Претрага
1043 items
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The Importance of Detailed Groundwater Monitoring for Underground Structure in Karst (Case Study: HPP Pirot, Southeastern Serbia)
... when both the tunnel and the hydrogeologic environment were under the influence of the pressure of the transported water (Figure 5). In the full operating mode of the HPP (4–5 h/day), at PP-3 the transport of water relieved the pressure not only in the tunnel but within the hydrogeologic environment as ...
... PP-3 and PP-4, were deep-drilled along the tunnel and the screens installed within the tunnel zone. The HPP has a gravity dam and is usually operated 4–5 h/day. Surface water reservoir is located at an elevation of 612 m, occupies an area of 5.53 km and has a total volume of 170 × 106 m3. č Figure ...
... J1 2+3). However, these changes are also indicative of the hydraulic behavior of the tunnel and the hydrogeologic environment. Water 2019, 11, 603 5 of 10 Δ Figure 3. (a) Comparative plots of groundwater levels in observation wells PP-1 and PP-3, (b) Comparative plots of groundwater levels in ...Marina Čokorilo Ilić, Ana Mladenović, Marina Ćuk, Igor Jemcov. "The Importance of Detailed Groundwater Monitoring for Underground Structure in Karst (Case Study: HPP Pirot, Southeastern Serbia)" in Water, MDPI AG (2019). https://doi.org/10.3390/w11030603
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Uticaj proširenja nuklearne elektrane “Pakš” (Mađarska) na resurse podzemnih voda u Vojvodini
Bojan Hajdin, Dušan Polomčić (2016)... model [3]. U zavisnosti od dužine bunarskog niza, prema rezultatima istraživanja, na obe lokacije moguće je dobiti ukupno do 2 m3/s vode (slika 5). Slika 5 - Bunarski niz na lokacijama Budžak (gore) i Mesarske livade (dole), kod Apatina [3] Prema modelskim ispitivanjima, prihranjivanje izdani, primarno ...
... Uticaj proširenja nuklearne elektrane “Pakš” (Mađarska) na resurse podzemnih voda u Vojvodini | Bojan Hajdin, Dušan Polomčić | Tehnika | 2016 | 66 | 5 10.5937/tehnika1604545H http://dr.rgf.bg.ac.rs/s/repo/item/0003008 Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду омогућава ...
... nakon vađenja iz reaktora ima- ju vrlo visok nivo radioaktivnosti i visoku temperaturu zbog čega se prvo smeštaju u bazen za hlađenje, gde ostaju 3-5 godina, a najviše 10. Nakon toga se pre- meštaju u “privremeno skladište”, gde prema projektu ostaju do završetka rada NE, 2085. godine. Oba skladišta ...Bojan Hajdin, Dušan Polomčić. "Uticaj proširenja nuklearne elektrane “Pakš” (Mađarska) na resurse podzemnih voda u Vojvodini" in Tehnika 66 no. 5, Beograd : Savez inženjera i tehničara (2016): 777-786. https://doi.org/10.5937/tehnika1604545H
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Project BEWARE—Landslide Post-disaster Relief Activities for Local Communities in Serbia
Biljana Abolmasov, Dobrica Damjanović, Miloš Marjanović, Ranka Stanković, Velizar Nikolić, Sandra Nedeljković, Žarko Petrović (2017)... Serbia Project BEWARE—Landslide Post-disaster Relief … 415 landslides were registered during 5 months of field campaigns according to the harmonized landslide event data sheet (Cruden and VanDine 2013) (Fig. 5). As a support to field campaigns Very High Resolution (Pléiades) and High Resolution (SPOT6 ...
... use planning documents of each munic- ipality—SWOT analysis of each municipality for justi- fying landslide hazard, vulnerability and risk analysis 5. Identifying critical sites for landslide rehabilitation 6. Improvement of governmental agencies practice in building/updating national landslide database ...
... software application for tablets and android mobile phones was created for supporting local communities in effective landslide reporting. BEWARE Fig. 5 Harmonized landslide data sheet (in Serbian) 418 B. Abolmasov et al. Fig. 6 Landslides of Krupanj municipality: detail from Pleiades satellite ...Biljana Abolmasov, Dobrica Damjanović, Miloš Marjanović, Ranka Stanković, Velizar Nikolić, Sandra Nedeljković, Žarko Petrović. "Project BEWARE—Landslide Post-disaster Relief Activities for Local Communities in Serbia" in Advancing Culture of Living with Landslides, Proceedings of 4th World Landslide Forum, Ljubljana 29 May-02 June 2017 3, Berlin : Springer Interantional (2017). https://doi.org/10.1007/978-3-319-53487-9_48
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Energetska efikasnost elektromotora na površinskim kopovima
Snežana Aleksandrović, Ilija Jeftenić (2023)Snežana Aleksandrović, Ilija Jeftenić. "Energetska efikasnost elektromotora na površinskim kopovima" in 11. Međunarodna konferencija “Ugalj i kritični materijali" CCM 2023, Zlatibor, 11-14. oktobar 2023. , Beograd : Jugoslovenski komitet za površinsku eksploataciju (2023)
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Допринос одређивању безопасног растојања при извођењу минирања
... IIpomMcaHe Ccy MaKCHMAaJIHE JIO3BOJbEHC Bpe)HOCTH Op3HHe OCHHJOBAaMA TJJa, y 3aBHCHOCTH OJI 3Hauaja H craPba o0jekaTa, 3a (DpeKBeHTHM oubcer om 5 mo 100 Hz. MakcgmainHe J\O3BOJbEHC Op3HHe OCIIHJIOBaMba TJIa IipeMa DIN-4150 nare cy y Ta0enu 1.2. Ta6e:a 1.2. Jlo3BoJbeHe Op3HHe ocriHOBaMba ...
... CTEHCKe Mace 3aXTeBa | „IIpHMMCHy OyuraukO-MHHCPpCKHX pajloBa. MuHcke OyHIOTHHC KOJI CBHX H3BCJUHHX MHHHPaM5a pacnopelbjeHe cy y BHie pe/jloBa (3 — 5) ca Hara6oM OymoruHa o 85 — 90% a TIIpeuHHKOM OJ 89,0 MM. Pacrojabe H3Melby OymroTHHa y pe/ly H3HOCHIO JE 3,5 M , JIOK je pacrojabbe H3Meby pejoBa ...
... 701 | 1,005 | _1,026 | _1,59%| . 38,8102 2. 34,3241 3. 1 32,2057 .J | MM-4 | 463,69 | 2.539,0 | 0O,857 | 2,185 | _2,300 _| _3,286 |__ 33,9891 | 5. 29,4144 ___43,1009 37,8702 35,4358 Ha ocHoBy nojaraka H3 TaGene 3.1, a 3a pemraBabbe jeiHauHHe 3.4 KpeHpaHa je TaOe;ma 3.2. Ta6e:a 3.2. Pejn ...Slobodan Trajković, Sanja Bajić, Ivan Krsmanović. "Допринос одређивању безопасног растојања при извођењу минирања" in ДИТ : Друштво истраживање технологије (2023)
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Преносници снаге на рударским машинама
Предраг Јованчић, Стеван Ђенадић (2023)Предраг Јованчић, Стеван Ђенадић. Преносници снаге на рударским машинама, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2023
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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 ...... Exothermic reactions (at f > 600 "C) are predominantly occurring in UCG process, and the resulting gas mixture can contain 8-20% CO», 5-20% CO, 10-20% H», and 2-5% CHoa. Ifthe gas mixture contains too much CO., and possibly water vapor, the UCG gas (syngas) can Petrović, D. T., et al.: Valorization ...
... Serbian), Pro- ceedings, International Conference EEI 2018., Belgrade, Serbia, 2018, pp. 65-73 5] Greeg, D. W., et. al.. Underground Coal Gasification, 4merican Institute of Chemical Engineers, 24 (1978), 5, pp. 753-781 6| Burton,E. F. Best Practices in Underground Coal Gasification, Lawrence Livermore ...
... 75 75 i 75 H ' · H I Drilling -—Q - and preparing || ' Row5 _ ć____ O—- Boreholes ! Figure 2. Plan view of the grid between boreholes [5] burned textile soaked with petroleum could be used by throwing it into the injection borehole under the pressure of the gasifica- tion agent ...David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić. "Valorization of non-balanced coal reserves in Serbia for underground coal gasification" in Thermal Science (2019). https://doi.org/10.2298/TSCI190725390P
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Merenje i praćenje temperature u cevovodima
Jelena Plećaš (2024)U završnom radu pod naslovom „Merenje i praćenje temperature u cevovodima“ istražuje se značaj merenja temperature u industriji. Opisuje se kako je merenje temperature ključno za efikasno upravljanje procesima i održavanje sigurnosti.Postoje i razvijene su brojne metode merenja temperature, od kojih svaka ima svoju specifičnu primenu, u određenim oblastima. Rad obuhvata pregled razvoja termometrije, različite temperaturne skale, kao i detaljan prikaz instrumenata za merenje temperature. Posebna pažnja posvećena je greškama dodirnih termometara i metodama korekcije.Na kraju,rad se fokusira na ...... manometra od 20 "C i raste za oko 5% od početne greške za svakih 20 *C (zbog razlike u temperaturi rezervoara i kapilare). Uticaj greške se može kompenzovati vezivanjem kompenzacionog manometra sa slepom kapilarom u opoziciju sa manometrom termometra (slika 3.1(b)).5 manomctar rezervoar kapilarna ...
... a a aaaaaaaaaaaoaagagagaaaav av 4 1.1. Termometrija ... anaanaaaaaaaaaeaeaaeaaeaeataeot 4 1.2.Razvoj termometrije..aaa a eaaa a aaaaaeaagatatattt 5 1.3. Temperaturne skale......caaaaaaaaa o aeaaaoaaaaaaaoat 6 2. . MERENJE TEMPERATURE........c. a aaaaaaaaaaaotı & 3. INSTRUMENTI ZA MERENJE T ...
... adanaaaaaaaaatoe 11 3.3.Otporni termometri lıı aaaaaaeaaaaaaaaaaeaaatatoı 13 3.4. Termoelementi ........aaaaaaaaaaaaaa a anaaaaaaoataaeaaegaaatee 16 5. 3.5.Greške dodirnih termometara i metode korekcije 3.5.1. Greška usled odvođenja toplote ... 3.5.2. Greška usled zračenja ...č aanaadnonant 21 ...Jelena Plećaš. Merenje i praćenje temperature u cevovodima, 2024
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Remontni radovi u bušotini sa dubinskom pumpom
Jovana Milošević (2024)Remontni i stimulativni radovi u naftnom inženjerstvu su radovi koji se primenjuju na bušotinama koje su već u proizvodnji ili potencijalno proizvodnim bušotinama, i u zavisnosti od toga imaju različitu svrhu. Remontni radovi predstavljaju sve radove koji su ograničeni na kanal bušotine, dok se stimulativni radovi odnose pribušotinsku zonu.U prvom slučaju remontni i stimulativni radovi kod proizvodnih bušotina služe za otklanjanje problema i povećavanje proizvodnje bušotine. Dok u drugom slučaju, kod potencijalnih bušotina su ovi radovi namenjeni završnim obradama ...... prečnika zrna 40 % i 90 % kumulativnog težinskog udela uzorka. (slika &) __D40s _ D90s 10 • C<3- pesak je uniforman; • 35 - pesak je neuniforman; • C>5 - pesak je vrlo neuniforman. Kumulativni procenat peska 40M040441WHH| 100{(0iTy41 |1 PI0}0410+HH| (0B44190(4|10410 01| 10M ...
... obrada peščara ........aaaaaaaaaaa a aeaeateaeaeaataktaee 19 4.2 Kiselinska obrada karbonata ............c...aaaaaaa da a aaaanaaaaeeiataaactaattı 20 5. REMONTNI RADOVI NA PROIZVONIM BUŠOTINAMA ... 21 6. PROGRAMIRANJE REMONTNIH RADOVA U NAFTNIM I GASNIM BUŠOTINAMA .... 23 7. SLUČAJ BUŠOTINE J... ...
... Granulometrijska analiza dobijenog uzorka; 4. Određivanje optimalne granulacije, vrste gravela za zasip, vrste filtera i veličine zazora filtera; 5. Izbor načina napucavanja i izračunavanje pada pritiska kroz GP sistem; 6. Izbor radnog fluida; 7. Izbor metode čišćenja perforacionih kanala nakon ...Jovana Milošević . Remontni radovi u bušotini sa dubinskom pumpom, 2024
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Procena poroznosti i litologije na osnovu geofizičkih merenja u severoistočnoj Rumuniji
Manja Grifatong (2024)Geofizička karotažna merenja imaju važnu ulogu u određivanju fizičkih i geoloških svojstava delova Zemljine kore. Cilj ovog rada je da se prikaže procena poroznosti i litoloških karakteristika formacije na osnovu rezultata geofizičkih karotažnih merenja. Na osnovu dostupnih podataka izrađeni su dijagrami promene poroznosti sa dubinom i krosplot dijagrami neutronska poroznost – srednja gustina za dve bušotine koje se nalaze na Moldavskoj platformi, u severoistočnoj Rumuniji. Na osnovu ovih dijagrama određene su zone povećane poroznosti i litologija formacija kroz koje ...... [GAPI] — Srednja gustina - DEN [g/cm*"] 24 0 40 80 120 ž 2.8 T T T & T 400 — 400 — 500 — 500 — p E Zona 1 = < - === 5 =l [= Zona 2 > Zona 5 Zona 4 Zona 5 600 — — 600 — (ona 6 -— 700 — 700 — .}' Zona 7 ŠŽ (%; T T T T T T r T T T T 1 T T T 0 20 40 60 80 100 04 0.2 0 Sopstveni ...
... prisutan u formaciji, slika 5, neutronski karotaž pokazuje nerealno niske vrednosti poroznosti, zbog malog sadržaja vodonikovih atoma u gasu. Karakteristično ukrštanje krivih karotaža gustine i neutronskog karotaža u zonama u kojima je prisutan gas, prikazano na slici 5, Javlja se usled izmerenih ...
... poroznost ... aaaaaaaaaaaaaaaaaaaaaaaaaeaaaatatete 12 3. GEOGRAFSKI POLOŽAJ ISTRAŽNOG PODRUČJA ... 15 4. GEOLOŠKA GRAĐA ISTRAŽNOG PODRUČJA a a 17 5. OBRADA I ANALIZA PODATAKA DOBIJENIH GEOFIZIČKIM KAROTAŽNIM MERENJIMA al a aaaaaaaananannnnnnnnnı 20 5.1. Pregled i revizija podataka ..........aaaaaaaa ...Manja Grifatong. Procena poroznosti i litologije na osnovu geofizičkih merenja u severoistočnoj Rumuniji, 2024
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Утицај промене нивоа подземне воде за услове плитког фундирања у крупнозрном тлу
Милана Мичета (2024)Подземне воде представљају изузетно важан природни ресурс, као и важну компоненту система, којим је представљено тло. У складу са тим, приликом пројектовања плитких темеља на крупнозрном тлу, односно приликом анализе граничне носивости и слегања, треба узети у обзир и утицај воде. Верује се да ниво подземне воде значајно смањује носивост тла, док се слегања значајно повећавају. Terzaghi (1943) је први сугерисао да се потапањем масе тла, његова носивост смањује за половину, док се слегање удвостручује. Циљ овог рада је ...... HcrpaxxHe OymroTHHe 5-9 HME H IIpe3HMe: pa3Mepa: ripHnor 0p: MunaHa Muuera, [615/21 1:100 3.1 I eogMxxebepunr ajt Himr TEOJIOHTHIKH IIPOODHJI HCTPA?)KHE 5VIHOTHHE 5-20 JIokanuja: HopBu Cajt - HaceJbe IHIatraj O0jekar: TE Honu Cajt 2 KoopjuHarTe: x)7 411 565.86 y) 5 016 127.65 ZlaryM ...
... acrpaxxkHe OymorTHHe 5-20 HME H IIpe3HMe: pasMepa: ripHmor 0p: MunaHa Muuera, T615/21 1:100 3.2 I eogMxxebepunr ajt Himr TEOJIOLHIKH IIPOODHJI HCTPA)KHE 5YIIOTHHE 5-36 JIokanuja: HopBu Cajt - HaceJbe IHIatraj O0jekar: TE Honu Cajt 2 KoopjuHare: x) 7411 597.03 y)5 016 193.96 z) 76.970 ...
... Al+MI+R1 A2+M2+R2 DA-2 A1+M1+R2 DA-3 (A1* azmm A2*)+M2+R3 IIapruijannu (bakropH curypHocTH 3a HipojeKTHH rpucTyr 3 cy npHkKa3aHH y Ta0emn 5. Ta6ena 5 - Ilapuyujannu akmopu cuzeypaocmu 3a npojekmuau npucmyn 3 IIpojeKkTHu npucryn 3 (A1+M2+R3) (pakropu e(pekra nejcrBa HEHOBOJbHO l.35 CranHo ...Милана Мичета. Утицај промене нивоа подземне воде за услове плитког фундирања у крупнозрном тлу, 2024
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A Mathematical Learning Environment Based on Serbian Language Resources
In recent years, in line with ever growing usage of Information technology, the learning environments are changing. The amount of available learning materials in various forms has increased. These new environments demand comprehensive learning systems, which enable management of the learning corpus with special attention paid to relevant lexical resources. In this paper we present the concept of a Mathematical Learning Environment in Serbian (MLES), which is based on a corpus of mathematical materials and various lexical resources, enabling ...... courses under a Moodle platform [3] [4]. There are several projects reported which are similar to MLES. Three interesting systems are presented in [5],[6]. MMT is a system that includes the theory graphs as the modular representation paradigm for mathematical knowledge. MathHub.info is an archive ...
... mathematical content. One of the most important parts in processing mathematical content is semantic search of mathematical formulae. According to [5], [6] there are several challenges in searching and processing mathematical formulae, the main problem being different notation depending on the ...
... candidates for termbases, their lemmatization and assignment of inflectional classes. There were 2,900 MWE candidates extracted with a frequency over 5, covering 46,000 different forms. An example of a MWE is “diferencijalno-algebarska jednačina” (differential-algebraic equation), represented in ...Radojičić Marija, Obradović Ivan, Stanković Ranka, Utvić Miloć, Kaplar Sebastijan. "A Mathematical Learning Environment Based on Serbian Language Resources" in Proceedings of the 7th International Scientific Conference Technics and Informatics in Education, Faculty of Technical Sciences, Čačak (2018)
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Production of electricity from coal-fired power plants and accompanying CO2 emissions: comparison of EU-27 and US
Even in the third decade of the 21st century, large power plants are still responsible for more than half of the electricity production in Europe and US. They predominantly use fossil fuels in their work, which results in the emission of pollutants into the air, soil and water. In addition to the production of electric energy, fossil fuels, including coal, are used for industrial purposes. Although the use of coal, especially in the countries of the European Union, is ...... G0:-Bo-B5o:BeB: - Q e q RRRR RRRGSKSSSGSGSGS lss Total electricity generation u Flectricity generation from coal —Coal [%] Figure 5. US electricity production [5, 6| 3. CO-» emissions EU-27 has 193 active coal-fired thermal power plants, with 480 thermal units. The total installed capacity ...
... coal-fired power plants of the total installed capacity, and in the EU-27 there are 19.8% of coal-fired power plants of the total installed power [5]. The coal production in EU-27 and US in last three decade is shown in Figure 1. About 495 million tons of coals were consumed in the US, that is around ...
... 1063,0 1000,0 800,0 600,0 —-US MIN: 485,7 400,0 109 MIN: 480,5 200,0 FI IIIR FIFIIFIFFIFSFIEIEIISIIITIIIEI sagašasBssBRBBZBBB8 985889535%5%5855852SSSR geaeaggBggBEgag8B8B88888883BSSSBSSBBBBBaSBS čgBB BBB BB B RRRR RSRRRRRRRSRSSSSSE Figure 1. Coal production in EU-27 and US At one time ...Uroš Djorgovski, Aleksandar Madžarević, Predrag Jovančić. "Production of electricity from coal-fired power plants and accompanying CO2 emissions: comparison of EU-27 and US" in International Conference on Global Energy and Climate Change - ICGRECC-23, New York, 2023, Research Galery- Science Leagues (2023)
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Groundwater gravitational circulation of Karst Veliko Vrelo and Malo Vrelo springs by isotope and the noble gas method: case study of the Beljanica Massif
Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental ChemistryLjiljana Vasić, Laszlo Palcsu, Huang Fen. "Groundwater gravitational circulation of Karst Veliko Vrelo and Malo Vrelo springs by isotope and the noble gas method: case study of the Beljanica Massif" in Environmental Earth Sciences, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s12665-019-8294-0
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Structure, interaction with biomolecules, and cytotoxicity of copper (II) complexes chelating some Schiff base ligands
Aleksandar Mijatović, Angelina Z. Caković, Aleksandar Lolić, Olivera Klisurić, Marko N. Živanović, Dragana S. Šeklić, Snežana Sretenović, Marija Ilić, Jovana Bogojeski (2023)Cancer remains one of the world's deadliest diseases, claiming many lives each day. Transition metal complexes are leading candidates in developing anticancer agens with cisplatin used in chemotherapy worldwide. Copper, an endogenous metal in the human body, is especially attractive because of its typical redox biological activities and a relatively strong affinity to nucleobases. A series of Cu(II) complexes with ethane-1,2-diamine as the amine part and pentane-2,4-dione and/or 1-phenylbutane-1,3-dione, pentane-2,4-dione and/or 1,1,1- trifluoropentane-2,4-dione, or 1,1,1-trifluoropentane-2,4-dione and/or 1-phenylbutane-1,3-dione as the ...Aleksandar Mijatović, Angelina Z. Caković, Aleksandar Lolić, Olivera Klisurić, Marko N. Živanović, Dragana S. Šeklić, Snežana Sretenović, Marija Ilić, Jovana Bogojeski. "Structure, interaction with biomolecules, and cytotoxicity of copper (II) complexes chelating some Schiff base ligands" in Applied Organometallic Chemistry, Wiley (2023). https://doi.org/10.1002/aoc.7253
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Synthesis, magnetic, thermal and structural properties of Co(II), Ni(II) and Cu(II) complexes containing isophthalato ligands
A series of novel ternary Co(II), Ni(II) and Cu(II) complexes containing 2,20-dipyridylamine (dipya), 2,20-bipyridine (bipy), and 1,10-phenanthroline (phen), as aromatic diamine ligands, and dianion of isophthalic acid (ipht) have been prepared by ligand exchange reactions from diluted H2O/EtOH solutions. The complexes were characterized by elemental analysis, IR spectroscopy, magnetic susceptibility measurements and TG and DSC analysis. Three complexes, Cu(dipya)(ipht)H2O (1), Co(dipya)(ipht)2H2O (2) and Cu(ipht)(phen)2H2O (5) are polymeric with bis-monodentate ipht, while the other two complexes M(bipy)(ipht)4H2O, M@Co(II) (3) and ...комплекси прелазних метала, карбоксилатни лиганди, N-лиганди, кристална структура, магнетна својстваJelena Rogan, Dejan Poleti, Ljiljana Karanović, Zvonko Jagličić. "Synthesis, magnetic, thermal and structural properties of Co(II), Ni(II) and Cu(II) complexes containing isophthalato ligands" in Journal of Molecular Structure, Elsevier BV (2011). https://doi.org/10.1016/j.molstruc.2010.11.024
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Компарација метода XRF i ICP-MS на узорцима угља и продуктима сагоревања
Бранко Костић, Ксенија Ераковић, Дејан Прелевић, Сабина Ковач, Драгана Животић. "Компарација метода XRF i ICP-MS на узорцима угља и продуктима сагоревања" in Записници Српског геолошког друштва (2023)
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Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources
Large collections of textual documents represent an example of big data that requires the solution of three basic problems: the representation of documents, the representation of information needs and the matching of the two representations. This paper outlines the introduction of document indexing as a possible solution to document representation. Documents within a large textual database developed for geological projects in the Republic of Serbia for many years were indexed using methods developed within digital humanities: bag-of-words and named ...... the relevance of retrieved documents after the search has been com- pleted.5 Figure 5 depicts the evaluation panel: when the query and the search Fig. 5. The web panel for evaluation of retrieved documents by different methods. 5 Available at http://geoliss.mre.gov.rs/fodibevaluacija/. A u t h o r ...
... ∆(k) is the change in the recall from item k − 1 to item k. The comparison of all applied methods for 5 queries for which the initial method achieved better results is given in Fig. 8 (Table 4).AQ3 Table 5 depicts a set of queries in which a moderate improvement has been achieved in comparison to the initial ...
... P r o o f 20 R. Stanković et al. Fig. 9. Comparison of all indexing methods for queries in Table 5. Fig. 10. Comparison of all indexing methods for queries in Table 7. results (e.g. first 5, 10, 20, etc.) is also often taken into account, as users often look only at the certain number of best ...Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović. "Improving Document Retrieval in Large Domain Specific Textual Databases Using Lexical Resources" in Trans. Computational Collective Intelligence - Lecture Notes in Computer Science 26, Springer (2017). https://doi.org/10.1007/978-3-319-59268-8_8
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Testing the energy value of different types of coal by the method of active thermography
In this paper, coal thermograms are presented and analyzed in order to determine their energy value. Two types of coal of different categories, brown and lignite, were selected for active thermographic imaging. The tested coal samples were processed before measurement so that they are similar in dimensions and have two plane-parallel smooth surfaces. The test samples were "primarily" heated under the same conditions and the process of their cooling was monitored by a thermal camera. "Then" they were cooled ...Stevan Đenadić, Ljubiša Tomić, Vesna Damnjanović, Predrag Jovančić, Dragutin Jovković. "Testing the energy value of different types of coal by the method of active thermography" in 9th International Scientific Conference on Defensive Technologies, Belgrade, Serbia, 15-16 October 2020, The Military Technical Institute (2020)
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On the distribution modulo 1 of the sum of powers of a Salem number
Dragan Stankov (2016)It is well known that the sequence of powers of a Salem number θ, modulo 1, is dense in the unit interval, but is not uniformly distributed. Generalizing a result of Dupain, we determine, explicitly, the repartition function of the sequence , where P is a polynomial with integer coefficients and θ is quartic. Also, we consider some examples to illustrate the method of determination.Algebraic integer, the house of algebraic integer, maximal modulus, reciprocal polynomial, primitive polynomial, Schinzel-Zassenhaus conjecture, Mahler measure, method of least squares, cyclotomic polynomialsDragan Stankov. "On the distribution modulo 1 of the sum of powers of a Salem number" in Comptes rendus Mathematique (2016). https://doi.org/10.1016/j.crma.2016.03.012