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Упит dcterms_subject_txt:određivanje Pb (II) and Cd(II)

2386 items

  • 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
    ... mation and Linking, (ii.) Annotations (NIF, Web Annotation) (Hellmann et al. 2013), and (iii.) OntoLex extensions: vartrans for representing translations and term variants (based on the lemon translation module, (Gracia et al. 2014)), lexicog11 – lexicography module (Bosque-Gil, Gracia, and Montiel- ...
    ... linguistics and natural language processing (NLP). The goal of this 15th EUROLAN School was to bring together scholars, teachers and students of linguistics, NLP and information technology to discuss the principles and best practices for repre- senting, publishing and linking linguistic data and the issues ...
    ... on February 8-12, 2021 and was aimed at students, academics, and practition- ers wishing to learn the basics of Linguistic Data Science. During the training school, the participants were introduced to a wide range of topics: from Semantic Web, RDF and on- tologies, to modeling and querying linguis- tic ...

  • Improved structural model of Pb-doped γ-Bi2O3: (Bi23.68Pb0.32)(Bi1.28Pb0.72)O38.48

    Dapčević Aleksandra, Poleti Dejan, Karanović Ljiljana (2012)

  • Nova saznanja o geologiji Vrdničkog ugljenog basena (severna Srbija)

    Rundić Ljupko, Knežević Slobodan, Rakijaš Milovan, Kukavica Marija (2013)

  • Pb-doped y-Bi2O3 phase in the Bi2O3- PbO phase diagram - Област y-Bi2O3 фазе допиране оловом у фазном дијаграму Bi2O3- PbO

    Dapčević Aleksandra, Poleti Dejan, Karanović Ljiljana (2011)

  • Petrogenesis of orogenic lamproites of the Bohemian Massif: Sr-Nd-Pb-Li isotope constraints for Variscan enrichment of ultra-depleted mantle domains

    Krmíček Lukas, Romer Rolf, Ulrych Jaromír, Glodny Johannes, Prelević Dejan (2016)

  • Analiza rada električnih centrifugalnih pumpi

    Milica Stanojević (2024)
    Ovaj rad analizira rad električne centrifugalne pumpe (ESP) u naftnoj industriji, sa fokusom na problem taloženja kamenca (karbonatnih naslaga) unutar sistema. Električne centrifugalne pumpe (ESP) predstavljaju srce mnogih naftnih bušotina. Njihova visoka pouzdanost i sposobnost rada u zahtevnim uslovima čine ih neophodnim za stabilnu i kontinuiranu proizvodnju.Senzori igraju ključnu ulogu u praćenju rada ESP sistema i detekciji ranih znakova taloženja kamenca. Problem taloženja kamenca je izuzetno značajan, jer može dovesti do smanjenja efikasnosti pumpe, povećanja troškova održavanja, i dugoročnih zastoja ...
    električne centrifugalne pumpe (ESP), formiranje kamenca (karbonatnih naslaga), hemijski inhibitori
    ... žhttps:/bartec.com/products-solutions/product- finder/product-detail/increased-safety-grp-enclosures-and-junction- boxes-07-51-ex-e-ii 7. ChampionX , nd. URL: https:/www.championx.com/products-and- solutions/artificial-lift-technologies/electrical-submersible-pumping- systems/esp-surface-controls/ ...
    ... tečnosti, kao što su voda ili hemikalije, u rezervoare ili bušotine. Ovaj proces utiskivanja pomaže u povećanju stepena iskorišćenja nafte, određivanju pritiska u rezervoarima i upravljanju neželjenim proizvoljnim efektima. Međutim, često zanemaren, ali ključan izazov sa kojim se industrija susreće ...
    ... i stroncijum sulfat. Hemijski sastav utisnutih tečnosti, temperatura, pritisak, pH vrednost ı rastvorljivost minerala igraju ključne uloge u određivanju sklonosti za taloženje naslaga (Đorđević, 2022). 5.3 Uzroci ı posledice Faktori koji doprinose formiranju naslaga unutar sistema za utiskivanje: ...

  • Beaverite as weathering product on waste rocks from the Pb-Zn mine Rudnik, Serbia

    Zdravković Alena, Pačevski Aleksandar, Rosić Aleksandra, Šarić Kristina, Matović Vesna, Erić Suzana (2015)

  • Variscan granitoids of the East Serbian Carpatho-Balkanides: A geodynamic snapshot from new U/Pb zircon dating

    Kristina Šarić, Irena Peytcheva, Bojan Kostić, Dejan Prelević, Suzana Erić, Vladica Cvetković, Dragan Jovanović (2017)

  • Polymetallic Cu-Bi-(Pb-Zn-Co-Ag) mineralization of the Perin Potok locality near Bor, Serbia

    Pačevski Aleksandar, Šarić Kristina, Cvetković Vladica (2013)

  • Oligocene shoshonitic rocks of the Rogozna Mts. (Central Balkan Peninsula): evidence of petrogenetic links to the formation of Pb-Zn-Ag ore deposits

    Borojević-Šoštarić Sibila, Cvetković Vladica, Neubauer Franz, Palinkaš Ladislav, Bernroider M., Genser Johann (2011)

  • Primer mineraloške karakterizacije srednjovekovne šljake iz oblasti Pb-Zn rudnika „Rudnik” kao dela istraživanja u arheotehnologiji

    Alena Zdravković, Suzana Erić, Kristina Šarić (2020)

  • 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
    ... the gas is dissolved in the oil, and the volumetric efficiency is solely a function of the oil formation volume factor Bo. The volumetric efficiency under conditions below the saturation pressure can be calculated using the following formula: qo+qw H| 3.3 ii qoBo+qwBw+(Rp-Rs)qoBg — Rp - production ...
    ... 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 second part involves an analysis and calculations using the "RODSTAR", "QRod" and "Prosper" software, which ...
    ... including: maximum stress, the range of maximum and minimum stress, and the number of strokes per minute. All these factors affect material fatigue and the potential for rod failure,. In some cases, to reduce loads and investments in the lifting assembly and to increase the depth of the pump installation ...

  • Еоценска фауна југозападног дела Сирт басена (Либија)

    Љупко Рундић, Мери Ганић (2020)
    Еоцен, крупни мекушци, нумулити, ЈЗ Сирт басен, Либија

  • Development of the Availability Concept by Using Fuzzy Theory with AHP Correction, a Case Study: Bulldozers in the Open-Pit Lignite Mine

    Stevan Đenadić, Dragan Ignjatović, Miloš Tanasijević, Uglješa Bugarić, Ivan Janković, Tomislav Šubaranović (2019)
    Availability is one of the most used terms in maintainability engineering. This concept is used to denote: The quality of service of an engineering system, i.e., machines, weak points’ analysis, asset management, as well as making decisions in the process of life cycle management. Availability is an overall indicator and contains partial indicators that are oriented towards reliability, maintenance, and logistical support. Availability presents a variable value and changes in time and space. Usually, availability is shown as the ...
    raspoloživost, fazi teorija, AHP višekriterijumska analiza, eksperska ocena, buldozer
    ... composition will be shown according to the algorithm, Section 2.2.1: (i) Input data are of fuzzy relationship: {urg7-N, UmB1-N, and [sp1-n (9). Energies 2019, 12, 4044 13 of 18 (ii) In this case, it is possible to form: C = 103 = 1000 combinations. The combinations carry the code mark in the general record: ...
    ... ‘A’ and 30% to grade ‘B’. For indicator M he assigned 40% to grade ‘A’ and 60% to grade ‘B’, while for indicator S, he assigned to grades ‘A’ and ‘B’ 30% to 70%, respectively. The other five machines were also evaluated following the same methodology, and the results are shown in Tables 4 and 5. ...
    ... methodology, M.T. and I.J.; validation, D.I. and T.S.; formal analysis and writing—original draft preparation S.D. Funding: This research and the APC was funded by Ministry of Education and Science of the Republic of Serbia within the framework of Programme of research in the field of technological d ...

  • Uticaj raspadanja na stabilnost kosina u mekoj stenskoj masi

    Anđela Despotov (2024)
    U radu je opisano ponašanje mekih stenskih masa koje su izložene porecesu raspadanja tokom određenog vremenskog perioda. Meke stenske predstavljaju kritične vrste stenskih masa pošto izazivaju različite probleme tokom izvođenja građevinskih radova. Meke stene mogu biti sedimentne stene, raspadnute metamorfne i magmatske stene. Odlikuju se niskim vrednostima čvrstoće, visokom deformabilnošću, visokom plastičnošću, podložne su dezintegraciji i fizičko-hemijskom raspadanju, odnosno ubrzanom dejstvu površinskog raspadanja usled atmosferskih uticaja.Za klasifikaciju mekih stenskih masa koriste se modifikovane verzije već postojećih klasifikacionih sistema. Jedan ...
    meke stenske mase, dezintegracija, klasifikacioni sistemi, Slake durability test
    ... kategorije prema američkom standardu ASTM D 4644 (2008): I - uzorak ostaje praktično nepromenjen II - uzorak se sastoji od sitnih i krupnih fragmenata III - uzorak čine samo sitni fragmenti Za određivanje Indeksa otpornosti prema raspadanju Id, koristi se sledeća Jednačina: la(2)=[(Wr-C}/(B-C)} x ...
    ... čvrstoće na smicanje. Metodologija određivanja otpornosti prema raspadanju data je kroz opit pod nazivom Slake durabiliy test. Na osnovu ovog opita uzorak stenske mase se može opisati kroz tri različite 33 kategorije: I - uzorak ostaje praktično nepromenjen, II - uzorak se sastoji od sitnih i krupnih ...
    ... loma (Botts, 1998)..........c.aaaaanaa a aeaneakateet 20 Slika 8. Izgled aparata za određivanje otpornosti prema raspadanju proizvođača Matest i dimenzije aparata (ASTM D-4644-04) Slika 9. Primer određivanja koeficijenta raspadanja DR na bazi dijagrama granulometrijskog sastava (Gautam i Shakoor ...

  • Основи гравиметрије - практикум

    Ивана Васиљевић, Снежана Игњатовић (2019)
    гравиметрија, гравиметријска мерења

  • 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

  • Optimizacija dužine strele rotornih bagera u funkciji stabilnosti kosina i efektivnosti rada na površinskim kopovima lignita Srbije

    Branko M. Petrović (2016-07-12)
    Rotorni bageri su mašine koje se u današnje vreme najviše primenjuju uprocesu masovne eksploatacije uglja zahvaljujući, pre svega, nizu tehničkoeksploatacionihprednosti u odnosu na druge vrste bagera. Raznovrsnirudarsko-tehnički zahtevi otkopavanja doprineli su razvoju nekoliko tipova ovihmašina, tako da svaki od njih ima svoje prednosti i nedostatke u odnosu nadrugi tip.Predmet istraživanja u disertaciji odnosi se na izbor optimalnekonstrukcije strele bagera i njene usaglašenosti sa uslovima radne sredine kojiće vladati na površinskim kopovima lignita Srbije, imajući u vidu složene usloveeksploatacije (velika ...
    površinski kop, parametri bloka, kapacitet, rotorni bager, strelabagera, geomehanika, stabilnost kosina, ekonomija
    ... 0.4D 0.5D s ϕ D 6 αB αF Sx 3 2 1 4 5 z B 47 H hI II hI I hg hI V hd r hV hI V hI II hI I βè hr d hr IV hr III hr II hr g Slika 3.11. - Šema za određivanje visine rezova Broj rezova po visini bloka (ceo broj), može se dobiti iz uslova: 𝐻 (0 ...
    ... 2013, Veljkovic 12 SchRs 630 A = 22 m standardo otkopavanje Sirina bloka II. Istrazivanja u okviru selektivnog otkopavanja „Sirina bloka u funkciji ugla zaokretanja strele radnog tocka“ Fol. 10 Slika 2.4. – Određivanje širine bloka ThyssenKrupp Resource Technologies Excellence in Technology ...
    ... 168 [21.] Jakovljević I. ; ODREĐIVANJE OPTIMALNIH PARAMETARA ROTORNIH BAGERA U FUNKCIJI OTPORA NA KOPANJE, Doktorska disertacija, Beograd, 2008. [22.] Jordan D. Bradford, Miller W. Thomas, Dolvin D. Steven,; FUNDAMENTALS OF INVESTMENTS : VALUATION AND MANAGEMENT, McGraw-Hill, New York ...

  • 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)
    ... logv=logR" +logC; j v j R p y: 108 ii Š (6) where C is a constant of integration. Equation (6) can be written in the form: logv=logC·R"; () 4. MODELS FOR DETERMINING PARAMETERS FOR ROCK MASS OSCILLATION EQUATION In the Equation (1) tvo parameters appear, K and m, which need to be determined for ...
    ... of kilograms per a drillhol and blasting with dozens and even hundreds of tonnes of an explosive are being apllied in the world nowdays. Such large quantities of an explosive can cause seismic shocks with the intensity that can have hazardous impact on the environment and result in moving of buildings ...
    ... monitoring site r , reduced to the total quantity of the explosive Q i.e., R =%č. Parameters K and m are conditioned by } v characteristics of the rock mass and blasting conditions. Thus, V is a decreasing and convex function of the variable R. By applying the equation of rock mass oscillation while ...

  • Транспортни систем за руду на површинском копу Бувач

    Никола Аџић (2024)
    У општем делу овог рада ће бити наведени утоварно-транспортни системи, њихова подела и основни елементи. У оквиру тога ће бити детаљније објашњени сви појединачни делови ових система као што су багери, камиони, дробилице и транспортери са траком. Даље ће бити наведени програмски пакети који се користе за прорачун ових система Talpac који се користи за прорачун дисконтинуалног транспорта и Helix који се користи за прорачун транспортера са траком. У специјалном делу су наведени параметри које мора да испуни пројектовани ...
    транспортни систем, камион, багер, транспортер са траком, дробилица
    ... CHCTEM_1— BAFEP PC 1250/21 (6.5 mž) - 2 KAMMOHA (77 t) Marepuja.n KomyHukatuja Bpoj cMeHa y rOJUHH bpoj onmeparHBHHX CaTH y TrOJUHHH Bpoj cd)cKTHBHHX pa/IHHX CaTH y TOJUHHH Koe()unjeHT MeXaHHuKC PacIIOJIOKHBOCTH Koe()HuunjeHT HIOIIyPbCHOCTH KaILIIHKC [[poceuHa 3anpceMHHa KaliIHKc [[poceuHa ...
    ... CHCTEM_2— BAFEP PC 1250/21 (6.5 mŠ) - 3 KAMMOHA (63 t) Marepuja.n KomyHukatuja Bpoj cMeHa y rOJUHH bpoj onmeparHBHHX CaTH y TrOJUHHH Bpoj cd)cKTHBHHX pa/IHHX CaTH y TOJUHHH Koe()unjeHT MeXaHHuKC PacIIOJIOKHBOCTH Koe()HuunjeHT HIOIIyPbCHOCTH KaILIIHKC [[poceuHa 3anpceMHHa KaliIHKc [[poceuHa ...
    ... CHCTEM _5— BAFEP PC 1250/21 (6.5 mŠ) - 3 KAMMOHA (77 t) Marepuja.n KomyHukatuja Bpoj cMeHa y rOJUHH bpoj onmeparHBHHX CaTH y TrOJUHHH Bpoj cd)cKTHBHHX pa/IHHX CaTH y TOJUHHH Koe()unjeHT MeXaHHuKC PacIIOJIOKHBOCTH Koe()HuunjeHT HIOIIyPbCHOCTH KaILIIHKC [[poceuHa 3anpceMHHa KaliIHKc [[poceuHa ...