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Wyświetlanie 1-5 z 5
Tytuł:
Adsorption Kinetics of Reactive Dyes on Ash from Town Heating Plant
Autorzy:
Djordjevic, D.
Stojiljkovic, D.
Smelcerovic, M.
Powiązania:
https://bibliotekanauki.pl/articles/205104.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
kinetics
reactive dye
adsorption
ashes
Opis:
In order to investigate the mechanism of adsorption of reactive dyes from the textile industry on ash from heating plant produced by brown coal combustion, some characteristic sorption constants are determined using Langergren adsorption equations for pseudo-first and pseudo-second order. Combined kinetic models of pseudo-first order and pseudo-second order can provide a simple but satisfactory explanation of the adsorption process for a reactive dye. According to the characteristic diagrams and results of adsorption kinetic parameters of reactive dyes on ashes, for the applied amounts of the adsorbents and different initial dye concentrations, it can be concluded that the rate of sorption is fully functionally described by second order adsorption model. According to the results, the rate constant of pseudo-second order decreases with increasing initial dye concentration and increases with increasing amount of adsorbent – ash.
Źródło:
Archives of Environmental Protection; 2014, 40, 3; 123-135
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of pH adjusted with different acids on the dyeability of polyester fabric
Autorzy:
Miljkovic, M. M.
Djordjevic, D. M.
Miljkovic, V. M.
Stamenkovic, M.
Stepanovic, J.
Powiązania:
https://bibliotekanauki.pl/articles/949502.pdf
Data publikacji:
2014
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
polyester
dyeing
disperse
dyes
pH
AIDS
Opis:
The influence of using formic, oxalic, citric, tartaric, hydrochloric, nitric, sulphuric and phosphoric acid for dyebath pH adjustment was investigated upon the dyeing of polyester fabric with CI Disperse Yellow 60. The positions of colour in CIELab coordinates of the samples dyed with the addition of tested acids were assessed and compared to those dyed with the addition of acetic acid. It was found that the differences in dyeabilities obtained with the addition of citric, oxalic, hydrochloric, nitric and sulphuric acid are entirely acceptable according to both M&S 83A and CMC (2:1) standards in comparison to the dyeability obtained with the addition of acetic acid.
Źródło:
Polish Journal of Chemical Technology; 2014, 16, 4; 1-5
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Challenges for nurse rostering problem and opportunities in hospital logistics
Autorzy:
Simić, D.
Simić, S.
Milutinović, D.
Djordjević, J.
Powiązania:
https://bibliotekanauki.pl/articles/333351.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
nurse rostering problem
scheduling
healthcare
metaheuristics
logistic approach
problem dyżurów pielęgniarskich
harmonogram
opieka zdrowotna
metaheurystyka
podejście logistyczne
Opis:
In the last 45 years nurse scheduling has received considerable attention in the research community. Nurse rostering can be described as a task of finding a duty roster for a set of nurses in such a way that the rosters comply with work regulations and meet the management’s requests. The objective varies from minimizing the costs of float nurses or minimizing under-staffing to maximizing the degree to which the nurses’ requests are met. In logistics, one aspect is optimization of the steady flow of materials through a network of transport links and storage nodes, and the other is, coordination of a sequence of resources, such as staffing and scheduling clinical resources. The period up to 2000 is characterized by using mathematical programming and objective functions to solve nurse rostering problem. In the period after 2000 the focus of researches aimed at solving nurse rostering and scheduling problem becomes implementation of meta-heuristics and multi-objective functions. The aim of this paper is to present the latest researches conducted in last ten years.
Źródło:
Journal of Medical Informatics & Technologies; 2014, 23; 195-202
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reparation of damaged forging dies by hard facing (HF) technology
Autorzy:
Lazic, V.
Arsic, D.
Nikolic, R. R.
Aleksandrovic, S.
Milosavljevic, D.
Djordjevic, M.
Cukic, R.
Powiązania:
https://bibliotekanauki.pl/articles/111606.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
forging dies
hard facing (HF)
filler metals (FM)
hardness
microstructure
matryce kuźnicze
napawanie
spoiwa
twardość
mikrostruktura
Opis:
The forging dies are in exploitation exposed to elevated temperatures and variable impact loads, both compressive and shear. Steels for manufacturing of these tools must endure those loads while maintaining mechanical properties and being resistant to wear and thermal fatigue. For those reasons, the alloyed steels are used for making the forging dies, though they have less weldability, because alloying increases proneness to hardening. Any reparatory hard facing (HF) of the damaged dies would require the specially adjusted technology to the particular piece. In this paper reparatory hard facing of dies used for forging pieces in the automobile industry is considered. Prior to reparatory hard facing of the real tools, numerous experimental hard facings on models were performed. All the model hard facings were done on the same steels which were used for production of the real forging dies. To define the optimal hard facing technology one needs to derive the optimal combination of the adequate heat treatment(s), to select the proper filler metals and the welding procedure. The established optimal HF technology was applied to real forging dies whose service life was further monitored in conditions of exploitation.
Źródło:
Production Engineering Archives; 2015, 6, 1; 26-29
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Statistical modeling of copper losses in the silicate slag of the sulfide concentrate smelting process
Autorzy:
Savic, M. V.
Djordjevic, P. B.
Mihajlovic, I. N.
Zivkovic, Z. D.
Powiązania:
https://bibliotekanauki.pl/articles/778781.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
modeling
copper concentrate
smelting process
copper losses
slag
ANFIS
Opis:
This article presents the results of the statistical modeling of copper losses in the silicate slag of the sulfide concentrates smelting process. The aim of this study was to define the correlation dependence of the degree of copper losses in the silicate slag on the following parameters of technological processes: SiO2, FeO, Fe3O4, CaO and Al2O3 content in the slag and copper content in the matte. Multiple linear regression analysis (MLRA), artificial neural networks (ANNs) and adaptive network based fuzzy inference system (ANFIS) were used as tools for mathematical analysis of the indicated problem. The best correlation coefficient (R2 = 0.719) of the final model was obtained using the ANFIS modeling approach.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 3; 62-69
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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