National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [11071057, 11271052, 11101331, 11331005, 11071093]; Tian Yuan Special Foundation [11226029]; FANEDDFoundation for the Author of National Excellent Doctoral Dissertation of China [201315]; Science and Technology Program of Shaanxi Province [2013KJXX-23]; Program for Changjiang Scholars and Innovative Research Team in UniversityProgram for Changjiang Scholars & Innovative Research Team in University (PCSIRT) [IRT13066]; Ministry of Education of ChinaMinistry of Education, China [20100144110001]; Special Fund for Basic Scientific Research of Central Colleges [CCNU12C01001]