1. Department of Pharmaceutical Analysis, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China,
2. Department of Measurement and Control, School of Physics, Liaoning University, Shenyang, China,
3. Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, Shenyang, China, and
4. Department of Mathematics, Liangjiazi Middle School, Shenyang, China