Претрага
1574 items
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Doprinos rešavanju problema povećanja tačnosti kontinualnog merenja protoka mase na tračnim transporterima
Snežana Aleksandrović (2005)Snežana Aleksandrović. Doprinos rešavanju problema povećanja tačnosti kontinualnog merenja protoka mase na tračnim transporterima, Beograd:Rudarsko Geološki Fakultet, 2005
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FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina
... JI š š |} š ii s e š H || i š } ž Š | e š - H H 1 a Fi i i NMA 41 “0 — s%0 ~ 300 ~ 3%0 __3MO _1%O0 _ 4M00 00 400 30 3000 3800 2000 Wavenumber (cm') Wavenumber (cm') šžg C), &h ı NA d) . HDTMA š A OE ii |} “ LIJPI | Mig ~FML_R “ š |- L šš s i s BOA A H || s|--38 8 P A g s - | „ihi ...
... 1500 1000 Wavenumber {cm ) Wavenumber {cm ') š 18p f) PTMA |j | |ž š \|E a E 13 i - PMV A | i n g"VA/B i g .| š P E Hi )s i . H | Š PONE! š i || || š . } ii |j | ı || || _MO |1 315 /WAW M | - Ć 4000 300 2000 1000 2000 1500 1000 Wavenumber (cm ) Wavenumber (cm } Figure 1. FTIR spectra ...
... stretching vibrations, while band at 3223 cm ! represent overtone of bending vibrations (2v)(H.O)) (He et al., 2007). At the spectrum of the HDTMA bromide, in the region from 3050-2800 cm !, several bands occur (Fig. 1b). Shoulder at 3030 cm ! and band at 3018 cm ! represent vs(N-CHx) vibrations (Madejova ...Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević. "FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina" in Book of Proceedings / 3rd International and 15th National Congress Soils for Future Under Global Challenges, 21-24 September 2021 Sokobanja, Serbia , Belgrade : Serbian Society of Soil Science (2021)
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Surface functional groups and degree of carbonization of selected chars from different processes and feedstock
Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann (2022)The knowledge ofthe structural and chemical properties of biochars is decisive for their application as technical products. For this reason, methods for the characterization of biochars that are generally applicable and allow quality control are highly desired. Several methods that have shown potential in other studies were used to investigate two activated carbons and seven biochars from different processes and feedstock. The chars were chosen to cover a wide range of chemical composition and structural properties as a hardness ...Biougalj, različiti procesi dobijanja, različite sirovine, površinski aktivne grupe, x-ray, FT-IR,XPS... CH bands between 2800–2890 cm ' is very low and peaks may be interfered by the instrumental artefacts described above, how- ever, they should be present according to 30% sp? hybridized carbon found by XPS. The C =O stretching vibration at 1689 (untreated) and 1686 cm ” (treated) can be assigned ...
... artefacts o 60 | < o jfei 50 j 403 1) 3748 2) 3675 30 | # i i 3) 3650 ~ 60 20% i 1) 3748 kii 2) 3675 101 „ 3) 3649 J 4000 3900 3890 3700 3600 3500 v/cm"1 0 — —— —— ————-{ii, ——— 4000 3500 3000 2500 2000 1500 1000 500 v/ cm" b) 100 4 0) 2)3)4) —— HW1100g untreated 90 —— HW1100g ...
... VA, USA [68]. BW550s was a commercial charcoal sold by proFagus GmbH, Bodenfelde, Germany. It was made from beech (Fagus spec.) wood pieces (< 30 cm) that where dried to a water content of 15-18% and pyrolized at 550 "C by use of the Degussa process in a retort with a pyrolysis time of typically ...Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann. "Surface functional groups and degree of carbonization of selected chars from different processes and feedstock" in PLOS ONE (2022). https://doi.org/10.1371/journal.pone.0277365
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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 ...... exhibiting, a serpentinite-like signature show a rather broad ca. 680 cm-! peak (full width at half height between 50 and 100 cm”!,asin Figure 5 (sp4) and Figure 8 (sp3)), alttough the FWHH of the pristine fiber is less (close to ~30 cm-! (Figure 7 [32])). The broadening indicates a distribution of ...
... 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 cm~! is assignable to water traces adsorbed at the pore surface, as observed ...
... 500 1000 1500 2000 -1 Wavenumber / cm O 250 500 750 1000 1250 1500 Wavenumber / cm" Figure 8. Representative Raman spectra recorded on some spots of samples a (left) and d (right) (see Figure 1). For instance, the Si-O-Si bridge mode shifts from ca. 658 cm”-! in amosite (“brown asbestos”, used ...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
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Sorpcija herbicida na neorganski i organski modifikovanom prirodnom montmorionitu iz Bogovine
Lazar M. Kaluđerović (2018-01-17)fikasnost prilikom sorpcije S-metolahlora i klomazona od strane neorganskih iorganski modifikovanih montmorionita sa lokaliteta Bogovina odreĎena je metodombach adsorpcije. Uzorci montmorionita su tretirani prvo rastvorom NaCl a zatim irazličitim koncentracijama organskih kompleksa. Adsorpcione izoterme su dobijenetretiranjem uzoraka različitim koncentracijama herbicida. Detaljna mineraloškakarakterizacija uzoraka uraĎena je metodom rendgenske difrakcije. Rezultati interakcijemontmorionita sa organskim kompleksima i herbicidima dobijeni su primenomrendgenskih, optičkih, termičkih i spektroskopskih metoda.Na osnovu rezultata rendgenskih ispitivanja uzoraka, utvrĎeno je prisustvoorganskih kompleksa i herbicida u meĎuslojnom prostoru montmorionita.Montmorioniti modifikovani ...adsorpcija, montmorionit, heksadeciltrimetilamonijum bromid,feniltrimetilamonijum hlorid, S-metolahlor, klomazon... čistog klomazona u regionu od 2000-1300 cm-1 74 Slika 28. FTIR spektri čistog kolamzona, Na-montmorionita i Na-montmorionita sa klomazonom 75 Slika 29. FTIR spektri HDTMA-montmorionita zasićenih sa klomazonom 76 Slika 30. FTIR spektri HDTMA-montmorionita zasićenih ...
... absorpcionom trakom na 3018 cm−1 i ramenom na 3032 cm−1 (slika 17). Prema nekim autorima, dve absorpcione trake na oko 3030 cm−1 i 3018 cm−1 u spektru čistog HDTMA odgovaraju νas(N–CH3) vibracijama (Madejova et al., 2009), dok prema drugim autorima, traka na 3018 cm−1 potiče od simetričnih 51 ...
... trake sa 1674 cm-1 (C=O vibracije) kod čistog S-metolahlora na niţe talasne brojeve (1639 cm-1) nakon sorpcije na PTMA-montmorionitu, (2) malo pomeranje trake (C=C vibracije fenil prstena) sa 1462 cm-1 na niţe talasne brojeve (1461-1448 cm-1) i (3) Pomeranje trake sa 1363 cm-1 (C=C-N vibracije) ...Lazar M. Kaluđerović. "Sorpcija herbicida na neorganski i organski modifikovanom prirodnom montmorionitu iz Bogovine" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2018-01-17)
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Synthesis and characterization of high-pressure and high-temperature sphene (CaTiSiO5)
Jelena Pantić, Vladimir Urbanovich, Vesna Poharc-Logar, Bojan Jokić, Marija Stojmenović, Aleksandar Kremenović, Branko Matović (2014)Sphene (CaTiSiO5), a calcium titanosilicate ceramic has been prepared from a powder mixture of CaCO3, TiO2 and SiO2 using vibro-milling for homogenization and activation of precursors. During the highpressure and high-temperature synthesis (HPS) process at 4 GPa and 1,200 °C, sphene undergoes into phase transition, from room-temperature phase P21/a to high-temperature phase A2/a. Evidence of that structural phase transition is given in this paper using infrared, Raman spectroscopy and X-ray powder diffraction. Rietveld refinement was employed to get the ...Jelena Pantić, Vladimir Urbanovich, Vesna Poharc-Logar, Bojan Jokić, Marija Stojmenović, Aleksandar Kremenović, Branko Matović. "Synthesis and characterization of high-pressure and high-temperature sphene (CaTiSiO5)" in Physics and Chemistry of Minerals, Springer Science and Business Media LLC (2014). https://doi.org/10.1007/s00269-014-0693-x
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Permanent GNSS monitoring of landslide Umka
Mileva Samardžić Petrović, Jovan Popović, Uroš Đurić, Biljana Abolmasov, Marko Pejić, Miloš Marjanović (2020)Клизиште Умка је једно од највећих насељених активних клизишта у Србији. Активност клизишта Умка се прати већ више од 85 година, различитим геотехничким и геодетским техникама. Од 2010. године, активност kлизишта се континуирано прати у реалном времену аутоматизованим перманентним системом за праћење базираним на Глобалним навигационим сателитским системима (ГНСС). Поред тога, од 2018. године активност клизишта се додатно прати кинематичким ГНСС одређивањем положаја скупа карактеристичних тачака као и применом UAV фотограметрије. Главни циљ овог рада је приказ резултата опажања три ...... 2D displacement was 84 cm towards the northwest. Furthermore, during the same period, the vertical displacement was nearly -30 cm. During the second time period (Figure 2.) the object point has moved 63 cm towards the northwest and the vertical displacement was nearly -16 cm. Generally, both graphics ...
... nts (D) larger than 6 cm, during the time period from April 2018 to April 2019 are presented in Table 2. During the time period from April 2018 to November 2018 the horizontal displacements ranged from 0 cm to 13.9 cm, while the maximum vertical displacement was -23.4 cm. During the time period ...
... -49 -48,4 60,6 77,6 -130 The horizontal displacements of approximately 21% of all points ranged from 0 to 2 cm, 33% ranged from 2.01 to 4 cm, 23% from 4.01 to 6 cm, and 33% larger than 6 cm. The largest horizontal displacements were noted in the zone along the road M26 and right below it towards ...Mileva Samardžić Petrović, Jovan Popović, Uroš Đurić, Biljana Abolmasov, Marko Pejić, Miloš Marjanović. "Permanent GNSS monitoring of landslide Umka" in International Conference on Contemporary Theory and Practice in Construction XIV Stepgrad, University of Banja Luka, Faculty of Architecture, Civil Engineering and Geodesy (2020). https://doi.org/10.7251/STP2014091S
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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 ...... S(cynaor) = 0.76 cm 1.67 = S(hornombenor necka) 0.76 cm => S(HOTHOJBQHOI' mecka) — 0.76 cm · 1.67 s(HOTHO}'beHOI' necka) — 1.3 cm t= 10 god S(cyaor) = 0.88 cm 1.67 = S(nornonsenor necka) 0.88 cm => S(HOTHOJBQHOI' mecka) — 0.88 cm · 1.67 s(HOTHO}'beHOI' necka) — 1.5 cm »> Bowles (1977) ...
... S(cyaor) = 0.76 cm 1.7 = S(nornojbeHor necka) 0.76 cm => S(HOTHO}beHOI' mecka) — 0.76 cm · 1.7 s(HOTHO}'beHOI' necka) — 1.3 cm t= 10 god S(cyaor) = 0.88 cm 1.7 = S(nornoujbeHor necka) 0.88 cm => S(HOTHO}beHOI' mecka) — 0.88 cm · 1.7 s(HOTHO}'beHOI' necka) — 1.5 cm MuznanHa Muuera, ...
... f615/21 npuzor 0p. 7 S(cyaor) = 0.81 cm 2.8 = S(nornoujbeHor necka) 0.81 cm => S(HOTHO}beHOI' mecka) — 0.81 cm · 2.8 s(HOTHO}'beHOI' necka) — 2.3 cm t= 10 god S(cynaor) = 0.94 cm 2.8 = S(nornoujbeHor necka) 0.94 cm => S(HOTHO}beHOI' mecka) — 0.94 cm · 2.8 s(HOTHO}'beHOI' necka) — 2.6cm ...Милана Мичета. Утицај промене нивоа подземне воде за услове плитког фундирања у крупнозрном тлу, 2024
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Some models for determination of parameters of the soil oscillation law during blasting operations
... Veliki Krivelj Open Pit. e Model 2 e Model 3 By using experimental data given in Table 1, where: Oscillation velocities, v[cm/s] vy, = 49.4477 RO" 2 ——-]—t ™] 0 10 20 30 40 50 60 70 80 90 100 V2 = 59.7588 - R71°419 Ry = 10.7722; Ry = Ryo = 30.1621; Rj,1 — Rj =h = 2.1544, according to the Equation ...
... Ro2-4410 (31) Graphic survey of soil oscillation law is shown in Figure 6. De o J oo ! vy, = 2,131.52 -R™" Oscillation velocities, v[cm/s] nN L 0 10 20 30 40 50 60 70 80 90 100 110 120 Reduced distance, R Figure 6. Graphic survey of soil oscillation law curve in the Kovilovaéa Open Pit. e Model ...
... Table 1. Table 1. Survey of blasting parameters and measurement results in the Veliki Krivelj Open Pit. No. Blasting r (m) Q (kg) R vt (cm/s) vv (cm/s) vl (cm/s) vrez (cm/s) 1 I 5.0 0.1 10.7722 0.4200 0.9300 1.1400 1.5300 2 I 6.0 0.1 12.9266 0.3000 0.6000 1.0500 1.2460 3 I 7.0 0.1 15.0810 0.2400 0.4000 ...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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Mineralogical and physicochemical characterization of bentonite clay from Svrljig, Serbia
Maja Milošević, Bojan Kostić (2022)... try determined that the composition corresponds to a high content of montmoril- lonite clay with peaks at 3620 cm–1, 3420 cm–1, 1632 cm–1 and 1018 cm–1. The peaks at 1444 cm–1 and 873 cm–1 correspond to carbonate minerals, although in a very small quantity. X-ray diffraction indicates that the bentonite ...Maja Milošević, Bojan Kostić. "Mineralogical and physicochemical characterization of bentonite clay from Svrljig, Serbia" in Abstracts XXII International Congress of the Carpathian Balkan Geological Association (CBGA), September 7–11, 2022 Plovdiv, Bulgaria, Софиа : Геологически институт „Акад. Страшимир Димитров“ (2022)
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Pre-failure deformation monitoring as rockfall prediction tool
... turned out to be very active, requiring more than twice-a-year field visits and provided cm displacements within two years of acquisition. They establish the detectable rockfall deformation threshold of 6 cm. They aligned with the Rosser et al. [2] methodology of comparing “zero”, i.e., the reference ...
... with between- sequence comparisons. In all analyses, cloud-to-cloud absolute changes above 0.5 cm were considered significant and interpreted as displacement. It is likely that values below this 0.5 cm threshold are affected by scanning errors, presence of vegetation, and other noise, which is why ...
... largest X-axis displacement of about 40 cm. It contributes little to the total rockfall product 2013-2019 (figure 4d), but its cross-section (figure 5d-e) suggest another important bulging in respect to 2016 sequence, equaling 0.0127 m (0.6297-0.6170 m) or 1.3 cm, which remains the upper threshold for ...Miloš Marjanović, Biljana Abolmasov, Zoran Berisavljević, Marko Pejić, Petko Vranić. "Pre-failure deformation monitoring as rockfall prediction tool" in IOP Conference Series: Earth and Environmental Science, IOP Publishing (2021). https://doi.org/10.1088/1755-1315/833/1/012197
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Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings
... 70 10 of 18 Table 1. Survey of blasting parameters and measurement results in Majdanpek open pit. No. Blasting r (m) Q (kg) R vt (cm/s) vv (cm/s) vl (cm/s) vrez (cm/s) 1 I 5.0 0.1 10.7722 0.700 0.900 1.150 1.6194 2 I 6.0 0.1 12.9266 0.300 0.925 1.150 1.5060 3 I 7.0 0.1 15.0810 0.255 0.540 0.850 1 ...
... 70 10 of 18 Table 1. Survey of blasting parameters and measurement results in Majdanpek open pit. No. Blasting r (m) Q (kg) R vte(cm/s) vy (cm/s) — v; (cm/s) Vrez (cm/s) 1 I 5.0 0.1 10.7722 0.700 0.900 1.150 1.6194 2 I 6.0 0.1 12.9266 0.300 0.925 1.150 1.5060 3 I 7.0 0.1 15.0810 0.255 0.540 0.850 1 ...
... for models 1, 2 and 3. Table 3. Survey of recorded and calculated rock mass oscillation velocities for models 1, 2 and 3. No. R vr (cm/s) vi1 (cm/s) vi2 (cm/s) vi3 (cm/s) vr − vi1 vr − vi2 vr − vi3 1 10.7722 1.6194 1.8821 1.9200 1.8043 −0.2627 −0.3006 −0.1849 2 12.9266 1.5060 1,3475 1.3686 1.3200 0 ...Suzana Lutovac, Branko Gluščević, Rade Tokalić, Jelena Majstorović, Čedomir Beljić. "Models of Determining the Parameters of Rock Mass Oscillation Equation with Experimental and Mass Blastings" in Minerals, Basel : MDPI AG, Basel, Switzerland (2018). https://doi.org/10.3390/min8020070
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Збирка задатака из Механике 1 и Отпорности материјала
Aна Петровић, Инес Гроздановић (2023)... „}7 n /d) ” 4 cm |_j 2cm __ 2cm ., 6 HeO BeJIHKH npaBoyraoHMHK 1 143 8cm Cnuka 5.24 flonoxaj anasHux mexuuiHux oca u enurce uHepuuje, noripeuHu ripecek Hocaua A= 8·4| – 2·2| = 28 cm? _(8-4):0|, – (2-2) 1| _ Xc 58 —0,143 cm (8:4)·0|, – (2:2)·1la Jc 28 —0,143 cm ı _|B:2 2:23 MNIO ...
... MNIO 12 = 36,762 cm# 83 23 L =|__- _|__- O ele- |p = 164,762 cm? I = [0 + (8 · 4)(0,143)(0,143)]|, — [0 + (2 · 2)(1,143)(1,143)]|> = —4,571 cm+ 158 CwMuuLaHbbe Cnuka 6.5 Tlocma6eka 3a0đamka, uimar aHkepucaH rnoMohy knuHa Ha Cnuuu 6.5 knuH je auipadbupaH. Ha 6v ce pa3yMena dpM3MKapHOCT ...
... HaupTaTM mvjarpaw, pacnonene akcMjanHMXx cMna, noMepaMba, HamoHa M npoBepuru uBpcrohy urTana ako je naro: P= 50kN, 4 = 10cm?, og = 160 MPa = 16—. cm 48 AkcujjaniHo Haripe3atbe 2A 2A Cnuka 2.7 Tlocmaeka 3a0amka, akcujaJHo HaripeaHym cmereHacmu uimar ŽXi=O=4P—8P+6P—XA X,A=2P Lleo urran ...Aна Петровић, Инес Гроздановић. Збирка задатака из Механике 1 и Отпорности материјала, Београд : Универзитет у Београду, Рударско-геолошки факултет, 2023
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Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics
Agate veins and nodules occur in the Lece Volcanic Complex (Oligocene-Miocene) situated in the south of Serbia and occupying an area of 700 km2. This volcanic complex is composed predominantly of andesites, with sporadic occurrences of andesite-basalts, dacites and latites, and features agate formations that have been very little investigated. This study focuses on five selected agate occurrences within the Lece Volcanic Complex, employing optical microscopy, scanning electron microscopy (SEM), X-ray powder diffraction analysis, inductively coupled plasma mass spectrometry ...Zoran Miladinović, Vladimir Simić, Nenad Nikolić, Nataša Jović Orsini, Milena Rosić. "Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics" in Minerals, MDPI AG (2024). https://doi.org/10.3390/min14050511
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Mechanosynthesis and structural characterization of nanocrystalline Ce1–Y O2– (x=0.1–0.35) solid solutions
Martin Fabián, Bratislav Antić, Vladimír Girman, Milica Vučinić-Vasić, Aleksandar Kremenović, Shigeru Suzuki, Horst Hahn, Vladimír Šepelák (2015)A series of nanostructuredfluorite-type Ce1–xYxO2–δ (0rxr0.35) solid solutions, prepared via highenergy milling of the CeO2/Y2O3mixtures, are investigated by XRD, HR-TEM, EDS and Raman spectroscopy. For thefirst time, complementary information on both the long-range and short-range structural features of mechanosynthesized Ce1–xYxO2–δ, obtained by Rietveld analysis of XRD data and Raman spectroscopy, is provided. The lattice parameters of the as-prepared solid solutions decrease with increasing yttrium content. Rietveld refinements of the XRD data reveal increase in microstrains in the host ceria ...Martin Fabián, Bratislav Antić, Vladimír Girman, Milica Vučinić-Vasić, Aleksandar Kremenović, Shigeru Suzuki, Horst Hahn, Vladimír Šepelák. "Mechanosynthesis and structural characterization of nanocrystalline Ce1–Y O2– (x=0.1–0.35) solid solutions" in Journal of Solid State Chemistry, Elsevier BV (2015). https://doi.org/10.1016/j.jssc.2015.06.027
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Optimizacija parametara reza rotornog bagera pri otkopavanju materijala sa povećanom čvrstoćom
Saša D. Bošković (2016-09-09)Otkopavanje materijala rotornim bagerom je veoma sloţen fiziĉko-mehaniĉki proces. Pokazatelji efektivnosti tog procesa zavise od velikog broja raznovrsnih ĉinilaca od kojih se posebno mogu istaći: fiziĉko-mehaniĉke karakteristike materijala koji se otkopava, reţim rada bagera i izbor tehnoloških parametara bloka, odreska i reza, geometrije vedrica i zuba itd. Poseban problem se javlja kod otkopavanja materijala povećane ĉvrstoće, što je ĉest sluĉaj na našim površinskim kopovima. Dimenzionisanje specifiĉne sile kopanja bagera prema manjim masama izuzetno ĉvrstog materijala je neracionalno i rešenje ...rotorni bager, parametri reza, otpor na kopanje, dinamika bagera, kapacitet, optimizacija, specifična potrošnja energije... debljine 10 cm, 15 cm i 20 cm i širine odrezaka – 16 cm, 24 cm i 30 cm. Slika 8.3. Specifična potrošnja energije za debljinu reza 10 cm i širine odrezaka 16 cm (1), 24 cm (2) i 30 cm (3) Slika 8.4. Specifična potrošnja energije za debljinu reza 15 cm i širine odrezaka 16 cm (1), ...
... 24 cm (2) i 30 cm (3) 151 Slika 8.5. Specifična potrošnja energije za debljinu reza 20 cm i širine odrezaka 16 cm (1), 24 cm (2) i 30 cm (3) Slika 8.6. Specifična potrošnja energije za širinu odreska 16 cm i debljinu reza 10 cm (1), 15 cm (2) i 20 cm (3) ...
... energije za debljinu reza 10 cm i širine odrezaka 16 cm (1), 24 cm (2) i 30 cm (3) ......................................... 150 Slika 8.4. Specifiĉna potrošnja energije za debljinu reza 15 cm i širine odrezaka 16 cm (1), 24 cm (2) i 30 cm (3) .................. ...Saša D. Bošković. "Optimizacija parametara reza rotornog bagera pri otkopavanju materijala sa povećanom čvrstoćom" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-09-09)
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Definisanje geotehničkih karakteristika terena za potrebe izgradnje stanice za snabdevanje gorivom “OMV” u Trsteniku
Milica Dutina (2024)U ovom Završnom radu prikazana su istraživanja na osnovu kojih su urađeni grafički dio, proračun nosivosti i proračun analize slijeganja terena za potrebe izgradnje benzinske stanice sa pratećim objektima. Detaljno je analiziran prodajni objekat,čelični rezervoar za gorivo i znak. Za proračun graničnog opterećenja korišćena je metoda Mayerhofa, dok je analiza slijeganja urađena Konsolidacionom metodom slijeganja za prodajni objekat i čelični rezervoar za gorivo, a za temelj znaka po principu slijeganja i rotacije krutih temelja - Gorbun Posadov. Sve dobijene ...terenska istraživanja, laboratorijska ispitivanja, geotehnička istraživanja, geotehnički model terena, osnovne tehničke karakteristike, analiza slijeganja, proračn nosivosti... 5 Sc s. = 0.8574 cm Slijeganje u tački B =——·1.3+ 315 9500 33000 se = 0.00164 + 0.000429 = 0.00207 · 4.5 Sc s. = 0.207 cm c) ZNAK Q=376.21 kN Mi = 187.35 kN/m M = 9.70 kN/m Es = 30 MPa Epr = 7.5 MPa v=0.3 BxL=2.4x3.0m Epr ·1.3 + Epš:4.5 _7.5-1.3+30:4,5 E= = = 24.90MPa ...
... SLIJEGANJE U CENTRIČNOJ SLIJEGANJE U UGAONOJ TAČKI “A” TAČKI “B” Čelični 0.652 cm 0.165 cm rezervoar za gorivo Prodajni 0.574 cm 0.207 cm objekat TAČKA 1 TAČKA 2 TAČKA 3 TAČKA 4 Znak 0.564 cm 0.262 cm 0.244 cm 0.461 cm 35 6. ZAKLJUČAK Ovaj Završni rad na temu “Definisanje geotehničkih ...
... 24960 2,43 tg0, = sm» = tg0, š = 0.000078 · 1.2 =0.000094 m = 0.0094 cm – _ Ukupno slijeganje temelja Sı = si+ smi + sm:= 0.564 cm s = si- sm; + sm: = 0.262 cm sa = si- smi – sm: = 0.244 cm sa = si+ smi; – sm:= 0.461 cm O0pasau 1 H3JABA O AYTOPCTBY J3ABPII(IHOT PAJIA Hwe H rpe3uMe cryneHra ...Milica Dutina. Definisanje geotehničkih karakteristika terena za potrebe izgradnje stanice za snabdevanje gorivom “OMV” u Trsteniku, 2024
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Doprinos rešavanju problema izbora i određivanja osnovnih parametara rudarskih radionica u podzemnoj eksploataciji
Slobodan Luković (1979)Slobodan Luković. Doprinos rešavanju problema izbora i određivanja osnovnih parametara rudarskih radionica u podzemnoj eksploataciji, Beograd:Rudarsko-geološki fakultet, 1979
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Ekonomsko-matematička optimizacija tehnologije otkopavanja rezanjem sa posebnim osvrtom na proizvodno-tehničke uslove eksploatacije u rudnicima Rembas"-a"
Dušan Gagić (1979)Dušan Gagić. Ekonomsko-matematička optimizacija tehnologije otkopavanja rezanjem sa posebnim osvrtom na proizvodno-tehničke uslove eksploatacije u rudnicima Rembas"-a", Beograd:Rudarsko-geološki fakultet, 1979
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Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine
... Table 3 - Survey of recorded and calculated soil oscillation velocities for models 1 and 2 NO R vr [cm/s] vi1 [cm/s] vi2 [cm/s] vr- vi1 [cm/s] vr- vi2 [cm/s] 1 45.0858 0.2104 0.2740 0.2463 -0.0636 -0.0359 2 38.7521 0.4228 0.3319 0.3082 +0.0909 +0.1146 3 39.4137 0.3922 ...
... Table 2 - Survey of blasting parameters and measurement results NO Blasting MM r [m] Q [kg] R vt [cm/s] vv [cm/s] vl [cm/s] vrez [cm/s] 1 I MM – 1 256.90 185.0 45.0858 0.117 0.136 0.110 0.2104 2 I MM – 2 220.81 185.0 38.7521 0.199 0.296 0.227 0.4228 3 I MM – ...
... Sadovski is given in the form: 3 n r v K Q (1) where there are: v - velocity of soil oscillation [cm/s], K - a coefficient conditioned by soil characteristics and blasting conditions determined by terrain surveying, n - the exponent, conditioned by ...Suzana Lutovac, Sanja Bajić, Marina Ravilić, Radmila Gaćina. "Parameter determination of soil oscillation law using quotient of the relative growth increments of oscillation velocity and reduced distances at “Nepričava“ open pit mine" in Underground Mining Engineering, Belgrade : University of Belgrade, Faculty of Mining and Geology (2015). https://doi.org/10.5937/podrad1526009L