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The Barabási-Albert (BA) model is extended to include the concept of local world and the microscopic event of adding edges. With probability p, we add a new node with m edges which preferentially link to the nodes presented in the network; with probability 1− p, we add m edges among the present nodes. A node is preferentially selected by its degree to add… (More)

- Zhongzhi Zhang, Bin Wu, Hongjuan Zhang, Shuigeng Zhou, Jihong Guan, Zhigang Wang
- Physical review. E, Statistical, nonlinear, and…
- 2010

The family of Vicsek fractals is one of the most important and frequently studied regular fractal classes, and it is of considerable interest to understand the dynamical processes on this treelike fractal family. In this paper, we investigate discrete random walks on the Vicsek fractals, with the aim to obtain the exact solutions to the global… (More)

- Zhongzhi Zhang, Yi Qi, Shuigeng Zhou, Wenlei Xie, Jihong Guan
- Physical review. E, Statistical, nonlinear, and…
- 2009

The explicit determinations of the mean first-passage time (MFPT) for trapping problem are limited to some simple structure, e.g., regular lattices and regular geometrical fractals, and determining MFPT for random walks on other media, especially complex real networks, is a theoretical challenge. In this paper, we investigate a simple random walk on the the… (More)

- Yuan Lin, Bin Wu, Zhongzhi Zhang
- Physical review. E, Statistical, nonlinear, and…
- 2010

Relatively general techniques for computing mean first-passage time (MFPT) of random walks on networks with a specific property are very useful since a universal method for calculating MFPT on general graphs is not available because of their complexity and diversity. In this paper, we present techniques for explicitly determining the partial mean… (More)

- Chunmei Guo, Yi Chen, +5 authors Zhongzhi Zhang
- Bioresource technology
- 2014

This paper investigated the enhancement of the COD reduction of an oilfield wastewater treatment process by installing air-lift tubes and adding an activated carbon bioreactor (ACB) to form a combined hydrolysis acidification and bio-contact oxidation system with air-lift tubes (HA/air-lift BCO) and an ACB. Three heat-resistant bacterial strains were… (More)

- Weizhang Zhong, Zhongzhi Zhang, Yijing Luo, Wei Qiao, Meng Xiao, Min Zhang
- Bioresource technology
- 2012

A batch anaerobic test was conducted to evaluate the effects of adding high carbon content of corn straw to the digestion of Taihu blue algae to attain an optimal C/N ratio for higher methane yield. The addition of corn straw in algae at a C/N ratio of 20/1 increased methane yield by 61.69% at 325 mL g(-1)VS(-1) (compared with 201 mL g(-1) VS(-1) of algae… (More)

We propose a simple algorithm which produces a new category of networks, high dimensional random Apollonian networks, with small-world and scale-free characteristics. We derive analytical expressions for their degree distributions and clustering coefficients which are determined by the dimension of the network. The values obtained for these parameters are… (More)

- Mang Lu, Zhongzhi Zhang, Wei Qiao, Yueming Guan, Meng Xiao, Chong Peng
- Journal of hazardous materials
- 2010

The degradation of bioremediation residues by hydrogen peroxide in petroleum-contaminated soil was investigated at circumneutral pH using a Fenton-like reagent (ferric ion chelated with EDTA). Batch tests were done on 20 g soil suspended in 60 mL aqueous solution containing hydrogen peroxide and Fe(3+)-EDTA complex under constant stirring. A slurry reactor… (More)

- Mang Lu, Zhongzhi Zhang, +4 authors Yingchun Guan
- Bioresource technology
- 2010

A laboratory study was conducted to enhance removal of residual contaminants after composting in a highly petroleum-contaminated soil by combining Fenton-like pretreatment with biodegradation. The contaminants were characterized by Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) during soil treatment. The optimum molar ratio of… (More)

- Weihua Zhan, Zhongzhi Zhang, Jihong Guan, Shuigeng Zhou
- Physical review. E, Statistical, nonlinear, and…
- 2011

In a recent paper, Zhan, Zhang, Guan, and Zhou [Phys. Rev. E 83, 066120 (2011)] presented a modified adaptive genetic algorithm (MAGA) tailored to the discovery of maximum modularity partitions of the node set into communities in unipartite, bipartite, and directed networks. The authors claim that "detection of communities in unipartite networks or in… (More)