全文获取类型
收费全文 | 26331篇 |
免费 | 357篇 |
国内免费 | 5篇 |
专业分类
26693篇 |
出版年
2024年 | 12篇 |
2023年 | 79篇 |
2022年 | 96篇 |
2021年 | 130篇 |
2020年 | 166篇 |
2019年 | 173篇 |
2018年 | 3683篇 |
2017年 | 3027篇 |
2016年 | 2457篇 |
2015年 | 367篇 |
2014年 | 284篇 |
2013年 | 976篇 |
2012年 | 1019篇 |
2011年 | 2792篇 |
2010年 | 2749篇 |
2009年 | 1638篇 |
2008年 | 2029篇 |
2007年 | 2445篇 |
2006年 | 325篇 |
2005年 | 446篇 |
2004年 | 320篇 |
2003年 | 268篇 |
2002年 | 206篇 |
2001年 | 94篇 |
2000年 | 145篇 |
1999年 | 71篇 |
1998年 | 60篇 |
1997年 | 41篇 |
1996年 | 47篇 |
1995年 | 26篇 |
1994年 | 21篇 |
1993年 | 21篇 |
1992年 | 36篇 |
1991年 | 34篇 |
1990年 | 34篇 |
1989年 | 31篇 |
1988年 | 31篇 |
1987年 | 22篇 |
1986年 | 15篇 |
1985年 | 15篇 |
1984年 | 22篇 |
1983年 | 17篇 |
1979年 | 20篇 |
1978年 | 14篇 |
1976年 | 18篇 |
1974年 | 15篇 |
1973年 | 11篇 |
1972年 | 11篇 |
1970年 | 11篇 |
1968年 | 13篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
12.
13.
14.
15.
16.
José A. Benardete 《Philosophical Studies》1993,72(2-3):265-282
17.
The processing of restrictive relative clauses in Hungarian 总被引:2,自引:0,他引:2
18.
We studied the correlation of one measure of imagery ability, the Visual Elaboration Scale, with two others, absorption of image and effort required to form a mental image. Significant correlations were obtained between the Visual Elaboration Scale and the other scales, with the exception of Absorption for women. 相似文献
19.
Jos M. F. ten Berge 《Psychometrika》1988,53(4):487-494
Van de Geer has reviewed various criteria for transforming two or more matrices to maximal agreement, subject to orthogonality constraints. The criteria have applications in the context of matching factor or configuration matrices and in the context of canonical correlation analysis for two or more matrices. The present paper summarizes and gives a unified treatment of fully general computational solutions for two of these criteria, Maxbet and Maxdiff. These solutions will be shown to encompass various well-known methods as special cases. It will be argued that the Maxdiff solution should be preferred to the Maxbet solution whenever the two criteria coincide. Horst's Maxcor method will be shown to lack the property of monotone convergence. Finally, simultaneous and successive versions of the Maxbet and Maxdiff solutions will be treated as special cases of a fully flexible approach where the columns of the rotation matrices are obtained in successive blocks.The author is obliged to Henk Kiers for computational assistance and helpful comments. 相似文献
20.
J L Gariépy K E Hood R B Cairns 《Journal of comparative psychology (Washington, D.C. : 1983)》1988,102(4):392-399
This research was designed to investigate development and behavioral mediation in lines of ICR mice that have been selectively bred for aggressive behavior. General behavioral reactivity and behavioral immobility have been implicated as potential mediators by prior analyses of preattack interactions. To evaluate the separate roles of these dispositions, the emergence of attacks in genetically selected lines was tracked for 11 years by three levels of analysis: over successive generations, over development, and over dyadic interactions. Convergent outcomes were observed in all three levels with respect to two findings: (a) Robust line differences were obtained in attack behaviors, and (b) strong associations were found between line differences in attacks and line differences in behavioral immobility. Conversely, all three levels of analysis indicated a weak and inconsistent association between line differences in attacks and measures of social and nonsocial reactivity. 相似文献