全文获取类型
收费全文 | 26317篇 |
免费 | 725篇 |
国内免费 | 5篇 |
专业分类
财政金融 | 3998篇 |
工业经济 | 1688篇 |
计划管理 | 3686篇 |
经济学 | 4907篇 |
综合类 | 227篇 |
运输经济 | 129篇 |
旅游经济 | 318篇 |
贸易经济 | 3227篇 |
农业经济 | 1033篇 |
经济概况 | 3146篇 |
水利工程 | 4605篇 |
邮电经济 | 83篇 |
出版年
2021年 | 181篇 |
2020年 | 250篇 |
2019年 | 374篇 |
2018年 | 487篇 |
2017年 | 537篇 |
2016年 | 548篇 |
2015年 | 355篇 |
2014年 | 559篇 |
2013年 | 2234篇 |
2012年 | 860篇 |
2011年 | 896篇 |
2010年 | 630篇 |
2009年 | 740篇 |
2008年 | 785篇 |
2007年 | 833篇 |
2006年 | 818篇 |
2005年 | 785篇 |
2004年 | 756篇 |
2003年 | 523篇 |
2002年 | 461篇 |
2001年 | 465篇 |
2000年 | 451篇 |
1999年 | 491篇 |
1998年 | 454篇 |
1997年 | 463篇 |
1996年 | 402篇 |
1995年 | 364篇 |
1994年 | 362篇 |
1993年 | 434篇 |
1992年 | 452篇 |
1991年 | 400篇 |
1990年 | 360篇 |
1989年 | 360篇 |
1988年 | 328篇 |
1987年 | 326篇 |
1986年 | 311篇 |
1985年 | 458篇 |
1984年 | 432篇 |
1983年 | 414篇 |
1982年 | 383篇 |
1981年 | 395篇 |
1980年 | 400篇 |
1979年 | 411篇 |
1978年 | 326篇 |
1977年 | 335篇 |
1976年 | 300篇 |
1975年 | 242篇 |
1974年 | 247篇 |
1973年 | 242篇 |
1972年 | 182篇 |
排序方式: 共有10000条查询结果,搜索用时 281 毫秒
51.
Karin M. Ekstrm Marianne P. Ekstrm Marina Potapova Helena Shanahan 《International Journal of Consumer Studies》2003,27(4):294-301
The purpose of this article is to describe how households in Novgorod the Great, Russia, deal with food provision in everyday life. The study focuses on changes experienced in food provision and consumption in Russian society, in order to illustrate how households respond to the transformation towards a market economy. The study reflects women's perspective on food provision. Students from Novgorod the Great visited 105 households and asked the women in the household to answer a questionnaire. Results from the study show that in order to cope with changes in society related to economic reforms, Russian households had changed both their food consumption and food production patterns. There was no big difference between urban and rural households. Nearly all of the households were self‐sufficient in the provision of vegetables and potatoes. Many households had a ‘dacha’ (plot), where they produced most of what they needed. Among the changes experienced during recent years (i.e. during the end of the 1990s), a decade after perestroika was initiated, households mentioned the rise in food prices and the decrease of income. Households reported that they consumed less fruit and/or meat. Some households also mentioned that the quality of nourishment had decreased, thereby indicating lower general quality, lower nutrition value, or less healthy foodstuffs. 相似文献
52.
53.
54.
In this paper we will analyze the relationship between the value and duration moments of a cash flow and movements in the yield curve. We will show that for changes in the yield curve which can be related to tn , the 1st order changes in the net present value of a cash flow are linearly dependent on the n + lth duration moments, and that the 2nd order changes are dependent on the sum of duration moments of order 2 n + 1 and 2 n + 2. We will use this relationship to tilt tracking portfolios so as to protect them against specific changes in the yield curve. 相似文献
55.
Li Yu-cheng He Ming Dept.of Civil Engineering Dalian Univ.of Technology Dalian P.R.China 《水动力学研究与进展(B辑)》1993,(4)
Based on model test,the statistical distribution of extreme values of wave-current in-line forces acting on vertical circular cylinder is analyzed in this paper.It is shownthat the results calculated by the simplified method,proposed by authors,agree well with the testdata;Weibull distribution is also adoptable in the region of high KC number, and the shapeparameter a and scale parameter β are related well with KC number respectively. 相似文献
56.
Li Wang ping Mechanics Department Huazhong University of Science Technology Wuhan P.R.China Yeo K.S. Khoo B.C. Mechanical Production Engineering Department National University of Singapore 《水动力学研究与进展(B辑)》1999,(3)
1. INTRODUCTIONThemaingoalofthispaperistoexplorethepossibilitytolearnmoreaboutthemechanismofturbulentboundarylayerflowinteractionsanditseffectsoncompliantwallperformance.Therearecertainprerequisiteconditionstofurtherthestudyonthemechanism,i.e.theco… 相似文献
57.
The introduction of traffic management schemes has been one response of the National Parks to the problem of ever-increasing car-borne visitors and the consequent damage caused to the rural environment. By reviewing these schemes and by determining and explaining attitudes towards one particular traffic management experiment, the paper aims to deduce lessons for future policy. The analysis, based on two visitor surveys, suggests that the likelihood of success is improved when schemes are integrated, containing both ‘carrot’ and ‘stick’ elements. Since public perceptions are also found to be pivotal to its success, appropriate marketing of a scheme is vital. The paper concludes, however, that to achieve the fundamental objective of greater accessibility with less mobility, a more wide-ranging marketing effort is required intended to engender a sea change in attitude towards both the car and public transport. 相似文献
58.
59.
We evaluate journals based on their relative contributions to top-level finance research in a recent period. Journals are ranked according to the number of citations found in articles published in Journal of Finance, Journal of Financial Economics, Journal of Financial and Quantitative Analysis, and Review of Financial Studies. The analysis controls for both the average number of articles and average number of words published annually in each cited journal. We identify the fifty most frequently cited journals during this period. We also list the fifty most frequently cited authors and articles and note topical trends in the research. 相似文献
60.
The value of a technology strategy has been increasingly discussed by R&D personnel and those involved in product development and business planning efforts. In this issue Albert Rubenstein and Americo Albala elevate this discussion by showing the importance of preparing a firm to compete by stressing the development of important, relevant technologies. Discovery and development must be channeled into areas that will be needed to support business initiatives likely to occur in the future. Albala stresses the importance of this change for the development of economies in nations that have been disappointed by the lack of success of importing technologies from more developed nations, while Rubenstein maintains that the pace of marketplace change requires a technology strategy in order to reduce the misapplication of scarce resources within the firm and the possibility of being blindsided by competitive developments. These essays continue a year-long series of contributions that the editor-in-chief solicited from members of the editorial board. Members were asked to reflect upon changes and opportunities that they see influencing our profession during the coming decade. Both of these short essays are designed to introduce new perspectives. It is not essential that you agree with the recommendations, but we hope that you are stimulated as you reflect on the issues they raise. 相似文献