Acknowledgment. Research was partially sponsored by NSF, DARPA, NIH and NSFC. Q.K. thanks Xiamen University for the financial support during his stay at Georgia Institute of Technology.
Acknowledgment. Research was partially sponsored by NSF, DARPA, NIH and NSFC. Q.K. thanks Xiamen University for the financial support during his stay at Georgia Institute of Technology.
鸣谢:研究的一部分资金是由美国国家科学基金会,美国国防先期研究计划局,国家卫生机构和国家自然科学基金委员会等资助; 感谢厦门大学在佐治亚技术学院期间对研究项目的财政支援。