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871.
The perceptions of Looked After Children (LAC; n = 51), their Designated Teachers (DTs), and a sample of non‐LAC (n = 99) were elicited. LAC held more positive self‐perceptions than the non‐LAC, and similarly positive ratings were given for the LAC by their DTs; but LAC held lower career aspirations than the non‐LAC. LAC differed in their levels of resilience, in terms of the number of risk and protective factors identified for each child. Girls had more protective and fewer risk factors than boys. Moreover, a high incidence of protective factors in LAC was associated with positive self‐perceptions, and a high incidence of risk factors was associated with negative self‐perceptions. The implications of these findings for educational psychology practice are discussed.  相似文献   
872.
    
Field experiments can provide compelling demonstrations of social learning in wild populations. Social learning has been experimentally demonstrated in at least 23 field experiments, in 20 species, covering a range of contexts, such as foraging preferences and techniques, habitat choice, and predator avoidance. We review experimental approaches taken in the field and with wild animals brought into captivity and note how these approaches can be extended. Relocating individuals, introducing trained individual demonstrators or novel behaviors into a population, or providing demonstrator-manipulated artifacts can establish whether and how a particular act can be socially transmitted in the wild and can help elucidate the benefits of social learning. The type, strength, and consistency of presented social information can be varied, and the provision of conditions favoring the performance of an act can both establish individual discovery rates and help determine whether social information is needed for acquisition. By blocking particular avenues of social transmission or removing key individuals, routes of transmission in wild populations can be investigated. Manipulation of conditions proposed to favor social learning can test mathematical models of the evolution of social learning. We illustrate how field experiments are a viable, vital, and informative approach to the study of social learning.  相似文献   
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The world’s three million cross-border international students are located in a ‘gray zone’ of regulation with incomplete human rights, security and capabilities. Like other mobile persons such as short-term business and labour entrants, and refugees, students located on foreign soil do not enjoy the same protections and entitlements as do citizens. International students are affected by two different national regulatory regimes, in the nations of citizenship and of education. But they are fully covered by neither. Their position is vulnerable and uncertain, mediated by non-citizen status and the related facts of cultural difference, information asymmetry and communication difficulties. Referring to research on international education in Australia, which has the world’s fifth largest international student population, the article focuses on the manner in which the subordinated outsider status of international students magnifies the problems they face. It considers what might be done to enable them to access comprehensive protections, empowerment and human rights as defined in the United Nations’ Universal Declaration of Human Rights.  相似文献   
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A number of field-based investigations have evidenced practically significant relationships between clubhead velocity (CHV), vertical jump performance and maximum strength. Unfortunately, whilst these investigations provide a great deal of external validity, they are unable to ascertain vertical ground reaction force (vGRF) variables that may relate to golfers’ CHVs. This investigation aimed to assess if the variance in European Challenge Tour golfers’ CHVs could be predicted by countermovement jump (CMJ) positive impulse (PI), isometric mid-thigh pull (IMTP) peak force (PF) and rate of force development (RFD) from 0–50 ms, 0–100 ms, 0–150 ms and 0–200 ms. Thirty-one elite level European Challenge Tour golfers performed a CMJ and IMTP on dual force plates at a tournament venue, with CHV measured on a driving range. Hierarchical multiple regression results indicated that the variance in CHV was significantly predicted by all four models (model one R2 = 0.379; model two R2 = 0.392, model three R2 = 0.422, model four R2 = 0.480), with Akaike’s information criterion indicating that model one was the best fit. Individual standardised beta coefficients revealed that CMJ PI was the only significant variable, accounting for 37.9% of the variance in European Challenge Tour Golfers’ CHVs.  相似文献   
879.
    
ABSTRACT

The aims of this study were to analyse the optimal cadence for peak power production and time to peak power in bicycle motocross (BMX) riders. Six male elite BMX riders volunteered for the study. Each rider completed 3 maximal sprints at a cadence of 80, 100, 120 and 140 revs · min?1 on a laboratory Schoberer Rad Messtechnik (SRM) cycle ergometer in isokinetic mode. The riders’ mean values for peak power and time of power production in all 3 tests were recorded. The BMX riders produced peak power (1105 ± 139 W) at 100 revs · min?1 with lower peak power produced at 80 revs · min?1 (1060 ± 69 W, (F(2,15) = 3.162; P = .266; η2 = 0.960), 120 revs · min?1 (1077 ± 141 W, (F(2,15) = 4.348; P = .203; η2 = 0.970) and 140 revs · min?1 (1046 ± 175 W, (F(2,15) = 12.350; P = 0.077; η2 = 0.989). The shortest time to power production was attained at 120 revs · min?1 in 2.5 ± 1.07 s. Whilst a cadence of 80 revs · min?1 (3.5 ± 0.8 s, (F(2,15) = 2.667; P = .284; η2 = 0.800) 100 revs · min?1 (3.00 ± 1.13 s, (F(2,15) = 24.832; P = .039; η2 = 0.974) and 140 revs · min?1 (3.50 ± 0.88 s, (F(2,15) = 44.167; P = .006; η2 = 0.967)) all recorded a longer time to peak power production. The results indicate that the optimal cadence for producing peak power output and reducing the time to peak power output are attained at comparatively low cadences for sprint cycling events. These findings could potentially inform strength and conditioning training to maximise dynamic force production and enable coaches to select optimal gear ratios.  相似文献   
880.
全球知识经济中的高等教育   总被引:2,自引:0,他引:2  
许多国家的政府政策和学术工作都认同在世界范围的知识经济中,高等教育和研究的作用与日俱增,高等教育和知识同时具有全球性、国家性和地方性的特点。高等教育由国家政府各个部门共同孕育,而且其模式受到社会投资方式的影响,跨境或者全球层面的高等教育活动逐渐增加,尤其是对于知识而言。通过研究变化中的全球高等教育图景。可以为政府和国家政策、大学发展战略及国际机构提供建议。  相似文献   
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