国家自然科学基金61471321;教育部-中国移动科研基金MCM20150503;国家自然科学基金61202400;浙江省自然科学基金LQ12F02014资助Supported by National Natural Science Foundation of China61471321;Ministry of Education - China Mobile Research FundMCM20150503;National Natural Science Foundation of China61202400;Natural Science Foundation of Zhejiang ProvinceLQ12F02014