本文由国家自然科学基金项目41001126、福建省自然科学基金项目2015J01154和福建省高校杰出青年科研人才计划基金项目JA13093资助;This work was supported by the National Natural Science Foundation of China 41001126,the Natural Science Foundation of Fujian Province 2015J01154 and the Foundation of Outstanding Young Researchers Plan in the Universities of Fujian Province JA13093.