全文获取类型
收费全文 | 785篇 |
免费 | 21篇 |
专业分类
教育 | 601篇 |
科学研究 | 25篇 |
各国文化 | 10篇 |
体育 | 114篇 |
文化理论 | 4篇 |
信息传播 | 52篇 |
出版年
2023年 | 4篇 |
2022年 | 11篇 |
2021年 | 13篇 |
2020年 | 26篇 |
2019年 | 42篇 |
2018年 | 58篇 |
2017年 | 43篇 |
2016年 | 41篇 |
2015年 | 31篇 |
2014年 | 28篇 |
2013年 | 192篇 |
2012年 | 30篇 |
2011年 | 23篇 |
2010年 | 22篇 |
2009年 | 27篇 |
2008年 | 23篇 |
2007年 | 16篇 |
2006年 | 15篇 |
2005年 | 16篇 |
2004年 | 9篇 |
2003年 | 10篇 |
2002年 | 10篇 |
2001年 | 9篇 |
2000年 | 5篇 |
1999年 | 13篇 |
1998年 | 2篇 |
1997年 | 4篇 |
1996年 | 7篇 |
1995年 | 7篇 |
1994年 | 6篇 |
1993年 | 12篇 |
1992年 | 6篇 |
1991年 | 2篇 |
1990年 | 3篇 |
1989年 | 4篇 |
1988年 | 8篇 |
1987年 | 3篇 |
1986年 | 2篇 |
1985年 | 2篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1980年 | 2篇 |
1978年 | 3篇 |
1976年 | 3篇 |
1971年 | 1篇 |
1969年 | 1篇 |
1934年 | 1篇 |
1929年 | 1篇 |
1926年 | 1篇 |
1925年 | 1篇 |
排序方式: 共有806条查询结果,搜索用时 906 毫秒
51.
João Pedro Araújo Naves Ana Cristina Silva Rebelo Lucas Raphael Bento E Silva Maria Sebastiana Silva Rodrigo Ramirez-Campillo Robinson Ramírez-Vélez 《European Journal of Sport Science》2019,19(5):653-660
High Intensity Interval Training (HIIT) can be performed with different effort to rest time-configurations, and this can largely influence training responses. The purpose of the study was to compare the acute physiological responses of two HIIT and one moderate intensity continuous training (MICT) protocol in young men. A randomised cross-over study with 10 men [age, 28.3?±?5.5years; weight, 77.3?±?9.3?kg; height, 1.8?±?0.1?m; peak oxygen consumption (VO2peak), 44?±?11?mL.kg?1.min?1]. Participants performed a cardiorespiratory test on a treadmill to assess VO2peak, velocity associated with VO2peak (vVO2peak), peak heart rate (HRpeak) and perceived exertion (RPE). Then participants performed three protocols equated by distance: Short HIIT (29 bouts of 30s at vVO2peak, interspersed by 30s of passive recovery, 29?min in total), Long HIIT (3 bouts of 4?min at 90% of vVO2peak, interspersed by 3?min of recovery at 60% of vVO2peak, 21?min in total) and MICT (21?min at 70% of vVO2peak). The protocols were performed in a randomised order with ≥48 h between them. VO2, HRpeak and RPE were compared. VO2peak in Long HIIT was significantly higher than Short HIIT and MICT (43?±?11 vs 32?±?8 and 37?±?8?mL.kg?1.min?1, respectively, P?0.05), as well as peak HR (181?±?10 vs 168?±?8 and 167?±?11, respectively, P?0.05), and RPE (17?±?4 vs 14?±?4 and 15?±?4, respectively, P?0.05), with no difference between Short HIIT and MICT. In conclusion, Long HIIT promoted higher acute increases in VO2, HR and RPE than Short HIIT and MICT, suggesting a higher demand on the cardiorespiratory system. Short HIIT and MICT presented similar physiologic and perceptual responses, despite Short HIIT being performed at higher velocities. 相似文献
52.
Marcelo Bigliassi João P. A. Greca Vinícius Barreto-Silva Priscila Chierotti Arli R. de Oliveira Leandro R. Altimari 《Journal of sports sciences》2019,37(5):525-536
The present experiment sought to further understanding of the effects of personalised audiovisual stimuli on psychological and psychophysiological responses during exercise in adults with obesity. Twenty-four participants (Mage = 28.3, SD = 5.5 years; MBMI = 32.2, SD = 2.4) engaged in self-paced exercises on a recumbent cycle ergometer and three conditions (sensory stimulation [ST], sensory deprivation [DE], and control [CO]) were administered. Perceptual (attentional focus and perceived exertion), affective (affective state and perceived activation), and psychophysiological (heart rate variability) parameters were monitored throughout the exercise bouts. A one-way repeated measures analysis of variance was used to compare self-reported and psychophysiological variables (main and interaction effects [5 Timepoints × 3 Conditions]). The results indicate that ST increased the use of dissociative thoughts throughout the exercise session (ηp2 = .19), ameliorated fatigue-related symptoms (ηp2 = .15) and elicited more positive affective responses (ηp2 = .12) than CO and DE. Accordingly, personally-compiled videos are highly effective in ameliorating exertional responses and enhancing affective valence during self-paced exercise in adults with obesity. Audiovisual stimuli could be used during the most critical periods of the exercise regimen (e.g., first training sessions) when individuals with obesity are more likely to focus on fatigue-related sensations. 相似文献
53.
Jo Ann F. Murphy 《图书馆管理杂志》2017,57(7):742-757
In 2015, student learning programs at the University of Saskatchewan moved organizationally to the university library. While these services resided physically in the library as part of the Learning Commons partnership, this recent change presents the library with a new focus and responsibility for broader student learning support and academic skill development. Highlighting examples of organizational integration of student learning support, this article uses a proximity perspective, suggesting that geographical proximity of services in the learning commons does not go far enough to achieve the deeper collaboration and integration necessary for holistic and integrated learning, and that organizational proximity is needed. 相似文献
54.
Evdokimova Olga L. Alves Carla S. Krsmanović Whiffen Radenka M. Ortega Zaida Tomás Helena Rodrigues João 《Journal of Zhejiang University. Science. B》2021,22(6):450-461
In this study, the fibers of invasive species Agave americana L. and Ricinus communis L. were successfully used for the first time as new sources to produce cytocompatible and highly crystalline cellulose nanofibers. Cellulose nanofibers were obtained by two methods, based on either alkaline or acid hydrolysis. The morphology, chemical composition, and crystallinity of the obtained materials were characterized by scanning electron microscopy(SEM) together with energy-dispersive X-ray spectroscopy(EDX), dynamic light scattering(DLS), X-ray diffraction(XRD), and Fourier transform infrared(FTIR)spectroscopy. The crystallinity indexes(CIs) of the cellulose nanofibers extracted from A. americana and R. communis were very high(94.1% and 92.7%, respectively). Biological studies evaluating the cytotoxic effects of the prepared cellulose nanofibers on human embryonic kidney 293 T(HEK293 T) cells were also performed. The nanofibers obtained using the two different extraction methods were all shown to be cytocompatible in the concentration range assayed(i.e., 0-500 μg/mL). Our results showed that the nanocellulose extracted from A. americana and R. communis fibers has high potential as a new renewable green source of highly crystalline cellulose-based cytocompatible nanomaterials for biomedical applications. 相似文献
55.
Jo Barkham 《British Educational Research Journal》2008,34(6):839-853
This article explores some of the issues around the agenda for workforce reform as it applies to professionals who work in early years classrooms (4–7 year olds), who work alongside class teachers in supporting learning. Their changing roles, responsibilities and professional identities are examined through a small scale case study of four women, two nursery nurses and two teaching assistants, from an infants school in a suburb of Bristol. Their close professional and personal relationships with the six female class teachers with whom thery work are considered. Their stories are analysed for their significance as women whose levels of skill and dedication are undervalued in terms of career structure, salary and job security. Whilst contributing to the debates around the changing roles and the valuable work of teaching assistants, this research endorses the view that these professionals' voices are too often silenced in educational debates and in strategic decision making. 相似文献
56.
The work practices of the professional photojournalist are currently undergoing rapid change in the digital era. New technologies, new platforms and new methods of visual storytelling are exerting a range of pressures and influences that require photojournalists to adapt and respond in different ways. The changes provoke a number of questions that are critical to the future of professional photojournalism: What are the new risks being faced by photojournalists? How are the transformations in the media economy affecting photojournalists’ employment? What does this mean for image quality? How do photojournalists think about the manipulation of images or the staging of events? Given the rise of citizen journalism, digital technology and social media, will there even be professional photojournalists in the future? This paper presents some of the results and new analysis from the first international study into the current state and future of professional photojournalism, with a specific focus on risk and on perceptions of risk among photographers. The results indicate a high degree of risk is experienced among professional photographers with a very strong correlation to the country in which they are based. 相似文献
57.
58.
Validity evidence for the Chinese version Classroom Appraisal of Resources and Demands (CARD) 下载免费PDF全文
Juan Zhang Chuang Wang Richard Lambert Chenggang Wu Hongbo Wen 《Psychology in the schools》2017,54(9):1079-1093
The Classroom Appraisal of Resources and Demands (CARD) was designed to evaluate teacher stress based on subjective evaluations of classroom demands and resources. However, the CARD has been mostly utilized in western countries. The aim of the current study was to provide aspects of the validity of responses to a Chinese version of the CARD that considers Chinese teachers’ unique vocational conditions in the classroom. A sample of 580 Chinese elementary school teachers (510 female teachers and 70 male teachers) were asked to respond to the Chinese version of the CARD. Confirmatory factor analyses showed that the data fit the theoretical model very well (e.g., CFI: .982; NFI: .977; GFI: .968; SRMR: .028; RMSEA: .075; where CFI is comparative fit index, NFI is normed fit index, GFI is goodness of fit, SRMR is standardized root mean square residual, RMSEA is root mean square error of approximation), thus providing evidence of construct validity. Latent constructs of the Chinese version of the CARD were also found to be significantly associated with other measures that are related to teacher stress such as self‐efficacy, job satisfaction, personal habits to deal with stress, and intention to leave their current job. 相似文献
59.
60.
Iris Keating Jo Basford Elaine Hodson Angela Harnett 《International Journal of Early Years Education》2002,10(3):193-203
Teachers of children aged four and five years in England (the Foundation Stage), since 2000, have been bound by the Curriculum Guidance produced by central UK Government. We were interested to learn of the responses of these teachers to this newly introduced document. We found that teachers welcomed the Foundation Stage Curriculum Guidance, not least because it recognised that there exists a valuable and separate stage in children's education. Further, the teachers were relieved that there was, within the document, the acknowledgement of the importance and value of play as integral to the educational needs of young children. The teachers indicated that the document was also beneficial in that it allowed them to return openly to what they felt to be sound Early Years practice which some had felt had been undermined by previous curriculum guidance. However, concerns remained in that not all stakeholders are yet aware of the needs of young children and of the resources necessary to meet these needs. En Angleterre, depuis 2000, les enseignants des enfants de quatre et cinq ans (phase dite de 'fondation') doivent se conformer à la Curriculum Guidance (Lignes directrices des programmes scolaires) produite par le gouvernement central du Royaume-Uni. Nous souhaitions connaître les réactions de ces enseignants face à ce nouveau document. Nous avons constaté que les enseignants accueillent favorablement la Foundation Stage Curriculum Guidance tant elle reconnaît l'existence d'une phase utile et distincte d'assimilation chez les enfants. En outre, les enseignants ont été soulagés de constater que la document reconnaît l'importance et l'utilité du jeu comme faisant partie intégrante des besoins éducatifs des jeunes écoliers. Ils ont également fait savoir qu'ils trouvent ce document utile dans la mesure où il leur permet de revenir ouvertement à des pratiques qu'ils considèrent comme étant saines pendant les premières années scolaires des enfants et qui, selon certains, avaient été amoindries par les lignes directrices des programmes scolaires précédents. Ils s'avèrent néanmoins toujours préoccupés du fait que toutes les parties prenantes ne sont pas encore conscientes des besoins des jeunes enfants et des ressources nécessaires pour les satisfaire. Desde el año 2000, en Inglaterra, los profesores de niños de la edad de 4 y 5 años (la Etapa de Fundación) han tenido que conformar con las reglas de curriculum introducidas por el gobierno central del Reino Unido. Tuvimos interes de enterarnos de las respuestas de aquellos profesores a ese documento nuevo. Encontramos que los profesores estan de acuerdo con la 'Guía de Curriculum de la Etapa de Fundación', por lo menos porque reconoció que existe una etapa válida y aparte en la educación de niños. Además estuvieron contentos que el documento reconició la importancia y validez de juegos infántiles imprescindible en el desarrollo del niño. Los profesores indicáron que el documento fue beneficioso también porque les permitió volver abiertamente a lo que sentieron que fueron 'prácticas sanas' de los años primeros que algunos de ellos pensaron que habían estado desacreditadas por las 'Guías de Curriculum' previas. No obstante quedan preocupaciónes que algunos interesados todavía no estan enterados de lo que los niños necesitan y los recursos que hacen falta. 相似文献