全文获取类型
收费全文 | 20461篇 |
免费 | 7篇 |
出版年
2023年 | 3篇 |
2022年 | 3篇 |
2021年 | 4篇 |
2020年 | 4篇 |
2019年 | 5篇 |
2018年 | 3486篇 |
2017年 | 2815篇 |
2016年 | 2243篇 |
2015年 | 194篇 |
2014年 | 75篇 |
2013年 | 76篇 |
2012年 | 563篇 |
2011年 | 2380篇 |
2010年 | 2518篇 |
2009年 | 1473篇 |
2008年 | 1699篇 |
2007年 | 2171篇 |
2006年 | 27篇 |
2005年 | 212篇 |
2004年 | 165篇 |
2003年 | 113篇 |
2002年 | 61篇 |
2001年 | 31篇 |
2000年 | 51篇 |
1999年 | 14篇 |
1998年 | 22篇 |
1997年 | 19篇 |
1996年 | 8篇 |
1995年 | 2篇 |
1994年 | 4篇 |
1993年 | 3篇 |
1992年 | 1篇 |
1991年 | 2篇 |
1990年 | 10篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1983年 | 2篇 |
1980年 | 2篇 |
1976年 | 1篇 |
1975年 | 1篇 |
1969年 | 1篇 |
1968年 | 1篇 |
1967年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
Massimo Mugnai 《Topoi》1990,9(1):61-81
I am grateful to the Alexander von Humboldt-Stiftung for support during the years 1983–84 in which I worked by the Leibniz-Forschungsstelle at Münster collecting the materials for the present essay. 相似文献
22.
Massimo Libardi 《Axiomathes》1997,8(1-3):307-366
Questi temi sono stati discussi con Liliana Albertazzi, Luigi Dappiano, Roberto Poli, cui va il mio ringraziamento per le
osservazioni e i suggerimenti. 相似文献
23.
Theoretical Medicine and Bioethics - 相似文献
24.
25.
Jörg R. J. Schirra 《Kognitionswissenschaft》1997,6(4):177-195
How can we explain that an assertion on something perceived can be understood in the same manner by somebody who cannot perceive that scene? This problem bases the interest in computational linguistics in how listener modeling could possibly be harmonized with reference semantics. Mental images substituting real perception appear as a way out. The architecture of the listener model has to be adapted to the creation and use of such pictorial data structures. Furthermore, the relation between the latter and a verbal (i. e., propositional) representation must be understood. The resulting architecture of a listener model with reference semantics can be employed to solve communicational problems from three general classes in a better way, as is demonstrated by an example implementation. 相似文献
26.
Suicidal behavior in Italy: data, trends and guidelines for a suicide intervention/prevention policy. 总被引:1,自引:0,他引:1
P Crepet S Caracciolo R Casoli D Fabbri F Florenzano G M Grassi A Jonus A Tomelli 《Suicide & life-threatening behavior》1991,21(3):263-278
Even though in Italy, as in the majority of Mediterranean countries, the increase in suicide rates is not among the highest in Europe, between 1969 and 1989 it showed a sharp upswing (+43% among males and +31% among females). In terms of geographical differences, the regions with the highest suicide rate are the northern ones (up to twice the national average). The age groups with the highest suicide risk are those over 74 years (in 1989 the rate among males over 65 was the highest of all: 31.3 per 100,000). The differences in the between-sexes distribution show that among females over 65 years old the suicide rate rose by 70% between 1974 and 1989, versus 77% for males of the same age. The preliminary epidemiological results of one of two Italian centers are presented. These centers are collaborating with the WHO/EURO Multicenter Study on Parasuicide; parasuicide rates are higher for females than for males (55.9 per 100,000, as against 38.1 for males), while the age group at highest risk is seen to be young women (15-24 years), with a specific rate of 115.6. 相似文献
27.
28.
29.
30.