Претрага

Упит dcterms_subject_txt:multi-word unit

292 items

  • 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
    ... analysis i Solutions (5 error analysis Figure 4.2 Machine learning approach If spammers notice that your filter blocks messages containing the word "Your" in the subject line, they might start using the phrase "For You" to bypass the filter. In a traditional programming approach, you would need ...
    ... The formula for the F1 score is shown in Equation (4). 2*precision*recall (4) Faiscor = — precision+recall Unlike binary classification, in multi-class classification, the F1 score is calculated for each class individually. If a single F1 score is needed for easier comparison, the F1- macro ...
    ... Int. J. Comput. Intell. Syst. 2018 9. Takacs, G. Sucker-Rod Pumping Manual; PennWell Books: Tulsa, OK, USA, 2003Curvelet Transform and sparse multi-graph regularized extreme learning 10. Wang, C.; Deng, C.; Wang, S. Imbalance-XGBoost: Leveraging weighted and focal losses for binary label-imbalanced ...

  • GIS Application Improvement with Multilingual Lexical and Terminological Resources

    Ranka Stanković, Ivan Obradović, Olivera Kitanović (2010)
    ... illustrate semantic expansion, the query for geological unit retrieval with the term ‘facie’ (‘facija’ in Serbian) in their description field was submitted twice: once without and once with semantic expansion. The first query contained only the word ‘facija’, whereas the second, expanded query included ...
    ... WS4QE, was used: if the first word is an adjective in nominative singular and the second word is a noun in nominative singular and their gender and animate/inanimate category agree, then the transducer NC_AXN should be used: <Word ID="1" POS="A" Case="1" Anim="$a" ...
    ... field was submitted twice: once without and once with morphological expansion. The first query contained only the word ‘krečnjak’. In the second query all inflected forms of this word, generated using morphological dictionaries and transducers, namely ‘krečnjak, krečnjaka, krečnjaku, krečnjakom ...

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... Karst Unit, 4. Pre-Karst and Bosnian Flysch Unit, 5. East Bosnian-Durmitor Thrust Sheet, 6. Dinaric Ophiolitic Belt, 7. Western Vardar Ophioliic Unit, 8. Drina-Ivanjica Thrust Sheet, 9. Jadar-Kopaonik Thrust Sheet, 10. Sava Zone, 11. Eastern Vardar Ophiolitic Unit, 12. Serbo-Macedonian Unit, 13. ...
    ... an Unit (as part of the Dacia Mega Unit) overthrust the Vardar zone. The Serbo-Macedonian Unit includes a medium- to high-grade metamorphic Neoproterozoic to Early Paleozoic gneissic basement and sub-greenschist to epidote- amphibolite grade Paleozoic successions. The Serbo-Macedonian Unit, pa ...
    ... an external foredeep (Figure 1). The Dinarides consist of the following units: East Bosnian-Durmitor Unit, Dinaric (External) Ophiolite Belt, and Drina-Ivanjica Unit. The East Bosnian-Durmitor Unit includes a Palaeozoic basement, covered by unmetamorphosed Triassic to Paleogene neritic and pelagic ...

  • Отварање и припрема лежишта за примену коморно-стубних метода откопавања

    Никола Станишић (2024)
    Циљ мастер рада је да кроз теоријски преглед и практични пример, прикаже процес отварања и припреме лежишта за примену коморно-стубне методе окопавања. Предмет рада је мало лежиште олово-цинкане руде, а од варијација коморно-стубних метода откопавања, изабрана је коморно-стубна метода етажног откопавања са откопавањем одoздо на доле. Рад се бави темама одабира и описа начина отварања и припреме лежишта, методама откопавања, технологијом израде просторија и откопавања лежишта, организацијом рада и проценом трошкова и економичности експлоатације.
    коморно-стубна метода, отварање, припрема, технологија, откопавање
    ... BodyForca Cauka 4.13 – Ipukas uhO0ykogaHux HanoHa 3a npocmopuje npoduna THIT-I (cogpmaep ,, Phase2 “) 26 Strength Factor Initial Element | Unit Weight | _Elastic Loading (MN/m3} Type Material Type Suength | Angle Friction Angle al leg) |[residual) (deg ips ldce) (peak)(dem) (residual) ...
    ... (pakropa craOMJIHOcCTH, KOJH Cy MH3HajL rpaHHIme JIOMa, MO)KE Ce 3aKJbyuuTH a he rpocTopuje ca npobano THII-II oru craOugimHe. Initial Element | Unit Weight Loading (MN/m3) Elastic Type Young's Modulus (MPa} Failure Criterion Material Type Tensile Strength (MPa)} Dilation Angle ...
    ... THIT-II (codpmaeep „ Phase2 “) 27 Sserength Facscr tension z > s 4 4. š unbounded shear rension Initial Element Loading Unit Weight | Elastic (MN/m3} Type Youngs Modulus (MPa) Type Tensile Strength (MPa} Dilation Angle (deg) de lr deg| es FieldStress and ...

  • Electronic Dictionaries - from File System to lemon Based Lexical Database

    Ranka Stanković, Cvetana Krstev, Biljana Lazić, Mihailo Škorić (2018)
    In this paper we discuss some well-known morphological descriptions used in various projects and applications (most notably MULTEXT-East and Unitex) and illustrate the encountered problems on Serbian. We have spotted four groups of problems: the lack of a value for an existing category, the lack of a category, the interdependence of values and categories lacking some description, and the lack of a support for some types of categories. At the same time, various descriptions often describe exactly the same ...
    ... generation of dictionary candidates, with their lexical and derivation variants. This automatic procedure enabled migration of all 26 simple word and 15 multi-word unit Serbian dictionary files with more than 150,000 lexical entries. Keywords: lexical database, lemon, electronic dictionaries, lexical model ...
    ... LexicalEntry, representing a unit of analysis of the lexicon, which encompasses a set of inflected forms that are grammatically related, and a set of base meanings that are associated with all of these forms (Figure 2). A lexical entry is a (single) word, multi-word expression, acronym or affix ...
    ... tasks (Courtois and Silberztein, 1990). A dictionary of lemmas can con- tain simple-word lemmas (DELAS) or multi-word lemmas (DELACF), producing, respectively, a dictionary of simple- word forms (DELAF) or multi-word forms (DELACF).1 Traditionally, dictionaries of lemmas are prepared and maintained ...

  • Bridging Computational Lexicography and Corpus Linguistics: A Query Extension for OntoLex-FrAC

    Christian Chiarcos, Ranka Stanković, Maxim Ionov, Gilles Sérasset (2024)
    OntoLex, dominantni standard zajednice za mašinski čitljive leksičke resurse u kontekstu RDF-a, Linked Data i tehnologija Semantičkog veba, trenutno se proširuje sa posebnim modulom za Frekvencije, Primere i Informacije zasnovane na Korpusu (OntoLex-FrAC). Predlažemo novi komponent za OntoLex-FrAC, koji se bavi inkorporacijom korpusnih upita za (a) povezivanje rečnika sa korpusnim mašinama, (b) omogućavanje RDF baziranih web servisa da dinamički razmenjuju korpusne upite i podatke odgovora, i (c) korišćenje konvencionalnih upitačkih jezika za formalizaciju unutrašnje strukture kolokacija, skica reči i ...
    standardizacija, digitalna leksikografija, OntoLex, upiti korpusa, povezani podaci, Lingvistički povezani otvoreni podaci

  • SrpELTeC: A Serbian Literary Corpus for Distant Reading

    Ranka Stanković, Cvetana Krstev, Duško Vitas (2024)
    U članku je predstavljen SrpELTeC, korpus razvijen u okviru akcije COST Distant Reading for European Literary History (CA16204). Svi romani u SrpELTeC-u su odabrani, pripremljeni i obeleženi korišćenjem zajedničkih principa uspostavljenih za sve jezičke zbirke u Evropskoj zbirci književnog teksta (ELTeC). Navedeni su izazovi i rešenja u pripremi SrpELTeC od nule. Svi romani su ručno kodirani u TEI sa bogatim metapodacima i strukturnim napomenama. Automatska anotacija je uključivala POS-označavanje, lematizaciju i imenovane entitete, oslanjajući se na resurse za obradu ...
    digital humanities, Serbian literature, text corpora, distant reading , linked data, named entity recognition, text analytics

  • Modeliranje tehnoloških procesa u rudarstvu u uslovima nedovoljnosti podataka primenom teorije grubih skupova

    Zoran M. Štirbanović (2015-07-01)
    Rudarstvo, a u okviru njega i priprema mineralnih sirovina, se odlikuje složenošću tehnoloških procesa što je posledica velikog broja uticajnih parametara. Samim tim je potrebno biti veoma obazriv prilikom donošenja odluka u oblasti rudarstva. U cilju što efikasnijeg funkcionisanja procesa, moguće je primeniti različite metode koje služe za pojednostavljenje procesa odlučivanja. Jedna od takvih metoda jeste i teorija grubih skupova. Ona predstavlja relativno novu matematičku teoriju koja je pogodna za razumevanje nepreciznih i nepotpunih podataka kao i za otkrivanje ...
    rudarstvo, priprema mineralnih sirovina, teorija grubih skupova, višekriterijumsko odlučivanje, flotacijsko jalovište, flotacijski kolektor, flotaciona mašina
    ... verified by multi-criteria decision-making methods: VIKOR, AHP, ELECTRE, PROMETHEE and TOPSIS. Based on results it was concluded that rough set theory was successfully applied in all three problems. The superposition of the results obtained by the rough set theory with the results from other multi-criteria ...
    ... s demonstrate the high sensitivity of the rough set theory in terms of multi-criteria decision-making and define its usefulness in terms of insufficiency of data. Key words: mining, mineral procesing, rough set theory, multi-criteria decision-making, flotation tailings landfill, flotation collector ...
    ... kompanija. Cheng et al. [16] su primenili teoriju grubih skupova za predviđanje cene akcija. Oni predlažu hibridni model za prognozu, koji koristi multi-tehničke indikatore kako bi predvideo trendove cena akcija. Zoran Štirbanović, DOKTORSKA DISERTACIJA: Modeliranje tehnoloških procesa u rudarstvu ...

  • Novel Hybrid MPSI–MARA Decision-Making Model for Support System Selection in an Underground Mine

    Miloš Gligorić, Zoran Gligorić, Suzana Lutovac, Milanka Negovanović, Zlatko Langović (2022)
    objektivne težine kriterijuma, MPSI metoda, višekriterijumsko odlučivanje, MARA metoda, izbor sistema podgrade, podzemna eksploatacija

  • Concepts for Improving Machine Learning Based Landslide Assessment

    Miloš Marjanović, Mileva Samardžić Petrović, Biljana Abolmasov, Uroš Đurić (2019)
    Katastar klizišta, Podložnost, Hazard, Mašinsko učenje, Uzorkovanje, Validacija

  • Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules

    Svetlana Melentijević, Zoran Berisavljević, Dušan Berisavljević, Claudio Olalla Marañón (2024)
    The stability analysis of homogeneous rock slope following the Hoek–Brown failure criterion under the hypothesis of different flow rules is performed based on limit equilibrium and finite element methods. The applied failure criterion is the generalized Hoek–Brown that can be introduced as a shear/normal function in analysis applying different flow rules. The results are compared with those obtained by the application of equivalent shear strength parameters of the Mohr–Coulomb criterion, considering that this is still the most widely used ...
    Kružna klizna površ, Huk-Braunov kriterijum loma, Kriterijum popuštanja, Smičuća/normalna funkcija, Nivo napona, Verovatnoća i parametarska analiza

  • Razvoj ARCGIS geobaze površinskog kopa korišćenjem UML CASE alata

    Aleksandra Tomašević, Ljiljana Kolonja, Ivan Obradović, Ranka Stanković, Olivera Kitanović (2012)
    ... general definition, geographic information systems are a powerful set of tools for collecting, storing, searching, transforming and presentation of real word spatial data [Burrough & McDonnel, 2006]. Simply put, spatial or geographic data are data on geographic entities, that is, data that identify the ...
    ... started with the creation of the PovrsinskiKop package, within the Workspace package, followed by the creation of class diagrams. A class is the basic unit of the system model, where class examples are objects with the same structure, behavior, relations and semantics. For example, the class Busotina ...

  • Quantitative analysis of syllable properties in Croatian, Serbian, Russian, and Ukrainian

    Biljana Rujević, Marija Kaplar, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Jan Mačutek (2021)
    slogovi, distribucija rang-preciznost, slovenski jezici

  • 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

  • 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
    ... cal characterization of samples are given in Tables 4 and 5 and Figures 1–6. Table 4. Physical properties of fresh and hardened mortar. Parameter Unit E-M P10-M P15-M P20-M P25-M Consistency: by flow table mm 205 ± 7.9 187 ± 7.2 169 ± 7.5 152 ± 6.4 136 ± 6.0 Bulk density of fresh mortar kg/m3 2248 ...
    ... mortars kg/m2 7.65 ± 0.104 5.19 ± 0.122 5.88 ± 0.134 5.67 ± 0.115 5.11 ± 0.128 Table 5. Physical properties of fresh and hardened concrete. Parameter Unit E-C P10-C P15-C P20-C P25-C Consistency: slump test mm 240 ± 12.3 180 ± 11.6 140 ± 10.4 90 ± 8.2 20 ± 6.5 Air content in fresh concrete % 2.5 ± 0.25 ...

  • Development of an integrated model for open-pit-mine discontinuous haulage system optimization

    Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović (2024)
    equipment selection, mine mechanization, expert judgment, linguistic variables, MCDM, FAHP

  • Coal homogenization stockyard sizing “Tamnava – Zapad” case study

    Božo Kolonja, Dinko Knežević, Ranka Stanković, Dejan Stevanović, Detlef Trummer (2016)
    ... for the layer sizes to be equal, the stacker has to change travel speed depending on the quantity of coal arriving at the stockyard. The regulation unit applied is mass per minute. Thus the stacking speed for the selected method depends on the number of layers, the stacking capacity and the cons ...

  • A business intelligence approach to mine safety management

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić (2016)
    ... ion, “drill-down” and “slicing and dicing” [7]. In mine safety it is necessary to follow several attributes related to injuries, perform their multi-dimensional analysis, as well as display data in different forms. Data are presented in the form of OLAP cubes that contain measures and dimensions ...
    ... RudOnto, where dimensions of OLAP cubes are concepts of RudOnto ontology, and its hierarchy of concepts is mapped to build flexible OLAP models with multi-level hierarchies. The software also contains tools for calculations, key performance indicators (KPIs), actions, partitions, aggregations, etc ...
    ... professional and soft skill training, on the directly responsible supervisor, and on possible eyewitnesses of the accident. Further, the organizational unit and the workplace of the worker are recorded, while the job that the worker was performing is selected from a catalog and additionally described ...

  • Mine ventilation system planning using genetic algorithms

    Nikola Lilić, Ranka Stanković, Ivan Obradović (1997)
    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 methods

  • The different approaches in seismic stratigraphy interpretation

    Dejan Radivojević (2018)
    U tekstu su prikazana dva osnovna pristupa u seizmostratigrafskoj interpretaciji. Prvi kao polaznu osnovu ima seizmičke sekcije, čija se interpretacija u kasnijoj fazi koreliše sa bušotinskim podacima. Drugi u prvoj fazi analizira podatke dobijene dubokim bušenjem koji se kasnije korelišu sa seizmičkim sekcijama. Prikazan je hronološki redosled i objašnjen postupak pri seizmostratigrafskoj interpretaciji oba pristupa. Ovakav način interpretacije omogućio je naftnim kompanijama detaljnije i preciznije sagledavanje geoloških odnosa, smanjenje rizika istraživanja i racionalnije projektovanje razradnih bušotina.
    seizmostratigrafija, istraživanje nafte i gasa, karakteristične seizmičke sekvence, seiz-mofacijalna analiza
    ... [4] Mitchum R. M, Vail P. R. & Thompson S, Seismic stratigraphic and global changes in sealevel, part 2: The depositional seqence as a basic unit for strai- graphic analysis. In: Payton (Eds.), Seismic Strati- graphy: Application to Hydrocarbon Exploration, AAPG-Mem., 26, p 53-62. Tulsa, Oklahoma ...