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Упит dcterms_subject_txt:Statistical and Nonlinear Physics

2356 items

  • Tectonic evolution of the Vršac Mts. (NE Serbia): Inferences from field kinematic and microstructural investigations

    Uroš Stojadinović, Nemanja Krstekanić, Bojan Kostić, Marija Ružić, Aleksa Luković (2021)
    The Vršac Mts. in NE Serbia represent the key area to investigate structural relations between the Northern Serbo-Macedonian Subunit and Supragetic Unit of the Dacia Mega-Unit. The geodynamic events during the Variscan orogeny in the Late Paleozoic colligated the two units and led to their metamorphic differentiation. The Late Cretaceous extension exhumed the medium-grade Serbo-Macedonian metamorphic rocks and structurally juxtaposed them against the low-grade metamorphosed basement of the Supragetic Unit along an E-dipping shear zone, which outcrops in the ...
    severna srpsko-makedonska subjedinica, supragetikum, kinematska analiza, multifazna ekstenzionalna deformacija
    ... (in Serbian, with English and Russian Summaries). Federal Geological Institute, Belgrade, 1–47. Willingshofer E., Neubauer F. & Cloetingh S. 1999: The significance of Gosau-type basins for the late cretaceous tectonic history of the Alpine-Carpathian belt. Physics and Chemistry of the Earth, Part ...
    ... obtained statistical mean orientations of foliation and stretching lineation in these three geologically different structures (Fig. 3). Such spatial separa- tion of data was necessary in order to constrain the structural variability of these two tectonic units across their contact and the effect ...
    ... The microstructures were analysed to determine the deforma- tion sequence and the tectonic transport on the thin-section scale. Results Map-scale structural analysis In the Northern Serbo-Macedonian Subunit, a statistical analysis of poles to foliation shows foliation dip direction/dip maximum ...

  • Low-temperature phase transition and magnetic properties of K3YbSi2O7

    Predrag Dabić, Volker Kahlenberg, Biljana Krüger, Marko Rodić, Sabina Kovač, Jovan Blanuša, Zvonko Jagličić, Ljiljana Karanović, Václav Petříček, Aleksandar Kremenović (2021)
    alkalni silikati elemenata retkih zemalja, fazni prelazi, magnetne karakteristike, razdvajanje kristalnog polja, silikati lantanica
    ... 11351, Serbia, eFaculty of Civil and Geodetic Engineering, University of Ljubljana, Jamova cesta 2, Ljubljana, 1000, Slovenia, fInstitute of Mathematics, Physics and Mechanics, Jadranska 19, Ljubljana, 1000, Slovenia, and gStructure Analysis, Institute of Physics, Academy of Sciences of the Czech ...
    ... O—Si—O bond angles of 108.27 (11)� and 110.65 (11)� are rather typical for oxo-silicates (Liebau, 1985) and close to the ideal tetrahedral angle of 109.5�. The bridging Si—O bonds are in agreement with the results of the statistical analysis given by O’Keefe and Hyde (1978). These authors found an ...
    ... (Liebau, 1985) and close to the ideal tetrahedral angle of 109.5°. The bridging Si—O bonds are in agreement with the results of the statistical analysis given by O’Keefe and Hyde (1978). These authors found an empirical relationship between the Si—O bond distance /, the Si—O — Si angle @ and the non-bonded ...

  • Quantitative analysis of syllable properties in Croatian, Serbian, Russian, and Ukrainian

    Biljana Rujević, Marija Kaplar, Sebastijan Kaplar, Ranka Stanković, Ivan Obradović, Jan Mačutek (2021)
    slogovi, distribucija rang-preciznost, slovenski jezici

  • Long-term planning methodology for improving wood biomass utilization

    Vladimir Vukašinović, Dušan Gordić, Marija Živković, Davor Koncalović, Dubravka Živković (2019)
    The insufficiently developed forest management system is often followed by undeveloped forest resources supply chain and insufficient institutional support. These cause inefficient usage of fuel-wood as well as huge amounts of unused forest residues. In order to achieve optimal and long-term sustainable utilisation of biomass, an original methodology based on the interaction of mathematical optimization and backcasting approach has been developed. Mathematical optimization is used for both generation and consideration of techno-economic parameters of the forest biomass supply chain. ...
    Long-term planning methodology, Forest biomass, MINLP, Backcasting

  • Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series

    Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić (2021)
    Underground mining engineers and planners in our country are faced with extremely difficult working conditions and a continuous shortage of money. Production disruptions are frequent and can sometimes last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. ...
    deformacije podgrade, lasersko skeniranje, višekanalna singularna spektralna analiza, prognoza, klasterisanje fuzzy vremenskih serija
    ... strength and failure Energies 2021, 14, 3710. https://doi.org/10.3390/en14123710 https:/ /www.mdpi.com/journal/energies Energies 2021, 14, 3710 2 of 20 mode, was provided when a comparison of these three types of information was done [1]. Danial Jahed Armaghani et al. [2] applied three-nonlinear forecasting ...
    ... classical multivariate statistical analysis literature. The matrix Y(i)Y(i)T , which is used in the univariate SSA, for the series X(i) Ni appears along the main diagonal, and the products of two Hankel matrices Y(i)Y(i)T (i 6= j) that are related to the series X(i) Ni and X(j) Nj appear in the ...
    ... matrix in the classical multivariate statistical analysis literature. The matrix Y YT, which is used in the univariate SSA, for the series X \ appears along the main diagonal, and the products of two Hankel matrices YY? (i # j) that are related to the series XV and x appear in the off-diagonal. The SVD ...

  • Prognoza operativne efikasnosti aktivnog podzemnog rudnika zasnovana na teoriji sivih sistema

    Svetlana M. Štrbac-Savić (2016-06-10)
    Efikasnost predstavlja preduslov za opstanak svake rudarske kompanije, posebno u uslovima izuzetno konkurentnog trţišnog okruţenja kao što je to rudarska industrija. Efikasnost oznaĉava sposobnost kompanije da ispuni svoje kratkoroĉne ili dugoroĉne ciljeve. Operativna efikasnost se definiše kao odnos izmeĊu ulaznih parametara potrebnih za odvijanje proizvodnje i pokazatelja dobijenih proizvodnjom. U kontekstu rudarskog poslovanja, operativna efikasnost se odnosi na vreme potrebno da se mineralno dobro transformiše u novĉana sredstva. Visoka operativna efikasnost se postiţe kada se ostvari prava kombinacija karakteristika ...
    podzemni rudnik, operativna efikasnost, prognoza, teorija sivih sistema, stohastiĉke diferencijalne jednaĉine, simulacija
    ... In the mining industry in particular, the relationships between input variables that are controllable and those that are not and the physical and economic outcomes are complex and often nonlinear. Operational efficiency forecasting of mine in today‘s environment is much complex than it was just a ...
    ... diferencijalnih jednačina, Master rad, Univerzitet u Beogradu, Matematiĉki fakultet, Beograd, 2013. [EICHENAUER86] Jurgen Eichenauer and Jurgen Lehn, A nonlinear congruential pseudorandom number generator, Statist. Hefte 27 no. 4, pp. 315–326, 1986. http://www.ams.org/mathscinet/search/authors ...
    ... Al-Waked, Managerial and Operational Efficiency Valuation of Privatized Firms: Case of Jordan Mining Sector, European Journal of Economics, Finance and Administrative Sciences ISSN 1450-2275 Issue 49 (2012), pp. 56-70. 2012. [KIYMAZ03] H. Kiymaz and R. Hodgin, Enhancing Clarity and Completeness of ...

  • BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties

    Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković (2023)
    To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ...
    ferroelectric, dielectric properties, magnetic properties, titanate/ferrite composites, phase composition
    ... terms and conditions of the Creative Commons Attribution (CC BY) license (https:/ / creativecommons.org//licenses/by/ 4.0/). Department of Chemistry, University of Belgrade-Institute of Chemistry, Technology and Metallurgy, Njegoševa 12, 11000 Belgrrade, Serbia ? - Faculty of Physics, University ...
    ... surface and processing of obtained structures into dense ceramics. The effect of structural properties and phase composition, as well as two sintering; schedules on dielectric and ferroelectric properties of synthesized ceramic composites, was studied and explained in detail. 2. Results and Discussion ...
    ... , LP., M.M.M., A.D., A.K., V.B.P, A.K.-G. and L.A.; Resources, M.Š., LP., M.M.M., A.D., A.K., V.B.P, A.K.-G. and L.A.; Writing—Original Draft, MŠ. and L.A.; Writing—review and editing, MŠA., V.B.P.and L.A.; Supervision, L.A. All authors have read and agreed to the published version of the manuscript ...

  • Ефикасност дистрибуције и коришћења природног гаса у домаћинствима

    Dejan Brkić (2010-03-30)
    Природни гас ће се у будућности све више користити као енергент за подмиривање грејних потреба становништва у српским градовима. Стога је потребно изнаћи најповољнији начин употребе природног гаса. Природни гас се може користити за подмирење грејних потреба становништва на два дијаметрално супростављена начина, и то директно, тако што би се гас директно уводио у зграде путем дистрибутивног система за снабдевање гасом и затим сагоревао у гасном котлу којим је сваки стан опремљен (гасни дистрибутивни систем), или индиректно, тако што ...
    prirоdni gаs, distribuciја gаsа,grејаnjе, cеvоvоdi, cеvоvоdnе mrеžе,fаktоr trеnjа pri prоtоku fluidа,urbаnizаm
    ... friction factor of open channel flow. Communications in Nonlinear Science and  Numerical Simulation 14(5), 2373‐2378. (на енглеском)  305. Zagarola, M.V., Perry, A.E., Smits, A.J., 1997. Log laws or power laws: The scaling in the  overlap region. Physics of Fluids 9 (7), 2094‐2100. (на енглеском)  306. Zagarola ...
    ... sign 80(12), 54‐55. (на  енглеском)  64. Caillol, J.M. 2003. Some applications of the Lambert W function to classical statistical  mechanics. Journal of Physics A: Mathematical and General 36(42), 10431–10442. (на  енглеском)  65. Calzetta, E. 2009. Friction factor for turbulent flow in rough pipe ...
    ... al Transactions of the Royal Society A: Mathematical, Physical  and Engineering Sciences 365(1852), 699‐714. (на енглеском)  10. Altman, T., Boulos, P.F., 1995. Convergence of Newton method nonlinear network  analysis. Mathematical and Computer Modelling 21(4), 35–41. (на енглеском)  11. Andriyashev ...

  • Ефикасност дистрибуције и коришћења природног гаса у домаћинствима

    Dejan Brkić (2010-03-30)
    Природни гас ће се у будућности све више користити као енергент за подмиривање грејних потреба становништва у српским градовима. Стога је потребно изнаћи најповољнији начин употребе природног гаса. Природни гас се може користити за подмирење грејних потреба становништва на два дијаметрално супростављена начина, и то директно, тако што би се гас директно уводио у зграде путем дистрибутивног система за снабдевање гасом и затим сагоревао у гасном котлу којим је сваки стан опремљен (гасни дистрибутивни систем), или индиректно, тако што ...
    prirоdni gаs, distribuciја gаsа,grејаnjе, cеvоvоdi, cеvоvоdnе mrеžе,fаktоr trеnjа pri prоtоku fluidа,urbаnizаm
    ... friction factor of open channel flow. Communications in Nonlinear Science and  Numerical Simulation 14(5), 2373‐2378. (на енглеском)  305. Zagarola, M.V., Perry, A.E., Smits, A.J., 1997. Log laws or power laws: The scaling in the  overlap region. Physics of Fluids 9 (7), 2094‐2100. (на енглеском)  306. Zagarola ...
    ... sign 80(12), 54‐55. (на  енглеском)  64. Caillol, J.M. 2003. Some applications of the Lambert W function to classical statistical  mechanics. Journal of Physics A: Mathematical and General 36(42), 10431–10442. (на  енглеском)  65. Calzetta, E. 2009. Friction factor for turbulent flow in rough pipe ...
    ... al Transactions of the Royal Society A: Mathematical, Physical  and Engineering Sciences 365(1852), 699‐714. (на енглеском)  10. Altman, T., Boulos, P.F., 1995. Convergence of Newton method nonlinear network  analysis. Mathematical and Computer Modelling 21(4), 35–41. (на енглеском)  11. Andriyashev ...

  • Hydrochemical features and their controlling factors in the Kucaj-Beljanica Massif, Serbia

    Fen Huang, Ljiljana Vasic, Xia Wu, Jianhua Cao, Saša Milanovic (2019)
    Earth-Surface Processes, Geology, Pollution, Soil Science, Water Science and Technology, Environmental Chemistry, Global and Planetary Change

  • Structural and geochronological constraints from the Drina-Ivanjica thrust sheet (Western Serbia): implications for the Cretaceous–Paleogene tectonics of the Internal Dinarides

    Kristof Porkoláb, Szilvia Kövér, Zsolt Benkó, Gabor Héja, Melinda Fialowski, Balázs Soós, Nataša Gerzina Spajić, Nevenka Đerić, László Fodor (2019)
    Internal Dinarides, Drina-Ivanjica thrust sheet, Deformation history, K–Ar dating, Obduction, Structural analysis
    ... method (Balogh 1985) in the K-Ar laboratory of the Institute for Nuclear Physics of the Hungarian Academy of Sciences in Debrecen. The potassium content was mea- sured on 50 mg sample aliquots after dissolution by HF and HNOx, by a Sherwood-400 type flame spectro-photometer with an accuracy ...
    ... orogen and are attributed to the latest Cretaceous-Paleogene collision between Adria and Europe. Regional Latest Cretaceous-Paleogene shortening was followed by strike-slip tectonics (N-S shortening and perpendicular extension) and subsequent Miocene normal faulting in both orogen-parallel and orog ...
    ... relations between NE-SW and NW-SE trending normal faults and Dxy strike slip faults (Figs. 2 and 7a). We have distinguished two extensional stress tensor groups that represent orogen-parallel (NW-— SE) and orogen-perpendicular , (NE-SW) extension (Fig. 5). Our observations and the dataset are not ...

  • Mineral Resources of Serbia: Environmental, Societal and Economic Challenges

    Vladimir Simić, Rade Jelenković, Dragana Životić (2019)
    ... 2007 Applied Physics and Informatics, Faculty of Physics, University of Belgrade Research Topics: Atmospheric chemistry and physics Environmental multiphase systems Air pollution spatio-temporal distribution, transport and forecast Environmental factors affecting human health and mortality; ...
    ... of the Statistical Office of the Republic of Serbia, national strategy of sustainable agriculture and rural development and other development and legislative documents of line ministries, institutions and organizations. A number of scientific papers and projects results of domestic and foreign ...
    ... analyzed and evaluated using the following mathematical and statistical methods: factor impact on the plant characteristics (variance analysis) and correlation analysis of plant characteristics with the use of the statistical package STATISTICA 12 for Windows. Applied mathematical and statistical methods ...

  • Model inteligentnog sistema adaptivnog upravljanja procesom prerade rude

    Ivana M. Jovanović (2016-01-13)
    U oblasti procesa prerade rude, flotacijska koncentracija predstavlja jednu od najznačajnijih i najčešće primenjivanih metoda separacije korisnih od nekorisnih minerala. Samim tim, veoma je važno osigurati uspešan rad flotacijskog postrojenja kroz dostizanje zadovoljavajućih tehno-ekonomskih pokazatelja. Cilj upravljanja procesom flotacijske koncentracije je upravo optimizacija kvaliteta i iskorišćenja korisne komponente u koncentratu uz maksimizaciju profita. Shodno tome, istraživanja na polju modelovanja i upravljanja ovim procesom zauzimaju značajno mesto u praksi kontolnog inženjenringa.Teorijska istraživanja u okviru doktorske disertacije obuhvatila su analizu položaja ...
    flotacijska koncentracija, modelovanje, upravljanje, inteligentni sistem, soft kompjuting, fazi logika, veštačke neuronske mreže
    ... 1999. A model to relate the flotation rate constant and the bubble surface area flux in mechanical flotation cells. Minerals Engineering, Vol. 12, No. 6, pp. 599-608 54. DeHaan, D., Guay, M., 2010. Robust Adaptive Model Predictive Control of Nonlinear Systems. In: Model Predictive Control (Edited by ...
    ... Control of Flotation Columns. In: Advanced Control and Supervision of Mineral Processing Plants (Edited by D. Sbárbaro, R. del Villar), Chapter 6, pp. 249–286 57. Delport, R., 2005. Process identification using second order Volterra models for nonlinear model predictive control design of flotation circuits ...
    ... Environment and Information Technology, University of Pretoria, 137 p. 58. Desbiens, A., Hodouin, D., Najim, K., Flament, F., 1994. Long-range predictive control of a rougher flotation unit. Minerals Engineering, Vol. 7, No. 1, pp. 21–37 59. Desbiens, A., Hodouin, D., Mailloux, M., 1998. Nonlinear predictive ...

  • A Data Driven Approach for Raw Material Terminology

    Olivera Kitanović, Ranka Stanković, Aleksandra Tomašević, Mihailo Škorić, Ivan Babić, Ljiljana Kolonja (2021)
    The research presented in this paper aims at creating a bilingual (sr-en), easily searchable, hypertext, born-digital, corpus-based terminological database of raw material terminology for dictionary production. The approach is based on linking dictionaries related to the raw material domain, both digitally born and printed, into a lexicon structure, aligning terminology from different dictionaries as much as possible. This paper presents the main features of this approach, data used for compilation of the terminological database, the procedure by which it has ...
    sirovine, rudarstvo, terminologija, rečnik, terminološka aplikacija, mobilna aplikacija, digitizacija, leksički podaci, korpusi, otvoreni povezani podaci
    ... dictionaries yielding 94,539 English terms and 48,096 Serbian terms. Some terms were found in both datasets: extracted from text and retrieved from dictionaries, namely, a total of 2285 English and 308 Serbian terms. The GIZA++ [43] and Moses toolkit [44] for statistical machine translation (SMT) were used ...
    ... example, 885 (7%) terms related to biology, chemistry, mathematics, informatics and physics. Among entries from the mining domain, those related to a specific subdiscipline of mining were identified by mining experts, and marked by a subdomain marker, as for example, entries related to mineral processing ...
    ... approach for information retrieval is not so successful for knowledge extraction, lexicographic and ter- minological purposes, so we are relying on a combination of syntactic patterns [34,42,68] and statistical association measures for domain terms: log-likelihood [69], c-value/nc- value [70], because such ...

  • Sinteza i karakterizacija vanadata alkalnih metala sa elementima retkih zemalja

    Anđela Jovanović (2024)
    Predmet i cilj pisanja ovog rada su sinteza i karakterizacija vanadata alkalnih metala sa elementima retkih zemalja. Prilikom ovih istraživanja, ispitivan je sistem REE2O3–V2O5–KF, gde REE predstavlja trovalentni katjon izabranih elemenata retkih zemalja (Y, Sm, Eu, Gd, Er, Yb). Ovo istraživanje bazirano je na sintezi kristala, nakon čega su dobijeni kristali posmatrani pod binokularnom lupom, analizirani metodom rendgenske difrakcije na polikristalnom materijalu (XRPD) i metodom skenirajuće elektronske mikroskopije sa energetsko-disperzivnom spektroskopijom (SEM-EDS), kako bi se utvrdile karakteristike dobijenih kristala. ...
    elementi retkih zemalja, sinteza kristala metodom fluksa, vanadati alkalnih metala, rendgenska difrakcija, SEM-EDS metoda

  • 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)
    analogno modelovanje, raspodela deformacija, geometrija indentera, Černa i Timok rasedni sistem
    ... Willingshofer, E., Picken, S.J., 2019. New analogue materials for nonlinear lithosphere rheology, with an application to slab break-off. Tectonophysics 756, 73–96. Broerse, T., Krstekanić, N., Kasbergen, C., Willingshofer, E., 2021. Mapping and classifying large deformation from digital imagery: application ...
    ... strike-slip structure (1 in Fig. 3e and f) and the main strike-slip fault (2 in Fig. 3e and f) are connected by obliquely oriented thrusts in map view (3 and 4 in Fig. 3c–f, cross-section b-b’ in Fig. 3g) and NNW-SSE oriented strike-slip faults (5 and 6 in Fig. 3e and f, cross- section b-b’ in Fig. 3g) ...
    ... motion of the underlying plate (Figs. 5 and 6). The Fig. 7. Basin geometry parameters and top-view shape and position. a) Charts of basin width, length and depth in each experiment. Basins’ widths and lengths are measured in the final top-view photos in the E-W and N–S direction. Basin depths are obtained ...

  • Review: Methodological approaches and research techniques for addressing construction and remediation problems in karst reservoirs

    Saša Milanović, Ljiljana Vasić (2021)
    Earth and Planetary Sciences (miscellaneous), Water Science and Technology

  • Отпад из процеса сагоревања угља као сировина за добијање елемената ретких земаља

    Бојан Земљак (2024)
    Због великог броја индустрија у којима се користе ови ресурси, глобална економија се у великој мери ослања на елементе ретких земаља. Елементи ретких земаља су есенцијална сировина — материјал за развој савремених технологија, али у односу на њихову огромну потражњу, њихово вађење је ограничено и повезано је са значајним утицајима на животну средину. Због њихове ограничене доступности, проблема који се јављају при процесима експлоатације, све више и више земаља почиње да тражи повољније могућности вађења елемената [REE] из секундарних ...
    Елементи ретких земаља, резерве, употреба, представници и методе опоравка елемената ретких земаља
    ... between trivalent and tetravalent metallic cerium and other f-elements: stability study of various lanthanide-and actinide-halides and- oxides. Journal of Physics and Chemistry of Solids, 39(5), p.467-484. #1 [41] Zych, A.K., 2011. Luminescence properties of Ce3+, Pr3+ and Nd3+ activated ...
    ... Zhang, G. and Tu, H., 2022. Magnetocaloric effect in LiLn6O5 (BO3) 3 (Ln= Gd, Tb, Dy, and Ho). Cryogenics, 124, p.103476. [144] Balli, M., Jandl, S., Fournier, P. and Kedous-Lebouc, A., 2017. Advanced materials for magnetic cooling: Fundamentals and practical aspects. Applied Physics Reviews, 4(2) ...
    ... , Wall, F. and Merriman, D., 2018. The rare earth elements: demand, global resources, and challenges for resourcing future generations. Nafura/ Resources Research, 27, p.201-216. [9] Kursun Unver, I. and Terzi, M., 2018. Distribution of trace elements in coal and coal fly ash and their recovery ...

  • Alpine thermal events in the central Serbo-Macedonian Massif (southeastern Serbia)

    Milorad D. Antić, Alexandre Kounov, Branislav Trivić, Andreas Wetzel, Irena Peytcheva, Albrecht von Quadt (2015)
    General Earth and Planetary Sciences

  • 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
    ... against the fraction of sp hybridized carbon C-C sp* from Table 7. There is a fair nonlinear correlation between the degree of carbonization and log žAo". The value for the polarization of ACI is relatively low and might be a consequence of the high porosity of the sample that dis- turbs the free ...
    ... on: Facilitating Inorganic Nutrients Recycling and Altering Organic Matter Leaching. Energy Fuels. 2015; 29: 4407—4417. https://doi.org/ 10.1021/acs.energyfuels.5b01020. Van Krevelen DW. Graphical statistical method for the study of structure and reaction processes of coal. Fuel. 1950; 29: 269–284 ...
    ... intercept is 0.067 and represents the mean influence of the initial composition of the biomass and the changes due thermal degradation. Decarboxylation and decarbonylation result in lower O/C and higher H/C, dehydrogenation in lower H/C and demethanization in lower H/C and higher O/C. Evolution ...