全文获取类型
收费全文 | 8633篇 |
免费 | 98篇 |
国内免费 | 8篇 |
专业分类
教育 | 5898篇 |
科学研究 | 1125篇 |
各国文化 | 50篇 |
体育 | 612篇 |
综合类 | 3篇 |
文化理论 | 53篇 |
信息传播 | 998篇 |
出版年
2022年 | 55篇 |
2021年 | 104篇 |
2020年 | 134篇 |
2019年 | 185篇 |
2018年 | 296篇 |
2017年 | 272篇 |
2016年 | 269篇 |
2015年 | 161篇 |
2014年 | 275篇 |
2013年 | 1409篇 |
2012年 | 206篇 |
2011年 | 240篇 |
2010年 | 203篇 |
2009年 | 185篇 |
2008年 | 226篇 |
2007年 | 191篇 |
2006年 | 174篇 |
2005年 | 153篇 |
2004年 | 177篇 |
2003年 | 131篇 |
2002年 | 132篇 |
2001年 | 196篇 |
2000年 | 200篇 |
1999年 | 182篇 |
1998年 | 95篇 |
1997年 | 128篇 |
1996年 | 107篇 |
1995年 | 77篇 |
1994年 | 97篇 |
1993年 | 70篇 |
1992年 | 165篇 |
1991年 | 125篇 |
1990年 | 117篇 |
1989年 | 145篇 |
1988年 | 128篇 |
1987年 | 103篇 |
1986年 | 109篇 |
1985年 | 108篇 |
1984年 | 80篇 |
1983年 | 93篇 |
1982年 | 62篇 |
1981年 | 73篇 |
1980年 | 64篇 |
1979年 | 104篇 |
1978年 | 66篇 |
1977年 | 65篇 |
1976年 | 55篇 |
1975年 | 50篇 |
1974年 | 60篇 |
1973年 | 56篇 |
排序方式: 共有8739条查询结果,搜索用时 15 毫秒
81.
Through a qualitative interview design, this study investigated how participation in a rigorous academic environment may influence gifted students who demonstrate high levels of perfectionism. The study also examined how their responses to a rigorous academic and residential environment may differ according to the type of perfectionism. Findings indicated that some socially prescribed perfectionists reported an increase in perfectionism, whereas some self-oriented perfectionists reported an increase followed by a decrease in their perfectionism. Overall, the majority of the participants, regardless of their type of perfectionism, indicated a decrease in their perfectionism as a result of their new academic environment. Reactions to experiencing imperfections ranged from calm to guilt or even anger, depending on the type of perfectionism. Implications for working with gifted students who show high levels of perfectionism are discussed. 相似文献
82.
83.
84.
85.
86.
In light of recent theories of meaningful media that suggest a host of psychological benefits, the present study uniquely extends the boundaries of the effects of reality TV from simply offering pleasure, diversion, and amusement to its viewers to also providing deep insight and meaning. In particular, a between-subjects experiment (N = 143) examined differences in affective, cognitive, and motivational responses to lifestyle transforming versus game based reality programs. Findings indicate that lifestyle transforming reality TV produced stronger feelings of elevation and perceptions of the program as moving and thought-provoking than game reality TV, which in turn increased motivations for altruism. Avenues for future research and theoretical implications of meaningful and inspiring reality TV for positive psychology are discussed. 相似文献
87.
V. K. Wadhawan 《Resonance》2005,10(11):27-41
A structure is an assembly that serves an engineering function. It is reasonable to expect that all engineering design should
be smart, and not dumb. But one can still make a distinction between smartly designed structures and smart structures. The
latter term has acquired a specific technical meaning over the last few decades. A smart structure is that which has the ability
to respond adaptively in a pre-designed useful and efficient manner to changes in environmental conditions, including any
changes in its own condition; the response is adaptive in the sense that two or more stimuli or inputs may be received as
anticipated and yet there is a single response function as per design. Smartness ensures that the structure gives optimum
performance under a variety of environmental conditions. While structures with some degree of smartness have been designed
from times immemorial, the current activity and excitement in this field derives its impetus from the level of sophistication
achieved in materials science, information technology, measurement science, sensors, actuators, signal processing, nanotechnology,
cybernetics, artificial intelligence, and biomimetics. 相似文献
88.
K. R. Shivanna 《Resonance》2016,21(11):1007-1018
After the pollen grain reaches the stigma through outsourced agents (pollinators), the next step before fertilization is to select the right type of pollen. Similar to a marriage in human beings, fiowering plants also have evolved elaborate screening process to select the right pollen grains and to reject the wrong ones. Even after initial screening for the right pollen, the pistil imposes a tough competition amongst them, comparable to a swayamvara of Indian mythology, to select the best available pollen. Flowering plants have evolved into a matriarchal society. The selection of the male partner is totally the prerogative of the mother (pistil); the boy (pollen grain) and the girl (ovule) has no say in this selection. 相似文献
89.
Erin K. Howie Joanne A. McVeigh Rebecca A. Abbott Tim S. Olds Leon M. Straker 《Journal of sports sciences》2016,34(16):1581-1587
Fitness is an important component of health, and obese adolescents regularly have poor fitness. Unfortunately, few have assessed the impact of community-based lifestyle interventions on multiple components of fitness. The purpose of this study was to assess the impact of participation in a community-based intervention involving adolescents and parents on multiple components of fitness of obese adolescents. In a within-subject, waitlist controlled clinical trial with 12 months follow-up in Western Australia, participants (n = 56) completed multiple fitness measures at baseline, immediately prior to beginning an 8-week intervention and at 3, 6 and 12 months during a maintenance period. Performance on the shuttle walk was improved immediately post-intervention (increase of 42.8 m, 95% CI: 7.5, 78.2) and at 12 months post-intervention (increase of 44.6 m, 95% CI: 1.3, 87.8) compared with pre-intervention. Muscle performance of quadriceps and deltoids were improved post-intervention (increase of 1.1 (95% CI: 0.1, 2.1) kg · F and 1.0 (0.02, 2.1) kg · F, respectively) and all muscle performance measures were improved at 12 months following the intervention. There were no changes in waist circumference. A community-based lifestyle programme such as Curtin University’s Activity, Food and Attitudes Program (CAFAP) may be a viable strategy for improving fitness in overweight adolescents. 相似文献
90.
C. Albrecht A. Hanssen-Doose K. Bös L. Schlenker S. Schmidt M. Wagner N. Will A. Worth 《Sportwissenschaft》2016,46(4):294-304
Motor performance is an important health resource. Review articles revealed a decline of motor performance of approximately 10?% between 1975 and 2006. In the past most of the data available for such comparisons came from ad hoc studies with non-standardized methods. Within the framework of the ”Motorik-Modul“ (MoMo) study as part of the German Health Interview and Examination Survey for Children and Adolescents (KiGGS), it is possible for the first time to directly compare two cohorts in the ages of 4–17 years in a nationally representative database for Germany. The aim of this article is to report changes in motor performance of children and adolescents in the time period 2003–2006 (cohort baseline n = 4528) compared to 2009–2012 (cohort wave 1, n = 2820). Overall, it is clearly shown that the motor performance of children and adolescents in Germany did not decrease within the observational period of 6 years. The comparison of mean values of the baseline cohort compared to those of wave 1 showed that 28 out of 52 mean values of the two cohorts with a high probability did not differ based on 95?% confidence intervals (CI). In 24 out of the 52 mean values positive changes could be noted based on the individual 95?% CI values. There were more positive changes in primary school aged children than in other age groups. Within these positive changes, most effect sizes were small to medium. The results indicate that recent activities aiming at elevating motor performance levels may have started to make an impact and should be expanded, also in secondary schools. The comparative cohort study presented in this article is currently being checked by the ongoing MoMo wave 2 survey of 2014–2017. 相似文献