Results 1 to 10 of about 34,618 (252)
Photonics, 2021 Partially coherent optical vortices have been applicated widely to reduce the influence of atmospheric turbulence, especially for free-space optical (FSO) communication.
Jiao Wang +5 more
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k路覆盖图的新充分条件(New sufficient conditions on k -path-coverable graphs)
Zhejiang Daxue xuebao. Lixue ban, 2019 Let G be a simple connected graph of order n. A graph G is k-path-coverable if its vertex set V ( G ) can be covered by kor fewer vertex-disjoint paths. In this paper, we give some new sufficient conditions for a graph to be k-path-coverable in terms of ...
JIAHuicai(贾会才)
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Mathematics, 2022 This study focuses on tensor Z-eigenvalue localization and its application in the geometric measure of entanglement for multipartite quantum states. A new Z-eigenvalue localization theorem and the bounds for the Z-spectral radius are derived, which are ...
Liang Xiong +3 more
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On distance signless Laplacian spectrum and energy of graphs
Electronic Journal of Graph Theory and Applications, 2018 The distance signless Laplacian spectral radius of a connected graph G is the largest eigenvalue of the distance signless Laplacian matrix of G, defined as DQ(G) = Tr(G) + D(G), where D(G) is the distance matrix of G and Tr(G) is the diagonal ...
Abdollah Alhevaz +2 more
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The normalized distance Laplacian
Special Matrices, 2021 The distance matrix 𝒟(G) of a connected graph G is the matrix containing the pairwise distances between vertices. The transmission of a vertex vi in G is the sum of the distances from vi to all other vertices and T(G) is the diagonal matrix of ...
Reinhart Carolyn
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图的补距离矩阵谱半径的最大值(On maximal spectral radius of complementary distance matrix of graphs)
Zhejiang Daxue xuebao. Lixue ban, 2013 We determine the graphs with maximal spectral radius of the complementary distance matrix among simple connected graphs with fixed order and matching number and diameter less than or equal to 2.
SULi(苏莉), LIHong-hai(李红海)
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Frontiers in Physics, 2023 When analyzing the transmission characteristics of LEDs for long-distance lighting and communication applications, the light field is commonly assumed to be fully incoherent. However, in reality, the LED light source emits partially coherent light with a
Zhifang Miao +4 more
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Atmosphere, 2023 Very Low Frequency (VLF) waves radiated from ground-based transmitters are crucial for long-distance communication and underwater navigation. These waves can reflect between the Earth’s surface and the ionosphere for Earth–ionosphere waveguide ...
Honggeng Cai +4 more
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Inequalities for Distance Signless Laplacian Matrix Under Minimum-Degree Constraints
Journal of MathematicsFor a connected graph G of order n, let DG denote its distance matrix and let TrG be the diagonal matrix formed by the vertex transmissions. The distance signless Laplacian of G is defined by DQ=DG+TrG.
Mohd Abrar Ul Haq, S. Pirzada, Y. Shang
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Spectral and Sharp Sufficient Conditions for Graphs to Admit a Strong Star Factor
MathematicsLetGbe a graph. An odd [1,k]-factor of a graph G is a spanning subgraph H of G such that degH(v) is odd and 1⩽degH(v)⩽k for every v∈V(G) where k is a positive odd integer. We call a spanning subgraph H of a graph G a strong star factor if every component
Fengyun Ren, Shumin Zhang, He Li
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