1. State Key Laboratory of Precision Measuring Technology & Instruments
2. College of Precision Instrument and Opto-electronics Engineering
3. Tianjin University
4. Tianjin 300072, China
5. Department of Materials Science and Engineering
6. University of Maryland
7. College Park, USA
8. Computer
9. Electrical and Mathematical Sciences and Engineering (CEMSE) Division
10. Department of Electrical and Computer Engineering
11. King Abdullah University of Science and Technology (KAUST)
12. Thuwal 23955-6900, Kingdom of Saudi Arabia