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- Zhongxun Zhu, Liansheng Tan, Zhongyi Qiu
- Discrete Applied Mathematics
- 2014

Let G be a simple connected graph on n vertices and Î»1, Î»2, . . . , Î»n be the eigenvalues of the adjacency matrix of G. The Estrada index of G is defined as EE(G) = îµ±n i=1 e Î»i . Let Tn be the classâ€¦ (More)

- Zhongxun Zhu
- 2011

Let B(n, g) be the class of bicyclic graphs on n vertices with girth g. In this paper, the graphs in B(n, g) with the largest signless Laplacian spectral radius are characterized.

- Zhongxun Zhu
- Ars Comb.
- 2016

- Zhongxun Zhu, Cao Yuan, Eric Ould Dadah Andriantiana, Stephan G. Wagner
- Discrete Mathematics
- 2014

For a graph G, the Hosoya index and the Merrifield-Simmons index are defined as the total number of its matchings and the total number of its independent sets, respectively. In this paper, weâ€¦ (More)

- Liansheng Tan, Zhongxun Zhu, Fei Ge, Naixue N. Xiong
- IEEE Transactions on Systems, Man, andâ€¦
- 2015

In wireless networks, it is still a challenge to allocate the limited resources among users to meet their specific quality of service (QoS) requirements, especially when the users have differentâ€¦ (More)

- Liansheng Tan, Zhongxun Zhu, Wei Zhang, Gong Chen
- Int. J. Communication Systems
- 2014

Optimization theory and nonlinear programming method have successfully been applied into wire-lined networks (e.g., the Internet) in developing efficient resource allocation and congestion controlâ€¦ (More)

- Liansheng Tan, Zhongxun Zhu, Cao Yuan, Wei Zhang
- Trans. Emerging Telecommunications Technologies
- 2014

The resource (bandwidth) allocation in a network is usually casted into a so-called network utility maximization (NUM) problem, which solution strategy has successfully generated distributedâ€¦ (More)

- Cao Yuan, Hongcai Feng, Yaqin Li, Zhongxun Zhu
- 2009 5th International Conference on Wirelessâ€¦
- 2009

This paper studies the utility-maximization resource allocation problem for soft QoS traffic in wireless networks, which demands certain amount of bandwidth for normal operation but allows someâ€¦ (More)

- Shuchao Li, Zhongxun Zhu
- Electr. J. Comb.
- 2010

Let Tn be the class of tricyclic graphs on n vertices. In this paper, a sharp lower bound for the total number of matchings of graphs in Tn is determined.

- Renbin Sun, Zhongxun Zhu, Liansheng Tan
- Ars Comb.
- 2012

For a graph G, the Merrifield-Simmons index i(G) and the Hosoya index z(G) are defined as the total number of independent sets and the total number of matchings of the graph G, respectively. In thisâ€¦ (More)