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Упит dcterms_subject_txt:economical evaluation

362 items

  • Coupling of artificial intelligence methods in the development of hybrid intelligent systems

    Ranka Stanković, Ivan Obradović, Nikola Lilić (2001)
    In this paper we present an approach which couples various artificial intelligence (AI) methods in the solution of complex problems that cannot adequately be solved by a single AI method. We argue that the resulting, hybrid intelligent systems (HIS) can be successfully implemented with the use of available AI software libraries. Different coupling methods are analyzed and a classification of hybrid systems based on the chosen method is given. Two case studies of hybrid systems used in mining engineering ...
    hibridni inteligentni sistemi, spregnuti sistemi, metode veštačke inteligencije, rudarske primene veštačke inteligencije
    ... simulation in mine ventilation networks, transformed into the SimVent software package is composed of the following modules: 1) The module for the evaluation of air flow and pressure distribution in the ventilation system; 2) The module for the analysis of the heat pattern in the mine; 3) The module ...

  • Препреке декарбонизацији система даљинског грејања у Србији - ставови представника топлана

    Марија Живковић, Дејан Ивезић, Бобан Павловић, Дејан Стојановић (2024)
    Производња топлоте у системима даљинског грејања у Републици Србији тренутно се заснива искључиво на процесима сагоревања, с доминантним уделом природног гаса из увоза. Иако су технологије за коришћење обновљивих и алтернативних извора енергије добро познате, њихова примена у системима даљинског грејања у Републици Србији још увек је занемарљива (око 2%). Како би се убрзао и олакшао процес транзиције ка обновљивим изворима енергије и разумело тренутно стање и перспектива, спроведена је анкета међу представницима топлана Србији. Циљ је био ...
    системи даљинског грејања, препреке, обновљиви извори енергије, Србија

  • Vebran Web Services for Corpus Query Expansion

    Ranka Stanković, Miloš Utvić (2020)
    U ovom radu se govori o razvoju veb usluga Vebran i njihovoj primeni u poboljšanju pretraživanja korpusa. Veb-servisi Vebran koriste se za konsultovanje spoljnih leksičkih izvora za srpski jezik (uglavnom elektronski morfološki rečnici i srpski Vordnet) i proširivanje korisničkih upita radi dobijanja relevantnijih rezultata iz srpskih korpusa.
    corpus search, web service, Serbian lexical resources, query expansion
    ... Enhanced Search of Multilingual Digital Li- braries of E-Journals”. In Proceedings of the Eighth International Confer- ence on Language Resources and Evaluation (LREC),(Istanbul, Turkey, 2012, 1710–1717 Stanković, Ranka. “Modeli ekspanzije upita nad tekstuelnim resursima”. Phdthesis, Univerzitet u Beogradu ...
    ... Dictionaries - from File System to lemon Based Lexical Database”. In Proceedings of the Eleventh International Conference on Language Re- sources and Evaluation (LREC 2018), McCrae, J. P., C. Chiarcos, T. De- clerck, J. Gracia and B. Klimek, 48–56. Paris, France: European Language Resources Association (ELRA) ...

  • Употреба веб платформе Омека за дигиталне библиотеке из домена рударства

    Александра Томашевић, Биљана Лазић, Далибор Воркапић, Михаило Шкорић, Љиљана Колоња (2017)
    У овом раду биће представљена Омека, веб платформа за приказивање дигиталних колекциjа и систем за управљање њиховим садржаjем. Њену примену у области техничких наука, а конкретно у области рударства, приказаћемо на примеру дигиталне библиотеке ROmeka@RGF. За Омеку смо се определили првенствено због чињенице да jе jедноставна за коришћење, има обимну пратећу документациjу и не захтева уско специфичне информатичке вештине што jе чини приступачном за већину корисника, а нарочито за рударске инжењере, коjима jе ова дигитална библиотека првенствено намењена. Документа ...
    Омека, дигиталне библиотеке, рударство
    ... enhanced search of multilingual digital li- braries of e-journals”. In Proceedings of the Eighth International Confe- rence on Language Resources and Evaluation (LREC), Istanbul, Turkey, 1710–1717, 2012. http://www.lrec-conf.org/proceedings/lrec2012/ pdf/375_Paper.pdf Stanković, Ranka, Cvetana Krstev, Biljana ...
    ... “Rule-based Automatic Multi-Word Term Extraction and Lemmatization”. In Proceedings of the 10th International Conference on Language Resources and Evaluation, LREC, 507–514, 2016. http://www. lrec-conf.org/proceedings/lrec2016/pdf/1033_Paper.pdf Stanković, Ranka М. “Modeli ekspanzije upita nad tekstuelnim ...

  • The Fuzzy–AHP Synthesis Model for Energy Security Assessment of the Serbian Natural Gas Sector

    Aleksandar R. Madžarević, Dejan D. Ivezić, Miloš L. Tanasijević, Marija A. Živković (2020)
    Natural gas is used for the production of almost 20% of total energy today. The natural gas security of the Republic of Serbia is an urgent strategic, political and security issue. Serbia is one of the most vulnerable countries in Southeast Europe, because it only has one supply route. This study is a contribution to efforts to better understand the factors affecting energy security through the implementation of a new methodology based on the fuzzy–AHP synthesis model for measuring ...
    energetska bezbednost, prirodni gas, fazi AHP, AHP višekriterijumska analiza, fazi teorija
    ... sector of the Republic of Serbia and infrastructure development plan; Section 4 demonstrates the application of the proposed methodology for the evaluation of the energy security assessment for the natural gas sector in Serbia; Section 5 is reserved for results of the case study; Section 6 provides ...
    ... are values of linguistic variable or linguistic value. In that case, linguistic modifiers are very, many, etc. The fuzzy–AHP synthesis model for evaluation of energy security assessment of energy development scenarios is explained in detail in this section. 2.1. Indicator Structure An integral analysis ...
    ... for the purpose of analyzing the partial indicators of administrative applicability (A1) and indirect environmental effect (E3) to conduct expert evaluation. Analysts whose area of business interest is closely related to the energy sector of the Republic of Serbia were interviewed. The questionnaire contained ...

  • 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
    ... the assumptions made to set up the model design and the selection of the appropriate performance metrics (PETSCHKO et al. 2014). Furthermore, the evaluation of reliability consists of changing some of the model integral parts and obtaining numerous variations of the outcome susceptibility maps, up ...
    ... lity Mapping on the Peloponnese Peninsula, Greece.– Geoscienc- es, 4, 176–190. doi:10.3390/geosciences4030176 CHANG, H. & KIM, N.K. (2004): The evaluation and the sensitivity analysis of GIS- based landslide susceptibility models.– Geosciences Journal, 8/4, 415–423. doi: 10.1007/BF02910477 CONSTANTIN ...
    ... Sciences, 19, 668–676. doi: 10.1016/j.sbspro.2011.05. 184 JOVANOVSKI, M., ABOLMASOV, B. & PESHEVSKI, I. (2013a): Analyses of Landslide Hazard Evaluation Factors Using Polynomial Interpolation.− In: MAR- GOTTINI, C., CANUTI, P. & SASSA, K. (eds.): Landslide Science and Practice. Vol.1., Landslide ...

  • 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

  • An Integrated Environment for Management and Exploitation of Linguistic Resources

    Ranka Stanković, Ivan Obradović (2009)
    ... Vitas, I. Obradović, “WS4LR: A Worksta- tion for Lexical Resources”, Proceedings of the 5th International Con- ference on Language Resources and Evaluation, LREC 2006, Genoa, Italy, pp. 1692-1697, 2006. [7] M. Silberztein, “ INTEX: a Finite State Transducer toolbox”, in Theo- retical Computer Science ...
    ... Tools to Improve the Performance of Web Search Engines”, in Proceedings of the Sixth Interantional Conference on Language Resources and Evaluation (LREC'08), Marrakech, Morocco, European Language Resources Association (ELRA), May 2008. [13] R. Stanković “Improvement of geodatabase queries ...

  • Some models for determination of parameters of the soil oscillation law during blasting operations

    Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić (2018)
    ... on the reduced distance R. In order to assess the degree of connection between v and R, we have used the curved line dependency index ρ [9]. The evaluation of the relationship degree of two variables [5] to values of the curved line dependency index ρ is given in the following survey: ‚ 0.0 < ρ < 0 ...
    ... differences are one after another ε1, ε2, ... εN, then it is: S “ d ε2 1 ` ε2 2 ` . . . ` ε2 N N (27) According to this criterion, for the evaluation of convenience of the obtained functional correlation, the following relations are valid: Energies 2016, 9, 617 7 of 15 ‚ if |εmax| ě 3S, the ...

  • The external aggregation Newton's method for solving nonlinear equations and applications

    Marija Paunović, Dejan Ćebić, Nebojša Ralević (2020)
    Њутнов метод, агрегациона функција, ред конвергенције

  • Development Of The Serbian Geological Resources Portal

    Ranka Stanković, Jelena Prodanović, Olivera Kitanović, Velizar Nikolić (2011)
    ... North-Western Serbia 2007-2011, FILIPOVIĆ, I. & JOVANOVIĆ, D. 2011. FMG: Synthesis of geological research of jewelry mineral resources of Serbia with the evaluation of potential 2010-2012, MILADINOVIĆ, Z. 10 Projects funded by MEMSP. FMG: Geological bibliography of the Republic of Serbia the ranking of search ...

  • Analysis and visualization of geophysical well-logging data from closely spaced boreholes

    Branislav Sretković, Ivana Vasiljević, Dimitry Sidorov - Biryukov (2024)
    Geophysical logging measurements for determining the condition of the rock mass on the dam profile and locating the predisposed directions of water circulation and loss from the reservoir were conducted in four boreholes distributed at a close distance. The survey was carried out in a typical karst terrain, which is an additional challenge for defining the geological model, especially in terms of water retention. That kind of data set provides an excellent opportunity for a new approach to analysis ...
    well-logging in karst, water loss, data correlation, data fusion
    ... assessment for large objects such as dams (Sretković and Vučković, 2020). 'The use of geophysical characterization of karst systems can provide an economical and non-invasive alternative _ for · extracting information about #cavities, · sinkholes, pathways for water “ infiltration as well as the ...
    ... measured logs were caliper (D), temperature (T), borehole fluid (mud) resistivitiy (Rm) and flowmeter (FM). Flowmeter data were applied in evaluation of the results, while other logs were also useful in checking the results. That kind of data set provides an excellent opportunity for a new ...

  • Design and drilling of wells in formations with high pressure

    Vojin Solomun (2024)
    Objectives of this Thesis are to: - Develop an awareness of the challenges presented from elevated temperatures and pressures in well construction. - Learn the key differences between ―normal‖ condition wells and HPHT wells. - Understand some of the indicators of thermal- and pressure-related problems. - Understand the responses which may be made to mitigate high pressure and high temperature ,,HPHT‘‘ challenges while drilling wells. HPHT wells are an unavoidable consequence of the ever expanding search for oil and gas resources around the world. As wells are ...
    HPHT, well, challenges, design, oil and gas
    ... This monitoring unit must be equipped with an alarm which will indicate a drop in pH. - Scavengers: Zinc oxide - (ZnO) is a widely available, economical, additive and is the preferred scavenger for most applications; Basic zinc carbonate - is a complex compound containing both zinc carbonate and ...
    ... time preparing the hole by cooling it down so that evaluation tools are not damaged and their measurements are not adversely effected by the high temperature. Running tools on drillpipe to allow circulation/cooling while staging in evaluation tools may be the only way to obtain good results. This ...
    ... Inter-disciplinary capability; Culture; “Stop the Job” authority Training (as a team); Learning culture. 12 Some technical specifics: - Limited Evaluation Capabilities (wireline and “MWD” (Measurement While Driling)); - _ Low ROP (Rate of Penetration) in Producing Zone - hard rock; - Downhole ...

  • Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles

    Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović (2013)
    Kinetika i mehanizam reakcija supstitucije između [Ru(trpi)(bpi)Cl]+ sa nukleofilima gvanozin-5′-monofosfatom, L-histidinom, tioureom i dimetilsulfoksidom proučavani su spektrofotometrijski u 0,1 M NaClO4 na 310 K. Red reaktivnosti za odabrane ligande je: tiourea > gvanozin-5′-monofosfat > L-histidin > DMSO. Ovaj red je povezan sa elektronskim, strukturnim i hemijskim karakteristikama kompleksa i nukleofila. Reakcija supstitucije sa tioureom je proučavana na tri različite temperature (288, 298 i 310 K). Negativna entropija aktivacije DS = potvrđuje asocijativni način aktivacije. Formiranje kompleksa [Ru(trpi)(bpi)H2O]2+ sa ligandima ...
    Kinetika, Ravnoteža, Ru(II), L-Histidin, Guanozin-5' -monofosfat, Dimetilsulfoksid, Tiourea
    ... http://dx.doi.org/10.1007/s00706-013-1044-1 (L = heterocyclic nitrogen ligand) [22]. In particular just two compounds are undergoing clinical evaluation today, the indazole (ind) derivative cytotoxic to cancer cells [Hind]- trans-[RuCl4(ind)2], known as KP1019, and the imidazole (im) derivative ...
    ... literature [52]. The stability constants of hydrolytic complexes of [Ru(trpy)(bpy)H2O] 2? ion were determined in separate experiments. Thus, in evaluation of three-component equilibria (c), the binary models (a) and (b) were consid- ered as known. The concentration stability constants of the complexes ...

  • Open Educational Resources in Serbia

    Ivan Obradović, Ranka Stanković, Marija Blagojević, Danijela Milošević (2020)
    Open educational resources, BAEKTEL, Metadata portal
    ... education. Namely, in Article 46a of this Law, a Center for Educational Technology is envisaged within the Institute for Education Quality and Evaluation. With the competence of this Center, Item 4 stipulates that it “provides professional support, develops a methodology and instruments for the ...
    ... partner university for Tempus project 544482-TEMPUS-1-2013-1-IT-TEMPUS-JPHES. Participant in four Erasmus mobilities. Member of Commission for self-evaluation at faculty. Member of the organizational committee of several conferences. Participant in national and international project and project coordinator ...

  • Old or New, We Repair, Adjust and Alter (Texts)

    Cvetana Krstev, Ranka Stanković (2020)
    U ovom radu predstavljamo kako se e-rečnici i kaskade transduktora konačnih stanja implementirani u alatu Unitex mogu koristiti za rešavanje tri problema transformacije teksta: ispravljanje tekstova nakon OCR-a, vraćanje dijakritičkih znakova i prebacivanje između različitih jezičkih varijanti.
    ispravka teksta, OCR greške, restauracija dijakritika , jezičke varijante, elektronski rečnik, transduktori konačnih stanja
    ... errors (precisely, unknown words) may be reduced by 5% to up to almost 90%, which depends, naturally, on the initial number of errors A thorough evaluation results for the system for diacritic restoration was presented in details in (Krstev et al., 2018). The authors showed that on the average the precision ...
    ... (1957): 38–55 Neme, Alexis Amid and Sébastien Paumier. “Restoring Arabic vowels through omission-tolerant dictionary lookup”. Language Resources and Evaluation (2019): 1–65 Infotheca Vol. 19, No. 2, December 2019 79 Krstev C., Stanković R., “Old or new, we repair . . . ”, pp. 61–80 Ostrogonac, Stevan ...

  • 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
    ... 1. INTRODUCTION In modern oil industry, the efficiency and reliability of the production process play a crucial role in ensuring stable and economical operations. One of the most important elements in this process is the deep well pumps, which enable the extraction of oil from great depths of ...
    ... typically results in a shorter and more maintainable program and is often more accurate in identifying spam. 18 Ready for Use () problem ng Evaluation ol analysis i Solutions (5 error analysis Figure 4.2 Machine learning approach If spammers notice that your filter blocks messages containing ...
    ... Validation- The model is tested on a separate dataset to check accuracy and generalization. This step helps prevent overfitting. • Performance Evaluation a.Accuracy- Measures the model's accuracy in predicting the correct classes of pump conditions. Metrics such as precision, recall, and F1-score ...

  • Proširivanje upita zasnovano na leksičkim resursima

    Ranka Stanković, Ivan Obradović, Cvetana Krstev (2009)
    U radu je opisano kako se leksički resursi za srpski jezik i softverski alati, razvijeni u okviru Grupe za jezičke tehnologije Univerziteta u Beogradu, mogu koristiti za unapređenje postavljanja upita. Rezultati pretrage mogu biti značajno unapređeni korišćenjem različitih leksičkih resursa, kakvi su morfološki rečnici i semantičke mreže. Izloženi pristup može se iskoristiti i u Sistemu naučnih, tehnoloških i poslovnih informacija, jer je efikasno pretraživanje ovog dragocenog resursa, imajući u vidu njegovu heterogenost i obim, kao i preovladavajući tekstualni sadržaj, ...
    ... Vitas D., Obradović I., “WS4LR: A Workstation for Lexical Resources”, Proc. of the 5th International Conference on Language Resources and Evaluation, LREC 2006, Genoa, Italy, May 2006, pp. 1692- 1697. [7] Stanković R. (2008) „Improvement of geodatabase queries within GeolISS“, Pregled Nacionalnog ...

  • Developing Students’ Mining and Geology Vocabulary Through Flashcards and L1 in the CLIL Classroom

    Lidija Beko, Ivan Obradović, Ranka Stanković (2015)
    ... user-friendly, enable students to fill in a ready-made form and allow the professor to check, give feedback and mark the answers. During the evaluation, the professor may also select the answers which are to be included into a central terminology database provided that they satisfy previously ...

  • Увођење доменских и семантичких маркера за област рударства у српске електронске речнике

    Иван Обрадовић, Александра Томашевић, Ранка Станковић, Биљана Лазић (2017)
    ... “Rule-based Automatic Multi-word Term Extraction and Lemmatization”, In: Proc. of the 10th International Confer- ence on Language Resources and Evaluation, LREC 2016, Portorož, Slov- enia, pp. 23–28. Крстев и др. 2016: Cvetana Krstev, Anđelka Zečević, Duško Vitas, and Tita Kyriacopoulou, “NERosettafor ...