全文获取类型
收费全文 | 21340篇 |
免费 | 410篇 |
国内免费 | 456篇 |
专业分类
教育 | 11607篇 |
科学研究 | 4499篇 |
各国文化 | 115篇 |
体育 | 1230篇 |
综合类 | 1183篇 |
文化理论 | 124篇 |
信息传播 | 3448篇 |
出版年
2024年 | 1篇 |
2023年 | 20篇 |
2022年 | 214篇 |
2021年 | 588篇 |
2020年 | 464篇 |
2019年 | 221篇 |
2018年 | 224篇 |
2017年 | 279篇 |
2016年 | 218篇 |
2015年 | 653篇 |
2014年 | 1073篇 |
2013年 | 1338篇 |
2012年 | 1566篇 |
2011年 | 1730篇 |
2010年 | 1588篇 |
2009年 | 1502篇 |
2008年 | 1426篇 |
2007年 | 1650篇 |
2006年 | 1628篇 |
2005年 | 1426篇 |
2004年 | 749篇 |
2003年 | 627篇 |
2002年 | 634篇 |
2001年 | 549篇 |
2000年 | 389篇 |
1999年 | 332篇 |
1998年 | 255篇 |
1997年 | 189篇 |
1996年 | 152篇 |
1995年 | 105篇 |
1994年 | 104篇 |
1993年 | 79篇 |
1992年 | 73篇 |
1991年 | 39篇 |
1990年 | 32篇 |
1989年 | 24篇 |
1988年 | 11篇 |
1987年 | 1篇 |
1986年 | 6篇 |
1985年 | 16篇 |
1984年 | 11篇 |
1983年 | 10篇 |
1981年 | 3篇 |
1979年 | 4篇 |
1957年 | 3篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
991.
在现代社会,思想政治教育不仅没有退出历史舞台,反而得到更为丰富的发展,为我国经济工作、政治工作等社会主义各项事业提供着强大的理论支撑和智力支持。究其原因,思想政治教育的科学性是其理论动因,思想政治教育的政治性是其外部动因,思想政治教育的价值性是其内部动因,思想政治教育的草根性是其社会动因。 相似文献
992.
新媒体视阈下的高校思想文化建设问题研究 总被引:2,自引:0,他引:2
高校思想文化的协调和可持续发展,将为学校树立起完整的文化形象。在新媒体视阈下,由于新媒体传播信息更主动、更迅速、更隐蔽,信息甄别工作更为困难,使得高校思想文化建设面临着巨大的威胁和挑战。因此,高校应采取有效措施,主动驾驭新媒体,主动把握信息源,建好主题网站,加强舆论监督,从而推动校园思想文化建设。 相似文献
993.
994.
Heart rate variability (HRV) analysis is affected by ectopic beats. An efficient method was proposed to deal with the ectopic
beats. The method was based on trend correlation of the heart timing signal. Predictor of R-R interval (RRI) value at ectopic
beat time was constructed by the weight calculation and the slope estimation of preceding normal RRI. The type of ectopic
beat was detected and replaced by the predictor of RRI. The performance of the simulated signal after ectopic correction was
tested by the standard value using power spectrum density (PSD) estimation, whereas the results of clinical data with ectopic
beats were compared with the adjacent ectopic-free data. The result showed the frequency indexes after ectopy corrected had
less error than other methods with the test of simulated signal and clinical data. It indicated our method could improve the
PSD estimation in HRV analysis. The method had advantages of high accuracy and real time properties to recover the sinus node
modulation. 相似文献
995.
He XL Yin HL Wu J Zhang K Liu Y Yuan T Rao HL Li L Yang G Zhang XM 《Journal of Zhejiang University. Science. B》2011,12(1):32-39
Radiation therapy has been widely applied in cancer treatment. However, it often causes thrombocytopenia (deficiency of white
blood cells) as an adverse effect. Recombinant human interleukin-6 (rhIL-6) has been found to be a very effective way against
this thrombocytopenia, but IL-6 has low stability in blood, which reduces its efficacy. To increases the stability and half-life
of rhIL-6, it was modified by polyethylene glycol (PEG). The pharmacokinetics and the tissue distribution of PEG-rhIL-6 labeled
with 125I were examined after subcutaneous injection in rats. The pharmacokinetic pattern of PEG-rhIL-6 was defined with linear-kinetics,
and we fitted a one-compartment model with half-lives of 10.44–11.37 h (absorption, t
1/2K
a) and 19.77–21.53 h (elimination, t
1/2Ke), and peak concentrations at 20.51–21.96 h (t
peak) in rats. Half-lives and t
peak of PEG-rhIL-6 were longer than those of rhIL-6 previously reported. In the present study, for deposition of PEG-rhIL-6 in
rats, the tissue distribution examination showed that blood was the major organ involved, rather than liver. However, as to
the elimination of PEG-rhIL-6, the major organ was the kidney. The excretion fraction of the injection dose recovered from
urine was 23.32% at 192 h after subcutaneous administration. Less than 6% of PEG-rhIL-6 was eliminated via the feces at 192
h. These results indicate that PEG-rhIL-6 is a good candidate drug formulation for patients with cancer. 相似文献
996.
997.
北京首推高职院校“高会统招”录取模式,是高职院校招生录取模式多元化发展的一种新探索,“高会统招”采用突出专业、分数优先的投档方式,更加体现出对学校和考生考试科日话语权的尊重。新模式旨在减轻学生负担,突显职业教育的专业本位,本文将从政策学的角度对“高会统招”模式的政策方案、政策目标及政策建议进行探析,以期实现高等职业教育的有序、特色发展。 相似文献
998.
999.
Yong Zhou 《Frontiers of Education in China》2011,6(2):167-181
The turn towards using domestic experience in contemporary Chinese educational studies has led to the development of theoretical
frames rooted in the reality of Chinese society. This article identifies four ways of understanding and reforming Chinese
society that have been developed by 20th century Chinese educators. By reflecting on these four approaches, and on the modern
value oriented reactions to social transformation expressed by contemporary Western educational scholars, this article argues
that Chinese educational scholars face two essential tasks when developing theories based on domestic experience so as to
make positive contributions to China’s unfinished project of modernity. The first is to study the phenomena of imbalance,
alienation, and backwardness caused by all kinds of economic and cultural movements and forces in the huge space of Chinese
society, and the second is to develop progressive educational ideas that are robust enough to counter these phenomena. 相似文献
1000.
For the dynamic demand assessment of bridge structures under ship impact loading, it may be prudent to adopt analytical models
which permit rapid analysis with reasonable accuracy. Herein, a nonlinear dynamic macro-element is proposed and implemented
to quantify the demand of bridge substructures subjected to ship collisions. In the proposed nonlinear macro-element, a combination
of an elastic-plastic spring and a dashpot in parallel is employed to describe the mechanical behavior of ship-bows with strain
rate effects. Based on the analytical model using the proposed macro-element, a typical substructure under 5000 deadweight
tonnage (DWT) ship collision is discussed. Our analyses indicate that the responses of the structure using the nonlinear macro-element
agree with the results from the high resolution model, but the efficiency and feasibility of the proposed method increase
significantly in practical applications. Furthermore, comparisons between some current design codes (AASHTO, JTGD60-2004,
and TB10002.1-2005) and the developed dynamic analysis method suggest that these design codes may be improved, at least to
consider the effect of dynamic amplification on structural demand. 相似文献