首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   4651篇
  免费   89篇
  国内免费   49篇
财政金融   497篇
工业经济   274篇
计划管理   764篇
经济学   700篇
综合类   334篇
运输经济   13篇
旅游经济   20篇
贸易经济   433篇
农业经济   338篇
经济概况   616篇
水利工程   792篇
邮电经济   8篇
  2024年   11篇
  2023年   46篇
  2022年   98篇
  2021年   146篇
  2020年   128篇
  2019年   71篇
  2018年   55篇
  2017年   103篇
  2016年   80篇
  2015年   102篇
  2014年   118篇
  2013年   200篇
  2012年   356篇
  2011年   565篇
  2010年   498篇
  2009年   293篇
  2008年   347篇
  2007年   308篇
  2006年   352篇
  2005年   312篇
  2004年   103篇
  2003年   88篇
  2002年   67篇
  2001年   83篇
  2000年   49篇
  1999年   65篇
  1998年   42篇
  1997年   24篇
  1996年   18篇
  1995年   22篇
  1994年   17篇
  1993年   4篇
  1992年   10篇
  1991年   2篇
  1990年   1篇
  1989年   1篇
  1984年   3篇
  1983年   1篇
排序方式: 共有4789条查询结果,搜索用时 921 毫秒
1.
Li  Qian  Chen  Yan  Sun  Shikun  Zhu  Muyuan  Xue  Jing  Gao  Zihan  Zhao  Jinfeng  Tang  Yihe 《Water Resources Management》2022,36(12):4799-4817
Water Resources Management - Increasing water consumption in agriculture due to global climate change has posed considerable challenges to food security, thus improving the efficiency of water...  相似文献   
2.
Gao  Zehai  Liu  Yang  Li  Nan  Ma  Kangjie 《Water Resources Management》2022,36(8):2685-2702
Water Resources Management - Urban river not only has the important function in urban hydrological environment, but also is an area for entertainment. Water quality assessment is the core technique...  相似文献   
3.
We propose a Bayesian model to quantify the uncertainty associated with the payments per claim incurred (PPCI) algorithm. Based on the PPCI algorithm, two submodels are proposed for the number of reported claims run-off triangle and the PPCI run-off triangle, respectively. The model for the claims amount is then derived from the two submodels under the assumption of independence between the number of incurred claims and the PPCI. The joint likelihood of the number of reported claims and claims amount is derived. The posterior distribution of parameters is estimated via the Hamiltonian Monte Carlo (HMC) sampling approach. The Bayesian estimator, the process variance, the estimation variance, and the predictive distribution of unpaid claims are also studied. The proposed model and the HMC inference engine are applied to to an empirical claims dataset of the WorkSafe Victoria to estimate the unpaid claims of the doctor benefit. The Bayesian modeling procedure is further refined by including a preliminary generalized linear model analysis. The results are compared with those in a PwC report. An alternative model is compared with the proposed model based on various information criteria.  相似文献   
4.
新能源材料物理化学课程内容抽象、概念多、涉及面广、公式应用严格,与生活和科学前沿联系紧密。为提高课程教学质量,教师引入案例教学抓住课程核心;联系材料发展历史,增加课堂教学的趣味性;结合科学发展前沿,使教学内容能够与时俱进;注重概念和公式的融会贯通,增加材料调研大作业;线上线下教学模式相结合,采用多样化的教学方法及教学手段;通过形成性评价考核,加强教学过程监管。  相似文献   
5.
Journal of Business Ethics - Prior studies suggest that firms headquartered in areas with strong religious social norms have higher ethical standards. In this study, we examine whether the ethical...  相似文献   
6.
Little research has investigated the effect of ownership identity (or type) and corporate philanthropy experience on giving. In this research, relying on legitimacy theory, we first assess the effect of ownership identity on corporate philanthropy (CP) in the context of the 2008 earthquake in China. Then we explore moderation effects of firms' prior CP experience and size as proxies for perceived legitimacy on owners' efforts at increasing giving and legitimacy. We find that state and CEO ownership are deterrents, while non‐SOE and institutional ownership enhances giving probability and amount. In addition, there is evidence that firm size and prior CP weaken the effects of institutional ownership on CP. This study provides a complete assessment of owner behaviour. Copyright © 2018 ASAC. Published by John Wiley & Sons, Ltd.  相似文献   
7.
This paper examines the effects of idiosyncratic accounting information on a firm's cost of capital. By embedding a moral hazard problem into a multifirm asset‐pricing model, I show that moral hazard distorts the sharing of idiosyncratic risk but does not affect the sharing of systematic risk in the economy. A firm‐level improvement in idiosyncratic information reduces the firm's cost of capital even though it does not affect the implied cost of capital inferred from publicly traded shares. Moreover, an economy‐level improvement in idiosyncratic information reduces the risk premium for idiosyncratic risk but increases the risk premium for systematic risk, resulting in an ambiguous net effect on the firm's cost of capital. These results provide alternative explanations for the mixed empirical evidence on the relation between information quality and the cost of capital.  相似文献   
8.
This paper develops a platform‐based influencing factors model which considers value perception, risk prevention measure, non‐default experience, trust and incentive gap, to better examine the impact of platforms on investors’ satisfaction and lending intention based on the Chinese market. The results reveal that the first four factors positively influence the satisfaction of the investors, while the incentive gap has a negative impact, and there is a positive association between investors’ satisfaction and lending intention. Some specific features of China’s online lending market are identified, which provides valuable insights for online lending platforms and the government.  相似文献   
9.
入职重庆航空前,王秋丹是一名兼职模特,她爱拍照也特别会拍照.在她的微信朋友圈里,她有时化身邻家女孩在树荫下喝茶看书,有时变身异域少女载歌载舞……不管什么造型,照片里的她看起来总是美美的,特别上镜. 如何拍出这样美美的"大片"?王秋丹说除了选好环境、打扮漂亮之外,肢体语言也很重要,这里有一些小技巧.  相似文献   
10.
本文通过对庄河地区水资源的分析及未来需水量的预测,计算其区域余水量。以确定区域经济的规划。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号