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Упит dcterms_subject_txt:fuzzy dynamic TOPSIS

212 items

  • 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
    ... Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Correlation Between Dynamic CBR and Compaction ...
    ... results of California Bearing Ratio (CBR) research on stat- ic (classic) and dynamic methods with ash samples in the unsaturated state has been presented [5], and the correlations of the parameters of the laboratory dynamic California Bearing Ratio (CBR, ) with the com- paction properties of sandy ...
    ... deformation (stiffness), that is, the level of compaction of the material, in situ and obtains the dynamic modulus of deformation (E„) [13, 14|. In Serbia, these devices are not widespread because the dynamic modulus is not considered in the quality assessment and quality control of pavement layers. The ...

  • Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic

    Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)
    Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...
    mehaničke metode, proizvodnja nafte, fazi logika, donošenje odluka, optimizacija
    ... defined linguistic variables (i.e., fuzzy sets) are: very low, low, moderate, high, and very high. The expert assessment consists of linguistic variables and the extent to which they apply to the observed well. Figure 2. Fuzzy sets. In dependence of μ, fuzzy number (FN) can be presented in form ...
    ... j = 1, 2; μ = 0 for j = 3, ..., 10. Other fuzzy sets can be written as: low = (0/1, 0/2, 1/3, 1/4, 0.33/5, 0/6, 0/7, 0/8, 0/9, 0/10) moderate = (0/1, 0/2, 0/3, 0.5/4, 1/5, 1/6, 0.5/7, 0/8, 0/9, 0/10) Figure 2. Fuzzy sets. In dependence of µ, fuzzy number (FN) can be presented in form (1): FN ...
    ... C) into one (M) is performed by fuzzy composition, which is a model that provides the structure of indicators-influencing M performance. In other words, if the influence indicators A, B and C are presented as fuzzy numbers [20], their composition provides a fuzzy number which represents M. Max-min ...

  • Development of dynamic phenomena in the rock mass

    Ljubojev Milenko, Popović Ratomir, Rakić Dragoslav (2011)

  • Structural dynamic modification of a tubular collector

    Petrović Ana, Trišović Nataša, Maneski Taško, Golubović Zoran, Milošević-Mitić Vesna, Wei Li2, Grozdanović Ines (2015)

  • Dynamic behavior and stress field of excavator SchRs740 extended boom

    Petrović Branko, Petrović Ana, Ignjatović Dragan, Grozdanović Ines (2015)

  • Diagnostics of Bucket Wheel Excavator Discharge Boom Dynamic Performance and Its Reconstruction

    Brkić Aleksandar, Maneski Taško, Ignjatović Dragan, Jovančić Predrag, Spasojević Brkić Vesna (2014)

  • Determination of Optimal Parameters of Distributive Gas Pipeline by Dynamic Programming Method

    Danilović Dušan, Karović-Maričić Vesna, Ristović Ivica (2011)

  • Numerical and experimental diagnostic of dynamic behavior of the rotor-excavator construction

    Maneski Taško, Jovančić Predrag, Ignjatović Dragan, Milošević Mitić Vesna, Trišović Nataša (2011)

  • Melting and dynamic metasomatism of mixed harzburgite + glimmerite mantle source: implications for the genesis of orogenic potassic magmas

    Förster Michael, Prelević Dejan, Schmück Harald, Buhre Stephan, Veter Marina, Mertz-Kraus Regina, Foley Stephen, Jacob Dorrit (2016)

  • Assessment of the maximum possible extension of bucket wheel SchRs740 boom based on static and dynamic calculation

    Petrović Branko, Petrović Ana, Ignjatović Dragan, Grozdanović Ines, Kozak Dražan , Katinić Marko (2016)

  • Fuzzy Model for Risk Assessment of Machinery Failures

    Dejan V. Petrović, Miloš Tanasijević, Saša Stojadinović, Jelena Ivaz, Pavle Stojković (2020)
    The main goal of this research was the development of an algorithm for the implementation of negative risk parameters in a synthesis model for a risk level assessment for a specific machine used in the mining industry. Fuzzy sets and fuzzy logic theory, in combination with statistical methods, were applied to analyze the time picture state of the observed machine. Fuzzy logic is presented through fuzzy proposition and a fuzzy composition module. Using these tools, the symmetric position of the ...
    fazi teorija, rizik, otkaz rudarskih mašina
    ... A.; Zarandi, M.H.F. Fuzzy probabilistic expert system for occupational hazard assessmentin construction. Saf. Sci. 2017, 93, 16–28. [CrossRef] 11. Mahdevari, S.; Shahriar, K.; Esfahanipour, A. Human health and safety risks management in underground coal mines using fuzzy TOPSIS. Sci. Total Environ ...
    ... on fuzzy set theory that have been applied to safety and reliability, such as fuzzy FTA, fuzzy FMEA, fuzzy ETA, fuzzy Bayesian networks, fuzzy Markov chains, and fuzzy Petri nets. Similar analyses have been presented by Liu et al. [22]. Their review showed the potential applicability of fuzzy set ...
    ... , S. Dynamic spectrum management in 5G wireless networks: A real-life modeling approach. In Proceedings of the IEEE INFOCOM 2019—IEEE Conference on Computer Communications, Paris, France, 29 April–2 May 2019; pp. 2134–2142. [CrossRef] 26. Ivezić, D.; Tanasijević, M.; Ignjatović, D. Fuzzy approach ...

  • Extensive vibrations of the belt conveyer drive electromotor of a bucket wheel excavator as a result of intesified wear-and-tear of its mount support

    Vesna Damnjanović, Predrag Jovančić, Snežana Aleksandrović (2017)

  • Optimal dynamic management of exploitation life of the mining machinery: models with undefined interval

    Vujić Slobodan, Miljanović Igor, Maksimović Svetozar, Milutinović Aleksandar, Benović Tomo, Hudej Marijan, Dimitrijević Bojan, Čebašek Vladimir, Gajić Grozdana (2010)

  • Foliation impact on the dynamic properties of selected samples of the barrier dam site Prvonek: Right side

    Majstorović Jelena, Tokalić Rade, Lutovac Suzana, Savković Snežana (2016)

  • Optimal dynamic management of exploitation life of the mining machinery: models with limited interval

    Vujić Slobodan, Miljanović Igor, Boševski Stefko, Kasaš Karolj, Milutinović Aleksandar, Gojković Nebojša, Josipović Pejović Milena, Dimitrijević Bojan, Gajić Grozdana, Čebašek Vladimir (2010)

  • 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
    ... calculated according to Figure 4, representing the intersection between a fuzzy observation of displacement O(t) and fuzzy time series consisting of A1, A2, . . . , Ai. Figure 4. Relationship between fuzzy observation and fuzzy time series. The calculation of the membership function value of intersection ...
    ... Modelling fuzzy time series with multiple observations. Int. J. Innov. Comput. Inf. Control 2012, 8, 7415–7426. 21. Chen, S.M. Forecasting enrolments based on fuzzy time series. Fuzzy Sets Syst. 1996, 81, 311–319. [CrossRef] 22. Liang, C.T.; Hsue, C.C.; Ching, C.Y. Using Extracted Fuzzy Rules Based ...
    ... a defined universe of clustering, we apply the concept of fuzzy time series. Such series, which were first proposed by Song and Chissom, ref. [17] are based on fuzzy set theory proposed by Zadeh [18,19]. The most important advantage of fuzzy time series approaches is to be able to work with a very small ...

  • 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
    ... testing, determination of the dynamic modulus of deformation, Evd is obligatorily performed along with other tests and the stated correlation relations. Due to the fact that it is not standardized in the Regulations for main railways, tests by determining the dynamic modulus of deformation Evd are ...
    ... European countries, as follows: In 2006, 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 ...
    ... to Instruction 338, the conditions for the installation of the protective and transition layer are given. Table 1 shows the required values of the dynamic modulus of deformation Evd together with the required values of the modulus of deformation Ev2. Determining the correlation coefficient between the ...

  • Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels

    Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković (2023)
    drilling fluid formulation, upstream oil and gas, fluid dynamics, fluid loss control, gel

  • Multivarijabilni modeli upravljanja u rudarstvu

    Marjan M. Hudej (2014-02-03)
    osetljivost i rizik. Više pobuda generiše ovakvu atribuciju. Prva je, multivarijabilnostambijentalnih uslova i funkcionalna i strukturna složenost rudarskih sistema (čovek -priroda (radna sredina) - mašina – okruženje); Druga se odnosi na ne postojanje opštenaučne saglasnosti oko ocene pogodnosti modela za podršku odlučivanju i upravljanje.Treća, ako bi saglasnost i postojala, nije sigurno da bi raspoloživi modeli, metode i taktike,dale ekvivalentne rezultate za iste rudničke uslove. Četvrta, sistemske nauke još uveknemaju opšte prihvaćen i u praksi primenljiv algoritam izbora najboljeg rešenja ...
    rudarstvo, odlučivanje, upravljanje, model,multivarijabilno, multiatributno, multikriterijumsko
    ... ključni uticaj prilikom izbora načina paljenja. U radu su analizirane tri opcije paljenja mina, elektro detonator, kapisla i Nonel. Fazi logika (FUZZY TOPSIS pristup) je korišćena za rangiranje alternativa. Prema Marjan Hudej, doktorska disertacija: MULTIVARIJABILNI MODELI UPRAVLJANJA U RUDARSTVU ...
    ... of VIKOR and TOPSIS, European Journal of Operational Research, 156(2), 2004, 445-455. 64. Opricovic, S., Gwo-Hshiung, T., Extended VIKOR Method in Comparison with Outranking Methods, European Journal of Operational Research, Vol. 178, No 2, 2007, 514–529. 65. Opricovic, S., Fuzzy VIKOR with ...
    ... predstavljeno u radu koristi MADM pristup sa primenom metoda: TOPSIS i fazi TOPSIS u rešavanju problema projektovanja. Empirijski rezultati pokazali su da su predložene metode primenljive u rešavanju predmetnog problema. Zaključak je da je TOPSIS primenljiv i pogodan za precizno vrednovanje performansi ...

  • Multivarijabilni modeli upravljanja u rudarstvu

    Marjan M. Hudej (2014-02-03)
    osetljivost i rizik. Više pobuda generiše ovakvu atribuciju. Prva je, multivarijabilnostambijentalnih uslova i funkcionalna i strukturna složenost rudarskih sistema (čovek -priroda (radna sredina) - mašina – okruženje); Druga se odnosi na ne postojanje opštenaučne saglasnosti oko ocene pogodnosti modela za podršku odlučivanju i upravljanje.Treća, ako bi saglasnost i postojala, nije sigurno da bi raspoloživi modeli, metode i taktike,dale ekvivalentne rezultate za iste rudničke uslove. Četvrta, sistemske nauke još uveknemaju opšte prihvaćen i u praksi primenljiv algoritam izbora najboljeg rešenja ...
    rudarstvo, odlučivanje, upravljanje, model,multivarijabilno, multiatributno, multikriterijumsko
    ... ključni uticaj prilikom izbora načina paljenja. U radu su analizirane tri opcije paljenja mina, elektro detonator, kapisla i Nonel. Fazi logika (FUZZY TOPSIS pristup) je korišćena za rangiranje alternativa. Prema Marjan Hudej, doktorska disertacija: MULTIVARIJABILNI MODELI UPRAVLJANJA U RUDARSTVU ...
    ... of VIKOR and TOPSIS, European Journal of Operational Research, 156(2), 2004, 445-455. 64. Opricovic, S., Gwo-Hshiung, T., Extended VIKOR Method in Comparison with Outranking Methods, European Journal of Operational Research, Vol. 178, No 2, 2007, 514–529. 65. Opricovic, S., Fuzzy VIKOR with ...
    ... predstavljeno u radu koristi MADM pristup sa primenom metoda: TOPSIS i fazi TOPSIS u rešavanju problema projektovanja. Empirijski rezultati pokazali su da su predložene metode primenljive u rešavanju predmetnog problema. Zaključak je da je TOPSIS primenljiv i pogodan za precizno vrednovanje performansi ...