Претрага

Упит dcterms_subject_txt:key block theory

272 items

  • Application of the Fuzzy theory in the evaluation of operating parameters of auxiliary mechanization on open-cast coal mine, case study: pipelayers

    Stevan Djenadić, Miloš Tanasijević, Filip Miletić, Predrag Jovančić (2022)
    Achieved operating parameters are the main indicator of the work quality and selection of mining machines. The effectiveness of a coal mine is correlated with the availability of basic and auxiliary machines. The main task of auxiliary machines in lignite mines is to achieve optimal working conditions. From an economic point of view, auxiliary machines generate up to 20% of the lignite mines' total costs. These are the primary reasons for analyzing their current work and making decisions in ...
    upotrebni kvalitet, fazi teorija, rudarske mašine

  • Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)

    Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević, Miloš Radonjić (2019)
    Mt. Avala is located on the southern margin of the Pannonian basin (SPB), a border zone between the uplifted morphostructures of the Dinarides and Carpathian-Balkanides. Similar to the Pannonian basin, tectonostratigraphic evolution of the Mt. Avala area during the last 23 Ma has is characterized by syn- and post-rifting processes as well as tectonic inversion. Here, we present the results of field investigations of the Miocene‒Pliocene dynamics that led to different spatial positions of the same stratigraphic units (e.g. ...
    мио-плиоценска геодинамика, јужни Панонски басен, Авалски и Торлак хорст, Белопоточки трог, Србија
    ... Torlak block, it represents a horst structure that extended southwards to Mt. Kosmaj (MAROVIĆ et al., 2007). The Torlak block, which is situated north of Mt. Avala, is covered with pre-Badenian and Badenian sediments at about 300m a.s.l. It indicates the upward relative movements of the block that ...
    ... system and landscape evolution during Pon- tian-Quaternary are conditioned by uplift of the Torlak block which has already been elevated since the early Upper Miocene (Fig. 1). Uplift of the Torlak block was probably controlled by the NE– SW striking Torlak fault as well as the E–W directed Rakovica ...
    ... support this fact (e.g. KNEŽEVIĆ, 1989). The block is formed by movements along the Rakovica fault system (RF) and the Torlak fault (Fig. 20). In respect of the geomorphologic properties of the unusual flow/geometry of the Zavojnička Reka near the Torlak block, we don’t have documented data. But, based ...

  • Adaptive neuro-fuzzy prediction of operation of the bucket wheel drive based on wear of cutting elements

    Filip Miletić, Predrag D. Jovančić, Milos Milovančević, Dragan Ignjatović (2020)
    The capacity of the rotor excavator depends largely on the operation of the subsystem for digging. There is a great contribution to the correct and sharp teeth when the capacity is the highest. In the function of time, the teeth become clogged due to abrasive wear, or changes in their geometric shape. To analyze the bucket wheel drive in depend on wear of the cutting elements in this study adaptive neuro fuzzy inference system (ANFIS) approach was implemented. ANFIS ...
    Pogon rotornog točka, habanje, rezni elementi, ANFIS

  • Non-Detonating Chemical Mixture for Non-Invasive Methods of Rock Breaking

    Lazar Kričak, Milanka Negovanović, Nikola Simić, Stefan Milanović (2024)
    Within the Innovation developed several different non-detonating chemical mixtures for non-invasive methods of rock breaking. Laboratory and polygon tests gave the satisfactory results and knowledge enough to start the practical experiments in the field. The basis of this innovation is a theoretical assumption that certain chemical mixtures release a large quantity of gases during combustion. If these gases are found in the enclosed space a growing pressure on the walls of the chamber in which combustion takes place will ...
    non-detonating, chemical mixture, rock breaking, borehole pressure

  • A hundred years of Milutin Milanković's climate change theory - geological implications

    Dejan Radivojević (2020)
    Миланковићева теорија циклуса објављена пре сто година је најважнија теорија у наукама које проучавају климу и имала је велики утицај на дисциплине које се баве Земљом. Ипак, његов рад је чекао више од педесет година да би добио потврду. Може се рећи да Миланковићев рад највећи утицај на геологију има у изради астрономске временске скале, подршци хипотези континенталног дрифта и палеоклиматологији. Добри резултати примене астрономске временске скале на неогене седименте иницирали су примену ове методе у мезозојским и у последње ...
    циклостратиграфија, астономска временска скала, геолошка временска скала, климатске промене, континентални дрифт
    ... hundred years of Milutin Milanković's climate change theory - geological implications Dejan Radivojević Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] A hundred years of Milutin Milanković's climate change theory - geological implications | Dejan Radivojević | ...
    ... Geology, Kamenička 6, 11000 Belgrade, Serbia. E-mail: dejan.radivojevic@rgf.bg.ac.rs Abstract. Milanković’s cycles theory published hundred years ago is the most important theory in climate science and had great influence on Earth disci- plines. Nevertheless, his work waited for more than fifty years ...
    ... 2020). Conclusions Probably the most influential climatic study ever, Milanković’s “Mathematical Theory of Heat Phe- nomena Produced by Solar Radiation” was pub- lished hundred years ago. His theory affected geology and its different branches like stratigraphy, palaeoclimatology, tectonics etc. Recently ...

  • The theory of Hardys Z-function""""

    Ivić Aleksandar (2012)

  • Горњокредне творевине северозападне Србије

    Bojan M. Glavaš-Trbić (2013-11-26)
    У раду су приказане палеогеографске карактеристике и геотектонски положајширег подручја (Јадарског блока и Вардарске зоне) које су утицале на условеталожења, односно карактеристике горњокредних творевина на простору данашњесеверозападне Србије.Описани су карактеристични локални геолошки стубови уз приказ њиховихлитолошких, биостратиграфских и седиментолошких карактеристика. При томе сукоришћена досадашња сазнања о предметном простору изложена у домаћим радовима,и извршена је компарација и корелација са подацима суседних терена, ширеперитетиског ареала.Истраживања у првој фази су вршена на међусобно удаљеним и релативномалим профилима – често само ерозионим крпама ...
    горња креда, стратиграфија, микрофосили, макрофосили, Јадарскиблок-Вардарска зона, СЗ Србија

  • Centenary anniversary of the theory of continental drift by Alfred Wegener and its significance for geosciences and the human society

    Rundić Ljupko (2012)

  • Effectiveness assessment of agricultural machinery based on fuzzy sets theory

    Miodragović Rajko, Tanasijević Miloš, Mileusnić Zoran, Jovančić Predrag (2012)

  • Application of rough set theory for choosing optimal location for flotation tailings dump

    Štirbanović Zoran, Miljanović Igor, Marković Zoran (2013)

  • The divisor function and divisor problem, presented at the Erdös Centennial Conference “ERDOS100” Budapest 2013

    Ivić Aleksandar (2014)

  • 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 (2015)

  • Quantification of Uncertainty in Mining Project Related to Metal Price Using Mean Reversion Process and Interval Type-2 Fuzzy Sets Theory

    Gligorić Zoran, Beljić Čedomir, Gluščević Branko (2013)

  • Evaluation of Underground Zinc Mine Investment Based on Fuzzy-Interval Grey System Theory and Geometric Brownian Motion

    Gligorić Zoran, Kričak Lazar, Beljić Čedomir, Lutovac Suzana, Milojević J. (2014)

  • Operational Efficiency Forecasting Model of an Existing Underground Mine Using Grey System Theory and Stochastic Diffusion Processes

    Svetlana Štrbac Savić, Jasmina Nedeljković Ostojić, Zoran Gligorić, Čedomir Cvijović, Snežana Aleksandrović (2015)
    General Engineering, General Mathematics

  • Long-term rockslope monitoring and rockfall prediction

    Miloš Marjanović, Biljana Abolmasov, Marko Pejić, Jelka Krušić (2021)

  • Imputing missing data using grey system theory and the biplot method to forecast groundwater levels and yields

    Jelena Ratković, Dušan Polomčić, Zoran Gligorić, Dragoljub Bajić (2022)
    Groundwater management is one of today’s important tasks. It has become necessary to seek out increasingly reliable methods to conserve groundwater resources. Dependable forecasting of the amounts of groundwater that can be abstracted in a sustainable manner requires longterm monitoring of the groundwater regime (rate of abstraction and groundwater levels). Monitoring of the groundwater source for the town of Bečej, Serbia had been disrupted for multiple years. The objective of the paper is to assess the possibility of reinterpreting ...
    upravljanje podzemnim vodama, izvorište podzemnih voda, prognoziranje

  • Control of substructure construction of railways in the Republic of Serbia

    Dragan Lukić, Dragoslav Rakić, Irena Basarić Ikodinović (2022)
    Контрола збијености природног тла (у ископу) или збијеног у насипу при изградњи саобраћајница представља један од основних облика контроле квалитета доњег строја. Код изградње брзих саобраћајница (аутопутеви и брза железница) приоритет је постизање високог нивоа контроле извршених радова. У циљу онемогућавања диференцијалног слегања (при изградњи насипа), или промене запремине услед допунског збијања материјала, које неминовно доводе до деформација, потребно је извршити оптимално збијање материјала. У оквиру овог рада приказује се техничка регулатива која регулише контролу збијености при изградњи железничке ...
    доњи строј, техничка регулатива, насип, збијеност, контрола
    ... CONFERENCE ON CONTEMPORARY THEORY AND PRACTICE IN CONSTRUCTION XV STEPGRAD XV PROCEEDINGS Banja Luka, June 16-17, 2022 - 600 STEPGRAD2022 PROCEEDINGS OF INTERNATIONAL CONFERENCE ON CONTEMPORARY THEORY AND PRACTICE IN CONSTRUCTION ...
    ... construction of railways in the Republic of Serbia | Dragan Lukić, Dragoslav Rakić, Irena Basarić Ikodinović | International Conference On Contemporary Theory and Practice in Construction XV, Banja Luka 16-17 jun 2022. | 2022 | | http://dr.rgf.bg.ac.rs/s/repo/item/0006269 Дигитални репозиторијум Рударс ...
    ... the employees' publications. - The Repository is available at: www.dr.rgf.bg.ac.rs INTERNATIONAL CONFERENCE ON CONTEMPORARY THEORY AND PRACTICE IN CONSTRUCTION XV PROCEEDINGS Publisher University of Banja Luka Faculty of Architecture, Civil ...

  • Numerical modeling of Selanac debris flow propagation using SPH code

    Jelka Krušić, Biljana Abolmasov, Miloš Marjanović, Manuel Pastor, Saeid M. Tayyebi (2021)
    The Selanac debris flow is a very huge event triggered after extreme rainfall caused by Cyclone Tamara activity in the Republic of Serbia in May 2014. The Selanac case study was already modelling in different programs using Voellmy rheology assumptions like RAMMS software. In this paper research are focusing particularly on the process of debris flowing from initiation zone to main deposition area using Geoflow SPH two-phase model considering frictional rheology law. Main rheological parameters are back-calculated using also ...
    debris flow, modelling, SPH code, DEM
    ... UAV image of transportation zone The Selanac debris flow is a complex flow type landslide phenomenon, firstly triggered as slide of huge initial block which is 30 m thick in the deepest part. Subsequently, it propagated as a debris flow process, with a long runout distance, including about 1 km ...
    ... the 2008 Wenchuan earthquake’’. Bull Eng Geol Environ 74, 1137–1151. Gingold, R.A., Monaghan, J.J. (1977). ‘’Smoothed particles hydrodynamics: theory and application to non-spherical stars’’. Monthly Notices of the Royal Astronomical Society; 181:375–389. Hungr, O. (1995). ‘’A model for the runout ...

  • The mean value of the Riemann zeta-function on the critical line

    Ivić Aleksandar (2014)