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Упит dcterms_subject_txt:fluid loss control

346 items

  • A Fuzzy Expert Model for Availability Evaluation

    Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić (2019)
    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 ...
    raspoloživost, ekspertski sistem, fazi teorija, buldozeri
    ... Availability Evaluation | Dejan Ivezić, Miloš Tanasijević, Predrag Jovančić, Radiša Đurić | Proceedings of the 2019 20th International Carpathian Control Conference (ICCC) | 2019 | | http://dr.rgf.bg.ac.rs/s/repo/item/0005043 Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду ...

  • Ograničenja primene optimizacionih algoritama u slučaju kopova

    Dejan Stevanović, Mirjana Banković, Milica Pešić Georgiadis, Petar Marković, Dejan Ranković (2020)
    Proces optimizacije površinskih kopova, kao sastavni deo strateškog planiranja, veoma je važan sa stanovišta ostvarivanja maksimalnih efekata proizvodnje. To je složen zadatak koji vrlo često podleže vrlo strogim geometrijskim i drugim praktičnim rudarskim ograničenjima. Ova ograničenja u posebno su izražena na površinskim kopovima uglja, te u značajnoj meri mogu povećati stepen neizvesnosti rudarskog projekta, odnosno izazvati neželjena dejstva u pogledu profitabilnosti poslovanja. Iz tog razloga, veoma je važna primena savremenih optimizacionih alata, koji u značajnoj meri mogu olakšati celokupan ...
    ... Banković M., Stevanović D., Pešić M., Tomašević A. & Kolonja B.: Improving Efficiency of Thermal Power Plants Through Mine Coal Quality Planning and Control. Thermal Science, 22(1B), pp.721-733, 2017 Benndorf J.: Investigating the variability of key coal quality parameters in continuous mining operations ...
    ... Srbije, pp. 952-960, ISSN 0040-2176, 2014 Stevanović D., Banković M., Pešić Georgiadis M., Stanković R.: Operational Mine Planning and Coal Quality Control: Case Study Tamnava West, Tehnika, Special edition, Savez inženjera i tehničara Srbije, pp. 41-51, ISSN 0040-2176, UDC: 62(062.2) (497.1), 2015 ...

  • Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides

    Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)
    analogno modelovanje, raspodela deformacija, geometrija indentera, Černa i Timok rasedni sistem
    ... strike-slip faults: numerical results. Tectonophysics 721, 211–226. Weijermars, R., Schmeling, H., 1986. Scaling of Newtonian and non-Newtonian fluid dynamics without inertia for quantitative modelling of rock flow due to gravity (including the concept of rheological similarity). Phys. Earth Planet ...
    ... deformation around the NW corner of the indenter creating oblique-slip normal faults (splaying in Fig. 5d, g, h, k, l, 7b). These oblique-slip faults control the subsidence in this NE-SW to E-W oriented basin north of the indenter, which is connected to the main N–S oriented basin along the western margin ...
    ... southwards with subsequent deformation and rotation (i. e., in the direction away from the pole of rotation). Transtensional (dextral-normal) faults control the subsidence and bound the basin to the west and east (structures 2 and 3 in Fig. 8c). Structure 2 accom- modates a larger amount of deformation ...

  • Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia

    Fen Huang, Ljiljana Vasic, Xia Wu, Jianhua Cao, Saša Milanovic (2019)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike

    Мирослав Црногорац, Душан Даниловић, Лола Томић (2020)
    ... Incoming Quality Control, https://www.qdatahub.com/q-shop-data- collection-system/incoming-quality-control/ (posećeno oktobra 2020.) [6] Anjoran, R., The Importance of Incoming Quality Control of PCB Components, https://www.cmc-consultants.com/blog/the-importance- of-incoming-quality-control-of-pcb-components ...
    ... remont; fizičko-geološki parametri.(B), odnosno: (B1) dubina, (B2) proizvodnja, (B3) temperatura, (B4) gustna fluida, (B5) viskozitet, (B6) devijacija bušotine; parametri prizvodnog fluida proizvodnji (Parametri operativnih problema) .(C) odnosno: (C1) korozija, (C2) čvrste čestice, (C3) GOR, (C4) ...
    ... Abstract: In this paper the effects of locus of control on the implementation of knowledge management in organizations is analyzed. The subject and the problem of the research are presented through the presence of certain types of employee locus of control and its impact on knowledge management impl ...

  • 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 ...
    nafta, proizvodnja, optimizacija, Amal, Libija
    ... 3.3.1. Postupak pripreme proizvedenog fluida Proces pripreme proizvedenog fluida na naftnom polju Amal koncipiran je tako da omogućava održavanje visokog nivoa proizvodnje. Na slici 3.5 šematski je prikazan postupak pripreme proizvedenog fluida. ...
    ... na osnovu merenih podataka proizvodnje fluida I količine utisnutog gasa. Na slici 5.28. prikazan je izbor korelacije na osnovu merene proizvodnje fluida I količine utisnutog gasa. Na osnovu poklapanja vrednosti utisnutog gasa I izmerene proizvodnje fluida zadovoljavajuće korelacije koje bi mogle ...
    ... (iznošen) alatom na žici ili putem savitljivog tubinga uz stalnu cirkulaciju fluida. Proces uklanjanja zahteva zatvaranje bušotine, odnosno prekid proizvodnje. 4.2.2. Taloženje u površinskoj opremi Pri brzinama fluida koje su dovoljno velike da iznesu slojni pesak na površinu dolazi do njegove ...

  • 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 ...
    nafta, proizvodnja, optimizacija, Amal, Libija
    ... 3.3.1. Postupak pripreme proizvedenog fluida Proces pripreme proizvedenog fluida na naftnom polju Amal koncipiran je tako da omogućava održavanje visokog nivoa proizvodnje. Na slici 3.5 šematski je prikazan postupak pripreme proizvedenog fluida. ...
    ... na osnovu merenih podataka proizvodnje fluida I količine utisnutog gasa. Na slici 5.28. prikazan je izbor korelacije na osnovu merene proizvodnje fluida I količine utisnutog gasa. Na osnovu poklapanja vrednosti utisnutog gasa I izmerene proizvodnje fluida zadovoljavajuće korelacije koje bi mogle ...
    ... (iznošen) alatom na žici ili putem savitljivog tubinga uz stalnu cirkulaciju fluida. Proces uklanjanja zahteva zatvaranje bušotine, odnosno prekid proizvodnje. 4.2.2. Taloženje u površinskoj opremi Pri brzinama fluida koje su dovoljno velike da iznesu slojni pesak na površinu dolazi do njegove ...

  • Using technology for knowledge transfer between academia and enterprises

    Ivan Obradović, Ranka Stanković (2014)
    ... integrated within the TEL platform’s LMS to provide a synergy of functionalities for efficient realization of the proposed approach. A backend control panel within the platform will enable teachers in the academic environment to track the progress of students while using the learning resources, ...
    ... assistants (TA) and publish their own educational materials on the platform. As for the entrepreneurial environment, the TEL platform’s backend control panel provides similar opportunities for tracking the progress of graduate students who started to work in companies and are now involved in life-long ...

  • Primena programa UVSZ pri zaštiti od miniranja

    Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac, Rade Tokalić (2021)
    Primena energije eksploziva tj. miniranje, predstavlja osnovni način eksploatacije čvrstih mineralnih sirovina u rudarstvu. Miniranjem se postižu vrlo povoljni tehnoekonomski pokazatelji, koje nažalost prate i negativni efekti miniranja. U cilju zaštite životne sredine potrebno je za svaku radnu sredinu odrediti jednačinu oscilovanja stenske mase pri miniranju. Ova jednačina definiše promenu brzine oscilovanja stenske mase u zavisnosti od rastojanja, količine eksploziva, uslova izvođenja miniranja i geoloških karakteristika stenske
    Program UVSZ, miniranje, potres, zaštita životne sredine
    ... velocity for each subsequent blasting in a given working environment. On that way, shocks from blasting, in a seismic sense, are brought under control. In this paper, the application of UVSZ program is shown, which is used for analysis and presentation of measured data at PC. Key words: UVSZ ...
    ... oscillation velocity for each subsequent blasting in a given working environment. On that way, shocks from blasting, in a seismic sense, are brought under control. In this paper, the application of UVSZ program is shown, which is used for analysis and presentation of measured data at PC. Key words: UVSZ program ...

  • Upper Miocene depositional environments of the Kikinda-Mokrin High (Serbia)

    Saša Ivanišević, Dejan Radivojević (2018)
    Exploration for oil and gas in mature areas, such as the Pannonian Basin, can benefit from reexamination of old data using more advanced modern workflows that focus on the temporal and spatial aspects of sediment deposition. Specifically, we apply a new environment of deposition model that interprets the Upper Miocene- Pliocene sediments as being deposited in a rapidly filling basin characterized by quick shelf edge progradation from the northwest toward the southeast. Reconstruction of this shelf edge trajectory reveals ...
    naftna geologija, depozicione sredine, formacije, Panonski basen

  • Управљање радом центрифугалних компресора

    Младен Благојевић (2024)
    Овај мастер рад се бави анализом и управљањем рада центрифугалних компресора у индустријским постројењима, са посебним освртом на управљачке системе који осигуравају њихов ефикасан рад. Рад обухвата разматрање различитих система за регулацију протока, притиска и примену савремених метода регулације као што су повратна и напредна. Такође, анализиране су динамичке промене у раду компресора, утицај поремећајних величина и могућности оптимизације. Резултати су показали да правилна примена управљачких система не само да спречава пумпање, већ и повећава стабилност и продуктивност целокупног ...
    центрифугални компресори, управљање компресорима, проток притисак, повратна регулација, напредна регулација, оптимизација
    ... Op3HHe poropa om 60% o 120% oJl HOMHHaJIHe BpejHoOcTH. Ejumnce Ha upTexxy OJ1TOBapajy KOHCTaHTHHM BpeJIHOCTHMa ce(biKacHOcCTH KOMIIpecopa 1 Process Control for Compression Systems, Article in Journal of Engineering for Gas Turbines and Power, August 2017. 35 140 120 Pri tis ak - % { st ep ...
    ... HJIH IIDpOMeHHTH pajiHy TauKy Ca CIIOJPbaIIPbe Ha JIOKAJIHYy. Anaynna rpepBeHnuje ryOuTaka nokayyjJe Ja Je noMohHu yripaBJbaukH Kpyr (epri. surge control loop) noOpo pememe 3a cBe HHaMHuKe KOMITIpecope. IIloMohHuH ynpaBJbaukH KpyT JIeTeKTyJe II0jaBy IIyMIaFba H HiIpe)ly3HMa yHarnpeji rporpaMupaHc Mepe ...
    ... com/blog/how-do-centrifugal-compressors-work/. . AyroMaTcka peryznanuja KoMiipecopa, 3aBpmrnu paji, Kpacrajar Bakuh, 3arpeo 2015. · Process Control for Compression Systems, Article in Journal Engineering for Gas Turbines and Power, August 2017. .· Linkedin Article, URL: https://www.linkedin ...

  • Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example

    Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, Irena Georgievska (2020)

  • Extreme Rainfall Event and Its Aftermath Analysis—IPL 210 Project Progress Report

    Biljana Abolmasov, Mileva Samardžić Petrović, Ranka Stanković, Miloš Marjanović, Jelka Krušić, Uroš Đurić (2021)
    Landslides, Extreme precipitation, Data analysis, IPL project report

  • From DELA Based Dictionary to Leximirka Lexical Database

    Biljana Lazić, Mihailo Škorić (2020)
    In this paper, we will present an approach in transforming Serbian language Morphological dictionaries from a DELA text format to a lexical database dubbed Leximirka. Considering the benefits of storing data within a database when compared to storing them in textual documents, we will outline some of the functionality that the database has made possible. We will also show how hand-made rules that use category labels lexical entries are marked with can be used to link lexical entries. ...
    Morfološki rečnici, jezički resursi, Leksimirka
    ... database was conducted. During the transfer of data to the database some errors were discovered, that inevitably occur when working without automatic control of data entry. It happened that category labels were misspelled due to typographical errors; markers were used for the same concept and one marker ...
    ... used system Leximir based on DELA dictionary textual files. As noted in the paper, the new system has brought about many advantages in terms of entry control, au- tomatic vocabulary enrichment, multiuser work, and the establishment of relationships among lexical entries. The plan is to add new rules and ...

  • An arid phase in the Internal Dinarides during the early to middle Miocene: Inferences from Mg-clays in the Pranjani Basin (Serbia)

    N. Andrić-Tomašević, V. Simić, O. Mandic, D. Životić, M. Suárez, E. García-Romero (2020)
    Paleontology,Earth-Surface Processes,Ecology, Evolution, Behavior and Systematics,Oceanography

  • Preliminary regional landslide susceptibility assessment using limited data

    Igor Peshevski, Milorad Jovanovski, Biljana Abolmasov, Jovan Papic, Uroš Đurić, Miloš Marjanović, Ubydul Haque, Natasha Nedelkovska (2019)
    In this paper a heuristic approach for preliminary regional landslide susceptibility assessment using limited amount of data is presented. It is called arbitrary polynomial method and takes into account 5 landslide conditioning parameters: lithology, slope inclination, average annual rainfall, land use and maximum expected seismic intensity. According to the method, in the first stage, a gradation is performed for each of the carefully selected conditioning parameters by assigning so called rating points to the grid cells on which the ...
    klizišta, podložnost
    ... (Probistip, Makedonska Kamenica, Delcevo and Tetovo in 2015, 2016, 2017, 2018 respectively) are clear examples of such scenarios. Apart from the economic loss, some of these landslides have been life- threatening and human losses have been reported (PESHEVSKI et al., 2017). In the absence of more precise ...
    ... the size of the study area, resulting in increased data requirements in large study areas, and (4) the use of oversimplified factors assumed to control or trigger landslides, by only considering information that is relatively easily mapped or derivable from a digital elevation model (DEM). Furthermore ...

  • Curcumin nanonization using an alternative small-scale production unit: selection of proper stabilizer applying basic physicochemical consideration and biological activity assessment of nanocrystals

    Ines Nikolić, Jelena Antić-Stanković, Dragana Božić, Danijela Ranđelović, Bojan Marković, Dominique Jasmin Lunter, Aleksandar Kremenović, Miroslav Savić, Snežana Savić (2020)
    As the number of poorly soluble drugs is increasing, nanocrystals have become very interesting due to wide range of application possibilities. Curcumin was used as a model active ingredient in this work. Even though it has many proven positive effects, due to its physicochemical issues, its possibilities have not been fully exploited. The goal of this work was to select optimal conditions for a top-down method for curcumin nanosuspension production, and to perform their comprehensive characterization applying complementary methodologies: ...
    nanocrystal, curcumin, top-down method, wetball milling

  • Understanding partitioning of deformation in highly arcuate orogenic systems: Inferences from the evolution of the Serbian Carpathians

    Nemanja Krstekanić, Liviu Matenco, Marinko Toljić, Oleg Mandić, Uroš Stojadinović, Ernst Willingshofer (2020)
    orogeneza, oroklini, višesmerna ekstenzija, transkurentna kretanja, Srpski Karpati
    ... basement in the centre of the studied area, while northwards and southwards they control the onset of early middle Miocene deposition in the Žagubica and Krivi Vir Basin. Furthermore, similar E-W oriented normal faults control the early middle Miocene onset of deposition in large intramontane basins outside ...
    ... was pro- jected at depth and correlated with other existing surface and depth constraints. The eastern part of these profiles has less structural control at depth and, therefore, our surface to depth projection has a higher degree of uncertainty. 3.1. NW-SE to NE-SW oriented shortening in the vicinity ...
    ... observations in the latter area is reduced. A higher density of such normal faults is observed near the Senje–Resava Basin, where they appear to control the Oligocene–early Miocene sedimenta- tion (e.g., sites De9 and Cg7, structures 10 and 13 in Fig. 7) and are truncated by the subsequent Upper Getic ...

  • Primena ubrzane konsolidacije kod izgradnje nasipa na deonici priključka Novi Beograd – Surčin autoputa ,,Miloš Veliki"

    Aleksa Tomičić (2024)
    Problem koji se javlja prilikom izgradnje objekata na ne konsolidovanom stišljivom tlu jeste pre svega vezan za prevelika sleganja tla usled opterećenja od objekata, najčešće su to objekti putne infrastrukture (nasipi), ili stambeno poslovni objekti. U tu svrhu se,primenjuju različiti vidovi ubrzanja konsolidacije tla. Stoga za potrebe izrade završnog rada Master akademskih studija studijskog programa geotehnika, na Rudarsko-geološkom fakultetu, izvršena je analiza dva najčešće korišćena postupka ubrzanja konsolidacije: predopterećenjem i ugradnjom peščanih drenova. Glavni cilj ovih postupaka je ...
    stišljivo tlo, konsolidacija, ubrzanje konsolidacije, predopterećenje, peščani drenovi

  • Inhibitory effect of platinum and ruthenium bipyridyl complexes on porcine pancreatic phospholipase A2

    Tina Kamčeva, Jörg Flemmig, Bojana Damnjanović, Jürgen Arnhold, Aleksandar Mijatović, Marijana Petković (2011)
    Fosfolipaza pankreasa A2 (PLA2) igra važnu ulogu u ćelijskoj homeostazi kao iu procesu karcinogeneze. Efekti metalo-lekova koji se koriste kao hemoterapeutici na aktivnost ovog enzima nisu poznati. U ovom radu, interakcija između PLA2 svinjskog pankreasa i dva odabrana kompleksa prelaznih metala — tetrahloro(bipiridin) platine(IV) ([PtCl4(bipi)]) i dihloro (bipiridin) rutenijum(III)hlorida ([RuCl2(bipi)2) ]Cl)—proučavana je. Laserska desorpcija/jonizacija uz pomoć matriksa, vremenska masa spektrometrija (MALDI-TOF MS) i fluorescentna spektroskopija korišćeni su za analizu aktivnosti enzima u odsustvu i prisustvu metalnih kompleksa i za ...
    Metals and Alloys, Biochemistry, Biomaterials, Biophysics, Chemistry (miscellaneous)
    ... PLA2 c = 0.02 mg ml�1 in 50 mM Tris-HCl buffer (37 1C and pH = 8.5) was prepared and applied on the sample plate premixed with sinapic acid, as control. Metal complexes were dissolved in the same buffer to different final concentrations and incubated with the enzyme for three hours and then applied ...
    ... of PLA, c = 0.02 mg ml"! in 50 mM Tris-HCl buffer (37 °C and pH = 8.5) was prepared and applied on the sample plate premixed with sinapic acid, as control. Metal complexes were dissolved in the same buffer to different final concentrations and incubated with the enzyme for three hours and then applied ...
    ... secretory PLA2 is distributed throughout the gastrointestinal tract and is particularly abundant in pancreas and duodenum.49 This enzyme is involved in control of secretin release, which is important for water homeostasis and overall metabolism. The association of pancreatic PLA2 with cancer progression ...