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Упит dcterms_subject_txt:unit weight

140 items

  • Phase relations and physical indicators of municipal waste from old landfills in Serbia

    Dragoslav R Rakić, Irena G Basarić Ikodinović, Jovana M Janković, Tina D Đurić (2021)
    Due to certain similarities of municipal waste and soil, usually for the determination of basic parameters of physical state, laboratory and field tests which are common in geotechnical investigations are used. It is often to construct an apparatus for special purpose to perform some specific laboratory and field tests. Therefore, different values of indicators of municipal waste physical state can be found in the literature. The basic reasons should be found in different definitions and methods that researchers use ...
    municipal waste, moisture content, unit weight, specific gravity, grain size distribution, porosityGeneral Computer Science
    ... the unit weight of water is known (y„ = 9.81 kN/m* ) as well as unit weight of solid particles (ys). The most common parameters are: dry unit weight (ya) expressed by weight-volume ratio - W„/V; porosity (n) expressed by volume ratio - V,/V and moisture content (w) expressed by weight ratio ...
    ... the unit weight increases due to components that are tend to absorb water. In this case, average unit weight of components is equal to: 1 — AY, = 1+—· ž W..__—— 7 “/d[ o J s Ti (5) where: Ayi - increase of unit weight of component i In the literature we can find values that range in wide ...
    ... influences on average unit weight. As an illustrative example for this, we can specify “PET” packaging, or a can whose unit weight is Y=2 kN/m? when it is empty, or around y = 12 kN/m* when it is filled with fluid, and when it is compressed under high pressures its unit weight is approximate to ...

  • Određivanje zbijenosti starog komunalnog otpada

    Jovana Janković, Dragoslav Rakić, Irena Basarić Ikodinović, Tina Đurić (2021)
    Bez obzira na savremene tretmane komunalnog otpada u svetu, u Srbiji je i dalje najčešći vid odlaganja na komunalne deponije, pa zbijanje otpada predstavlja jednu od ključnih faza formiranja deponije. Na ovaj način znatno se smanjuje zapremina otpada, ubrzava proces degradacije i produžava radni vek deponije. Zbog toga su geotehničke karakteristike komunalnog otpada prilikom zbijanja, veoma bitne kako u fazi projektovanja tako i u fazi izgradnje deponije i optimizacije prostora. Tu se pre svega misli na maksimalnu suvu zapreminsku ...
    komunalni otpad, deponija, Proktorov opit, optimalna vlažnost, maksimalna suva zapreminska težina

  • Underground loading-haulage equipment selection with application of topsis method with different weighting methods of criteria

    Vladimir Krivošić, Luka Crnogorac, Rade Tokalić (2024)
    The choice of adequate mining machines is one of the most complex problems in the underground exploitation of mineral raw materials. The weight of such a decision is reflected in the high prices of these machines and the occurrence of even greater costs during their use if their choice was wrongly conceived. There are numerous examples from practice in which such decisions were made solely on the basis of comparing the prices of machines, without considering any of the ...
    utovarno-transportna mehanizacija, izbor, TOPSIS, entropija, standardna devijacija, težina kriterijuma

  • Multi-Criteria Approach for Selecting Optimal Dozer Type in Open-Cast Coal Mining

    Ivan Janković, Stevan Đenadić , Dragan Ignjatović , Predrag Jovančić , Tomislav Šubaranović, Ivica Ristović (2019)
    Analitički hijererhijski proces (AHP), dozeri, eksploatacija uglja, površinski kopovi
    ... Calculated weight coefficients by AHP analysis. Weightiness of Sub-Criteria 0.250 0.250 0.250 0.250 Criteria TP EcP ExP SP Alternatives Weight coefficient of T1 0.340 0.180 0.422 0.475 Weight coefficient of T2 0.213 0.253 0.310 0.249 Weight coefficient of T3 0.186 0.190 0.095 0.212 Weight coefficient ...
    ... T1 T2 T3 T4 Weight T1 T2 T3 T4 Weight T1 1 1 2 2 0.333 T1 1 1 2 1 1 0.200 T2 1 1 2 2 0.333 T2 2 1 2 2 0.400 T3 1 2 1 2 1 1 0.167 T3 1 1 2 1 1 0.200 T4 1 2 1 2 1 1 0.167 T4 1 1 2 1 1 0.200 λmax 4 λmax 4 CI 0 CI 0 CR 0 CR 0 Towing Force (TF) Undercarriage Type (UT) T1 T2 T3 T4 Weight T1 T2 T3 T4 ...
    ... criteria weight, sub-criteria and alternatives weights, which are afterwards combined into the total priority alternatives; 4. Checking the consistency of the decision-maker. Energies 2019, 12, x FOR PEER REVIEW 4 of 16 3. The calculation of the individual priorities of the criteria weight, sub-criteria ...

  • The determination unit weight of municipal waste

    Rakić Dragoslav, Čaki Laslo, Ćorić Slobodan, Basarić Irena (2013)

  • Fuzzy optimization in hydrodynamic analysis of groundwater control systems: Case study of the pumping station “Bezdan 1”, Serbia

    Dragoljub Bajić, Dušan Polomčić (2014)
    A groundwater control system was designed to lower the water table and allow the pumping sta-tion “Bezdan 1” to be built. Based on a hydrodynamic analysis that suggested three alternative solutions, mul-ticriteria optimization was applied to select the best alternative. The fuzzy analytic hierarchy process methodwas used, based on triangular fuzzy numbers. An assessment of the various factors that influenced the selec-tion of the best alternative, as well as fuzzy optimization calculations, yielded the “weights” of the alternativesand the ...
    groundwater lowering, groundwater management scenario, fuzzy analytic hierarchy process,expert knowledge, triangular fuzzy numbers, linguistic variables
    ... ultimate weights of the alternatives are determined. They are obtained by multiplying the weight vectors derived from the criterion matrix by the weight vectors from Step 6. The alternative with the greatest weight vector value is the best alternative. Results and Discussion The fuzzy extent analysis ...
    ... (BRYSON 1995). This results in a normalized weight vector in the form of a classical non-fuzzy number, whose maxi- mum value is 1: Step 6. In this step the alternatives are compared for each criterion separately. Matrices are produced and then the weight vectors determined following Steps 1 through ...
    ... Step 3, and the weight vectors obtained as: W’ = (0.9,1,0.81) Finally, the ultimate criterion weights were obta- ined through normalization: W = (0.33, 037, 0.3) Shown below are the criterion - based evaluation of alternatives (where three matrices were generated) and the ultimate weight vectors for ...

  • Development of integrated fuzzy model for mine management optimization

    Miodrag Čelebić, Sanja Bajić, Dragoljub Bajić, Dejan Stevanović, Duško Torbica, Vladimir Malbašić (2023)
    fuzzy logika, višekriterijumsko odlučivanje, ocenjivanje eksperata
    ... 'The result is a normalized weight priority vector in the form of a non-fuzzy number, whose maximum value is 1: W = (c (Ax),c(4>2),...,c (A„)T). Step 6. The alternatives are compared against each criterion individually. Thus, new matrices are defined and then the weight priority vectors determined ...
    ... 1 shows the criteria matrix values and the calculated weight coefHicients. The scores and weights are represented by triangular fuzzy numbers. Table 2 shows the scores of the alternatives relative to each criterion, as well as the weight coefHcients. Additionally, triangular fuzzy numbers are ...
    ... ... My) = V|(M > Mi)A(M > M»)A·--A(M > M)} = minV(M > Mi). Summing; everything; up yields c (Aij)=minV (S; > %), k=1,2,...,m;k X i. Step 4. Weight priority vectors are defined as W!= (c' (4i),C(A>),...,“ (An)T) where A4;(i= 1,2,...,n). 1416 M. Čelebić, S. Bajić, D. Bajić et al. Step 5. ...

  • Application of a Method for Intelligent Multi-Criteria Analysis of the Environmental Impact of Tailing Ponds in Northern Kosovo and Metohija

    Gordana Milentijević, Blagoje Nedeljković, Milena Lekić, Zoran Nikić, Ivica Ristović, Jelena Đokić (2016)
    flotacijska jalovišta, životna sredina, višekriterijumska analiza, ekologija, Trepča
    ... criteria estimation result essentially depends on their weight factors. For coupling the weight factor to the selected criterion, it the mixed approach was applied, using subjective and objective methods in order to achieve final integrated weight factors [20]. The analyzed criteria for all five flotation ...
    ... , 1 2 , 1, 2, 3, 4, 5, 6, 7, 8, 9 } (1) The basic results of the AHP method are weight criterion rate (W). The weight coefficients are calculated for each element at a certain level. The techniques for the weight coefficient vectors W recommended by Saaty include summarizing the comparison results’ ...
    ... value of weight coefficient and the value of the remaining three tailings is 0.0909. For criterion C8, geology, all tailings have identical weight coefficient which is 0.2. For criterion C9, general slope of a region, A4 Tvrd̄anski Do and A5 Bostanište 0.2889 have the greatest value of weight coefficient ...

  • Дефинисање параметра песковитог тла за потребе прорачуна слегања плиткох темеља преко CPTm и CPTu опита

    Александар Јаковљевић (2024)
    Дефинисање меродавних геотехничких параметара тла за потребе прорачуна слегања.(a и носивости)темељног тла један је од главних задатака инжењера геотехнике.Од поузданости ових параметара и последично резултата прорачуна слегања и носивости, директно зависи који ће се тип, врста и димензије темеља као и начин фундирања истог примењивати.Да би се поуздано дефинисали неопходни геотехнички параметри а потом и извели потребни прорачуни слегања, потребно је на првом месту познавање деформабилних карактеристика тла.Подаци о збијености тла могу се добити или лабораторијским испитивањима на претходно ...
    CPT, песак, слегање, параметри, корелације
    ... 0.00 +0.00 kPa SBTn description: Sand & silty sand Dr (%): 46.52 +4.19 Su ratio: 0.00 +0.00 p (degrees): 38.26 +0.87 ? O.C.R.: 0.00 +0.00 Unit weight: 17.39 +0.36 kN/m3 CPeT-IT v.2.0.2.5 - CPTU data presentation & interpretation software - Report created on: 28/12/2018, 08:19:16 2 Project file: ...
    ... results Permeability: 2.31E-05 +1.16E-05 m/s N60: 20.90 +2.91 blows Es: 62.83 +9.65 MPa Dr (%): 57.51 +3.05 q (degrees): 40.30 +0.51 9 Unit weight: 18.82 +0.43 kN/m3 Constrained Mod.: 78.75 +12.10 MPa Go: 78.75 +12.10 MPa Su: 0.00 +0.00 kPa Su ratio: 0.00 +0.00 O.C.R.: 0.00 +0.00 ...
    ... results Permeability: 5.55E-06 +3.35E-06 m/s N60: 14.39 +3.09 blows Es: 48.76 +9.76 MPa Dr (%): 42.17 +4.91 q (degrees): 37.32 +1.08 9 Unit weight: 17.98 +0.61 kN/m3 Constrained Mod.: 60.63 +12.36 MPa Go: 61.12 +12.23 MPa Su: 0.00 +0.00 kPa Su ratio: 0.00 +0.00 O.C.R.: 0.00 +0.00 ...

  • Development of an integrated model for open-pit-mine discontinuous haulage system optimization

    Miodrag Čelebić, Dragoljub Bajić, Sanja Bajić, Mirjana Banković, Duško Torbica, Aleksej Milošević , Dejan Stevanović (2024)
    equipment selection, mine mechanization, expert judgment, linguistic variables, MCDM, FAHP

  • Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers

    Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović (2024)
    This paper presents a dynamic California Bearing Ratio (CBRd) device that can be used on a prepared pavement foundation layer to obtain a certain parameter of the tested material in the laboratory and in situ in a direct and fast way. For the selected natural material (gravel), it is shown that the laboratory CBRd can be used to estimate the compaction and bearing capacity, because it correlates well with the parameters of the standard and modifed Proctor compaction tests. ...
    korelacija parametara, donji slojevi saobraćajnica, laboratorijska i terenska ispitivanja, dinamički kalifornijski indeks nosivosti CBRd
    ... each station using the pressure-settlement curve [12].In this process, certain items must be considered. Light-weight deflectometer The LWD is a portable device with a falling weight developed in Germany as an alternative to the SPLT, and measures the deformation (stiffness), that is, the level ...
    ... (typically heavy construction machin- ery). Instead, the CBR, test is performed by fixing the CBR attachment to the LWD device, where a falling weight is used to induce a defined impact load on the CBR piston. Then, the CBR, can be calculated based on an empirical formula [8], as follows: CBR ...
    ... (mm), and p is the maximum amplitude of the dy- namic load (N/mm?). Several factors can affect the measured CBR, value, including the falling weight, height offall, size (di- ameter) of the plate, plate contact stress, type and location of deflection transducer, use of load transducer, loading ...

  • Development Of The Serbian Geological Resources Portal

    Ranka Stanković, Jelena Prodanović, Olivera Kitanović, Velizar Nikolić (2011)
    ... search system includes advanced methods for ranking search results, based on weight factors associ- ated with specific fields in the function of search cri- teria. Since the data on available search fields, as well as the weight factors for each field, are located in the database, a simple change of these ...
    ... Namely, a number of entities and their attributes within the database corre- spond to each search criterion, and each entity/attrib- ute has certain weight factors which determine the rel- evance of the appearance of a resource within the set of results. Entering different search criteria is provided ...
    ... the server side expands the query by creating a matrix of keywords and field types which are searched for on one side, and a list of attributes and weight factors on the other. The query is subsequent- ly transformed into SQL (Structured Query Language) format. Expanded in this way, the query is used ...

  • Indexing of textual databases based on lexical resources: A case study for Serbian

    Ranka Stanković, Cvetana Krstev, Ivan Obradović, Olivera Kitanović (2015)
    In this paper we describe an approach to improvement of information retrieval results for large textual databases by pre-indexing documents using bag-of-words and Named Entity Recognition. The approach was applied on a database of geological projects financed by the Republic of Serbia in the last half century. Each document within this database is described by metadata, consisting of several fields such as title, domain, keywords, abstract, geographical location and the like. A bag of words was produced from these ...
    ... the basis of weight factors assigned to individual fields in the function of search criteria. Given the information available in the database, it is possible to add criteria and fine-tune the ranking output based on the number of occurrences of a keyword or phrase and the sum of the weight factors of the ...
    ... model of approximate matching, based on the frequency distribution of terms and documents. Two basic approaches are the vector space model, based on weight coefficients of terms, and the probabilistic model, based on relevance feedback. [14] In this paper we describe the motivation for developing an IR ...
    ... fields. Namely, each search criterion fits several different entities and their attributes within the database, and each entity/attribute in- cludes weight factors that determine the relevance of the appearance of the resource within the result set. One example can illustrate this: location is one search ...

  • 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
    ... the degree of compaction Rc* is applied here on the soil with a maximum grain size of 5 mm, and in relation to the maximum value of the unit weight in the dry state obtained by the experiment of laboratory compaction according to SRPS U.B1.038, ie according to St. Proctor Test. The following ...
    ... Instructions 338 were adopted for the control of compaction of the substructure of railway tracks by the dynamic method with a light falling weight (Light Weight Deflectometer) device on the JŽ railway network. In 2012, the Regulations on the design of reconstruction and construction of specific elements ...
    ... compaction Dpr and determining the correlation coefficient between Ev2 and Evd as well as the ratio Ev2/Ev1. Also, when testing with a light drop weight, the required moisture is not checked, and testing of layers is not performed in the same height profile, so the obtained results cannot be compared ...

  • Mean-based iterative methods for finding multiple roots in nonlinear chemistry problems

    Dejan Ćebić, Nebojša M. Ralević (2021)
    нелинеарне једначине, поступци засновани на срединама, вишеструки корени,

  • The Content of Toxic Metals in Agricultural Produce near a Coal Mine: Case Study KCB in Lazarevac, Serbia

    Ana Koprivica, Čedomir Beljić, Boris Vakanjac, Vesna Ristić Vakanjac, Marina Čokorilo Ilić (2018)
    Праћење и анализа концентрација токсичних метала (олово и кадмијум) у земљишту и усевима указују на то да пољопривредно земљиште у Србији углавном није загађено, а квалитет земљишта је природно добар. Због тога су таква земљишта погодна за органску пољопривреду. Сви уочени случајеви контаминације токсичним металима су само локалне природе, а резултат су ђубрива и пестицида, комуналног отпада, издувних гасова, оближњих производних објеката, топионица, рудника, јаловишта итд. Локације овог типа морају бити редовно прати и процењује статус земљишта и усева. ...
    токсични метали, олово, кадмијум, земљиште, усеви, одрживи развој

  • Primena AHP и WoEmetode u proceni podložnosti terena na kliženje za područje opštine Krupanj

    Biljana Abolmasov, Jelka Krušić, Katarina Andrejev, Miloš Marjanović, Ranka Stanković, Uroš Đurić (2017)
    ... terena na kliženje: višekri- terijumske AHP (Analytical Hierarchy Process) metode i metode uslovne verovatnoće, odnosno metode težine dokaza WoE (Weight of Evidence) primenjene na područje opštine Krupanj u zapadnoj Srbiji. Validacija dobijenih rezultata procene izvršena je za svaki dobijeni model ...
    ... susceptibility assessment in Krupanj municipality in western Serbia, using two different multicriteria methods: Analytical Hierarchy Process (AHP) and Weight of Evidence (WoE). AHP is based on quantified expert judgement on the individual importance of conditioning factors, as geological, morphological ...
    ... terena na kliženje: višekriterijumske AHP (Analytical Hierarchy Process) metode i metode uslovne verovatnoće, odnosno metode težine dokaza WoE (Weight of Evidence). Na oba modela izvršena je provera tačnosti i uporedna analiza dobijenih rezultata. Rezultati procene podložnosti predstavljaju dobru ...

  • Paleomagnetic contribution to resolving the tectonic evolution of the Drina–Ivanjica Unit, Internal Dinarides

    Máté Velki, Emő Márton, Vesna Cvetkov, Szilvia Kövér (2023)
    Internal Dinarides, Drina–Ivanjica Unit, paleomagnetism, vertical axis rotations

  • 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
    ... t LC phases of HSs are estimated – production, transport, use4, and recycling and/or final disposal. Emission factors (emissions per unit of the physical weight of materials) are obtained from the Ecoinvent 3.0 database (expressed by GWP100 per kg) [24] and the EPA stationary combustion emission ...
    ... of HSs are given in Table 2 [21], [22]. The materials mentioned in Table 2 form the bulk of the furnace’s weight (90%). Other materials that constitute a smaller fraction of the appliance weight were not considered for the analysis. Boban Pavlović, Dejan Ivezić. Marija Živković 432 Table ...
    ... LINE MBS MBS PELLET 6 - 10 KW Capacity 6.5 kW Capacity 8.5 kW Dimensions (HxWxL) 740x720x570 mm Dimensions (HxWxL) 980x560x490 mm Weight 71 kg Weight 108 kg Steel 63 kg Steel 97 kg Aluminum 3.5 kg Aluminum 6 kg 4 LIFE CYCLE ASSESSMENT All stages in a product’s life cycle can result ...

  • Uniaxial compressive strength test before and after standard fire test on rock mass

    Stefan Mitrović, Goran Todorović, Bojan Kostić, Milica Mirković-Marjanović, Nikola Božović, Marija Krstić, Aleksandar Erić, Radovan Gospavić, Snežana Ilić, Aleksandar Kijanović (2022)
    ... be smooth and straight, with no bumps. Samples must be dried at 70 ± 5 ° C to constant weight before testing. A constant mass is considered to have been reached when the difference between two consecutive weight measurements, performed at 24 ± 2 h intervals, is not greater than 0,1% of mass of test ...
    ... uniaxial compressive strength of samples that were not exposed to fire depends on internal structure of samples, since dimensions of samples, their weight and surface area are approximately equal. Testing uniaxial compressive strength of samples (7-12) after standard fire test was not possible ...