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Упит dcterms_subject_txt:Boyd-Lawton limit formula

323 items

  • Anisotropic grossular–andradite garnets: Evidence of two stage skarn evolution from Rudnik, Central Serbia

    Bojan Kostić, Danica Srećković-Batoćanin, Petyo Filipov, Pavle Tančić, Kristijan Sokol (2021)
    This paper presents LA-ICP-MS data for garnets from the Rudnik skarn deposit (Serbia), which range from Grs45–58Adr40–52Alm2–3 in the core and Adr70–97Grs2–29Sps1 in the rim displaying anisotropy and zoning. In spite of wide compositional variations the garnets near the end-member of andradite (Adr > 90) are generally isotropic. Fe-rich rims exhibit LREE depletion and flat HREE pattern with weak negative Eu anomaly, including higher As and W contents. On the other side, the Fe-poorer core shows flat REE pattern ...
    grandite, garnets, skarn, Rudnik

  • Mineralogical study of clays from Dobrodo, Serbia, for use in ceramics

    Maja Milošević, Predrag Dabić, Sabina Kovač, Lazar Kaluđerović, Mihovil Logar (2019)
    keramika, glina, Dobrodo, mineralogija, sirovina, Srbija
    ... for the plastic limit and workability of soils. Proceedings Institution of Civil Engineers, 162 (3), 175–185. Barnes G.E. (2013a) An apparatus for the determination of the workability and plastic limit of clays. Applied Clay Science, 80–81, 281–290. Barnes G.E. (2013b) The Plastic Limit and Workability ...
    ... pure kaolinite, but lower CEC values than bentonite clays (>70 mmol 100 g–1). Plasticity and toughness The liquid limit (LL) of the samples varies from 32.4% to 53.6% and the plastic limit (PL) varies from 13.8% to 30.2%. Clays with a plasticity index (PI) <10% are not appropriate for building-related ...
    ... bodies depends on the Fe oxide content, and the limit of 3 wt.% of Fe2O3 has been found to be the value that sepa- rates light from dark firing bodies (Dondi et al., 2014). Fig. 8. Holtz & Kovacs (1981) diagram of the studied samples. LL = liquid limit; PI = plasticity index. Clay Minerals 375 Summary ...

  • Rock slope stability analysis under Hoek–Brown failure criterion with different flow rules

    Svetlana Melentijević, Zoran Berisavljević, Dušan Berisavljević, Claudio Olalla Marañón (2024)
    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 analiza

  • Simple 2D Gravity-density inversion for modeling of the sedimentary basin basement

    Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić, (2019)
    ... removing the joint effect of the sediments with vertical density variations and homogeneous basement of average density contrast. Bouguer slab formula was used in order to calculate the coefficient for the inversion of gravity effect of the basement into lateral density distribution. The procedure ...
    ... procedure was tested using 2D models. Method Infinite horizontal slab is the simplest way to create the model of the basin basement. Bouguer slab formula is applied in order to invert gravity effect of the basement into lateral density distribution: bbb hK2g  , where K is gravitational constant ...
    ... iteration, the value of gb was corrected for the gravity effect of the first model (gm1) and corrected value (gb - gm1) was applied in the formula for density variation of the basement. Results of the new inversion were added to the previously obtained value of density contrast and the next ...

  • The external aggregation Newton's method for solving nonlinear equations and applications

    Marija Paunović, Dejan Ćebić, Nebojša Ralević (2020)
    Њутнов метод, агрегациона функција, ред конвергенције
    ... and f ′(α) , 0. If f (α) = f ′(α) = ... = f (k−1)(α) = 0 and f (k)(α) , 0 for k ≥ 1 then α is of multiplicity k. If the sequence {xn} tends to a limit α such that lim n→∞ xn+1 − α (xn − α)q = C, (2) for some C , 0 and q ≥ 1, then the order of convergence of the sequence {xn} is q and C is known ...
    ... ek−1 n )] + o(ek n) = 1 2 f (k)(α) (k−1)! ek−1 n [ 1 + ( k−1 k )k−1 + ( k+1 k + ( k−1 k )k−1 · k2+k−1 k2 ) dk+1en + o(en) ] . Now, the formula (5) is transformed into xn+1 − α = xn − α − f (xn) A( f ′(xn), f ′(x̃n)) , i.e., en+1 = en − f (xn) A( f ′(xn), f ′(x̃n)) = en − f (k) (α) k! ek ...
    ... + (k) 12 dy re2 + 0(02)] + (Fy re EH! dh yen + O(En)| - w) - w k-1 k+l k-1 fstek!)| + o(et) = 35 ek ee ye + (He (ET EF desien + O(€n)]. Now. the formula (5) is transformed into _a=x,-a-—fon ” AP Xn) of" Fn)” fem) Af! (Xn) Sf Xn) Ma ok ‘| Xn+1 1.€., Cnt41 = Cn 1L+dys1entdys2€2 +0(e? | = en — (k) ...

  • Critical disorder and critical magnetic field of the nonequilibrium athermal random-field Ising model in thin systems

    Svetislav Mijatović, Dragutin Jovković, Sanja Janićević, Đorđe Spasojević (2019)
    Изингов модел, критично понашање, танки системи
    ... values depend on the type and size of the underlying lattice and in the thermodynamic limit (i.e., when the lattice of the given type becomes infinite) tend from above to the critical disorder Rc; in the same limit the width of the transition region of disorder tends to zero [58]. Next, let us name ...
    ... . In the case of equilateral (i.e., L × L × L) cubic lattices the thermodynamic limit is not affected by any combination of such conditions taken along the x, y, and z directions; however, the approach to the limit is the fastest if the all-boundary conditions are closed (CCC). For this reason it ...
    ... result regarding the model behavior on equilateral lattices is that it becomes independent of the choice of boundary conditions in the thermodynamic limit (i.e., when the system size increases to infinity), since the percentage of the spins affected by the different boundary conditions decays [39,40] ...

  • Simple 2D gravity–density inversion for the modeling of the basin basement: example from the Banat area, Serbia

    Ivana Vasiljević, Snežana Ignjatović, Dragana Đurić (2019)
    We have developed a technique to calculate lateral density distribution of the sedimentary basin basement by combining linear gravity–density inversion and 2D forward modeling. The procedure requires gravity anomaly data, depth-to-basement data and density data for the sediments (density–depth distribution). Gravity efect of density variations in the basement was extracted from the total gravity anomaly by removing the joint efect of the sediments with vertical density variations and homogeneous basement of average density contrast (calculated by 2D modeling). Gravity ...
    funkcije raspodele gustine, lateralna raspodela gustine, karta gustine podloge
    ... rocks can vary in the wide range from less than 2.6 × 103 kg/m3 to more than 3.1 × 103 kg/m3, generally, so it is very hard to estimate the upper limit of expected density values. Based on all available data concerning basement formations, the acceptable density range for the results of the grav ...
    ... Gravity effect of the sediments was calculated using depth-to-basement data and density–depth function, based on borehole logging data. Bouguer slab formula was used in order to simplify basement model and calculate the operator for the linear inversion of gravity effect of the base- ment into lateral ...
    ... from the first (direct) inversion results. Infinite horizontal slab is the simplest way to create the model of the basin basement. Bouguer slab formula was applied in order to invert gravity effect of the basement into lateral density distribution: where K is gravitational constant, Δgb is gravity ...

  • Utvrđivanje Bondovog radnog indeksa Pb-Cu-Zn rude rudnika Rudnik

    Jovana Jović (2024)
    Završni rad sa temom ,,Utvrđivanje Bondovog radnog indeksa Pb-Cu-Zn rude rudnika Rudnik” sastoji se iz opšteg i specijalnog dela. OPŠTI DEO sadrži: U opštem delu dato je: Uvod, Geografski položaj i istorijski razvoj rudnika "Rudnik", kratak prikaz geologije ležišta i eksploatacije rude kao i opis tehnološkog procesa flotacije rudnika “Rudnik”. SPECIJALNI DEO sadrži:U specijalnom delu dato je:Cilj istraživanja, teorijske osnove usitnjavanja, Bondov radni indeks, metode ispitivanja uzoraka, uzorkovanje i obrada uzorka; Metode ispitivanja; Rezultati ispitivanja po standardnom Bondovom postupku i po ...
    Bondov radni indeks, standardni postupak, skraćeni postupak, ruda olova, bakra i cinka, rudnik „Rudnik“
    ... kružnom šaržom od 250 % po sledećoj formuli: 8. Izračunati masu novonastalog proseva komparativnog sita po Jednom obrtaju mlina po sledećoj formuli: G, = L LI [g/obrtaju] Nı 9. Izračunati broj obrtaja mlina za drugi eksperiment mlevenja prema sledećoj formuli: C-Z,Y | N, = — [g/obrtaju] ...
    ... proseva komparativnog sita po jednom obrtaju mlina u drugom eksperimentu, po sledećoj formuli: MY . G, => ——— ,[g/obrtaju] N 52 14. iIzračunati broj obrtaja mlina za treći eksperiment mlevenja po sledećoj formuli: _C-Z,Y N -_ . 3 G , [obrtaja| 15. · Dalje se postupak izvođenja ponavlja od ...
    ... brzine za treći eksperiment mlevenja (Nx), prema formuli: n k, = N—hl[R1 + (M – R,)X| – InR» 2 11. Odsevu (R>)iz prvog eksperimenta dodati sveži uzorak mase (M — R). 12. Izračunati broj obrtaja za treći eksperiment mlevenja (Nx), prema formuli: 2,5 In[R, + (M – &,)X| — 1113'5 k M N.=n ...

  • Nonequilibrium athermal random-field Ising model on hexagonal lattices

    Svetislav Mijatović, Dragutin Jovković, Đorđe Spasojević (2021)
    Изингов модел, хексагонална решетка
    ... want to see what happens in thermodynamic limit, but obviously, we are not able to simu- late infinite systems. To this end we try to set some conditions in the system, before the evolution starts, that would mimic the behavior in the thermodynamic limit. This is presented in the next section. In ...
    ... per each value of disorder. We analyzed regular systems as well as the systems with different preset conditions to capture behavior in thermodynamic limit. The superficial insight to the avalanche propagation in this type of lattice is given as a stimulus for further research on the topic of avalanche ...
    ... parameters and exponents. Section IV presents the data gathered on systems with preset initial con- ditions that mimic the behavior in thermodynamic limit. In Sec. V are shown results on avalanche propagation, giving a closer insight of how an avalanche evolves throughout the hexagonal lattice. Last ...

  • Regulacija nivoa tečne faze u vertikalnim separatorima

    Katarina Šoštarić (2024)
    Ovaj diplomski rad bavi se regulacijom nivoa tečne faze u vertikalnim separatorima u industriji nafte i gasa. U radu su istraženi različiti metodi merenja nivoa, uključujući plovke, ultrazvučne i radarske senzore. Radarski senzori su se pokazali kao najefikasniji u teškim radnim uslovima, zahvaljujući njihovoj visokoj preciznosti i pouzdanosti. Rad uključuje teoretski pregled metoda merenja nivoa, detaljno poređenje prednosti i nedostataka različitih senzora, kao i studiju slučaja implementacije radarskog senzora u vertikalnom separatoru. Analiza rezultata i preporuke za buduća istraživanja ...
    Merenje nivoa, Vertikalni separator, Radarski senzori, Ultrazvučni senzori, Industrija nafte i gasa
    ... na promene temperature i pritiska = Visoka preciznost i pouzdanost = Sposobnost rada u teškim uslovima i različitim tečnostima " Temperaturni limit rada do 400?C, a pritisaka do 160 bar Ograničenja radarskog merenja: = Viša cena u poređenju sa drugim metodama " Mogućnostinterferencije sa metalnim ...
    ... Kapacitivno merenje nivoa se zasniva na promeni kapacitivnosti između dve elektrode kako se nivo tečnosti menja. Kapacitivnost kondenzatora Je data formulom: gde je: C - kapacitivnost ć – dielektrična konstanta materijala između elektroda A - površina elektroda d - rastojanje između elektroda ...
    ... nazad do senzora. Vreme leta (Time of flight) zvučnih talasa se koristi za izračunavanje rastojanja do površine tečnosti, a time i nivoa tečnosti. Formula za izračunavanje nivoa na osnovu vremena leta je: t d=" 2 gde je: d - rastojanje do površine tečnosti v - brzina zvučnih talasa, zavisi od ...

  • Strukture kristala - odabrana poglavlja iz kristalografije i njena multidisciplinarnost

    Ljiljana Karanović (2024)
    Kristalografija

  • Praktikum za vežbe iz Informatike 1

    Ranka Stanković, Ivan Obradović, Olivera Kitanović, Mirjana Banković (2014)
    informatika
    ... prikazuje tekst formule koja se nalazi u ćeliji, već samo rezultat izračunavanja. Kada se obeleži ćelija formula se pojavljuje u Formula Bar –u. Ponekad je potrebno da se vide sve formule na radnom listu, što se postiže komandom Formulas/Formula Auditing grupa/Show Formulas. Vidljivost formula se isključuje ...
    ... operacija. Za unos formule prvo se označi ćelija u kojoj se želi prikaz rezultata i vrši se unos direktno u ćeliji ili se može koristiti predviđeno polje Formula Bar. Formula uvek počinje znakom jednakosti (=) koji Excel-u najavljuje da sledi unos formule. Kraj unosa formule označava se tasterom ...
    ... ili se u njoj može nalaziti rezultat neke formule pa će njena vrednost zavisiti od sadržaja ćelija uključenih u formulu (o samom formatiranju i formulama biće više reči kasnije). Paste naredba, pored kopiranja ćelije u celosti (sa formatiranjem i formulom ako postoje), sadrži i nekoliko dodatnih opcija: ...

  • Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite

    Philippe Colomban, Aleksandar Kremenović (2020)
    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 ...
    asbestos, CMC, Corsica, fiber, pottery
    ... becomes more and more important when approaching the surface of the grain. The firing conditions (temperature, heating, rate, levels, etc.) therefore limit degradation, and the fibers are generally preserved, as evidenced by the pull-out over lengths on the order of several millimeters. This testifies ...
    ... isolated (inosilicates) or connected to form layers (phyllosilicates). Serpentinite minerals (corresponding, rock: serpentine), of an “idealized” formula MgaSi2Os(OH)u, are hydrous phyllosilicates. Many polymorphs are identified; the most frequent minerals are antigorite, chrysotile and lizardite. ...
    ... (CaMg((SiOy)»), also belong to the inosilicate group but exhibit a simpler composition, without the OH group. Orthopyroxenes have a more complex formula: (Mg.,Fe)>SiyOx. Jadeite, the second form of jade, has a composition close to NaAISi»O6. Due to the similarity of the XRPD patterns of the ser ...

  • Application of stochastic models for mine planning and coal quality control

    Dejan Stevanović, Božo Kolonja, Ranka Stanković, Dinko Knežević, Mirjana Banković (2014)

  • Analiza toplotne moći i Vobeovog indeksa prirodnog gasa različitog porekla

    Lana Mitrović (2024)
    U radu su prikazane najznačajnije osobine prirodnog gasa, uključujući hemijski sastav, jednačine sagorevanja i termodinamičke karakteristike koje predstavljaju osnovu za dalje razumevanje rada. Prikazane su količine prirodnog gasa na evropskom trţištu prema zemlji porekla, kao i njihove zasebne hemijske i termodinamičke karakteristike.Kvalitet prirodnog gasa u Republici Srbiji je posebno poglavlje u radu u okviru kog je detaljnjije opisano snabdevanje Republike Srbije prirodnom gasom, kao i zahtevani kvalitet.Na kraju, obuhvatajući sve prethodno navedeno, prikazan je postupak rešavanja Studije slučaja koja ...
    prirodni gas, toplotna moć, Vobeov broj, zahtevani kvalitet prirodnog gasa, namešavanje

  • Synthesis of MnCo2O4 nanoparticles as modifiers for simultaneous determination of Pb(II) and Cd(II)

    Vesna Antunović, Marija Ilić, Rada Baošić, Dijana Jelić, Aleksandar Lolić (2019)
    The porous spinel oxide nanoparticles, MnCo2O4, were synthesized by citrate gel combustion technique. Morphology, crystallinity and Co/Mn content of modified electrode was characterized and determined by Fourier transform infra-red spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray diffraction pattern analysis (XRD), simultaneous thermogravimetry and differential thermal analysis (TG/DTA). Nanoparticles were used for modification of glassy carbon electrode (GCE) and new sensor was applied for simultaneous determination of Pb(II) and Cd(II) ions in water samples with the ...
    MnCo2O4 nanočestice, modifikatori, određivanje Pb (II) and Cd(II)

  • Application of Project Management Process on Environmental Management System Improvement in Mining-Energy Complexes

    Jelena Malenović Nikolić, Dejan Vasović , Ivana Filipović , Stevan Mušicki, Ivica Ristović (2016)
    menadžment, rudrastvo i energetski kompleksi, okruženje, održivi razvoj, mrežno planiranje

  • The analysis of the geothermal energy capacity for power generation in Serbia

    Jana Stojković, Goran Marinković, Petar Papić, Mihailo Milivojević, Maja Todorović, Marina Ćuk (2013)
    Renewable Energy, Sustainability and the Environment

  • Primena programa UVSZ pri zaštiti od miniranja

    Suzana Lutovac, Miloš Gligorić, Jelena Majstorović, Luka Crnogorac, Rade Tokalić (2021)
    Primena energije eksploziva tj. miniranje, predstavlja osnovni način eksploatacije čvrstih mineralnih sirovina u rudarstvu. Miniranjem se postižu vrlo povoljni tehnoekonomski pokazatelji, koje nažalost prate i negativni efekti miniranja. U cilju zaštite životne sredine potrebno je za svaku radnu sredinu odrediti jednačinu oscilovanja stenske mase pri miniranju. Ova jednačina definiše promenu brzine oscilovanja stenske mase u zavisnosti od rastojanja, količine eksploziva, uslova izvođenja miniranja i geoloških karakteristika stenske
    Program UVSZ, miniranje, potres, zaštita životne sredine
    ... oscilovanja stenske mase po formuli: (1) Maksimalna brzina oscilovanja dobija se tako što se sa snimljenog velosigrama o ita maksimalna amplituda posebno za svaku komponentu, a zatim se izra una rezultuju a maksimalna brzina oscilovanja po formuli 1. Stvarna brzina oscilovanja ...
    ... stenske mase Vingx Po formuli: or im Unax = VU; by + uy mm (1) Maksimalna brzina oscilovanja V2, dobija se tako Sto se sa snimljenog velosigrama o¢ita maksimalna amplituda posebno za svaku komponentu, a zatim se izracuna rezultujuca maksimalna brzina oscilovanja po formuli 1. Stvarna brzina oscilovanja ...
    ... komponente, a zatim se ra¢una rezultujuca 152 X I I I S k u p p r i v r e d n i k a i n a u n i k a 153 stvarna brzina po istoj formuli. Na datom velosigramu mogu e je direktno o itati stvarnu brzinu oscilovanja (vektor max (ch 1-3)). Uzimanjem u obzir maksimalne brzine oscilovanja ...

  • Primena metoda podzemnog otkopavanja sa očuvanjem površine terena

    Uroš Mirković (2024)
    Tema ovog diplomskog rada je primena metoda podzemnog otkopavanja sa očuvanjem površine terena, sa posebnim osvrtom na metodu otkopavanja uz zasipavanje pasta zasipima. Ova metoda omogućava efikasan eksploatacioni proces u podzemnim rudnicima, uz minimalne uticaje na površinu, čime se smanjuju deformacije i sleganja terena iznad eksploatacionih radova. Pasta zasipi, koji se sastoje od mešavine jalovine, vode i cementa, koriste se za popunjavanje ispražnjenih prostorija nakon otkopavanja, čime se obezbeđuje stabilnost okolnih stena i smanjuje rizik od urušavanja. Ovaj rad ...
    podzemna eksploatacija, bakar, otvaranje rudnika, metoda otkopavanja, očuvanje površine terena
    ... pomoću formule: q=quk1 xkzxkgxk4xk5xk5,kg/m3 qo - etalonska potrošnja eksploziva (O0,6 kg/m?) koja zavisi od fizičko mehaničkih osobina rude, a usvaja se iz tabele na osnovu poznatog. koeficijenta čvrstoće (f), ki - koeficijent radne sposobnosti eksploziva određuje se po formuli: A _3 _ ...
    ... lepezi po formuli: dž x n E= 4 x Lmp XpXxX K,,hg gde je: Qe – količina eksploziva u lepezi, 351,26 kg Lmp - dužina minskog punjenja, m db — prečnik bušenja, 0,076 m p - zapreminska masa eksploziva, 1.000 kg/m? Kp – koeficijent punjenja minskih bušotina, 0,95 Ako se formula za količinu ...
    ... iznosi: ki = 400/360 ki=1,11 k - koeficijent uticaja pukotina u masivu, koji karakteriše uticaj pukotina u rudnom masivu a određuje se po formuli: ko = (Ip/dk)wd lp- srednje rastojanje između vidljivih pukotina (0,6) dk- veličina komada odminirane rude (0,5) na - koeficijent koji zavisi ...