全文获取类型
收费全文 | 2282篇 |
免费 | 252篇 |
国内免费 | 399篇 |
出版年
2024年 | 4篇 |
2023年 | 38篇 |
2022年 | 48篇 |
2021年 | 90篇 |
2020年 | 110篇 |
2019年 | 82篇 |
2018年 | 97篇 |
2017年 | 95篇 |
2016年 | 101篇 |
2015年 | 69篇 |
2014年 | 78篇 |
2013年 | 180篇 |
2012年 | 123篇 |
2011年 | 173篇 |
2010年 | 139篇 |
2009年 | 167篇 |
2008年 | 186篇 |
2007年 | 211篇 |
2006年 | 209篇 |
2005年 | 172篇 |
2004年 | 92篇 |
2003年 | 74篇 |
2002年 | 49篇 |
2001年 | 29篇 |
2000年 | 33篇 |
1999年 | 31篇 |
1998年 | 31篇 |
1997年 | 22篇 |
1996年 | 27篇 |
1995年 | 15篇 |
1994年 | 8篇 |
1993年 | 14篇 |
1992年 | 12篇 |
1991年 | 7篇 |
1990年 | 8篇 |
1989年 | 5篇 |
1988年 | 5篇 |
1987年 | 7篇 |
1986年 | 4篇 |
1985年 | 8篇 |
1984年 | 12篇 |
1983年 | 8篇 |
1982年 | 11篇 |
1981年 | 8篇 |
1980年 | 7篇 |
1979年 | 5篇 |
1975年 | 4篇 |
1973年 | 5篇 |
1968年 | 4篇 |
1966年 | 3篇 |
排序方式: 共有2933条查询结果,搜索用时 93 毫秒
281.
282.
Wing Tung Au Xiao-Ping Chen S.S Komorita 《Organizational behavior and human decision processes》1998,75(3):274-293
A public good (PG) is a commodity or service made available to all members of a group: its provision depends on the voluntary contribution of its members. Once provided, all members can enjoy the benefits of the PG, regardless of whether they contributed or not; hence, there is a temptation to “free-ride” in the hope that others will contribute. Rapoport (1987) showed that an important factor that affects cooperation (contribution) in a PG dilemma is the extent to which a group member is critical in providing it. Erev and Rapoport (1990) tested a game-theoretic model that yields deterministic predictions about the effects of criticality on cooperation in public good dilemmas. Based on research by Chen, Au, and Komorita (1996), we propose a probabilistic model of criticality. The model is tested and found to fit empirical data. Extensions of the model to situations with uncertain group size or provision point are discussed. 相似文献
283.
This paper introduces a method for finding the non‐dominated set in criterion space of an MOLP problem based on Fourier–Motzkin Elimination. The method incorporates a procedure that eliminates decision variables from constraints and transforms a feasible region from decision space to criterion space. While avoiding characterization of the efficient set in decision space, it finds the non‐dominated set in criterion space. After the decision maker's most preferred criterion vector has been identified, the corresponding efficient solutions can be found by backward substitution. The method was implemented in MATLAB using a tabular form and computational experiments were conducted. The results indicate that although the method performs well for relatively small problems, it can be computationally intensive for larger problems. Nonetheless, the method is intuitively appealing and it provides useful insights into the geometry and theory of MOLP. As such it makes it a valuable educational tool for students of multi‐criteria decision analysis. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
284.
285.
James H. Liu Marc Stewart Wilson John McClure Te Ripowai Higgins 《European journal of social psychology》1999,29(8):1021-1047
The context of intergroup relations in Aotearoa/New Zealand was investigated using perceptions of history by Maori (Polynesian‐descended) and Pakeha (European‐descended) samples from university and the general public. There was strong consensus that the Treaty of Waitangi was the most important event in New Zealand's history, but only Maori, the subordinate ethnic group, showed in‐group favouritism in their judgments regarding the Treaty. Pakeha, the dominant group, showed outgroup favouritism, and distanced themselves from past injustices using linguistic strategies. Maori students showed interest in their ethnic origins (ontogeny), rating the distant past and Polynesian history higher, and free‐recalling more events prior to European arrival than other groups; Maori in the general population shared a more similar perception of history to Pakeha. Both in‐group favouritism and ontogeny were found in sentence‐completion choices. Historical perceptions were strongly related to positions on current political issues. Results are related to social identity theory, social representations theory, and social dominance theory. Copyright © 1999 John Wiley & Sons, Ltd. 相似文献
286.
Yanlou Liu Tao Xin Björn Andersson Wei Tian 《The British journal of mathematical and statistical psychology》2019,72(1):18-37
Two new methods to estimate the asymptotic covariance matrix for marginal maximum likelihood estimation of cognitive diagnosis models (CDMs), the inverse of the observed information matrix and the sandwich-type estimator, are introduced. Unlike several previous covariance matrix estimators, the new methods take into account both the item and structural parameters. The relationships between the observed information matrix, the empirical cross-product information matrix, the sandwich-type covariance matrix and the two approaches proposed by de la Torre (2009, J. Educ. Behav. Stat., 34, 115) are discussed. Simulation results show that, for a correctly specified CDM and Q-matrix or with a slightly misspecified probability model, the observed information matrix and the sandwich-type covariance matrix exhibit good performance with respect to providing consistent standard errors of item parameter estimates. However, with substantial model misspecification only the sandwich-type covariance matrix exhibits robust performance. 相似文献
287.
Previous research on the relationship between collectivism and corruption has not investigated their co‐variation over time. In this study, we use Google Ngram Viewer to track the frequency of words related to collectivism and corruption in American books (1800–2000) and in Chinese Books (1970–2008). The results demonstrate that a positive association between the usage of these terms during the periods in both Chinese and American books, with changes in words related to collectivism preceding changes in words related to corruption in American books. The theoretical and practical implications are also discussed. 相似文献
288.
Intrigued by relationship between team motivational context and individual characteristics in the organizational reality, we developed and tested a cross‐level model to investigate the interactive effects of team empowerment and individual goal orientations on individual creative performance through the mediating mechanism of an individual's creative self‐efficacy. Using multi‐wave multi‐source data from 63 R&D teams in three IT companies, we found that (1) team empowerment, individual learning goal orientation, and individual performance orientation are all positively related to individual creative performance through mediation of creative self‐efficacy; (2) learning orientation and performance approach orientation could both supplement the effects of team empowerment on individual creative self‐efficacy. Our findings point to the importance of individual goal orientation in shaping the effects of team motivation climates and provide insights for both scholars and practitioners. The specific practical implications include but are not limited to (1) individuals with learning and performance approach orientations should be identified during hiring procedures given that they could still thrive in less empowered teams and maintain a relatively high level of creative self‐efficacy and creative outcomes; (2) managers should consider assigning employees who are more learning oriented to more empowering and open‐ended tasks in order to obtain better creative results. 相似文献
289.
This study aimed to explore the relationships among early adolescents’ perceived parental psychological control/autonomy support, self‐trouble, and internalizing problems as well as the potential gender differences in these relationships. Multiple‐group path analysis was performed on the data collected from 1,089 adolescents in Beijing junior high schools. Results revealed that parental psychological control (autonomy support) was associated with adolescents’ more (fewer) internalizing problems, and self‐trouble acted as a mediator in these two relationships. Moreover, only the indirect relationship between parental autonomy support and internalizing problems via self‐trouble was moderated by gender, with girls showing a little stronger indirect effect than boys, and specifically, it was the relationship between autonomy support and self‐trouble that existed gender differences, with girls showing higher coefficient than boys. The relationship between parental psychological control/autonomy support and early adolescents’ internalizing problems was discussed with regard to self‐trouble and gender differences. 相似文献
290.
Synthese - The paper discusses the recent literature on abstraction/idealization in connection with the “paradox of infinite idealization.” We use the case of taking thermodynamics... 相似文献