optimization
Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)... Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Development of integrated fuzzy model for mine management optimization | Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško ...
... Mining engineering DEVELOPMENI OF IN TEGRATED FUZZY MODEL FOR MINE MANAGEMENT OPTIMIZATION Miodrag Čelebić*, Sanja Bajić**, Dragoljub Bajić***", Dejan Stevanović**, Duško Torbica*, Vladimir Malbašić* Received on April 5, 2023 Presented by Ch. Roumenin, Member of BAS, on June 27, 2023 Abstract ...
... triangular fuzzy number, the fuzzy synthetic extent is calculated using; the following; equation: m i n m -1 m m m 1 1 1 S -Ž MLe|.2.MA, |Ž,D-> 552 d|| _—R — L — j=1 i=1 j=1 jel jcl je1 Mdj XOsj M i=l i=l i=1 Step 3. The degree of possibility of two triangular fuzzy numbers is deter- mined ...Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić. "Development of integrated fuzzy model for mine management optimization" in Comptes rendus de l'Académie Bulgare des Sciences (2023)
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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 ...... Laboratory Methods Veljko Rupar 1,*, Vladimir Čebašek 1 , Vladimir Milisavljević 1, Dejan Stevanović 1 and Nikola Živanović 2 ���������� ������� Citation: Rupar, V.; Čebašek, V.; Milisavljević, V.; Stevanović, D.; Živanović, N. Determination of Mechanical Properties of Altered Dacite by Laboratory ...
... Milisavljević, Dejan Stevanović, Nikola Živanović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Determination of Mechanical Properties of Altered Dacite by Laboratory Methods | Veljko Rupar, Vladimir Čebašek, Vladimir Milisavljević, Dejan Stevanović, Nikola ...
... Article Determination of Mechanical Properties of Altered Dacite by Laboratory Methods Veljko Rupar 1’*, Vladimir Ceba’ek 1, Vladimir Milisavljevié 1, Dejan Stevanovié 1 and Nikola Zivanovié ” Mining Department, Mining and Geology Faculty, University of Belgrade, 11000 Belgrade, Serbia; vladimir.cebasek@ref ...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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Методологија интегралне анализе сценарија енергетског развоја
Александар Маџаревић (2019)енергетска безбедност, сценарио развоја, фази логика, сигурност снабдевања, доступност, расположивост, природни гас... transport/mapa- gasovoda.68.html Ivezić D., Danilović D., Živković M., and Madžarević A., Natural gas sector development for last 20 years, Energetika XIV, 2012., pp. 318–322 АЛЕКСАНДАР МАЏАРЕВИЋ 181 ЛИТЕРАТУРА Ivezić D., Živković M., Danilović D., Madzarevic A., Tanasijevic M., The ...
... SCENARIO DEVELOPMENT Doctoral Disertation Belgrade, 2019 Комисија за преглед и одбрану Ментор: др Дејан Ивезић, редовни професор Универзитет у Београду, Рударско-геолошки факултет Изборна научна област: Елементи машинских и енергетских ...
... година, Нови Сад, 2016. Market report, Serbia natural gas sector: prospects, market structure and strategy, 22 August 2016, EY Madžarević, A., Ivezić, D., Živković, M., Tanasijević, M., Ivić, M., Assessment of vulnerability of natural gas supply in Serbia: State and perspective, Energy Policy, Volume ...Александар Маџаревић. Методологија интегралне анализе сценарија енергетског развоја, Рударско-геолошки факултет, 2019
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William „Strata” Smith, otac engleske geologije– 250 godina od rođenja
Dejan Radivojević (2019)... P I S N I C I S R P S K O G G E O L O [ K O G D R U [ T V A za 2019. godinu COMPTES RENDUS DES SÉANCES DE LA SOCIÉTÉ SERBE DE GÉOLOGIE pour les année 2019 REPORTS OF THE SERBIAN GEOLOGICAL SOCIETY for the year 2019 Beograd, 2019. Dejan Radivojević1 WILLIAM „STRATA” SMITH, OTAC ENGLESKE ...
... „Strata” Smith, otac engleske geologije– 250 godina od rođenja Dejan Radivojević Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] William „Strata” Smith, otac engleske geologije– 250 godina od rođenja | Dejan Radivojević | Zbornik radova Srpskog geološkog društva | ...Dejan Radivojević. "William „Strata” Smith, otac engleske geologije– 250 godina od rođenja" in Zbornik radova Srpskog geološkog društva, Srpsko geološko društvo (2019)