This research was partially funded by the National Key Research and Development Program of China (Grant No. 2016YFB0201402), National Science Foundation of China (Grant Nos. 61370098, 61672219), Hunan Provincial Natural Science Foundation of China (Grant No. 2015JJ2078), the Hunan Provincial Innovation Foundation For Postgraduate (Grant No. CX2016B316). A lot of thanks should be given to referees and editors,their valuable comments greatly improved the quality of the manuscript. We also thank yufayun data center that provides the workload system log files.