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Упит dcterms_subject_txt:rock mass oscillation equation

340 items

  • Hydrogeochemistry of Uranium in the Groundwaters of Serbia

    Marina Ćuk, Maja Todorović, Petar Papić, Jovan Kovačević, Zoran Nikić (2015)

  • Laboratory testing of fly ash

    Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić (2016)
    Fly ash is one of the most common waste materials created by burning of coal. It is composed of smaller particles, consisting mainly of aluminosilicate glass, mullite and quartz, which are collected by electrostatic separators (filter) of gaseous products arising from the combustion of coal. This paper presents the pozzolanic properties, mechanical properties, chemical and mineral composition of fly ash obtained in the combustion process in a power plant Nikola Tesla A (PPNT A) with the addition of a ...
    chemical composition, fly ash, mechanical properties, mineral properties, pozzolanic properties, X-ray diffraction
    ... results of the chemical composition of ashes from PPNT A for the period from 1983 to 2004 Chemical composition min max mean Ash composition, mass / % SiO2 21,98 71,75 53,30 Al2O3 7,51 27,64 20,72 Fe2O3 2,16 10,11 7,23 CaO 2,12 16,10 8,74 MgO 0,64 4,39 2,64 SO3 0,66 3,27 1,76 S 0,26 1 ...
    ... chemical analyses of fly ash taken in S1 and S2 at location of PPNT A Chemical composition S1 S2 Mean values 1983 ÷ 2004 Ash composition, mass / % Loss on ignition 1000 °C 6,43 7,20 - SiO2 51,64 51,43 53,30 Al2O3 21,87 22,01 20,72 Fe2O3 5,54 6,03 7,23 CaO 1,05 1,16 8,74 MgO 3,01 2,83 ...

  • Анализа могућности примене метода повећања степена искоришћења на нафтном лежишту "Ј"

    Иван Савић (2024)
    Комплексно лежиште „Ј“ је сачињено од колектор стена различите стратиграфске припадности и хетерогеног литолошког састава. Лежиште се налази у последњој фази разраде, а током животног века експлоатисано је само примарним методама. У раду је приказана анализа стања разраде лежишта, а као основни фактори који су допринели ниском степену искоришћења лежишта издвојени су вискозност нафте, хетерогеност колектора и пад лежишног притиска. Изведена је хидродинамичка симулациона студија помоћу које је издвојена најпогоднија зона за пилотну примену терцијарних метода. Коришћењем „скрининг“ критеријума ...
    Вискозност, хетерогеност, полимери, термичке методе
    ... ce, Kao Jaknta H Mo0OuiHuja (baaa, Opxxe Kpehe y JICKHIIITy IHITO JIOBOJIH JIO 3aBOJIbaBaMba IIpOH3BOJIHHX 6yIIIOTI/IHa. [L] 200 |Oi Mass Density| ater Mass De. - - a x 980 980 820 88 830 875 823 840 770 770 850 860 870 880 890 900 m MJI baj 18 s2o||| z 6 930 [] ...
    ... 6oo0e (0ecno) y neotcuumy 44 4HAJIH34 MOL—YBHOCTH HPHMEHE METO/I4 IIOBEBA4MIb4 CTEIEH4 HCKOPHIIBEIb4 H4 HADTHOM JIEDKHIHTYy "J". TVDSS, m 'Oil Mass Dene š __|770.00 seo cO yl \Weter Macs Density, kofm3 pog —|770 00 [55 900 — 90 —| Lu LUŽ 906 — g —| —| 9| 9r —| Cauka 3.11 ...
    ... kpuga 3a Oywomuny J-74/{ 3.5. HyMepuuka cuMy:ianuja ucropujara paja ne:umrra „„J“ V pany Je kopumheH codTBepcku makeT „THaBHrarop“, KoMmaHuje „Rock Flow Dynamics”. BasaHa BapujaHra Mojnena ucropHjaTa je J;BOKOMIIOHeCHTHH MOJICJI „uHpHa HaQTa“. V ocHoBH pajna ıporpaMa „THaBurarop“ je MoJIen rpoToka ...

  • Medical Domain Document Classification via Extraction of Taxonomy Concepts from MeSH Ontology

    Mihailo Škorić, Mauro Dragoni (2019)
    This paper is a result of a task that was presented to attendants of Keyword Search in Big Linked Data summer school, that was organized by Vienna University of Technology, under the Keystone COST action in the summer of 2017. It presents a specific approach to the classification via creation of minimal document surrogates based on the US National medical library’s MeSH ontology, which is derived from the Medical Subject Headings thesaurus. In a series of previously classified medically ...
    document classification, MeSH, ontology, information extraction
    ... the similarity of docu- ments, usually with use of the so-called Dice6 index or coefficient. sim(Di, Dj) = 2|Si ⋂ Sj | |Si|+ |SJ | (1) Dice’s equation tells us that if Si is a set of terms from document Di, and Sj is a set of terms from document Dj , then this index can be defined as a double the ...

  • Freeze-dried nanocrystal dispersion of novel deuterated pyrazoloquinolinone ligand (DK-I-56-1): Process parameters and lyoprotectant selection through the stability study

    Jelena R. Mitrović, Maja Bjelošević Žiberna, Aleksandar Vukadinović, Daniel E. Knutson, Dishary Sharmin, Aleksandar Kremenović, Pegi Ahlin Grabnar, Odon Planinšek, Dominique Lunter, James M. Cook, Miroslav M. Savić, Snežana D. Savić (2023)
    Recently, nanocrystal dispersions have been considered as a promising formulation strategy to improve the bioavailability of the deuterated pyrazoloquinolinone ligand DK-I-56-1 (7‑methoxy-2-(4‑methoxy-d3-phenyl)-2,5-dihydro-3H-pyrazolo[4,3-c]quinolin-3-one). In the current study, the freeze-drying process (formulation and process parameters) was investigated to improve the storage stability of the previously developed formulation. Different combinations of lyoprotectant (sucrose or trehalose) and bulking agent (mannitol) were varied while formulations were freeze-dried under two conditions (primary drying at -10 or -45 °C). The obtained lyophilizates were characterized in terms ...
    Pharmaceutical Science
    ... right after freeze-drying, and one and three months after freeze-drying. The redispersibility index (RDI) was calcu- lated using the following equation: dVebefore byo + _O be v 100 Z — aVčafterlyo RDI(%) To detect particles larger than 1 Hm, laser diffraction (LD) was used as an additional ...
    ... including sucrose and trehalose in particular. In addition to their stabilizing effect, these substances also act as tonicity agents, in- crease product mass, and facilitate rehydration of freeze-dried cakes (Bjelosević et al., 2020). The quality of freeze-dried products depends on the process and formulation ...

  • Prioritization of strategic measures for strengthening the security of supply of the Serbian natural gas sector

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    To strengthen the security of supply of the Serbian gas sector, it is necessary to analyze the impact of planned strategic measures. The analysis involves the identification of the most influential threats to the security of natural gas supply and prioritization of the strategic measures for overcoming the consequences of threats. The proposed methodology is based on Fuzzy Analytic Hierarchy Process. The obtained weights for the identified threats and strategic measures are formed according to experts' judgments. The results ...
    Sigurnost snabdevanja, Donošenje odluka, Snabdevanje prirodnim gasom, Fazi AHP, Energetski indikatori

  • Примена нумеричких метода у моделовању тецишта са освртом на различите реолошке услове

    Јелка Крушић (2023)
    Тецишта су комплексне појаве нестабилности које захтјевају истраживања и испитивањакоја до сада нису рађена код нас у области геотехнике. По механизму, начину активирањаи понашању покренутог материјала се знатно разликују од клизишта. Циљ оведисертације је била примјена нумеричких модела пропагације тецишта на примјеру двијепојаве које су се десиле у Србији као посљедица дјеловања циклона Тамара. Детаљноистраживање тецишта подразумијева теренско картирање, теренска истраживања илабораторијска испитивања одабраних узорака са терена. Од теренских истраживања напримјеру тецишта Селанац урађена су геофизичка истраживања Електричнетомографије док ...
    тециште, нумерички модели пропагације, циклон Тамара, геофизичка истраживања, лабораторијска испитивања, Селанац, Лева река, RAMMS, SPH geoflow, реолошки модел

  • Valorization of non-balanced coal reserves in Serbia for underground coal gasification

    David Petrović, Lazar Kričak, Milanka Negovanović, Stefan Milanović, Jovan Marković, Nikola Simić, Ljubisav Stamenić (2019)
    In the name of a better and safer energy future, it is our responsibility to focus our knowledge and activities to save on imported liquid and gas fossil fuels, as well as coal on which energy security of Serbia is based. The rationalization in the use of available energy resources certainly positively affects economy and the environment of a country. This paper indicates motivations for the application of the underground coal gasification process, as well as surface gasification for ...
    ugalj, gasifikacija, zaštita životne sredine, skladištenje, solarna
    ... there are no solid residues in the combustion of gas from UCG process in the boiler furnace, — there is no need for storing about 50% of the total mass is waste material (slag and ash re- main underground), — there is no need to secure significant areas necessary for the collocation and disposal ...
    ... the priority is. The UCG should not be foreseen at all costs. Due to the lowering ofthe level of groundwater, there is an increase in the soil's own mass in the reduction zone, which leads to subsequent subsidence of the terrain in the wider area. This is one of the reasons for the presence of hy ...
    ... (such as water, gel or foam), containing send or other proppants suspended with var- ious agents. Hydraulic fracturing creates cracks in the deep rock formations through which gases flow. The coal layer is usually ignited by inserting a hot coke through the borehole and blowing the low pressure ...

  • Транспортни систем за руду на површинском копу Бувач

    Никола Аџић (2024)
    У општем делу овог рада ће бити наведени утоварно-транспортни системи, њихова подела и основни елементи. У оквиру тога ће бити детаљније објашњени сви појединачни делови ових система као што су багери, камиони, дробилице и транспортери са траком. Даље ће бити наведени програмски пакети који се користе за прорачун ових система Talpac који се користи за прорачун дисконтинуалног транспорта и Helix који се користи за прорачун транспортера са траком. У специјалном делу су наведени параметри које мора да испуни пројектовани ...
    транспортни систем, камион, багер, транспортер са траком, дробилица
    ... Centres 381.8. mm 952.9 mm Shaft Support Centres 462 mm 1076.5. mm Idler Support Fixing Width 1450 mm 2400 mm Idlerset Rotating Mass 14.4 kg 60 kg Idlerset Total Mass 36.6 kg 144.6 kg Idler Vertical Misalignment Allowance 9.0 mm 36.0 mm Dynamic Load Factor 1.14 1.40 Belt Deviation Load 600 ...
    ... PreparedBy · Nikola Conveyor No. T2 Design Date 17 September 2024 Allowable Belt Sag % Running 15 % Allowable Belt Sag % Start / Stop 5 % Takeup Mass 10500 kg Running Starting Braking Coasting Fully Inclines Declines Fully Fully Fully Loaded Empty Loaded Loaded | Loaded | Empty | Loaded · ...
    ... September 2024 Page 41/1 Drive Torque Start-up Factor Loaded 100 % Takeup Pulley Belt Tension 51.49 kN Drive Torque Start-up Factor Empty 100 % Takeup Mass 10500 kg Running Starting Braking Drive Fully Empty Fully Empty Fully Empty Number Loaded Belt Loaded Belt Loaded Belt Drive No. 1 Drive PuleyNo ...

  • A Multilingual Evaluation Dataset for Monolingual Word Sense Alignment

    Sina Ahmadi, John P McCrae, Sanni Nimb, Fahad Khan, Monica Monachini, Bolette S Pedersen, Thierry Declerck, Tanja Wissik, Andrea Bellandi, Irene Pisani, [...] Ranka Stanković and others (2020)
    Aligning senses across resources and languages is a challenging task with beneficial applications in the field of natural language processing and electronic lexicography. In this paper, we describe our efforts in manually aligning monolingual dictionaries. The alignment is carried out at sense-level for various resources in 15 languages. Moreover, senses are annotated with possible semantic relationships such as broadness, narrowness, relatedness, and equivalence. In comparison to previous datasets for this task, this dataset covers a wide range of languages ...
    lexical semantic resources, sense alignment, lexicography, language resource
    ... to unite in a mass. clog.v.06 fill to excess so that function is impaired to obstruct so as to hinder motion in or through; to choke up; . clog.v.04 impede with a clog or as if with a clog to burden; to trammel; to embarrass; to perplex. clog.v.05 coalesce or unite in a mass Figure 1: Sense ...

  • A comparison between ARIMA, LSTM, ARIMA-LSTM and SSA for cross-border rail freight traffic forecasting: the case of Alpine-Western Balkan Rail Freight Corridor

    Miloš Milenković, Miloš Gligorić, Nebojša Bojović, Zoran Gligorić (2023)
    železnica, prekogranični teretni saobraćaj, ARIMA, LSTM, SSA

  • Izbor rotornih bagera za proces revitalizacije: primer rotornih bagera SRs 1200 u rudarskom basenu Kolubara

    Predrag Jovančić, Dragan Ignjatović, Stevan Đenadić, Filip Miletić, Goran Todorović, Dragan Novaković (2020)
    Revitalizacija je proces ili skup tehničkih zahvata na mašini kojim se vrši zamena svih dotrajalih ili oštećenih delova metalne konstrukcije. Sastavni deo procesa revitalizacije je i modernizacija zastarele elektro-mašinske opreme. Principi revitalizacije sasvim sigurno nisu sadržani u okviru redovnog godišnjeg ili dnevnog održavanja. Oni predstavljaju održavanje onih veličina koje su značajne za mašinu kao celinu (u ovom slučaju rotorni bager). U ovom radu su analizirani rotorni bageri oznake SRs 1200. Na površinskim kopovima rudarskog basena Kolubara takvih bagera ima ...
    Rotorni bageri, revitalizacija, SRs1200

  • Inženjerskogeološka istraživanja za potrebe izgradnje tunela T1 na putnom pravcu Požega-Kotroman

    Andrija Popović (2024)
    Tokom izrade završnog rada korišćeni su podaci koje sam dobio u saradnji sa firmom „Saobraćajni institut CIP d.o.o.“, kao i ostala odgovarajuća stručna literatura.Osnovni cilj pisanja rada jeste definisanje određenih fizičko mehaničkih parametara i predlog podgrade i načina iskopa tunela na osnovu RMR klasifikacije.
    stenska masa, RMR klasifikacija, tunel, inženjerskogeološka istraživanja
    ... orijentaciono odrediti mere zaštite (podgrade) iskopa. ROCK CLASSES G F Exceptionally Extremely 100 | [-] HS 3 10 j ul ul ul Bu ej lo g ı Span or h ei gh t i n m E S R 0.001 0.004 0.01 L . I 1000 ROD J O Rock mass quality O= - KNL J—'· x S_:F REINFORCEMENT CATEGORIES: ...
    ... J A P R A G M E N A T A Slika br. 4. – Osnovni GSI dijagram (Hoek i Brown, 1997) 4.1 RMR KLASIFIKACIJA Geomehanička klasifikacija (eng. Rock Mass Rating (RMR) System) predstavljena je od strane Bieniawskog u više navrata. Bieniawski (1973, 1979, 1989, 2011, 2013, 2014) je razvio ceo ovaj ...
    ... odraz prirodnog stanja stenske mase (npr. uticaj miniranja), a mogu uticati na promenu njenog kvaliteta. Na ovim osnovama nastaje MRMR (Mining Rock Mass Rating) sistem, pre svega sa namerom da se koristi u rudarstvu. Godinama se MRMR klasifikacija dopunjavala kako bi se uključila iskustva autora ...

  • 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 ...
    Ceria, Yttrium, Solid solution, Mechanosynthesis, Oxygen vacancy, Nanocrystalline material

  • Overwiew of In-Pit Crushing & Conveying Technology in Open Pit Mines

    Ali Nasirinezhad, Dejan Stevanović, Dragan Ignjatović, Petar Marković (2021)
    The conditions under which contemporary surface mining operations is carried out obviously becoming increasingly complex. In such complex conditions, the optimization of haulage systems as the technological phase with the largest share in the total operating costs, is very important from the aspect of achieving profitability of the mining project. In a large number of cases, the application of traditional haulage systems with trucks (as the most dominant type of haulage in open pit mines) does not lead to ...
    In Pit Crushing and Conveying, IPCC, open pit mining, haulage, optimization, costs saving

  • Geotechnical zoning of the terrain along the first section of E-80 highway in Serbia – SEETO route 7

    Dragoslav Rakić, Zoran Berisavljević, Irena Basarić, Snežana Bogdanović, Jovana Janković (2019)
    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 ...
    ... terrain. Certain significance will also have heterogeneity in terms of lithological composition, weathering degree and primary alternation of rock mass as well as variable physical-mechanical properties. In these terrains, temporary reduction of safety factor can be caused by short-term and ...
    ... terrains that are stable in natural conditions. Maximal groundwater level is at a depth greater than 2 m in these terrains. In solid rock masses is not expected rock fall or B.4 - Structures and infrastructure ECSMGE-2019 – Proceedings 6 IGS erosion as well as shallow sliding on unsecured ...
    ... composition was analysed. Occurrences of rock falls and torrential activities of streams are possible. Within this section, three zones were defined (Figure 10). Due to the construction of larger number of bridges, and because this section is built of solid rock masses, most of the section is c ...

  • Regional Slope Stability Analysis in Landslide Hazard Assessment Context, North Macedonia Example

    Miloš Marjanović, Biljana Abolmasov, Igor Peshevski, James Reeves, Irena Georgievska (2020)

  • Life Cycle Assessment of Individual Wood Biomass Heating Systems in Households

    Boban Pavlović, Dejan Ivezić, Marija Živković (2020)
    The use of solid fuels (wood biomass and coal) for heating of households continues to be common practice within European countries. Solid fuel combustion in households contributes more than 46% to total emissions of fine particulate matter. In this study, a life-cycle assessment (LCA) of firewood-based and pellet-based heating systems is performed. These two systems represent two different types of individual wood biomass heating systems. In the case of the firewood-based heating systems, it is analyzed a typical stove ...
    Grejanje, Analiza životnog ciklusa, Drvna biomasa, Individualni sistemi grejanja
    ... location to the house, and the same type of lorry for the analyzed HSs. As for the waste treatment scenario, it is assumed that 80% of the materials by mass will be recycled and the remaining 20% will be disposed of in a landfill. 3.2 Heating systems specification For the LCA of the individual HSs, ...

  • Control of substructure construction of railways in the Republic of Serbia

    Dragan Lukić, Dragoslav Rakić, Irena Basarić Ikodinović (2022)
    Контрола збијености природног тла (у ископу) или збијеног у насипу при изградњи саобраћајница представља један од основних облика контроле квалитета доњег строја. Код изградње брзих саобраћајница (аутопутеви и брза железница) приоритет је постизање високог нивоа контроле извршених радова. У циљу онемогућавања диференцијалног слегања (при изградњи насипа), или промене запремине услед допунског збијања материјала, које неминовно доводе до деформација, потребно је извршити оптимално збијање материјала. У оквиру овог рада приказује се техничка регулатива која регулише контролу збијености при изградњи железничке ...
    доњи строј, техничка регулатива, насип, збијеност, контрола
    ... elevation of the planum of the foundation soil from the projected elevation is ± 2.5 cm for soil or improved soil, and ± 4.0 cm for cuts in the rock mass. The required degree of compaction of the foundation soil Rc* should be higher than: 98% f 92% for a layer > 2 m below the planum of the railway ...

  • A survey of greenhouse gases production in central European lignites

    Anna Pytlak, Anna Szafranek-Nakonieczna, Weronika Goraj, Izabela Śnieżyńska, Aleksandra Krążała, Artur Banach, Ivica Ristović, Mirosław Słowakiewicz, Zofia Stępniewska (2021)
    Lignit, Gasovi sa efektom staklene bašte, Ugljen dioksid, Metan, Azotni oksid
    ... dioxide production rate was determined based on the linear increase in the concentration of a given gas in time and expressed as a nmol per gram dry mass per day (nmol g-1 day-1). 2.6. Global warming potential (GWP) calculations The GWP for each lignitewas calculated for the 100 year horizon, in- cluding ...
    ... organic carbon; N-NO3, N-NH4P-PO4, SD – standard deviation (sample abbreviations as in Table 1). Symbol Moisture TOC N-NO3 N-NH4 P-PO4 % % mg kg dry mass−1 Mean ±SD Mean ±SD Mean ±SD Mean ±SD Mean ±SD KBR 51.92 1.31 63.26 1.88 0.11 0.02 37.57 0.51 6.55 0.74 VLN-W1 23.58 0.37 66.73 2.62 0.00 0.00 94 ...