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Упит dcterms_subject_txt:expert system

703 items

  • 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
    ... / Nip ,s Znp,s Fe)Oa samples. Table 1. The phase composition of prepared composites. In parenthesis next to the phase chemical formulae crystal system and space group are presented as well as corresponding, PDF card numbers from the ICDD database. Phase abundances are calculated by the RIR method ...
    ... with a cold head and capacitor cell mounted on it. Pfeiffer vacuum turbo molec- ular pump maintained 104 mbar pressure. CTI Cryogenics refrigerating system model 22 mounted on the cold head was applied to a lower temperature to 150 K. Lakeshore 340 temperature controller with hater attached at the ...
    ... K. Ferroelectric and leakage current measurements were conducted in the electrical field range of 5-40 kV/cm on the Precision Multiferroic Test System with High Voltage Interface (Radiant Technologies, Inc., Albuquerque, New Mexico). 4. Conclusions The aim of this study was the investigation ...

  • Proširivanje upita zasnovano na leksičkim resursima

    Ranka Stanković, Ivan Obradović, Cvetana Krstev (2009)
    U radu je opisano kako se leksički resursi za srpski jezik i softverski alati, razvijeni u okviru Grupe za jezičke tehnologije Univerziteta u Beogradu, mogu koristiti za unapređenje postavljanja upita. Rezultati pretrage mogu biti značajno unapređeni korišćenjem različitih leksičkih resursa, kakvi su morfološki rečnici i semantičke mreže. Izloženi pristup može se iskoristiti i u Sistemu naučnih, tehnoloških i poslovnih informacija, jer je efikasno pretraživanje ovog dragocenog resursa, imajući u vidu njegovu heterogenost i obim, kao i preovladavajući tekstualni sadržaj, ...
    ... improved by using various lexical resources, such as morphological dictionaries and semantic networks. The outlined approach may be used within the System of scientific, technical and business information. Efficient exploration of such a valuable source, in view of the diversity and amount of archived ...

  • Eksploatacioni učinci ugljenih sistema na površinskom kopu Tamnava–Zapadno polje

    Marko Lazić, Filip Miletić, Milena Lekić, Veljko Rupar, Željko Petrović, Lazar Žujović (2021)
    U radu su analizirani eksploatacioni učinci ugljenih sistema na površinskom kopu Tamnava–Zapadno polje. Period analize je prvih šest meseci tekuće godine. Analiza je vršena sa aspekta ostvarene proizvodnje, kvaliteta uglja, efektivnog vremena rada, kapacitetnog i vremenskog iskoršćenja i zastoja sistema. Za poređenje podataka različitih parametara koji po svojoj prirodi nisu međusobno uporedivi, u radu su korišćene metode višekriterijumskog odlučivanja.
    proizvodnja uglja, zastoji, metode višekriterijumskog odlučivanja
    ... in mining and mineral processing: Applications and trends. Expert [8] Bazzazi, A. A., Osanloo, M., & Karimi, B. (2011). Deriving preference order of open pit mines equipment through MADM methods: Application of modified VIKOR method. Expert Systems with Applications, 38(3), 2550-2556;Systems with Ap ...
    ... current year. The analysis was performed in the aspect of reached production, coal quality, effective working time, capacity and time utilization and system stoppage using multicriteria decision–making methods. Ključne reči: proizvodnja uglja, zastoji, metode višekriterijumskog odlučivanja Keywords: coal ...

  • XRD dertermination od hydrothermal phases related to epithermal mineralization in the Čukaru Peki deposit

    Dragana Bosić, Vladica Cvetković, Miodrag Banješević, Kristina Šarić (2024)
    Čukaru Peki, epithermal mineralization, hydrothermal alterations

  • Savremene tendencije upravljanja mineralnim resursima u svetu i stanje u Republici Srbiji

    Dragan Ignjatović, Vladimir Pavlović (2024)
    Strategija upravljanja mineralnim i drugim geološkim resursima na održivim i holističkim osnovama, služi kao osnova za vladinu politiku vezanu za geološka istraživanja i eksploataciju mineralnih resursa u skladu sa njenim pravnim i regulativnim obavezama. Uspostavljanje Strategije obezbeđuje osnovu za dalji razvoj i ona se realizuje u relevantnim oblastima politike kako bi se postigli postavljeni ciljevi, pri čemu se resursi moraju dobijati i koristiti na održiv način. Strategija treba transparentno da istakne mogućnosti i izazove, stvori preduslove, razjasni uloge i ...
    strategija upravljanja, mineralni resursi, rezerve, rudarstvo, geologija.
    ... /ENERGY/GE.3/2022/5), Komitet za održivu energiju (cngl. Commiftete on Sustainabile Energy) i ekspertska grupa za upravljanje resursima (engl. Expert Group on Resource Management) su u aprilu 2022. publikovale nacrt preporuka za upravljanje mineralnim resursima. Za utvrđivanje politike održivog ...
    ... Commission for Europe) je objavila detaljne principe i uspostavila Sistem za upravljanje mineralnim resursima UNRMS (United Nafions Resource Management System, 2022.) [5]. On je zasnovan na Okviru za klasifikaciju resursa Ujedinjenih nacija (engl. 7he United Nations Framework Classification for Resources ...
    ... https://www.irena.org/Publications/2023/Jul/Geopolitics-of-the-Energy- Transition-Critical-Materials [5] Draft United Nation Resource Management System: Principles and Requiremens. (2022). United Nation, Economics and Social Council. Geneva. 116 ...

  • Numerical modelling of the roughly simultaneous emplacement of two distinct ophiolite belts

    Nikola Stanković, Vesna Cvetkov, Vladica Cvetković (2024)

  • Actual contamination of the Danube and Sava rivers at Belgrade (2013)

    Milan Antonijević, Marija Arsović, Josef Cáslavský, Vesna Cvetković, Predrag Dabić, Mladen Franko, Gordana Ilić, Milena Ivanovic, Nevena Ivanović, Milica Kosovac, Dragana Medić, Slobodan Najdanović, Milica Nikolić, Jovana Novaković, Tatjana Radovanović, Djurdjina Ranić, Bojan Šajatović, Gorica Špijunović, Ivana Stankov, Jelena Tošović, Polonca Trebse, Olivera Vasiljević, Jan Schwarzbauer (2014)
    rečni sistemi, stanje zagađenja, organski zagađivači, teški metali, skrining analize, non-target screening
    ... The overall goal of this case study was to illustrate how complex and com- plementary can be a more comprehensive analytical view on an aquatic system. To the best of our knowledge this approach has been ignored as far as possible in environmental geochemical studies in the Danube Basin catchment ...
    ... filtered using LUT Syringe Filters PTFE, 13 mm, 0.45 μm and transferred to low-volume autosampler vials. HPLC–ESI-MS analyses. An Agilent 1100 HPLC system with an Agilent 6320 spherical ion trap mass spectrometer and electrospray ionization was used. The hormones were sepa- rated on a Phenomenex Kinetex ...
    ... 1175 Ecotoxicological tests The ecotoxicity of samples was assessed using liquid-dried luminescent bacteria Vibrio fischeri NRRL B-11177 with system LUMIStox, Dr. Lange. The toxicity endpoint was deter- mined as the reduced luminescence emission after incubation in the presence of selected chemicals ...

  • 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
    ... mekih stenskih masa koriste se modifikovane verzije već postojećih klasifikacionih sistema. Jedan od primera modifikacije je Weak Rock Mass Rating System (W- RMR). Dobijen je korelacijom RMR i Unified Soil Classification Sistem (USCS) klasifikacionih sistema. Detaljnija obrada ove modifikacije biće ...
    ... sistema zaista može prevazići probleme koji se javljaju u mekim stenama. Modifikacijom RMR sistema dobijen je sistem pod nazivom Weak Rock Mass Rating System (W-RMR). Ovaj modifikovani klasifikacioni sistem predstavljen je od strane Warren-a (2016) i Warren-a and Kallu-a (2016). Autori smatraju da ovaj ...
    ... predložili da se prilikom klasifikacije ovih stenskih masa koriste modifikovani klasifikacioni sistemi. Jedan od njih je Weak Rock Mass Rating System (W-RMR). W-RMR sistem predstavlja modifikaciju RMR sistema i njegovo korelisanje sa USCS klasifikacijom kod tla. Na taj način se dobio jedinstven ...

  • Mogućnost korišćenјa toplotnih pumpi sa otpadnom toplotom iz postrojenјa za prečišćavanјe otpadnih voda kao toplotnim izvorom

    Dejan Ivezić, Marija Živković, Aleksandar Madžarević, Boban Pavlović (2021)
    U narednom periodu se planira izgradnja nekoliko desetina sistema za prečišćavanje otpadnih voda u većim gradovima u Srbiji. Iskustva iz postrojenja koja su trenutno u radu, pokazuju da bi prečišćena otpadna voda, s obzirom na protok i temperaturu, mogla da predstavlja značajan izvor obnovljive energije. U radu su prikazani primeri dobre prakse korišćenja ove energije u sistemima daljinskog grejanja u zemljama Evropske unije. Analiziran je rad postrojenja za prečišćavanje otpadnih voda u Šapcu i razmotrena je mogućnost njegovog korišćenja ...
    toplotna pumpa, sistem daljinskog grejanja, postrojenje za prečišćavanje otpadnih voda
    ... countries. The operation of the wastewater treatment plant in the city of Šabac was analysed and the possibility of its use in the local district heating system was considered. Index terms - heat pump, district heating systems, wastewater treatment plant I UVOD oplotna pumpa je uređaj je uređaj koji ...

  • Application of Expansive Mortars for the Formation of Artificial Screens During Blasting in Urban Areas

    Milanka Negovanović, Lazar Kričak, Stefan Milanović, Nikola Simić, Jelena Majstorović (2024)
    During construction of buildings in urban areas, sometimes there is a need to blast solid rock mass in the immediate vicinity of the surrounding buildings. In that case, the aim is not only to increase the efficiency of blasting, but also to reduce harmful effects of ground vibration induced by blasting. At the same time, it is very important to protect the buildings located in the safe zone from the blast site as well as remaining rock mass around ...
    expansive mortar, artificial screens, pressure, rock breaking, building foundation

  • Numerical modelling of a single intra-oceanic subduction for the origin of the Balkan ophiolites

    Nikola Stanković, Vesna Cvetkov, Vladica Cvetković (2024)

  • Photocatalytic Activity of the V2O5 Catalyst toward Selected Pharmaceuticals and Their Mixture: Influence of the Molecular Structure on the Efficiency of the Process

    Sanja J. Armaković, Aleksandra Jovanoski Kostić, Andrijana Bilić, Maria M. Savanović, Nataša Tomić, Aleksandar Kremenović, Maja Šćepanović, Mirjana Grujić-Brojčin, Jovana Ćirković, Stevan Armaković (2023)
    Due to the inability of conventional wastewater treatment procedures to remove organic pharmaceutical pollutants, active pharmaceutical components remain in wastewater and even reach tap water. In terms of pharmaceutical pollutants, the scientific community focuses on -blockers due to their extensive (over)usage and moderately high solubility. In this study, the photocatalytic activity of V2O5 was investigated through the degradation of nadolol (NAD), pindolol (PIN), metoprolol (MET), and their mixture under ultraviolet (UV) irradiation in water. For the preparation of V2O5, facile ...
    DFT analysis, metoprolol, nadolol, nanomaterial characterization, photocatalysis, pindolol, β-blocker
    ... E. Software update: The ORCA program system—Version 5.0. WIREs Comput. Mol. Sci. 2022, 12, e1606. [CrossRef] Neese, F. Software update: The ORCA program system, version 4.0. WIREs Comput. Mol. Sci. 2018, 8, e1327. [CrossRef] Neese, E. The ORCA program system. WIREs Comput. Mol. Sci. 2012, 2, 73-78 ...
    ... dye. J. Catal. 2014, 2014, 370696. Saravanan, R.; Gupta, V.; Mosquera, E.; Gracia, E. Preparation and characterization of V)Os /ZnO nanocomposite system for photocatalytic application. J. Mol. Liqg. 2014, 198, 400—412. [CrossRef] Rasheed, R.; Mansoor, H.; Abdullah, T.; Juzsakova, T.; Al-Jammal, ...
    ... quantum chemistry program package. J. Chem. Phys. 2020, 152, 224108. [CrossRef] [PubMed] Neese, E. The SHARK integral generation and digestion system. J. Comput. Chem. 2022, 44, 381-396. [CrossRef] Armaković, S.; Armaković, S. Atomistica.online—Web application for generating, input files for ORCA ...

  • Tectonic evolution of the Circum-Moesian orocline of the Carpatho-Balkanides: Paleomagnetic constraints

    Emő Márton, Vesna Cvetkov, Miodrag Banješević, Gábor Imre, Aleksandar Pačevski (2024)
    Apuseni-Banat-Timok-Srednogorie belt, danubicum, paleomagnetism, oroclinal bending

  • Sastav i teksture minerala FeO-Fe2O3-TiO2 sistema u vulkanskim stenama i porfirskim ležištima bakra Borske metalogenetske zone

    Aleksandar Luković (2021)
    Proces obrazovanja minerala iz sistema FeO-Fe2O3-TiO2 u uzorcima vulkanskih stena i porfirskih orudnjenja borske zone prikazan kroz pojavu magnetita/hematita i njihovih alteracija. Minerali ove zone su ispitivani optičkim metodama (odbijena i propuštena svetlost), SEM-EDS/BSD, XRPD, LA-ICP-MS metodama. Rezultati ispitivanja su, pored glavnih Fe – Ti oksida, otkrili prisustvo ferijskog ilmenita u hornblenda andezitima I vulkanske faze kao i magnetita sa većim koncetracija Cr u zoni zlotske magnetne anomalije. Ispitivanje uzoraka iz bušotina porfirskih sistema borske zone otkriva postojanje nekoliko ...
    magnetit, hematit, hemoilmenit, Borska metalogenetska zona, porfirska ležišta
    ... ABSTRACT Composition and textures of the minerals of FeO-Fe2O3-TiO2 system in volcanic rocks and porphyry copper deposits of the Bor metallogenic zone The process of formation of mineral system FeO-Fe2O3-TiO2 in samples from volcanic rocks and porphyry deposits of Bor zone is explained ...
    ... of Zlot magnetic anomaly. Examination of samples from porphyry system drill holes of Bor zone reveals different types of (under hydrothermal condition) magnetite/hematite in different porphyry alteration zone. Magnetite of this system is presented as type I in paragenesis with bornite i chalcopyrite ...
    ... Analytical Silicon Drift Detector povezanim sa INCAEnergy 350 Microanalysis System; 2) talasno-disperzivnim spektrometrom (WDS – wavelength-dispersive spectrometer) iste firme Oxford Instruments, model INCA WAVE500 system. U prethodnom procesu pripreme, preparati su napareni slojem ugljenika debljine ...

  • Modeliranje sistema upravljanja zaštitom životne sredine u rudarsko-energetskim kompleksima

    Jelena R. Malenović - Nikolić (2016-07-12)
    Efikasnost funkcionisanja sistema upravljanja zaštitom životne sredine u rudarskoenergetskimkompleksima zavisi od stepena sprovođenja usvojene politike zaštiteživotne sredine i primene preventivnih mera zaštite životne sredine. Nedostatakfinansijskih sredstava za unapređivanje tehnologije eksploatacije, transporta, pripreme iprerade energetskih mineralnih sirovina u našim rudarsko-energetskim kompleksima,negativno utiče na ostvarivanje ciljeva zaštite životne sredine, a posledice radnihaktivnosti rudarsko-energetskih kompleksa dovode do smanjenja nivoa kvalitetavazduha, vode i zemljišta...
    rudarsko-energetski kompleks, životna sredina, sistem upravljanja,višekriterijumsko odlučivanje, modeliranje
    ... Process, Marmara Üniversitesi İİBF Dergisi 25 (2), 2008, pp. 677 – 691 139. Huang, H.C., Designing a Knowledge-Based System for Strategic Planning: A Balanced Scorecard Perspective, Expert Systems with Applications 36 (1), 2009, pp. 209-218 140. Leung, C., Lam, K.C., Cao, D., Implementing The Balanced ...
    ... I., Chen, W.C., Chang, C.J., A fuzzy AHP and BSC Approach for Evaluating Performance of IT Department in the Manufacturing Industry in Taiwan, Expert Systems with Applications 34, 2008, pp. 96-107 187 136. Varma, S., Wadhwa, S., Deshmukh, S.G., Evaluating Petroleum Supply Chain Performance: ...
    ... 876:502/504(043.3) 502.175:622:620.9(043.3) Environmental Management System Modelling in Mining and Energy Complexes Summary Efficient functioning of an environmental management system (EMS) in mining and energy complexes depends on the degree of implementation of adopted ...

  • Substitution reactions of some novel sterically hindered monofunctional Pd(II) complexes

    Aleksandar Mijatović, Jovana Bogojeski, Biljana Petrović, Živadin D. Bugarčić (2011)
    Reakcije supstitucije monofunkcionalnih kompleksa [(TLtBu)PdCl]+ i [Pd(tpdm)Cl]+, gde je TLtBu = 2,6-bis[(1,3-di-terc-butilimidazolin-2-imino)metil]piridin i tpdm = terpiridindimetan, sa nukleofilima kao što su: tiourea, I−, Br−, NO2−, piridin i dimetil-sulfoksid (DMSO) proučavani su u 0,1 M vodenom rastvoru NaClO4 u prisustvu 10 mM NaCl. Reakcije su sprovedene na tri različite temperature (288, 298 i 308 K) korišćenjem tehnike zaustavljenog protoka na različitim temperaturama. Reakcije supstitucije su praćene pod uslovima pseudo prvog reda sa velikim viškom nukleofila. Dobijeni rezultati pokazuju da kompleks ...
    Materials Chemistry, Inorganic Chemistry, Physical and Theoretical Chemistry
    ... Suprasil cells. Kinetic measurements were performed on an Applied Photophys- ics SX.18 stopped-flow instrument coupled to an online data acqui- sition system. The temperature was controlled throughout all kinetic experiments to ±0.1 K. 2.3. Kinetic measurements The substitution reactionsof the [(TLtBu)PdCl]+ ...
    ... Suprasil cells. Kinetic measurements were performed on an Applied Photophys- ics SX.18 stopped-flow instrument coupled to an online data acqui- sition system. The temperature was controlled throughout all kinetic experiments to +0.1 K. 2.3. Kinetic measurements The substitution reactions of the [(TL")PdCl]* ...
    ... The studied [Pd(tpdm)Cl]+ complex also includes pyridine rings, but in the tridentate tpdm ligand they are separated by methylene groups, so the system is more flexible in comparison with terpyri- dine. This is confirmed by the crystal structure of the [Pd(tpdm)Cl]+ complex [24]. Observed results ...

  • 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
    ... collection Chemical formula K3EuSi2O7 Diffractometer Gemini S (Oxford Diffraction) Mr 437.44 Absorption correction Analytical + Empirical Crystal system Hexagonal Measured reflections 10007 Space group P63/mcm Independent reflections 528 Temperature, K 298 Observed [I> 2σ(I)] reflections 392 a ...
    ... Carolina Academy of Science 12 (2014) 200 (https://scholarcommons.sc.edu/jscas/vol12/iss1/1) 17. Rigaku Oxford Diffraction, CrysAlisPro Software system, Rigaku Corporation, Oxford, 2018 18. Rigaku. PDXL 2: Integrated powder X-ray diffraction software. Version 2.8.3.0. Rigaku Corporation, Tokyo ...

  • Primjena magnetometrijskih ispitivanja na arheološkom lokalitetu Nedeljkova humka

    Mirko Petković, Vesna Cvetkov, Milorad Ignjatović, Dejan Naumov (2020)
    ... t h - 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 ...

  • Is the Sava-Vardar zone a remnant of an Upper Cretaceous ocen? Pro et contra

    Vladica Cvetković, Dejan Prelević, Ana Mladenović (2024)
    Neotethys, ocean closure, subduction
    ... Bemoull, D., Figenschuh, B., Matenco, L., Schefer, S., Schuster, R., ... & Ustaszewski, K. (2008). The Alpine-Carpathian-Dinaridic orogenic system: correlation and evolution of tectonic units. Swiss Journal of Geosciences, 101, 139-183. 3. Prelević, D., Wehrheim, S., Reutter, M., Romer, ...

  • 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
    ... tmosphere-ionosphere system Aleksandra B. Kolarski Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera;Electromagnetical coupling in lithosphere-atmosphere- ionosphere system | Aleksandra B. Kolarski ...
    ... S., Meyer, J., Holzworth, R., Macgorman, D. (2008). Transient Luminous Events and the 9 May 2007 Oklahoma Mesoscale Convective System. NASA Astrophysics Data System (ADS). http://www.sciencedirect.com/science/article/pii/S136468260400118X http://www.sciencedirect.com/science/article/pii/S13646 ...
    ... FACULTY OF MINING AND GEOLOGY Aleksandra B. Kolarski ELECTROMAGNETICAL COUPLING IN LITHOSPHERE-ATMOSPHERE- IONOSPHERE SYSTEM Doctoral Dissertation Belgrade, 2016 Mentori: 1. dr Boban Marinković, vanredni profesor uža naučna oblast: ...