1. College of Science
2. Nanjing Forestry University
3. Nanjing 210037
4. P. R. China
5. Tsinghua Univ
6. Dept Elect Engn
7. State Key Lab Power Syst
8. Beijing 100084
9. Institute of Polymer Materials
10. China Building Material Federation
11. Beijing 100037
12. Institute of Chemical Industry of Forestry Products
13. CAF
14. Nanjing