Претрага
334 items
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Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series
Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić (2021)Underground mining engineers and planners in our country are faced with extremely difficult working conditions and a continuous shortage of money. Production disruptions are frequent and can sometimes last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. ...deformacije podgrade, lasersko skeniranje, višekanalna singularna spektralna analiza, prognoza, klasterisanje fuzzy vremenskih serija... interventions and an optimal understanding of the deformation behavior of the rock mass. Bao-Zhen Yao et al. [11] has presented a multi-step-ahead prediction model, based on a support vector machine, for tunnel surrounding rock displacement forecasting. This paper is divided into five sections. In the ...
... two-dimensional support to an artificial one-dimensional support. The position of the marker m ( → v , t ) , induced by rock stress, changes according to the following vector equation (Figure 2): → v (t) = → v (t− 1) + → u (t), t = 1, 2, . . . , N , (1) where → v (t)—the position vector of the marker ...
... 14, 3710 20 of 20 References 1. Xu, D.P.; Feng, X.T.; Cui, Y.J.; Jiang, Q. Use of the equivalent continuum approach to model the behaviour of a rock mass containing an interlayer shear weakness zone in an underground cavern excavation. Tunn. Undergr. Space Technol. 2015, 47, 35–51. [CrossRef] 2. Armaghani ...Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić. "Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series" in Energies, MDPI (2021). https://doi.org/https://doi.org/10.3390/en14123710
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Application of the Fuzzy Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine
Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić (2021)The production of lignite in large open-pit mines is mainly performed with continuously operating equipment, where bucket-wheel excavators, bucket-chain excavators, belt conveyors, and spreaders are the basic machines. Smaller machines, usually of discontinuous operating nature, are commonly categorized as auxiliary machines. This paper presents the research related to the analysis of auxiliary machine parameters with the case study for a hydraulic excavator. The purpose of the analysis was to develop a model of rating quality of service of the ...Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić. "Application of the Fuzzy Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine" in SSRN Electronic Journal, Elsevier BV (2021). https://doi.org/10.2139/ssrn.3945617
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Termička zrelost organske supstance i naftno-matični potencijal istočne Hercegovine
Nikoleta Aleksić (2021)Cilj istraživanja, obrade i interpretacije rezultata prikazanih u disertaciji je utvrđivanje termičke zrelosti organske supstance i naftno-matičnog potencijala sedimentnih stena na području istočne Hercegovine, primenom metoda pirolize Rock-Eval, organo-petrografskog proučavanja organske supstance u normalnoj svetlosti i fluorescenciji, koja je pored kvalitativne analize uključila posebno i refleksiju vitrinita. Osim toga, na osnovu organsko-geohemijskih analiza sagledane su karakteristike i poreklo ekstrahovanog bitumena metodom gasne hromatografije - masene spektrometrije, pri čemu su izvršene analize biomarkera kao geohemijskih indikatora. Tokom rada na doktorskoj ...organska supstanca, termička zrelost, matične stene, naftni potencijal, refleksija vitrinita, piroliza Rock-Eval, biomarkeri, Karbonatna platforma, istočna HercegovinaNikoleta Aleksić. Termička zrelost organske supstance i naftno-matični potencijal istočne Hercegovine, Beograd : [N. Aleksić], 2021
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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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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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Blast-induced damage and its impact on structural stability of underground excavations
Slavko Torbica, Veljko Lapcevic (2017)Slavko Torbica, Veljko Lapcevic. "Blast-induced damage and its impact on structural stability of underground excavations" in Podzemni radovi (2017). https://doi.org/10.5937/podrad1629033T
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Estimating extent and properties of blast-damaged zone around underground excavations
Slavko Torbica, Veljko Lapčević (2015)Slavko Torbica, Veljko Lapčević. "Estimating extent and properties of blast-damaged zone around underground excavations" in Rem: Revista Escola de Minas, FapUNIFESP (SciELO) (2015). https://doi.org/10.1590/0370-44672015680062
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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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A variant of two-step optimal fourth-order iterative method for solving nonlinear equation
Ralević Nebojša, Ćebić Dejan (2014)Ralević Nebojša, Ćebić Dejan. "A variant of two-step optimal fourth-order iterative method for solving nonlinear equation" in IEEE 12th International Symposium on Intelligent Systems and Informatics (SISY) (2014): 149-153. https://doi.org/10.1109/SISY.2014.6923575
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On the optimality of some multi-point methods for finding multiple roots of nonlinear equation
Ralević Nebojša, Ćebić Dejan (2016)Ralević Nebojša, Ćebić Dejan. "On the optimality of some multi-point methods for finding multiple roots of nonlinear equation" in Nonlinear Analysis: Modelling and Control 21 no. 1 (2016): 121-134
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The third order mean-based Jarratt-type method for finding simple roots of nonlinear equation
Ralević Nebojša, Ćebić Dejan, Pavkov Ivan. "The third order mean-based Jarratt-type method for finding simple roots of nonlinear equation" in IEEE 13th International Symposium on Intelligent Systems and Informatics (SISY) (2015): 123-126. https://doi.org/10.1109/SISY.2015.7325364
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A Variant of Sharma-Aroras Optimal Eighth-Order Family of Methods for Finding A Simple Root of Nonlinear Equation,
Ćebić Dejan, Paunović Marija, Ralević Nebojša. "A Variant of Sharma-Aroras Optimal Eighth-Order Family of Methods for Finding A Simple Root of Nonlinear Equation," in IEEE 16th International Symposium on Intelligent Systems and Informatics (SISY) (2018): 81-96. https://doi.org/ 10.1109/SISY.2018.8524857
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A new optimal family of three-step methods for efficient finding of a simple root of a nonlinear equation
Ralević Nebojša, Ćebić Dejan (2016)Ralević Nebojša, Ćebić Dejan. "A new optimal family of three-step methods for efficient finding of a simple root of a nonlinear equation" in Mathematical Communications 21 (2016): 189-197
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Characterization of the eastern Suva Planina Mt. karst aquifer (SE Serbia) by time series analysis and stochastic modelling
Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeBranislav Petrović, Veljko Marinović, Zoran Stevanović. "Characterization of the eastern Suva Planina Mt. karst aquifer (SE Serbia) by time series analysis and stochastic modelling" in Environmental Earth Sciences, Springer Science and Business Media LLC (2023). https://doi.org/10.1007/s12665-023-10911-5
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Verification of catchment size using the water balance equation
Ristić Vakanjac Vesna, Marinović Veljko, Nikić Zoran, Polomčić Dušan, Čokorilo Ilić Marina, Bajić Dragoljub (2016)Ristić Vakanjac Vesna, Marinović Veljko, Nikić Zoran, Polomčić Dušan, Čokorilo Ilić Marina, Bajić Dragoljub. "Verification of catchment size using the water balance equation" in Proceedings of the 3rd Congress of Geologists of Republic Macedonia, Struga: (2016): 191-198
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Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential
The study presented in this paper assessed the multidisciplinary approach of geothermal potential in the area of the most southeastern part of the Pannonian basin, focused on resources utilization. This study aims to present a method for the cascade use of geothermal energy as a source of thermal energy for space heating and cooling and as a resource for balneological purposes. Two particular sites were selected—one in a natural environment; the other within a small settlement. Geothermal resources come ...геотермална енергија, Панонски басен, геотермална каскада, енергетска ефикасност, бањски центри, балнеологија, биоклиматска архитектура, стратегије пасивног дизајнирања, модуларни објекти... which means that they can operate year-round in but with greater variation in capacity, while the ones with low seasonal sensitivity show less oscillation in seasonal use. In both cases, more demand on weekends than on weekdays can be expected. The modular approach presented in this paper addresses ...
... the glazed façade of the long corridor can be open along the intermediate semi-atrium spaces. Thermal mass and materials: The modules are designed as lightweight structures where a low thermal mass optimizes comfort and energy efficiency in intermittently used spaces. Enhanced thermal insulation and ...
... Banatsko Veliko Selo site. Appl. Sci. 2021, 11, 2691 12 of 24 The thermal power availability for the both geothermal sites can be calculated as in Equation (1) E = H×Q × ∆T (1) where E is the nominal available power quantity (kW); H the specific heat of water (constant, 4.2 kJ/kg/◦C); Q the yield of ...Nataša Čuković-Ignjatović, Ana Vranješ, Dušan Ignjatović, Dejan Milenić, Olivera Krunić. "Sustainable Modularity Approach to Facilities Development Based on Geothermal Energy Potential" in Applied Sciences-Basel, МDPI (2021). https://doi.org/10.3390/app11062691
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Karst aquifer average catchment area assessment through monthly water balance equation with limited meteorological data set: Application to Grza spring in Eastern Serbia
Ristić-Vakanjac Vesna, Prohaska Sevan, Polomčić Dušan, Blagojević B., Vakanjac Boris. "Karst aquifer average catchment area assessment through monthly water balance equation with limited meteorological data set: Application to Grza spring in Eastern Serbia" in Acta Carsologica, Postojina, Slovenija:Karst research institute ZRC SAZU (2013): 109-119. https://doi.org/10.3986/ac.v42i1.642
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Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete
Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović (2021)sagorevanje lignita, otpadna šljaka, zamena cementa, proizvodnja maltera i betona, fizičko-mehanička i fizičko-hemijska karakterizacija... replaced with 10%, 15%, 20%, and 25% of slag and silica fumes regarding mass (whereby slag participated with 88%, and silica fumes with 12%). The mass ratio between the quantity of binder and sand in all mixtures was 1:3, while the mass ratio between the water and binder was 1:2. Superplasticizer was used ...
... ◦C to the constant mass (M0). Then the surface of the prism failure was set on the linear supports in a deep vessel, where water was poured so that the prism was immersed by 5 to 10 mm. Prior to the immersion, the mass of the dry sample was measured, and after the immersion, the mass of the sample was ...
... were used, in which cement was replaced with slag and silica fumes in the same mass percentage as was the case in making the mortar mixtures. All mixtures were made with the same water–binder ratio w/b = 0.486 and the same mass ratio of aggregate and binder magg/mb = 5.003. Superplasticizer was used for ...Milan Kragović, Nenad Ristić , Jelena Gulicovski, Andrijana Nedeljković, Snežana Pašalić, Ivica Ristović, Marija Stojmenović . "Application of Lignite Combustion Waste Slag Generated in Heating Plants as a Partial Replacement for Cement. Part II: Physical–Mechanical and Physical–Chemical Characterization of Mortar and Concrete" in Minerals, MDPI (2021). https://doi.org/10.3390/min11090925
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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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An Efficient Class of Iterative Root-Finding Methods with Applications
Dejan Ćebić, Nebojša Ralević (2021)Dejan Ćebić, Nebojša Ralević. "An Efficient Class of Iterative Root-Finding Methods with Applications" in 2021 IEEE 19th International Symposium on Intelligent Systems and Informatics (SISY), IEEE (2021). https://doi.org/10.1109/SISY52375.2021.9582495