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

2386 items

  • Using Query Expansion for Cross-Lingual Mathematical Terminology Extraction

    Velislava Stoykova, Ranka Stanković (2018)

  • Stratigraphy and Microfauna (Radiolarians and Foraminifera) of the Upper Cretaceous (Upper Santonian–Lower Campanian) Carbonate Deposits in the Area of Struganik Village, Western Serbia)

    Liubov Bragina, Nikita Bragin, Luidmila Kopaevich, Nevenka Đerić, Nataša Gerzina Spajić (2020)
    Santonian, Campanian, radiolarians, planktonic foraminifera, biostratigraphy, limestones, Struganik, Serbia

  • Trace elements and garnet formation in a distal skarn zone: a case study of the Rudnik deposit, Central Serbia

    Bojan Kostić, Pavle Tančić, Natalija Batoćanin (2024)
    geohemija granata, retke zemlje, fluidne inkluzije, skarnovsko ležište Rudnik

  • Konzervacija miocenskih kičmenjaka sa lokaliteta Riđake (severozapadna Srbija) iz zbirke Prirodnjačkog muzeja u Beogradu

    Nenad Mladenović (2024)
    U radu je opisana geološka građa terena i metode koje se koriste u paleontologiji za izdvajanje, konzervaciju i restauraciju fosilnog materijala sa lokaliteta Riđake kod Šapca. Prikazana je anatomija fosilnih kičmenjaka. U prosejanom sedimentnom materijalu težine od 4kg pronađeno je 10,798 kostiju, uključujući ostatke Pisces (riba) Amphibia (vodozemaca), Reptilia (gmizavaca), Aves (ptica) i Mammalia (sisara).
    geološka građa, konzervacija, restauracija, Riđake, fosili kičmenjaka
    ... Slika 5 Slika 9 Tabla II Slika 1. Maksila (Reptilia) Slika 2. Premaksila (Reptilia) Slika 3. Pršljen (Reptilia) Slika 4. Femur (Reptilia) Slika 5. Kvadratum (Reptilia) Slika 6. Kosti ekstremiteta (Reptilia) Slika 7. Autotomni repni pršljen (Reptilia) Tabla II Slika 1 Slika 5 Slika ...
    ... vode paleotoka Drine i Save uticale su na snižavanje temperature Jezera, stvarajući nepovoljne ekološke uslove za razvoj faune, što otežava određivanje starosti sedimenta. Paludinski sedimenti sadrže razne komponente, uključujući pesak, alevrit i glinu. Kvartarne tvorevine prekrivaju većinu terena ...
    ... dRE1f6H66) 10.6 Sečenje i glačanje Sečenje ı glačanje fosila se sprovodi radi ispitivanja njihove unutrašnje strukture, što je ključno za određivanje roda ı vrste nekih organizama. Najčešće se prave preseci korala, rudista, brahiopoda i nekih gastropoda, a preseci mogu biti 16 uzdužni ili ...

  • Evidence for Ladinian (Middle Triassic) platform progradation in the Gyulakeszi area, Tapolca Basin, Western Hungary: Microfacies Analysis and Biostratigraphy

    Zsolt Robert Nagy, Nevenka Đerić, Sándor Kovács, Anna Oravecz-Scheffer, Felicitász Velledits, Olga Piros, Gabor Csillag (2014)
    anizik, ladin, karbonati, litostratigrafija, biostratigrafija, konodonti, radiolarije, dijageneza
    ... fragment, and bc: bioclast. Arrows yer, pg: P ii y P ii point to microerosional surface with dolosilt. Note the normal grading in the rudstone layer in 4/1 and in the intraclastic grainstone layer in 4/2-3. In addition, note the increasing amount of spar in the mid-section of 4/1. Sample and scale bar: ...
    ... calcite spar increases and the contact with the overlying layer appears to be gradual with decreasing particle size. The layer was observed to vary in thickness between 3 to 8 centimeters. ii) Cross-laminated, well-sorted peloidal grainstone with some internal normal and inverse gradation (Figs ...
    ... lime- stone in terms of numbers and importance is 7b:pbytes sp. found as reworked bioclasts in the graded grainstone and rudstone facies (MF2, samples Gy1 and 2), in the peloidal bioclastic grainstone and boundstone facies (MF5, samples Gy51 and up) (Fig. 8/1) and, most im- portantly, the “e ...

  • 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
    ... kumulativna masena frakcija prolaza kroz sito određene veličine. Određivanje granulometrijskog sastava šljunka rađeno je po standardu Geotehničko istraživanje i ispitivanje — Laboratorijsko ispitivanje tla — Deo 4: Određivanje granulometrijskog sastava SRPS EN 17892-4:2017 (Slika 4). Metoda seJanja ...
    ... ispitivanje geometrijskih svojstava agregata — Deo &8: Ocena sadržaja sitnih čestica — Ispitivanje ekvivalenta peska na frakciji 0/4 mm. Metoda za određivanje ekvivalenta peska predstavlja brz i jednostavan test za proveru čistoće agregata. Ovim testom se utvrđuje prisustvo i relativna količina čestica ...
    ... OTBOp poramuja e 0 — Slika 10. Mašina za ispitivanje Los Anđeles, Ispitivanje mehaničkih i fizičkih svojstava agregata — Deo 2: Metode određivanja otpornosti na drobljenje, Institut za standardizaciju Srbije SRPS EN 1097-2:2013. 15 2.4.5. Optička analiza Optičke metode spadaju u osnovne ...

  • Upravljanje proizvodnjom nafte – novi alat na bazi fazi logike

    Мирослав Црногорац, Душан Даниловић, Лола Томић (2020)
    ... IA, “Assessment of water resources and water availability in the world”, UN Rep. Compr. Assess. Freshw. Resour. World, Data arch. CD- ROM State Hydrol. Inst., St. Petersburg, Russia, 1998. [17] Saeed Nairizi, “Irrigated Agriculture Development under Drought and Water Scarcity”, Electronic format ...
    ... raznim granama industrije, stoga su ova određivanja od izuzetnog značaja. Ključne reči: Artemisia, isparljiva organska jedinjenja, hidrodestilacija, GC/MS Abstract: The aim of this study was to investigate the difference in chemical composition, yield and physical properties of essential oils in ...
    ... agriculture, and industry; and polluted water can spread illnesses and disease vectors, so clean water is both an environmental and a public health issue. Management of freshwater resources and drawing upon water for functions central to human life, is critical to good social, economic and political ...

  • Хидротермалне промене у издвојеним стратиграфским јединицама у бушотини јужно од Бора

    Павле Јовичић (2024)
    Анализом уступљених узорака из истражне бушотине јужно од Бора, од стране компаније Serbia Zijin Mining, утврђене су хидротермалне промене (алтерације) које прате стратиграфске чланове набушене самом бушотином. Установљене алтерације директно осликавају класично развиће порфирског Cu система, при чему је указано на њихову повезаност са минерализацијом, као и на потенцијалност самог истражног простора којем изабрана бушотина припада.
    Бор, хидротермалне промене, порфир

  • Praktikum iz inženjerske geologije

    Miloš Marjanović, Biljana Abolmasov, Uroš Đurić, Jelka Krušić (2020)
    inženjerska geologija

  • 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
    ... long and short working distance objectives, equipped with an Ar? ion laser (457 nm) and a Peltier cooled CCD detector (resolution <2 cm!), and (ii) a high-sensitivity LabRam Infinity (Dilor, Horiba Jobin Yvon, Lille, France) spectrometer equipped with YAG 532 nm and He 633 nm lasers and a similarly ...
    ... especially in samples a (Figuure 7) and c (Figure 8). This carbon can arise from different origins: (i) the transformation of organic residues during the use of the utensils, (ii) the use of carbon-rich clays (clays with organic (humic) acids exhibit a high plasticity) and/or (iii) the firing, was undertaken ...
    ... ine are found in samples a, b and d, while albite is found only in samples a and b. Crocidolite is found in samples b and d, while tremolite is found in samples b and c. Diopside and orthopyroxene are found in samples b and c, while talc is found in samples c and d. Minor abundant mineral phases ...

  • Using English Baits to Catch Serbian Multi-Word Terminology

    Cvetana Krstev, Branislava Šandrih, Ranka Stanković (2018)
    In this paper we present the first results in bilingual terminology extraction. The hypothesis of our approach is that if for a source language domain terminology exists as well as a domain aligned corpus for a source and a target language, then it is possible to extract the terminology for a target language. Our approach relies on several resources and tools: aligned domain texts, domain terminology for a source language, a terminology extractor for a target language, and a ...
    aligned texts, word alignment, terminology extraction, electronic dictionaries, morphological inflection
    ... for a source and a target language, then it is possible to extract the terminology for a target language. Our approach relies on several resources and tools: aligned domain texts, domain terminology for a source language, a terminology extractor for a target language, and a tool for word and chunk alignment ...
    ... lemmatized and POS-tagged texts 2In this paper we will call ‘source’ language a well-resourced language (English), and ‘target’ language a less-resourced lan- guage (Serbian). 2487 (Bouamor et al., 2012; Vintar and Fišer, 2008), while oth- ers perform full semantic parsing (Moirón and Tiedemann, ...
    ... Dictionary of Library and Infor- mation Science (English/Serbian pairs); • The rule-based system for the extraction and lemmati- zation of potential terminological nominal phrases; • Bilingual Serbian/English list of inflected word forms and MWE pairs derived from bilingual dictionaries and morphological ...

  • Polymorphism and photoluminescence properties of K3ErSi2O7

    Predrag Dabić, Marko G. Nikolić, Sabina Kovač, Aleksandar Kremenović (2019)
    alkalni silikati elemenata retkih zemalja, silikati lantanoida, polimorfizam, fotoluminescencija, kristalna struktura

  • Integrated Stratigraphy of the Middle–Upper Jurassic of the Krížna Nappe, Tatra Mountains

    Renata Jach, Nevenka Đerić, Špela Goričan, Daniela Reháková (2014)
    carbon and oxygen isotopes, radiolarians, calcareous dinoflagellates, radiolarites, Krížna Nappe, West ern Carpathians, Tethys
    ... diverse lithotypes (Figs 3—8): (i) thin- and medium-bedded red limestones, al- ternating with 1—2 cm-thick marls, locally with indistinct nodule development, and concentrations of aptychi (this lithotype bears a resemblance to the Rosso ad 4pfici facies), (ii) massive nodular limestones, where l ...
    ... š"CfRe} @ } 34 @ 120 =| UAZsS 5-7 E E UAZs 4–-10C c <| n kod 110 žLo __ 1 1.5 2 2.5 3 3,5 E}40 6"C{%} = 100. 13, ž Short- and long-term Š"C shifts, excursions ii and trends Lithology UAZs 3-10 [- |-80 Late Kimmeridgian (Moluccana Zone) positive Š"C shift A _ platylimestones @ Middle Oxfordian ...
    ... Tatra Mts, Poland 0500 y P y Fk ii N49%16.137% E20%4.348' - | Suchy Wierch-Havran Unit Ždiarska Vidla P Belianske Tatra Mts, Slovakia. N49"14.588'; E20?12.636' calpionellid biostratigraphic scheme, proposed by Rehakova (2002), were adopted. The rock samples and the thin sections are stored at ...

  • Effectiveness Analysis of Different Bucket-wheel Excavators

    Stevan Đenadić, Predrag Jovančić, Dragan Ignjatović, Miloš Tanasijević, Filip Miletić (2021)
    Coal production in open-pit lignite mines in the Republic of Serbia is performed with continuous work systems. In addition to coal production, the same systems are used for the exploitation of large quantities of overburden. According to the reliability concept, continuous systems are in linear connection. If the failure occurs in one part of the system, that will produce a downtime of the entire system. The initial and most important factor of continuous systems is the bucket-wheel excavator. It ...
    bucket-wheel excavator, open-pit coal mine, mining, multi-criteria decision methods

  • The number of unimodular roots of some reciprocal polynomials

    Dragan Stankov (2020)
    We introduce a sequence P2n of monic reciprocal polynomials with integer coefficients having the central coefficients fixed. We prove that the ratio between number of nonunimodular roots of P2n and its degree d has a limit when d tends to infinity. We present an algorithm for calculation the limit and a numerical method for its approximation. If P2n is the sum of a fixed number of monomials we determine the central coefficients such that the ratio has the minimal limit. ...
    Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomials

  • Процена ризика од удеса на флотацијском јаловишту "Ваља Фундата

    Милица Илиевски (2024)
    У овом завршном раду под називом: „Процена ризика од удеса на флоатацијском јаловишту „Ваља Фундата““ кроз 8 поглавља описане су примењене методе за управљање флотацијском јаловином, као и могући сценарији удеса који могу настати услед нестабилности брана или природних катастрофа.Рад користи технике попут FMEA и ALARP за анализу ризика, при чему се ризик дефинише као функција вероватноће и последица инцидента.Препоручене су мере за смањење ризика и унапређење стабилности брана,укључујући редовно одржавање и надградњу инфраструктуре.Резултати рада указују да је ризик ...
    флотацијска јаловина, процена ризика, рушење бране, удеси, еколошке последице
    ... The paper employs techniques such as FMEA and ALARP for risk analysis, with risk defined as a function of the probability and consequences of an incident. Measures to reduce risks and improve dam stability are recommended, including regular maintenance and infrastructure upgrades. The results of ...
    ... 3x3 3a rponeny pHagka {[1]..aaaaaaaaaaaaaaaknae 11 Cmaka 2.6. Marpuna paauka oOmaka 5X%5 [2}.aadaaaaaaaaaaaaaaaaaaaaaaaaann 12 Cmaka 3.1. Ipaka3 (pb-_rorarujcKor JanOBHIITa al 24 Cmaka 5.1. Onoranujcko janoBumrre „Bajba ODyHaara“ [5].aaaaaaaaaaaaann.. 26 Cmaka 5.2. CeH3MMuku xa3apjt y perHoHy ...
    ... P111/I8 mpenao/ma eMeKTpoHcKy Bep3HJy 3aBpmmHor pama Ha OCHOBHI/IM/MaCTep aKaJIČMCKHM CTyI[I/IjaMa IIOJI HaACJIOBOM: TIponeHa punHka oJ yaeca Ha (pb;ioTatiHijCKOM janoBHmiTy „Bajba ODynHnra“ KojH Je ypabeH o MEHTODpCTBOM BaH.rtpo(.jip. /iparaga Hamsuih (ue, npe3uwe u 36atbe) aa /lrgrajiHH p ...

  • Managing mining project documentation using human language technology

    Aleksandra Tomašević, Ranka Stanković, Miloš Utvić, Ivan Obradović, Božo Kolonja (2018)
    Purpose: This paper aims to develop a system, which would enable efficient management and exploitation of documentation in electronic form, related to mining projects, with information retrieval and information extraction (IE) features, using various language resources and natural language processing. Design/methodology/approach: The system is designed to integrate textual, lexical, semantic and terminological resources, enabling advanced document search and extraction of information. These resources are integrated with a set of Web services and applications, for different user profiles and use-cases. Findings: The ...
    Digital libraries, Information retrieval, Data mining, Human language technologies, Project documentation

  • Hyperpycnites within the Devonian-Carboniferous flysch of the Carpatho-Balkanides (Kostadinovica, eastern Serbia)

    Miloš Radonjić (2020)
    This study presents new discoveries of vascular plants and the trace fossil Dictyodora liebeana (GEINITZ) from the Devonian–Carboniferous Kučaj-Zvonce flysch of the Carpatho-Balkanides and the implications of this fossil association for its sedimentary setting. The occurrence of the described plant debris in a deep-marine environment indicates the presence of hyperpycnites within the siliciclastic turbidites exposed at the Kostadinovica locality. The sedimentological data and the characteristics of the fossil material support the proposed model in which the sediment was at ...
    Mississippian flora, Dictyodora liebeana (GEINITZ), hyperpycnites, Kučaj-Zvonce flysch, Carpatho-Balkanides
    ... activity of the unit led to and accounts for the unfavourable conditions for fos- silization. Overall occurrence and distribution of plant fragments and trace fossils was used as a criterion for sedimentologic and stratigraphic interpretation of the studied section and comparison with similar formations ...
    ... Carinthia II, 189/109, 637–672, Klagenfurt. VAN AMEROM, H.W.J. & KABON, H. (2000): Neue fossile Floren aus dem Nötscher Karbon (2. Teil).– Carinthia II, 190/110, 483–516, Klagenfurt. VAN AMEROM, H.W.J. & KABON, H. (2000): Neue fossile Floren aus dem Nötscher Karbon (3. Teil).– Carinthia II, 193/113 ...
    ... Carnic Alps and the South Karavanke, Lower Carboniferous of the Dinarides, Sredna Gora in Bulgaria) could be better compared based on flo- ral elements and their similar sedimentological characteristics. ACKNOWLEDGEMENT I thank Tom van LOON and Alfred UCHMAN for offering im- portant and helpful comments ...

  • Application of machine learning for diagnosing the operation of a deep well pump in oil production

    Maja Trikić (2024)
    This paper will thoroughly examine how machine learning can improve the diagnosis of deep well pumps by analyzing the role and function of the pumps, dynamograms, sensor technologies, and diagnostic methods.Our analysis will provide insights into modern techniques and approaches for enhancing the performance and reliability of oil production systems, targeting cost reduction and increased operational efficiency.
    deep well pump, dynamograms, machine learning, diagnostics of operating coditions,Random Forest, XGBoost
    ... 2,350 psi O _> BO PB = 2,350 psi Plunger | Axial pressure (PA) = 2,500- 150 = 2,350 psi | PA = O psi PB = O psi Perforations ii Figure 2.2 Operation cycle of the downhole pump 2.3 Importance of efficient pump operation Frequent changes in pump operation and fluid composition lead ...
    ... the fluid and fills the pump cylinder; the discharge valve is open, and the suction valve is closed. The system is continuously monitored to maintain optimal operating conditions. Downstroke Upstroke Tubing Landing nipple e ć Pump Casing hg barrel _—l Burst pressure d (PB) = 2,500-150 ...
    ... subsurface equipment. This system consists of the driving unit (horsehead), a string of sucker rods, and the downhole pump. Walking Beam Equalizer Bearing ii i Countenweight — | Casig Stings = '{I Figure 2.1 Production equipment of a well in deep well pumping 2.1.1 Surface equipment for ...

  • Three new Sr-bearing arsenates, hydrothermally synthesized in the system SrO–MO–As2O5–H2O (M2+ = Mg, Cu, Zn)

    Tamara Đorđević, Ljiljana Karanović (2018)
    During systematic research on the mineral-related synthetic arsenates, with particular focus on their structural and spectroscopic classification, three new Sr-containing arsenates Sr2Mg(AsO4)2· 2H2O (1), Sr2Zn4(AsO4)4·H2O (2) and Sr2Cu7(AsO4)6 (3) have been synthesized under low-temperature hydrothermal conditions in the system SrO MO As2O5 H2O (M 2þ = Mg, Zn, Cu). Their crystal structures were determined using room-temperature single-crystal X-ray diffraction data and refined to the following R-values: 1– R1 = 0.025; 2– R1 = 0.030; 3– R1 = 0.035. Compounds ...
    стронцијум, арсен, арсенати, кристална структура, дифракција рендгенских зрака на монокристалима, хидротермална синтеза, Раманска спектроскопија