全文获取类型
收费全文 | 8265篇 |
免费 | 449篇 |
国内免费 | 127篇 |
出版年
2023年 | 57篇 |
2022年 | 52篇 |
2021年 | 80篇 |
2020年 | 140篇 |
2019年 | 139篇 |
2018年 | 155篇 |
2017年 | 155篇 |
2016年 | 145篇 |
2015年 | 94篇 |
2014年 | 111篇 |
2013年 | 351篇 |
2012年 | 110篇 |
2011年 | 76篇 |
2010年 | 74篇 |
2009年 | 112篇 |
2008年 | 115篇 |
2007年 | 127篇 |
2006年 | 114篇 |
2005年 | 95篇 |
2004年 | 68篇 |
2003年 | 68篇 |
2002年 | 50篇 |
2001年 | 48篇 |
2000年 | 37篇 |
1999年 | 44篇 |
1998年 | 29篇 |
1997年 | 16篇 |
1996年 | 32篇 |
1995年 | 21篇 |
1994年 | 11篇 |
1993年 | 15篇 |
1992年 | 24篇 |
1991年 | 10篇 |
1990年 | 14篇 |
1989年 | 18篇 |
1988年 | 10篇 |
1987年 | 10篇 |
1985年 | 461篇 |
1984年 | 590篇 |
1983年 | 505篇 |
1982年 | 568篇 |
1981年 | 546篇 |
1980年 | 537篇 |
1979年 | 477篇 |
1978年 | 528篇 |
1977年 | 419篇 |
1976年 | 406篇 |
1975年 | 333篇 |
1974年 | 341篇 |
1973年 | 288篇 |
排序方式: 共有8841条查询结果,搜索用时 0 毫秒
251.
Bo Ekehammar 《Journal of Vocational Behavior》1978,12(3):279-289
A causal model for career choice was outlined, encompassing psychological cost-benefit-profit as a central intervening construct. The model was applied to the career choice (education vs work) after high school graduation and tested on longitudinal data from 173 students. The main problem concerned the relationship among the components in the causal career choice model, using multiple correlation and path analysis as tools. The results showed clear sex differences. For boys, the model was a rather powerful predictor of career choice (R = 0.70), and Psychological profit with regard to continued education had a clear direct effect as well as an indirect effect on career choice. For girls, the predictive validity was low (R = 0.35) and Psychological profit affected career choice only indirectly via Educational aspiration. 相似文献
252.
This paper reports the results of a panel study of young, white, rural women from Georgia, South Carolina, and Texas (N = 138). The study was primarily concerned with how social origin variables affected early educational and occupational orientations and how early states of these orientations affected the orientations themselves at a later point in time. The results indicated that mother's education had a greater effect than father's education, but in either case the effect is mediated by intervening influences such as early aspirations and expectations. These young women held very traditional status orientations (with 60% projecting the occupations of beautician, nurse, stenographer, or school teacher), and their orientations were quite stable between their sophomore and senior years in high school. Since there has been so little work reported on the status attainment process for women, and rural women in particular, this study does offer a limited insight into this phenomenon. 相似文献
253.
254.
255.
256.
257.
258.
259.
A linear integral equation for a system of mutually impeding points is developed and solved explicitly. Particular solutions are shown to be subharmonic functions for a large class of stimuli. Specialized forms of the general equation presented in this paper occur within a number of mathematical models of Mach bands. In addition to these known spatial properties, our results also show that the time course of this basic equation may be useful in developing models of transient neural activity as well as of temporal psychophysical phenomena, such as the Broca-Sulzer effect. Further, a spatial transfer function much like the low-frequency cutoff of empirically derived modulation transfer functions follows directly from our basic integral equation if the additional assumption of spatial homogeneity is imposed. 相似文献
260.