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Упит dcterms_subject_txt:Tehno,ekonomski model

824 items

  • Bezbednosna rastojanja u jamskim magacinima eksploziva u domaćoj i međunarodnoj praksi

    Luka Crnogorac, Ognjen Popović, Toma Jovičić, Veljko Lapčević (2024)
    Projektovanje jamskih magacina eksploziva predstavlja složen inženjerski problem. Sama namena jamskih magacina zahteva ispunjenost niza uslova koji se odnose na bezbedno pozicioniranje magacina, ispunjenost uslova ventilacije, pristupa, rukovođenja magacinom, načina skladištenja eksplozivnih sredstava, protivpožarne zaštite, elektro zaštite itd. Veoma važan parametar prilikom projektovanja jamskih magacina eksplozivnih sredstava predstavlja minimalno sigurnosno rastojanje između susednih komora u kojima su smeštena eksplozivna sredstva u cilju sprečavanja potencijalnog neželjenog dejstva vazdušnog udarnog talasa, razornog dejstva eksplozije i seizmičkog dejstva eksplozije. U ovom radu su prikazani ...
    jamski magacini, eksplozivi, bezbednosna rastojanja
    ... Univerzitet u Beogradu, Rudarsko-geološki fakultet, Beograd, ISBN 86-7352-114-9 [2] United Nations (2023) UN Model Regulations: UN Recommedations on the Transport of Dangerous Goods - Model Regulations Twenty-third revised version, United Nations Publications, New York and Geneva, e-ISBN 2412-0820 ...
    ... površinskom eksploatacijom. Kako potražnja za mineralnim sirovinama konstantno raste tako raste i potreba za korišćenjem eksploziva koji predstavljaju ekonomski prihvatljivu opciju za masovno razaranje stenske mase. Eksplozivi predstavljaju opasne materije i na osnovu stepena opasnosti, hemijskih osobina ...

  • Минерагенија зеолитских туфова Србије

    Vladan Kašić (2018-02-05)
    Лежишта наших зеолитских туфова (Златокоп, Игрош, Јабланица 1, Беочин, Топоница и Сланци) која су овде била предмет детаљних истраживања, просторно и генетски везана су за вулканске и вулканокластичне стене маринских средина сенонске и неогенске старости и језерске седименте неогене старости и настала су као продукт девитрификације вулканског стакла.Током лабораторијских испитивања при изради ове докторске дисертације, примењене су следеће аналитичке методе: оптичка испитивања петрографских препарата; рендгенска дифракција праха (XRD); скенирајућа електронска микроскопија (СЕМ метода); хемијска карактеризација зеолитских туфова у оквиру ...
    минерагенија, зеолитски туф, Србија, клиноптилолит, хојландит
    ... Belgrade, 2017 Ментор: Др Драгана Животић, ванредни професор, економска геологија. Универзитет у Београду, Рударско-геолошки факултет, Београд Чланови комисије: Др Владимир Симић, редовни професор, економска геологија. Универзитет у Београду, Рударско-геолошки факултет Београд ...
    ... немају економски значај. Она се образују у доњим хоризонтима коре распадања алкалних стена. Ретко, зеолити се могу појављивати и као остаци распадања у карстним шупљинама, приликом излуживања карбонатних стена (Михајлов и Кринари, 1970). 4. Седиментна лежишта зеолита представљају економски најзначајнији ...
    ... 4.3. Прелиминарни генетски модел лежишта зеолитских туфова у терцијарним басенима Србије На основну претходних разматрања, може се успоставити прелиминарни модел образовања лежишта зеолита у терцијарним басенима Србије, кроз обраду свих елемената генетског модела (према Јанковићу, 1981), и то: ...

  • Српски језик у дигиталном добу -- The Serbian Language in the Digital Age

    Duško Vitas, Ljubomir Popović, Cvetana Krstev, Ivan Obradović, Gordana Pavlović-Lažetić, Mladen Stanojević (2012)
    Serbian language
    ... друштвене и економске промене уСрији и отва- рање према свету, али и за усклађивање законо- давства, стандарда и терминологије са законодав- ством, стандардима и терминологијом који важе у Европској унији. Посено се уочава утицај ен- глеског језика, и то не само зог културолошких и економских момената ...
    ... што су новине, радио, телевизија, књиге и други олици, задово- љене су различите потрее за комуникацијом. У последњих двадесет година информационе техно- логије помогле су да се аутоматизују и поједноставе ројни процеси: ‚ софтвер за стоно издаваштво је заменио писаћу машину и слагање текста; ‚ Microsoft ...
    ... последње пре- преке својом подршком слоодном и отвореном ко- ришћењу појединачних језика. Ако гледамо и ко- рак даље, иновативне европске вишејезичне техно- логије представљаће узор за наше партнере по свету када они уду почели да оезеђују ове технологије за своје вишејезичне заједнице. Језичке технологије ...

  • 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
    ... Zemlja-jonosfera, a koje nastaju kao posledica atmosferskog pražnjenja korišćen je model niske jonosfere u noćnim uslovima, koji je sastavni deo modela propagacije dugih talasa LWPM (Long Wave Propagation Model), koji sadrži ulazne podatke za programski paket LWPC. Postupak korišćenja ovog programa ...
    ... simulirane su promene vrednosti amplitude i faze signala u uslovima izmenjene koncentracije elektrona. Programski paket LWPC polazi od modela niske jonosfere i modela prostiranja VLF talasa na određenim GCP od predajnika do prijemnika. Osnovni parametri sredine propagacije, oštrina gornje granice ...
    ... vrednost 7107 m-3, dok je disipirana energija procenjena na 6 GJ. Dobijeni rezultati su u saglasnosti sa rezultatima proračuna na osnovu drugih modela niske jonosfere, kao i sa rezultatima merenja primenom različitih tehnika, sa tla i “in situ”. Ključne reči: Prostiranje talasa vrlo niskih ...

  • A Multilingual Evaluation Dataset for Monolingual Word Sense Alignment

    Sina Ahmadi, John P McCrae, Sanni Nimb, Fahad Khan, Monica Monachini, Bolette S Pedersen, Thierry Declerck, Tanja Wissik, Andrea Bellandi, Irene Pisani, [...] Ranka Stanković and others (2020)
    Aligning senses across resources and languages is a challenging task with beneficial applications in the field of natural language processing and electronic lexicography. In this paper, we describe our efforts in manually aligning monolingual dictionaries. The alignment is carried out at sense-level for various resources in 15 languages. Moreover, senses are annotated with possible semantic relationships such as broadness, narrowness, relatedness, and equivalence. In comparison to previous datasets for this task, this dataset covers a wide range of languages ...
    lexical semantic resources, sense alignment, lexicography, language resource
    ... they are considered to agree that the link be- tween this is none. Table 4 presents the IAA in a 5-class model, that is the five semantic relationships. Moreover, we provide a 2-class model where all types of semantic re- lationships, namely exact, broader, narrower and related, are merged and compared ...
    ... contemporânea. Lisboa: Academia das Ciências de Lis- boa e Editorial Verbo, 2. Cimiano, P., McCrae, J. P., and Buitelaar, P. (2016). Lexi- con Model for Ontologies: Community Report. Dahlerup, V. (1918). Ordbog over det danske sprog, vol- ume 1. Gyldendal. Dandala, B., Mihalcea, R., and Bunescu ...
    ... wordnet (bultreebank bulgarian wordnet). In John P. McCrae, et al., editors, Proceed- ings of the LDK 2017 Workshops: 1st Workshop on the OntoLex Model (OntoLex-2017), Shared Task on Trans- lation Inference Across Dictionaries & Challenges for Wordnets co-located with 1st Conference on Language, ...

  • 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
    ... (Stanković et al., 2018). 3.2 Semantic networks The Serbian wordnet (SWN) has been developed in the scope of the Balkanet project following the model adopted for the EuroWordnet project (Krstev et al., 2004). More than 22,000 synsets built by app. 28,000 literals are Princeton WordNet (PWN), except ...
    ... No. 2, December 2019 107 Stanković R. and Utvić M., “Vebran Web Service . . . ”, pp. 99–118 MVC.Net web application framework which uses the model–view–controller pattern. Clients are open source software (OCWB/CQPweb and NoSketch Engine / Bonito have been implemented in PHP and Python respectively) ...
    ... 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, Matematički fakultet, Beograd, 2009 Stanković, Ranka, Cvetana Krstev ...

  • A business intelligence approach to mine safety management

    Ljiljana Kolonja, Ranka Stanković, Ivan Obradović, Olivera Kitanović, Dejan Stevanović, Marija Radojičić (2016)
    ... years, as well as that the number of light injuries was much greater than the number of severe ones. 3.3. BI development environment The BI model for mine safety integrates standard OLAP techniques based on RudOnto, where dimensions of OLAP cubes are concepts of RudOnto ontology, and its hierarchy ...
    ... number of injuries can be defined in a quick and simple manner. 13th ISCSM 2016 BELGRADE 6 (a) (b) Figure 3. OLAP cubes The BI model can offer important information for safety management but also allows different ways of presenting data. Figure 4 depicts two ways of presenting data ...

  • Crystal structure of K3EuSi2O7

    Sabina Kovač, Predrag Dabić, Aleksandar Kremenović (2021)
    alkalni silikati elemenata retkih zemalja, kristalna struktura, sinteza metodom fluksa, rendgenska difrakcija na monokristalu
    ... it is isostructural with K3ErSi2O7,15 atomic coordinates of this structural analogue were used as a starting model for structure refinement. When Er3+ was replaced with Eu3+ the model converged rapidly, and the crystal structure was refined to R = 3.5 %. The structure was refined on F2 by full-matrix ...

  • Primjena magnetometrijskih ispitivanja na arheološkom lokalitetu Nedeljkova humka

    Mirko Petković, Vesna Cvetkov, Milorad Ignjatović, Dejan Naumov (2020)
    ... e a s t E u ro p e Magnetometrijska je istraživa- nja obavljeno protonskim magnetome- trom-gradiometrom sa Overhauzerovim efektom (GEM System model GSM- 19GW) u “hodajućem”modu. S obzirom na to da je ispitivani prostor oranica, sa veoma mladom po- ljoprivrednom kulturom, donja sonda je p ...

  • 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
    ... example sentences, collocations) as complementary resources in electronic dictionaries is known as the one-click dictionary or push-pull dictionary model, which is used, for example, in the Sketch-engine [9] for several languages, but has not yet been used for Serbian. A similar approach to the one outlined ...
    ... export of lexical database data in RDF that is compliant with the The OntoLex Lemon Lexicography Module [47], lexicog [48], as an extension of Lexicon Model for Ontologies (lemon) [49,50]. This is also in line with activities within NexusLinguarum COST action [51], which promotes synergies across Europe ...
    ... area of linguistic data science. An example of RDF export is presented in Figure 4 followed by the Turtle RDF Syntax [52] to illustrate the use of the model. Appl. Sci. 2021, 11, 2892 13 of 22 Figure 4. The graph for the translation of lexical entries: ‘fossil fuel’-‘fosilno gorivo’). :fossil_fuel a ...

  • Pre-failure deformation monitoring as rockfall prediction tool

    Miloš Marjanović, Biljana Abolmasov, Zoran Berisavljević, Marko Pejić, Petko Vranić (2021)
    General Engineering
    ... Acquisition technique primarily involves direct time of flight (DTOF) TLS scanner Leica Scan Station P20. With the latest firmware upgrade, this model remains one of the most reliable and efficient scanners collecting million points per second and range of up to 100-120 m in optimal conditions. The ...
    ... Z) in respect to the optical center of the instrument (0,0,0), with an accuracy of а few millimeters. In result, it generates a discrete surface model consisting of millions of points called point clouds, referenced to a relative Euclidean coordinate system originating from the optical center of ...

  • Хазард од клизишта у Србији у 21. веку

    Biljana Abolmasov (2019)
    клизишта, хазард од клизишта, промене климе
    ... [29] Rajkovi� B., Vujadinovi� M. and Vukovi� A. (2013). Report on rev change scenarios including review on applied statistical method f systematic model errors, with maps of temperature, precipitation and r indices changes; Second national communication of the Republic of S the United Nations framework ...
    ... 08. [29] Rajkovi B., Vujadinovi M. and Vukovi A. (2013). Report on rev change scenarios including review on applied statistical method systematic model errors, with maps of temperature, precipitation anc indices changes; Second national communication of the Republic of the United Nations framework ...

  • Adaptive neuro-fuzzy prediction of operation of the bucket wheel drive based on wear of cutting elements

    Filip Miletić, Predrag D. Jovančić, Milos Milovančević, Dragan Ignjatović (2020)
    The capacity of the rotor excavator depends largely on the operation of the subsystem for digging. There is a great contribution to the correct and sharp teeth when the capacity is the highest. In the function of time, the teeth become clogged due to abrasive wear, or changes in their geometric shape. To analyze the bucket wheel drive in depend on wear of the cutting elements in this study adaptive neuro fuzzy inference system (ANFIS) approach was implemented. ANFIS ...
    Pogon rotornog točka, habanje, rezni elementi, ANFIS

  • 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

  • Molecular and Isotope Composition of Biomarkers in Immature Oil Shale and its Liquid Pyrolysis Products (Open and Closed System)

    Gordana Gajica, Aleksandra Šajnovic, Jan Schwarzbauer, Aleksandar Kostić, Branimir Jovančićević, Ksenija Stojanović (2021)
    The molecular and isotopic composition of biomarkers in initial bitumen isolated from raw immature oil shale samples from the Lower Miocene Aleksinac Basin (Serbia) and liquid products (LPs) obtained by pyrolysis in open (OS) and closed systems (CS) are studied. The influence of pyrolysis type and variations of kerogen type on biomarkers composition and their isotopic signatures in LPs is determined. The molecular composition of the LPs from the OS pyrolysis is very similar to those in initial bitumen, independently ...
    ... mixed type I/II kerogen, deposited in brackish environment; Gajica et al., 2017). Pyrolytic experiments were performed in open (OS, Pyrolyser, Model MTF 10/15/130 Carbolite, UK) and closed (CS, autoclave) systems at a temperature of 400 °C for 4 h. The biomarker signatures were evaluated using ...

  • Hidrogeološke karakteristike područja Cerničkog polja (Istočna Hercegovina) sa posebnim osvrtom na rizik od zagađena podzemnih vodnih resursa

    Petar Vojnović (2023)
    ... Va-1. Filip Arnaut, Vesna Cvetkov, Dragana Đurić: Prognoziranje iznadprosečnih vrednosti kvaliteta vazduha u Novom Sadu korišćenjem Random Forest modela Va-2. Radmila Lišanin, Čedo Lalović: Modelovanje atmosferske disperzije mikropolutanata Sekcija: Sediment (S) S-1. Miloš Dubovina, Dejan Krčmar ...

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

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... wind speed. The results from the Max Planck Institute for Meteorology Global Climate Model (ECHAM), the Hadley Center Coupled Model (HadCM), and the National Center for Atmospheric Research Parallel Climate Model (NCAR-PCM) under AIB and A2 IPCC SRES scenarios were statistically downscaled with ...
    ... authors use the agroclimatic model to calculate agroclimatic indices and the dynamic crop model as a mathematical tool to calculate the growth and development rate as a response to climate changes. More specifically, the authors adopt the Trnka et al. (2009) Agriclim model to determine the agroclimatic ...
    ... agroclimatic indices, as well as the DSSAT crop model to calculate the growth rate and phase duration from sowing to anthesis and from sowing to maturity (Tsuji et al., 1998). The DSSAT model was revealed to be an adequate crop model, since it operates with daily data and allows the detection of changes ...

  • 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
    ... et al., 2007) to perform tokenisation, truecasing and cleaning. In the next step a 3-gram translation model was built us- ing KenLM (Heafield, 2011), followed by the training of this translation model. For the purpose of word-alignment, phrase extraction, phrase scoring and creation of lexicalised reordering ...
    ... 26th International Conference on Computational Linguistics: Technical Papers, 3401–3411, 2016. Heafield, Kenneth. “KenLM: Faster and Smaller Language Model Queries”. In Proceedings of the 6th Workshop on Statistical Machine Translation, 187–197. Association for Computational Linguistics, 2011. Hewavitharana ...

  • The influence of Al<sup>3+</sup>ion on porcine pepsin activity<i>in vitro</i>

    Vesna M. Pavelkić, Kristina R. Gopcević, Danijela Z. Krstić, Marija A. Ilić (2008)
    The in vitro effect of Al3þ ions in the concentration range 1.7·1026M–8.7·1023M on pepsin activity at pH 2, via kinetic parameters and its electrophoretic mobility was evaluated. Kinetic study demonstrated the existence of an activation effect of Al3þ at pH 2 on pepsin molecule. Kinetic analysis with respect to concentrations of haemoglobin showed that Al3þ ions increase the maximal velocity (Vmax) and kcat values rather than apparent affinity for substrate (KS) implying the non-competitive nature of activation which indicated ...
    Пепсин, алуминијум, кинетика, активација, електрофоретска мобилност
    ... protease, is the principal proteolytic enzyme of gastric juice and as the best understood of 215 N -_ this family of proteinases it was used as a model to Asp located at· the centre of the b{ndmg cleft study related enzymes. As all aspartic proteinases between the domains. One of two Asp residues has ...
    ... admittance is pepsin has been well structurally characterized, it restricted by a hinged flexible flap region [1-6]. The represents an appropriate model to study the effects of pepsin consists of 326 residues with molecular weight — metal ions on structure, function and kinetic of 35000Da and it ...
    ... UV-VIS spectrophotometer with an electro-thermaltemperature control cell unit. The temperature control performed with DANA - Digital voltmeter model 4800 with chromel-alumel thermocouples. A quartz cell with a 1 cm path length was used for all the absorbance studies. All measurements were carried ...

  • Strategic Environmental Assessment in the Application of Preventive Protection for Wind Farm Noise—Case Study: Maestrale Ring Wind Farm

    Boško D. Josimović, Aleksandar Cvjetić, Božidar Manić (2021)
    Determining the spatial position of wind turbines is the initial and most important phase in the development of a wind farm project. In this sensitive phase, all potential problems that may arise in the later stages of project development should be prevented by means of spatial and urban planning instruments. This makes it possible to achieve maximum use of the potential of wind in a particular space and, thus, fulfil the technical and economic requirements of the project while ...
    Energija,energetski inženjering i elektroenergetska tehnologija,obnovljivi izvori energije, održivost i životna sredina,električni i elektronski inženjering,kontrola i optimizacija,inženjering
    ... as wide a range of wind turbines as possible, the types of wind turbines with the most unfavorable scenario were analyzed for the mathematical model, i.e., the types of wind turbine that had the largest dimensions at that time—with the height of the turbine center at 149 m and the rotor diameter ...
    ... wind farm was carried out in the program SoundPlan v.8.1, based on: 1. Sound emissions from the selected type of wind turbine; 2. A 3D digital model of the planning area; 3. The international standard ISO 9613 [59], with input settings and settings specially adapted to the assessment of noise ...
    ... and qualitative criteria (semi-quantitative method) and a partial noise impact assessment was carried out based on the results from the software model used and then incorporated into a matrix representation of multicrite- ria evaluation in SEA. This approach results in determining the ranks of the ...