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Упит dcterms_subject_txt:fluid loss control

358 items

  • Debris-flow Susceptibility Assessment in Flow-R: Ribnica River Case Study

    Ksenija Micić, Miloš Marjanović, Biljana Abolmasov (2024)
    Debris flows are among the most dangerous erosional geohazards due to the fast rate of movement and long runout zones. Even though the initiation can be triggered in mountainous areas, inhabited and with steep slopes, their propagation and deposition can endanger not only buildings and infrastructure in the urbanized areas, but also threaten human lives. As these initiation areas usually represent unattainable terrains with rapid vegetation cover development, field observations and aerial photo analysis become high-demanding tasks. Consequently, medium-to-regional ...
    tečenje drobine, Flow-R, procena podložnosti, empirijski model

  • Evidence for Ladinian (Middle Triassic) platform progradation in the Gyulakeszi area, Tapolca Basin, Western Hungary: Microfacies Analysis and Biostratigraphy

    Zsolt Robert Nagy, Nevenka Đerić, Sándor Kovács, Anna Oravecz-Scheffer, Felicitász Velledits, Olga Piros, Gabor Csillag (2014)
    anizik, ladin, karbonati, litostratigrafija, biostratigrafija, konodonti, radiolarije, dijageneza
    ... and Ombrettola platforms in the Dolomites resulted from the sealing effect of the low- permeability Ladinian volcanics preventing dolomitiz- ing fluid from circulating through these units. The ab- sence of Ladinian volcanics (“\/engen”) in the succes- sions of the Balaton Highland is well known ...
    ... Anisian structural highs, which were surrounded by the Bu- chenstein basin (Maurer 2000; Emmerich et al. 2005). "There was a strong biological control on reef evolution since microbial carbonates were dominant while frame- lowing the Permian- 'Triassic biological crisis (Flagel 1982, 2002; Senow- ...
    ... paleogeographic positions where the subsi- dence rate, local and regional tectonics, sediment pro- duction, or distance form volcanic centers were control- ling the growth of these platforms (Maurer 2000). The rest of this section describes some well-known examples to illustrate this point. In ...

  • A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach

    Nikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    fuzzy logic, max-min composition, continuous part of combined system (CCS), open pit, mining, dependability

  • Model predviđanja potresa od miniranja na površinskim kopovima primenom simulacione metode Monte Karlo i fazi logike

    Milanka N. Negovanović (2015-06-30)
    Modeliranje predviđanja potresa tla od miniranja primenom fazi logike i metode MonteKarlo zasnovano je na podacima dobijenim terenskim merenjima potresa uzrokovanihminiranjem. Promenljive modela definisane su analizom parametara bušenja i miniranjaminskih serija, kao i velosigrama izmerenih potresa od miniranja. Iskorišćene suprednosti fazi logike u implementaciji mnogo većeg broja ulaznih i izlaznih veličina zamodeliranje u odnosu na postojeće empirijske modele. Na osnovu identičnih podataka,dobijen je regresioni model predviđanja potresa, da bi se izvršilo testiranje novogmodela. U cilju povećanja pouzdanosti modela predviđanja, ...
    model, predviđanje potresa, miniranje, površinski kop, Monte Karlo, fazilogika, regresiona analiza, FFT analiza, spektri odziva, pomeraj pukotina
    ... predicting ground vibration caused by rock blasting in surface, Journal of Vibration and Control 0(0) 1–16. DOI: 10.1177/1077546312437002, 2012. 24. Singh, T.N., Singh, V., An intelligent approach to predict and control ground vibration in mines, Geotechnical and Geological Engineering 23(3), 2005, 249-262 ...
    ... Man-Machine Studies, 7(1), 1975, 1-13. 122. Lee, C.-C., Fuzzy logic in control systems: fuzzy logic controller - part1, IEEE Transactions on Systems, Man, and Cybernetics, 20(2), 1990, 404-418. 123. Lee, C.-C., Fuzzy logic in control systems: fuzzy logic controller - part2, IEEE Transactions on Systems ...
    ... zaključivanja su korišćena kao kontroleri za stvaranje ulaza toplote rezervoara i otvora ventila cilindra generatora pare, za regulaciju pritiska fluida u rezervoaru i brzine rada generatora. Pošto je postrojenju bila potrebna samo klasična vrednost kao ulaz, potrebno je primeniti defazifikator ...

  • Model predviđanja potresa od miniranja na površinskim kopovima primenom simulacione metode Monte Karlo i fazi logike

    Milanka N. Negovanović (2015-06-30)
    Modeliranje predviđanja potresa tla od miniranja primenom fazi logike i metode MonteKarlo zasnovano je na podacima dobijenim terenskim merenjima potresa uzrokovanihminiranjem. Promenljive modela definisane su analizom parametara bušenja i miniranjaminskih serija, kao i velosigrama izmerenih potresa od miniranja. Iskorišćene suprednosti fazi logike u implementaciji mnogo većeg broja ulaznih i izlaznih veličina zamodeliranje u odnosu na postojeće empirijske modele. Na osnovu identičnih podataka,dobijen je regresioni model predviđanja potresa, da bi se izvršilo testiranje novogmodela. U cilju povećanja pouzdanosti modela predviđanja, ...
    model, predviđanje potresa, miniranje, površinski kop, Monte Karlo, fazilogika, regresiona analiza, FFT analiza, spektri odziva, pomeraj pukotina
    ... predicting ground vibration caused by rock blasting in surface, Journal of Vibration and Control 0(0) 1–16. DOI: 10.1177/1077546312437002, 2012. 24. Singh, T.N., Singh, V., An intelligent approach to predict and control ground vibration in mines, Geotechnical and Geological Engineering 23(3), 2005, 249-262 ...
    ... Man-Machine Studies, 7(1), 1975, 1-13. 122. Lee, C.-C., Fuzzy logic in control systems: fuzzy logic controller - part1, IEEE Transactions on Systems, Man, and Cybernetics, 20(2), 1990, 404-418. 123. Lee, C.-C., Fuzzy logic in control systems: fuzzy logic controller - part2, IEEE Transactions on Systems ...
    ... zaključivanja su korišćena kao kontroleri za stvaranje ulaza toplote rezervoara i otvora ventila cilindra generatora pare, za regulaciju pritiska fluida u rezervoaru i brzine rada generatora. Pošto je postrojenju bila potrebna samo klasična vrednost kao ulaz, potrebno je primeniti defazifikator ...

  • Centar za hidrogeologiju karsta - 15 godina nauke i struke

    urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović (2023)
    Centar za hidrogeologiju karsta
    ... (Herzegovina, Montenegro) and for the first-time successful results were achieved in such porous media as karst. Technical applications for the control and regulation of karst aquifer through the construction of galleries, batteries of wells, and groundwater rTeservoirs (storage) represented an ...
    ... the Centre for karst hydrogeology in Serbia, several successful projects were designed and implemented in Serbia with technical applications for control and engineering regulation of karst aquifer through the 15 CKH Grupa učesnika Međunarodne IAH konferencije KARST 2005 ispred spomenika Jovanu ...
    ... Basin Management Plans Capacity Building in Woater Sector River Basin Management Plan for Sava River in B&H (Hydrogeological part) Monitoring, control, and protection of the regional water supply source “Bolje sestre” for Montenegro Coast o Tracer tests with Na-fluoresceine oh the Orah collapse ...

  • Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)

    Dušan Polomčić, Dragoljub Bajić, Jelena Zarić (2015)
    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 ...
    Water supply, Aquifer, Flow, Groundwater regime, Numerical modeling, Particle tracking
    ... Issue 3, pp 217-229 218 Nowadays, water supply is a highly complex and significant issue in every society. It is of vital importance to control and monitor the operation of each water source. Unfortunately, there are many problems. Even when the required legislation is in place, it is sometimes ...

  • Advancing Sentiment Analysis in Serbian Literature: A Zero and Few-Shot Learning Approach Using the Mistral Model

    Milica Ikonić Nešić, Saša Petalinkar, Mihailo Škorić, Ranka Stanković, Biljana Rujević (2024)
    Ova studija predstavlja analizu sentimenta srpskih starih romana iz perioda 1840-1920, koristeći veliki jezički model (LLM) Mistral za tehniku učenja sa zasnovani na takozvanim "zero" i "few-shot" pokušajima. Glavni pristup uvodi inovacije osmišljavanjem istraživačkih upita (promptova) uključuju tekst sa uputstvom za klasifikaciju bez primera i na osnovu nekoliko primera, omogućavajući jezičkom modelu da klasifikuje osećanja u pozitivne, negativne ili objektivne kategorije. Ova metodologija ima za cilj da pojednostavi analizu osećanja ograničavanjem odgovora, čime se povećava preciznost ...
    zero-shot, few-shot, sentiment, Serbian, Mistral model

  • Природни потенцијал минералних вода Србије - Natural potential of mineral waters in Serbia

    Оливера Крунић (2021)
    минералне воде

  • Синтеза, структурне и магнетне особине Ca1-xGdxMnO3 нанопрахова

    Milena Rosić (2014-12-05)
    У оквиру ове докторске тезе, испитиване су оптималне методе за добијањенанопраха – калцијум манганског оксида допираног јонима гадолинијума. Циљистраживања је испитивање одговарајућих прекурсора који су подесни да седобију чисти нано прахови манганита са перовскитском структуром, као имонофазни чврсти раствори са перовскитском структуром. Као подесан методкоришћена је модификована глицин нитратна метода, а од прекурсора нитрати иацетати одговарајућих метала. Модификација глицин нитратне методе се односина делимичну замену нитрата ацетатима, чиме је ублажена бурност реакције.Испитан је различити однос прекурсора, који дају наночестичне ...
    Наноструктурни материјали, Оксиди, Термална анализа,Рендгенструктурна анализа, Магнетна мерења.
    ... procedure was performed by partial replacement of nitrates by acetates, in order to control the burn-up reaction. Examined the relationship of various precursors, which give nanosized powders have a small loss in reactions. Synthesized four nanopowders using modified glycine nitrate procedure ...
    ... 58-61. Wang, Z. L., Yin, J. S., Jiang, Y. D. (1997): Studies of Mn valence conversion and oxzgen vacancies in La1-xCaxMnO3-y using electron energy-loss spectroscopy. Appl. Phys. Lett. 70, 3362-3364. Wang, Y., Sui, Y., Su W. (2008): High temperature thermoelectric characteristics of Ca0.9R0.1MnO3 ...

  • Age of the Jurassic hemipelagic sediments from the Ljubiš area (Zlatibor Mt., SW Serbia)

    Nikita Bragin, Nevenka Đerić (2020)
    Radiolaria, Dinarides, Jurassic, stratigraphy, Serbia
    ... instances they are very comprehensive, while in the other cases they are scarce or rare. Some formations still have only limited biostrati­ graphic control and their stratigraphic positions were determined by indirect methods. GAWLICK et al. (2017) recently proposed a late Middle Jurassic to Late Jurassic ...

  • 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 (2024)
    multi-criteria decision-making, definition of criteria, underground exploitation

  • Примена беспилотних летилица при месечном снимању радова на површинском копу ,,Дрмно”

    Теодора Унгурјановић (2024)
    Циљ истраживања је да се оцени ефикасност и прецизност беспилотних летелица у прикупљању података, напретку радова и употребљивост у оптимизацији операција на копу. Коришћени су напредни сензори и софтвери за обраду података како би се омогућила детаљна анализа терена и обим ископаног материјала. Овај рад истражује различите методе снимања терена, укључујући ласерско скенирање и фотограметријско снимање терена. Такође, детаљно се анализира употреба беспилотне летелице модела Aibot X6 V2 за месечно снимање радова на површинском копу ,,Дрмно“. Прикупљени подаци су обрађени помоћу ...
    беспилотне летелице, фотограметрија, ласерско скенирање, ПК ,,Дрмно“, обрада снимака
    ... raukacTH 0031aK KoOjH ce KoOpucTH 3a KpeHpabbe 3D Mojnena H oprobokaparTa, a rpenH3HocT ce IipoBepaBa KOHTpOJIHHM TauKaMa. • Tie point &. Ground control point Cmaka 2.2. ĐororpaMeTpHJCKO CHHMaMbe TepeHa. 2.1.2.1 CBaMame TepeHa 0CecrHJIOTHHM JIeTeJIHIIAMa BecrmoTHe neTenmine Cy Ba3JlyXOIIIOBH KOJH ...

  • Geochemical evaluation of dolostone deposits in Montenegro: Implications for potential industrial applications

    Darko Bozovic, Vladimir Simic, Dragan Radulovic, Slobodan Radusinovic, Vesna Matovic, Anja Terzic (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    примарне сировине, минералогија, физичко-механичка својства, технолошка својства, наука о материјалима

  • Definition of criteria and alternatives for choosing the optimal mining method deposits when applying multi – criteria optimization

    Sanja Bajić, Dragoljub Bajić, Branko Gluščević, Radmila Gaćina, Josip Išek (2024)
    višekriterijumska optimizacija, definisanje kriterijuma, podzemna eksploatacija

  • Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event

    Barbara V. Radulović, Lubomir S. Metodiev, Neda Motchurova-Dekova, Platon Tchoumatchenco (2023)
    Brachiopods, taxonomy, biostratigraphy, early Toarcian Anoxic Event, Bulgaria

  • 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
    ... which is supported by the known facts (e.g. MAROVIĆ & KNEŽEVIĆ, 1985; TOLJIĆ, 1996; MAROVIĆ et al., 2007). The main assump- tion was the tectonic control of the orientation of river valleys and linear features that were recognized at the given map scale. In addition to the authors rare measurements ...
    ... 39–49. KOVÁCS, G., FODOR, L., KÖVÉR, S., MOLNÁR, G., RAÁB, D., TELBISZ, T. & TIMÁR, G. (2015): Verification of Late Miocene to Quaternary structural control on landforms: a case study with comprehensive methodology from a low hilly area (western Pannonian Basin).‒ Austrian Journal of Earth Sciences, 108/2 ...

  • Multiple-Criteria Decision-Making in Mine Development Planning

    Sanja Bajić (2023)
    The Borska Reka ore deposit is an experimental location where developed methodologies have been applied. It is the largest ore body within the Bor mining complex, which has been the subject of numerous studies and analyses for more than three decades. The paper focuses on the application of FAHP and the VIKOR method to address ranking of alternatives and select the optimal mining method by means of fuzzy multicriteria optimization.

  • Старење бунара у алувијалним срединама различитог степена оксичности

    Brankica Majkić (2013-09-27)
    Старење бунара настаје као последица процеса корозије и колмирања. Процесекорозије могуће је спречити уградњом филтерских конструкција од материјалаотпорних на корозију. Колмирање може да настане без обзира на врсту материјалаод кога се праве бунарске конструкције, а процесом може бити захваћенаприфилтарска зона па и зона саме водоносне средине. Из тог разлога тезa јеусмеренa на процесе који доводе до колмирања бунара и последицe опадањaкапацитета водозахватних објеката. Полазна хипотеза је да бунари стареразличитом брзином у срединама различитог степена оксичности. Хидрохемијскеи микробиолошке карактеристике подземних ...
    старење бунара, алувијалне издани, степен оксичности средине,колмирање, бунарски талог, локални хидраулички губитак, дозвољене улазнебрзине
    ... water sources and drainage systems. Key words: water well ageing, alluvial aquifers, oxic conditions, clogging, incrustations, local hydraulic loss, permissible entrance velocity. SCIENTIFIC DISCIPLINE: GEOLOGICAL ENGINEERING SPECIAL TOPICS: WATER SUPPLAY AND GROUND WATER MANAGEMENT UDC: ...
    ... Паланци обезбедило уредно водоснабдевање (Томић 2001). Све бунаре урадио је „Геозавод“-Хиг бушаћом гарнитуром „STIHL“, без коришћења исплаке као флуида за бушење. Пречника бушења                                                              1 Након бушења бунарима су промењени називи, те је бунар ...
    ... године и добио је ознаку Vb-10. Бунари у приобаљу Велике Мораве су бушени машинском гарнитуром „ФА-12“ уз коришћење чисте воде као исплачног флуида. Бушење је код свих бунара континуално обављено пречником φ820 mm до завршне дубине бушења. По завршетку бушења уграђена је челична конструкција ...

  • Fuzzy expert analysis of the severity of mining machinery failure

    Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković (2020)
    Mining machinery failure is almost an everyday occurrence. Usually the failures bare certain consequences, which require additional financial costs to repair and restore the system to its operational state. The consequences are viewed through negative and damaging effects a failure has on the machine, health and safety of the employees, work environment, and on the environment. The removal of the consequences of the failure requires additional financial investment, which has a negative impact on the company’s business. In order ...
    Severity of failure, Severity of failure assessment, Mining machinery, Fuzzy sets, Fuzzy logic