全文获取类型
收费全文 | 3048篇 |
免费 | 28篇 |
国内免费 | 1篇 |
专业分类
教育 | 2080篇 |
科学研究 | 369篇 |
各国文化 | 32篇 |
体育 | 263篇 |
综合类 | 1篇 |
文化理论 | 31篇 |
信息传播 | 301篇 |
出版年
2022年 | 20篇 |
2021年 | 37篇 |
2020年 | 50篇 |
2019年 | 116篇 |
2018年 | 176篇 |
2017年 | 130篇 |
2016年 | 130篇 |
2015年 | 67篇 |
2014年 | 97篇 |
2013年 | 635篇 |
2012年 | 59篇 |
2011年 | 63篇 |
2010年 | 67篇 |
2009年 | 55篇 |
2008年 | 64篇 |
2007年 | 70篇 |
2006年 | 50篇 |
2005年 | 42篇 |
2004年 | 39篇 |
2003年 | 34篇 |
2002年 | 29篇 |
2001年 | 29篇 |
2000年 | 30篇 |
1999年 | 33篇 |
1998年 | 30篇 |
1997年 | 19篇 |
1996年 | 23篇 |
1995年 | 20篇 |
1994年 | 22篇 |
1993年 | 21篇 |
1992年 | 31篇 |
1991年 | 33篇 |
1990年 | 29篇 |
1989年 | 34篇 |
1988年 | 26篇 |
1987年 | 23篇 |
1986年 | 27篇 |
1985年 | 28篇 |
1984年 | 32篇 |
1983年 | 19篇 |
1982年 | 28篇 |
1980年 | 19篇 |
1979年 | 22篇 |
1977年 | 19篇 |
1976年 | 21篇 |
1967年 | 17篇 |
1941年 | 19篇 |
1939年 | 23篇 |
1937年 | 41篇 |
1936年 | 40篇 |
排序方式: 共有3077条查询结果,搜索用时 15 毫秒
11.
Kwafo-akoto KO 《Aslib proceedings》1988,40(4):105-110
Acquiring both published and unpublished documents produced in Africa is, generally, a difficult task due to the existing poor state of bibliographic control and the publishing industry. It is even more difficult to obtain unpublished documents in a specialized area of study such as demography--a diffuse area which cuts across several disciplines. This paper discusses the problems encountered on acquisition trips to some African countries to acquire unpublished population material. To help solve the problems, the Population Association of Africa must persuade its members to send copies of their publications to population libraries and documentation centers in their individual countries for dissemination to the other users in Africa. The various organizations and institutions in Africa engaged in the teaching and research of population studies should have an agreement to exchange copies of their theses. The Economic Commission for Africa (ECA) and the Organization of African Unity (OAU) should make representations to the various African member countries on the need to disseminate the results of vital censuses and surveys conducted. Finally, the Population Information Network for Africa (POPIN-AFRICA) with its coordinating unit at the population division of ECA should ensure that all the nodes of the network have the financial and other resources to be able to acquire the relevant documents needed for their operations. 相似文献
12.
13.
Joel O. Iverson - Joel O. Iverson is currently an assistant professor in the 《Journal of Applied Communication Research》2008,36(2):176-199
Knowing is an enacted, communicated process that is difficult to observe, let alone manage, in organizations. Communities of practice (CoPs) offer a productive solution for improving knowledge and knowledge management, but the communicative processes that enact CoPs have not been explored, leaving CoPs as an organizational black box. This research extends CoP theory as a means to determine the presence of a CoP and distinguish between various CoPs, and as a practical means to evaluate the communicative processes of organizational knowledge. CoPs enact the communicative nature of knowing through the elements of mutual engagement, negotiation of a joint enterprise, and shared repertoire. Specifically, two groups of volunteers are examined through a combination of participation, observation, and interviews in order to explore CoP theory as a dynamic system for examining and evaluating organizational knowledge. 相似文献
14.
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
15.
N. Yu. Berezkina O. N. Sikorskaya 《Scientific and Technical Information Processing》2008,35(6):256-259
The publication activity of Russian and Belarussian scientists, the degree of reflection of their papers in Scopus databases, and the data on the citation of Belarussian authors in the works of other researchers are discussed. 相似文献
16.
17.
O. P. Morozova 《Scientific and Technical Information Processing》2008,35(3):153-154
The web coverage of the research activities of the VINITI RAS is considered. The practicability of using various information retrieval systems for obtaining information relevant to the Institute’s functioning and results is analyzed. 相似文献
18.
19.
Louise H. Kidder 《Int J Intercult Relat》1977,1(1):48-60
Field work and structured interviews with 139 foreign sojourners in India were analyzed to describe the socialization of aliens into their role. Attitude scales measuring favorability toward the host country and people were also examined in relation to the respondent's occupational status and elapsed time in India. The results from the field work and interviews suggest that the privileges and high status accorded many Western visitors may contribute to the visitors' derogation of their hosts, a process which is often subtle but unmistakable. The visitors appear to become socialized into the world of aliens rather than the world of their hosts. The higher the visitor's status and the longer the elapsed time in India, the more pronounced these patterns appear. While the correlational nature of the study makes it impossible to determine whether persons with initially unfavorable attitudes are selected into the high status positions or whether the positions themselves create such attitudes, it appears reasonable to conclude that there would be less derogation and alienation if the lures of status and money were removed; persons would be neither selected nor influenced by such factors. 相似文献
20.