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Упит dcterms_subject_txt:tunnel construction

260 items

  • The oil industry and climate changes

    Dejan Radivojević (2020)
    Uprkos tome što je problem klimatskih promena poznat dugi niz godina i dalje veliki broj ljudi poistovećuje pojam vremenskih prilika sa klimom ne uzimajući u obzir različitu dužinu njihovog trajanja. U medijima se vrlo često mogu naći katastrofična predviđanja vezana za zagrevanje naše planete usled neodgovornog ponašanja čoveka. Sa druge strane geolozi znaju da je tokom geološke prošlosti naše planete bilo mnogo toplijih intervala od današnjih kao i da ti intervali nisu neminovno rezultovali masovnim izumiranjem živog sveta već su ...
    vremenske prilike, klima, naftne kompanije, strategije, Srbija
    ... Company that adopted its business strategy to sustainable development by reconstructing of Pančevo Refinery and starting two energy projects - the construction of the combined gas-steam power plant Pančevo and the Plandište wind farm. Key words: weather conditions, climate, oil companies, strategies ...

  • Analiza primene višekriterijumskih metoda u optimizaciji izbora hidruličnih bagera na površinskim kopovima uglja

    Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Filip Miletić, Ivan Janković (2019)
    Hidraulični bageri primenjuju se u različitim oblastima privrede a najzastupljeniji su u građevinarstvu i rudarstvu. Na površinskim kopovima sa kontinualnim sistemima, klasifikuju kao pomoćna mehanizacija a na površinskim kopovima sa diskontinualnim sistemima, kao osnovna mehanizacija. Kako je u oba slučaja njihova primena neizostavna, važno je izvršiti adekvatnu analizu postojećih podataka, u cilju optimizacije izbora tipa hidrauličnog bagera u odnosu na uslove rada datog površinskog kopa. U radu su opisane različite višekriterijumske metode koje su korišćene za analizu hidrauličnih bagera. ...
    višekriterijumske metode, površinski kop uglja, pomoćna mehanizacija, hidraulični bager
    ... THE SELECTION OF HYDRAULIC EXCAVATORS ON OPEN-CAST COAL MINING Hydraulic excavators are used in different areas of industry, most often in construction and mining. On open-cast coal mines with continuous systems, they are classified as auxiliary machinery, while on open- cast coal mines with ...

  • Increasing the Local Road Network Resilience from Natural Hazards in Municipalities in Serbia

    Biljana Abolmasov, Miloš Marjanović, Ranka Stanković, Uroš Đurić, Nikola Vulović (2024)
    lokalni putevi, prirodni hazardi, otpornost na klimatske promene, MaPLoRds

  • Application of VIКOR method in the selection of an optimal splution of excavation “Borska Reka” ore deposit

    Sanja Bajić, Dragoljub Bajić, Branko Glušćević, Radmila Gaćina (2023)

  • Properties of fly ash and slag from the power plants

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    This paper describes the physical, chemical and mineral properties of ash and slag, which were taken from thermal power plants Nikola Tesla A, Nikola Tesla B, Kostolac A and Kostolac B. The knowledge of the mineralogical material composition is important because the type of minerals directly determines the properties of the fly ash and slag and their possible application. Laboratory tests showed that ash and slag samples consist of the following minerals: amorphous materials, quartz, feldspar, mullite, melilite, cristobalite, ...
    fly ash, slag, physical composition, chemical composition, mineral composition, X-ray diffraction method
    ... the negative environmental indicators caused by fly ash and slag can be eliminated or reduced if they are used as build- ing material for road construction and other trafficked areas. The using of fly ash and slag as secondary materials for road construc- tions, saves huge amounts of standard building ...
    ... Es- tablished correlations are indicators for defining the origin, pro- perties, as well as the possibility of fly ash and slag application as a construction substitute thus preservinglimited reserves of natural building materials. 2. STUDY AREA PPNT A is the most important producer of electricity ...

  • A Twitter Corpus and Lexicon for Abusive Speech Detection in Serbian

    Danka Jokić, Ranka Stanković, Cvetana Krstev, Branislava Šandrih (2021)
    Uvredljivi govor na društvenim medijima, uključujući psovke, pogrdni govor i govor mržnje, dostigao je nivo pandemije. Sistem koji bi bio u stanju da detektuje takve tekstove mogao bi da pomogne da internet i društveni mediji postanu bolji virtuelni prostor sa više poštovanja. Istraživanja i komercijalna primena u ovoj oblasti do sada su bili fokusirani uglavnom na engleski jezik. Ovaj rad predstavlja rad na izgradnji AbCoSER-a, prvog korpusa uvredljivog govora na srpskom jeziku. Korpus se sastoji od 6.436 ručno označenih ...
    uvredljivi jezik, govor mržnje, srpski, tviter, leksikon, korpus
    ... to those using vulgar, hate speech, derogatory language, etc. In this paper, we explain the process of data acquisition, annotation, and corpus construction. We also discuss the results of an initial analysis of the annotation quality. Finally, we present an abusive speech lexicon structure and its ...
    ... the first corpus of abusive language in Serbian which consists of tweets. We explained the process of data acquisition, annotation, and corpus construction. All tweets were annotated by two independent annotators, but as explained in Section 3.2, the inter-annotator agreement was moderate. Possible ...

  • Towards Sustainable Management of Transboundary Hungarian-Serbian Aquifer

    Zoran Stevanović, Peter Kozák, Milojko Lazić, Janos Szanyi, Dušan Polomčić, Balazs Kovács, Jozsef Török, Saša Milanović, Bojan Hajdin, Petar Papić (2011)
    ... some reach 250m or even more (600m in Szeged). The well capacity ranges from 5 to 251s i, depending on geology, applied drilling techniclues, construction materials, well development and other factors 17]. In the past, many wel1s were over-pumped and forced beyond their optimal capacities, which ...

  • Дефинисање геотехничких параметара еолских седимената земуснког платоа на основу лабораторијских и теренских SPT испитивања

    Ђорђе Крзман (2024)
    Циљ овог рада је био да се одреде геотехничке караткеристике предметног терена што представља полазну основу за рационално пројектовање и градњу. Истражним бушењем утврђено је да предметни терен изграђују четри лесна хоризонта и три слоја погребене земље до дубине од 22-23 m. Лабораторијским испитивањем добијени су ефективни параметри смичуће чврстоће, где се кохезија најчешће креће између c’=14 и 18 kPa, а угао унутрашњег трења f'= 25 - 30 °. Теренска SPT испитивањем уз коришћење прихваћених корелација у геотехничкој пракси ...
    лес, лабораторија, SPT, корелације, параметри
    ... rpal)eBuHckor ulyra. ii . |ARTIFICIAL DEPOSITS: Heterogeneous material, basically siy clay and sitt with varying proportions of- small to large construction debris. Teonouuxa rpanua a a Tpancrpechaa - iransgressive TE XH OF EH A AR TI FI CI AL ZOyanjanno Nacnaro oie [ARYBYIJATHE HACTATE (patua ...
    ... kpynHor rpaf}eBMHCKor ulyTa. ARTIFICIAL DEPOSITS: Heterogeneous material, basically silty clay and silt with varying proportions of smalil to large construction debris. AJTyBVJAJIHE HACITAT E (oauuja noBonk>a): frnnaHa (CL/CI), wano no cpenbe nnacTMuHa, nako npo6usBa, cpene no jaue cTruMuirbMiBa, cpenMbe ...
    ... xpynuor rpa)eauHckor uyra. |ARTIFICIAL DEPOSITS: Heterogeneous material, basically siy clay and sitt with varying proportions of- small to large construction debris. [ARYBVIJATHE HACTATE (patua nononea) Trv (CLICI) irano o Cponree TinacTiuHa, FaKo. | npoGuna, cpenoe no jaue crvuunsana, cpene 3Gujewa ...

  • Petrološke karakteristike dunavskog šljunka (Beograd – Zemun)

    Miloš Mihajlović (2024)
    Dunavski šljunak u okolini Zemuna karakterističan je za obalne rečne naslage formirane dugotrajnim procesima erozije i transporta materijala koje reka Dunav nosi sa različitih područja uzvodno. Ispitivanja šljunka sa lokacije „Gemax” su pokazala je šljunak uglavnom zaobljen, najčešće u rasponu od nekoliko milimetara do nekoliko centimetara u prečniku. Kako Dunav nosi materijal sa velikog sliva, ovaj šljunak sadrži raznovrsne sastojke sa dominacijom kvarca i odlomaka stena visokosilicijskog sastava. Mineraloško-petrografska ispitivanja pokazala su prisustvo klasta različitog sastava, čime je potvrđena ...
    Dunav, šljunak, mineraloško-petrografska ispitivanja, građevinarstvo
    ... ographic studies have revealed the presence of clasts with different compositions, confirming its heterogeneity. This gravel is often used in construction, as a decorative material in landscaping yards and parks, as well as in aquaristics due to its neutral chemical nature. The Danube gravel in ...
    ... Zemun area is particularly valued for its aesthetic and functional qualities. Keywords: Danube, gravel, mineralogical-petrographic studies, construction SADRŽAJ BOA 9/0) b AAAAAA 1 2.2. Pregled ranijih istraživanja ............ ..4 2.3. Geologija šireg područja Beograda ..............aa ...

  • INVENTS: A Hybrid Mine Ventilation Planning and Design System

    Lilić Nikola, Stanković Ranka, Obradović Ivan (2013)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    hybrid systems, mine ventilation, expert systems
    ... a basic or initial network and an appropriate database related to this network. The ventilation design process has to continue throughout the construction of the mine ventilation system as well as its maintenance, in order to secure the highest possible level of system use and effectiveness. The ...

  • EUROLAN 2021: Introduction to Linked Data for Linguistics Online Training School

    Milan Dojchinovski, Julia Bosque Gil, Jorge Gracia, Ranka Stanković (2021)
    Prva škola za obuku polaznika koju je organizovala COST akcija NexusLinguarum održana je od 8. do 12. februara 2021. godine sa ciljem da studenti, istraživači i stručnjaci nauče osnove lingvističke nauke o podacima. Tokom obuke polaznici su se upoznali sa širokim spektrom tema: od semantičkog veba, RDF -a i ontologija, do modeliranja i pretraživanja jezičkih podataka pomoću najsavremenijih ontoloških modela i alata. Škola je održana u okviru serije letnjih škola EUROLAN-a i organizovalo ju je virtuelno (onlajn) nekoliko instituta; ...
    nauka o lingvističkim podacima, povezani podaci u lingvistici, jezički podaci, EUROLAN, NexusLinguarum, COST akcija, škola za obuku
    ... was launched at the end of October 2019. The goal of the NexusLinguarum action is to promote the study of linguis- tic data science, for which the construction of an ecosystem of multilingual 1. NexusLinguarum Infotheca Vol. 21, No. 1, September 2021 113 Dojchinovski M. et al., eurolan 2021: . . . ...

  • INVENTS: a hybrid system for subsurface ventilation analysis

    Nikola Lilić, Ranka Stanković, Ivan Obradović (2000)
    Ventilation system analysis is a complex process based on the calculation and analysis of numerous parameters. These problems can be successfully solved by the SimVent numerical package, but a full understanding and use of the obtained results require the involvement of an experienced specialist in the ventilation field. The solution was found in the creation of a hybrid system INVENTS, whose knowledge base represents a formalization of the expert knowledge in the mine ventilation field. In this paper we ...
    ... a basic or initial network and an appropriate database related to this network. The ventilation design process has to continue throughout the construction of the mine ventilation system as well as its maintenance, in order to secure the highest possible level of system use and effectiveness. The ...

  • Design of a sucker rod pumping system

    Ana Ponoćko (2024)
    For a long time in the history of oil production, sucker rod pumps have been the first and in many cases the only choice when it comes to mechanical extraction methods. Proper selection of each individual element of the system enables optimization, which entails benefits in the form of increased efficiency and reduced costs. The first part of the paper presents the underground and surface equipment of the rod pump and describes the operation of the entire system. The ...
    sucker rod pump, fluid production, mechanical extraction methods,, Prosper, QROD, RODSTAR
    ... deviation of the ball's shape from ideal sphericity must not exceed 1 to 4 nm. [3,11] Figure 3.2. Standing Valve Construction [3] 14 Figure 3.3. Traveling Valve Construction [3] The lifespan of the standing valve depends on the fluid pumping conditions. In any case, pumping fluid with a ...
    ... 001 in) for balls smaller than 50 mm in diameter, and 0.050 mm (0.002 in) for balls that are 50 mm or larger. [15] SEAL Figure 3.4. Ball construction [3] 16 3.1.4 Types of Sucker Rod Pump There are 2 basic types of pumps: • Insert Pumps • Tubing Pumps Tubing Pumps The design of ...

  • An Integrated Environment for Management and Exploitation of Linguistic Resources

    Ranka Stanković, Ivan Obradović (2009)
    ... Serbian remained at a slow pace. Thus a procedure for automatic (or semiautomatic) construction of this type of dictionary on basis of a simple list of compounds was added. The procedure for automatic construction of entries for a DELAC dictionary is based on a set of rules [10]. The rule ...

  • 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)
    ... of 15 in addition to the seismic ones, those of air blast waves, fly rock, etc. Thus, production efficiency is increased and, at the same time, construction and mining facilities, as well as the environment in the vicinity of the blast site, are protected. 2. Soil Oscillation Law To establish the ...
    ... 182. Energies 2016, 9, 617 15 of 15 10. Vukadinović, S. Elementsof Probability and Mathematical Statistics; Technique for Copying Bureau of Construction: Belgrade, Serbia, 1970; pp. 329–331. 11. Trajković, S.; Tokalić, R.; Lutovac, S. Study of Seismic Impacts on Adjacent Building due to Blasting ...

  • Arhitektonsko-građevinski kamen Crne Gore, stanje i potencijali

    Darko Božović, Vladimir Simić (2023)
    arhitektonsko-građevinski kamen, rezerve, kvalitet, potencijalnost

  • An Approach to Management Decision Support: The Coal Mine Pljevlja Management Information System

    Božo Kolonja, Ranka Stanković, Filip Vuković, Ivan Obradović (2006)
    In this paper we describe the approach that has been used in the development of the Management Information System (MIS) in the Coal Mine Pljevlja in Montenegro. The methodology of this approach was based on new information technologies and management techniques which have already been successfully applied in other related fields. Its main goal was to introduce modern management techniques to mining, adapted to specific features of the mining industry, its operations and environment, thus enabling the tactical management ...
    ... plan, carry out and monitor the realization of tactical and strategic goals. Figure 1 shows the architecture of TIS as a starting point for the construction of an e-mine. This figure shows two open pits, but if new sites and production complexes are opened, they can also be included in the system ...

  • Analysis of a simplified model for determining rock mass oscillation velocity at the Kovilovača open pit

    Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac (2023)
    ... energy transformes into elastic deformations. Seismic waves, that propagates through the rock mass, produces soil oscillation and oscillation of construction objects [1-3]. Parameter for estimating of the seismic action of blasting, that is commonly used, represents the rock mass oscillation velocity ...

  • Production of morphological dictionaries of multi-word units using a multipurpose tool

    Ranka Stanković, Ivan Obradović, Cvetana Krstev, Duško Vitas (2011)
    The development of a comprehensive morphological dictionary of multi-word units for Serbian is a very demanding task, due to the complexity of Serbian morphology. Manual production of such a dictionary proved to be extremely time-consuming. In this paper we present a procedure that automatically produces dictionary lemmas for a given list of multi-word units. To accomplish this task the procedure relies on data in e-dictionaries of Serbian simple words, which are already well developed. We also offer an evaluation ...
    electronic dictionary, Serbian, morphology, inflection, multi-word units, noun phrases, query expansion
    ... we identified inflectional classes associated with the same additional information. B. The rule design strategy The procedure for automatic construction of a DELAC type dictionary relies on a manually produced set of rules. The rule design strategy resulted from the aforementioned expert analysis ...
    ... Languages — RANLP09, Borovetz, Bulgaria, 2009, pp. 23–29. [12] C. Krstev, R. Stanković, I. Obradović, D. Vitas, and M. Utvić, “Auto- matic Construction of a Morphological Dictionary of Multi-Word Units,” in IceTAL. Reykavik, Iceland: Springer, August 2010, pp. 226–237. [13] I. Alegria, O. Ansa ...

  • Multi-word Expressions for Abusive Speech Detection in Serbian

    Ranka Stanković, Jelena Mitrović, Danka Jokić, Cvetana Krstev (2020)
    Ovaj rad predstavlja istraživanja na usavršavanju i unapređenju srpske verzije rečnika Hurtlex, višejezičnog leksikona uvredljivih reči. Posebnu pažnju posvećujemo dodavanju izraza sa više reči (polileksemskih jedinica) koji se mogu smatrati uvredljivim, jer su takvi leksički zapisi veoma važni za postizanje dobrih rezultata u mnoštvu zadataka otkrivanja uvredljivog jezika. Srpski morfološki rečnici se koriste kao osnova za čišćenje podataka i stvaranje rečnika. Istaknuta je veza sa drugim leksičkim i semantičkim resursima na srpskom jeziku i predviđena je izgradnja sistema za ...
    uvredljiv govor, govor mržnje, leksički izvori, višejezični leksikon, izrazi sa više reči
    ... any tools and resources for Serbian language processing, such results were expected and certainly indicate that this phase is inevitable in the construction of similar lexicons. After the removal of all the wrong entries, 1725 entries remained. After removing duplicates, 1402 entries remained with 1000 ...
    ... Serbian just zmija ‘snake’. Table 2 shows number of MWEs that were rejected (no) and confirmed (yes) per each HurtLex category. 4 MWE - dictionary construction 4.1 Selection of new abusive MWE entris In order to find a set of words that can be triggers for MWEs and generally for offensive speech, a set ...