摘要
Tsinghua Science and Technology （Tsinghua Sci Technol）, a comprehensive academic journal sponsored ＇by Tsinghua University, is published bimonthly. This journal aims at presenting the up-to-date scientific achievements with high creativity and great significance in various engineering fields and in mathematical sciences, life sciences, chemistry, physics, etc. Contributions within the above scope all over the world are welcome. Tsinghua Sci Technol is indexed by Engineering index （El, USA）, Chemical Abstracts （CA, USA）,
Tsinghua Science and Technology （Tsinghua Sci Technol）, a comprehensive academic journal sponsored ＇by Tsinghua University, is published bimonthly. This journal aims at presenting the up-to-date scientific achievements with high creativity and great significance in various engineering fields and in mathematical sciences, life sciences, chemistry, physics, etc. Contributions within the above scope all over the world are welcome. Tsinghua Sci Technol is indexed by Engineering index （El, USA）, Chemical Abstracts （CA, USA）,
