1. State Key Laboratory of Precision Measurement Technology and Instruments
2. Department of Precision Instruments
3. Tsinghua University
4. Beijing 100084
5. China
6. College of Precision Instrument and Optoelectronics Engineering
7. Tianjin University
8. Tianjin 30072
9. State Key Laboratory of Precision Measuring Technology and Instruments
10. College of Control Science and Engineering
11. China University of Petroleum (East China)
12. Qingdao 266580