首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   3348篇
  免费   169篇
  国内免费   1篇
  3518篇
  2024年   10篇
  2023年   43篇
  2022年   33篇
  2021年   56篇
  2020年   69篇
  2019年   114篇
  2018年   135篇
  2017年   139篇
  2016年   148篇
  2015年   110篇
  2014年   105篇
  2013年   386篇
  2012年   204篇
  2011年   209篇
  2010年   119篇
  2009年   102篇
  2008年   142篇
  2007年   136篇
  2006年   106篇
  2005年   139篇
  2004年   121篇
  2003年   114篇
  2002年   93篇
  2001年   58篇
  2000年   59篇
  1999年   41篇
  1998年   28篇
  1997年   21篇
  1996年   28篇
  1995年   18篇
  1994年   11篇
  1993年   22篇
  1992年   25篇
  1991年   28篇
  1990年   34篇
  1989年   19篇
  1988年   26篇
  1987年   21篇
  1986年   25篇
  1985年   20篇
  1984年   23篇
  1983年   20篇
  1982年   10篇
  1980年   8篇
  1979年   12篇
  1978年   12篇
  1977年   13篇
  1974年   9篇
  1973年   9篇
  1971年   10篇
排序方式: 共有3518条查询结果,搜索用时 0 毫秒
91.
92.
The aim of this study was to identify the cascade of effects leading from alterations in force generation around the ankle joint to increased plantar pressures under the forefoot. Gait analysis including plantar pressure measurement was performed at an individually preferred and a standardized, imposed gait velocity in diabetic subjects with polyneuropathy (n = 94), without polyneuropathy (n = 39) and healthy elderly (n = 19). The plantar flexion moment at 40% of the stance phase was negatively correlated with the displacement rate of center of pressure (r = ?.749, p < .001 at the imposed, and r = ?.693, p < .001 at the preferred gait velocity). Displacement rate of center of pressure was strongly correlated with forefoot loading (r = ?.837, p < .001 at the imposed, and r = ?.731, p < .001 at the preferred gait velocity). People with a relatively high plantar flexion moment at 40% of the stance phase, have a faster forward transfer of center of pressure and consequently higher loading of the forefoot. This indicates that interventions aimed at increasing the control of the roll-off of the foot may contribute to a better plantar pressure distribution.  相似文献   
93.
Socially desirable responding may cause differences between preelection polls and election outcomes. Bias-free preelection polls are, however, important because they influence election outcomes. Benefiting from a unique opportunity, we experimentally controlled social desirability using the Crosswise Model in a poll prior to the German federal election in 2013. We found that due to strategic voting, outcome expectations were related to voting intentions; the election outcome was therefore likely distorted by social desirability bias in preelection polls. We recommend using indirect questioning techniques whenever a vote for at least one of the competing parties may be perceived as socially undesirable.  相似文献   
94.
The invention of victimization surveys is often presented as a synthesis of the two theoretical attitudes that, supposedly, dominated the 1960s debate over official crime statistics: realism and social constructionism. This paper turns this genesis story on its head. Using original archives, I argue that victimization surveys responded to organizational opportunities in the field of applied research. It was only after the fact that two of their architects seized the debate on crime measurement to broadcast their invention. In so doing they strategically recast the terms of this debate into a binary division between two antithetical social ontologies. This case is used to discuss how social scientists come to reinterpret and misunderstand their history.  相似文献   
95.
This study investigated the role of individual resources, notably self-efficacy, gratitude, and hope, in subjective well-being of white dormitory students at a historically white institution of higher learning. Using a convenience sample of white students (N?=?227), we tested the role of generalised self-efficacy, gratitude, and hope as indicators of a latent factor, labelled personal resources, in a structural equation model with subjective well-being as the latent output variable, measured by self-esteem and satisfaction with life. Path analyses indicated a reasonable fit between the data and our hypothesised theoretical model which proposed positive relations between levels of generalised self-efficacy, gratitude, dispositional hope, self-esteem and satisfaction with life. White students were psychologically doing well, considering above-midpoint levels obtained for levels of generalised self-efficacy, gratitude, dispositional hope, and satisfaction with life However, scores obtained for self-esteem and adult dispositional hope were below the mid-point and neutral respectively, indicating that White students do not agree that they experience high levels of these two psychological strengths. White female students experienced higher levels of hope, gratitude, and life satisfaction, while no significant gender differences were found for generalised self-efficacy and self-esteem. The results of this study highlight the potential for using psychological strengths to promote well-being in racially diverse students.  相似文献   
96.
This research investigated the extent and nature of the informational support that enables young children to understand pictures as symbols. Two experiments were conducted using an object-retrieval task. The first experiment varied the amount (complete and no instructions) and kind of information (intended function of the symbol and picture-referent correspondence) provided to 30-month-old children. The results show that information which emphasizes intentionality was critical for symbolic comprehension. Although information about correspondence was not enough in itself, children came to achieve an insight halfway through the task, probably as a consequence of a comparison process. This study suggests that highlighting the heart of the symbolic relation, its intended function, is a privileged route in children's appreciation of a picture-referent relation. The second experiment shows that by 36 months of age, children figured out, with no instructions at all, the intentional nature of the symbol.  相似文献   
97.
Complex relationships exist between eating behaviour and personal and environmental factors. Rural and urban geographic contexts seem to play a role in eating behaviour, and therefore deserve a deeper study. A healthy eating behaviour and the conditions that promote it are a major issue in the promotion of adolescent health. The study aims to investigate the associations between the area of residence (urban vs. rural), self‐regulation strategies (TESQ‐E) and eating behaviours among children and adolescents. A total of 11,820 adolescents (50.6% girls) participated in the study, with a mean age of 13.30 years (SD= 2.13). Nine countries (The Netherlands, United Kingdom, Poland, Portugal, Denmark, Romania, Germany, Finland and Belgium) completed a questionnaire in the school context, asking about the use of self‐regulation strategies, eating behaviour awareness/care and sociodemographic questions such as age, gender and residential area. Both areas of residence (urban vs. rural) are associated with eating awareness/care in Romania and Portugal, controlling for age, gender and self‐regulation strategies. In some European countries at least, and most probably around the world, health promotion should focus on an ecological approach that includes the understanding of the effect of both environmental factors and personal skills on eating behaviour/awareness.  相似文献   
98.
This article presents the history of one until now unknown case of C.G. Jung: Maggy Reichstein. Born in Indonesia in 1894 in a very aristocratic family, she brought her sister to Zurich to be treated by Jung in 1919, and later she herself was in analysis with him. Jung used her case as example in his lecture in 1937 on the realities of practical psychotherapy, relating it to the process of transference and countertransference. Jung deepened his studies in Eastern psychology after a series of dreams she had, which culminated in the Yoga Kundalini Seminars. She was also the case presented in his article of 1951 on the concept of synchronicity. Jung wrote that her case, concerning synchronicity, remained unique in his experience. Jung also published some of her mandalas. He considered her able to understand his ideas in depth. Reichstein was for Jung an important case, which challenged and triggered his interests in different subjects.  相似文献   
99.
It is imperative that the university environment be supportive and capable of nurturing optimal learning and performance in students. Using job design and work stress theories, the study assessed relationships between psychosocial work characteristics, well-being and satisfaction, and performance in a random sample survey of Australian university students (N = 176). Methodological improvements were a time lag between survey and performance measures, an objective measure of performance, and LISREL structural equation modeling. Results showed high levels of psychological distress and low levels of satisfaction, both linked to high demands combined with low control. In accord with the happy-productive student hypothesis, satisfaction mediated the impact of the work environment on performance. Reengineering the design of the student work environment may therefore improve performance outcomes (student grades) through enhancing satisfaction.  相似文献   
100.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号