Претрага

Упит dcterms_subject_txt:MIS 5 to MIS 3

1887 items

  • Optimizacija parametara reza rotornog bagera pri otkopavanju materijala sa povećanom čvrstoćom

    Saša D. Bošković (2016-09-09)
    Otkopavanje materijala rotornim bagerom je veoma sloţen fiziĉko-mehaniĉki proces. Pokazatelji efektivnosti tog procesa zavise od velikog broja raznovrsnih ĉinilaca od kojih se posebno mogu istaći: fiziĉko-mehaniĉke karakteristike materijala koji se otkopava, reţim rada bagera i izbor tehnoloških parametara bloka, odreska i reza, geometrije vedrica i zuba itd. Poseban problem se javlja kod otkopavanja materijala povećane ĉvrstoće, što je ĉest sluĉaj na našim površinskim kopovima. Dimenzionisanje specifiĉne sile kopanja bagera prema manjim masama izuzetno ĉvrstog materijala je neracionalno i rešenje ...
    rotorni bager, parametri reza, otpor na kopanje, dinamika bagera, kapacitet, optimizacija, specifična potrošnja energije
    ... sluĉaju dolazi do ravnomernijeg rada, ali i do pada kapaciteta, a u drugom sluĉaju je to obrnuto. Iz svega toga se izvodi zakljuĉak da je neophodno smanjiti razmak izmeĊu zuba 2, 3, 4 i 5 pogotovu i zbog toga što se debljina reza u procesu kopanja smanjuje od maksimuma do 0. Slika 2.20. Raspored ...
    ... domenu, i to odvojeno za horizontalni (a) i vertikalni rez (b). a) b) Slika 8.13. Uporedni prikaz ubrzanja u vremenskom domenu za horizontalni rez (a) i vertikalni rez (b) 0 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 U ...
    ... potrošnja energije 2 3 5 4 5 8 5 8 9 Otpor materijala na kopanje 4 5 6 5 5 4 4 5 5 Dinamiĉko ponašanje bagera 8 3 4 7 7 6 7 8 8 Tehniĉki kapacitet bagera 3 4 6 4 7 8 6 8 9 Vrednosti svake alternative dobijaju se tako što se teţina dodeljena kriterijumu pomnoţi sa merom alternativne ...

  • Верификација етажних транспортера на угљеном систему – површински коп Дрмно

    Тамара Андрејевић (2024)
    У савременом рударству, површински копови угља наилазе на различите проблеме које треба превазићи зарад добијања потребне количине угља. Као највећи потрошачи овог енергента јављају се термоелектране, где на основу овога можемо да закључимо колико су блиско повезани добра и континуирана производња на површинском копу и рад термоелектрана. Са циљем да се обезбеди стабилна и континуирана производња, потребно је да се направи добар одабир транспортера. У овом раду, за потребе верификације затезне чврстоће траке и снаге погона транспортера, коришћен је ...
    транспортна трака, снага погона, затезна чврстоћа, угаљ, Дрмно, Helix
    ... yroBapa (m) 8,3 9,5 6,5 10,5 Maca 0arepa (t) 560 530 665 1000 Cpe;ubu npurucak Ha To (N/cm?) 10,1 9,5 12,4 11 MakcuMaJIHO J103BOJbeHH HarH0 y pajty (%) 5 3 3 3 Makcuwa;jtHo J003BOJbeHH HarHO y TpaHcnopry (%) 10 5 5 5 Munumaintu paynijyc KpiBHHe (m) 10 il - 50 Cno0oJtan yrao pe3ab»a, JIcBH/necHu ...
    ... 266 266 Cpe;ubu npurucak Ha To (N/cm?) 7,7 7,7 MakcHMaJIHO JIO3BOJbCHH HarH0 y pajty (%) 5 5 MakcHMaJIHO JIO3BOJbCHH HarH0 y TpaHcnopry (%) 10 10 Munumaji pajiijyc KpHBHHc (m) 12 12 SchRs800.15/1.5 (58): IIK JipMHo ERs710.17,5/13-16 (V): IIK JipMHo SRs470.20/3 (B12): IIK JipMHo Cauka 29 ...
    ... yoice; 2. onpyee 3a chpeuasatbe KuOatba cuoypHocHoe yoitcema; 3. KonHmpo-ana kpematba mpake no ocu, 4. koRmpoana: 0p3uHe 6y0ba, npoknusasatba mpake Ha Oy0!by, mewznepamype oomaua, aužaoicogaHe cHaze, Jame3He cCune Ha 0y0t5y;5. KkoRmpo/ta 0p3uHe mpake, 6. 3ayunu u ceemnocHu cuoHanHu ypeljaju; 7. Ocmekmop ...

  • Indexing of textual databases based on lexical resources: A case study for Serbian

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović (2015)
    In this paper we describe an approach to improvement of information retrieval results for large textual databases by pre-indexing documents using bag-of-words and Named Entity Recognition. The approach was applied on a database of geological projects financed by the Republic of Serbia in the last half century. Each document within this database is described by metadata, consisting of several fields such as title, domain, keywords, abstract, geographical location and the like. A bag of words was produced from these ...
    ... Di, where i = 1, . . . N and N is the size of text collection; 3. Recognizing NEs and assigning the chosen types to documents; 4. Selecting ungrammatical words Tij and calculating their frequencies nij for each Di, i = 1, . . . N ; 5. Calculating the relative frequency tfij for each term Tij in a text ...
    ... http://dx.doi.org/10.1007/3-540-51465-1 3 3. Hiemstra, D.: Using language models for information retrieval. Taaluitgeverij Nes- lia Paniculata (2001) 4. Jackson, P., Moulinier, I.: Natural language processing for online applications: Text retrieval, extraction and categorization, vol. 5. John Benjamins Publishing ...
    ... Improvement 11.49% The evaluation revealed that some NEs referring to the same entity occur in various forms which can deteriorate search results. For instance, the name of one person that documents refer to frequently occurs in 12 different forms:5 Dr Petar Petrović, Mr Petar Petrović, Prof. dr Petar Petrović ...

  • Претрага корпуса заснована на употреби екстерних лексичких ресурса путем веб-сервиса

    Милош Утвић, Ранка Станковић, Александра Томашевић, Михаило Шкорић, Биљана Лазић (2019)
    У раду се разматра хибридни приступ претрази корпуса, илустрован на примеру алатки OCWB и NoSketch Engine, примењених на специјални корпус из области рударства (РудКор) и Корпус савременог српског језика (СрпКор). Разматрани приступ комбинује постојеће могућности алатки OCWB и NoSketch Engine, које своју претрагу заснивају на лингвистичкој анотацији корпуса, са новим могућностима претраге у виду консултовања екстерних језичких ресурса (морфолошки електронски речници српског језика и лексичка база података Српски ворднет). Хибридни приступ је реализован надоградњом вебсучеља која поменуте алатке користе ...
    корпус, рударство, претраживање информација, проширивање упита, лексички ресурси, лексичке релације
    ... Табелу 5) укључујући и њихову флектив- ну парадигму, као и облике леме zatvor антонимија / antlemma [antlemma=»opovrgnuti»] антоними леме opovrgnuti (в. Та- белу 5), укључујући и њихову флективну парадигму хиперонимија / hyperlemma [hyperlemma=»ptica»] хипероними леме ptica (в. Табелу 5), укључујући ...
    ... а јединица (једночлана лексема) и поли- лексемска јединица (вишечлана лексема, в. Табелу 5, геолошки процес). Та- кође, одговор веб-сервиса може садржати и монолексемске и полилексемске јединице (в. Табелу 5, казнени завод као синоним за лексему затвор). Пошто процесори упита алатки OCWB и NoSketch ...
    ... цртама, описује лингвистичка анотација корпуса РудКор и СрпКор2013, као и могућности претраге тих корпуса по- моћу алатки OCWB и NoSketch Engine, утемељене на описаној лингвистич- кој анотацији. Одељак 3 даје преглед веб-сервиса за експанзију упита над корпусом који су засновани на лексичким и те ...

  • Evaluation of the effects of wastewater heat pump integration into district heating systems by simulation

    Dejan Ivezić, Marija Živković, Dimitrije Manić, Aleksandar Madžarević, Boban Pavlović, Dušan Danilović (2023)
    The integration of wastewater heat pumps (using purified water) in district heating systems is analyzed in this paper. The simulation procedure is proposed to analyze the impacts of stochasticity of purified water temperature and flow to heat pump integration and operation. The analysis includes calculation of the daily and seasonal coefficient of performance, as well as fossil fuel savings and CO2 emission reduction due to wastewater heat pump use. The proposed procedure is implemented for the case study in ...
    otpadne vode, toplotna pumpa, daljinsko grejanje, simulacija

  • Idejno rešenje zaštite površinskog kopa Zapadni Kostolac od površinskih i podzemnih voda

    Željko Savić (2024)
    Svaki veći površinski kop ima dobro razvijene etaže, pa samim tim i veće površine na koje dospe površinska voda, koju je potrebno prikupiti i dirigovano provesti do odgovarajućih recipijenata, kako ne bi ugrozila eksploataciju otkrivke i uglja.
    odvodnjavanje, kanali, vosabirnici, bunari, ekrani
    ... pumpe(kW) cevovoda (m) -2 SB 43 763 5 5650 -2 L-1 18 720 5 1630 -1 L-2 39 677 5 4130 || L-3 48 2208 5 5370 2 SB 11 638 7 1590 3 SB 17 479 15 2070 3 L-4 40 2000 7 3880 4 SB 19 900 19 2177 5 SB 18 098 9 2300 5 L-5 31 798 7 3162 6 SB 17 714 5 2780 7 L-6 46 2622 7 4680 L L-7 30 ...
    ... dubina (m) -2 SB -2 35 43 1763 41 -2 L-1 -2 1 18 720 40 -1 L-2 -1 3 39 1677 43 || L-3 || 5 48 2208 46 2 SB 2 35 11 638 58 3 SB 3 35 17 1479 87 4 L-4 3 7 40 2000 50 4 SB 4 35 19 1900 100 5 SB 5 35 18 1098 61 6 L-5 5 8 31 1798 58 6 SB 6 35 17 714 42 & L-6 7 10 46 2622 57 9 L-7 8 12 ...
    ... izrade Objekti Broj bunara, Početakrada , Krajrada -2 SB 43 -2 35 -2 L-1 18 -2 || -1 L-2 39 -1 3 || L-3 48 2 5 2 SB 11 2 35 3 SB 17 3 35 3 L-4 40 4 7 4 SB 19 4 35 5 SB 18 5 35 5 L-5 31 6 & 6 SB 17 6 35 7 L-6 46 & 10 8 L-7 30 9 12 10 L-8 25 11 14 12 L-9 46 13 15 14 L-10 ...

  • Valorization of non-balanced coal reserves in Serbia for underground coal gasification

    David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)
    In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...
    ugalj, gasifikacija, zaštita životne sredine, skladištenje, solarna
    ... 3 (3) Methanation _ CO + 3H, – CH, + H,O AH= —206.0 (4) Hydrogenating gasification C+2H,=CH, AH = -87.5 (5) Partial oxidation C + 1/20, - CO AH=-123.1 (6) Oxidation C+O,=CO, AH= -406.0 (7) Baudouard reaction C+CO,-2CO AH = +159.9 The concentrations of various gases relative to the total ...
    ... the assumed UCG exploitation field, fig. 5, the Pilot Plant (with thickness of the coal layer h = 6 m; p,= 1.3 t/mš) needs to be pro- cessed by gasification: 25 m 75m Figure 6. Exploitation Pilot Plant field for O, =75-50·:6·:1.3=29250tofcoal (3) UCG in Serbia Ifsuch a quantity ofcoal ...
    ... ly helps to establish that channel or reaction zone, fig. 3. The injection boreholes Above-ground gas processing plant Syngas HiorNH;? :: are drilled vertically through a semicircular rounded layer prior to entering the part of the coal layer and continues horizontally to the production ...

  • NMR kinetic studies of the interactions between [Ru(terpy)(bipy)(H2O)]2+ and some sulfur-donor ligands

    Aleksandar Mijatović, Biljana Šmit, Ana Rilak, Biljana Petrović, Dragan Čanović, Živadin D. Bugarčić (2012)
    Reakcije supstitucije monofunkcionalnog [Ru(terpi)(bipi)(H2O)]2+ kompleksa, gde je terpi = 2,2′:6′,2″-terpiridin i bipi = 2,2′-bipiridin, sa biološki relevantnim sumporo donorskim ligandima, kao što su tiourea, l-metionin, l-cistein i glutation, proučavane su u vodenim rastvorima tehnikom 1H i 13C NMR spektroskopije. Sve reakcije su proučavajne na pH 7,4, u prisustvu fosfatnog pufera, da bi se oponašalo fiziološko okruženje tokom procesa supstitucije. Reakcije se izvode na 295 K pod uslovima reakcija drugog reda. Uočeni rezultati pokazuju da brzina supstitucije snažno zavisi ...
    Materials Chemistry,Inorganic Chemistry,Physical and Theoretical Chemistry

  • Phase relations and physical indicators of municipal waste from old landfills in Serbia

    Dragoslav R Rakić, Irena G Basarić Ikodinović, Jovana M Janković, Tina D Đurić (2021)
    Due to certain similarities of municipal waste and soil, usually for the determination of basic parameters of physical state, laboratory and field tests which are common in geotechnical investigations are used. It is often to construct an apparatus for special purpose to perform some specific laboratory and field tests. Therefore, different values of indicators of municipal waste physical state can be found in the literature. The basic reasons should be found in different definitions and methods that researchers use ...
    municipal waste, moisture content, unit weight, specific gravity, grain size distribution, porosityGeneral Computer Science
    ... due to components that are tend to absorb water. In this case, average unit weight of components is equal to: 1 — AY, = 1+—· ž W..__—— 7 “/d[ o J s Ti (5) where: Ayi - increase of unit weight of component i In the literature we can find values that range in wide interval (y =3 – 17 ...
    ... correspond medium to well compacted waste (Figure 6). unit weighty (kN/n») unit weight y (KN/m*) 15 20 5 0+ E 10| x _ = 1/b = Ymax ~ Ti E e ii * 20| W kd k:1 ig a _ 8 30 \R Š : - |. Fi 7 Ti m b Š l% waste (kN/mž) (m/kN) (m3/kN) 40 FI poorly 5 2 0.1 .| medium 10 3 0.2 a |j welll 155 ...
    ... ranged from Gs = 1.977 to 2.39, and the highest values were obtained for waste samples with the highest soil material content (Figure 9). 2.391 1003 -24 < ı 2319 | 23 }|G FOR:10| H23 8 604 |2.2 404 |2.1 20 -|EI.926 L a || 12 a |D U -1 U-2 U-3 U-4 U-5 Fig. 9. Laboratory obtained ...

  • 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
    ... components, 20 rules to MWUs with 4 components, 9 rules to MWUs with 5 components, and 5 rules to MWUs with 6 and more components. 4.3 Software implementation To manipulate the strategy in the form of a XML document our tool LeXimir relies on W3C standard languages Xquery and XSLT supported by .Net. ...
    ... variable does not need to instantiate to all values of some grammatical feature. Instead, it can inherit its value from a token itself. In the pattern <$3:Gen==$g> the variable $g inherits its value from the third token. For petokraka zvezda the variable $3 will instantiate to the value f since the ...
    ... second option was even offered. In general, it is safe to say that the results obtained in both evaluation cycles testify to the fact that our approach yielded a strategy and procedure which can greatly contribute to efficient processing of MWUs. 5 Existing and Further Applications The outlined procedure ...

  • Freeze-dried nanocrystal dispersion of novel deuterated pyrazoloquinolinone ligand (DK-I-56-1): Process parameters and lyoprotectant selection through the stability study

    Jelena R. Mitrović, Maja Bjelošević Žiberna, Aleksandar Vukadinović, Daniel E. Knutson, Dishary Sharmin, Aleksandar Kremenović, Pegi Ahlin Grabnar, Odon Planinšek, Dominique Lunter, James M. Cook, Miroslav M. Savić, Snežana D. Savić (2023)
    Recently, nanocrystal dispersions have been considered as a promising formulation strategy to improve the bioavailability of the deuterated pyrazoloquinolinone ligand DK-I-56-1 (7‑methoxy-2-(4‑methoxy-d3-phenyl)-2,5-dihydro-3H-pyrazolo[4,3-c]quinolin-3-one). In the current study, the freeze-drying process (formulation and process parameters) was investigated to improve the storage stability of the previously developed formulation. Different combinations of lyoprotectant (sucrose or trehalose) and bulking agent (mannitol) were varied while formulations were freeze-dried under two conditions (primary drying at -10 or -45 °C). The obtained lyophilizates were characterized in terms ...
    Pharmaceutical Science
    ... 50 100 150 200 Temperature (*C) 'European Journal of Pharmaceutical Sciences 189 (2023) 106557 T+M 1+1] In te ns it y (a .u .) 5 10 15 20 25 30 35 40 45 2 theta (?) Fig. 3. DSC thermograms (a) and XRPD diffractograms (b) of freeze-dried samples with trehalose as cryo-/lyoprotectant obtained ...
    ... lyophilization. According to the results of this study, primary drying should be performed below Tg to promote interactions between lyoprotectant and the nanocrystals. In all cases, a sucrose/ trehalose to mannitol ratio of 3:2 at a total concentration of 10% lead to the maintenance of particle ...
    ... 10% (S+M 2 + 1 10%, S+M 3 + 2 10%, and S+M 1 + 1 10%). The particle size remained almost the same and the PDI was less than 0.200, indicating uniform particle size. However, at a sucrose to mannitol ratio of 2 to 1 (S+M 2 + 1 10%), the cake collapsed, which was a reason to exclude this formulation ...

  • Procena aktivnosti upravljanja održavanjem opreme za dubinsko bušenje nafte i prirodnog gasa

    Iva Filipov (2024)
    Primarni fokus održavanja je sprečavanje zastoja u radu, koji može dovesti do značajnih finansijskih gubitaka. Redovne provere i monitoring performansi opreme omogućavaju pravovremeno otkrivanje problema i smanjenje rizika od havarija. U ovom kontekstu, korišćenje naprednih tehnologija, poput softverskih alata za upravljanje održavanjem, igra značajnu ulogu u optimizaciji procesa. Osim tehničkog održavanja, obuka osoblja o pravilnoj upotrebi opreme i sigurnosnim procedurama je od suštinskog značaja. Efikasna komunikacija između članova tima i jasne smernice za rad doprinose smanjenju rizika i povećanju produktivnosti. Upravljanje održavanjem takođe zahteva analizu troškova, kako bi ...
    održavanje, zastoj, oprema, upravljanje, efikasnost, ekonomičnost
    ... 2.1 Opšte karakteristike bušotine......aaaaaaaa a aaaaaananı 4 2.2 Izrada bušotina ...č aaaaaeaaaaeaaaaaaeaaNakatt 5 2.3 Bušaća postrojenja.....aaaaa a aaaaaaaaaaaaaaatattt 7 3. PROCES ODRŽAVANJA OPREME ZA DUBINSKO BUŠENJE......... 12 3.1 Održavanje bušaćeg postrojenja .. aaanaonoaı 14 3.3 ...
    ... stena: rotaciono i udarno bušenje b) Fizičko-hemijsko razaranje stena 2. Iznošenje čestica razrušenih stena iz bušotine (čišćenje bušotine), 5 3. Zaštita zida bušotine kolonom zaštitnih cevi. (1) Pomoćni radovi u procesu izrade bušotine obuhvataju nekoliko ključnih operacija: • Pripremne ...
    ... sigurnijeg kretanja, posebno u opasnim situacijama. 4. Čišćenje i pregled elemenata klinova i klinova, zamena istrošenih delova, te kontrola zateznih linija. 5. Podmazivanje delova postrojenja i opreme prema utvrđenom rasporedu održavanja. 6. Hlađenje elemenata koji su izloženi stalnom trenju i zagrevanju ...

  • Concepts for Improving Machine Learning Based Landslide Assessment

    Miloš Marjanović, Mileva Samardžić Petrović, Biljana Abolmasov, Uroš Đurić (2019)
    Katastar klizišta, Podložnost, Hazard, Mašinsko učenje, Uzorkovanje, Validacija

  • Geotehnički uslovi izgradnje tunela „Debelo brdo“ na autoputu E-80 Niš - Pločnik

    Dragoslav Rakić, Radojica Lapčević, Irena Basarić Ikodinović, Dragan Lukić (2022)
    Tunel „Debelo brdo“ nazvan je po najizraženijem relјefnom obliku na ovoj drugoj deonici autoputa E-80 Niš – Pločnik. Osnovnu geološku građu na lokaciji tunela čini Mio-Plioceni kompleks heterogenog litološkog sastava. Izgradnja tunela je predviđena delom u otvorenom iskopu dužine 240 m, a delom sa podzemnim iskopom dužine 190 m. U zoni tunela, padina je okarakterisana kao uslovno stabilna, pa bi neadekvatna zasecanja mogla da izazovu klizanja terena. Iz tih razloga, u okviru rada posebno su prikazani geotehnički uslovi izgradnje ...
    Tunel „Debelo brdo“, Geotehnički parametri, Privremene kosine, Šipovi, Podgrada.
    ... tunelskog iskopa pri faktoru stabilnosti Ns > 1, cr. To je neophodno ugraditi oblogu (primarnu podgradu) dovoljne nosivosti i krutosti skopa, ali on inu od 3-6 m. Tabela 3. Fazni prikaz simulacije iskopa i podgra Korak 1 D Korak 2 F Korak 3 Inicijalno stanje Korak 4 Relaksacija stenske ...
    ... izgradnju autoputa E-80 (SEETO Ruta 7): od administrativnog prelaza Me izgradnje objekata p. [3] ; ; ; ; uslovi izgradnje autoputa E- - -82. [4] ; ; izgradnje autoputa E- - -92. [5] ; ; ; ; Merdare, Zbornik radova - CD (Book of papers - Srpski kongres o putevima, Beograd, str. ...
    ... terena. Iz tih razloga, u okviru rada posebno su prikazani izgradnje tunela u otvorenom iskopu ( je projektno : Tunel Debelo brdo G parametri, Privremene kosine, ipovi, Podgrada. GEOTECHNICAL CONDITIONS FOR THE CONSTRUCTION OF ON THE HIGHWAY E- - 1, 2 Ikodinovi 3, 4 1 University ...

  • 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
    ... 71.1(4)% 23.5(3)% 5.4(5)% BaTiOa ZnFe>pOx BaFeop.12s Tio.gz5Op.92 BaTiOx/ZnFe>»Oa Tetragoonal (P4/mmm) Spinel (Fd-3m) (P6x/mmc) 1300 “C PDF # 01-079-2264 PDEF # 01-078-5429 PDF # 01-089-4605 63.5(3)% 29.6(2)% 6.9(3)%. BaFeo. ps Tio.5 Op.888 BaTiOs Nio.sZno.Fe2Oa ii )F(Ž %3/_ 13;24 604 BaTiOy ...
    ... head was applied to a lower temperature to 150 K. Lakeshore 340 temperature controller with hater attached at the cold head was used to gradual heating; rate of 2.5 K/min up to 400 K. Ferroelectric and leakage current measurements were conducted in the electrical field range of 5-40 kV/cm on the ...
    ... 01-077-9719 : 56(3)% 34(3)% Nio.o2Zno.og8O PDEF # 01-080-3507 1.0(1)% The SEM micrographs for as-prepared powders confirmed the presence of two types of particles, different in size and shape, Figure 2. The particles which belong, to the BaTiOx are bigger (0.5–1 um) in comparison to ferrite particles ...

  • Two approaches to compilation of bilingual multi-word terminology lists from lexical resources

    Branislava Šandrih, Cvetana Krstev, Ranka Stanković (2020)
    In this paper, we present two approaches and the implemented system for bilingual terminology extraction that rely on an aligned bilingual domain corpus, a terminology extractor for a target language, and a tool for chunk alignment. The two approaches differ in the way terminology for the source language is obtained: the first relies on an existing domain terminology lexicon, while the second one uses a term extraction tool. For both approaches, four experiments were performed with two parameters being ...
    Linguistics and Language,Software,Artificial Intelligence,Language and Linguistics

  • A Model for Determining the Dependability of Continuous Subsystems in Coal Mines Using the Fuzzy Logic Approach

    Nikola Stanić, Miljan Gomilanović, Petar Marković, Daniel Krzanović, Aleksandar Doderović, Saša Stepanović (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    fuzzy logic, max-min composition, continuous part of combined system (CCS), open pit, mining, dependability

  • Self-Engineering: Possibilities for Maintenance Operations in the Mining Machines Industry

    Steven Manders, Milorad Pantelić, Vladimir Milisavljević, Alberto Martinetti (2021)
    Self-engineering is a relatively new branch of knowledge that aims to understand how systems could “autonomously” re-configure or repair themselves without the intervention of the operators. A direct field of application is within the maintenance spectrum. Having systems or machines capable of self-detecting or even self-repairing could represent a game-changer, in capital asset fields such as the mining industry in particular. This paper aims to investigate the possible benefits and challenges of self-engineering / self-maintenance concerning mining machines, specifically bucket-wheel ...
    self-engineering, self-maintenance, maintenance operations, mining industry, bucket-wheel excavator, gearbox revitalization

  • Nonequilibrium athermal random-field Ising model on hexagonal lattices

    Svetislav Mijatović, Dragutin Jovković, Đorđe Spasojević (2021)
    Изингов модел, хексагонална решетка

  • Production information system of the Pljevlja coal mine

    Božo Kolonja, Ranka Stanković, Filip Vuković (2018)