Autor: Luo, Jing - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Extremal unicyclic graphs with minimal distance spectral radius
Autorzy:: Lu, Hongyan
Luo, Jing
Zhu, Zhongxun
Powiązania:: https://bibliotekanauki.pl/articles/30148716.pdf
Data publikacji:: 2014-11-01
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:: distance matrix
distance spectral radius
unicyclic graph
matching
Opis:: The distance spectral radius $ρ(G)$ of a graph $G$ is the largest eigenvalue of the distance matrix $D(G)$. Let $\mathcal{U} (n,m)$ be the class of unicyclic graphs of order $n$ with given matching number $m (m ≠ 3)$. In this paper, we determine the extremal unicyclic graph which has minimal distance spectral radius in $\mathcal{U} (n,m)$ \ $C_n$.
Źródło:: Discussiones Mathematicae Graph Theory; 2014, 34, 4; 735-749
2083-5892
Pojawia się w:: Discussiones Mathematicae Graph Theory
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: On the Laplacian Coefficients of Tricyclic Graphs with Prescribed Matching Number
Autorzy:: Luo, Jing
Zhu, Zhongxun
Wan, Runze
Powiązania:: https://bibliotekanauki.pl/articles/31341799.pdf
Data publikacji:: 2017-08-01
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:: Laplacian characteristic polynomial
Laplacian-like energy
tricyclic graph
Opis:: Let $ \phi (L(G)) = \text{det}(x I−L(G)) = \Sigma_{k=0}^n (−1)^k c_k (G) x^{n−k} $ be the Laplacian characteristic polynomial of $G$. In this paper, we characterize the minimal graphs with the minimum Laplacian coefficients in $ \mathcal{G}_{n,n+2} (i) $ (the set of all tricyclic graphs with fixed order $n$ and matching number $i$). Furthermore, the graphs with the minimal Laplacian-like energy, which is the sum of square roots of all roots on $ \phi (L(G)) $, is also determined in $ \mathcal{G}_{n,n+2} (i) $.
Źródło:: Discussiones Mathematicae Graph Theory; 2017, 37, 3; 505-522
2083-5892
Pojawia się w:: Discussiones Mathematicae Graph Theory
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Analysis of marine risers subjected to shoal/deep water in the installation process
Autorzy:: Wang, Yikun
Luo, Songxiang
Yang, Mo
Qin, Tao
Zhao, Jing
Yu, Gang
Powiązania:: https://bibliotekanauki.pl/articles/32899597.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: sail catamaran
green shipping
zero emission
hybrid propulsion
Opis:: The dynamics of the installation process of marine risers subjected to shoal/deep seawater is studied. The riser is assumed to be a cantilevered Euler‒Bernoulli beam. The upper end of the riser is clamped on the vessel or the drilling platform. The lower end of the riser is connected to the Blowout Preventer Stack (BOPs) and Lower Marine Risers Package (LMRP). The lateral fluid forces induced by the sea wave and sea current are introduced into the governing equations of motion. The lateral displacement and stress distributions of the riser are obtained by solving the governing equation of the riser via Galerkin’s discretisation scheme and a fourth-order Runge‒Kutta algorithm. The results indicate that the riser exhibits different behaviours under various depths because of the different distributions of the flow velocity ranging from the sea surface to the seabed. In the case of shoal water, the dynamics of the riser are dominated by the sea wave, while in the case of deep water it is affected mainly by the sea current velocity and sea surface wind velocity.
Źródło:: Polish Maritime Research; 2022, 2; 43-54
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Synthesis and Theoretical Studies of a New Insensitive Explosive, 2’-Methyl-3-nitro-2’H-[1,3’-bi(1,2,4-triazole)]-5,5’-diamine
Autorzy:: Luo, J.
Liu, Y.
Wang, J.
Chai, T.
Yuan, J.
Chang, S.
Yu, Y.
Jing, S.
Ma, H.
Powiązania:: https://bibliotekanauki.pl/articles/358633.pdf
Data publikacji:: 2017
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: insensitive explosive
synthesis
theoretical studies
density functional theory
new 1,2,4-triazole derivative
Opis:: A new insensitive energetic material 2’-methyl-3-nitro-2’H-[1,3’-bi(1,2,4-triazole)]-5,5’-diamine (1) was prepared by a three-step synthesis from commercially available chemicals. The energetic title compound was comprehensively characterized by various means, including FT-IR, multinuclear (1H, 13C, 14N) NMR spectroscopy, elemental analysis, HPLC and thermal analysis. The sensitivities of the synthesized material towards various external stimuli (impact, friction) were determined according to the BAM method. The optimized structure and related thermodynamic parameters were obtained at the DFT-B3LYP/6-31+G** theoretical level. The detonation properties of the material were also predicted according to the Kamlet-Jacobs formulae and the Monte-Carlo method. The results show that the density, heat of formation, detonation velocity, detonation pressure, impact sensitivity and purity were 1.83 g/cm3, 369 kJ/mol, 7.52 km/s, 25.4 GPa, 82.3 J and 97.7%, respectively. In addition, the compound was an insensitive high explosive which could meet the requirements of high energetic materials.
Źródło:: Central European Journal of Energetic Materials; 2017, 14, 2; 269-280
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

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