全文获取类型
收费全文 | 3410篇 |
免费 | 249篇 |
国内免费 | 1篇 |
专业分类
财政金融 | 66篇 |
工业经济 | 66篇 |
计划管理 | 359篇 |
经济学 | 510篇 |
综合类 | 203篇 |
运输经济 | 47篇 |
旅游经济 | 65篇 |
贸易经济 | 187篇 |
农业经济 | 1974篇 |
经济概况 | 183篇 |
出版年
2025年 | 19篇 |
2024年 | 61篇 |
2023年 | 75篇 |
2022年 | 73篇 |
2021年 | 87篇 |
2020年 | 219篇 |
2019年 | 94篇 |
2018年 | 106篇 |
2017年 | 183篇 |
2016年 | 166篇 |
2015年 | 120篇 |
2014年 | 202篇 |
2013年 | 259篇 |
2012年 | 225篇 |
2011年 | 284篇 |
2010年 | 229篇 |
2009年 | 204篇 |
2008年 | 153篇 |
2007年 | 199篇 |
2006年 | 183篇 |
2005年 | 141篇 |
2004年 | 103篇 |
2003年 | 85篇 |
2002年 | 56篇 |
2001年 | 33篇 |
2000年 | 27篇 |
1999年 | 18篇 |
1998年 | 10篇 |
1997年 | 10篇 |
1996年 | 3篇 |
1995年 | 3篇 |
1994年 | 4篇 |
1993年 | 2篇 |
1992年 | 3篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1988年 | 1篇 |
1986年 | 1篇 |
1985年 | 8篇 |
1984年 | 6篇 |
1982年 | 1篇 |
1981年 | 1篇 |
排序方式: 共有3660条查询结果,搜索用时 15 毫秒
51.
《国际农业可持续发展杂志》2013,11(1):212-221
An international multi-disciplinary team of scientists, led by the International Livestock Research Institute (ILRI), tackled the problem of bovine trypanosomosis and the development of drug resistance in West Africa, inter alia, by the promotion of rational drug use (RDU) principles. These principles had been brought to farmers by practical training and by the provision of information leaflets. This study aimed to evaluate the impact of RDU training at smallholder level with respect to advances in farmers' knowledge and farm productivity before research outputs could be scaled up. Therefore, 508 cattle farmers attended a disease-specific knowledge test and provided information about farm production. Results show that farmers who participated in the training are more likely to identify signs and causes of the disease and to correctly administer drugs. Allocating scores to each question in the knowledge tests and scrutinizing the differences between trained and untrained farmers by matching procedures shows that participating farmers reach higher scores in all knowledge categories. Moreover, the acquisition of additional knowledge and the application of improved control strategies significantly increase farm performance. Additionally, an allocative effect was identified since trypanocide expenditures were saved by less expensive inputs. 相似文献
52.
Jill Wigle 《International journal of urban and regional research》2014,38(2):573-589
This article details the evolving social and spatial dynamics of a planning approach that is now being used to regulate irregular or informal settlements in the conservation zone of Xochimilco in the Federal District of Mexico City. As part of the elaboration of ‘normative’ planning policies and practices, this approach counts, maps and then classifies irregular settlements into different categories with distinct land‐use regularization possibilities. These spatial calculations establish a continuum of ‘gray’ spaces, placing many settlements in a kind of planning limbo on so‐called ‘green’ conservation land. The research suggests that these spatial calculations are now an important part of enacting land‐use planning and presenting a useful ‘technical’ veneer through which the state negotiates competing claims to space. Based on a case study of an irregular settlement, the article examines how the state is implicated in the production and regulation of irregularity as part of a larger strategy of spatial governance. The research explores how planning ‘knowledges’ and ‘techniques’ help to create fragmented but ‘governable’ spaces that force communities to compete for land‐use regularization. The analysis raises questions about the conception of informality as something that, among other things, simply takes place outside of the formal planning system. 相似文献
53.
国际上土地利用/土地覆盖变化研究的新进展 总被引:175,自引:1,他引:175
进入90年代以来,随着全球人口,资源与环境问题的日益突出,土地利用/土地覆盖变化(LUCC)研究已成为国际上全球变化研究的前沿与热点课题,在研究内容与方法上出现了很多新的趋势,本文将对目前国际上土地利用与土地覆盖变化研究的新进展进行介绍,以为我国开展此方面的研究提供参考。 相似文献
54.
国外与我国台湾地区土地用途管制制度问题启示 总被引:1,自引:0,他引:1
采用文献资料法和比较分析法,在简单介绍加拿大、美国、日本和我国台湾地区土地用途管制的基础上,从资源禀赋、管制体系或内容以及实施方式上进行比较,归纳出其共性,从而为我国羽翼未满的土地用途管制提供一定的启示:我国在完善土地用途管制制度时,应当重视土地用途分区、土地利用规划,明确土地管理权限和健全相关法律体系。 相似文献
55.
ABSTRACT A study was undertaken to examine cultural orientations, attitudes toward advertising, and media use patterns across China, Taiwan, and the United States. China and Taiwan share similar cultural backgrounds, yet their economies and advertising industries have evolved quite differently due to different social and political settings. The United States was included to provide a point of comparison. Understanding media patterns, cultural orientations, and attitudes can help better ascertain the potential for using standardized strategies by international advertisers across different markets. Industry and consumer trends in evolving markets can also be monitored. Consumers in China and Taiwan were found to be more similar than different. For example, consumers in both markets were less individualistic and more collectivistic than their counterparts in the U.S. They also exhibited more favorable attitudes toward advertising than American consumers. Furthermore, Chinese and Taiwanese respondents spent significantly more time with print media than American respondents. Implications of the findings for balancing standardization and localization decisions are discussed. 相似文献
56.
集体建设用地使用权流转的博弈行为分析 总被引:8,自引:0,他引:8
大量研究表明,尽管国家在政策和法律上采取诸多限制,集体建设用地使用权或明或暗的流转仍然大量发生.从流转主体间的利益博弈过程分析入手,论证集体建设用地使用权流转的客观必然性,为国家逐步放开限制和规范流转提供理论参考.通过重点构建集体建设用地使用权流转的利益博弈模型,求解表明:集体建设用地使用权流转是转出者、转入者和地方政府三方重复利益博弈的必然结果,因为无论何种条件下,流转都将有助干增加流转各方的预期收益.面对流转的大势,变堵为疏,采取有效措施规范和促进集体建设用地使用权的合理有序流转,避免土地收益流失和市场混乱等问题,是未来我国土地管理制度改革的一项重要内容. 相似文献
57.
国际金融危机背景下我国利用外资的思考 总被引:3,自引:0,他引:3
周江银 《福建金融管理干部学院学报》2009,(6):25-29
2008年10月以来,我国吸收外商直接投资数已连续9个月呈下降趋势,形势比较严峻。尽管我国经济率先复苏的信号渐趋明朗,国际资金流出现回稳态势,预计未来FDI降幅会继续收窄。但我们面临的内外部环境仍存在较大不确定性。我国应及时调整政策,采取有效措施:统一外资立法,健全外资并购的法律制度;增强FDI对中国市场环境的信心,改善投资软环境;优化外商投资产业结构;加大服务业招商引资力度,创造良性发展的服务业引资环境等。这样,才可能化“危”为“机”,继续发挥外资在我国经济中的积极作用。 相似文献
58.
59.
Abstract Raising children takes both time and money. Scholars have sought convincing ways to capture the costs of children, but even when these estimates include indirect costs, such as mothers' foregone earnings, they fall short of the true time costs involved. This paper uses data from the 1997 Australian Bureau of Statistics (ABS) Time Use Survey to study how the allocation of time differs across households with varying numbers and ages of children and how households with children differ from those without children. It also examines the intra household division of time resources, showing how childcare, related unpaid work, and the total market and non-market workloads compare for a couple in the same household. It includes secondary activity in an analysis of total parental time commitments to give a more accurate picture of the time cost of children than is possible on the basis of analyzing “primary” activities alone. 相似文献
60.
张金前 《国土与自然资源研究》2016,(4):1-5
以晋江市为研究区,依据2005年,2010年和2015年3期土地利用数据,从生态系统服务功能角度,运用Costanza的方法,结合谢高地修正的我国生态服务价值当量因子表,分析了晋江市土地利用变化与生态服务价值的响应关系。结果表明:2005-2015年,晋江市的城镇用地显著扩张,而耕地和林地却急剧减少,土地利用的生态系统服务价值总体呈逐年下降趋势。通过分析晋江市土地利用变化对生态服务价值的影响可以为科学合理利用土地,保障人口、资源、环境的可持续发展提供决策支持。敏感性分析表明,生态服务价值对生态服务价值系数的变化是缺乏弹性的,因此结果是可信的。在编制土地利用规划时应将生态服务价值考虑其中,尤其是应注重保护湿地、水域、林地等生态服务价值系数高的土地利用类型,以期实现晋江市的可持续发展。 相似文献