Претрага
704 items
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Short-term forecasting of PM10 and PM2.5 concentrations with Facebook's Prophet Model at the Belgrade-Zeleno brdo
Filip Arnaut, Vesna Cvetkov, Dragana Đurić, Mileva Samardžić-Petrović. "Short-term forecasting of PM10 and PM2.5 concentrations with Facebook's Prophet Model at the Belgrade-Zeleno brdo" in Geofizika (2023). https://doi.org/10.15233/gfz.2023.40.7
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Konstitutivne zavisnosti komunalnog otpada sa deponija u Srbiji
Dragoslav Rakić (2013-05-10)U disertaciji su prikazani rezultati laboratorijskih ispitivanja uzoraka komunalnogotpada dobijeni u aparatima za direktno smicanje i edometarskim aparatima (jedanedometarski aparat konstruisan je za potrebe ove disertacije). Sva ispitivanja su izvršenana veštački pripremljenim uzorcima, uz uvažavanje preporuka koje se odnose nadimenzije korišćenih aparata i veličinu najvećih frakcija u uzorku (EN 1997-2, ASTM2007-a, 2007-b). Za formiranje uzoraka korišćen je komunalni otpad različite starosti,uzet sa dve deponije u Srbiji (Ade Huje u Beogradu i gradske deponije u Novom Sadu).Interpretacija rezultata dobijenih iz ...komunalni otpad, deponija, geotehnička klasifikacija, čvrstoća smicanja,deformabilnost, indeks primarne kompresije, indeks sekundarne kompresije, modelisleganja... 101 5.1 Opšte o modelima tla 102 5.1.1 Elastični modeli 103 5.1.2 Elasto-plastični modeli 109 5.1.3 Plastični modeli 115 5.2 Opšte o konstitutivnim modelima komunalnog otpada 118 5.2.1 Konstitutivni model Machado i dr. (2002) 121 5.2.2 Konstitutivni model Babu i dr. (2010) 125 ...
... komunalnog otpada 394 9.2 Modeli sleganja komunalnog otpada 398 9.2.1 Modeli zasnovani na teoriji konsolidacije 399 9.2.2 Empirijski modeli 404 9.2.3 Reološki modeli 410 9.2.4 Biloški modeli 412 9.3 Validacija parametara deformabilnosti korišćenjem različitih modela u analizi sleganja komunalnog ...
... (5.9) 5.1.2. Elasto-plastični modeli Pomoću ovih modela najuspešnije se prikazuje ponašanje realnog tla. U ovu grupu modela spadaju: idealno elastični – idealno plastični model; Cam-Clay i modifikovani Cam-Clay model; deformacijsko – omekšavajući model. U nastavku teksta će se dati samo ...Dragoslav Rakić. "Konstitutivne zavisnosti komunalnog otpada sa deponija u Srbiji" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-05-10)
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Konstitutivne zavisnosti komunalnog otpada sa deponija u Srbiji
Dragoslav Rakić (2013-05-10)U disertaciji su prikazani rezultati laboratorijskih ispitivanja uzoraka komunalnogotpada dobijeni u aparatima za direktno smicanje i edometarskim aparatima (jedanedometarski aparat konstruisan je za potrebe ove disertacije). Sva ispitivanja su izvršenana veštački pripremljenim uzorcima, uz uvažavanje preporuka koje se odnose nadimenzije korišćenih aparata i veličinu najvećih frakcija u uzorku (EN 1997-2, ASTM2007-a, 2007-b). Za formiranje uzoraka korišćen je komunalni otpad različite starosti,uzet sa dve deponije u Srbiji (Ade Huje u Beogradu i gradske deponije u Novom Sadu).Interpretacija rezultata dobijenih iz ...komunalni otpad, deponija, geotehnička klasifikacija, čvrstoća smicanja,deformabilnost, indeks primarne kompresije, indeks sekundarne kompresije, modelisleganja... 101 5.1 Opšte o modelima tla 102 5.1.1 Elastični modeli 103 5.1.2 Elasto-plastični modeli 109 5.1.3 Plastični modeli 115 5.2 Opšte o konstitutivnim modelima komunalnog otpada 118 5.2.1 Konstitutivni model Machado i dr. (2002) 121 5.2.2 Konstitutivni model Babu i dr. (2010) 125 ...
... komunalnog otpada 394 9.2 Modeli sleganja komunalnog otpada 398 9.2.1 Modeli zasnovani na teoriji konsolidacije 399 9.2.2 Empirijski modeli 404 9.2.3 Reološki modeli 410 9.2.4 Biloški modeli 412 9.3 Validacija parametara deformabilnosti korišćenjem različitih modela u analizi sleganja komunalnog ...
... (5.9) 5.1.2. Elasto-plastični modeli Pomoću ovih modela najuspešnije se prikazuje ponašanje realnog tla. U ovu grupu modela spadaju: idealno elastični – idealno plastični model; Cam-Clay i modifikovani Cam-Clay model; deformacijsko – omekšavajući model. U nastavku teksta će se dati samo ...Dragoslav Rakić. "Konstitutivne zavisnosti komunalnog otpada sa deponija u Srbiji" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2013-05-10)
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Application of stochastic models for mine planning and coal quality control
... rameter. Slave parameter for homogenization is coal heating value. The integral model for coal quality control is developed and consists of three sub-models: operational mine scheduling model, stocking model and reclaiming model, fig. 5. According simulated daily or shift mine plan each BWE has working ...
... This model, in general, is based on predicted information about the in-situ quality of the coal deposit. Consequently, production scheduling for the purpose of controlling coal quality, e. g., sulfur, have to be based on the predicted data of the contemplated mining benches. The model uses zero-one ...
... within pile, fig. 2. The shadings of layer's cross-sections in fig. 2 are corresponding to the percentage of sulfur. The reclaiming model Developed reclaiming model determines the tonnage of coal to be loaded from stockyard piles by reclaimer, so that the total sulfur con- tent of the reclaimed ...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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Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention
Gas wells, particularly those situated onshore, play a vital role in the global energy sector by supplying a significant portion of natural gas. However, operational challenges, notably gas hydrate formation, pose substantial issues, leading to complications such as flowline blockages and unexpected well shutdowns. Gas hydrates, crystalline structures resembling ice, ...Gas Well, Gas Hydrate Formation, Well Modeling, Well Performance Optimization, Choke Position Adjustments, Methanol InjectionMilica Ješić, Bojan Martinović, Stefan Stančić, Miroslav Crnogorac, Dušan Danilović. "Mitigating hydrate formation in onshore gas wells: A case study on optimization techniques and prevention" in Underground Mining Engineering, Beograd : Rudarsko-geološki fakultet (2023)
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Nonequilibrium athermal random-field Ising model on hexagonal lattices
Svetislav Mijatović, Dragutin Jovković, Đorđe Spasojević. "Nonequilibrium athermal random-field Ising model on hexagonal lattices" in Physical Review E, American Physical Society (APS) (2021). https://doi.org/10.1103/PhysRevE.103.032147
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Approach to operational mine planning: Case study Tamnava West
... of bench geometry for Tamnava West, final bench design is done semi automatically. Created 3D model of benches is grid type, and as such is suitable for interaction with created geological grid model. 2.1.5. Discretization of pit benches on mining blocks In order to make operational planning ...
... statistic analyses of Ash/LCV corelation 2.1.2. Geological Modeling The geological model for Tamnava West was developed using the Minex software package with the data provided by EPS. To provide a better structural model, the technique within Minex called the "Splitting" and "Father and Son" concept ...
... sandstone and overburden river sediments have been modeled within a stratigraphic section up to 98 m thick. The reason for so detail model lies in the fact that this model is base for coal homogenization process, so it need to represent as real as possible every lithological member within minimum ...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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The origin and age of the metamorphic sole from the Rogozna Mts., Western Vardar Belt: New support for the one-ocean model for the Balkan ophiolites
Borojević-Šoštarić Sibila, Palinkaš Ladislav, Neubauer Franz, Cvetković Vladica, Bernroider Manfred, Genser Johann (2013)Borojević-Šoštarić Sibila, Palinkaš Ladislav, Neubauer Franz, Cvetković Vladica, Bernroider Manfred, Genser Johann. "The origin and age of the metamorphic sole from the Rogozna Mts., Western Vardar Belt: New support for the one-ocean model for the Balkan ophiolites" in 11th Workshop on Alpine Geological Studies & 7th IFAA 99, Schladming, Austria:EGU (2013): 20-21
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New evidence for the one-ocean model for the Balkan ophiolites: the origin and age of the metamorphic sole from the Rogozna Mts., Western Vardar Belt
Borojević-Šoštarić Sibila, Palinkaš Ladislav, Neubauer Franz, Cvetković Vladica, Bernroider Manfred, Genser Johann (2014)Borojević-Šoštarić Sibila, Palinkaš Ladislav, Neubauer Franz, Cvetković Vladica, Bernroider Manfred, Genser Johann. "New evidence for the one-ocean model for the Balkan ophiolites: the origin and age of the metamorphic sole from the Rogozna Mts., Western Vardar Belt" in Bul. Shk. Gjeol., 1/2014 - Special Issue. Proceedings of XX CBGA Congress no. 1, Tirana, Albania: (2014): 9-9
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Simulacija režima karstne izdani primenom 3D hidrodinamičkog modela na primeru Pirotske kotline i karstnog masiva Stare planine
Polomčić Dušan, Ristić-Vakanjac Vesna, Bajić Dragoljub, Čokorilo Ilić Marina. "Simulacija režima karstne izdani primenom 3D hidrodinamičkog modela na primeru Pirotske kotline i karstnog masiva Stare planine" in Pirotski zbornik, Pirot, Srbija:Narodna biblioteka Pirot (2014): 51-70
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Simplified model for determining rock mass oscillation velocity at limestone deposit
Suzana Lutovac, Branko Gluščević, Miloš Gligorić, Jelena Majstorović, Rade Tokalić. "Simplified model for determining rock mass oscillation velocity at limestone deposit" in Prospects for developing resource-saving technologies in mineral mining and processing, UNIVERSITAS Publishing - Petrosani, Romania (2022)
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Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings
... 15 of 18 Model 2 v2 = 50.4220R−1.3730 (56) Model 3 Table 6 shows the data for calculating the parameters of rock masses oscillation equation in Nepričava open pit according to Model 3. Table 6. Representation of data for calculating the parameters in Nepričava open pit according to Model 3. Ri xi ...
... values obtained by experimental measurements. 3.3.1. Model 1—Determining the Parameters by Applying the Least Square Method The Least Square Method is mainly used to obtain the parameters K and n which represents a common model [9,10]. 3.3.2. Model 2—Determining the Parameters through the Application ...
... n of rock masses oscillation velocity in Majdanpek open pit. Model 2 v2 = 158.5234R−1.8568 (45) Model 3 Table 2 shows the data for calculating the parameters of rock masses oscillation equation in Majdanpek open pit according to Model 3. Minerals 2018, 8,70 10 of 18 Table 1. Survey of blasting ...Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić. "Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings" in Minerals, Basel : MDPI AG, Basel, Switzerland (2018). https://doi.org/10.3390/min8020070
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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 ...... saznanja definisan je novi model za postizanje optimalne proizvodnje nafte. Model se sastoji iz dva ključna dela, prvog koji se bavi rešavanjem proizvodnih problema i drugog za određivanje optimalnih parametara rada gaslifta. Originalnost modela leži i u činjenici da se u model egzaktno uvode ekološki ...
... 2023-10-14 03:47:04 Novi model za postizanje optimalne proizvodnje na naftnom polju Amal;New model for achieving optimum production at Amal oilfield. Elnori Elmabrouk Ali Elhaddad Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Novi model za postizanje optimalne ...
... korišćenja. 29 5. NOVI MODEL ZA POSTIZANJE OPTIMALNE PROIZVODNJE NAFTE Na osnovu karakteristika naftnog polja Amala (poglavlje 3) i detaljne analize proizvodnih problema (poglavlje 4) definisan je novi model za postizanje optimalne proizvodnje nafte (slika 5.1). Model se sastoji iz dva ključna ...Elnori Elmabrouk Ali Elhaddad. "Novi model za postizanje optimalne proizvodnje na naftnom polju Amal" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-04-16)
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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 ...... saznanja definisan je novi model za postizanje optimalne proizvodnje nafte. Model se sastoji iz dva ključna dela, prvog koji se bavi rešavanjem proizvodnih problema i drugog za određivanje optimalnih parametara rada gaslifta. Originalnost modela leži i u činjenici da se u model egzaktno uvode ekološki ...
... 2023-10-14 03:53:31 Novi model za postizanje optimalne proizvodnje na naftnom polju Amal;New model for achieving optimum production at Amal oilfield. Elnori Elmabrouk Ali Elhaddad Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Novi model za postizanje optimalne ...
... korišćenja. 29 5. NOVI MODEL ZA POSTIZANJE OPTIMALNE PROIZVODNJE NAFTE Na osnovu karakteristika naftnog polja Amala (poglavlje 3) i detaljne analize proizvodnih problema (poglavlje 4) definisan je novi model za postizanje optimalne proizvodnje nafte (slika 5.1). Model se sastoji iz dva ključna ...Elnori Elmabrouk Ali Elhaddad. "Novi model za postizanje optimalne proizvodnje na naftnom polju Amal" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-04-16)
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Preliminary regional landslide susceptibility assessment using limited data
Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska (2019)In this paper a heuristic approach for preliminary regional landslide susceptibility assessment using limited amount of data is presented. It is called arbitrary polynomial method and takes into account 5 landslide conditioning parameters: lithology, slope inclination, average annual rainfall, land use and maximum expected seismic intensity. According to the method, in the first stage, a gradation is performed for each of the carefully selected conditioning parameters by assigning so called rating points to the grid cells on which the ...... ity model. Extraction of a particular land- slide conditioning parameter and repetition of the validation pro- cess is one approach to test model sensitivity (LEE & TALIB, 2005; GUZZETTI et al., 2006). Other approaches for testing the sensitivity of a particular landslide susceptibility model (and ...
... 77 % of the total landslides mapped. A landslide susceptibility model with the lowest percent of landslides in classes with very high and high susceptibility is the WAP-TLSR-100. According to this model 58.75% of the region’s Model Susceptibility class Value of W-TLSR Area (km2) Area (%) ...
... Total Landslide Susceptibility Rating (TLSR) model is obtained by summing the individual rating points of each parameter and divid- ing the region into five susceptibility zones according to Jenks natural breaks classification. Ver- ification of the TLSR model is then performed by overlaying the landslide ...Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska. "Preliminary regional landslide susceptibility assessment using limited data" in Geologica Croatica , Croatian Geological Society (2019). https://doi.org/10.4154/gc.2019.03
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A transient three-dimensional numerical model of water impermeable screen effects on the groundwater inflow reduction into the mine (Case Study: Open pit mine Drmno, Serbia)
Šubaranović Tomislav, Polomčić Dušan, Pavlović Vladimir, Pakić N. "A transient three-dimensional numerical model of water impermeable screen effects on the groundwater inflow reduction into the mine (Case Study: Open pit mine Drmno, Serbia)" in Proceedings on CD-ROM [Elektronski izvor]. Vol. 1-2 / 11th International Conference Research and Development in Mechanical Industry - RaDMI 2011, 15-18. September 2011, Sokobanja, Serbia, Vrnjačka Banja:Scientific and Technical Center for Intellectual Property (2011): 1257-1265
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2D geological-geophysical model of the Timok Complex (Serbia, SE Europe): A new perspective from aeromagnetic and gravity data
Ignjatović Snežana, Vasiljević Ivana, Burazer Milenko, Banješević Miodrag, Strmbanović Ivan, Cvetković Vladica (2014)Ignjatović Snežana, Vasiljević Ivana, Burazer Milenko, Banješević Miodrag, Strmbanović Ivan, Cvetković Vladica. "2D geological-geophysical model of the Timok Complex (Serbia, SE Europe): A new perspective from aeromagnetic and gravity data" in Swiss Journal of Geosciences 107 no. 1, Basel:Birkhaeuser Verlag AG (Birkhäuser Basel) (2014): 101-112. https://doi.org/10.1007/s00015-014-0161-0
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Development of a fuzzy model for predicting the penetration rate of tricone rotary blasthole drilling in open pit mines
Kričak Lazar, Negovanović Milanka, Mitrović Stojan, Miljanović Igor, Nurić Samir, Nurić Adila (2015)Kričak Lazar, Negovanović Milanka, Mitrović Stojan, Miljanović Igor, Nurić Samir, Nurić Adila. "Development of a fuzzy model for predicting the penetration rate of tricone rotary blasthole drilling in open pit mines" in The Journal of the Southern African Institute of Mining and Metallurgy 115 no. 11, Johannesburg, The South African Republic:The Southern African Institute of Mining and Metallurgy (2015): 1065-1071. https://doi.org/10.17159/2411-9717/2015/v115n1
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INVENTS: A Hybrid Mine Ventilation Planning and Design System
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 ...... diagrams architecture. This architecture supports the object-oriented approach in model development for complex applications. Its main characteristic is the separation of domain model and user interface. The domain model is represented by business services and data services, while the user interface ...
... linear ventilation scheme. In figure 7 an activity diagram depicts the dynamic model of the Simulation-Fire class that encompasses characteristic procedures in the execution of logic for the airflow calculation model in the conditions of fire incidence in complex mine ventilation networks. NetMain ...
... the SimVent data service: Baza and BazaSimVent, which represent modules. In view of the complexity of the INVENTS system’s global model data structure, which had to model all relevant parameters of complex mine ventilation networks, the design and realization of database was executed in the MSAccess ...Lilić Nikola, Stanković Ranka, Obradović Ivan. "INVENTS: A Hybrid Mine Ventilation Planning and Design System" in Proceedings of International Scientific Conference of FME Session 4: Automation Control and Applied Informatics , Hong Kong : iConcept Press (2013)
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INVENTS: a hybrid system for subsurface ventilation analysis
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 ...... diagrams architecture. This architecture supports the object-oriented approach in model development for complex applications. Its main characteristic is the separation of domain model and user interface. The domain model is represented by business services and data services, while the user interface ...
... linear ventilation scheme. In figure 7 an activity diagram depicts the dynamic model of the Simulation-Fire class that encompasses characteristic procedures in the execution of logic for the airflow calculation model in the conditions of fire incidence in complex mine ventilation networks. NetMain ...
... the SimVent data service: Baza and BazaSimVent, which represent modules. In view of the complexity of the INVENTS system’s global model data structure, which had to model all relevant parameters of complex mine ventilation networks, the design and realization of database was executed in the MSAccess ...Nikola Lilić, Ranka Stanković, Ivan Obradović. "INVENTS: a hybrid system for subsurface ventilation analysis" in Proc. of International Scientific Conference of FME, September 2000, Ostrava, FME (2000)