Xu, Yangyang http://orcid.org/0000-0002-4163-3723
Yin, Wotao http://orcid.org/0000-0001-6697-9731
Funding for this research was provided by:
National Science Foundation (DMS-1317602)
Army Research Office (MURI W911NF-09-1-0383)
Article History
Received: 14 March 2016
Revised: 31 October 2016
Accepted: 24 January 2017
First Online: 4 February 2017