Претрага

Упит dcterms_subject_txt:ratio of modified secondary and primary compression index

2950 items

  • Управљање радом центрифугалних компресора

    Младен Благојевић (2024)
    Овај мастер рад се бави анализом и управљањем рада центрифугалних компресора у индустријским постројењима, са посебним освртом на управљачке системе који осигуравају њихов ефикасан рад. Рад обухвата разматрање различитих система за регулацију протока, притиска и примену савремених метода регулације као што су повратна и напредна. Такође, анализиране су динамичке промене у раду компресора, утицај поремећајних величина и могућности оптимизације. Резултати су показали да правилна примена управљачких система не само да спречава пумпање, већ и повећава стабилност и продуктивност целокупног ...
    центрифугални компресори, управљање компресорима, проток притисак, повратна регулација, напредна регулација, оптимизација
    ... BpejHoOcTH. Ejumnce Ha upTexxy OJ1TOBapajy KOHCTaHTHHM BpeJIHOCTHMa ce(biKacHOcCTH KOMIIpecopa 1 Process Control for Compression Systems, Article in Journal of Engineering for Gas Turbines and Power, August 2017. 35 140 120 Pri tis ak - % { st ep en ko mp re si je } -} o o 20 4O 6o BO ...
    ... newark.com/variable-speed-drives-improve-machine- efficiency-in-industrial-application-trc-bi . Advanced Control Technique of Centrifugal Compressor for Complex Gas Compression Processes, Kazuhiro Takeda, Kengo Hirano, Hiroshima, Japan . MBeanh · /lejaH, TypOoKoMmpecopM, Pynapcko-IeoMbomIku · (baKyJTeT ...
    ... . . AyroMaTcka peryznanuja KoMiipecopa, 3aBpmrnu paji, Kpacrajar Bakuh, 3arpeo 2015. · Process Control for Compression Systems, Article in Journal Engineering for Gas Turbines and Power, August 2017. .· Linkedin Article, URL: https://www.linkedin.com/pulse/what-does-inlet-guide- vanes-do ...

  • Classification of mining waste landfills according to legislation in Serbia

    Dragana Nišić, Uroš Pantelić, Nikoleta Aleksić, Neda Nišić (2021)
    rudarski otpad, jalovina, uredba, deponija, kategorija A, klasifikacija
    ... Knežević, and N.Lilić: Assessment of risks associated with the operation of the tailings storage facility Veliki Krivelj, Bor (Serbia), Archives of Mining Sciences, vol. 63, no. 1, 2018 [10] L. N. Bowker: Potential risk index for any tailings portfolio or facility - A tool for identifying and cla- ...
    ... visions of the Bylaw dealing with the terms of classification. It is determined that the landfill is cla- ssified based on the possibility of a potential failure and the character and composition of the waste disposed on it, while the process of classification according to the consequences of the failure ...
    ... запослених доступним у слободном приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available ...

  • Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite

    Philippe Colomban, Aleksandar Kremenović (2020)
    Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...
    asbestos, CMC, Corsica, fiber, pottery
    ... Eocene to Oligocene retrogrression and recrystallization of the Stak eclogitte in northwest Himalaya. Lithos 2015, 240. [CrossRef] Afify, A.S.; Hassan, M.; Piumetti, M.; Peter, 1.; Bonelli, B.; Tulliani, J..M. Elaboration and characterization of modified sepiolites and their humidity sensing, features ...
    ... possible to identify large amounts of antigorite and chlorite-serpentine and minor amounts of (heated) actinolite, crocidolite (riebeckite), talc and quartz in sample d (Figure 5 bottom). Talc (MgaSiaOio(OH)) results from the degradation of amphiboles and pyroxenes and belongs to the phyllosilicate ...
    ... one), antigorite and chlorite-serpentine; sample c is primarily composed of actinolite and/or tremolite (actinolite and tremolite are difficult to distinguish in complex XRPD patterns like this one); and sample d is primarily composed of actinolite and/or crocidolite (actinolite and crocidolite are ...

  • Using Lexical Resources for Irony and Sarcasm Classification

    Miljana Mladenović, Cvetana Krstev, Jelena Mitrović, Ranka Stanković (2017)
    The paper presents a language dependent model for classification of statements into ironic and non-ironic. The model uses various language resources: morphological dictionaries, sentiment lexicon, lexicon of markers and a WordNet based ontology. This approach uses various features: antonymous pairs obtained using the reasoning rules over the Serbian WordNet ontology (R), antonymous pairs in which one member has positive sentiment polarity (PPR), polarity of positive sentiment words (PSP), ordered sequence of sentiment tags (OSA), Part-of-Speech tags of words (POS) ...
    ... given in Table 3. Although irony and sarcasm have similar functions in a natural language, sarcasm classification results given in Table 3 show that language resources used for creating features have to be changed and adjusted. To this end, a modified list of stylistic and semantic markers for a sarcasm ...
    ... was: the usage of letters without diacritics (s instead of š, c instead of č or ć, z instead of ž and d or dj instead of đ ), usage of transcribed words instead of words in the BCMS languages, e.g. hepi for happy, and the repetition of some letters for emphasis, e.g. saaad instead of sad ‘now’. The tweet ...
    ... proper set of features, the precision of the ironic tweets classifier can be notably improved (Fig. 3), but in the case of sarcasm, all sets of features provide similar and low performance measures. The results of both classifiers show low grade of recall and it shows us that we should enlarge and improve ...

  • Integracija heterogenih tekstualnih resursa

    Ranka Stanković, Ivan Obradović (2007)
    U radu je opisan pristup integraciji heterogenih tekstualnih resursa za srpski jezik uz pomoć jednog kompleksnog softverskog alata, razvijenog specijalno za ove potrebe. Opisani su struktura i osnovne komponente razvijenog sistema. Iznete su i mogućnosti unapređivanja resursa međusobnom razmenom informacija, koje pruža razvijeno integrisano okruženje. Konačno, opisana je i mogućnost primene integrisanih heterogenih resursa za proširenje upita, kao i pretraživanje tekstova uopšte, a naznačeni su i neki od pravaca daljeg razvoja.
    ... Further development is aimed at implementation of new functions, but also of a web application where part of the functions of WS4LR would be accessible via the internet, and which would at the same time provide for integration of WS4LR and the corpora of Serbian that are also partially accessible ...
    ... The diversity of textual resources University of Belgrade for many years, as well a a necessity of creating an appropriate tool whi ance, usage, further development and integration. In this paper we outline the structure and main components of the system we developed under the name of WS4LR (WorkStation ...
    ... handles corpora of Serbian, multilingual aligned corpora, a system of morphological dictionaries for Serbian, the Serbian wordnet and the multilingual ontology of proper names Prolex. We describe the possibilities WS4LR offers for enhancement of these resource through mutual interchange of information ...

  • Microstructural and magnetic properties of electrospun hematite/cuprospinel composites

    Mira Ristić, Aleksandar Kremenović, Michael Reissner, Željka Petrović, Svetozar Musić (2020)
    Phase composition, microstructural and magnetic properties of electrospun hematite/cuprospinel composites were investigated. Samples were synthesized starting with 0 to 10 mol% of copper relative to iron. The round shape of reference electrospun fbres was preserved upon their heating up to 600 °C in air, whereas at 700 °C hollow substructure was additionally formed. In these reference samples the presence of hematite phase was detected by XRPD. A small amount (traces) of Fe3O4 /γ-Fe2O3 was also found, due to the ...
    Electrical and Electronic Engineering, Condensed Matter Physics, Atomic and Molecular Physics and Optics, Electronic, Optical and Magnetic Materials

  • An Italian-Serbian Sentence Aligned Parallel Literary Corpus

    Saša Moderc, Ranka Stanković, Aleksandra Tomašević, Mihailo Škorić (2023)
    This article presents the construction and relevance of an Italian-Serbian sentence-aligned parallel corpus, delving into the aligned sentences in order to facilitate effective translation between the two languages. The parallel corpus serves as a valuable resource for language experts, researchers, and language enthusiasts, fostering a deeper understanding of linguistic nuances and cultural expressions. By bridging the gap between Serbian and Italian, this corpus opens new avenues for cross-cultural communication and collaboration, and ultimately contributes to the improvement of language-related ...
    Aligned corpus, parallel corpus, Serbian, Italian, literature

  • Развој хибридног модела за оптиматизацију завршне контуре одлагалишта у површинској експлоатацији лежишта минералних сировина

    Aлександар Додеровић (2024)
    Површинска експлоатација минералних сировина захтијева претходно откопавање значајних( милионских) количина јаловине, које је неопходно транспортовати до локације на којој ће сеона трајно одложити. Традиционални приступ избора локације и дизајна одлагалишта се карактерише парцијалним приступом, заснованом на анализи неколико водећих критеријума као и на личном искуству инжењера, често занемарујући синергетски ефекат осталих утицајних фактора Технолошке операције које се односе на манипулацију јаловином, међу којима предњачи транспорт, генеришу највећи дио трошкова у површинској експлоатацији. Такође, цјелокупан процес експлоатације додатно је ограничен ...
    оптимизације завршне контуре одлагалишта, хибридни модел, површинска експлоатација, генетски алгоритам

  • Effects of external noise on threshold-induced correlations in ferromagnetic systems

    Dragutin Jovković, Sanja Janićević, Svetislav Mijatović, Lasse Laurson, Đorđe Spasojević (2021)
    Изингов модел, праг детекције, екстерни шум

  • Површинско распадање керсантита из Тешића мајдана у корелацији са начином обраде на примеру малог степеништа (Београдска тврђава)

    Невенка Новаковић (2024)
    Архитектуру Београда на прелазу 19. у 20. век обележила је употреба керсантита из каменолома Тешића мајдана. Kao камен високих декоративних својстава, керсантит је коришћен за јавне споменике, делове или потпуну изградњу објеката (Народна скупштина Србије, Мало степениште, Народни музеј и др.). Како очување споменика културе изискује познавање својстава уграђеног камена, истраживања су обухватила детаљно проучавање петролошких, хемијских и физичких карактеристика керсантита из Тешића мајданa и узорака камена из споменика Мало степениште (студија случаја). Након детаљног мапирања стања керсантита, лабораторијских ...
    керсантит, Мало степениште, споменик културе, архитектонски камен, физичко-хемијско распадање, мапирање, форме распадања, површинска обрада

  • Softverski alati za korišćenje resursa za srpski jezik

    Ivan Obradović, Ranka Stanković (2008)
    ... al-Index or ILI. This enabled the in- terconnecting of wordnets for different languages and their integration into a multilingual linguistic data base. Wordnets for Bulgarian, Greek, Roma- nian, Turkish and Serbian were developed along the same lines between 2001 and 2004 within the scope of the ...
    ... the auspices of the Faculty of Mathematics of the University of Belgrade and gathers researchers in this field from several Fac- ulties. The most important and the most devel- oped among them is the system of morphological dictionaries of Serbian (SMD). Another highly important and developed resource ...
    ... development of various types of resourc- es, during a number of years and in the frame- work of various projects, and hence within dif- ferent methodological frameworks, motivated members of the Group to initiate the development of software tools aimed at alleviating the main- tenance and further development ...

  • Palinomorfe sa lokaliteta Gostuška reka (Stara planina)

    Ivan Rutović (2024)
    U radu su prikazani rezultati palinološkog istraživanja permsko-trijaskih sedimenata sa lokaliteta Gostuška reka. Palinološki kompleksi su detaljno analizirani, što je omogućilo morfološku, taksonomsku i paleoekološku identifikaciju palinomorfi. Istraživanje je pokazalo prisustvo velikog broja spora i polena golosemenica, dok je polen skrivenosemenica zastupljen u manjem procentu. Na osnovu paleoekoloških analiza, zaključeno je da je tokom formiranja sedimenata na lokalitetu vladala aridna klima, sa povremenim vlažnim fazama koje su omogućavale razvoj močvarne vegetacije.
    palinomorfe, paleoekologija, perm - trijas, Stara planina, Gostuška reka
    ... na, N.A., 1953. Spores and pollen characteristics of the Cretaceous deposits of the central regions of the USSR. Institut Geoligiche Kikh Nauk, Trudy, no. 145, no. 61, P.p. 3-183. Brugman A. W., 1986: A palynological characterization of the upper scythian and anisian of the transdanubian central ...
    ... 1978. Aspects of Permian palaeobotany and palynology. XVII. Conifer extinction in Europe at the Permian-Triassic junction: Morphology, ultrastructure, and geographic/stratigraphic distribution of Nuskoisporites dulhuntyi (prepollen of Ortiseia, Walchiaceae). Review of Palaeobotany and Palynology ...
    ... range (Hungery) and the Vicentinian Alps (Htaly). — Unpubl. Ph. D. thesis, State Univ. Utrecht, 95 p. 34 Cassinis, G., di Stefano, P., Massari, F., Neri, C. & Venturini, C. 2000: Permian of south Europe and its interregional correlation. (In: Permian-Triassic Evolution of Tethys and Western C ...

  • 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
    ... version, instructional method, is format of, is part of, is refe- renced by, is replaced by, is required by, date issued, is version of, license, mediator, medium, date modified, provenance, references, replaces, requires, rights holder, spatial coverage, table of contents, temporal coverage, date valid ...
    ... запослених доступним у слободном приступу. - Претрага репозиторијума доступна је на www.dr.rgf.bg.ac.rs The Digital repository of The University of Belgrade Faculty of Mining and Geology archives faculty publications available in open access, as well as the employees' publications. - The Repository is available ...
    ... Obradović. “The Usage of Various Lexical Resources and Tools to Improve the Performance of Web Search Engines”. In LREC, Paris, France: European Language Resources Association (ELRA), 219–224, 2008. http://lrec-conf.org/ proceedings/lrec2008/pdf/67_paper.pdf Kucsma, Jason, Kevin Reiss and Angela Sidman. “Using ...

  • Energetska tranzicija u domaćinstvima: analiza usaglašenosti Srbije sa paketom „Čista energija za sve Evropljane“ / Energy Transition in Households: Analysis of Serbia’s Compliance with the „Clean Energy for All Europeans“ Package

    Boban Pavlović, Aleksandar Madžarević, Dejan Ivezić, Marija Živković, Dušan Mojić (2024)
    Zahvaljujući svojoj složenosti i heterogenosti, sektor domaćinstva predstavlja neizostavnu tačku u politikama energetske tranzicije. U Evropskoj uniji, potrošnja energije u domaćinstvima čini oko 26% finalne potrošnje energije, dok u Srbiji ovaj sektor ima najveći udeo u finalnoj potrošnji, što čini oko trećinu finalne potrošnje. Primenom mera energetske efikasnosti moguće je ostvariti značajne energetske uštede, što zajedno sa smanjenjem i supstitucijom upotrebe fosilnih goriva vodi manjem doprinosu klimatskim promenama i značajnom smanjenju zagađenja vazduha. Paket zakonskih mera “Čista energija za ...
    energetska tranzicija, paket čiste energije, regulatorni okvir, energetska politika, domaćinstva, srbija

  • Компарација метода XRF i ICP-MS на узорцима угља и продуктима сагоревања

    Бранко Костић, Ксенија Ераковић, Дејан Прелевић, Сабина Ковач, Драгана Животић (2023)
    геохемија, угаљ, продукти сагоревања, XRF, ICP-MS

  • 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
    ... was the subject of the analysis is located on predominantly anthropo- genically modified, flat agricultural land that is intersected by various existing and planned infrastructure corridors representing some of the spatial limitations for position- ing the wind turbines. The task of the SEA process ...
    ... 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 re- specting ...
    ... positively affect the application of the principle of preventive protection through the opti- mal selection of the number and position of wind turbines on one hand and the objectivity of draw- ing conclusions based on which strategic decisions are made in the final phase of the SEA process, on the other ...

  • An Approach to Efficient Processing of Multi-Word Units

    Cvetana Krstev, Ivan Obradović, Ranka Stanković, Duško Vitas (2013)
    Efficient processing of Multi-Word Units in the course of development of morphological MWU dictionaries is not easy to achieve, especially when languages with complex morphological structures are concerned, such as Serbian. Manual development of this type of dictionaries is a tedious and extremely slow process. To alleviate this problem we turned to our multipurpose software tool, dubbed LeXimir, in the production of lemmas for e-dictionaries of multi-word units. In addition to that, we developed a procedure aimed at making ...
    Natural Language Processing, Grammatical Category, Lexical Representation, MWU, multi-word unit
    ... e-dictionaries of Serbian simple words, was subsequently implemented as a new functionality of LeXimir. In this paper we present our approach, and offer an eval- uation of the performance of the new functionality of LeXimir, and hence of our procedure, obtained through two rounds of experiments on ...
    ... University of Belgrade — Faculty of Mining and Geology, Djušina 7, 11000 Belgrade, Serbia, e-mail: ivano@rgf.bg.ac.rs Ranka Stanković University of Belgrade — Faculty of Mining and Geology, Djušina 7, 11000 Belgrade, Serbia, e-mail: ranka@rgf.bg.ac.rs Duško Vitas University of Belgrade — Faculty of Mathematics ...
    ... Efficient Processing of Multi-Word Units 19 recognition of names of persons and of various functions they might perform within the society [10]. Local grammars for recognition of functions can recognize various syntactic structures but, naturally, not all of them. The use of MWUs can contribute to ...

  • BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties

    Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković (2023)
    To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ...
    ferroelectric, dielectric properties, magnetic properties, titanate/ferrite composites, phase composition
    ... performed according to a modified Faraday method using a laboratory weighing scale (Sartorius PRACTUM 124-1S) with a sensitivity of 107 kg and a magnetic field strength at the sample placement site of 50 kA/m. The heating rate was 20 "C/min. Dielectric properties of the sintered samples were ...
    ... University of Belgrade, Studentski Trg 12-16, 11000 Belgrade, Serbia Department of Materials, “Vinča” Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia Faculty of Mining, and Geology, University of Belgrade, Djušina 7, 11000 ...
    ... the terms and conditions of the Creative Commons Attribution (CC BY) license (https:/ / creativecommons.org//licenses/by/ 4.0/). Department of Chemistry, University of Belgrade-Institute of Chemistry, Technology and Metallurgy, Njegoševa 12, 11000 Belgrrade, Serbia ? - Faculty of Physics, ...

  • Strukture kristala - odabrana poglavlja iz kristalografije i njena multidisciplinarnost

    Ljiljana Karanović (2024)
    Kristalografija

  • Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation

    Taco Broerse, Nemanja Krstekanić, Cor Kasbergen, Ernst Willingshofer (2021)
    kontinentalna tektonika: kompresija, kontinentalna tektonika: ekstenzija, kontinentalna tektonika: transkurentni i transformni rasedi, pukotine, rasedi, zone snažnih deformacija, kinematika deformacija kore i omotača, teorijska mehanika, modelovanje
    ... The laboratory model consists of a single 2 cm thick brittle layer made of dry quartz sand, sieved to grain sizes of 100–300 μm, with density of ρ = 1.500 kg m–3, a coefficient of peak friction μP = 0.63 and cohesion of 10–40 Pa (Willingshofer et al. 2018). The length ratio L∗ = Lmodel/Lnature = 1.5 × ...
    ... provide a constant ratio for the two principal strains for extension, strike-slip (simple or pure shear) and shortening, irrespective of the amount of deformation (Fig. 7). For oblique deformation this ratio only slightly changes with increasing deformation, but for our qualitative measure of strain type ...
    ... H. & Viggiani, G., 2011. Characterization of shear and compaction bands in a porous sand- stone deformed under triaxial compression, Tectonophysics, 503(1–2), 8–17. Chen, Z., Schellart, W.P. & Duarte, J.C., 2015. Quantifying the energy dis- sipation of overriding plate deformation in three-dimensional ...