全文获取类型
收费全文 | 13513篇 |
免费 | 189篇 |
国内免费 | 7篇 |
专业分类
教育 | 9836篇 |
科学研究 | 1199篇 |
各国文化 | 80篇 |
体育 | 1115篇 |
综合类 | 7篇 |
文化理论 | 86篇 |
信息传播 | 1386篇 |
出版年
2021年 | 102篇 |
2020年 | 154篇 |
2019年 | 253篇 |
2018年 | 350篇 |
2017年 | 360篇 |
2016年 | 329篇 |
2015年 | 201篇 |
2014年 | 279篇 |
2013年 | 2581篇 |
2012年 | 297篇 |
2011年 | 362篇 |
2010年 | 223篇 |
2009年 | 216篇 |
2008年 | 322篇 |
2007年 | 231篇 |
2006年 | 301篇 |
2005年 | 198篇 |
2004年 | 183篇 |
2003年 | 174篇 |
2002年 | 209篇 |
2001年 | 306篇 |
2000年 | 274篇 |
1999年 | 242篇 |
1998年 | 119篇 |
1997年 | 139篇 |
1996年 | 164篇 |
1995年 | 165篇 |
1994年 | 133篇 |
1993年 | 149篇 |
1992年 | 221篇 |
1991年 | 198篇 |
1990年 | 201篇 |
1989年 | 235篇 |
1988年 | 223篇 |
1987年 | 195篇 |
1986年 | 190篇 |
1985年 | 205篇 |
1984年 | 179篇 |
1983年 | 211篇 |
1982年 | 144篇 |
1981年 | 142篇 |
1980年 | 133篇 |
1979年 | 211篇 |
1978年 | 162篇 |
1977年 | 154篇 |
1976年 | 131篇 |
1975年 | 119篇 |
1974年 | 110篇 |
1973年 | 119篇 |
1971年 | 95篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Research in Higher Education - State financial aid grant programs are commonly categorized as either need-based, merit-based, or both, but their initial eligibility requirements include many more... 相似文献
2.
Hypocalcemia is a laboratory and clinical abnormality that is observed especially in neonates and paediatric patients. Laboratory hypocalcaemia is often asymptomatic but it can manifest as central nervous system irritability, paraesthesia, tetany (i.e. contraction of hands, arms, feet, larynx, bronchioles), seizures, and even psychiatric changes in children. Cardiac function may also be impaired because of poor muscle contractility. We report a unique case of an eleven year old male child who presented with chronic kidney disease associated with severe hypocalcemia, tonic-clonic seizures, hypovitaminosis D but normal electroencephalogram and electrocardiography. The child required prolonged intravenous calcium gluconate therapy to correct his ionised calcium levels. 相似文献
3.
Purpose: Overuse injuries are common in sport, but complete understanding of injury risk factors remains incomplete. Although biomechanical studies frequently examine musculoskeletal injury mechanisms, human movement variability studies aim to better understand neuromotor functioning, with proposed connections between overuse injury mechanisms and changes in motor variability. Method: In a narrative review, we discuss the variability-overuse injury hypothesis, which suggests repeated load application leads to mechanical tissue breakdown and subsequent injury when exceeding the rate of physiological adaptation. Due to the multidisciplinary nature of this hypothesis, we incorporate concepts from motor control, neurophysiology, biomechanics, as well as research design and data analysis. We therefore summarize multiple perspectives while proposing theoretical relationships between movement variability and lower extremity overuse injuries. Results: Experimental data are presented and summarized from published experiments examining interactions between experimental task demands and movement variability in the context of drop landing movements, along with comparisons to previous movement variability studies. Conclusion: We provide a conceptual framework for sports medicine researchers interested in predicting and preventing sports injuries. Under performance conditions with greater task demands, we predict reduced trial-to-trial movement variability that could increase the likelihood of overuse injuries. 相似文献
4.
Teachers participating in curricular reforms, especially reforms based on constructivism, are expected to bring about change in their teaching approach. This is often a difficult, complex and intensive process, and demands a radical reculturing of the classroom. This is also the case for social constructivist reforms in chemistry education, which are based on a context-based approach. Educational change is a social and interactional process, and during this change teachers will engage in negotiations with their students about the reform. These teacher–student negotiations have a profound impact on the succeeding of the reform. This study explores the teacher–student interactions during the reform that shape and alter the context-based chemistry approach. We focused on two teachers, of whom it was found in an earlier study that one of them succeeded in implementing the reform, while the other one struggled. By following them for one school year, in which in-depth qualitative data was collected through various instruments, we developed insights about the teacher–student negotiations that influenced the educational reform. Three themes emerged from the data: “agency of learning,” “vulnerability,” and “care.” The differences that were found between the teachers regarding these themes help explain why and how the reform can become a success and why the reform often fails to change classroom practice. 相似文献
5.
Ryan A. D’Souza Jessica S. Rauchberg 《Journal of International and Intercultural Communication》2020,13(2):183-196
ABSTRACTMargarita with a Straw is an Indian movie about a queer/disabled woman exploring her sexuality. The article uses textual analysis with a discursive formation approach to analyze how the protagonist’s queer/disabled identity is constituted vis-à-vis intimate partnerships alongside the promotion of neoliberal values. One relationship with an able-bodied white man takes place within a caregiving dynamic that challenges her independence. The other relationship with a disabled South Asian woman creates an interdependence that bifurcates their identities as disabled-and-queer. The article argues that the promotion of neoliberal values in the context of queer/disability is about independence from dependence on sociopolitical systems. 相似文献
6.
ABSTRACTThis study operationalized Weick’s [(1988). Enacted sensemaking in crisis situations. Journal of Management Studies 25(4), 305–317 and (1993). The collapse of sensemaking in organizations: The Mann Gulch disaster. Administrative Science Quarterly, 38, 628–652] theory of enacted sensemaking to examine the communication processes associated with the Flint Water Crisis of 2014–2015. A content analysis of 389 emails and attachments from a total population of N?=?37,376 pages of publicly released e-mails and documents pertaining to Flint’s water issues, identified examples of failed sensemaking by government officials. These failures hastened and intensified a growing crisis of lead contamination and an outbreak of Legionnaires disease associated with Flint’s municipal water system. Analysis of email messages suggests that strong commitments by top leaders and limited capacity were important factors as were efforts to create and maintain consensus among officials. The Flint Water Crisis offers an important application of sensemaking theory and its utility for both organizational and risk communication scholars and for practical application. The authors emphasize the importance of questioning previous assumptions and commitments, insuring that communication practitioners are involved in decisions, and avoiding over reliance on image repair as a strategic response. 相似文献
7.
8.
The aim of this study was to examine the impact of contextual factors on relative locomotor and metabolic power distances during professional female soccer matches. Twenty-eight players (forwards, n?=?4; midfielders, n?=?12; defenders, n?=?12) that competed in a 90-min home and away match (regular season only). The generalised estimating equations (GEE) was used to evaluate relative locomotor and metabolic power distances for three contextual factors: location (home vs. away), type of turf (natural vs. artificial), and match outcome (win, loss and draw). No differences were observed for home vs. away matches. Moderate-intensity running (20.0?±?1.0?m?min?1 and 16.4?±?0.9?m?min?1), high-intensity running (8.6?±?0.4?m?min?1 and 7.3?±?0.4?m?min?1) and high-metabolic power (16.3?±?0.5?m?min?1 and 14.4?±?0.5?m?min?1) distances were elevated on artificial turf compared to natural grass, respectively. Relative sprint distance was greater during losses compared with draws (4.3?±?0.4?m?min?1 and 3.4?±?0.3?m?min?1). Overall physical demands of professional women’s soccer were not impacted by match location. However, the elevation of moderate and high-intensity demands while playing on artificial turf may have implications on match preparations as well as recovery strategies. 相似文献
9.
Transitioning into faculty roles can be a challenging experience. Responsibilities related to teaching, research, and service can be difficult to balance, and mismatch between personal preferences for work focus and instructional expectations can be problematic. This is particularly true of visiting assistant professors who want to work toward tenure-track positions, but whose current job focus is on teaching. Through transformative learning theory and employing the methodologies of self-study, we sought to understand the experiences of Kevin, the second author and a first-year visiting assistant professor. We draw data from Kevin's reflective journal and discussions between Kevin and his critical friend, Jim. Themes included (a) becoming an academic, (b) a hard-wired disposition toward work, and (c) influence of the VAP on emotional and personal health. Results are discussed through the lens of transformative learning theory and focus on Kevin's growth during his year as a visiting assistant professor. 相似文献
10.
Research remains unclear on the impact of physiological load on perceptual-cognitive skills in sport. Moreover, no study has examined the training of perceptual-cognitive skills under physiological load. The current study comprised two phases. Firstly, we examined the impact of badminton-specific physiological load on anticipatory skills in expert badminton players (n = 13), including key underlying mechanisms, such as gaze behaviour. Under high physiological load, participants displayed less efficient visual search behaviour and showed a reduction in response accuracy. Secondly, we examined the effects of combining perceptual-cognitive simulation training with the high physiological load. Ten of the expert badminton players were assigned to a combined training group, where the simulation training and the physiological load intervention occurred simultaneously or an independent training group, whereby the two components were completed independently. The combined training group showed a positive change in the efficiency of their visual search behaviours compared to the independent training group, but no significant performance improvements were found. Overall, findings demonstrate that high physiological load is detrimental to experts’ anticipatory skills. However, combining perceptual-cognitive simulation training with high physiological load can potentially negate these debilitating effects. 相似文献