Претрага
3552 items
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Dvodimenzionalna geometrijska morfometrija prvih gornjih molara hominina sa teritorije Srbije - taksonomska i metodološka analiza
Predrag N. Radović (2022)Primarni cilj ove studije tiče se taksonomske identifikacije fosilnih prvih gornjih molara (M1) hominina pronađenih u Srbiji, primenom metoda dvodimenzionalne (2D) geometrijske morfometrije. U prvoj (metodološkoj) fazi istraživanja ispitana je efikasnost 16 različitih pristupa (geometrijskih modela) u klasifikaciji M1 neandertalaca i anatomski modernog čoveka. Modeli su testirani na dva seta okluzalnih projekcija krunica (n = 34 i n = 64) dobijenih orijentisanjem digitalnih 3D modela u virtuelnom okruženju ili fotografisanjem fizičkih primeraka zuba. Prilikom testiranja primenjena je klasifikacija zasnovana ...2D geometrijska morfometrija, prvi gornji molar (M1), taksonomska identifikacija, neandertalci, anatomski moderni ljudi, Pešturina, Velika Balanica, SrbijaPredrag N. Radović. Dvodimenzionalna geometrijska morfometrija prvih gornjih molara hominina sa teritorije Srbije - taksonomska i metodološka analiza, Beograd : [P. Radović], 2022
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Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic
Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...... Review and New Model Based on Fuzzy Logic Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy ...
... can only be displayed expertly. In order to form the optimization model, it is necessary to reduce the indicated parameters to the same form in the analytical sense and to find a synthesis model. 3. Development of a Conceptual Model for the Selection of an Artificial Lift Parameters that define the ...
... ns. The model must have an analytical part, looking at all input parameters within the reference values (Table 2), and a synthesis part, input parameters, reduced into one. It is evident that the model is rife with uncertainty, indeterminacy, multidimensionality, and relativity. The model must have ...Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković. "Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic" in Energies, MDPI AG (2020)
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Geotehnički aspekti izgradnje visećeg pešačkog mosta u Starom gradu u Užicu
U radu su prikazani rezultati geotehničkih istraživanja za potrebe izgradnje visećeg pešačkog mosta preko klisure reke Đetinje u Užicu. Predviđeno je da most, sistema prednapregnute trake, omogući prelaz pešacima sa desne dolinske strane na stranu Starog grada, koja je opasana strmom liticom (cca. 40 m visine). Za potrebe formiranja geotehničkog modela i strukturnog sklopa krečnjačke stenske mase korišćen je postupak fotogrametrijskog snimanja dronom. Predviđeno je da se zatežuća sila (od oko 30 MN), koju most prenosi na obalni stub, ...fotogrametrija, stabilnost kosina, pukotine, prednapregnuta sidra, test granične nosivosti, paker (Ližonov) test... koga su prikupljeni podaci o karakteristikama pukotina i stenske mase. Pored toga, kosina je snimljena dronom, što je omogućilo da se formira 3D model terena i da se izvrši analiza strukturnog sklopa stenske mase šireg područja. Tokom izvođenja bušotina u zoni starog grada rađeni su i testovi ...
... napravljen je numerički model stenske mase i izvršeni su proračuni stabilnosti metodama granične ravnoteže i konačnih elemenata. Na ovaj način određen je faktor sigurnosti, kao i pomeranja konstrukcije. 2. GEOLOŠKA GRAĐA I ISTRAŽIVANJA TERENA 2.1. Strukturno-geološke karakteristike terena u zoni ...
... the right bank of the river with the the vertical clifF (approx. 40 m high) where the Old town is located. Geotechnical model of the limestone rock mass and joint network model are formed by utilization of drone photogrammetry. The tensile force (approx. 30 MN) induced on the bridge pillar should ...Zoran Berisavljević, Miloš Marjanović, Uroš Đurić. "Geotehnički aspekti izgradnje visećeg pešačkog mosta u Starom gradu u Užicu" in Zbornik radova / Međunarodno naučno-stručno savetovanje Geotehnički aspekti građevinarstva i zemljotresno inženjerstvo, Vrnjačka banja, 1-3. novembar 2023., Beograd : Savez građevinskih inženjera Srbije (2023.)
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Multi-Criteria Fuzzy-Stochastic Diffusion Model of Groundwater Control System Selection
When considering data and parameters in hydrogeology, there are often questions of uncertainty, vagueness, and imprecision in terms of the quantity of spatial distribution. To overcome such problems, certain data may be subjectively expressed in the form of expert judgment, whereby a heuristic approach and the use of fuzzy logic are required. In this way, decision-making criteria relating to an optimal groundwater control system do not always have a numerical value. Groundwater control scenarios (alternatives) are identified through hydrodynamic ...expert judgment, linguistic variables, fuzzy dynamic TOPSIS, hydrogeology, groundwater control system, open-cast mine, geometric Brownian motionDušan Polomčić, Zoran Gligorić, Dragoljub Bajić, Miloš Gligorić, Milanka Negovanović. "Multi-Criteria Fuzzy-Stochastic Diffusion Model of Groundwater Control System Selection" in Symmetry, MDPI AG (2019). https://doi.org/10.3390/sym11050705
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Евалуација утицаја успора ХЕ "Ђердап 1" на формирање режима подземних вода у приобаљу Дунава
Predrag R. PAJIĆ (2016)Predrag R. PAJIĆ. Евалуација утицаја успора ХЕ "Ђердап 1" на формирање режима подземних вода у приобаљу Дунава, Beograd:Rudarsko Geološki Fakultet, 2016
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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 ...... 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 ...
... optimalne proizvodnje na naftnom polju Amal;New model for achieving optimum production at Amal oilfield. | Elnori Elmabrouk Ali Elhaddad | Универзитет у Београду | 2015-04-16 | | http://dr.rgf.bg.ac.rs/s/repo/item/0003950 Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду омогућава ...
... publications. - The Repository is available at: www.dr.rgf.bg.ac.rs UNIVERZITET U BEOGRADU RUDARSKO GEOLOŠKI FAKULTET Elnori Elmabrouk Ali Elhaddad NOVI MODEL ZA POSTIZANJE OPTIMALNE PROIZVODNJE NA NAFTNOM POLJU AMAL doktorska disertacija ...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 ...... 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 ...
... optimalne proizvodnje na naftnom polju Amal;New model for achieving optimum production at Amal oilfield. | Elnori Elmabrouk Ali Elhaddad | Универзитет у Београду | 2015-04-16 | | http://dr.rgf.bg.ac.rs/s/repo/item/0003985 Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду омогућава ...
... publications. - The Repository is available at: www.dr.rgf.bg.ac.rs UNIVERZITET U BEOGRADU RUDARSKO GEOLOŠKI FAKULTET Elnori Elmabrouk Ali Elhaddad NOVI MODEL ZA POSTIZANJE OPTIMALNE PROIZVODNJE NA NAFTNOM POLJU AMAL doktorska disertacija ...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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Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)
A groundwater flow model was developed to simulate groundwater extraction from the public water supply source of the City of Kikinda. The hydrodynamic model includes the municipal groundwater source of Kikinda (Šumice and the Jezero Well), but also an extended area where there are groundwater sources that provide water supply to three factories: (MSK, TM and LŽT - Kikinda). Hydrodynamic modeling, based on the numerical method of finite differences will show the groundwater balance of the sources in the ...... comprised of semi-permable and impermeable sediments. Figure 4. 3D hydrogeological model of the groundwater source of Šumice, 230o azimuth section HYDRODYNAMIC MODEL The concept of the hydrodynamic model of the groundwater sources that provide water supply to Kikinda is based on the ...
... Kikinda (manufacturer of industrial machinery). The tree-dimensional (3D) finite-difference numerical model for the present study was developed using Modflow [20] with Groundwater Vistas as the graphical user interface [21]. The model encompassed an area of 6 km × 6 km and a depth of 300 m. Its orientation ...
... 10-3 8.5 × 10-3 1995 CONCEPTUAL (HYDROGEOLOGICAL) MODEL The conceptual model of the hydrogeological system is based on geological information on the boreholes (Figure 2) and water-level fluctuations in observation wells. The conceptual model was designed according to the actual groundwater flow ...Dušan Polomčić, Dragoljub Bajić, Jelena Zarić. "Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)" in Journal of Sustainable Development of Energy, Water and Environment Systems (2015). https://doi.org/10.13044/j.sdewes.2015.03.0017
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Regional rockfall exposure assessment, experience from Serbia
Rockfalls are common in hilly and mountainous areas, especially along roads with engineered slopes and cuts. Such is the case for most of the state and local road routes in Central, Serbia, which was the subject in this case study. A road network of 276 km covering roughly 1700 km2 between the cities of Kraljevo, Čačak and Ivanjica is presented. Assessing of such wide areas needs to be conducted from large to site-specific scale, i.e., using GIS spatial tools ...Miloš Marjanović, Biljana Abolmasov, Uroš Đurić, Jelka Krušić, Snežana Bogdanović. "Regional rockfall exposure assessment, experience from Serbia" in 5th Regional symposium on landslides in Adriatic–Balkan Region, 23-26 March 2022, Faculty of Civil Engineering, University of Rijeka and Faculty of Mining, Geology and Petroleum Engineering, University of Zagreb (2022)
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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)
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A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor
Miloš Milenković, Miloš Gligorić, Nebojša Bojović, Zoran Gligorić. "A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor" in Transportation Planning and Technology, Informa UK Limited (2023). https://doi.org/10.1080/03081060.2023.2245389
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Application of geophysical and multispectral imagery data for predictive mapping of a complex geo-tectonic unit: a case study of the East Vardar Ophiolite Zone, North-Macedonia
... the model that employs all 13 features, which is deemed the overall better model, requires approxi- mately 55% more computational time than the model that employs the same dataset but only the five most informative features. To fully quantify the performance of the RF_C_100_5MI model, a ...
... to train and test the KNN model using only the five most informative features, as it operates more efficiently on lower dimensional data (i.e., with fewer features), it was ultimately exceeded by the RF model. However, in contrast to the KNN model, the RF model exhibits mode robustness towards ...
... fault map, digi- tal elevation model, and BR3 map are the most significant features for predicting ophiolites. The statistical metrics of the model that incorporated all 13 features were better. However, the RF model that employed all features and the model that utilized only the five most ...Filip Arnaut, Dragana Đurić, Uroš Đurić, Mileva Samardžić-Petrović, Igor Peshevski. "Application of geophysical and multispectral imagery data for predictive mapping of a complex geo-tectonic unit: a case study of the East Vardar Ophiolite Zone, North-Macedonia" in Earth Science Informatics, Springer Science and Business Media LLC (2024). https://doi.org/10.1007/s12145-024-01243-4
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Uticaj geološke neizvesnosti u razvoju rudarskih projekata
Rudarstvo je industrija koja se nosi sa različitim vrstama neizvesnosti i rizika zbog svoje prirode i specifičnosti. Neizvesnost u rudarstvu može poticati iz različitih izvora i uticati na različite aspekte rudarskih projekata. Kao jedan od dominantnih faktora, ističe se geološka neizvesnost. Geološka neizvesnost igra ključnu ulogu u rudarstvu i može značajno uticati na procenu resursa i rezervi, planiranje eksploatacije, ekonomsku isplativost i upravljanje rizicima. Ova neizvesnost se ne može eliminisati, ali se uz primenu adekvatnih standarda i zakona može ...... kontrola podataka, • Geološka interpretaciju ı modeliranje, • Analizaiprocena sadržaja,i • Procenai kontrola rizika. Procena resursa treba da bude kompletirana sa procenom rizika. Svi numerički modeli imaju višestruke značajne izvore rizika, vezane za podatke, geološku interpretaciju i modeliranje ...
... opsegu će se kretati NPV rudarskog projekta, pod pretpostavkom da je geološka interperetacija ležišta adekvatna i da je zapreminska masa u blok modelu utvrđena sa velikom tačnošću. Raspoloživost višestrukih jednako verovatnih modela ležišta, omogućuje rudarskim inženjerima (projektantima) da povežu ...
... Stevanović D. (2015). Optimizacija i planiranje površinskih kopova stohastičkim modelima. Belgrade: Univerzitet u Beogradu, Rudarsko-geološki fakultet. [22] Vukaš R. (2018). Prikaz podataka o kategorijama ukupnih (geoloških) rezervi urana u Srbiji u klasama mineralnih resursa iz aktuelne zakonske regulative ...Petar Marković, Dejan Stevanović, Mirjana Banković. "Uticaj geološke neizvesnosti u razvoju rudarskih projekata" in XI Međunarodna konferencija "Ugalj i kritični minerali 2023", CCM 2023, Zlatibor, 11-14. oktobar 2023., Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)
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VENTEX: An Expert System for Mine Ventilation Systems Analysis
Analiza sistema za ventilaciju je komleksan proces, koji bazira na proračunu brojnih parametara, koji se odnose na: stanje mreže, provetrenost, stabilnost sistema, gubitke vazduha, klimatske uslove, gasno stanje, ugroženost od požara i opasne prašine. Navedeni problemi se uspešno rešavaju paketom SimVent, ali potpuno razumevanje i korišćenje dobijenih rezultata zahteva angažovanje iskusnog specijaliste iz oblasti ventilacije. Rešenje je nađeno u kreiranju ekspertnog sistema VENTEX, čija je baza znanja formalizacija ekspertskog znanja iz oblasti ventilacije rudnika. U radu je prikazana metodologija ...... in OOA model Figure 1. Modified Coad-Yourdon object The strategy for evaluation of the general ventilation state of the mine is formally represented using a modification of the Coad- Yourdon object-oriented analysis (OOA) model (Coad and Yourdon, 1991). In the classical model every real ...
... knowledge, this model was modified by including a new (fourth) element, featuring the production (IF-THEN) rules related to an object in the model /Fig. 1/. Thus both the procedural and declarative knowledge related to a class object could be represented. Such a modified OOA model was the used ...
... can be either classes or instances within classes. The relationships among the objects in a model can be represented by linking them together into a hierarchical structure. Thus the modified OOA model based on the strategy for evaluation of the general ventilation state of the mine could be ...Ranka Stanković, Nikola Lilić, Ivan Obradović. "VENTEX: An Expert System for Mine Ventilation Systems Analysis" in YU Info '96 Brezovica, Društvo za informacione sisteme i računarske mreže (1996)
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A Fuzzy Expert Model for Availability Evaluation
Each technical system within itself carries the great potential danger of possible occurrence of failure and damages. Mining machines are characteristic by great investment values, costs of unplanned shutdowns, complex working conditions, and environment and workers hazards. Systematic monitoring of the mining machinery is of great importance for the management of the mining companies. Availability is the overall concept of quality of service. Includes information regard to operating state, an idle state, a standby state and shut down. The ...... Измењено: 2023-10-14 04:10:15 A Fuzzy Expert Model for Availability Evaluation Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] A Fuzzy Expert Model for Availability Evaluation | Dejan Ivezić, Miloš ...
... III. AVAILABILITY ASSESSMENT MODEL Figure 1 shows the conceptual model of the expert system for availability (A) evaluation based on fuzzy interference of reliability (R), maintainability (M) and supportability (S) input data. Input data are introduced to a model based on experts’ opinions. ...
... but requires specific, quite complex IT system. Therefore, in this paper, an expert model, that integrates reliability, maintainability, and supportability in the measure of availability is proposed. This model is based on fuzzy sets theory and it is implemented to three types of bulldozers that ...Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić. "A Fuzzy Expert Model for Availability Evaluation" in Proceedings of the 2019 20th International Carpathian Control Conference (ICCC), AGH University of Science and Technology, Kraków - Wieliczka, Poland (2019)
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Rezultati ispitivanja parametara čvrstoće i dinamičkih svojstava mermera i mogućnost njihove korelacije
Ispitivanja stena kao radne sredine, odnosno materijala sa kojim se gradi, na kome se gradi i u kome se gradi, svojom složenošću zahteva njeno svestrano izučavanje po velikom broju parametara. Zadatak Mehanike stena je da što bolje upozna ponašanje stenske mase i njenu otpornost na dejstvo pritiska, zatezanja i smicanja, kao i dinamičkih svojstava. Poznavanje navedenih parametara i njihova korelacija omogućavaju pouzdaniji izbor parametara za projektovanje danas sve zahtevnijih uslova kako podzemne, tako i površinske eksploatacije. U ovom radu ...mermer, jednoosna čvrstoća na pritisak, čvrstoća na istezanje, brzina longitudinalnih elastičnih talasa, korelacijaJelena Majstorović-Necković, Vladimir Čebašek, Veljko Rupar. "Rezultati ispitivanja parametara čvrstoće i dinamičkih svojstava mermera i mogućnost njihove korelacije" in 11. Međunarodna konferencija “Ugalj i kritični materijali" CCM 2023, Zlatibor, 11-14. oktobar 2023., Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)
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Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine
... (1973) Teorijska statistika. Beograd: Naučna knjiga. 2 LUTOVAC, S. (2010) Model određivanja parametara zakona oscilovanja stenske mase pri miniranju. Doktorska disertacija, Univerzitet u Beogradu - Rudarsko-geološki fakultet. 3 Медведев, С.В. 1964) Сеисмика горных взрывов. Москва: Недра. ...
... by experimental measurements. Determination of parameters by model 1 The smallest square method is mainly used to obtain the parameters K and n which represents a common model (Simeunović, 1985). Determination of parameters by model 2 Proceeding from the rock mass oscillation law from the equation ...
... ležišta. Za određivanje parametara u jednačini Sadovskog, pored uobičajene metode najmanjih kvadrata primenjen je još jedan model. Pri tom je konstatovano da se oba modela mogu koristiti za izračunavanje brzine oscilovanja stenske mase. Ključne reči: radna sredina, miniranje, seizmičko dejstvo ...Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina. "Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine" in Underground Mining Engineering, Belgrade : University of Belgrade, Faculty of Mining and Geology (2015). https://doi.org/10.5937/podrad1526009L
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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)... integrated fuzzy model for mine management optimization Miodrag Čelebić, Sanja Bajić, 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 ...
... to facilitate decision making with a fuzzy optimization model. Scores are entered and pairs compared in the application, and otherwise extensive mathematical calculations are simplified. It is also easy to monitor the sensitivity of the model to input parameter variation. On a much higher level ...
... Comptes rendus de PAcadćmie bulgare des Sciences Tome 76, No 9, 2023 ENGINEERING SCIENCES Mining engineering DEVELOPMENI OF IN TEGRATED FUZZY MODEL FOR MINE MANAGEMENT OPTIMIZATION Miodrag Čelebić*, Sanja Bajić**, Dragoljub Bajić***", Dejan Stevanović**, Duško Torbica*, Vladimir Malbašić* ...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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Развој модела употребног квалитета помоћне механизације на површинским коповима лигнита
Драгица Јагодић Крунић (2021)Тренутно стање помоћне механизације на површинским коповима лигнита је незадовољавајуће узроковано пре свега старошћу и неблаговременом заменом машима услед чега је расположивост недовољна а трошкови експлоатације и одржавања високи. Тренутно стање и захтеви који се постављају пред ове машине указују на неопходност оптимизације процеса управљања помоћном механизацијом. Одређивање оптималног времена замене и преосталих могућности је најодговорнији управљачки задатак који треба да буде заснован на свеобухватном сагледавању економских, техничких и других узрочно последичних веза. Са економског аспекта гледано треба одржавати ...помоћна механизација, употребни квалитет, ефективност, расположивост, сигурност функционисања, ризик, трошкови животног циклуса, фази логика, Монте Карло метода... обављање следећих радова: израда истражних геолошких структурних, хидрогеолошких и геомеханичких бушотина, дренажних бунара за одводњавање површинских копова, бунара за водоснабдевање, пијезометарских бунара, минских бушотина, радова за потребе геофизичких и геомеханичких истраживања и радова сличне ...
... Измењено: 2023-10-14 04:17:02 Развој модела употребног квалитета помоћне механизације на површинским коповима лигнита Драгица Јагодић Крунић Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Развој модела употребног квалитета помоћне механизације на ...
... employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs УНИВЕРЗИТЕТ У БЕОГРАДУ РУДАРСКО-ГЕОЛОШКИ ФАКУЛТЕТ Драгица Д. Јагодић Крунић РАЗВОЈ МОДЕЛА УПОТРЕБНОГ КВАЛИТЕТА ПОМОЋНЕ МЕХАНИЗАЦИЈЕ НА ПОВРШИНСКИМ КОПОВИМА ЛИГНИТА Докторска дисертација ...Драгица Јагодић Крунић. Развој модела употребног квалитета помоћне механизације на површинским коповима лигнита, Београд : [Д. Јагодић Крунић], 2021