Претрага
1502 items
-
The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system
Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic (2016)The influence of additives (alkyl polyglucoside, Glucopon 600 CS UP and alcohol ethoxylate C18E100) on the behavior of the water/toluene/Lutensol ON 50 (technical oxoalcohol, i-C10E5) microemulsion system as a function of temperature and composition has been investigated. The phase behavior of the microemulsions was determined by vertical sections through the Gibbs phase prism (fish-like phase diagrams). Alkyl polyglucoside shifts the one phase region to lower temperatures compared with water/toluene/Lutensol ON 50 mixtures. This is contrary to the expectation, considering ...микроемулзија, толуен, алкил полиглукозид, оксоалкохол етоксилат, појачивач ефикасности, „fish“ дијаграми... Technology M. Mihailescu, M. Monkenbusch, H. Endo, J. Allgaier, G. Gompper, J. Stellbrink, D. Richter, B. Jakobs, T. Sott- manmn, B. Farago, J. Chem. Phys. 115 (2001) 9563-9577 A. Kabalnov, U. Olsson, H. Wennerstrom, Langmuir 10 (1994) 2159-2169 C. Frank, H. Frielinghaus, J. Allgaier, D. Richter ...
... Kronberg, B. Lindman, Surfactants and polymers in aqueous solution, John Wiley & Sons, Chichester, 2003 A. Kabalnov, U. Olsson, K. Thuresson, H. Wennerstrom, Langmuir 10 (1994) 4509-4513 H. Endo, J. Allgaier, G. Gompper, B. Jakobs, M. Monken- busch, D. Richter, T. Sottmann, R. Strey, Phys. Rev ...
... Surfaces, A 176 (2001) 69-83 K. Fukuda, U. Olsson, M. Ueno, Colloids Surfaces, B 20 (2001) 129-135 J.L. Chai, Y.T. Wu , X.Q. Li, B. Yang, L.S. Chen, S.C. Shang, J.J. Lu, J. Chem. Eng. Data 56 (2011) 48-52 T. Sottmann, Curr. Opin. Colloid Interface Sci. 7 (2002) 57-65 D. Byelov, H. Frielinghaus ...Marija Ilic, Franz-Hubert Haegel, Vesna Pavelkic, Dragan Zlatanovic, Snezana Nikolic-Mandic, Aleksandar Lolic, Zoran Nedic. "The influence of alkyl polyglucosides (and highly ethoxylated alcohol boosters) on the phase behavior of a water/toluene/technical alkyl polyethoxylate microemulsion system" in Chemical Industry and Chemical Engineering Quarterly, National Library of Serbia (2016). https://doi.org/ 10.2298/CICEQ141105015I
-
Savremeni pristup rešavanja problema industrijskog otpada
Mariја Bošković (2024)Rad ukazuje na savremene metode rešavanja problema industrijskog otpada, sa posebnim fokusom na pećnu prašinu koja nastaje tokom metalurških procesa, poput proizvodnje čelika u elektrolučnim pećima. U radu se detaljno razmatra hemijski sastav pećne prašine, koja sadrži teške metale poput cinka, olova i kadmijuma, i naglašavaju ekološki izazovi koje predstavlja njeno zbrinjavanje. Takođe, analiziraju se metode tretmana i valorizacije pećne prašine, uključujući pirometalurške i hidrometalurške procese, pri čemu je poseban akcenat stavljen na reciklažu cinka iz pećne prašine. Dalje, ...... mrkor (pakynrera H JIpyrHxX BHCOKOTNHIKOJICKHX ycTaHoBa; • na cy pe3yjrraTrH KOpČKTHO HaBCJIĆHH H • a HHCaM KpriHo/ma ayropckKa rIpaBa H KopHcTHO/JIa HHTeJIČKTyaJIHy CBOJHHy JIpyrux JIa. Y Beorpany, 24.9.2024. IIornuc cryneHrTa š1 H3JABA O HCTOBETHOCTH IIITAMIIAHE H EJIEKTPOHCKE BEP3HJE ...
... JCTpHOyIjy H JaBHO caormmrraBaMbe Jema, H Iipepajle, aKO Ce HaBeJIĆ HMC ayropa Ha HauHH oOJpelbleH oJ crpaHc ayropa HJ MaBaOma JIHHCHIC H aKO CC nupepala ucTpHOyHMpa NOJ. HCTOM MHHH CHHUHOM JIHICHHOM. OBa JMHeHHA Hc J(03BOJbaBa KOMepnujanHy yroTpeOy Jenma H rpepajta. AyTopcrBo — 0e3 mpepa/a. /loO3BOJbaBaTC ...
... 3aBPpIHHOT Ppaa H pe3HMMC paja Ca KJByuHHM peuHMa; IL jaBHO NOCTyHIaH y OTBOPpCHOM IIpHcTyHOy, TaKO a Ta MOTy KOPpHCTHTH CBH KOjH nmomrryjy ojpenOoe campxxkaHe y OJaOpaHoOM THIHy NMHHCHHC KpcaTHBHC 3aje/UHMIC (Creative Commons) 3a Kojy caM ce y3 car11ACHOCT MeHTOPa OJUIyuHo/)a. Ayropcrpo (CC ...Mariја Bošković. Savremeni pristup rešavanja problema industrijskog otpada, 2024
-
Application of VIКOR method in the selection of an optimal splution of excavation “Borska Reka” ore deposit
Sanja Bajić, Dragoljub Bajić, Branko Glušćević, Radmila Gaćina. "Application of VIКOR method in the selection of an optimal splution of excavation “Borska Reka” ore deposit" in 9th International Conference Mining and Environmental protection MEP, 24 – 27 May 2023, Sokobanja, Serbia , Belgrade : University of Belgrade-Faculty of mining and geology (2023)
-
Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules
The stability analysis of homogeneous rock slope following the Hoek–Brown failure criterion under the hypothesis of different flow rules is performed based on limit equilibrium and finite element methods. The applied failure criterion is the generalized Hoek–Brown that can be introduced as a shear/normal function in analysis applying different flow rules. The results are compared with those obtained by the application of equivalent shear strength parameters of the Mohr–Coulomb criterion, considering that this is still the most widely used ...Kružna klizna površ, Huk-Braunov kriterijum loma, Kriterijum popuštanja, Smičuća/normalna funkcija, Nivo napona, Verovatnoća i parametarska analizaSvetlana Melentijević, Zoran Berisavljević, Dušan Berisavljević, Claudio Olalla Marañón . "Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules" in Bulletin of Engineering Geology and the Environment , Springer (2024). https://doi.org/10.1007/s10064-024-03667-0
-
Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite
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 ...... and the samples a and c on the other hand are rather similar, but sample d appears to be more heterogeneous. The narrow O-H stretching,; modes at ~3670 cm-! (Figure 4) are very specific and fit well with asbestos. On the contrary, the broad O-H band peaking at ~3400 cm~! with a d shoulder at 3200 ...
... phases are identified on the XRPD spectra (Figures 4, A1 and A?2). Table 2 summarizes the phases identified. The FTIR spectra of asbestos in the O-H and H»O stretching, range (3000–4000 cm !) only show narrow peaks characteristic of O-H vibrations [43]. In our case, strong and broad ~3200 and 3400 ...
... Mineral. 1996, 81, 1117–1125. [CrossRef] Gatta, D.G.; Merlini, M.; Valdrč, G.; Liermann, H.-P.; Nenert, G.; Rothkirch, A.; Kahlenberg, V.; Pavese, A. On the crystal structure and compressional behavior of talc: A mineral of interest in petrology and materia! science. Phvs. Chem. Miner. 2013, 40, 145-156 ...Philippe Colomban, Aleksandar Kremenović. "Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite" in Materials, MDPI AG (2020). https://doi.org/10.3390/ma13163597
-
Tektonska evolucija ugljevičkog basena (Bosna i Hercegovina)
Slobodan Dragić (2024)U radu je prezentovana šira slika tektonske evolucije ugljevičkog basena, kao i Dinarida uopšte. Prikazani su litostratigrafski odnosi istraživanog područja, kao i kratak pregled tektonskih jedinica koje se nalaze u domenu basena. Najveća pažnja posvećena je kinematskoj analizi rasjednih struktura i interpretaciji podataka u svjetlu tektonske evolucije basena. Ugljevički basen zapunjen je oligocensko-miocenskim sedimentima, a njegovu osnovu grade paleozojsko-mezozojske formacije. Najstarije tvorevine na ovom području su permski sedimenti. Trijaski i kredni deponati, uglavnom krečnjaci, reprezent su tvorevina ...... KOpČKTHO HaBCJICHH H • na HHCaM Kprmmio/na ayropcKa IIipaBa H KOpHcTHO/a HHTeJIČKTy2aJIHy CBOJHHy J(pyrHXx numa. V Beorpany, 23.09.2024. IIornuc cryneHra O0pasau 2 H3JABA O HCTOBETHOCTH IIITAMIIAHE H EJIEKKTPOHCKE BEP3MHJE 3ABPIIHOT PAJIA MHwe (HMe poj}iHTeJba) H pe3HMe cryaneHra CnoOomaH ...
... JHCTpHOynujy H jJaBHO caommraBaMb Jema, H Hpepajle, aKO Ce HaBeJIĆ HMC ayropa Ha HauHH OJpelbeH oJ crpaHc ayropa HNM MaBaoOma JMIIČHHC H aKO CeČ nupepala JHCTpHOyHMpa OJ HCTOM MHH CHHMUHOM JIMHCHHOM. OBa JMHeHHa He J(03BOJbaBa KOMeCpnujaJiHy yroTpeOy Jezma H rpepajta. AyTOpcrBo — 0e3 mpepa/a. /lo3BOJbaBaTc ...
... Beograd. De Leeuw, A., Mandić, O., Krijgsman, W., Kuiper, K., Hrvatović, H., 2012. Paleomagnetic and geochronologic constraints on the geodynamic evolution of the Central Dinarides, Tectonophysics, 530-531, p. 286-298. Dimitrijević, M. 2001. Dinarides and the Vardar Zone: a short review of the ...Slobodan Dragić. Tektonska evolucija ugljevičkog basena (Bosna i Hercegovina), 2024
-
Natural two-dimensional pyrophyllite: Nanoscale lubricant, electrical insulator and easily-machinable material
Borislav Vasić, Radoš Gajić, Ivana Milošević, Žarko Medić, Marina Blagojev, Marko Opačić, Aleksandar Kremenović, Dejan Lazić (2022)Pyrophyllite, with the chemical formula Al2Si4O10(OH)2, is a naturally occurring and abundant van der Waals mineral belonging to the group of phyllosilicates. It is very soft, layered crystal used for sculpting and an excellent electrical and thermal insulator aimed for the operation at high pressure and temperature. Here, for the first time, two-dimensional (2D) pyrophyllite obtained by both mechanical and liquid phase exfoliation is presented and investigated at the nanoscale. The layered structure provides low friction coefficient of around ...Atomic force microscopy, Insulating properties, Nanofriction and wear, Natural two dimensional materials, Phyllosilicates, PyrophylliteBorislav Vasić, Radoš Gajić, Ivana Milošević, Žarko Medić, Marina Blagojev, Marko Opačić, Aleksandar Kremenović, Dejan Lazić. "Natural two-dimensional pyrophyllite: Nanoscale lubricant, electrical insulator and easily-machinable material" in Applied Surface Science, Elsevier BV (2022). https://doi.org/10.1016/j.apsusc.2022.155114
-
Polyhedral characteristics of the cosalite-type crystal structures
Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus (2019)Sabina Kovač, Predrag Dabić, Aleksandar Kremenović, Aleksandar Pačevski, Ljiljana Karanović, Marko V. Rodić, Martina Tribus. "Polyhedral characteristics of the cosalite-type crystal structures" in The Canadian Mineralogist, Mineralogical Association of Canada (2019). https://doi.org/10.3749/canmin.1900017
-
Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery
... sam- ple. A greater calcite concentration compared with the CIMx sample is evident in the CIBd sample, together with the clay minerals, quartz and feldspar. The CIBd sample is a mixture of the CIMx and CC sample in a ratio of ~50:50, as reported by the pottery manufacturers, whicl h was confirmed ...
... (EG) and heated at 550%C for 1 h (H). The mineral phases were identified using the Rigaku PDXL software and the PDF-2 database (International Centre for Diffraction Data). The chemical com- position was determined by X-ray fluorescence (XRF) spectros- copy using a PANalytical MiniPal 4 XREF spectrometer ...
... solvated with ethylene glycol (EG) and heated at 550"C (H). Clay Minerals Sample CIMx Fig. 3. The SEM and EDX analysis of the investigated CIMx and CIBd samples. XRD - sample CC C - calcite Q- quartz c || š 5 H rl -a : s responsible for the high LOI (31.88%) (Milheiro et ...Maja Milošević, Biljana Đorđević, Mihovil Logar. "Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery" in Clay Minerals (2020). https://doi.org/10.1180/clm.2020.20
-
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... [wt%] +-Pk201O. + PR948 + Pk1808 radiolarian St om io sp ha er a mo lu cc an a m Co lo mi sp ha er a na gy i ua -— sa Sc hi zo sp ha er el la C o l o m i s p h a e r a pi en in en si s a < Pk35 A. radiolarian o mwp Zadnia Kopka Košcieliska section in the Western ...
... 14 N |s|ae |s Š s||- -i o o |a| z IG F a || Fd -i = ::- Fj Š „ -i a KEŠO sž F| 8 - [} H| -i s Š ž ašadećE Zoačšasš Š -y- Š Š s SBZOŠEMB S85S2SSŠ Š .s a s 3 :Bo 2 B 0 -O B8 Š & ŠaŠw - Đ s = SBS „25SSS o o o SSE Ž E PR:K Š w s u s eFegoSs R:B -KA -NN= 5338 !s a o s > FCESCOSOSSŽŽŠSNULU 2 Š ...
... the 6 R.JACH ETAL. = Lejowa Valley A H š–.·a g -- Age 2 %šg Sample CaCO,[wt%] Microfacies Calcareous dinoflagellates and calpionellids S 8558 no. -a 0 50 ~+ O ; .. NE E M::0:| 38398 „553Šaš Early Tith. ssaseš3a de —) ž LBlza,i29o ši i H Š || B #2128. kRI:B:B1Bi #-U110-126O. ...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)
-
Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal
Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović (2021)... observed around 950 cm−1, corresponding to C–H bending (Figure S8b). More pronounced peaks of C–H than of C–C or C=C vibrations indicate that main gaseous products are methane and ethene. The intense releasing of hydrocarbons begins at a temperature higher than 450 ◦C. A small amount of produced CO2 (peaks between ...
... corresponding to C–H bending (Figure S8a). − − − − − − − − − − − − − Figure 5. Enlarged image of thermogravimetric analysis (TGA)-Fourier transform infrared spectroscopy (FTIR) thermogram of lignite/HDPE mixture with indicated peaks. A time of 20 min corresponds to a temperature of 227 ◦C ...
... liquid-phase degradation of HDPE. Polym. Degrad. Stab. 2002, 76, 495–501. [CrossRef] 22. Punkkinen, H.; Oasmaa, A.; Luntama, L.J.; Nieminen, M.; Ylijoki, L.J. Thermal Conversion of Plastic Containing Waste: A Review. Research report no D4.1–22; Solution Architect for Global Bioeconomy & Cleantech Opportunities: ...Ivan Kojić, Achim Bechtel, Nikoleta Aleksić, Dragana Životić, Snežana Trifunović, Gordana Gajica, Ksenija Stojanović. "Study of the Synergetic Effect of Co-Pyrolysis of Lignite and High-Density Polyethylene Aiming to Improve Utilization of Low-Rank Coal" in Polymers, MDPI AG (2021). https://doi.org/10.3390/polym13050759
-
Proračun recirkulacionih pumpi u postrojenju za odsumporavanje dimnih gasova ,,TENT B"
Tomislav Trpković (2024)Predmet ovog rada baziraće se na proračunu i usvajanju mašinskih instalacija potrebnih za nesmetano funkcionisanje sistema dve međusobno povezane celine Absorber - Pumpna stanica, preko FRP ( Fiberglass Reinforced Plastic) cevovoda kojim se odvija transport suspenzije krečnjaka neophodnog u samom procesu odsumporavanja dimnih gasova. Pored tehničkog opisa same tehnologije koja uključuje tri objekta: Absorber, Pumpna Stanica i cevovod, glavni deo rada odnosiće se na proračun i usvajanje mašinskih instalacija koji uključuju recirkulacione radijalne centrifugalne pumpe i cevovode kojima ...postrojenje za odsumporavanje dimnih gasova, termoelektrana, pumpna stanica, FRP cevovod, Absorber, transport suspenzije gipsa, prirubnica, ventil, potisni cevovod, usisni cevovod... - sila, a A - površina. Snaga (N): Snaga je rad koji pumpa obavlja po Jedinici vremena i obično se izražava u kilovatima (kW). Jednačina za izračunavanje snage može biti: xgxQxH N=PQQ ) gde je p - gustina fluida, g-gravitaciona konstanta, Q - protok, H - visinska razlika, a n - efikasnost ...
... m3/h; L/G- odnos protoka recirkulisane suspenzije gasa koji se tretira u apsorberu. UNmŠ9;FG - protok sirovog gasa na ulazu u apsorber Nm3/h Na osnovu iskustva na sličnim postrojenjima, a kako bi izdvajanje SO2 bilo dovoljno efikasno,usvojeno je L/G =19,50 I/Nm3 Za FG= 3,970,244 Nm3/h vlažan ...
... unutrašnji prečnik cevi Di m 1.4 površina preseka A m2 1.5386 Gubici od lokalnih otpora H1 mLlC 3.5225 gubici od trenja H2 mLC Č/\(0.2194 Ukupno gubici H3 mLC /3.742 gubici u obe linije H4 mLlC 3.742 usvojena vrednost H mLC |A brzina suspenzije Qp/A/3600 vp m/s 2.33 faktor trenja (Moody diagram) ...Tomislav Trpković. Proračun recirkulacionih pumpi u postrojenju za odsumporavanje dimnih gasova ,,TENT B", 2024
-
A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers
Effectiveness evaluation is one of the basic components of engineering asset management and maintenance engineering in general. Effectiveness is an overall concept representing a measurement of quality of service level for the analyzed engineering system. This concept contains a series of partial indicators relating to time in operation and time for maintenance activities, as well as functional properties of the system. This article describes the analysis and structuring of partial indicators, as well as the development of a model ...Miloš Tanasijević, Predrag Jovančić, Dejan Ivezić, Uglješa Bugarić, Radiša Đurić. "A fuzzy-based decision support model for effectiveness evaluation - a case study of examination of bulldozers" in International Journal of Industrial Engineering: Theory, Applications and Practice (2019)
-
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... Appendix A). 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 s t o n 1 9 J u ly 2 0 2 1 988 T. Broerse et al. Figure 3. Any homogeneous deformation F can be written as a succession of a simple shear ...
... (B8) 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 s t o n 1 9 J u ly 2 0 2 1 1016 T. Broerse et al. s—l —1 ON l}s-1 aN 1} -1 nr —|n = Al0 a 4fits| a= a4] 4 (Al0) l-s 1 such that: a 1} — - —u,— Noo ...
... shear zone. Fig. 16 clearly shows this combination of strike-slip and thrusting in cross-section a–a’. To the south of the 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 s t o n 1 9 J u ly 2 0 2 1 ...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
-
Analiza pouzdanosti dozera angažovanih na površinskim kopovima RB Kolubara
U radu je izvršena uporedna analiza pouzdanosti transportnih sistema dozera koji rade na površinskim kopovima Rudarskog basena Kolubara. Period za koji je vršena analiza je prvih deset godina eksploatacije. Efikasnost tehnološkog procesa na otkopavanju korisne mineralne sirovine i otkrivke u velikoj meri zavisi od rada dozera. Iskorišćene su matematičke metode za aproksimaciju i identifikaciju zabeleženih vremena u radu, kako bi se dobili analitički pokazatelji pouzdanosti. Na ovaj način se bitno podiže kvalitet upravljanja procesom eksploatacije i održavanja mašina na ...... Ep all 8 x 8 90 | 5 80 Ji 63,2 70 7 60 50 40 30 6 20 5 10 5 4 3 2 3 1 2 05 03 1 02 11=828,791 A ot Pant itirna 0 04 02 0304 060,81 3.45678 10 2 P 20 30 40 60 89100 t 102 h 179 , 1 791 , 828 ) ( ÷ ø ö ç è æ - = t Lieb e t R ...
... Teorijska funkcija pouzdanosti za dozer firme Caterpillar je. · Dressta TD 25 H Tablica 7. Rezultati analize za dozer Dressta TD 25 H i 1 2 3 4 5 6 7 t, h 230,00 460,00 690,00 920,00 1150,00 1380,00 1610,00 t, 1000 h 0,23 0,46 0,69 0,92 1,15 1,38 1,61 N (t) 6 8 8 6 8 3 1 ...
... 9762 1,0000 Re (t), - 0,6429 0,2857 0,1667 0,0476 0,0238 0,0000 t, h 440,00 440,00 440,00 440,00 440,00 880,00 fe (t), h-1 8,1169E-04 8,1169E-04 2,7056E-04 2,7056E-04 5,4113E-05 2,7056E-05 e (t), h-1 9,8814E-04 1,7483E-03 1,1962E-03 2,5253E-03 1,5152E-03 2,2727E-03 ...Filip Miletić, Dragan Milčić, Miloš Tanasijević, Miloš Milovančević. "Analiza pouzdanosti dozera angažovanih na površinskim kopovima RB Kolubara" in 10th International Conference Coal 2021, Jugoslovenski komitet za površinsku eksploataciju, Zlatibor (2021)
-
Fuzzy Model for Risk Assessment of Machinery Failures
The main goal of this research was the development of an algorithm for the implementation of negative risk parameters in a synthesis model for a risk level assessment for a specific machine used in the mining industry. Fuzzy sets and fuzzy logic theory, in combination with statistical methods, were applied to analyze the time picture state of the observed machine. Fuzzy logic is presented through fuzzy proposition and a fuzzy composition module. Using these tools, the symmetric position of the ...... time period during which a machine was out of operation was taken from the statistical data provided by the maintenance service of the quarry. The shortest recorded downtime was 0.5 h, while the longest downtime was 40 h. Downtime can be short for some failures, which can be a problem during the fu ...
... easily determine the labor hours for each class. class 10 was assigned a time period of 7 h, which was the shortest time the crushing machine system operated between failures, while class one was assigned a time period of 3500 h, which was the longest operating time between two failures of the same ...
... carried out. For instance, in a crushed rock mass transportation system, it is possible to replace rubber belts on time in order to reduce the number of breakdowns, because the time it takes for the system to return to operation after a failure is 20 h or more, which can have a serious impact on the planned ...Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković. "Fuzzy Model for Risk Assessment of Machinery Failures" in Symmetry, MDPI AG (2020). https://doi.org/10.3390/sym12040525
-
Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content
Nina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović (2019)Mesoporous anatase nanopowders were doped with 0.05−0.5 mol% of W6, in order to obtain more efficient photocatalyst than TiO2 Degussa P25 in the degradation of amitriptyline (AMI) under simulated solar irradiation (SSI). Dominant XRPD peaks were ascribed to anatase phase, with additional peaks which could correspond to brookite, TiO2 bronze and sodium titanate, Na2Ti9O19. The Raman scattering measurements have confirmed anatase as dominant phase, with broad Raman feature at ~270 cm−1 possibly related to Ti–O–Na stretching vibration. All W-doped ...Sol-gel synthesis, Doped titania nanopowders, XRPD, Raman spectroscopy, Adsorption and photocatalytic degradation, Psychiatric drugsNina L. Finčur, Maja J. Šćepanović, Mirjana Grujić-Brojčin, Biljana F. Abramović, Jugoslav B. Krstić, Aleksandar Kremenović, Tatjana Srećković, Aleksandar Golubović. "Adsorption and degradation of some psychiatric drugs by sol-gel synthesized titania-based photocatalysts: influence of tungsten and sodium content" in Journal of Sol-Gel Science and Technology, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s10971-019-04925-4
-
P-T analiza RMU Bitola – krupne klase
Nemanja Dobrosavljević (2024)Cilj ovog diplomskog rada je bio ispitivanje mogućnosti i tehnologije čišćenjauglja, kao i predstaviti rezultate pliva – tone analize koja ima za cilj ocenu mogućnosti čišćenja uglja - krupnih klasa posmatranog uzorka. Da bi se ispitivanje i analiza mogućnosti čišćenja rovnog uglja u REK Bitola uspešno priveli kraju, moralo se uraditi uzorkovanje reprezentativnog uzorka iz koga se potom izdvaja prvi deo koji služi za određivanje sadržaja vlage. Pored tog dela iz uzorka se izdvaja i drugi njegov deo koji će ...ugalj, lignit, Bitola, PT analiza, pliva-tone analiza, čišćenje uglja, suvi ugalj, vlažan ugalj, pepeo, donja toplotna moć, čist ugalj, jalovina, bilans... pc3yjnrTaTrH KODCKTHO HaBC/JICHH H • a HHCaM KpimHo/ma ayTopcka npaBa H KopHcTHO/Ja HHTCJIČKTyaJIHy CBOjJHHy JIpyrHx Jmuua. y Beorpaay, _C. 9. 2274. O60pasaij 2 H3JABA O HCTOBETHOCTH IIITAMIIAHE H EJIEKTPOHCKE BEP3HJE 3ABPIIIHOT PAJIA MHwe (HMe poziiTeJba) H rpe3HMe cTy/leHTa u·ew AbA [ roivM ...
... uglja. Izveden je veliki broj formula koje imaju za svrhu dobijanja te vrednosti, a jedna od njih je i formula D. l. Mendeljejeva Q. = 4,8(81C+310H—26(O-—5S), KJ/kg pri čemu je: Q. - GTV uglja, kJ/kg, C, H, O, S - Procentualni sadržaj odgovarajućih elemenata u uglju. 19 Formula je postavljena ...
... t _ | “ h ll 'j' LUČNO SITO ( / J Mulj _J I ču Mulj -10+0,5mm · -0,5mm Ć) (+-) :100+5mm -0,5 mm Suspenr VIBRO SITO -0,5 mr* (a = 0.5 mm) -) (-) HO || IZ SJspemz VIBRO SITO Slika 10. Proces čišćenja uglja u autogenoj suspenziji ODREĐIVANJE GUSTINE KLASE -0,5 + 0 MM Priprema autogene ...Nemanja Dobrosavljević. P-T analiza RMU Bitola – krupne klase, 2024
-
Geotermalni potencijal pliocensko-kvartarnih sedimenata na teritoriji opštione Novi Beograda
Matija Ognjanović (2024)Svrha ovog rada određivanje geotermalne potencijalnosti teritorije opštine Novi Beograd. Određivanje geotermalne potencijalnosti Novog Beograda predstavlja kvantifikovanje geotermalnih resursa na njegovj teritoriji.Analizom opštih karakteristika tj. geografskim položajem, klimatskim, hidrološkim, hidrografskim i geomorfološkim karakteristika, zajedno sa geološkim, hidrogeološkim i opštim geotermalnim karakteristika istražnog područja stiče se jasan zaključak o istražnom području.U savremene geotermalne indikatore, u vidu povećane temperature podzemnih voda, pre svega zbog efekta toplotnog ostrva i sintezom svih pređašnjih podataka, kao podloge za dalju, detaljniju, analizu dolazi se do koraka ...... KODČKTHO HaBCJIĆČHH H • a HHCaM KpiHo/a ayropcka rpaBa H KOpHcTHO/Ha HHTeJIČKTyaJIHy CBOJHHy JIpyrHx Jmuama. V Beorpany, __27.09.2024. IIornuc cryneHra Ob0pasau 2 H3JABA O HCTOBETHOCTH IHTAMIIAHE H EJIEKTPOHCKE BEP3MHJE 3ABPIHHOT PAJIA Hwe (HMe pojiHTeJba) H IIpe3HMe cTyJIeHTa Marnja ...
... MHynjaBJbyjeM a je mrraMIaHa Bep3HJa MOTr 3aBDpHIHOT pajla HCTOBETHa CJIČKTDOHCKOJ BEp3HJH KOjy CaM ripenao/na paj ojUIarabba y JiMrHTaJIHOM penmo3HTOpHJyMy Py/lApcKO-TCOJIOHIKOT (akyarreTra. /{o03BOJbaBaM a Ce OOJaBC MOJH HHuHH TOJ1a1iH BC3aHH 30 JOOHJaMbC aKaJIĆMCKOT 3BaMba, KaO IITO Cy HMC H HIpe3HMe ...
... 3aBPIHHOT paja H pesaHMC paja Cca KJb5ByuHHM peuHMa; IL jaBHO MOCTyHTaH y OTBODpCHOM IIpHcCTyHy, TaKO a ra MOTy KOPpHCTHTH CBH KOjH nmomrrTyjy ojpenOe canpx)kaHc y OJaOpaHoOM THy NMHHCHHC KpcaTHBHC 3jajeJHHMHIC (Creative Commons) 3a Kojy caM ce y3 car)1aCHOCT MeHTOPa OJUIyuHo/)a. Ayropcrpo (CC ...Matija Ognjanović. Geotermalni potencijal pliocensko-kvartarnih sedimenata na teritoriji opštione Novi Beograda, 2024
-
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