全文获取类型
收费全文 | 52007篇 |
免费 | 2080篇 |
国内免费 | 30篇 |
出版年
2020年 | 581篇 |
2019年 | 733篇 |
2018年 | 1055篇 |
2017年 | 1054篇 |
2016年 | 1108篇 |
2015年 | 739篇 |
2014年 | 908篇 |
2013年 | 4510篇 |
2012年 | 1647篇 |
2011年 | 1796篇 |
2010年 | 1043篇 |
2009年 | 1061篇 |
2008年 | 1627篇 |
2007年 | 1605篇 |
2006年 | 1411篇 |
2005年 | 1282篇 |
2004年 | 1258篇 |
2003年 | 1139篇 |
2002年 | 1181篇 |
2001年 | 1749篇 |
2000年 | 1648篇 |
1999年 | 1262篇 |
1998年 | 663篇 |
1997年 | 569篇 |
1996年 | 512篇 |
1995年 | 519篇 |
1994年 | 494篇 |
1993年 | 516篇 |
1992年 | 1008篇 |
1991年 | 953篇 |
1990年 | 940篇 |
1989年 | 849篇 |
1988年 | 812篇 |
1987年 | 801篇 |
1986年 | 804篇 |
1985年 | 853篇 |
1984年 | 667篇 |
1983年 | 576篇 |
1982年 | 469篇 |
1979年 | 653篇 |
1978年 | 485篇 |
1976年 | 446篇 |
1975年 | 589篇 |
1974年 | 619篇 |
1973年 | 594篇 |
1972年 | 539篇 |
1971年 | 473篇 |
1968年 | 539篇 |
1967年 | 540篇 |
1966年 | 475篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
221.
A plate-pushing task was used to measure endogenous pain in the wrist from different loci. Practical application in rehabilitation seems reasonable. 相似文献
222.
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
223.
224.
EDWIN A. FLEISHMAN 《Personnel Psychology》1988,41(4):679-701
Current research developments in several areas of personnel selection methodology are reviewed. The areas reviewed represent attempts to develop alternatives to traditional paper-and-pencil methods of test development. These areas include computer-interactive tests in the employment situation, new ways of using life-history information, the use of physical tests in selecting individuals for physically demanding jobs, and the development of job-related medical standards for job assignment. 相似文献
225.
A E Puente 《Perceptual and motor skills》1988,66(2):639-642
MMPI profiles of 22 chronic arthritic patients were compared to 22 control pain (nonorganic) patients. While elevations were noted in the HS, D, and Hy scales for the rheumatoid patients, the over-all profiles differed from controls on the PA scale. 相似文献
226.
Under simple- and choice-RT conditions, the biceps brachii muscle was examined in 8 healthy male subjects to determine how the temporal and spatial characteristics of elbow flexion and forearm supination differed at the initial phase of EMG activity and whether preparation or the presence of response uncertainty influenced the EMG outputs of the two movements. In the simple-RT condition, RT of supination was significantly faster than that of flexion but EMG activity of supination was less than that of flexion. In contrast, in the choice-RT condition, RT of flexion was significantly faster than that of supination but EMG activity of flexion was significantly reduced compared to supination. These findings indicate that advanced preparation or motor set facilitates the differentiation of RTs and EMG activities of the response movements and that response uncertainty causes a significant change in the temporal and spatial specificity of both elbow flexion and forearm supination. 相似文献
227.
Test theory without an answer key 总被引:2,自引:0,他引:2
A general model is presented for homogeneous, dichotomous items when the answer key is not known a priori. The model is structurally related to the two-class latent structure model with the roles of respondents and items interchanged. For very small sets of respondents, iterative maximum likelihood estimates of the parameters can be obtained by existing methods. For other situations, new estimation methods are developed and assessed with Monte Carlo data. The answer key can be accurately reconstructed with relatively small sets of respondents. The model is useful when a researcher wants to study objectively the knowledge possessed by members of a culturally coherent group that the researcher is not a member of.This research was supported by NSF Grant No. SES-8320173 to the authors. We gratefully acknowledge comments and suggestions from John Boyd, Tarow Indow, and Kathy Maher as well as the editor and several anonymous referees. 相似文献
228.
This paper gives a method for determining a sample size that will achieve a prespecified bound on confidence interval width for the interrater agreement measure,. The same results can be used when a prespecified power is desired for testing hypotheses about the value of kappa. An example from the literature is used to illustrate the methods proposed here. 相似文献
229.
230.
Renato A. Lewin 《Studia Logica》1988,47(4):387-389
We prove that there are two involutions defined by monadic terms that characterize Monadic Algebras. We further prove that the variety of Monadic Algebras is the smallest variety of Interior Algebras where these involutions give rise to an interpretation from the variety of Bounded Distributive Lattices into it.Research funded by Fondecyt, project N 764-1987. 相似文献