全文获取类型
收费全文 | 21116篇 |
免费 | 89篇 |
专业分类
财政金融 | 3565篇 |
工业经济 | 1126篇 |
计划管理 | 3261篇 |
经济学 | 4779篇 |
综合类 | 559篇 |
运输经济 | 40篇 |
旅游经济 | 76篇 |
贸易经济 | 5235篇 |
农业经济 | 210篇 |
经济概况 | 1738篇 |
信息产业经济 | 44篇 |
邮电经济 | 572篇 |
出版年
2020年 | 39篇 |
2019年 | 74篇 |
2018年 | 2356篇 |
2017年 | 2114篇 |
2016年 | 1259篇 |
2015年 | 140篇 |
2014年 | 185篇 |
2013年 | 662篇 |
2012年 | 555篇 |
2011年 | 2030篇 |
2010年 | 1906篇 |
2009年 | 1625篇 |
2008年 | 1623篇 |
2007年 | 1974篇 |
2006年 | 185篇 |
2005年 | 496篇 |
2004年 | 556篇 |
2003年 | 654篇 |
2002年 | 365篇 |
2001年 | 160篇 |
2000年 | 149篇 |
1999年 | 100篇 |
1998年 | 110篇 |
1997年 | 82篇 |
1996年 | 87篇 |
1995年 | 69篇 |
1994年 | 77篇 |
1993年 | 57篇 |
1992年 | 83篇 |
1991年 | 70篇 |
1990年 | 68篇 |
1989年 | 67篇 |
1988年 | 50篇 |
1987年 | 58篇 |
1986年 | 68篇 |
1985年 | 97篇 |
1984年 | 78篇 |
1983年 | 79篇 |
1982年 | 98篇 |
1981年 | 79篇 |
1980年 | 74篇 |
1979年 | 67篇 |
1978年 | 78篇 |
1977年 | 65篇 |
1976年 | 59篇 |
1975年 | 50篇 |
1974年 | 44篇 |
1973年 | 37篇 |
1972年 | 17篇 |
1971年 | 22篇 |
排序方式: 共有10000条查询结果,搜索用时 234 毫秒
51.
Eric F. Parkinson 《International Journal of Technology and Design Education》2004,14(3):219-243
Construction kits have played a significant part in nurturing the growth and development of the minds and manipulation-based
skills of children (and adults) in formal and non-formal education settings. These kits have origins rooted in the representation
of the built world and now have a diversity of form and function, including technical versions with moving parts. This article
examines some of the historically based ideas that lie behind the role that kits may have in terms of physical modelling.
The article traces the transformation of kits from simple bricks and blocks into more complicated pieces for space-filling
and achieving the transfer of forces and motion. This transformation occurred during the Victorian era when the influence
of the ideas of educationalists and, perhaps rather strangely, exponents of early aviation, played major roles in determining
the diversity of forms of construction kit and modelled possibilities that are now to be seen in classrooms and homes. The
article ends with a review of some of the lessons from the past and present that will need to be considered in relation to
concrete modelling in schools for the future.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
52.
53.
Using the agency and institutional perspectives, this study advances several hypotheses about the board structure–firm performance relationship within Russia. We tested these hypotheses using survey data. Despite a relatively small sample size, predictions from both theoretical perspectives were supported. Specifically, we found a negative relationship between “informal” CEO duality and firm performance. This finding is noteworthy given the 1996 Russian Federal law which prohibits the CEO from also serving as board chair. Also, we found that the more vigorously the firm pursues a retrenchment strategy, the more negative the relationship between proportion of inside directors and firm performance. Overall, these findings suggest that effective corporate governance may be essential to firm performance in Russia. 相似文献
54.
Calvyn Potgieter 《International Journal of Technology and Design Education》2004,14(3):205-218
In this article the impact of technology education, as a new learning area (subject) in the curriculum, on in-service teacher
education in South Africa is described in order to ascertain the extent of the impact. The research on which this article
is based draws on a variety of experiences and observations in the field at grassroots level (in particular an outreach project
in rural communities). The envisaged impact of technology education on South African schools, communities, teacher educators
and teachers, the range of in-service teacher education that is required, and the impacts in urban and rural areas are discussed.
Finally a number of concluding remarks are made about the extent of the impact of the inclusion of technology education in
the new National Curriculum Statement and whether the situation has changed since the implementation of a pilot technology
education project in 1998.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
55.
Rudy K. Moenaert Dirk Deschoolmeester Arnoud De Meyer William E. Souder 《R&D Management》1992,22(1):021-040
Abstract The research question in the present article can be phrased in the following way: what are the elements which influence the perception of the utility of information received from another function? A field study research has been conducted in 40 Belgian companies. In each company, we have studied two on-going innovation projects (one planning project, one development project). Crossfunctional communication behaviours at the R&D/marketing interface have been measured by means of mailed structured questionnaires. Three-hundred and eighty-six questionnaires have been returned. The data analyses show that there are four underlying information dimensions, i.e. the perceived relevance, the perceived comprehensibility, the perceived novelty and the perceived credibility of information. We also discuss some contingency variables (function of the message receiver, stage in the innovation process) that might moderate the impact of these dimensions. It will be shown that the interaction between source and receiver has a significant impact on the perceived credibility, the perceived comprehensibility and the perceived novelty of the received information. 相似文献
56.
57.
58.
A bstract . These comments focus on some issues raised in the papers by Dimand, Peart and Levy, Cot, and Leonard. These papers are fascinating, but not without weaknesses. It is argued that Dimand's presentation of what he calls the "general principle" of classical economics is misconceived. There is a confusion in this paper between the classical view of equal capacity and the much newer concept of equally rational actual performance. Peart and Levy discuss the idea of unequal capacity for pleasure in Edgeworth, but do not draw a link back to the idea in J. S. Mill of different qualities of pleasure. Cot and Leonard provide informative accounts of the American eugenic movement and its links to progressivism, but with an insufficient degree of distinction between the various positions and agendas that were concerned. 相似文献
59.
Stephanie Stray 《Quality and Quantity》2009,43(1):161-171
That survey research is error prone is not a new idea and different varieties of non-sampling error have been investigated
in the literature as well as consideration being given in many statistics textbooks to the issue of sampling error. The paper
here considers research upon corporate environmental reporting. It compares information provided by corporate environmental
reports with information that survey respondents claim their organization’s environmental report contains. This enables the
accuracy of the claims to be assessed. Consideration is given to two different industries the Water industry and the Energy
industry. Errors due to inaccurate reporting by survey respondents are shown to be relatively infrequent and respondents appear
just about as likely to claim they report information that they do not, in fact, report as to fail to indicate that they report
information that is, in fact, actually reported. 相似文献
60.
This paper first examines the rapid growth and changing composition of manufactured exports in Indonesia and Thailand, highlighting the rapid growth of office and computer machinery and electric machinery, somewhat slower growth of non-electric and transportation machinery, as well as the low growth of previously large exports of textiles apparel. Second, the important contributions of foreign multinational enterprises (MNEs) to export growth in the machinery industries, particularly in electric, office, and computing machinery, are documented. Third, the paper describes trade policies in all these industries in some detail, emphasizing how low protection was a key facilitator of rapid export growth in the MNEs that dominated the electric, office, and computing machinery industry, while high protection reduced incentives to export among MNEs in the transportation machinery industry. 相似文献