全文获取类型
收费全文 | 1605篇 |
免费 | 62篇 |
国内免费 | 18篇 |
专业分类
财政金融 | 67篇 |
工业经济 | 157篇 |
计划管理 | 221篇 |
经济学 | 361篇 |
综合类 | 182篇 |
运输经济 | 13篇 |
旅游经济 | 45篇 |
贸易经济 | 158篇 |
农业经济 | 308篇 |
经济概况 | 173篇 |
出版年
2024年 | 11篇 |
2023年 | 27篇 |
2022年 | 35篇 |
2021年 | 54篇 |
2020年 | 49篇 |
2019年 | 55篇 |
2018年 | 35篇 |
2017年 | 58篇 |
2016年 | 47篇 |
2015年 | 34篇 |
2014年 | 88篇 |
2013年 | 129篇 |
2012年 | 88篇 |
2011年 | 106篇 |
2010年 | 106篇 |
2009年 | 96篇 |
2008年 | 116篇 |
2007年 | 96篇 |
2006年 | 107篇 |
2005年 | 95篇 |
2004年 | 61篇 |
2003年 | 50篇 |
2002年 | 33篇 |
2001年 | 28篇 |
2000年 | 31篇 |
1999年 | 15篇 |
1998年 | 8篇 |
1997年 | 9篇 |
1996年 | 7篇 |
1995年 | 6篇 |
1993年 | 2篇 |
1992年 | 1篇 |
1989年 | 1篇 |
1984年 | 1篇 |
排序方式: 共有1685条查询结果,搜索用时 9 毫秒
1.
各向异性厚板固有频率的精确解 总被引:3,自引:0,他引:3
该文抛弃薄板理论的位移和应力假设,利用矩阵分析和三维弹性动力学理论,导出四边简支各向异性厚板的固有频率方程。该方法可推广应用于各向异性层合板动力分析。 相似文献
2.
西气东输工程用感应加热弯管技术条件探讨 总被引:1,自引:0,他引:1
在对国外X70管线弯管技术条件进行调查分析与研究的基础上,对其中的几个关键技术问题包括母管成分,弯管的制造工艺和技术路线,强度与韧性要求,屈强比,Cu污染问题等进行了讨论。一些观点在西气东输感应加弯管技术条件中得到应用。 相似文献
3.
Following Parsian and Farsipour (1999), we consider the problem of estimating the mean of the selected normal population, from two normal populations with unknown means and common known variance, under the LINEX loss function. Some admissibility results for a subclass of equivariant estimators are derived and a sufficient condition for the inadmissibility of an arbitrary equivariant estimator is provided. As a consequence, several of the estimators proposed by Parsian and Farsipour (1999) are shown to be inadmissible and better estimators are obtained.
Received January 2001/Revised May 2002 相似文献
4.
我国自然资源行政许可之缺陷及其原因分析——一种法经济学视角 总被引:1,自引:0,他引:1
王盛军 《贵州财经学院学报》2006,(4):94-98
通过行政许可手段保护自然资源是目前各国通行的做法,它为自然资源开发利用负外部性过程中出现的市场失灵问题提供了重要的解决办法.但是,由于当前我国行政许可法律制度不完善,行政机关通过设定、实施自然资源行政许可创造寻租机会,与被许可人博弈、恶意串通等方式实现政府自身利益最大化,导致了政府配置自然资源的失灵. 相似文献
5.
我国资源产权及制度安排思考 总被引:3,自引:0,他引:3
方虹 《北京劳动保障职业学院学报》2006,14(1):48-51
长期以来,我国国有资产管理的侧重点一直放在国有经营性资产上面,而对资源性资产和非经营性资产关注甚少。自然资源产权关系长期界定不清,产权制度安排不够合理,从而导致资源粗放经营、低效配置、资源质量下降、环境污染加剧等一系列负的外部效应发生,影响了资源的可持续利用。从资源保护的角度设置一个好的产权结构非常重要,加强对资源的产权关系及产权制度安排的研究也显得越来越必要,它关系到资源利用效率的高低和经济的可持续发展。 相似文献
6.
课题组 《西安财经学院学报》2006,19(5):22-27
本文通过榆林市与科威特经济、福利发展的比较,探讨了自身资源型区域经济和福利协调发展的特点。就榆林市产业发展来看,目前的问题是中央与地方产权平衡与管理问题;中央对地方的环境补偿援助平衡问题;地方可持续发展经济激励问题;地方群众“根”文化教育与崛起问题。 相似文献
7.
持续利用的自然资源价格论 总被引:1,自引:0,他引:1
本文提出了自然资源持续利用的福利准则及价格构成,并且还阐述了有关自然资源持续利用的价格理论问题。旨在完善自然资源的价格理论体系。 相似文献
8.
The Productivity of US States since 1880 总被引:1,自引:0,他引:1
This study uses state-level variation in labor productivity levels at twenty-year intervals between 1880 and 1980 to examine the relative importance of institutional and geographical influences in explaining observed and persistent differences in standards of living over time and across regions. Focusing on fundamental rather than proximate influences, we find that both institutional characteristics and some physical geography characteristics account for a high proportion of the differences in state productivity levels: states with navigable waterways, a large minerals endowment, and no slaves in 1860, on average, had higher labor productivity levels throughout the sample period. However, we find little support for two other influences that have previously received attention—climate and latitude. 相似文献
9.
Oh Sang Kwon 《Environmental and Resource Economics》2006,33(4):463-483
This study extends the great fish war model of Levhari and Mirman [Levhari, D. and Mirman, L. (1980) Bell Journal of Economics 11: 322–344] by incorporating a multiple country context into the model and investigates the existence of a partial coordination
Nash equilibrium. First, findings of this paper suggest that a partial coordination scheme is sustainable only in limited
cases. Any coalition that has more than two member countries cannot be sustained. Second, the existence and the number of
coordinating countries depend critically on the magnitude of the biological and preference parameters. Finally, if the coalition
is assumed to be a dominant player, there always exist one or two welfare-improving sustainable coalitions and the size of
the sustainable coalitions depends on the parameters of the problem. 相似文献
10.
Ahmet?Kuba?Email author Fatih?Yilmaz Ya?ar?Akta? Nurcan?Met?N 《Quality and Quantity》2005,39(5):615-623
Multinomial Logit Model has analyzed the relationship between the frequency of visits to recreation areas and the motivational factors affecting the visits. Kastro Environment Preserving Site that is located in the Black Sea coast of Marmara region in Turkey, has been chosen as the site for this study. Kastro bay is a natural park that is visited only for recreational visits. The study has been conducted on a photogenic study group due to the proximity factor of Kastro bay close to Istanbul. Kastro bay is a popular recreational park due to its characteristic advantages such as a 200 m wide and approximately 2.5 km long beach and with its high quality vegetation. The vegetation type includes ash tree, oak tree, black pine, sand lily etc. Kastro bay is also the site for the Mediterranean seals (Monachus-monachus) which are at the level of extinction. Approximately 50,000 visitors visit the region during the months of July and August. It has been concluded that there is high direct correlation between the frequency of visits and the motivational factors. It has been determined that the visits are mostly based on the sea and the ecological tourism.Jel: O13, Q20, Q26, Q51, Q56, Q57 相似文献