全文获取类型
| 收费全文 | 23386篇 |
| 免费 | 312篇 |
| 国内免费 | 21篇 |
专业分类
| 教育 | 15597篇 |
| 科学研究 | 3630篇 |
| 各国文化 | 199篇 |
| 体育 | 1735篇 |
| 综合类 | 21篇 |
| 文化理论 | 235篇 |
| 信息传播 | 2302篇 |
出版年
| 2021年 | 232篇 |
| 2020年 | 336篇 |
| 2019年 | 486篇 |
| 2018年 | 656篇 |
| 2017年 | 668篇 |
| 2016年 | 584篇 |
| 2015年 | 404篇 |
| 2014年 | 553篇 |
| 2013年 | 4085篇 |
| 2012年 | 541篇 |
| 2011年 | 499篇 |
| 2010年 | 457篇 |
| 2009年 | 424篇 |
| 2008年 | 449篇 |
| 2007年 | 473篇 |
| 2006年 | 406篇 |
| 2005年 | 378篇 |
| 2004年 | 391篇 |
| 2003年 | 358篇 |
| 2002年 | 367篇 |
| 2001年 | 466篇 |
| 2000年 | 504篇 |
| 1999年 | 398篇 |
| 1998年 | 217篇 |
| 1997年 | 267篇 |
| 1996年 | 274篇 |
| 1995年 | 184篇 |
| 1994年 | 208篇 |
| 1993年 | 199篇 |
| 1992年 | 299篇 |
| 1991年 | 294篇 |
| 1990年 | 319篇 |
| 1989年 | 334篇 |
| 1988年 | 278篇 |
| 1987年 | 278篇 |
| 1986年 | 299篇 |
| 1985年 | 321篇 |
| 1984年 | 259篇 |
| 1983年 | 227篇 |
| 1982年 | 218篇 |
| 1981年 | 175篇 |
| 1980年 | 169篇 |
| 1979年 | 272篇 |
| 1978年 | 210篇 |
| 1977年 | 192篇 |
| 1976年 | 166篇 |
| 1975年 | 153篇 |
| 1974年 | 171篇 |
| 1973年 | 156篇 |
| 1971年 | 156篇 |
排序方式： 共有10000条查询结果，搜索用时 281 毫秒
101.
102.
103.
Tseng SC Arcand JL Brugger JM Finn M Olson AJ Somers S 《Library resources & technical services》1990,34(2):139-157
Serials, one of the more complicated areas of library technical endeavors, has lacked the benefit of standards for a long time. Even now, with standards beginning to be available, the majority of institutions are not working within standard serials formats. A survey to determine the use of serials standards in libraries was conducted in 1988 by the American Library Association, Resources and Technical Services Division, Serials Section, Committee to Study Serials Standards. In the spring of 1988 a survey was sent to a group encompassing the Association of Research Libraries members, CONSER participants, United States Newspaper Program participants, Microform Project libraries, and some vendors and librarians who attended the Committee meetings on a regular basis. The survey questionnaire assessed the current level of serials standards awareness of librarians and vendors. Topics included the type of serials systems used, standards relevant to serials control and union listing and whether or not they are implemented, types and levels of training staff received in the application of standards, benefits of the standards, and areas where standards are most needed. 相似文献
104.
105.
106.
107.
108.
109.
V. A. Frolova S. K. Khasenova T. Sh. Kubieva O. A. Rog 《Scientific and Technical Information Processing》2008,35(2):104-106
This paper discusses the evaluation of scientific activity with the help of some scientometric indices, in particular, a citation index. The information massif of the bibliographic database of citations to domestic publications of Kazakh authors is statistically described. 相似文献
110.
A. V. Suvorinov A. V. Anyutin V. S. Sokolovskaya V. I. Fedorov 《Scientific and Technical Information Processing》2008,35(2):63-67
We consider some issues of the development of the national information infrastructure in the field of innovation, including a national system of accounting for the results of scientific and technical activities (RSTA) and a national new-generation research computer network (NNGRCN). The current state of the national system of scientific and technical information and its resources for information support of innovation processes are analyzed. In the context of further development of the Commonwealth of Independent States (CIS), we propose a Conception of scientific and technical support for programs and projects of NIS member-states in the field of innovation, making it possible to incorporate the existing innovation-oriented information resources into a joint distributed integrated information system as well as to create new information resources and technologies. 相似文献