全文获取类型
收费全文 | 23109篇 |
免费 | 635篇 |
国内免费 | 746篇 |
专业分类
教育 | 16237篇 |
科学研究 | 3598篇 |
各国文化 | 126篇 |
体育 | 1442篇 |
综合类 | 1633篇 |
文化理论 | 32篇 |
信息传播 | 1422篇 |
出版年
2024年 | 13篇 |
2023年 | 122篇 |
2022年 | 228篇 |
2021年 | 457篇 |
2020年 | 602篇 |
2019年 | 516篇 |
2018年 | 428篇 |
2017年 | 445篇 |
2016年 | 523篇 |
2015年 | 700篇 |
2014年 | 1047篇 |
2013年 | 1537篇 |
2012年 | 1750篇 |
2011年 | 1745篇 |
2010年 | 1133篇 |
2009年 | 1192篇 |
2008年 | 1539篇 |
2007年 | 1762篇 |
2006年 | 1878篇 |
2005年 | 1633篇 |
2004年 | 1365篇 |
2003年 | 1031篇 |
2002年 | 797篇 |
2001年 | 613篇 |
2000年 | 428篇 |
1999年 | 250篇 |
1998年 | 139篇 |
1997年 | 128篇 |
1996年 | 114篇 |
1995年 | 67篇 |
1994年 | 66篇 |
1993年 | 67篇 |
1992年 | 61篇 |
1991年 | 33篇 |
1990年 | 26篇 |
1989年 | 27篇 |
1988年 | 6篇 |
1987年 | 7篇 |
1985年 | 6篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1980年 | 1篇 |
1979年 | 2篇 |
1976年 | 1篇 |
1957年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
131.
David Andrich 《Educational Measurement》2016,35(4):25-30
Since Cronbach's (1951) elaboration of α from its introduction by Guttman (1945), this coefficient has become ubiquitous in characterizing assessment instruments in education, psychology, and other social sciences. Also ubiquitous are caveats on the calculation and interpretation of this coefficient. This article summarizes a recent contribution (Andrich, 2015) on the use of coefficient α which complements these many caveats. It shows that in the presence of a simple bifactor structure of a scale where unique components of variance are homogeneous in magnitude, three components of variance and the common latent common correlation among the subscales can be calculated from the ratio of two calculations of α, one at the level of the items, the other at the level of the subscales. It was suggested that these two ready calculations and their interpretation, and the reporting of all four indices in the analysis of scales with a subscale structure, would reduce the misinterpretation of this coefficient. An illustrative example of the application of the calculations is also shown. 相似文献
132.
Kosal Sam 《International journal of qualitative studies in education》2013,26(6):714-729
Educational institutions, like most social service organizations, need to recognize intersectionality and complexity and move away from monolithic conceptions of homelessness – if they recognize homelessness at all. This first person account of a gay, Cambodian refugee illustrates the enormous complexity schools face in forming institutional responses for the needs of homeless, highly mobile, and economically displaced children and youth. This article demonstrates an effort to avoid reductionist definitions of homelessness and to include experiential representations of humans living at the margins (under the 5th Avenues of the world, in central parks, in downtown shelters, outside of the ethical and systemic “home” of current ideologies and social orders, under the politics of HIV in Africa, as refugees and as those “othered” by dominant social narratives). The research takes place in the context of the At Home At School program at Washington State University. 相似文献
133.
面对IMO越来越严格的排放标准,对游轮或者游艇动力改进进行探讨,采用清洁能源LNG,改进机舱布置和喷射系统,加强安全设施。同时,也对采用游轮或是游艇LNG作为动力提出了一些建议。 相似文献
134.
李绍丽 《洛阳师范学院学报》2006,25(5):149-152
随着国内电力市场化改革的逐步深入,知识型员工作为掌握专业技术知识的人才,日益成为企业间争夺的对象.本文探讨了知识型员工的特点,并由此入手分析了知识型员工流失的原因,提出了一套变管理为服务的制度以及防范该类员工流失可能对企业造成损失的措施. 相似文献
135.
《信阳师范学院学报(哲学社会科学版)》2016,(1):14-18
国家治理的本质是通过权力配置各种资源实现国家善治的政治实践活动。权力道德不仅是狭义上的官德,而且在广义上更是探索权力的道德制约机制、寻求权力的道德合理性、实现权力的善与文明的政治伦理范畴。国家治理与权力道德之间存在着密切的互动关系,国家治理是权力道德的社会实践场域;同时,权力道德是国家治理的价值表征与基础支撑,是国家治理的主体性依据。国家治理与权力道德之间的互动关系,昭示着在推进国家治理现代化过程中应坚持善治理念,推进廉政治理,注重权力公共精神的培育,以实现国家治理的善治构想。 相似文献
136.
Dong-mao Wen 《Frontiers of Education in China》2006,1(3):426-438
Based on a nation-wide survey of higher education graduates, this paper analyzes the impact of family background, using paternal
occupation and education as indicators, on their scores in the National College Entrance Examination, the level and type of
higher education institutions they attend, their employment after graduation, and the income they receive from their first
job. It has been found that there are wide disparities among students with different family backgrounds in both access to
higher education and their potential employment in China nowadays. This paper also studies how those influences happen.
__________
Translated from Peking University Education Review, 2005 July (3) 相似文献
137.
Classificationofaircleanlinessinanykindofclean roomsandcleanzoneswillbeaccomplishedintermsofconcentrationofairborneparticles .Alightdiscreteair borneparticlecounter (hereafterreferringtoasAPC)isusedtodeterminetheconcentrationofairborneparticlesequaltoandlargerthanthespecifiedsizesatdesignatedsamplinglocation[1,2 ] .Inthepracticalmeasurementofparticleconcentrationincleanrooms,itisfoundthetest ingresultsofparticlenumberinthesameareacountedbydifferentparticlecountersarequitedifferentanduptoanord… 相似文献
138.
孙天川 《湖州师范学院学报》2006,28(1):50-53
利用定向图的邻接矩阵的特性,得到了定向图的邻接谱的谱半径的一个可达上界.设D为n阶的定向图,则其邻接谱的谱半径ρ(D)≤n2-1.当n为奇数时,上式取得等号当且仅当D为n2-1出度正则(入度正则);当n为偶数时,不等式严格成立. 相似文献
139.
戴聪 《青岛大学师范学院学报》1997,(2)
本文利用平稳过程反正弦定理估计了信号的相关西数和话密度,实例计算表明本文所述方法与实测结果相当一致。 相似文献
140.
J Heyrovsky’s invention of polarography in which a dropping mercury electrode is used in the electrochemical cell revolutionised
electroanalysis, study of electrode kinetics and adsorption studies on mercury electrodes. Polarography has also directly
contributed to the development of new and innovative ideas in electrochemical techniques, instrumentation and applications 相似文献