Претрага
779 items
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Daljinsko merenje temperature na bušotinskom cevovodu
Aleksa Petrović (2024)Ovaj diplomski rad analizira daljinsko merenje temperature na bušotinskim cevovodima, koje je od velike važnosti za kontrolu i nadzor nad industrijskim procesima posebno u ekstremnim uslovima kao što su visoke temperature i pritisci u bušotinama. Opisane su različite vrste temperaturnih senzora, kao što su termoparovi, bimetalni i otpornički termometri, kao i senzori na bazi optičkih vlakana, koji se primenjuju za kontinualno merenje temperature duž cevovoda u realnom vremenu. Daljinsko merenje temperature omogućava pravovremeno otkrivanje curenja i nepravilnosti, što je ...temperatura, daljinsko merenje temperature, bušotinski cevovodi, DTS sistemi, infracrveni senzori, bežične mreže... Anders Celzijus je 1742. godine predložio ovu skalu, postavivši 0C kao tačku ključanja, a 100%C kao tačku mržnjenja vode. Kasnije Je ova skala inverzno postavljena, gde je 0"C tačka mržnjenja, a 100%C tačka ključanja vode. 3. Farenhajtova skala (?F): -Razvijena je od strane nemačkog fizičara ...
... preciznost u merenju i koristi platinaste otporne termometre za interpolaciju između fiksnih tačaka. Celsius Kelvin Fahrenhcit C=(*F-32)/1.8 K="C+273.15 F=(1.8x*C)+32 100 373.15 212 vrelište vode 10 0 10 0 18 0 , 0 32 ledište vode l l l Slika 3 Razlike u temperaturnim skalama Tokom ...
... su Jednostavnom relacijom: t//C=T/K-—273.15, gde je t temperatura u stepenima Celzijusa, a T temperatura u kelvinima. 2. Farenhajtova i Celzijusova skala -Za prelazak sa Farenhajtove na Celzijusovu skalu koristi se formula: t//C=(t/7F—32)x(5/9), gde je t//C temperatura u stepenima Celzijusa ...Aleksa Petrović. Daljinsko merenje temperature na bušotinskom cevovodu, 2024
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Geotechnical zoning of the terrain along the first section of E-80 highway in Serbia – SEETO route 7
Part of E-80 highway that passes through Serbia (from the city of Nis to the administrative border Merdare) is 77 km long. The highway is divided into two sections: the first from Nis to Plocnik (39.4 km long) and the second from Plocnik to the administrative border with Kosovo. The route is designed through a typical plain and hilly terrain in which different geological units are dominant: crystalline schists, neogene sediments of foothills and quaternary sediments in the valley ...... are generally divided into three basic categories. In this way, the following were identified: A - „favourable“, B - „conditionaly favourable“ and C - „unfavourable“ sections, which are related to the complexity of the construction of planned structures on the highway route. RÉSUMÉ: Une partie ...
... sont généralement divisés en trois catégories. Ainsi, nous identifions : A - des sections „favorables“, B - des sections „généralement favorables“ et C - des sections „défavorables“, liées à la complexité de la construction des structures prévues le long de la trace de l’autoroute. Keywords: Highway; ...
... geological limitation map, zoning of the terrain was performed into: A-terrains with minimal limitations, B-terrains with minor limitations and C-terrains with larger limitations (Figure 7). A - terrains with minimal limitations are favourable and stable in natural conditions. These terrains ...Dragoslav Rakić, Zoran Berisavljević, Irena Basarić, Snežana Bogdanović, Jovana Janković. "Geotechnical zoning of the terrain along the first section of E-80 highway in Serbia – SEETO route 7" in Proceedings of the XVII European Conference of Soil Mechanics and Geotechnical Engineering ECSMGE-2019, Reykjavik, Iceland, 1-6. 09. 2019., ISSMGE, ECSMGE-2019 (2019). https://doi.org/10.32075/17ECSMGE-2019-0393
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Determining the Availability of Continuous Systems at Open Pits Applying Fuzzy Logic
This work presents a model for determining the availability of continuous systems at open pits by applying fuzzy logic and fuzzy inference systems. The applied model was formed by the synthesis of independent partial indicators of availability. The model is based on an expert system for assessing the availability of continuous mining systems. The availability of the system, as a complex state parameter, is decomposed into the partial indicators, reliability, and convenience of maintenance, and the fuzzy compositions, used ...системи, континуални систем експоатације, површински коп, рударство, расположивост, фази логика, max–min композиција, min–max композицијаMiljan Gomilanović, Miloš Tanasijević, Saša Stepanović. "Determining the Availability of Continuous Systems at Open Pits Applying Fuzzy Logic" in Energies, MDPI AG (2022). https://doi.org/10.3390/en15186786
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Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides
Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović (2021)... University of Belgrade, Faculty of Mining and Geology, Belgrade, Serbia A R T I C L E I N F O Keywords: Analogue modelling Strain partitioning Strike-slip Indenter geometry Cerna and Timok faults system A B S T R A C T Large-scale strike-slip faults are associated with significant strain ...
... a change in fault dip angle, from sub-vertical in the north to steeply eastward-dipping in the south (e.g., compare cross-sections a-a’, b-b’ and c-c’ in Fig. 3g), consistent with a southward increase of the reverse component of movement (Fig. 3g). Overall, the deformation zone gets wider south- ...
... (i.e., maximum absolute Hencky strains). c) Interpreted top-view photo at the end of the experiment. d) Cumulative strain type map at the end of the experiment. Strain plots in Fig. 4b and d are overlain with visually interpreted structures from Fig. 4a and c (grey lines). Strain colour legend corresponds ...Nemanja Krstekanić, Ernst Willingshofer, Taco Broerse, Liviu Matenco, Marinko Toljić, Uroš Stojadinović. "Analogue modelling of strain partitioning along a curved strike-slip fault system during backarc-convex orocline formation: Implications for the Cerna-Timok fault system of the Carpatho-Balkanides" in Journal of Structural Geology, Elsevier BV (2021). https://doi.org/10.1016/j.jsg.2021.104386
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Примена ПСП пумпи за експлоатацију вискозних флуида
Алекса Трифуновић (2024)Производња парафинске нафте се током историје одвијала уз помоћ дубниских клипних пумпи, све до појаве ПСП система који су показали боље каратеристике и већу ефикасност. Функционални дизајн пумпе омогућава производњу вискозних и абразивних мултифазних флуида, уз ниска капитална улагања. У раду је анализирана проблематика рада укључују губитке протока флуида, производњу песка, оштећење клипних шипки и тубинга и сам притисак на дну бушотине. Рађена је студија случаја за нафно лежиште „М“ у коме је приказан цео производни век почевши од ...... TycraHa, kg/m3 Bpoj kg/m3 Ha 15"C 23 37 907,0-934,0 924,0 Ha 20% 23 37 905,0-931,0 921,0 BHckKosHocT, mPas gHa 20% / / / / Ha 50% 27 50 20,6-415,23 203,6 Moznekyicka Maca(g/mol) 9 17 320,25-424,36 394,38 Tauka crubaBaba, "C 30 46 11,0-37,0 24,71 Tauka naJbeba, *C 21 32 30,0-134,0 71,41 MaceHu ...
... IIpHTHcaK TeMIepaTypa (M) (bar) (“C) „M 984,00 (-905,28) 108,6 65,6 « Ta6ezna 14 JicxxaniHu ripaTHcak H TeMrIepaTypa y nexHnrry „M“ HaQrHo-racHor noJjba „MM“ JlexxHmrHui ripHTHcak y Jcokumrry “M” je y HHBOy XHJIpOCTaTCKOT, a TeOTEpMaJIHH TpajiHjeHT je 5,55 C/100m. VcpBojeHH HOdUCTHH JICKHMIHIHHM ...
... KapakTepHcTMHKa Jexumra H Tecra 0yOpePba eJ_1aCTOMCpa. Ha ocHOoBy OyHIOTHHCKHX HOJlATaKA, JIOCTyIHOCTH OTHIpeMC H cBajtyanje c(DeKaTa IIpHMeHec (TeEXHO- ČKOHOMCKH c(bekTH), H3pabyje ce MaTeMaTHuKH MOJIĆJI H CHMyJanuja pajla OIIDeMe. V cknany ca craHnap/noM ISO 15136 „progressing cavity pump systems ...Алекса Трифуновић. Примена ПСП пумпи за експлоатацију вискозних флуида, 2024
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Распоред минских бушотина код израде хоризонталних и косих подземних просторија
Јеремија Баралић (2024)Овај рад бави се анализом и прорачуном расподеле минских бушотина приликом израде хоризонталних и косих подземних просторија у оквиру рударских операција. Главни циљ рада је да пружи јасне смернице за ефикасно и безбедно извођење бушаћко-минерских радова у различитим геолошким условима, уз посебан акценат на оптимизацију расподеле бушотина и прорачун потребне количине експлозива. У раду је детаљно обрађено неколико кључних аспеката: врсте минских бушотина (заломне, помоћне и периферне), фактори који утичу на њихов распоред, као и методе за прорачун оптималне ...... mocHMemHma TNIO c(DbHKaCHOCT MHHHPaMba H CTaOHJIHOCT CTeCHCKEC MaCe. • „MHsapaayHaBaMe noTpeOHe KOJIHUHHE CKCIIJIO3HBa 3aBHCH OJU • Bpcre creHe — CreHe ca BehoM uBpcrohoM 3axTeBajy Behy KOJIHUHHYy CKCIIIO3HBa TNIO jJeJUMHHHIIH 3aHpeMHHc. Ja UdBDpCTC CTeHC, moTpeOHa je Beha eHeprercKa c(bHKaCHOCT ...
... (bopMyia 3a H3pauyHaBaMbc KOJIHUHHČ CKCTIIJIO3HBa y 3aBHCHOCTH OJ BpCTe CTeHe H yCJIOBa MHHHPaMba. Takolje je pa3MorpeHa yJIOra CJOOOHMX NHOBpHIHHa y c(bMKaCHOM oOcMOOaDamy HamoHa y CTEHCKOJ MaCH, IIITO Je IIpeCy)IHO 3a OCTBapHBaHbe KOHTpOJIHCAaHOT JIOM4. I naBHu peyyarrarH pajta mokayyJy Ja rpaBunaH ...
... JbyJICKHX JIeJIATHOCTUM, JaHac ce CyoOuaBa Ca CBC CJIO)KCHHJHM H343OBHMAa yCJIC)i HeHIpeKHJiHe IIOTpa)KMbe 3a MHHCPaJIHHM pecypcHMa H INOTpeOOM 3a c()MKaACHMM H Oe3OeMHMM pajHHMM riponecHMa. V OKBHpy HOJeMHE ecKcIIOATANHJe, H3pajla JaMCKMX NHNpocTopHja H TIpHMeHa OyHTauKO-MHHCpCKHX TeXHHKa HTpajy ...Јеремија Баралић. Распоред минских бушотина код израде хоризонталних и косих подземних просторија, 2024
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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
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Old or New, We Repair, Adjust and Alter (Texts)
Cvetana Krstev, Ranka Stanković (2020)U ovom radu predstavljamo kako se e-rečnici i kaskade transduktora konačnih stanja implementirani u alatu Unitex mogu koristiti za rešavanje tri problema transformacije teksta: ispravljanje tekstova nakon OCR-a, vraćanje dijakritičkih znakova i prebacivanje između različitih jezičkih varijanti.ispravka teksta, OCR greške, restauracija dijakritika , jezičke varijante, elektronski rečnik, transduktori konačnih stanja... ASCII character set, and affects five letters: š, d, č, ć and ž. As a result, some letters or letter groups become ambiguous: – c – can stand for č and ć (and c); – z – can stand for ž (and z ); 5 The example text is from the novel by Lazar Komarčić “One devastated mind” (Jедан разорен ум) ...
... were produced for English (one of the reasons was its notorious “illogical” spelling), and dealt Infotheca Vol. 19, No. 2, December 2019 61 Krstev C., Stanković R., “Old or new, we repair . . . ”, pp. 61–80 with errors produced by humans (typographic errors, author’s ignorance) or machines during ...
... letters, 1 For the project presented in this section we used ABBYY FineReader 12 Pro- fessional. Infotheca Vol. 19, No. 2, December 2019 63 Krstev C., Stanković R., “Old or new, we repair . . . ”, pp. 61–80 punctuation marks and digits. OCR errors can also produce valid words or non-valid words. ...Cvetana Krstev, Ranka Stanković. "Old or New, We Repair, Adjust and Alter (Texts)" in Infotheca, Faculty of Philology, University of Belgrade (2020). https://doi.org/10.18485/infotheca.2019.19.2.3
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Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)
Mt. Avala is located on the southern margin of the Pannonian basin (SPB), a border zone between the uplifted morphostructures of the Dinarides and Carpathian-Balkanides. Similar to the Pannonian basin, tectonostratigraphic evolution of the Mt. Avala area during the last 23 Ma has is characterized by syn- and post-rifting processes as well as tectonic inversion. Here, we present the results of field investigations of the Miocene‒Pliocene dynamics that led to different spatial positions of the same stratigraphic units (e.g. ...... conglomerates (c), semi-rounded pebbles of the quartzites and sandstones (d). G eo lo g ia C ro a ti ca Geologia Croatica 72/2114 Figure 5. The Upper Badenian sands: A well-known Badenian sand section in the upper part of the Rakovica stream (a, b), Persistrombus coronatus (DEFRANCE) (c) and, typical ...
... stream valley (b), a detail of reddish conglomerates, light-brown coarse-grained sandstones in intercalation with green silt and clay (c, d). G eo lo g ia C ro a tica Rundić et al.: Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak ...
... laminated sandstones (a, b), thin interbeds of platy limestone and marls (c) Ervilia dissita EICHWALD (d). Figure 9. The Lower Pannonian sandy marl (a), sandy marls steeply dipping towards the southeast (b). G eo lo g ia C ro a ti ca Geologia Croatica 72/2116 (Fig. 7), an outcrop of the Lower ...Ljupko Rundić, Meri Ganić, Slobodan Knežević, Dejan Radivojević, Miloš Radonjić. "Stratigraphic implications of the Mio-Pliocene geodynamics in the area of Mt. Avala: new evidence from Torlak Hill and Beli Potok (Belgrade, Serbia)" in Geologia Croatica (2019). https://doi.org/10.4154/gc.2019.11
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Geotehnički uslovi izgradnje nadvožnjaka "Balajnac" na autoputu E-80 deonica: Niš - Merošina
Dragoslav Rakić, Nikola Božović (2024)U sklopu prve deonice autoputa E-80 Niš – Merošina, izgrađen je nadvožnjak u zoni sela Balajnac koji je oslonjen na tri stubna mesta na međusobnom rastojanju od oko 26 m. Svaki stub je fundiran na šipovima i to sa predloženim rasporedom od 2 šipa u grupi na međusobnom rastojanju od 3.6 m. U radu su na osnovu izvršenih geotehničkih istraživanja terena, analizirani rezultati nosivosti vertikalno opterećenog šipa prečnika 1.2 m i dužine šipa od L = 23 m. Analiza ...Dragoslav Rakić, Nikola Božović. "Geotehnički uslovi izgradnje nadvožnjaka "Balajnac" na autoputu E-80 deonica: Niš - Merošina" in Peti Srpski kongres o putevima, Beograd, 30-31.05.2024., Beograd : Srpsko društvo za puteve "Via Vita" (2024)
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Photocatalytic Activity of the V2O5 Catalyst toward Selected Pharmaceuticals and Their Mixture: Influence of the Molecular Structure on the Efficiency of the Process
Sanja J. Armaković, Aleksandra Jovanoski Kostić, Andrijana Bilić, Maria M. Savanović, Nataša Tomić, Aleksandar Kremenović, Maja Šćepanović, Mirjana Grujić-Brojčin, Jovana Ćirković, Stevan Armaković (2023)Due to the inability of conventional wastewater treatment procedures to remove organic pharmaceutical pollutants, active pharmaceutical components remain in wastewater and even reach tap water. In terms of pharmaceutical pollutants, the scientific community focuses on -blockers due to their extensive (over)usage and moderately high solubility. In this study, the photocatalytic activity of V2O5 was investigated through the degradation of nadolol (NAD), pindolol (PIN), metoprolol (MET), and their mixture under ultraviolet (UV) irradiation in water. For the preparation of V2O5, facile ...DFT analysis, metoprolol, nadolol, nanomaterial characterization, photocatalysis, pindolol, β-blocker... Figure 2. Refined unit cell parameter values (a = 11.506 (2), b = 4.3708 (6), c = 3.5627 (4) A,V = 179.17 (4) A9) are in good agreement with reference values reported in upper mentioned PDF card (a = 11.5100, b = 4.3690, c = 3.5630 A, V = 179.173 A3). The significant presence of an amorphous compo- ...
... particles were formed with an average diameter of ~70 nm for the sample annealed at 500 "C for 2 h. A similar procedure was conducted by Abdullah et al. [29] with the same surfac- tant: after annealing; at 500 ?C for 4 h, the nanoflakes with thicknesses close to 65–80 nm were obtained. Figure 3. ...
... adjust the pH of the reaction solution to about 4, the diluted acetic acid (C(HaCOOH/Hx»O = 1:1 v/v) was added drop-wise. The final orange solution was placed into a Teflon-lined stainless steel autoclave and kept at 180 ?C for 24 h and then naturally cooled down to room temperature. The orange product ...Sanja J. Armaković, Aleksandra Jovanoski Kostić, Andrijana Bilić, Maria M. Savanović, Nataša Tomić, Aleksandar Kremenović, Maja Šćepanović, Mirjana Grujić-Brojčin, Jovana Ćirković, Stevan Armaković. "Photocatalytic Activity of the V2O5 Catalyst toward Selected Pharmaceuticals and Their Mixture: Influence of the Molecular Structure on the Efficiency of the Process" in Molecules, MDPI AG (2023). https://doi.org/10.3390/molecules28020655
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Quantifying the mass transfer from mountain ranges to deposition in sedimentary basins: Source to sink studies in the Danube Basin–Black Sea system
Matenco Liviu, Andriessen Paul, Avram Corina, Bada Gabor, Beekman Fred, Bielik Miroslav, ter Borgh Marten, Cifci Gunay, Cvetković Vladica, Dinu Corneliu, Dombradi Endre, Dondurur Derman, Ergun Mustafa, Francu Juraj, Fügenschuh Bernhard, Garcia-Castellanos Daniel, Götz Joachim, Horváth Ferenc, Houseman Gregory, Knežević Slobodan, Kovac Michal, Kralikova Silvia, Krijgsman Wout, Kucuk Mert, Legosteva Olga, Lericolais Gilles, Jipa Dan, Maximov Greg, Melinte Mihaela, Minar Jozef, Munteanu Ioan, I.J. Munt, C. Olariu, J.C. Otto, N. Panin, D. Plašienka, Reiser Martin, Rundić Ljupko, M. Rupprechter, Safanda Jan, Schmid Stefan, Schrott Lothar, Schuster Ralf, Starostenko Vitaliy, R.J. Steel, Stephenson Randell, Stovba Sergiy, Sokoutis Dimitrios, Stankoviansky Miloš, Stoica Marius, Stojadinović Uroš, Toljić Marinko, Tomljenović Bruno, ter Voorde Marlies, Wong How Kin (2013)Matenco Liviu, Andriessen Paul, Avram Corina, Bada Gabor, Beekman Fred, Bielik Miroslav, ter Borgh Marten, Cifci Gunay, Cvetković Vladica, Dinu Corneliu, Dombradi Endre, Dondurur Derman, Ergun Mustafa, Francu Juraj, Fügenschuh Bernhard, Garcia-Castellanos Daniel, Götz Joachim, Horváth Ferenc, Houseman Gregory, Knežević Slobodan, Kovac Michal, Kralikova Silvia, Krijgsman Wout, Kucuk Mert, Legosteva Olga, Lericolais Gilles, Jipa Dan, Maximov Greg, Melinte Mihaela, Minar Jozef, Munteanu Ioan, I.J. Munt, C. Olariu, J.C. Otto, N. Panin, D. Plašienka, Reiser Martin, Rundić Ljupko, M. Rupprechter, Safanda Jan, Schmid Stefan, Schrott Lothar, Schuster Ralf, Starostenko Vitaliy, R.J. Steel, Stephenson Randell, Stovba Sergiy, Sokoutis Dimitrios, Stankoviansky Miloš, Stoica Marius, Stojadinović Uroš, Toljić Marinko, Tomljenović Bruno, ter Voorde Marlies, Wong How Kin. "Quantifying the mass transfer from mountain ranges to deposition in sedimentary basins: Source to sink studies in the Danube Basin–Black Sea system" in Global and Planetary Change no. 103, Amsterdam:Elsevier (2013): 1-18. https://doi.org/10.1016/j.gloplacha.2013.01.00
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Properties of fly ash and slag from the power plants
This paper describes the physical, chemical and mineral properties of ash and slag, which were taken from thermal power plants Nikola Tesla A, Nikola Tesla B, Kostolac A and Kostolac B. The knowledge of the mineralogical material composition is important because the type of minerals directly determines the properties of the fly ash and slag and their possible application. Laboratory tests showed that ash and slag samples consist of the following minerals: amorphous materials, quartz, feldspar, mullite, melilite, cristobalite, ...fly ash, slag, physical composition, chemical composition, mineral composition, X-ray diffraction method... 15km. This basin is divided into several fields („A”, „B”, „C”, „D”, „E”, „F”, „G”, „Veliki Crljeni”, „Šopić-Lazarevac”, „Tam- nava Istok”, „Tamnava Zapad”, „Radljevo”, „Zvizdar” and „Ruk- lade”; Fig. 2). Lignite is exploited in fields „C”, „D” and „Tam- nava Zapad”. The D field which is the focus ...
... loss on ignition 1000°C; m – �y ash for month May; j – �y ash for month June; (s) – slag; NT – Nikola Tesla; KO – Kostolac Figure 5. The R module according to PP (m – �y ash for month May; j – �y ash for month June; (s) – slag; NT – Nikola Tesla; KO – Kostolac). G eo lo g ia C ro a ti ca Geologia ...
... ignition 1000 °C; R – module R; AM – the amorphous material; Q – quartz; f – feldspar; M – mullite; Ml – melilite; Cr – cristobalite; He – hematite; pH – pH values; w – humidity of the sample; <2.9 – density of less than 2.9g/cm3; <63μm – fraction of less than 63μm G eo lo g ia C ro a tica Šešlija ...Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić. "Properties of fly ash and slag from the power plants" in Geologia Croatica, Zagreb : Croatian Geological Survey (2016). https://doi.org/10.4154/gc.2016.26
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Geotehnički uslovi izgradnje metro stanice "Francuska" u Beogradu
Lazar Pavlović (2024)Cilj ovog rada je analiza stabilnosti dijafragme, predviđene kao mere za obezbeđenje dubokog iskopa od zarušavanja okolnog tla koji se izvodi na mestu buduće metro stanice “Francuska” koja je planirana u okviru prve faze, prve linije metroa u Beogradu – sekcije „Centar“. U okviru numeričke analize je izvršena analiza stabilnosti konzolne dijafragme kao i dijafragme sa ankerom – slobodno oslonjene dijafragme, kako bi se moglo napraviti poređenje dobijenih vrednosti koje se odnose na dubinu fundiranja koja je potrebna da ...... osnovu sledeće Jednačine: C M k= —·log — t O H, gde je: k — koeficijet filtracije, C – konstanta koja zavisi od dužine ispitivanog intervala (L) i poluprečnika bušotine (r), Ho – statički nivo podzemne vode, Hi - nivo podzemne vode nakon vremena t Konstanta C je sračunata na osnovu sledeće ...
... q (") 20! / / kohezija c (kPa) 22! / / Paramertri čvrstoće na smicanje iz triaksijalnog CU opita ugao unutrašnjeg trenja q (") 26 / / kohezija c (kPa) 39 / / Paramertri čvrstoće na smicanje iz triaksijalnog CD opita ugao unutrašnjeg trenja q (") 29 / / kohezija c (kPa) 29 / / Nedrenirana ...
... q (") 19! / / kohezija c (kPa) 281 / / Parametri čvrstoće na smicanje iz triaksijalnog za stene ugao unutrašnjeg trenja q (") 21 / / kohezija c (kPa) 244 / / Paramertri čvrstoće na smicanje iz triaksijalnog CU opita ugao unutrašnjeg trenja q (") 32 / / kohezija c (kPa) 85 / / Parametri ...Lazar Pavlović. Geotehnički uslovi izgradnje metro stanice "Francuska" u Beogradu, 2024
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Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera
Aleksandra B. Kolarski (2016-08-25)Radio talasi vrlo niskih frekvencija VLF (eng. Very Low Frequency) frekventnog opsega od 3 do 30 kHz, koji se prostiru talasovodom Zemlja-jonosfera (50 -90 km) su, kao što je poznato, efikasni i nezamenljivi u osmatranju pojava u niskoj jonosferi, sa tla...prostiranje talasa vrlo niskih frekvencija, talasovod Zemlja-jonosfera, globalno električno kolo, atmosfersko električno pražnjenje, kratkotrajne svetlosne pojave... Chen, A. B., Lee, Y. J., Lee, L. C. (2002). Observation of sprites over the Asian continent and over oceans around Taiwan. Geophys. Res. Lett., 29(4). doi:10.1029/2001GL013737. Su, H. T., Hsu, R. R., Chen, A. B., Wang, Y. C., Hsiao, W. S., Lai, W. C., Lee, L. C., Sato, M., Fukunishi, H. (2003) ...
... Naelektrisanje olujnih oblaka i ekranizacija Iznad gornje, široko rasprostranjene i pozitivno naelektrisane (oko 100 C) površi olujnog oblaka sa +100 C na visini 15 km i -100 C na visini 5 km, sa +100 MV i -100 MV, trebalo bi da postoji široko rasprostranjeno elektrostatičko polje, (Slika 1.3.3 ...
... koncentracija elektrona. Ukupna količina naelektrisanja Q (C) u zapremini V (m3) je: Q = n∙e, gde je e =1.610-19 (C) količina naelektrisanja elektrona, pa se izraz za ukupnu količinu naelektrisanja svodi na oblik: Q = Ne r 2πd ∙e (C). Moment električnog dipola MQ (Ckm) je: MQ = Q∙d (Ckm) ...Aleksandra B. Kolarski. "Elektromagnetska sprega sistema litosfera-atmosfera-jonosfera" in Универзитет у Београду, Универзитет у Београду, Рударско-геолошки факултет (2016-08-25)
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Proračun osnovnih mehanizama na rotornom bageru ShRs 1300 na PK Polje E
Luka Nikolić (2024)Površinska eksoloatacija ležišta mineralnih sirovina, a posebno uglja (lignita) vrši se primenom različitih rudarskih mašina. U zavisnosti od tipa ležišta, rudarsko-geoloških uslova, ekonomske analize i sl. koriste se sistemi sa kontinualnim ili diskontinualnim načinom rada.Kod kontinualnih sistema, primenjuju se kompleksne rudarske mašine kod kojih se proces odvija neprekidno odnosno bez ciklusa utovara, transporta i odlaganja i najčešće rade u sve tri smene. Rotorni bageri i bageri vedričari, transporteri sa gumenom trakom, odlagači ili deponijske mašine čine tkz BTO ili ...... 750-1500 1500-5040 Moment na rotornom točku 75-2200 2000-7000 4500-12000 [kNm] Veliki bageri Tip C Bageri sa C ramom Tip B Kompaktni bageri Tip A Slika 8 Tipovi rotornih bagera A,B,C Diplomski rad Univerzitet u Beogradu – Rudarsko-geološki fakultet 3.2.1. Konstrukcija rotornih bagera ...
... ag aakakaaoi 38 PA .NN b c:1 OVAAAAARAAAAAARRARARAARARARAAARARRAARARRARRAAARARAARRRRRRRRRRRRARRARRRORRRRRRRRRRARRORARARAWRRRRRARRROAR 41 4.7. Elektro pogon na bageru ... a aaaaaaaaeaaaaeaaeaaaeaaaaeaaaaaaeaea ag aakaataoi 42 4.8. Radna masa i pritisak na tlo ......c..aaaaaaaaaaaaaa a eanaaaaaa ...
... Polje D i Polje B završena planirana eksploatacija, dok se kop Polje C implementiralo u kop Polje E. Polje E je projektovan u novim, eksploatacionim granicama, ali je i istovremeno delom i nastavak površinskog kopa Polje B/C kao jednog od najstarijih površinskih kopova Kolubare. Lignit koji se ...Luka Nikolić. Proračun osnovnih mehanizama na rotornom bageru ShRs 1300 na PK Polje E, 2024
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Анализа специфичних услова циркулације карстних подземних вода врела Градишта
Јована Јанковић (2024)Карстно врело „Градиште“ налази се у истоименом селу, и користи се у сврху водоснабдевања града Пирота и околних села. Врело је настало на контакту неогених творевина Пиротске котлине и карстног масива Старе планине. Карстна издан сама по себи је хетерогена и анизотропна те се тешко успостављају правила и принципи циркулације подземних вода. О специфичности циркулације предметног врела најбоље говори анализа изотопске методе где је добијена старост воде и установљено постојање полумладих вода које залежу дубље у односу на младе ...... pa Ba3myxa MH3aHocHma 11,8 ?C. MakcuMaiiHa cpepiPba rojHia TeMIIepaTypa Bay3lyxa H3HocHua je 13,29C 2019. ronuHe, OK Je MHHHMajIHa cpeJipberoJuHma TeMIIepaTypa H3HocHiuma 10,0 *C 1991. ronmaHe. Hajronnuja Mecem OuMo je Jym 2012. romaHe ca HmpoceuHo H3MepeHMx 26,4"C, a HajxaanHujH JaHyap 2017 ...
... cp . Me ce uH a (% ) Tc p M e c e u H o [{* C} = o o 15,0 40,0 10,0 30,0 20,0 50 0,0 JAH OEB MAP ATIP MAJ JyH Jy/! ABT CET OKT HOB NEU Meceu o o Cuuuka 2.4. Ynopeonu Oujazpau cpeotbeMeceunux 6epe0Onocmu menMnepamype 6a30yxa (y "C) u penamuene anaozichocmu 6a30yxa (y ...
... TOJMHHa aaOeJe»xeHe cy Janyapy 2016. romaHe (-1,2 *C), a HajBHme TOKOM jyana 2021. romane (22,8 "C). Hajronznnja je Oama 2019. romaHa, a HajxntanHuja 2016. a 2021. ronaHa. Teđ0na 2.7. IIpeone0 cpeotbe Meceutux u cpeotbe coOuuuibux meMnepamypa 6a30yxa ("C) saa nepuoo 2013-2022. eodune, wemeopo.touuka ...Јована Јанковић. Анализа специфичних услова циркулације карстних подземних вода врела Градишта, 2024
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Structural dissymmetrization of optically anisotropic Grs64±1Adr36±1Sps2 grandite from Meka Presedla (Kopaonik Mt., Serbia)
In this paper, grandite core with Grs64±1Adr36±1Sps2composition was crystallographically studied. This core represents zone A of the macroscopically visiblefive A–E zones of the optically anisotropic Grs58–64 Adr36–42Sps2 grandite. The applied procedure includes the detailed analysis of the powder diffraction patterns, and the Rietveld refinements of the crystal structures in a series of 18 space groups and two mixtures, which were followed by the comparative analysis of the R-values, site occupancy factors, and the bond lengths and angles. Synthesis of all ...Pavle Tančić, Aleksandar Kremenović, Predrag Vulić. "Structural dissymmetrization of optically anisotropic Grs64±1Adr36±1Sps2 grandite from Meka Presedla (Kopaonik Mt., Serbia)" in Powder Diffraction, Cambridge University Press (CUP) (2019). https://doi.org/10.1017/S0885715619000897
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Water in the Alluaudite Type-Compounds: Synthesis, Crystal Structure and Magnetic Properties of Co3(AsO4)0.5+x(HAsO4)2−x(H2AsO4)0.5+x[(H,□)0.5(H2O,H3O)0.5]2x+
In this study, a new cobalt arsenate belonging to the alluaudite supergroup compounds with the general formula of Co3(AsO4)0.5+x(HAsO4)2−x(H2AsO4)0.5+x[(H, )0.5(H2O,H3O)0.5]2x+ (denoted as CoAsAllu) was synthesized under hydrothermal conditions. Its crystal structure was determined by a room-temperature single-crystal X-ray diffraction analysis: space group C2/c, a = 11.6978(8), b = 12.5713(7), c = 6.7705(5) Å, b = 113.255(5)◦, V = 914.76(11) Å3, Z = 2 for As6H8Co6O25. It represents a new member of alluaudite-like protonated arsenates and the first alluaudite-like phase ...супергрупа алуаудита, арсенати прелазних метала, хидротермална синтеза, кристална структура, хидратисани хидрокси-арсенати, стехиометрија, магнетна својстваTamara Đorđević, Ljiljana Karanović, Marko Jagodič, Zvonko Jagličić. "Water in the Alluaudite Type-Compounds: Synthesis, Crystal Structure and Magnetic Properties of Co3(AsO4)0.5+x(HAsO4)2−x(H2AsO4)0.5+x[(H,□)0.5(H2O,H3O)0.5]2x+" in Minerals, MDPI AG (2021). https://doi.org/10.3390/min11121372
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Characterization of bituminite in Kimmeridge Clay by confocal laser scanning and atomic force microscopy
Paul C. Hackley, Jolanta Kus, João Graciano Mendonça Filho, Andrew D. Czaja, Angeles G. Borrego, Dragana Životić, Brett J. Valentine, Javin J. Hatcheries (2022)This work investigates bituminite (amorphous sedimentary organic matter) in Upper Jurassic Kimmeridge Clay source rock via confocal laser scanning microscopy (CLSM) and atomic force microscopy (AFM). These petrographic tools were used to provide better understanding of the nature of bituminite, which has been historically difficult to identify and differentiate from similar organic matter types in source rocks. As part of an International Committee for Coal and Organic Petrology (ICCP) working group, an immature (0.42% vitrinite reflectance), organic-rich (44.1 wt% ...Битуминит, Kонфокална ласерска скенирајућа микроскопија, Mикроскопија атомских сила, Органска петрологија, Термичка зрелостPaul C. Hackley, Jolanta Kus, João Graciano Mendonça Filho, Andrew D. Czaja, Angeles G. Borrego, Dragana Životić, Brett J. Valentine, Javin J. Hatcheries. "Characterization of bituminite in Kimmeridge Clay by confocal laser scanning and atomic force microscopy" in International Journal of Coal Geology, Elsevier BV (2022). https://doi.org/10.1016/j.coal.2022.103927