分面浏览：发表日期 |
| 当前检索式 | ((ALL：velocity)) |
| 限定条件 | ((专题：北京大学)) |
| 2017 90 | 2016 142 | 2015 116 |
| 2014 111 | 2013 103 | 2012 110 |
| 2011 82 | 2010 75 | 2009 69 |
| 2008 50 | 2007 42 | 2006 58 |
| 2005 51 | 2004 47 | 2003 39 |
| 2002 33 | 2001 37 | 2000 22 |
| 1999 26 | 1998 10 | 1997 16 |
| 1996 9 | 1995 14 | 1994 8 |
| 1993 8 | 1992 8 | 1991 4 |
| 1990 4 | 1989 2 | 1987 1 |
| 1985 3 | 1984 2 | 1983 1 |
| 1981 1 |
