Visiting scholar(1996-1997), Rome University(Tor Vergata), Italy. Advanced visiting scholar(2002), Trento University, Italy.
意大利罗马第二大学访问学者（1996-1997）；
Visiting scholar(1996-1997), Rome University(Tor Vergata), Italy. Advanced visiting scholar(2002), Trento University, Italy.
意大利罗马第二大学访问学者（1996-1997）；
应用推荐