全文获取类型
收费全文 | 16745篇 |
免费 | 100篇 |
国内免费 | 109篇 |
专业分类
教育 | 11867篇 |
科学研究 | 2365篇 |
各国文化 | 25篇 |
体育 | 640篇 |
综合类 | 255篇 |
文化理论 | 405篇 |
信息传播 | 1397篇 |
出版年
2023年 | 3篇 |
2022年 | 45篇 |
2021年 | 191篇 |
2020年 | 106篇 |
2019年 | 57篇 |
2018年 | 2221篇 |
2017年 | 2127篇 |
2016年 | 1622篇 |
2015年 | 313篇 |
2014年 | 377篇 |
2013年 | 423篇 |
2012年 | 598篇 |
2011年 | 1160篇 |
2010年 | 1234篇 |
2009年 | 824篇 |
2008年 | 965篇 |
2007年 | 1521篇 |
2006年 | 443篇 |
2005年 | 676篇 |
2004年 | 636篇 |
2003年 | 527篇 |
2002年 | 285篇 |
2001年 | 139篇 |
2000年 | 99篇 |
1999年 | 64篇 |
1998年 | 53篇 |
1997年 | 61篇 |
1996年 | 36篇 |
1995年 | 37篇 |
1994年 | 28篇 |
1993年 | 14篇 |
1992年 | 14篇 |
1991年 | 10篇 |
1990年 | 9篇 |
1989年 | 11篇 |
1988年 | 3篇 |
1987年 | 1篇 |
1986年 | 3篇 |
1985年 | 2篇 |
1984年 | 5篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1980年 | 2篇 |
1979年 | 2篇 |
1976年 | 1篇 |
1973年 | 3篇 |
1957年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
71.
72.
本文从理论与实践方面,评介了《电子政务信息资源管理》的若干特点。 相似文献
73.
近日,“书生数字图书馆系统”顺利通过北京市科学技术委员会组织的国家科技部创新基金项目验收评审会的验收,得到专家组的一致肯定和好评。书生公司的核心技术实力及在数字图书馆领域的成功应用得到认可。专家组首先听取了项目承担单位北京书生公司的《总结报告》以及利安达信隆会计师事务所有限责任公司的《专项审计报告》。随后观看了项目产品演示,并检查了合同执行情况。经研究得出结论认为,该项目资料齐全、规范,项目投资结构、用款计划及各项经济指标清楚、合理,比较出色地完成了合同规定指标。同时,经过北京市信息产品质量检查站及用… 相似文献
74.
75.
Question classification systems play an important role in question answering systems and can be used in a wide range of other domains. The goal of question classification is to accurately assign labels to questions based on expected answer type. Most approaches in the past have relied on matching questions against hand-crafted rules. However, rules require laborious effort to create and often suffer from being too specific. Statistical question classification methods overcome these issues by employing machine learning techniques. We empirically show that a statistical approach is robust and achieves good performance on three diverse data sets with little or no hand tuning. Furthermore, we examine the role different syntactic and semantic features have on performance. We find that semantic features tend to increase performance more than purely syntactic features. Finally, we analyze common causes of misclassification error and provide insight into ways they may be overcome. 相似文献
76.
提出一种一阶扩展A型Cooper变换改进型模式,用结构归纳法证明了其正确性,并给出应用示例。 相似文献
77.
There are three models for community archives in China. The first one is where community archives are kept in government-funded/government-established museums or archives. The second is where community archives are kept by scholarly organizations such as universities. The third involves the community establishing its own archive. This last model is very unusual in China. The PiCun Culture and Art Museum of Migrant Labor (PCMML) provides an example of this model as it is the only independent community archives focusing on migrant workers in China. This paper explores the emergence and development of PCMML, its impact on community members and challenges faced including funding and staffing, but also those unique to China—PCMML is greatly influenced by a range of national and local government policies and regulations. Conclusions are that survival strategies for independent community archives in China are dependent on three dimensions: the community itself, society and the government. Cultural consciousness of the community is the premise for the establishment and sustainability of independent community archives, and independent community archives can be the public space to cultivate cultural consciousness of community members and thus activates community members’ agency to document, preserve and disseminate their own history. At the same time, independent community archives also need to engage with broader society to avoid involution and gain support and understanding. Independent community archives are constrained by government policies and regulations, so it is essential for them to develop strategic relationships with government. 相似文献
78.
Textbook vetting and evaluation process intends to ensure that the materials provided are relevant, of the required quality, suitable ad would enhance learning efficiency and effectiveness. The paper investigates the role of publishers and Tanzania Institute of Education (TIE) in the textbooks vetting and evaluation process; examines factors used to vet, evaluate and approve primary and secondary school textbooks in Tanzania and proposes Strategies that would enhance the textbook vetting, evaluation and process. The study used a mixed method research design. Respondents were selected educational publishers; MoEVT, Baraza la Kiswahili Tanzania, TIE, and Publishers Association of Tanzania. Questionnaire and semi- structured interview were used to collect data which were analysed qualitatively and quantitatively. Major findings of the study were; textbooks vetting and evaluation process is not professionally conducted although standard criteria have been established; there is not well established roles among key players involved in the vetting and evaluation process leading to conflict of interest between TIE and the publishers. The study recommends establishing an independent professional evaluation board and a well-defined timetable and effective communication among various players; enacting a book policy and adopting a limited multiple-textbook publishing system. 相似文献
79.
80.
Albert Martin Susanne Bartscher-Finzer Anne Richards 《Publishing Research Quarterly》2018,34(1):69-88
Our study compares the motivations of Australian and German book publishers. The results demonstrate remarkable similarities, but also a significant difference regarding the effects of the publishers’ self-concept. In the German case the publishers with a dominant economic orientation are more proactive than the publishers with a dominant cultural orientation. In the Australian case, this correlation does not exist. The same difference holds for the relationship between the economic orientation and extrinsic motivation. We discuss these results and examine empirical evidence and theoretical suggestions to explain the differing findings. The data stem from surveys conducted in the two countries with responses of 196 (Germany) and 54 publishers (Australia). 相似文献