Претрага
2354 items
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Development of the Cost-Based Model for Monitoring the Lifetime of the Earth Moving Machines
This paper presents the model for the identification of reference points on the lifetime curve of engineering systems. This curve commonly represents the increase and decline of failure in relation to time. A direct correlation between failure rate and costs is assumed in this paper, therefore, statistical and empirical analysis of costs provided reference points. This approach is used for positioning stages of the engineering system’s lifetime with a minimal number of failures and costs, regardless of whether these ...Electrical and Electronic Engineering,Industrial and Manufacturing Engineering, Control and Optimization, Mechanical Engineering, Computer Science (miscellaneous), Control and Systems EngineeringUgljesa Bugarić, Milos Tanasijević, Stevan Djenadić, Dragan Ignjatović, Ivan Janković. "Development of the Cost-Based Model for Monitoring the Lifetime of the Earth Moving Machines" in Machines, MDPI AG (2022). https://doi.org/10.3390/machines10110995
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Optimizacija i planiranje površinskih kopova stohastičkim modelima
Dejan R. Stevanović (2015-05-29)Savremeno rudarstvo izloženo je stalnom trendu pogoršanja uslova poslovanja.Mogućnost ostvarenja ekonomskih i drugih ciljeva rudarskog projektakompromitovana je stalnim pogoršanjem kvaliteta ležišta na kojima se vršieksploatacija, kao i značajnoj dozi neizvesnosti povezane sa geološkim,ekonomskim i tehničkim parametrima proizvodnje. U ovako kompleksnimuslovima poslovanja, matematički modeli sposobni da odgovore značajnimizazovima, odnosno ponude optimalna rešenja kojima se garantuje maksimalnoispunjenje projektovanih ciljeva, nameću se kao neophodnost.Trenutni, konvencionalni pristup optimizaciji i planiranju površinskih kopovazasniva se na algoritmima, razvijenim sredinom prošlog veka čije je opšteobeležje deterministički ...površinski kop, planiranje, optimizacija, stohastički modeli, kontrola kvaliteta uglja, neizvesnost.... is hybrid type. It has stochastic (Monte Carlo method) and deterministic component and treats the problem of optimization of open pit boundaries. Keywords: open pit mine, planning, optimization, stochastic models, coal quality control, uncertainty. Scientific field: Mining Engineering ...
... orebodies. Orebody Modelling and Strategic Mine Planning, The Australasian Institute of Mining. 231 Braticevic, D, B, 1983, Open Pit Optimization Method, XVIII APCOM, Institute of Mining and Metallurgy, London, England Caccetta, L. and Hill, S.P., 2003, An application of branch and cut to open pitmine ...
... modelima;Open pit mine optimization and planning with stochastic models Dejan R. Stevanović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Optimizacija i planiranje površinskih kopova stohastičkim modelima;Open pit mine optimization and planning with stochastic ...Dejan R. Stevanović. "Optimizacija i planiranje površinskih kopova stohastičkim modelima" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2015-05-29)
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Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software
The development of modern technologies has enabled the application of specialized softwares in the field of mining through various segments and processes, including in works related to drilling and blasting. The application of specialized software for drilling and blasting with the use of modern technologies such as photogrammetry enabled more accurate data from the field for later processing. By processing data and creating a 3D model of the terrain for drilling and blasting works, it can obtain precise data, ...Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić. "Optimization and Analysis of Drilling and Blasting Parameters Using O-Pitblast Software" in Podzemni radovi, Beograd : Rudarsko-geološki fakultet (2024)
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Definition of criteria and alternatives for choosing the optimal mining method deposits when applying multi: Criteria optimization, Belgrade, June 2024
Sanja Bajić, Dragoljub Bajić, Branko Gluščević, Radmila Gaćina, Josip Išek. "Definition of criteria and alternatives for choosing the optimal mining method deposits when applying multi: Criteria optimization, Belgrade, June 2024" in Podzemni radovi, Beograd, jun 2024, Centre for Evaluation in Education and Science (CEON/CEES) (2024). https://doi.org/10.5937/podrad2444071B
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Mine ventilation system planning using genetic algorithms
The most common problem in contemporary mining practice related to the planning and analysis of ventilation systems is the optimization of partially regulated air distribution in mine ventilation networks. This paper presents a two step optimization procedure for partly regulated air distribution in mine ventilation networks. The first step is the determination of air distribution in all branches using the well known Hardy-Cross method. In the second step the distribution and parameters of air flow regulators with minimum engaged ...coal, lignite, and peat; ventilation systems; coal mining; underground mining; ventilation; mathematical models; design; air flow; optimization; calculation methodsNikola Lilić, Ranka Stanković, Ivan Obradović. "Mine ventilation system planning using genetic algorithms" in 6. international symposium on mine planning and equipment selection, Ostrava (Czech Republic), 3-6 Sep 1997, A.A. Balkema, Rotterdam (Netherlands) (1997)
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Development of an integrated model for open-pit-mine discontinuous haulage system optimization
Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović (2024)Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović . "Development of an integrated model for open-pit-mine discontinuous haulage system optimization" in Sustainability, MDPI (2024). https://doi.org/10.3390/su16083156
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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)... proposed fuzzy optimization methodology was applied considering, the above criteria and options. The calculations were made in a specially developed FUZZY-GWCS program [10], and the input elements were numerical values of linguistic variables. Table 1 shows the criteria matrix values and the calculated ...
... criteria are analyzed and evaluated using, a scale of relative importance. On the other hand, mathematical optimization calculations are performed apply- ing the fuzzy analytic hierarchy process FAHP [3 r)] to select the optimal mining; echnology. The great advantage of fuzzy logic and heuristic methods ...
... structures and the physical and mechanical properties of rocks. In such circumstances, engineer experience is especially im- portant. Several interesting studies addressing, the fuzzy logic concept in mining; are reported in | Š}, 'The integrated fuzzy model for mining: technology optimization was applied ...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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Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station “Bezdan 1”, Serbia
Dragoljub Bajić, Dušan Polomčić (2014)A groundwater control system was designed to lower the water table and allow the pumping sta-tion “Bezdan 1” to be built. Based on a hydrodynamic analysis that suggested three alternative solutions, mul-ticriteria optimization was applied to select the best alternative. The fuzzy analytic hierarchy process methodwas used, based on triangular fuzzy numbers. An assessment of the various factors that influenced the selec-tion of the best alternative, as well as fuzzy optimization calculations, yielded the “weights” of the alternativesand the ...groundwater lowering, groundwater management scenario, fuzzy analytic hierarchy process,expert knowledge, triangular fuzzy numbers, linguistic variables... alternative. Results and Discussion The fuzzy extent analysis and the analytic hierar- chic process described above were applied to develop a decision-making model and select the best alterna- tive for the groundwater control system of the “Be- zdan 1” PS. Fuzzy optimization calculations included ...
... linguistic or fuzzy variable is Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station “Bezdan 1”, Serbia DRAGOLJUB BAJIĆ1 & DUŠAN POLOMČIĆ2 Abstract. A groundwater control system was designed to lower the water table and allow the pumping sta- tion “Bezdan ...
... management, dewatering and groundwater control, etc. (AZARNI- VAND et al. 2004; SINGH et al. 2007; UDDAMERI et al. 2014; KARNIB 2014 ). One branch of fuzzy logic applied in hydrogeology is fuzzy optimization. The present paper describes an application of multicriteria fuzzy optimization - the so-called fuzzy ...Dragoljub Bajić, Dušan Polomčić. "Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station “Bezdan 1”, Serbia" in Geološki anali Balkanskoga poluostrva, Belgrade : University of Belgrade - Faculty of mining and geology (2014). https://doi.org/10.2298/GABP1475103B
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Gas-lift wells optimization at the oil field "K"
Dušan Danilović, Marija Ilić, Miroslav Crnogorac, Lola Tomić. "Gas-lift wells optimization at the oil field "K"" in Podzemni radovi, University of Belgrade - Faculty of Mining and Geology (2022). https://doi.org/10.5937/podrad2241031D
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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)Technoeconomic, environmental and safety criteria generally affect the management of metallic and non-metallic mining operations. The first basic question that needs to be addressed when planning ore mining is which methods are adequate and what is the optimal mining technology? Due to the complex geologic framework of ore deposits, geological exploration has rendered synonymous the inherent uncertainties, vagueness, and inaccuracies. As a result, subjective evaluation by engineers and expert experience have become increasingly important. Given that the natural language ...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, Bulgarian Academy of Sciences (2023). https://doi.org/10.7546/CRABS.2023.09.12
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Побољшање ефикасности одлучивања у рударству применом линеарних оптимизационих модела
Трајче Бошевски (2021)Одлучивање и управљање у рударству је захтеван и сложен задатак изложен ризицима. Конвенционални-искуствени приступи доношења одлука, у пракси често показују слабост која се огледа у недовољној поузданости и прецизности. Предмет истраживања докторске дисертације, под називом „Побољшање ефикасности одлучивања у рударству применом линеарних оптимизационих модела“ је да, сагледавањем научних метода линеарног програмирања, приступи формирању локацијских модела који би били засновани на анализи и прилагођавању постојећих и увођењу нових претпоставки за случајеве као што је експлоатација и потрошња кречњака. У дисертацији ......500 Internal Server Error Internal Server Error
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...Трајче Бошевски. Побољшање ефикасности одлучивања у рударству применом линеарних оптимизационих модела, [Т. Бошевски], 2021
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Fragmentation Size Prediction of Blasted Material Using a Specialized Software for Drilling and Blasting
Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić, Miljan Gomilanović (2024)Design and optimizing the drilling and blasting parameters, should fill the requirements for the capacity, fragmentation size, and technical characteristics of loading and transport equipment, and enable a safe work at the open pit. Besides mentioned, it also achieves the minimal impact on the environment of the open pit and decreases the negative effects on the environment, especially in the blast vibration and flyrock. To obtain the best possible blasting effects and consider all the factors, a specialized software is ...Stefan Milanović, Nikola Simić, Lazar Kričak, Milanka Negovanović, Nikola Đokić, Miljan Gomilanović. "Fragmentation Size Prediction of Blasted Material Using a Specialized Software for Drilling and Blasting" in The 55th International October Conference on Mining and Metallurgy, Mining and Metallurgy Institute Bor (2024). https://doi.org/10.5937/IOC24077M
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Preliminary management and optimization of a gas reservoir in central Serbia
Karović-Maričić Vesna, Danilović Dušan (2010)Karović-Maričić Vesna, Danilović Dušan. "Preliminary management and optimization of a gas reservoir in central Serbia" in Journal of Petroleum Science and Engineering no. 70, 1-2, London-Amsterdam -New York:Elsevier (2010): 107-113
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Analysis of Household Coal Consumption in Serbia Based on Grey System Theory and K - means Clustering (Base for Network Optimization)
Gligorić Zoran, Gligorić Miloš, Štrbac-Savić Svetlana. "Analysis of Household Coal Consumption in Serbia Based on Grey System Theory and K - means Clustering (Base for Network Optimization)" in 1st Virtual International Conference on Science, Niš:Research and Development Center ALFATEC (2015): 45-48
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Probabilistic analysis of anisotropic rock slope with reinforcement measures
During the construction of E75 highway through Grdelica gorge in Serbia, a major failure occurred in the zone of reinforced rock slope. Excavation was performed in highly anisotropic Paleozoic schist rock formation. The reinforcement consisted of the two rows of micropile wall with pre-stressed anchors. Forces in anchors were monitored with load cells while benchmarks were installed for superficial displacement measurements. The aim of the study is to investigate possible causes of instability considering different probability distributions of the ...Zoran Berisavljević, Dušan Berisavljević, Miloš Marjanović, Svetlana Melentijević. "Probabilistic analysis of anisotropic rock slope with reinforcement measures" in Geomechanics and Engineering (2023). https://doi.org/10.12989/gae.2023.34.3.285
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Fuzzy linear model for production optimization of mining systems with multiple entities
Slobodan Vujić, Tomo Benović, Miljanović Igor, Hudej Marjan, Milutinović Aleksandar, Pavlović Petar (2011)Slobodan Vujić, Tomo Benović, Miljanović Igor, Hudej Marjan, Milutinović Aleksandar, Pavlović Petar. "Fuzzy linear model for production optimization of mining systems with multiple entities" in International Journal of Minerals, Metallurgy and Materials 18 no. 6, -:University of Science and Technology Beijing, PR China (2011): 633-637. https://doi.org/10.1007/s12613-011-0488-8
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Long-term planning methodology for improving wood biomass utilization
The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković. "Long-term planning methodology for improving wood biomass utilization" in Energy, Elsevier BV (2019). https://doi.org/10.1016/j.energy.2019.03.105
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An example of groundwater modeling to predict impact of climate change and to support optimization of a new intake
Polomčić Dušan, Stevanović Zoran, Ristić-Vakanjac Vesna, Dokmanović Petar, Milanović Saša. "An example of groundwater modeling to predict impact of climate change and to support optimization of a new intake" in Proceedings of EGU 2012 - Geophysical Research Abstract, Vol 14, 22-27.04. Vienna, Vienna: (2012): 4971-4971
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Waste Dump Design Optimization, Case Study Open Pit Drmno
Stevanović Dejan, Banković Mirjana, Rupar Veljko, Milisavljević Vladimir, Cvjetić Aleksandar, Kržanović Daniel (2017)Stevanović Dejan, Banković Mirjana, Rupar Veljko, Milisavljević Vladimir, Cvjetić Aleksandar, Kržanović Daniel. "Waste Dump Design Optimization, Case Study Open Pit Drmno" in Mining and Environmental Protection, 6th International Symposium, MEP 17, Vrdnik, 21-24 June 2017, Beograd:University of Belgrade, Faculty of Mining and Geology (2017): 282-286
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Optimization of photoluminescence of Y2O3:Eu and Gd2O3:Eu phosphors synthesized by thermolysis of 2,4-pentanedione complexes
Antić Bratislav, Rogan Jelena, Kremenović Aleksandar, Nikolić Aleksandar S., Vučinić-Vasić Milica, Božanić Dušan K., Goya Gerardo F., Colomban Philippe (2010)Antić Bratislav, Rogan Jelena, Kremenović Aleksandar, Nikolić Aleksandar S., Vučinić-Vasić Milica, Božanić Dušan K., Goya Gerardo F., Colomban Philippe. "Optimization of photoluminescence of Y2O3:Eu and Gd2O3:Eu phosphors synthesized by thermolysis of 2,4-pentanedione complexes" in Nanotechnology 24 no. 21, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND:IOP Publishing LTD (2010). https://doi.org/10.1088/0957-4484/21/24/245702