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Упит dcterms_subject_txt:Numerical modeling

250 items

  • Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera

    Aleksandra B. Kolarski (2016-08-25)
    Radio talasi vrlo niskih frekvencija VLF (eng. Very Low Frequency) frekventnog opsega od 3 do 30 kHz, koji se prostiru talasovodom Zemlja-jonosfera (50 -90 km) su, kao što je poznato, efikasni i nezamenljivi u osmatranju pojava u niskoj jonosferi, sa tla...
    prostiranje talasa vrlo niskih frekvencija, talasovod Zemlja-jonosfera, globalno električno kolo, atmosfersko električno pražnjenje, kratkotrajne svetlosne pojave
    ... short-term response of the low ionosphere on gamma ray bursts, Geophys. Res. Lett., 42(19), pp. 8250-8261. 106 Nunn, D. (1997). On the numerical modelling of the VLF Trimpi effect, J. Atmos. Sol.- Terr. Phys., 59(5), pp. 537–560. Parrot, M, Sauvaud, J. A., Soula, S., Pinçon, J. L., van ...
    ... Proceedings of the 14th National Conference of Astronomers of Serbia and Montenegro, 80, pp. 191-195. Šulić, D., Nina, A., Srećković, V. (2010). Numerical Simulations Of The Effect Of Localised Ionospheric Perturbations On Subionospheric VLF Propagation. Publications de l’Observatoire Astronomique ...
    ... poremećaja, zabeležene sistemima AbsPAL (Absolute Phase & Amplitude Logger) i AWESOME (Atmospheric Weather Electromagnetic Sistem for Observation Modeling and Education) u Beogradu, iskorišćene su za dijagnostiku niske jonosfere u regularnim i neregularnim solarno-terestričkim uslovima. Rezultati tih ...

  • Vodosnabdevanje podzemnim vodama u Srbiji-stanje i perspektive

    Dušan Polomčić, Zoran Stevanović, Petar Dokmanović, Petar Papić, Vesna Ristić-Vakanjac, Bojan Hajdin, Saša Milanović, Dragoljub Bajić (2011)
    ... izvorištima opštine Kikinda. Rudarsko-geološki fakultet, Beograd 13. Milanović S., Stevanović Z., Vasić Lj., Ristić V., 2011: Monitoring and physical modeling of karst system as a base for its evaluation and utilization – A case study from eastern Serbia, Proceedings of 9th conference on Limestone hydrogeology ...

  • Characterization of the eastern Suva Planina Mt. karst aquifer (SE Serbia) by time series analysis and stochastic modelling

    Branislav Petrović, Veljko Marinović, Zoran Stevanović (2023)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor

    Miloš Milenković, Miloš Gligorić, Nebojša Bojović, Zoran Gligorić (2023)
    železnica, prekogranični teretni saobraćaj, ARIMA, LSTM, SSA

  • Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content

    Nina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović (2019)
    Mesoporous anatase nanopowders were doped with 0.05−0.5 mol% of W6, in order to obtain more efficient photocatalyst than TiO2 Degussa P25 in the degradation of amitriptyline (AMI) under simulated solar irradiation (SSI). Dominant XRPD peaks were ascribed to anatase phase, with additional peaks which could correspond to brookite, TiO2 bronze and sodium titanate, Na2Ti9O19. The Raman scattering measurements have confirmed anatase as dominant phase, with broad Raman feature at ~270 cm−1 possibly related to Ti–O–Na stretching vibration. All W-doped ...
    Sol-gel synthesis, Doped titania nanopowders, XRPD, Raman spectroscopy, Adsorption and photocatalytic degradation, Psychiatric drugs

  • Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides

    Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor (2019)
    Internal Dinarides, Drina-Ivanjica thrust sheet, Deformation history, K–Ar dating, Obduction, Structural analysis
    ... 1988; Robertson 2004). The understanding: of ophiolite obduction has been improved by contributions from analogue (Agard et al. 2014) and numerical (Duretz et al. 2016) experiments, as well as integrated studies (Jolivet et al. 2015). Less is known about the structural evolution of the continental ...
    ... Western Vardar ophiolites (Fig. 8). Mechanical and thermal feasibility of obduction systems have been tested by analogue (Agard et al. 2014) and numerical (Duretz et al. 2016) experi- ments. Such experiments suggest that underthrusting of the continental margin results in regional metamorphism in ...
    ... anali balkanskoga poluostrva, 49, 11—160. Duretz, T., Agard, P., Yamato, P., Ducassou, C., Burov, E. B., & Gerya, T. V. (2016). Thermo-mechanical modeling of the obduction process based on the Oman ophiolite case. Gondwana Research, 32, 1—10. Ercegovac, M. (1975). Microspores of the older Paleozoic ...

  • Modeliranje buke u zoni površinskog kopa Ljubija ležišta Ciganuša - Škorac

    Teodora Kaličanin (2024)
    Svaki neželjeni zvuk u prirodi se može definisati kao buka. Buka svakodnevno utiče na ljude i predstavlja pretnju po ljudsko zdravalje. Zbog toga su nastale mnoge metode za merenje, proračun i saniranje ovog problema.Tema ovog završnog rada master studija je modeliranje buke u zoni površinskog kopa ''Ljubija''. Opisani su pojam buke i zvuka kao osnov za kasnije iznesene podatke, kao i tipovi i različiti izvori buke. Prikazane su metode merenja buke i uređaji koji se u tom procesu koriste. Obrađen ...
    buka, modeliranje, uticaj na čoveka, površinski kop
    ... Pollutant Inventory, Emission Estimation Technique Manual for Mining and Processing of Metallic Minerals, 2012. 17. EPA, Air Quality Dispersion Modeling - Preferred and Recommended Models, 2017 18. ISO 1996-2:2019 - Akustika — Opisivanje, merenje i ocenjivanje buke u životnoj sredini — Deo 2: ...

  • Mikroelementi u uljnim šejlovima Aleksinca i njihov uticaj na životnu sredinu

    Nikoleta Aleksić (2021)
    ... Zukovic, M. (2017). Negative effective mass in acoustic metamaterial with nonlinear mass-in-mass subsystems. Communications in Nonlinear Science and Numerical Simulation, 51, 89-104. [2] Cveticanin, L., Zukovic, M., Cveticanin, D. (2018). On the elastic metamaterial with negative effective mass. Journal ...
    ... Gourich B., Chafi M., Stiriba Y., Vial Ch., Drogui P., Naja J., (2017). „Electrocoagulation process in water treatment: A review of electrocoagulation modeling approaches“, Desalination 404 [3] Segura S.G., Eibanda M. M. S.G., Vieira de Meloa J., Martínez-Huitlea C. A. (2017). „Electrocoagulation and ...
    ... marine sediment. Environmental Science & Technology 43, 3815–3823. 12. Cho, Y.M., Werner, D., Choi, Y., Luthy, R.G., 2012. Long-term monitoring and modeling of the mass transfer of polychlorinated biphenyls in sediment following pilot-scale in-situ amendment with activated carbon, Journal of Contaminant ...

  • 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.
    ... .bus.lsu.edu/academics/finance/faculty/dchance/Instructional/TN96-03.pdf Chiwaye H.T., Stacey T.R., 2010, A comparison of limit equilibrium and numerical modelling approaches to risk analysis for open pit mining, The Journal of The Southern African Institute of Mining and Metallurgy, vol. 110, str. ...
    ... 2004, Resource Estimation, Snowden Mining Industry Consultants Cowan E.J, Beatson R.K, Ross H.J., Fright W.R, 2003, Practical Implicit Geological Modeling, 5th International Mining and Geology Conference, Bedingo, Victoria, The Australasian Institute of Mining and Metallurgy, str. 89-99. Černý, V., ...
    ... Uncertainty based production scheduling in open pit mining, SME Transactions, vol. 316 Dimitrakopoulos, R, 1998, Conditional simulation algorithms for modeling orebody uncertainty in open-pit optimization. International Journal of Surface Mining Reclamation and Environment, Vol. 2, No. 4, str. 173–179. ...

  • 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.
    ... .bus.lsu.edu/academics/finance/faculty/dchance/Instructional/TN96-03.pdf Chiwaye H.T., Stacey T.R., 2010, A comparison of limit equilibrium and numerical modelling approaches to risk analysis for open pit mining, The Journal of The Southern African Institute of Mining and Metallurgy, vol. 110, str. ...
    ... 2004, Resource Estimation, Snowden Mining Industry Consultants Cowan E.J, Beatson R.K, Ross H.J., Fright W.R, 2003, Practical Implicit Geological Modeling, 5th International Mining and Geology Conference, Bedingo, Victoria, The Australasian Institute of Mining and Metallurgy, str. 89-99. Černý, V., ...
    ... Uncertainty based production scheduling in open pit mining, SME Transactions, vol. 316 Dimitrakopoulos, R, 1998, Conditional simulation algorithms for modeling orebody uncertainty in open-pit optimization. International Journal of Surface Mining Reclamation and Environment, Vol. 2, No. 4, str. 173–179. ...

  • Hidrogeohemijska valorizacija esencijalnih mikroelemenata mineralnih voda Srbije

    Jana S. Stojković (2013-09-25)
    Mineralne vode još od davnina privlače pažnju ljudi i to kako u pogledu istraživanja iproučavanja, tako i u pogledu njihovog iskorišćavanja. Naročito je važno poznavanjesadržaja mikroelemenata u njima, jer su to komponente njihovog hemijskog sastavakoje ih odvajaju od tzv. „običnih“ malomineralizovanih voda.U ovom radu proučavani su odabrani esencijalni mikroelementi (fluor, bor, litijum,kalijum, stroncijum i silicijum), u mineralnim vodama Srbije, pri čemu je analiziranopreko 130 uzoraka mineralnih voda iz različitih geoloških sredina, to jest hidrogeološkihrejona. Cilj ovog istraživanja bio je ...
    esencijalni mikroelementi, faktori migracije, zakonomernosti rasprostranjenja, hidrogeohemijski procesi, multivarijantna statistička analiza, mineralne vode Srbije
    ... „Pravilnik o higijenskoj ispravnosti vode za piće.“ br. 42/98 i 44/99. 105. Sneath, P. H. A. and Sokal, R. R. (1973) Numerical taxonomy- the principles and practice of numerical classification. San Francisco: Freeman, W.H. 106. Солодов, Н. А., Балашов, Л. С. и Кременецкий, А. А. (1980) Геохимия ...
    ... 10.0), spatial distribution of microelements in mineral waters of Serbia has been studied (software package Esri ArcGIS 9.3), and hydrochemical modeling has been applied on a certain number of mineral water samples (software package USGS PHREEQC 2.18). The use of factor analysis allowed grouping ...
    ... microelements concentrations to the limits recommended by domestic and foreign drinking water regulations and guidelines. Applying hydrochemical modeling on chosen mineral water samples the presence of the most probable ion species of the analyzed microelements has been calculated, closely defining ...

  • Ontološki model upravljanja rizikom u rudarstvu

    Olivera Kitanović (2021)
    Rudarska proizvodnja obuhvata kompleksne tehnološke sisteme, što nameće potrebu za uspostavljanjem i unapređivanjem sistema upravljanja rizikom. Heterogenost i obim podataka neophodnih za upravljanje rizikom zahtevaju sistem koji ih na fleksibilan način integriše i omogućava njihovo optimalno korišćenje. Osnovni cilj ove disertacije je razvoj ontologije za domen rudarstva i na njoj zasnovanog modela za upravljanje rizikom. Njegova realizacija podrazumeva i implementaciju algoritama ekstrakcije informacija za popunjavanje ontologije, kao i odgovarajuće softversko rešenje. Razvoj modela obuhvata i značajno proširenje rudarskog korpusa, kao ...
    rudarstvo, rizik, upravljanje rizikom, procena rizika, ontologija, semantička mreža, ekstrakcija informacija, upravljanje znanjem, računarska lingvistika
    ... methods for evaluation and interpretation of the obtained results. Information technology tools were used for model development: UML for concept modeling, OWL for ontology development, SWRL rules for inference mechanism, query languages CQL for corpus and SPARQL for ontology. The research results ...
    ... (Evert 2005). Tehnikama obrade prirodnog jezika su ekstrahovani kandidati za sadržaj ontologije, pronalaženjem veza između 1 UML (engl. Unified Modeling Language) je standardni jezik za vizuelno prikazivanje objektnog modela 5 imeničkih fraza iz domena rudarstva i njihovih kolokacija. Takođe ...
    ... de Textes Journalistiques.” PhD Thesis, Tours. Galatescu, Alexandra, Adriana Alexandru, Corneliu Zaharia, and Stefan Kovacs. 2010. “Ontology-Based Modeling and Inference for Occupational Risk Prevention.” In SEMAPRO 2010: The Fourth International Conference on Advances in Semantic Processing, 205–12 ...

  • Optimizacija utovarno-transportnih sistema u funkciji planiranja površinskog kopa

    Mirjana V. Banković (2018-07-13)
    Profitabilna eksploatacija sve složenijih ležišta je težak zadatak koji zavisi odtemeljnog procesa analize, planiranja i projektovanja rudnika. Izvodljiv strateškiplan mora da zadovoljava društvena, regulatorna, tehnološka, geometrijska iekonomska ograničenja. Kako bi se postigao osnovni cilj, odnosno profitabilnost iodrživost rudarskog projekta na duži period, neophodno je unapređenjematematičkih modela i informatičke podrške procesima planiranja i optimizacijekoji će omogućiti efikasnu realizaciju ovih ciljeva...
    tehnološki model, integralni model, planiranje, optimizacija,utovarno-transportni sistem, neto sadašnja vrednost projekta
    ... planiranja koje se koriste u radovima vezano za površinske kopove uglja. Modeli su kreirani primenom jedinstvenog jezika za modeliranje (UML eng. Unified Modeling Language). UML (Rumbaugh et al., 2004) je široko primenjen grafički jezik modeliranja koji omogućava standardizovanu osnovu za kreiranje i slikovito ...
    ... Surface coal mining methods in Australia. In: ONARGAN, P. T. (ed.) Mining Methods. InTech. Rumbaugh, J., Jacobson, I., Booch, G., 2004, Unified modeling language reference manual, the, Pearson Higher Education. Sabour, S., Wood, G., 2009, Modelling financial risk in open pit mine projects: implications ...
    ... Surface strip coal mining handbook. South African Colliery Managers Association. Thorley, U., 2012, Open Pit Mine Planning: Analysis and system modeling of conventional and oil sands applications. PhD Thesis, Queen’s University. Thyssenkrupp, 2017, Available: www.thyssenkrupp-industrial-solutions ...

  • A Data Driven Approach for Raw Material Terminology

    Olivera Kitanović, Ranka Stanković, Aleksandra Tomašević, Mihailo Škorić, Ivan Babić, Ljiljana Kolonja (2021)
    The research presented in this paper aims at creating a bilingual (sr-en), easily searchable, hypertext, born-digital, corpus-based terminological database of raw material terminology for dictionary production. The approach is based on linking dictionaries related to the raw material domain, both digitally born and printed, into a lexicon structure, aligning terminology from different dictionaries as much as possible. This paper presents the main features of this approach, data used for compilation of the terminological database, the procedure by which it has ...
    sirovine, rudarstvo, terminologija, rečnik, terminološka aplikacija, mobilna aplikacija, digitizacija, leksički podaci, korpusi, otvoreni povezani podaci
    ... [57,58]). The Python script prepared in the form of a jupyter notebook was published at github [57]. Current work of the Ontolex group is focused on modeling word embeddings, collocations and similar words and we will add this feature when it becomes stable. An example of ontolex-lemon frequency and attestation ...

  • Prirodno prečišćavanje i stimulisana bioremedijacija podzemnih voda zagađenih naftnim ugljovodonicima

    Nenad M. Marić (2016-09-26)
    Disertacija se konceptualno sastoji iz dva dela kojima je obuhvaćen pasivan (prirodnoprečišćavanje) i aktivan remedijacioni pristup (stimulisana bioremedijacija) kodpodzemnih voda zagađenih naftnim ugljovodonicima.U prvom delu disertacije prikazani su rezultati osmatranja procesa prirodnogprečišćavanja u podzemnim vodama na lokaciji istorijskog zagađenja kerozinom.Tragovi zagađenja naftnim ugljovodonicima pronađeni su 20 godina nakon prosipanjakerozina. Ovo je stvorilo osnovu za proučavanje efekata dugotrajne izloženostipodzemnih voda procesima biodegradacije u terenskim uslovima. Uočeno je da sesnižene koncentracije elektron akceptora (O2, NO3-, SO42-) i povišene koncentracijemetaboličkih produkata biodegradacije ...
    podzemne vode, naftni ugljovodonici, kerozin, prirodno prečišćavanje,stimulisana bioremedijacija
    ... IM, Eganhouse RP, Siegel DI, Bennett PC (1993) Crude oil in a shallow sand and gravel aquifer-III. Biogeochemical reactions and mass balance modeling in anoxic groundwater. Appl Geochem 8, 569– 586. Nenad M. Marić ...
    ... JP, Chai EY, Colthart JD, Klein CL (1989) Aerobic biodegradation of beznene, toluene and xylene in a sandy aquifer: data analysis and computer modeling. Ground water, vol. 27, no. 6, 267-312. 30. Christensen T, Bjerg P, Banwart S, Jakobsen R, Heron G, Albrechtsen HJ (2000) Characterization of ...

  • Fuzzy Model for Risk Assessment of Machinery Failures

    Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković (2020)
    The main goal of this research was the development of an algorithm for the implementation of negative risk parameters in a synthesis model for a risk level assessment for a specific machine used in the mining industry. Fuzzy sets and fuzzy logic theory, in combination with statistical methods, were applied to analyze the time picture state of the observed machine. Fuzzy logic is presented through fuzzy proposition and a fuzzy composition module. Using these tools, the symmetric position of the ...
    fazi teorija, rizik, otkaz rudarskih mašina
    ... risk indicators of each corresponding class (in order to assess the risk level). Symmetry 2020, 12, 525 9 of 26 3.2.3. Fuzzification of Numerical Data Numerical data on workplace injuries and the environmental pollution caused by failures can be included into the risk indicator assessment model through ...
    ... used, and the symmetric fuzzy inference approach was used in an outcome calculation. The main benefit of the proposed model is being able to use numerical and linguistic data in a risk assessment model. The proposed risk assessment model, using fuzzy logic conclusions and min–max composition, was used ...
    ... used, and the symmetric fuzzy inference approach was used in an outcome calculation. The main benefit of the proposed model is being able to use numerical and linguistic data in a risk assessment model. The proposed risk assessment model, using fuzzy logic conclusions and min-max composition, was used ...

  • Процена ризика од загађивања водних ресурса под утицајем напуштених рударских радова на простору Србије

    Nebojša B. Atanacković (2018-08-31)
    Велики број напуштених рударских радова и ограничена средства за рекултивацијуи ремедијацију деградираних простора подстакле су развој метода за издвајањеприоритетних локација на које је потребно усмерити даља истраживања. У датомконтексту, у склопу израде дисертације спроведене су научно-истраживачкеактивности које су за предмет имале анализу утицаја значајнијих напуштенихрударских радова на водне ресурсе на простору Србије јужно од Саве и Дунава.Разматрање предметне проблематике извршено је кроз развој и примену семи-квантитативне методологије за анализу ризика од загађивања површинских иподземних вода на регионалној размери. Примењена ...
    анализа ризика, водни ресурси, водна тела, рудничке воде, рударскиотпад, аналитички хијерархијски процеси, кластер анализа, математичка теоријаатрибута, функције припадности, семи-квантитативне методе
    ... Wastes, Short Course Series Vol 31, Mineralogical Association of Canada, 51-72. 147. Sneath P.H.A. and Sokal R.R. (1973) Numerical taxonomy- the principles and practice of numerical classification. San Francisco: Freeman, W.H. 148. Sol V.M., Peters S.W.M., Aiking H. (1999) Toxic waste storage sites ...
    ... Pastorok A.R. et al., eds (2002) Ecological Modeling in Risk Assessment: Chemical Effects on Populations, Ecosystems, and Landscapes. Lewis Publishers 118. Pastorok A.R., Resit Akçakaya H., Regan H., Ferson S. and M. Bartell S. (2003) Role of Ecological Modeling in Risk Assessment. Human and Ecological ...
    ... загађивања водних ресурса модели су најчешће базирани на прорачуну транспорта и концентрације загађујућих супстанци (енгл. fate and transport modeling). Нумерички модели струјања подземних вода и транспорта загађујућих супстанци су нашли велику примену у пракси у области заштите подземних вода ...

  • Kontaktni metamorfizam gornjokrednih sedimentnih stena Rudnika

    Kostić N. Bojan (2021)
    Kontaktni metamorfizam gornjokrednih sedimentnih stena na planini Rudnik ispitivan je na uzorcima iz pet bušotina. Definisano je šest varijeteta krednih stena (protolita) koji čine dve litološke jedinice izgrađene od klastičnog, karbonatnog i klastično-karbonatnog materijala. Vulkanskom aktivnosti na Rudniku formirana su vulkanska tela koja se utiskuju duž slojevitosti sedimentnih stena, a neka ih presecaju u vidu dajkova. Starost ovog vulkanskog događaja određena je na 23.9 miliona godina. Ovaj miocenski vulkanizam doveo je do kontaktno metamorfnih promena sedimentnih stena i obrazovanja skarnova ...
    Rudnik, kontaktni metamorfizam, sedimentne stene, hornfels, skarn, granati, vezuvijan
    ... changes in conditions of contact metamorphism during garnet crystallization. According to pressure-temperature diagram based on thermobarometric modeling the temperature of 430±30° C and pressure up to 800 bars were inferred. During the first stage, i.e. prograde metamorphism formed garnet and pyroxene ...

  • Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal

    Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)
    Polimeri i plastika, opšta hemija
    ... plastics mixtures. Int. J. Hydrogen Energy 2011, 36, 9014–9022. [CrossRef] 40. Kathiravale, S.; Yunus, M.N.M.; Sopian, K.; Samsuddin, A.; Rahman, R. Modeling the heating value of municipal solid waste. Fuel 2003, 82, 1119–1125. [CrossRef] 41. Han, J.; Yao, X.; Zhan, Y.; Oh, S.Y.; Kim, L.H.; Kim, H.J. A ...

  • Application of machine learning for diagnosing the operation of a deep well pump in oil production

    Maja Trikić (2024)
    This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.
    deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost
    ... faults. 22 • ForRegression a.Linear Regression - Can be used to predict numerical values such as vibration levels or pressure that may indicate the pump's condition. b.Polynomial Regression - Used for modeling complex relationships between variables, which can help in predicting complex ...
    ... dynamogram with a high degree of reliability are sought. 3.3 Importance in evaluating pump performance Mathematical models, both analytical and numerical, enable the transformation of recorded values for stroke and load of the smooth rod at the surface (boundary and initial values) into stroke and ...
    ... adapt to data to predict future observations or patterns. It is crucial to evaluate the relationship between the model and features. Features are numerical representations derived from available data and are linked to the model. Feature engineering is the process of shaping the most suitable features ...