分面浏览：发表日期 |
| 当前检索式 | ((ALL：Learning systems)) |
| 限定条件 | 无 |
| 2024 22 | 2023 151 | 2022 249 |
| 2021 317 | 2020 237 | 2019 521 |
| 2018 681 | 2017 492 | 2016 429 |
| 2015 389 | 2014 322 | 2013 240 |
| 2012 251 | 2011 225 | 2010 299 |
| 2009 148 | 2008 120 | 2007 73 |
| 2006 113 | 2005 75 | 2004 43 |
| 2003 35 | 2002 23 | 2001 12 |
| 2000 10 | 1999 12 | 1998 3 |
| 1997 2 | 1996 1 | 1995 4 |
| 1994 1 | 1993 1 | 1991 3 |
| 1987 1 |
