全文获取类型
收费全文 | 38998篇 |
免费 | 672篇 |
国内免费 | 447篇 |
专业分类
教育 | 25040篇 |
科学研究 | 5340篇 |
各国文化 | 347篇 |
体育 | 3246篇 |
综合类 | 811篇 |
文化理论 | 273篇 |
信息传播 | 5060篇 |
出版年
2022年 | 246篇 |
2021年 | 678篇 |
2020年 | 681篇 |
2019年 | 701篇 |
2018年 | 884篇 |
2017年 | 881篇 |
2016年 | 875篇 |
2015年 | 904篇 |
2014年 | 1308篇 |
2013年 | 5295篇 |
2012年 | 1651篇 |
2011年 | 1845篇 |
2010年 | 1657篇 |
2009年 | 1565篇 |
2008年 | 1620篇 |
2007年 | 1700篇 |
2006年 | 1662篇 |
2005年 | 1426篇 |
2004年 | 925篇 |
2003年 | 810篇 |
2002年 | 818篇 |
2001年 | 905篇 |
2000年 | 753篇 |
1999年 | 686篇 |
1998年 | 448篇 |
1997年 | 381篇 |
1996年 | 410篇 |
1995年 | 325篇 |
1994年 | 307篇 |
1993年 | 260篇 |
1992年 | 387篇 |
1991年 | 379篇 |
1990年 | 339篇 |
1989年 | 364篇 |
1988年 | 325篇 |
1987年 | 310篇 |
1986年 | 320篇 |
1985年 | 348篇 |
1984年 | 278篇 |
1983年 | 282篇 |
1982年 | 224篇 |
1981年 | 222篇 |
1980年 | 228篇 |
1979年 | 329篇 |
1978年 | 233篇 |
1977年 | 212篇 |
1976年 | 185篇 |
1975年 | 164篇 |
1974年 | 168篇 |
1973年 | 164篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
As medical programs place increasing importance on competency-based training and surgical simulations for residents, anatomy laboratories, and body donation programs find themselves in a position of adapting to changing demands. To better assess the demand for “life-like” cadaveric specimens and evaluate the possible impacts that competency-based medical education could have upon the body donation program of McGill University, Canada, the authors tracked, over the course of the last 10 years, the number of soft-embalmed specimens, along with the number of teaching sessions and the residents enrolled in competency-based programs that are using cadaveric material. The results reveal that the number of soft-embalmed specimens used within residency training increased from 5 in 2009 to 35 in 2019, representing an increase from 6% of bodies to 36.5% of the total number of body donors embalmed in this institution. Correspondingly, the number of annual teaching sessions for residents increased from 19 in 2012 to 116 in 2019. These increases in teaching are correlated with increasing number of residents enrolled in competency-based programs over the last 3 years (Pearson r ranging from 0.9705 to 0.9903, and R2 ranging from 0.9418 to 0.9808). Those results suggest that the new skill-centered curricula which require residents to perform specific tasks within realistic settings, exhibit a growing demand for “life-like” cadaveric specimens. Institutions’ body donation programs must, therefore, adapt to those greater need for cadaveric specimens, which presents many challenges, ranging from the logistical to the ethical. 相似文献
2.
Jonathan J. Mallett 《Learned Publishing》2021,34(1):49-56
- Scientific publication has been a key part of the scientific method since the inception of Philosophical Transactions in 1665.
- The scientific publications industry has grown exponentially along with science, incorporating technological innovations along the way, and adapting journal processes and practices to changing needs of science as it matured.
- Of all the technological innovations over more than 300 years, the move to online journals may be the most significant, making open access to content practical for the first time.
- The open‐access movement is disrupting the economics of journal publishing, which is hoped will make the industry more competitive: the ability of the publications industry to adapt to open access will be a measure of its resilience.
- The demand for articles published in reputable journals continues to grow as readers trust the credibility of peer reviewed journal articles, and good authors value the prestige of publishing in the best journals.
- It is difficult to predict what new functionalities may be included in articles of the future or what additional services publishers and editors will provide, but there is every reason to believe that scientific journal articles are here to stay.
3.
[目的/意义] 探索构建文献情报大数据知识资源体系,支撑面向多领域的智慧知识服务。[方法/过程] 基于AI应用需求,借鉴业界经验,梳理现有资源体系的问题,从多层次多维度扩展资源体系;构建可靠数据处理流程和计算平台,支持高效数据采集和处理;研发智能化数据治理工具,实现知识资源的有效治理,确保提供高质量数据资源。[结果/结论] 已初步形成覆盖多类型、多学科的科技文献大数据知识资源体系,构建完成高度自动化的数据采集治理流程,实施多重数据质量控制,积累数亿高质量数据,且为多个知识服务提供数据支撑。 相似文献
4.
Michael J. Mouat 《Journal of Cultural Economy》2018,11(4):315-329
According to its proponents, animal-free animal food products, such as cultured meat and synthetic cow’s milk, have the potential to overcome various environmental, health and ethical challenges that have emerged around global animal product consumption and the industrial agriculture that is needed to support it. Apart from the myriad of technical problems making animal-free food products, critics have pointed out the blurry ontological status of the food and the ethical challenges therein, and have questioned the veracity of the various promissory narratives being produced. This paper considers animal-free food from a social studies of economies and markets (SSEM) perspective. As a market that currently mostly only exists in potential, an SSEM perspective can reveal the various social and material relations that comprise the (bio)capital formation that will underpin any market-to-be, an aspect of markets that are often invisible once markets are up and running. Moreover, this perspective details the intimate role markets have in establishing the ethical and ontological aspects of animal-free foods in a political economy shaped by neoliberalisation and financialisation. 相似文献
5.
Anthony J. Sadar 《Science & Education》2018,27(1-2):233-235
6.
7.
[目的/意义]欧洲阅读联盟是欧洲社会力量开展阅读活动的母平台,联盟成员所开展的阅读活动既有差异,也有共性,社会影响力大。通过对欧洲阅读联盟成员所办阅读活动及其规律的分析,可为我国公共图书馆主导与开展阅读活动提供借鉴。[方法/过程]概述欧洲阅读联盟,对其成员类型进行解析,并对每一成员的阅读项目进行共性分析,凝练出阅读活动的经验及规律。[结果/结论]我国应建立多级阅读推广力量,建立政府购买阅读服务长效机制,开放图书馆的阅读活动空间,提升阅读活动频率,开发多样化、差异化的阅读活动。 相似文献
8.
9.
10.