全文获取类型
收费全文 | 14330篇 |
免费 | 186篇 |
国内免费 | 7篇 |
专业分类
教育 | 10532篇 |
科学研究 | 1217篇 |
各国文化 | 83篇 |
体育 | 1120篇 |
综合类 | 12篇 |
文化理论 | 86篇 |
信息传播 | 1473篇 |
出版年
2021年 | 103篇 |
2020年 | 159篇 |
2019年 | 262篇 |
2018年 | 356篇 |
2017年 | 374篇 |
2016年 | 333篇 |
2015年 | 204篇 |
2014年 | 292篇 |
2013年 | 2650篇 |
2012年 | 312篇 |
2011年 | 371篇 |
2010年 | 267篇 |
2009年 | 230篇 |
2008年 | 334篇 |
2007年 | 240篇 |
2006年 | 309篇 |
2005年 | 212篇 |
2004年 | 207篇 |
2003年 | 179篇 |
2002年 | 241篇 |
2001年 | 323篇 |
2000年 | 296篇 |
1999年 | 263篇 |
1998年 | 129篇 |
1997年 | 160篇 |
1996年 | 177篇 |
1995年 | 180篇 |
1994年 | 142篇 |
1993年 | 163篇 |
1992年 | 237篇 |
1991年 | 210篇 |
1990年 | 209篇 |
1989年 | 244篇 |
1988年 | 247篇 |
1987年 | 206篇 |
1986年 | 208篇 |
1985年 | 220篇 |
1984年 | 191篇 |
1983年 | 230篇 |
1982年 | 171篇 |
1981年 | 159篇 |
1980年 | 156篇 |
1979年 | 230篇 |
1978年 | 182篇 |
1977年 | 164篇 |
1976年 | 149篇 |
1975年 | 128篇 |
1974年 | 119篇 |
1973年 | 125篇 |
1971年 | 107篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
993.
994.
995.
996.
Carolyn D. Rude 《Technical Communication Quarterly》2004,13(3):271-288
Preparing students for civic engagement requires new knowledge about the uses of documents for advocacy and social change. Substantial social change results from repeated rather than from single rhetorical acts. Reconsideration of the rhetorical canon of delivery suggests expanding the concept beyond its present connection to publication (visual design, medium) to a rhetorical situation comprehensively defined. Delivery may take place over time and embrace a web of activities including field work, updates, and interconnections with other publications. 相似文献
997.
How environmental knowledge measures up at a Big Ten university 总被引:1,自引:1,他引:0
The reported research examines the level of environmental knowledge of Michigan State University students relative to the results of a biannual national study of the environmental knowledge of the general population of the United States. While the university students were found to possess higher levels of environmental knowledge than the general public, the students' overall environmental knowledge, on average, was deficient with only 66% of them receiving a passing grade. The findings suggest a positive correlation between academic level, field of study and environmental knowledge. 相似文献
998.
ROBERT D. OSBORNE 《European Journal of Education》2006,41(1):113-129
This article examines three examples of cross-border higher education collaboration in Europe in order to throw light on one European region where such collaboration is only in its early stages of development. The main region examined is the Öresund region covering the Skåne area of Southern Sweden centred on Malmo and the Zealand region of Denmark which incorporates the Copenhagen region. Additionally, and more briefly, the Upper Rhine collaboration of the EUCOR universities and the ALMA collaboration (Netherlands, Germany and Belgium) are considered. Lessons from these examples are then used to assist in the assessment of existing collaboration between higher education institutions in the Republic of Ireland and Northern Ireland and the possibilities for further collaboration. 相似文献
999.
Measurement of ground reaction force (GRF) in running provides a direct indication of the loads to which the body is subjected
at each foot-ground contact, and can provide an objective explanation for performance outcomes. Traditionally, the collection
of three orthogonal component GRF data in running requires an athlete to complete a series of return loops along a laboratory
based runway, within which a force platform is embedded, in order to collect data from a discrete footfall. The major disadvantages
associated with this GRF data collection methodology include the inability to assess multiple consecutive foot contacts and
the fact that measurements are typically confined to the laboratory. The objective of this research was to investigate the
potential for wearable instrumentation to be employed, in conjunction with artificial neural network (ANN) and multiple linear
regression (MLR) models, for the estimation of GRF in middle distance running. A modular wearable data acquisition system
was developed to acquire in-shoe force (ISF) data. Matched data sets from wearable instrumentation (source data) and force
plate (target data) records were collected from elite middle-distance runners under controlled laboratory conditions for the
purposes of ANN and MLR model development (MD) and model validation (MV).
In terms of statistical measures of prediction accuracy the MLR model was found to provide a superior level of accuracy for
the prediction of the vertical and medio-lateral components of GRF and alternatively, the ANN model provided the most accurate
predictions of the anterior-posterior component of GRF. The prediction accuracy of each component of GRF was found to be governed
by the inherent signal variability, in which case the vertical and anterior-posterior components were more reliable and subsequently
predicted significantly more accurately than the medio-lateral component.
The emerging capability for obtaining continuous GRF records from wearable instrumentation has the potential to permit unprecedented
quantification of training stress and competition demands in running. 相似文献
1000.
This study had two purposes. First, we sought to compare the overall effectiveness of different types of fluency interventions for students with learning disabilities (LD). Second, we attempted to identify how individual‐ and class‐level characteristics moderated each intervention's effectiveness. We used multilevel random coefficient modeling to analyze results from 30 single‐subject studies involving 107 students with or at risk for LD. Doing so allowed us to assess the intervention's impact in terms of both intercept‐ (i.e., mean difference between study phases) and slope‐level (i.e., rate of growth) changes. Results indicated that two motivation‐focused interventions were significantly more effective than other types of interventions across gender, age, and placement. The least effective intervention was word recognition training; this finding was consistent across all levels of analyzed variables. 相似文献