全文获取类型
收费全文 | 2381篇 |
免费 | 23篇 |
国内免费 | 20篇 |
专业分类
教育 | 1169篇 |
科学研究 | 196篇 |
各国文化 | 1篇 |
体育 | 29篇 |
综合类 | 67篇 |
文化理论 | 3篇 |
信息传播 | 959篇 |
出版年
2023年 | 3篇 |
2022年 | 21篇 |
2021年 | 48篇 |
2020年 | 46篇 |
2019年 | 41篇 |
2018年 | 29篇 |
2017年 | 24篇 |
2016年 | 49篇 |
2015年 | 47篇 |
2014年 | 141篇 |
2013年 | 201篇 |
2012年 | 171篇 |
2011年 | 211篇 |
2010年 | 145篇 |
2009年 | 119篇 |
2008年 | 148篇 |
2007年 | 172篇 |
2006年 | 171篇 |
2005年 | 141篇 |
2004年 | 143篇 |
2003年 | 111篇 |
2002年 | 73篇 |
2001年 | 91篇 |
2000年 | 35篇 |
1999年 | 12篇 |
1998年 | 8篇 |
1997年 | 3篇 |
1996年 | 3篇 |
1995年 | 3篇 |
1994年 | 4篇 |
1993年 | 4篇 |
1992年 | 2篇 |
1988年 | 1篇 |
1957年 | 3篇 |
排序方式: 共有2424条查询结果,搜索用时 0 毫秒
41.
介绍莱姆斯卡特从艰难创立到蓬勃发展再到迎接数字化挑战走过的半个世纪风雨路程,通过介绍该出版社对儿童出版事业的理解和对童书产品卓越品质的追求,为正处于蓬勃发展中的我国儿童图画书出版提供借鉴。 相似文献
42.
[目的/意义]通过探讨多角色馆员协同工作模式下高校图书馆个性化图书荐购系统的构建与完善,为其他高校图书馆建设图书荐购系统、提升读者荐书的积极性提供参考。[方法/过程]以上海交通大学图书馆图书荐购系统建设实践为例,从传统与新型荐书系统对比、协同工作模式分析、系统设计与实现等方面出发,全面解读协同工作模式下的高校图书馆新型图书荐购系统建设实践,并对该图书荐购系统建设的实践进行思考。[结果/结论]上海交通大学图书馆通过多角色馆员协作模式,构建智能化、特色化的图书荐购系统,提高用户荐书的积极性和主动性,促进学科资源与用户需求的契合。开发一个功能丰富、荐书反馈及时的图书荐购系统有助于改善高校图书馆读者荐书的积极性。 相似文献
43.
以 8 0 86/ 80 88汇编语言为例 ,通过两个程序的介绍 ,加以比较、分析 ,指出对汇编语言的理解与应用不能简单只留在指令的字面意义上 ,应清楚指令的实际执行的情况 相似文献
44.
Purpose: The present study aimed to determine if autonomic cardiac modulation was influenced by acute exposure to normobaric hypoxia. Method: Ten healthy male lowland dwellers completed five block-randomised single-blinded, crossed-over acute exposures to a normobaric hypoxic environment, each separated by 24 hours’ recovery (20.3%, 17.4%, 14.5%, 12.0% and 9.8% FIO2). Supine recordings were made of arterial oxygen saturation and electrocardiogram (ECG). RR intervals from the ECG trace were analysed for time (SDNN, lnrMSSD), frequency (lnVLF, lnLF, lnHF, lnTP, LFnu, and HFnu), and nonlinear (DFA-α1 and SampEn) heart rate variability components. Results: A significant reduction in arterial SaO2 occurred with reduced FIO2, along with a rise in heart rate (Cohen’s d?=?1.16, 95% Confidence Interval [2.64–6.46]), significant at 9.8% FIO2. A decrease in autonomic cardiac modulation was also found as shown by a statistically significant (at 9.8% FIO2) decrease in lnTP (d?=?1.84 [1.74–1.94]), and SampEn (d?=?0.98 [0.83–1.12]) and an increase in DFA-α1 (d?=?0.72 [0.60–0.84]) from normoxia at 9.8% FIO2. Conclusion: The decrease in variability indicated a reduction in autonomic cardiac modulation. There appears to be a threshold ~9.8% FIO2 (~6000?m equiv.), below which significant alterations in autonomic control occur. 相似文献
45.
Christopher P. Dwyer 《Irish Educational Studies》2019,38(2):213-217
This review examines Psychology and the Study of Education: Critical Perspectives on Developing Theories, a collection of academic articles edited by Cathal Ó Siochrú. The collection comprehensively considers wide-ranging topics pertinent to the psychology of education, with a target audience of educators and students wishing to learn more about psychology. The review evaluates the collection as an integrated work of entries and analyses each component chapter; recognising the success of the collection with respect to its aim of challenging readers to critically reflect upon and consider the value of psychology in both understanding and influencing education. The book transcends the common formula of academic article collections in this area by being presented in a somewhat conversational manner, making it both interesting and accessible. The book is recommended for anyone interested in the psychology of education and for anyone who values the advancement of learning and teaching. 相似文献
46.
应用推导随机(向量)函数分布的有关知识,给出了均匀总体样本的中位数、样本极差及样本分量乘积的负对数的概率分布。 相似文献
47.
《秋水庵花影集》是晚明散曲大家施绍莘现存可知的唯一的一部作品集,它成书的每一个环节无不浸润着施绍莘的心血。由于施绍莘的精心安排,明刻本《秋水庵花影集》呈现出了独特的面貌。 相似文献
48.
The researchers addressed two questions: (1) Does maternal reading mediation and family home literacy environment (HLE) relate
to children’s emergent literacy (EL) level? and (2) Do the relationships among these variables differ as a function of socioeconomic
strata (SES) level. A total of 94 5–6-year-old children, 47 from low SES (LSES) and 47 from high (HSES) families, and their
mothers participated. Mother–child interactions while reading an unfamiliar book were videotaped and their verbal expressions
were coded for extracting maternal mediation level. Children’s independent EL level was assessed prior to the interaction.
Compared with the LSES group, HSES children showed higher EL levels and their homes had a richer literacy environment. Maternal
mediation level differed by SES: LSES mothers paraphrased text more often; HSES mothers’ higher mediation level included a
discussion of the written system and making connections beyond the text. In the HSES group, maternal mediation level and HLE
related to children’s EL; no such relationships appeared in the LSES group. Results are discussed in terms of children’s socio-economic
background and their reading experiences. Implications for researchers and educational practices about the relationships between
children’s literacy development, SES, HLE, and parental mediation are discussed. 相似文献
49.
近年来,随着互联网的信息安全问题逐渐得到注重,提高计算机的安全防护能力已经成为广大网络用户最关心的问题,而与之相关的可信计算的概念也不断升温,成为信息安全领域的热门话题。本文综述了可信计算的相关概念,包括可信计算平台的基础概念和体系结构。重点介绍了基于可信计算平台的软件栈,详细描述了它的基本原理、体系结构和应用研究。 相似文献
50.
分析了当前国内高职院校应用化工技术专业(民用爆破器材方向)教材存在的缺陷和不足,结合教育改革实践,提出了与企业合作并按照职业岗位能力开发成套教材的解决方法,同时进行了解决方法的可行性分析。 相似文献