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Упит dcterms_subject_txt:Solid solution

320 items

  • 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
    ... more efficient solution of the paraffin deposition problems, it has defined a set of new actions that must be taken. The analysis of the application of chemical inhibitors has been performed, and the application of thermal method of tubing heating has been proposed. As a solution for the penetration ...
    ... dissertation provides scientific contribution that is reflected in the original model for a solution of the production problems at the Amal oilfield. The proposed solutions can improve production problems solution, provide more efficient management of the production process and increase oil production ...
    ... a new model has been defined for achieving the optimum oil production. The model consists of two major parts; the first one dealing with the solution of the production problems, and the second one dealing with the determination of optimum parameters for Gas Lift Operations. The originality of ...

  • 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
    ... more efficient solution of the paraffin deposition problems, it has defined a set of new actions that must be taken. The analysis of the application of chemical inhibitors has been performed, and the application of thermal method of tubing heating has been proposed. As a solution for the penetration ...
    ... dissertation provides scientific contribution that is reflected in the original model for a solution of the production problems at the Amal oilfield. The proposed solutions can improve production problems solution, provide more efficient management of the production process and increase oil production ...
    ... a new model has been defined for achieving the optimum oil production. The model consists of two major parts; the first one dealing with the solution of the production problems, and the second one dealing with the determination of optimum parameters for Gas Lift Operations. The originality of ...

  • Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils

    Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)
    MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteurii
    ... related behavior of selected strains and ureolytic reference was observed onto the solid nutrient medium rich in Urea (Figure 2). The crystal forms (marked with red arrows in Figure 2) were observed as reflected solid structures of each colony, but with different positions relative to the colony center ...
    ... Braun MB-series). The bacterial growth on Urea base agar, as well as colour changes, were checked after 7 days at 30 ◦C, while inorganic depositing on solid media with calcium ions was observed by light microscope (Zeiss Primo Star Binocular Microscope, Jena, Germany). Based on standard score results, bacterial ...
    ... Correspondence: oljasovljanski@uns.ac.rs; Tel.: +381-214-853-730 Abstract: Microbiologically induced CaCO3 precipitation (MICP) is a well-known bio-based solution with application in environmental, geotechnical, and civil engineering. The significance of the MICP has increased explorations of process efficiency ...

  • SASA Dictionary as the Gold Standard for Good Dictionary Examples for Serbian

    Ranka Stanković, Branislava Šandrih, Rada Stijović, Cvetana Krstev, Duško Vitas, Aleksandra Marković (2019)
    У овом раду представљамо модел за избор добрих примера за речник српског језика и развој иницијалних компоненти модела. Метода која се користи заснива се на детаљној анализи различитих лексичких и синтактичких карактеристика у корпусу састављених од примера из пет дигитализованих свезака речника САНУ. Почетни скуп функција био је инспирисан сличним приступом и за друге језике. Дистрибуција карактеристика примера из овог корпуса упоређује се са карактеристиком дистрибуције узорака реченица ексцерпираних из корпуса који садрже различите текстове. Анализа је показала да ...
    Српски, добри примери из речника, аутоматизација израде речника, издвајање својстава, Машинско учење
    ... examples and a supervised machine learning model for classification on standard and non-standard Serbian sentences, for further integration into a solution for present and future dictionary production projects. Keywords: Serbian; good dictionary examples; automatization of dictionary-making; feature ...
    ... the digitized text of the SASA dictionary into various standard structured formats and a lexical database was implemented using a custom software solution, with the primary goal to speed up the linear production process of the dictionary. This enabled the use of the lexical database for research purposes ...
    ... s): values lower of the 5th are assigned a score of 1, higher than 95th a score of 0, and between them linear interpolation is used. Besides the solution with multiple assessments of features, we have also used the analytic hierarchy process (AHP), where each feature value is converted to a numerical ...

  • Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)

    Filip Abramović, Miroslav Popović, Vladimir Simić, Vesna Matović, Radmila Šerović (2024)
    General Materials Science

  • Flood protection and water utilization of karst poljes: example of Gatačko Polje, Eastern Herzegovina

    Tina Dašić, Ljiljana Vasić (2020)
    Earth-Surface Processes,Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry,Global and Planetary Change

  • An Efficient Class of Iterative Root-Finding Methods with Applications

    Dejan Ćebić, Nebojša Ralević (2021)

  • Izbor rotornih bagera za proces revitalizacije: primer rotornih bagera SRs 1200 u rudarskom basenu Kolubara

    Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić, Goran Todorović, Dragan Novaković (2020)
    Revitalizacija je proces ili skup tehničkih zahvata na mašini kojim se vrši zamena svih dotrajalih ili oštećenih delova metalne konstrukcije. Sastavni deo procesa revitalizacije je i modernizacija zastarele elektro-mašinske opreme. Principi revitalizacije sasvim sigurno nisu sadržani u okviru redovnog godišnjeg ili dnevnog održavanja. Oni predstavljaju održavanje onih veličina koje su značajne za mašinu kao celinu (u ovom slučaju rotorni bager). U ovom radu su analizirani rotorni bageri oznake SRs 1200. Na površinskim kopovima rudarskog basena Kolubara takvih bagera ima ...
    Rotorni bageri, revitalizacija, SRs1200

  • 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
    ... resources, which can be used for producing various types of dictionaries, especially in specialized and terminological domains, seem to be the optimal solution. According to the findings of the Elexis project [2], the main positive changes in lex- icography in the last 10–15 years are mostly related to ...
    ... resources, which can be used for producing various types of dictionaries, especially in specialized and terminological domains, seem to be the optimal solution. According to the findings of the Elexis project [2], the main positive changes in lex- icography in the last 10-15 years are mostly related to ...
    ... database, a SPARQL endpoint with linguistic linked open data, on the one hand, and a web and mobile application, on the other, provides a technological solution that enables data management, continuous updat- ing, upgrading and expansion of available data, while various application forms (web and mobile) make ...

  • Određivanje zbijenosti starog komunalnog otpada

    Jovana Janković, Dragoslav Rakić, Irena Basarić Ikodinović, Tina Đurić (2021)
    Bez obzira na savremene tretmane komunalnog otpada u svetu, u Srbiji je i dalje najčešći vid odlaganja na komunalne deponije, pa zbijanje otpada predstavlja jednu od ključnih faza formiranja deponije. Na ovaj način znatno se smanjuje zapremina otpada, ubrzava proces degradacije i produžava radni vek deponije. Zbog toga su geotehničke karakteristike komunalnog otpada prilikom zbijanja, veoma bitne kako u fazi projektovanja tako i u fazi izgradnje deponije i optimizacije prostora. Tu se pre svega misli na maksimalnu suvu zapreminsku ...
    komunalni otpad, deponija, Proktorov opit, optimalna vlažnost, maksimalna suva zapreminska težina

  • Development of Open Educational Resources (OER) for Natural Language Processing

    Cvetana Krstev, Biljana Lazić, Ranka Stanković, Giovanni Schiuma, Miladin Kotorčević (2015)
    In this paper we present the development of an online course at the edX BAEKTEL platform named “Lexical Recognition in the Natural Language Processing (NLP)”. It is based on the course of the same name for PhD studies at the University of Belgrade, Faculty of Philology. There are not many courses in Computational Linguistics (CL) on OER platforms, and there is none in Serbian either for CL or NLP. We have developed this course in order to improve this ...
    E-Learning, Open Educational Resources, Computational Linguistics, Lexical Resources, edX
    ... institutions to publish their course materials (video lectures, course planning materials and evaluation tools as well as thematic content).The ICT solution includes several components:  OER repository on local edX platform (http://edx.baektel.eu).  BAEKTEL Metadata Portal (BMP) with metadata ...
    ... lessons. Video tutorials are made by recording content of the screen and instructors voice. We concluded that this is the most suitable solution for recording videos. It is the most practical way to demonstrate the application of Unitex. Graphical materials are used in the form of tables ...

  • Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines

    Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković (2021)
    The conditions under which contemporary surface mining operations is carried out obviously becoming increasingly complex. In such complex conditions, the optimization of haulage systems as the technological phase with the largest share in the total operating costs, is very important from the aspect of achieving profitability of the mining project. In a large number of cases, the application of traditional haulage systems with trucks (as the most dominant type of haulage in open pit mines) does not lead to ...
    In Pit Crushing and Conveying, IPCC, open pit mining, haulage, optimization, costs saving

  • WS4LR - a Worksation for Lexical Resources

    Cvetana Krstev, Ranka Stanković, Duško Vitas, Ivan Obradović (2006)
    Lexical Resources, Wordnet, Serbian
    ... at least 256MB (preferably 512MB) of internal memory. The solution consists of five projects, the main exe ConvertCP project and four .Net libraries of classes, as depicted in Figure 6. Figure 6. Project components of WS4LR solution The user selects resources he/she wants to work with and ...

  • Метода променљивих околина за решавање проблема p-центра са поузданом мрежом

    Јована Рађеновић, Стефан Мишковић, Оливера Станчић (2023)
    У овом раду је разматран проблем p-центра са поузданом мрежом (енгл. Reliable p-center facility location problem - RpCFLP). Решавање проблема подразумева иницијално успостављање p ресурса и алокације корисника, као и накнадну реалокацију корисника у складу са новонасталим сценаријима који садрже информације о онеспособљеним ресурсима и осталим измењеним улазним подацима. За решавање посматраног проблема предложена је метахеуристика заснована на итеративној варијанти основне методе променљивих околина (енгл. Iterated basic variable neighborhood search - IBVNS). Резултати тестирања предложене метахеуристике указују на њену ...
    Проблем p-центра, Робусна оптимизација, Метода променљивих околина

  • Digitalizacija u rudarstvu: Kreiranje sistema za efikasno poslovno izveštavanje

    Stevan Đenadić, Aleksandar Mirković, Veljko Rupar (2024)
    Proces donošenja odluka u oblasti rudarstva i geologije uslovljen je blagovremenim posedovanjem kvalitetnih podataka i informacija. Kompleksnost rudarskih procesa nalaže prikupljanje podataka na dnevnom odnosno na smenskom nivou. Podaci kao takvi bez analitičkog pristupa nisu dovoljni. Kako bi pristup podacima bio brz i efikasan neophodno je posedovanje adekvatnog digitalnog rešenja uz adekvatne centralizovane baze podataka. U ovom radu je dat pregled trenutne pozicije rudarstva sa aspekta digitalne transformacije kao i predlog jednostavnog prototipa u obliku digitalnog sistema za poslovno ...
    rudarstvo, digitalna transformacija, baze podataka
    ... such, without an analytical approach, is insufficient. For access to data to be quick and efficient, it is necessary to have an adequate digital solution along with appropriate centralized databases. This paper provides an overview of the current position of mining from the perspective of digital ...

  • An Integrated Environment for Management and Exploitation of Linguistic Resources

    Ranka Stanković, Ivan Obradović (2009)
    ... used for solving different tasks within the Group, and a web application named WS4QE, accompanied by sever- al web services, that enables the solution of various tasks via the web. Besides a short description of the linguistic resources for Serbian involved, we also describe how the functions ...
    ... supported by a grant from the Ser- bian Ministry of Science and Technological Development Another goal was their integration, which would render the solution of various tasks related to processing of e-texts much easier. Thus a tool, with the acronym WS4LR (Work- station for Linguistic Resources) ...
    ... which were used in practice and over time appeared in the resources. The result was WS4LR, an integrated and adaptable software solution, which provides for the management and manipulation of in- dividual resources, as well as their integration [6]. A web application named WS4QE ...

  • Extraction of Bilingual Terminology Using Graphs, Dictionaries and GIZA++

    Branislava Šandrih, Ranka Stanković (2020)
    U nauci, industriji i mnogim istraživačkim oblastima, terminologija se brzo razvija. Najčešće, jezik koji je „lingua franca“ za većinu ovih oblasti je engleski. Kao posledica toga, za mnoga polja termini domena su koncipirani na engleskom, a kasnije se prevode na druge jezike. U ovom radu predstavljamo pristup za automatsko izdvajanje dvojezične terminologije za englesko-srpski jezički par koji se oslanja na usaglašeni dvojezični korpus domena, ekstraktor terminologije za ciljni jezik i alat za usklađivanje delova. Ispitujemo performanse metode na domenu ...
    ekstrakcija terminologije, validacija terminologije, GIZA++, grafovi, Unitex, klasifikacija teksta
    ... English, since it is better de- veloped for many scientific and technological domains. Purely manual pro- duction of terminological resources is not the solution due to rapid changes both in research fields and corresponding terminology. Multi-Word Expressions (MWEs) are lexical units composed of more than ...
    ... ng2). An example would be: "grf04b;plu;ciljeva pronalaženja informacija;cilj pronalaženja informacija;" (goal of finding information). A Software solution for multi-word units extraction displayed in Figure 2 offers possibilities for general NLP processing on selected corpus (apply- ing lexical resources ...
    ... sists of the following steps: 8 MULTEX-East English lexicon 126 Infotheca Vol. 19, No. 2, December 2019 Scientific paper Figure 2. Software solution for MWT extraction i Aligning bilingual chunks (possible translation equivalents) from the aligned corpus. We will denote aligned chunks by S(align ...

  • 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

  • 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)
    ... n of these metallo-drugs with enzymes involved in phospholipid metabolism. Although metal complexes are efficient anti- proliferative agents in solid tumors, there are numerous side effects of these drugs such as nephrotoxicity and tumor cell resistance that must be overcome by synthesis of new ...
    ... sample plate and dried immediately under a warm stream of air. For monitoring the changes in mass spectra in the m/z range 10 000–15 000, fresh solution of 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, ...
    ... the sample plate and dried immediately under a warm stream of air. For monitoring the changes in mass spectra in the m/z range 10000-15000, fresh solution 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 ...

  • Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic

    Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)
    Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...
    mehaničke metode, proizvodnja nafte, fazi logika, donošenje odluka, optimizacija
    ... increase corrosion, the number of artificial methods that can be used decreases in the production fluid. Parameter C2 represents solid particles. With the rise of solid particles in the production fluid, the number of artificial methods that can be used is reduced. Parameter C3 represents GOR. With ...
    ... overlap with some of the artificial lift methods represents the best solution for a new well. Figure 4. Hierarchical structure of fuzzy composition. Energies 2020, 13, 1758 9 of 15 The goal of this synthesis is to give a solution of optimization model. For example, if A1 is medium, A2 is high, ...
    ... temperature, (B4) fluid density, (B5) viscosity, and (B6) well deviation; • Production operating problem parameters (C), which are: (C1) corrosion, (C2) solid particles, (C3) gas oil ratio—GOR, (C4) paraffin, and (C5) water cut. Figure 1 shows the conceptual model of an expert system for optimized selection ...