Претрага
490 items
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Long-term planning methodology for improving wood biomass utilization
The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković. "Long-term planning methodology for improving wood biomass utilization" in Energy, Elsevier BV (2019). https://doi.org/10.1016/j.energy.2019.03.105
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Просторни положај лежишта угља Ђурђевик: геофизичко-геолошки модел
Синиша Арсеновић (2019)Лежиште угља Ђурђевик представља источни део Бановићког угљеног басена и припада северној страни босанске офиолитске зоне унутрашњих Динарида у чији састав улазе стене палеозојске, мезозојске и кенозојске старости. Језерска доњомиоценска угљоносна серија изграђена је од лапоровито-глиновитих седимената са једним слојем мрког угља. Дебљина угљеног слоја креће се у интервалу од 5 до 25 m са генералним правцем пружања СЗ - ЈИ и падом према ЈЗ. У зони обухваћеноj геофизичким истраживањима изражена je пострудна тектоника у виду раседа мањег и ...... јами Ђурђевик II се креће од 5 - 25 m, просечно 18 m, са генералним правцем пружања северозапад - југоисток и падом према југозападу. Док је у северном делу Ђурђевичког басена залегање плитко (подручје копова) идући према југу је дубље (подручје јама) па се и нова јама Ђурђевик II планира у дубљим ...
... Са Локалитета Будућег Површинског Копа “‘Вишћа II’” и Прорачун Радних и Завршних Косина. РО РУДАРСКО ГЕОЛОШКИ ИНСТИТУТ И ФАКУЛТЕТ, Tузла Стевић, М., 1988. Геомеханички Извјештај о Стабилности Косина у 1988. Години На Површинском Копу “‘Вишћа II’” у Ђурђевику. РО РУДАРСКО ГЕОЛОШКИ ИНСТИТУТ И ...
... и 2.3). 2.3.1. Палеозоик Најстарије стене и палеорељеф басена у северном, западном и јужном ободу Ђурђевичког басена изграђују амфиболити и комплекс ултрабазично- перидотитских стена, вероватно палеозојске (PZ) старости. Положај који данас заузимају резултат је интензивног издизања, нарочито ...Синиша Арсеновић. Просторни положај лежишта угља Ђурђевик: геофизичко-геолошки модел, Београд : Рударско-геолошки факултет, 2019
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Određivanje sadržaja kiselih funkcionalnih grupa na površini biougljeva primenom Boehm-ovih titracija
Aleksandar D. Krstić, Aleksandar Đ. Lolić, Marija A. Ilić, Aleksandar M. Mijatović, Snežana J. Zlatanović, Zoran P. Nedić, Vesna M. Pavelkić (2015)Biougalj se dobija pirolizom iz organskog otpada. Smatra se ,,modifikatorom'' zemljišta i koristi se kao đubrivo i kao rezervoar za skladištenje ugljenika. Kvantifikacija funkcionalih grupa je važna zbog hemijske reaktivnosti biougljeva koji imaju uticaj na svojstva zemljišta. U istraživanju su korišćena 3 uzorka biouglja različitog porekla i jedan referentni, aktivni ugalj. Sadržaj kiselih funkcionalnih grupa je određivan titracijom po Boehm-u na dva načina: uvođenje N2 tokom titracije i tretman sa BaCl2. Optimizovan je način pripreme tri Boehm ova rastvora ...... duzini 250 nm. Determination of oxygen surface groups on biochars using Boehm-titration method Aleksandar D. Krstié, Aleksandar D. Lolié, Marija A. Ii, Aleksandar M, Mijatovic’, ‘SneZana J. Zlatanovi¢, Zoran P. Nedié™, Vesna M. Pavelki¢™” Faculty of Chemistry, University of Belgrade, Studentski trg ...Aleksandar D. Krstić, Aleksandar Đ. Lolić, Marija A. Ilić, Aleksandar M. Mijatović, Snežana J. Zlatanović, Zoran P. Nedić, Vesna M. Pavelkić. "Određivanje sadržaja kiselih funkcionalnih grupa na površini biougljeva primenom Boehm-ovih titracija" in 52. savetovanja Srpskog hemijskog društva, Srpsko hemijsko društvo (2015)
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‘Blue-’ and ‘Brown-speckled’ pottery from Qalhât, the Sultanate of Oman (13–16th centuries): Comparison with traditional Omani 19–20 century productions
Representative ‘Blue speckled’ (13–16th centuries) and ‘Brown speckled’ (13–21st century) wares recovered from the excavations in Qalhât or collected around Bahlâ city (Sultanate of Oman) were characterized by XRPD, SEM-EDS, Raman/optical microspectroscopy, and thermal expansion. Minerals present in the body (quartz, augite and albite as major phases, calcite, dolomite, rutile, anatase, phosphate, hematite and magnetite as minor phases) were identified by XRPD and/or Raman spectroscopy. SEM-EDXS microanalysis was performed on the glazes in order to compare their composition, especially ...Liliana Gianni, Hélène Renel, Aleksandar Kremenović, Philippe Colomban. "‘Blue-’ and ‘Brown-speckled’ pottery from Qalhât, the Sultanate of Oman (13–16th centuries): Comparison with traditional Omani 19–20 century productions" in Boletín de la Sociedad Española de Cerámica y Vidrio, Elsevier BV (2020). https://doi.org/10.1016/j.bsecv.2020.06.005
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Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation
kontinentalna tektonika: kompresija, kontinentalna tektonika: ekstenzija, kontinentalna tektonika: transkurentni i transformni rasedi, pukotine, rasedi, zone snažnih deformacija, kinematika deformacija kore i omotača, teorijska mehanika, modelovanje... coordinate system, which may be arbitrarily oriented compared to the deformation, but along the principal axes n: V = 2 ∑ i λi ni ⊗ ni , (31) where the dyadic product ni ⊗ ni changes the basis, by rotating the reference coordinate system to the directions of the principal axes n. Any second order tensor ...
... stretch is related to Hencky strain, which from the viewpoint of the deformed configuration, is defined as (Xiao et al. 1997): lnV = 2 ∑ i=1 (lnλi )ni ⊗ ni (46) D o w n lo a d e d fro m h ttp s ://a c a d e m ic .o u p .c o m /g ji/a rtic le /2 2 6 /2 /9 8 4 /6 1 9 5 5 2 9 b y g u e ...
... dno‘olwWepedse//:sdyy Wo. pepeojumMoq Mapping and classifying large deformation 997 with principal stretches λi and the respective eigenvectors ni of V, see also eq. (31). In case of uniaxial extension or shortening, the finite stretch for a constant displacement gradient, or a constant incremental ...Taco Broerse, Nemanja Krstekanić, Cor Kasbergen, Ernst Willingshofer. "Mapping and classifying large deformation from digital imagery: application to analogue models of lithosphere deformation" in Geophysical Journal International, Oxford University Press (OUP) (2021). https://doi.org/10.1093/gji/ggab120
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Influence of Initial Treatment on the Survival and Recurrence in Patients With Differentiated Thyroid Microcarcinoma
... Total 121 100.0 Total 121 100.0 Initial TNM staging Revised TNM Staging at the End of Follow-up Period Stage n % Stage n % I 106 87.6 I 104 86.0 II 1 0.8 II 2 1.6 III 10 8.3 III 10 8.3 IVa 3 2.5 IVa 2 1.6 IVc 1 0.8 IVc 3 2.5 Total 121 100.0 Total 121 100.0 Patients’ categorization was done according ...
... - - - patients without recurrence, patients with recurrence ___. C, Influence of clinical stage on DSS. ____ patients staged I; _ _ _patients staged II; __ _ patients staged III; - - - - - patients staged IV. D, Influence of patients’ age on DSS; ___ _ patients younger than 45 years; ____ patients older ...
... incidental multifocal PTM.1 The recent ATA guidelines recommend postoperative RAI therapy for all patients with stage III and IV disease, as well as stage II patients older than 45 years. This guideline also states that RAI ablation is indicated in selected patients with stage I disease, espe- cially if there ...Jasna Mihailović, Ljubomir Stefanović, Ranka Stanković. "Influence of Initial Treatment on the Survival and Recurrence in Patients With Differentiated Thyroid Microcarcinoma" in Clinical Nuclear Medicine, Lippincott Williams & Wilkins (2013). https://doi.org/10.1097/RLU.0b013e3182872ed2
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Definition of groundwater genesis and circulation conditions of the complex hydrogeological karst system Mlava–Belosavac–Belosavac-2 (eastern Serbia)
Ljiljana Vasić, Saša Milanović, Zoran Stevanović, Laszlo Palcsu. "Definition of groundwater genesis and circulation conditions of the complex hydrogeological karst system Mlava–Belosavac–Belosavac-2 (eastern Serbia)" in Carbonates and Evaporites, Springer Science and Business Media LLC (2020). https://doi.org/10.1007/s13146-020-00550-3
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The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers
One of the most important prerequisites for the successful operation of the open-cast lignite mine is to carry out all the auxiliary works timely with the necessary quality. The most important and most commonly used auxiliary machines are bulldozers. Engaging time of bulldozers use is in direct relation with the coefficients of the time and capacity utilization of the continuous system for the excavation of coal and tailings, which indicates their importance. More than 100 bulldozers have been hired ...... can achieve, higher consumption of fuel and spare parts and more stoppages (failures) (Figure 1). 286 3000 | [mh] /_—\_/—\ | 2500 - ИИ иИ 2000 - / es / —о— Аџегаве геа!7еа moto hours — — Ауегаве рјаппеа stoppages 1000 + —-—Average ипрјаппеа stoppages 500 4 + Tr ту — А ...Dragan Ignjatović, Predrag Jovančić, Stevan Đenadić, Ivan Janković, Ivica Ristović. "The optimization of auxiliary machinery in open-cast lignite mines: a case study of bulldozers" in 7th International Symposium Mining and Environmental Protection, University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia (2019)
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The Dictionary of the Serbian Academy: from the Text to the Lexical Database
In this paper we discuss the project of digitization of the Dictionary of the Serbo-Croatian Standard and Vernacular Language. Scanning and character recognition were a particular challenge, since various non-standard character set encoding was used in the course of the almost 60-year long production of the dictionary. The first aim of the project was to formalize the micro-structure of the dictionary articles in order to parse the digitized text of and transform it into structured data stored in relational lexical database. This approach ...... the mean- ings are close, with lowercase letters. If the headword is a verb, its non-reflexive and reflexive forms are marked by Roman numerals I and II. 1. terminological markers – predefined terminological abbreviations are used to indicate the scientific domain in which a particular sense of a lemma ...
... м item in a list Etymology palaiós kainós Open parenthesis + item in a list, e.g. „(грч.“ closing parenthesis Sense 1, 2, 3 or а, б, в or I, II or trigger begin terminological markers геол. item in a list trigger begin linguistic/markers / item in a list trigger begin related words / Some ...
... Culinary Dictionary) (in Cyrillic)] Stijović, R. (2018). Građa Rečnika SANU – blago koje treba sačuvati (o digitalizaciji listića), In Naš jezik XLVI- II/3–4, Beograd: Institut za srpski jezik SANU, pp. 201–207. [The structure of the Dictionary of the SANU - the goods to be preserved (on the digitization ...Ranka Stanković, Rada Stijović, Duško Vitas, Cvetana Krstev, Olga Sabo. "The Dictionary of the Serbian Academy: from the Text to the Lexical Database" in Proceedings of the XVIII EURALEX International Congress: Lexicography in Global Contexts, Ljubljana : Ljubljana University Press, Faculty of Arts (2018)
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The Importance of Detailed Groundwater Monitoring for Underground Structure in Karst (Case Study: HPP Pirot, Southeastern Serbia)
... into Section II was up to 9 L/s and the groundwater level was generally about 11 m higher than the water level of the reservoir when the tunnel was online. The difference between the online and offline status was greatest (43.03 m) at this observation well. A characteristic of Section II is that it had ...
... of the investigations in the tunnel, data from consecutive hydrometric measurements were used to identify characteristic tunnel sections (Sections I, II and III) between four observation points (0 + 030, 3 + 160, 6 + 560 and 8 + 530 m). The three sections represent inflows or, more precisely, the differences ...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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The Newton method for solving nonlinear equations based on aggregation operators
Nebojša M. Ralević, Dejan Ćebić (2019)Nebojša M. Ralević, Dejan Ćebić. "The Newton method for solving nonlinear equations based on aggregation operators" in XLVI International Symposium on Operational Research SYM-OP-IS, Kladovo, 15-18.9.2019, Универзитет у Београду (2019)
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Application of the Fuzzy Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine
Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić (2021)The production of lignite in large open-pit mines is mainly performed with continuously operating equipment, where bucket-wheel excavators, bucket-chain excavators, belt conveyors, and spreaders are the basic machines. Smaller machines, usually of discontinuous operating nature, are commonly categorized as auxiliary machines. This paper presents the research related to the analysis of auxiliary machine parameters with the case study for a hydraulic excavator. The purpose of the analysis was to develop a model of rating quality of service of the ...Stevan Đenadić, Miloš Tanasijević, Vladimir Milisavljević, Dragan Ignjatović, Predrag Jovančić. "Application of the Fuzzy Model in the Evaluation and Selection of Hydraulic Excavators on Open-Pit Lignite Mine" in SSRN Electronic Journal, Elsevier BV (2021). https://doi.org/10.2139/ssrn.3945617
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OntoLex Publication Made Easy: A Dataset of Verbal Aspectual Pairs for Bosnian, Croatian and Serbian
Ovaj rad predstavlja novi jezički resurs za pretraživanje i istraživanje verbalnih aspektnih parova u BCS (bosanskom, hrvatskom i srpskom), kreiran korišćenjem principa Lingvističkih Povezanih Otvorenih Podataka (LLOD). Pošto ne postoji resurs koji bi pomogao učenicima bosanskog, hrvatskog i srpskog kao stranih jezika da prepoznaju aspekt glagola ili njegove parove, kreirali smo novi resurs koji će korisnicima pružiti informacije o aspektu, kao i link ka aspektnim parovima glagola. Ovaj resurs takođe sadrži spoljne linkove ka monolingvalnim rečnicima, Wordnetu i BabelNetu. ...Ranka Stanković, Maxim Ionov, Medina Bajtarević, Lorena Ninčević. "OntoLex Publication Made Easy: A Dataset of Verbal Aspectual Pairs for Bosnian, Croatian and Serbian" in Proceedings of the 9th Workshop on Linked Data in Linguistics @ LREC-COLING 2024, Turin, 20-25 May 2024, ELRA and ICCL (2024)
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Effects of external noise on threshold-induced correlations in ferromagnetic systems
Dragutin Jovković, Sanja Janićević, Svetislav Mijatović, Lasse Laurson, Đorđe Spasojević. "Effects of external noise on threshold-induced correlations in ferromagnetic systems" in Physical Review E, American Physical Society (APS) (2021). https://doi.org/10.1103/PhysRevE.103.062114
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Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia
Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary ChangeFen Huang, Ljiljana Vasic, Xia Wu, Jianhua Cao, Saša Milanovic. "Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia" in Environmental Earth Sciences, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s12665-019-8452-4
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Some models for determination of parameters of the soil oscillation law during blasting operations
... in the Kovilovača Open Pit. Blasting Nb Quk (kg) Qi (kg) Luk (m) Lpč (m) I 34 3623.0 108.0 842.0 2.2 II 36 3264.0 92.0 918.0 2.2 The record of soil oscillation velocity for blasting number II—measuring point 3 is shown in Figure 5. ‐ č ...
... 2131.52 ∙ . Figure 5. Image of soil oscillation velocity for blasting II-MM3 in the Kovilovača Open Pit. 4.2.3. Calculation of Soil Oscillation Law Parameters in the Kovilovača Open Pit Values of distances from blast sites ...
... R, recorded values of soil oscillation velocities by components vt, vv, and vl, and the resulting oscillation velocities vrez for blasting from I to II of a total of ten measuring points MM are given in Table 4. Energies 2016, 9, 617 12 of 15 Table 4. Survey of blasting parameters and measurement ...Suzana Lutovac, Dragan Medenica, Branko Gluščević, Rade Tokalić, Čedomir Beljić. "Some models for determination of parameters of the soil oscillation law during blasting operations" in Energies, Basel, Switzerland : MDPI (2018). https://doi.org/10.3390/en9080617
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P-T analiza uglja RB Kolubara
Rada Vitomir (2024)Rudarski basen Kolubara predstavlja jedno od najvažnijih ležišta lignita u Republici Srbiji i ključni je faktor u snabdevanju zemlje energijom. Kvalitet uglja iz ovog basena direktno utiče na efikasnost termoelektrana i zadovoljenje energetskih potreba. U ovom radu, opisan je značaj tehničke i elementarne analiza uglja kako bi se utvrdili fizičko-hemijski parametri uglja iz Rudarskog basena Kolubara. U drugom delu rada dat je opis P-T analize uglja i njen značaj za ocenu mogućnosti čišćenja uglja. Takođe, dati su i rezultati ...... -60 +50 -50 +40 m Zahtevano M iizmereno Slika 17. Granulometrijski sastav uzorka 2 posle drobljenja Granulometrijski sastav posle drobljenja ni kod uzorka br. 2 nije zadovoljavajući. Iznad zahtevanih vrednosti (-50mm) je 14,4% uzorka, od čega 9,4% pripada klasi preko 60 mm, a 5% klasi -60 ...
... Cvetinović, D. B. (2011). Emisioni faktor lignita kolubarskog basena. Termotehnika, 37, 241-251. 70 20. Yuan, Z. S., Wang, J., Kong, L., Bai, J., Ni, Z., Li, H., ... & Li, W. (2021). Comparison study of fusibility between coal ash and synthetic ash. Fuel Processing Technology, 211, 106593. 21 ...
... SADRŽAJ BLG p AAAAAA ARAAA AAARAAA 1 2. TEORIJSKI OKVIR ... aanaaa a a aaa a aaaai ag aae 2 2.1. Osnovni pojmovi o uglju ......c.aaaaa a n a aaaaa a ii aaiaiaae 2 2.2. Karakteristike i klasifikacija uglja.... 2.3. Elementarna i tehnička analiza uglja..............aaaaaanaaaaaanaaanaadaanaot 6 2 ...Rada Vitomir. P-T analiza uglja RB Kolubara, 2024
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Integrated Stratigraphy of the Middle–Upper Jurassic of the Krížna Nappe, Tatra Mountains
carbon and oxygen isotopes, radiolarians, calcareous dinoflagellates, radiolarites, Krížna Nappe, West ern Carpathians, Tethys... Gćologie, Lausanne, 23: 1013—1038. Bak, M., 2001. Promienice z kompleksu radiolarytow šrodkowej i gornej jury jednostki reglowej dolncj Tatr — ich znaczenic biostratygraficzne. In: Bak, K. (ed.), Przewodnik Sympozjum Terenowego, II Ogdlnopolskie Warsztaty Mikropaleontolo- giczne, Zakopane 2001 ...
... Kopa Gd N49%14.359'; E19%53.275! | Gladkic Upžglzi';““”e Thrust Fp N49%15.952'; E20%1.325' Filipka Valle) Fz High 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 biostr ...
... | | L= ——— 1 15 2 25 3 35-%6-5— -3 21 00 50 i _ green radiolarites — spotted limestones — Soltysia Maristone Fm: calcareous EJ ŠŽŠ,:'.'::ŽŽ." ii K K= uperparofihe spotted limestones and marls — O dinoflagellates Sokolica Radiolarite m | =l komy Limestone Mb ž o calpionellids |_ red nodular ...Renata Jach, Nevenka Đerić, Špela Goričan, Daniela Reháková. "Integrated Stratigraphy of the Middle–Upper Jurassic of the Krížna Nappe, Tatra Mountains" in Annales Societatis Geologorum Poloniae (2014)
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Ograničenja primene optimizacionih algoritama u slučaju kopova
Proces optimizacije površinskih kopova, kao sastavni deo strateškog planiranja, veoma je važan sa stanovišta ostvarivanja maksimalnih efekata proizvodnje. To je složen zadatak koji vrlo često podleže vrlo strogim geometrijskim i drugim praktičnim rudarskim ograničenjima. Ova ograničenja u posebno su izražena na površinskim kopovima uglja, te u značajnoj meri mogu povećati stepen neizvesnosti rudarskog projekta, odnosno izazvati neželjena dejstva u pogledu profitabilnosti poslovanja. Iz tog razloga, veoma je važna primena savremenih optimizacionih alata, koji u značajnoj meri mogu olakšati celokupan ...... odnosno skraćuje se približno 50 puta. U primeru je pokušano i sprovođenje analize za visinu bloka od 0,5 m puta (Z = 0,5) broj blokova od 32,6*106%, ali ni posle rada računara od 24 sata, rezultati nisu bili generisani zbog čega je analiza obustavljena. 82 Tabela 1. Analiza potrebnog vremena optimizacije ...
... važnu osnovu, na koju se nadogradnjom inženjerskog znanja i iskustva brže i preciznije može doći do kvalitetnih rešenja. Takođe ne treba zaboraviti ni da su savremene metode optimizacije granica kopa prepoznate kao deo industrijskog standarda i u tom smislu, široko korišćene i prepoznatljive od strane ...Dejan Stevanović, Mirjana Banković, Milica Pešić Georgiadis, Petar Marković, Dejan Ranković. "Ograničenja primene optimizacionih algoritama u slučaju kopova" in XIV Međunarodna konferencija OMC 2020, Zlatibor, Srbija, 14-17. oktobar 2020., Beograd : Jugoslovenski komitet za površinsku eksploataciju (2020)
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Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event
Barbara V. Radulović, Lubomir S. Metodiev, Neda Motchurova-Dekova, Platon Tchoumatchenco. "Early–Middle Jurassic brachiopods from Ponor Mountain, Western Balkan Mountains, Bulgaria; taxonomy, biostratigraphy and occurrence in the context of the early Toarcian Oceanic Anoxic Event" in Historical Biology (2023). https://doi.org/10.1080/08912963.2023.2190757