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151.
Michael G. Hughes Laurence Birdsey Rob Meyers Daniel Newcombe Jon Lee Oliver Paul M. Smith 《Journal of sports sciences》2013,31(8):878-886
Abstract In spite of the increased acceptance of artificial turf in football, few studies have investigated if matches are altered by the type of surface used and no research has compared physiological responses to football activity on artificial and natural surfaces. In the present study, participants performed a football match simulation on high-quality artificial and natural surfaces. Neither mean heart rate (171 ± 9 beats · min?1 vs. 171 ± 9 beats · min?1; P > 0.05) nor blood lactate (4.8 ± 1.6 mM vs. 5.3 ± 1.8 mM; P > 0.05) differed between the artificial and natural surface, respectively. Measures of sprint, jumping and agility performance declined through the match simulation but surface type did not affect the decrease in performance. For example, the fatigue index of repeated sprints did not differ (P > 0.05) between the artificial, (6.9 ± 2.1%) and natural surface (7.4 ± 2.4%). The ability to turn after sprinting was affected by surface type but this difference was dependent on the type of turn. Although there were small differences in the ability to perform certain movements between artificial and natural surfaces, the results suggest that fatigue and physiological responses to football activity do not differ markedly between surface-type using the high-quality pitches of the present study. 相似文献
152.
Markus J. Klusemann David B. Pyne Carl Foster Eric J. Drinkwater 《Journal of sports sciences》2013,31(14):1463-1471
Abstract Differences in physiological, physical, and technical demands of small-sided basketball games related to the number of players, court size, and work-to-rest ratios are not well characterised. A controlled trial was conducted to compare the influence of number of players (2v2/4v4), court size (half/full court) and work-to-rest ratios (4x2.5 min/2x5 min) on the demands of small-sided games. Sixteen elite male and female junior players (aged 15–19 years) completed eight variations of a small-sided game in randomised order over a six-week period. Heart rate responses and rating of perceived exertion (RPE) were measured to assess the physiological load. Movement patterns and technical elements were assessed by video analysis. There were ~60% more technical elements in 2v2 and ~20% more in half court games. Heart rate (86 ± 4% & 83 ± 5% of maximum; mean ± SD) and RPE (8 ± 2 & 6 ± 2; scale 1–10) were moderately higher in 2v2 than 4v4 small-sided games, respectively. The 2v2 format elicited substantially more sprints (36 ±12%; mean ±90% confidence limits) and high intensity shuffling (75 ±17%) than 4v4. Full court games required substantially more jogging (9 ±6%) compared to half court games. Fewer players in small-sided basketball games substantially increases the technical, physiological and physical demands. 相似文献
153.
Hughes JN 《The Elementary school journal》2011,112(1):38-60
The shared and unique effects of teacher and student reports of teacher student relationship quality (TSRQ) in second and third grade on academic self views, behavioral engagement, and achievement the following year were investigated in a sample of 714 academically at-risk students. Teacher and student reports of teacher-student support and conflict showed low correspondence. As a block, teacher and student reports of TSRQ predicted all outcomes, above prior performance on that outcome and background variables. Student reports uniquely predicted school belonging, perceived academic competence, and math achievement. Teacher reports uniquely predicted behavioral engagement and child perceived academic competence. Teacher and student reports of the teacher-student relationship assess largely different constructs that predict different outcomes. Implications of findings for practice and research are discussed. 相似文献
154.
In this article, the authors examine three Canadian coming-of-age stories, written as graphic novels, and pay particular attention to how the images and print text come together in the telling of the narrative. This approach reinforces the notion that form and content cannot be separated in this medium. Drawing on examples from each of the graphic novels and the interviews with the graphic novelists who wrote them, the article explores the complexity of the coming-of-age theme in each graphic novel, as well as how print text and image converge to make meaning. 相似文献
155.
Carl Bereiter 《Interchange》1970,1(1):25-32
Kohlberg's attempt to derive from cognitive-developmental theory the conclusion that specific instruction cannot contribute significantly to cognitive development is viewed as a category error, an attempt to set into opposition two concepts that are not of the same type. His distinctions of structural versus nonstructural, generalized versus situation-specific, and permanent versus impermanent behavior change are found to apply equally to changes resulting from instruction and natural behavior changes. It is suggested that a more educationally relevant distinction is one between developmental accomplishments that depend upon adult-child interaction and those that do not.
Résumé La tentative de Kohlberg visant à conclure, à partir de la théorie du développement cognitif, que l'enseignement spécifique ne peut pas contribuer de façon importante au développement cognitif, est considérée comme une erreur de catégorie dans ce sens que sa thèse cherche à mettre en opposition deux concepts d'ordre différent. En effet, les distinctions que Kohlberg approte entre le changement structural et non structural au niveau du comportement, généralisé et limité à un cas particulier, permanent et transitoire s'avèrent également applicables aux changements attribuables à l'enseignement et aux changements naturels du comportement. L'article suggère qu'une distinction plus pertinente du point de vue éducationnel est celle qu'on établit entre les réalisations du développement qui dépendent de l'action réciproque de l'adulte et de l'enfant et celles qui n'en dépendent pas.相似文献
156.
Carl L. Kline M.D. Marjorie Ashbrenner M.A. Byron Barrington PhD Louis Reimer M.S.W. 《Annals of dyslexia》1968,18(1):23-31
Summary A new index for expressing degree of reading disability in children is presented. Called the Dyslexia Quotient (D. Q.), it has the advantages of being simple to calculate and of being expressed in round numbers. Standardization of this new index is presented. In addition, the use of the Dyslexia Quotient in 50 patients who completed intensive dyslexia therapy is presented. An age-improvement distribution diagram, using the D. Q. is given. The authors suggest that the Dyslexia Quotient offers a valuable universal means of indicating degree of reading disability at any grade or age level. 相似文献
157.
Abstract The recent introduction of micro‐computers into schools is opening up many new avenues for developmental psychologists interested in studying how children learn. Of particular interest at present are approaches in which children program computers themselves, using languages such as LOGO and PROLOG. This paper describes a study in which a simplified version of LOGO was introduced to a group of six‐year‐olds in a severely deprived area of Edinburgh. The children used a special touch‐sensitive keyboard (Concept Keyboard) to control the movements of a floor‐crawling robot called a Turtle. The sessions with the Turtle were marked by high levels of concentration, collaborative problem‐solving and the use of mathematical language. Pre‐ and post‐tests on the British Ability Scales revealed statistically significant gains on the sub‐scales concerned with number and shape: these gains, however, were found only in the boys. 相似文献
158.
Xiangcheng Mi Gang Feng Yibo Hu Jian Zhang Lei Chen Richard T Corlett Alice C Hughes Stuart Pimm Bernhard Schmid Suhua Shi Jens-Christian Svenning Keping Ma 《国家科学评论(英文版)》2021,8(7):29-53
Biodiversity science in China has seen rapid growth over recent decades, ranging from baseline biodiversity studies to understanding the processes behind evolution across dynamic regions such as the Qinghai-Tibetan Plateau. We review research, including species catalogues; biodiversity monitoring; the origins, distributions, maintenance and threats to biodiversity; biodiversity-related ecosystem function and services; and species and ecosystems’ responses to global change. Next, we identify priority topics and offer suggestions and priorities for future biodiversity research in China. These priorities include (i) the ecology and biogeography of the Qinghai-Tibetan Plateau and surrounding mountains, and that of subtropical and tropical forests across China; (ii) marine and inland aquatic biodiversity; and (iii) effective conservation and management to identify and maintain synergies between biodiversity and socio-economic development to fulfil China''s vision for becoming an ecological civilization. In addition, we propose three future strategies: (i) translate advanced biodiversity science into practice for biodiversity conservation; (ii) strengthen capacity building and application of advanced technologies, including high-throughput sequencing, genomics and remote sensing; and (iii) strengthen and expand international collaborations. Based on the recent rapid progress of biodiversity research, China is well positioned to become a global leader in biodiversity research in the near future. 相似文献
159.
Samuel W. Oxford Rob S. James Michael J. Price Carl J. Payton Michael J. Duncan 《Journal of sports sciences》2017,35(16):1658-1665
The purpose of this study was to compare arm–leg coordination and kinematics during 100 m breaststroke in 26 (8 female; 18 male) specialist breaststroke swimmers. Laps were recorded using three 50-Hz underwater cameras. Heart rate and blood lactate were measured pre- and post-swim. Arm–leg coordination was defined using coordination phases describing continuity between recovery and propulsive phases of upper and lower limbs: coordination phase 1 (time between end of leg kick and start of the arm pull phases); and coordination phase 2 (time between end of arm pull and start of leg kick phases). Duration of stroke phases, coordination phases, swim velocity, stroke length (SL), stroke rate (SR) and stroke index (SI) were analysed during the last three strokes of each lap that were unaffected by turning or finishing. Significant changes in velocity, SI and SL (P < 0.05) were found between laps. Both sexes showed significant increase (P < 0.05) in heart rate and blood lactate pre- to post-swim. Males had significantly (P < 0.01) faster swim velocities resulting from longer SLs (P = 0.016) with no difference in SR (P = 0.064). Sex differences in kinematic parameters can be explained by anthropometric differences providing males with increased propelling efficiency. 相似文献
160.
Laura Hills Anactoria Clarke Jonathan Hughes John Butcher Isobel Shelton Elaine McPherson 《Open Learning》2013,28(3):238-249
Ensuring the fairness of assessment is important in all areas of higher education. It is particularly so in distance education, where the communication around assessment and feedback is a principal method of supporting learning, and even more so when the students are at the entry point into higher education. This research explores the nature of the language used in explaining the purpose and process of assessment on an access programme at The Open University, UK, from the perspective of the module team, the tutors and the students. It takes a qualitative approach to examine the clarity and consistency of assessment tasks, assessment guidance and TMGs. Analysis revealed inconsistencies in the language used in relation to assessment, which has led to a revision of how assessment tasks and guidance are communicated to students and tutors. 相似文献