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Wyszukujesz frazę "Saravanakumar, S." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Packing Parameters in Graphs
Autorzy:
Sahul Hamid, I.
Saravanakumar, S.
Powiązania:
https://bibliotekanauki.pl/articles/31232984.pdf
Data publikacji:
2015-02-01
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
packing number
open packing number
Opis:
In a graph $G = (V,E)$, a non-empty set $S ⊆ V$ is said to be an open packing set if no two vertices of $S$ have a common neighbour in $G$. An open packing set which is not a proper subset of any open packing set is called a maximal open packing set. The minimum and maximum cardinalities of a maximal open packing set are respectively called the lower open packing number and the open packing number and are denoted by $ρ^L_o$ and $ρ^o$. In this paper, we present some bounds on these parameters.
Źródło:
Discussiones Mathematicae Graph Theory; 2015, 35, 1; 5-16
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of Empirical Relationships for Prediction of Mechanical and Wear Behavior of Copper Matrix Surface Composite by Friction Stir Processing Technique
Autorzy:
Saravanakumar, S.
Gopalakrishnan, Saravanan
Kalaiselvan, K.
Powiązania:
https://bibliotekanauki.pl/articles/2049739.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
friction stir processing
microstructure
microhardness
wear
Opis:
In this investigation, Copper Matrix Surface Composites (CMSCs) were reinforced with various ceramic particles like Aluminum Nitrate (AlN), Titanium diboride (TiB2), and Rice Husk Ash (RHA) are used to increase the metallurgical and mechanical properties by Friction Stir Processing (FSP). The Design of the Experiment (DOE) Taguchi L9 orthogonal array method was used. The process parameters considered were groove width and various types of reinforcement particles. The fabrication of CMSCs was achieved by using optimized process parameters, such as the tool transverse speed of 40 mm/min, rotational tool speed of 1000 rpm, and an axial load of 10 kN with one pass. The influence of FSP process parameters on CMSCs in the stir zone is observed through optical microscope (OM), Field Emission Scanning Electron Microscope (FESEM), and Transmission Electron Microscope (TEM). Mechanical properties such as microhardness and wear rate are studied and compared. It reveals that good interfacial bonding was produced between ceramic particles in CMSCs. TiB2 reinforced with copper matrix surface composites enhance microhardness and had a lesser wear rate.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 2; 617-626
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Mn Doping on the Structural, Optical and Magnetic Properties of $SnO_2$ Nanoparticles
Autorzy:
Saravanakumar, M.
Agilan, S.
Muthukumarasamy, N.
Rukkumani, V.
Marusamy, A.
Ranjitha, A.
Powiązania:
https://bibliotekanauki.pl/articles/1400508.pdf
Data publikacji:
2015-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.60.Ej
78.60.Lc
61.46.Df
68.37.Hk
68.37.Og
Opis:
Undoped and Mn doped $SnO_2$ prepared by co-precipitation method exhibits nanocrystalline nature with prominent peaks along (110), (101), (211), and (310) planes. All the prepared samples are nanocrystalline with crystallite size lying in the range of 4.8-5.6 nm. The prepared $SnO_2$ nanoparticles exhibit single tetragonal crystalline phase. The high resolution transmission electron microscopy images show that the particles are nanocrystalline in nature. The composition of the prepared samples have been analyzed using energy dispersive analysis of X-rays spectra. The photoluminescence spectroscopy shows the recombination of electrons in singly occupied oxygen vacancies with photoexcited holes in the valence band. Broad UV emission at 426 nm is observed in photoluminescence. UV-vis absorption spectral studies showed a peak at 385 nm. Magnetic measurements revealed that all the doped samples exhibit room temperature ferromagnetism, which is identified as an intrinsic characteristic obtained on doping. Pure SnO_2 nanoparticles showed diamagnetism, $SnO_2$ with lower Mn content show larger magnetization and with increasing Mn content the retentivity and coercivity are found to decrease.
Źródło:
Acta Physica Polonica A; 2015, 127, 6; 1656-1661
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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