中国科学技术信息研究所--国家工程技术数字图书馆

university of maryland college park.(89)

university of california san diego.(71)

university of toronto (canada).(70)

university of washington.(70)

university of california los angeles.(68)

rochester institute of technology.(63)

university of california berkeley.(63)

university of illinois at urbana-champaign.(59)

carnegie mellon university.(57)

arizona state university.(51)

university of minnesota.(48)

university of michigan.(41)

georgia institute of technology.(37)

iowa state university.(36)

cornell university.(35)

the chinese university of hong kong (hong kong).(35)

boston university.(34)

harvard university.(34)

university of southern california.(32)

rensselaer polytechnic institute.(31)

the university of wisconsin - madison.(31)

purdue university.(30)

new york university.(29)

northeastern university.(29)

the university of north carolina at chapel hill.(29)

stanford university.(27)

princeton university.(26)

state university of new york at buffalo.(26)

columbia university.(25)

rutgers the state university of new jersey - new brunswick.(25)