Hindawi, Scientific World Journal, (2015), p. 1-2
DOI: 10.1155/2015/689457
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The preparation of this special issue has been partially supported by National Natural Science Foundation of China (Program no. 11301415), Natural Science Basic Research Plan in Shaanxi Province of China (Program no. 2013JQ1020), Shaanxi Provincial Research Plan for Young Scientific and Technological New Stars (Program no. 2014KJXX-73), and Scientific Research Program Funded by Shaanxi Provincial Education Department of China (Program no. 2013JK1098). As the guest editors of this special issue, we would like to thank all the contributors for their submissions. We are highly grateful to our reviewers for their insightful comments and valuable suggestions.