全文获取类型
收费全文 | 4568篇 |
免费 | 185篇 |
国内免费 | 3篇 |
专业分类
财政金融 | 835篇 |
工业经济 | 309篇 |
计划管理 | 729篇 |
经济学 | 828篇 |
综合类 | 224篇 |
运输经济 | 70篇 |
旅游经济 | 268篇 |
贸易经济 | 878篇 |
农业经济 | 147篇 |
经济概况 | 461篇 |
邮电经济 | 7篇 |
出版年
2024年 | 16篇 |
2023年 | 50篇 |
2022年 | 56篇 |
2021年 | 104篇 |
2020年 | 162篇 |
2019年 | 227篇 |
2018年 | 212篇 |
2017年 | 209篇 |
2016年 | 156篇 |
2015年 | 141篇 |
2014年 | 178篇 |
2013年 | 575篇 |
2012年 | 296篇 |
2011年 | 350篇 |
2010年 | 278篇 |
2009年 | 253篇 |
2008年 | 241篇 |
2007年 | 183篇 |
2006年 | 193篇 |
2005年 | 169篇 |
2004年 | 87篇 |
2003年 | 80篇 |
2002年 | 68篇 |
2001年 | 61篇 |
2000年 | 38篇 |
1999年 | 51篇 |
1998年 | 44篇 |
1997年 | 30篇 |
1996年 | 32篇 |
1995年 | 20篇 |
1994年 | 22篇 |
1993年 | 19篇 |
1992年 | 17篇 |
1991年 | 20篇 |
1990年 | 12篇 |
1989年 | 12篇 |
1988年 | 11篇 |
1987年 | 8篇 |
1986年 | 5篇 |
1985年 | 7篇 |
1984年 | 7篇 |
1983年 | 9篇 |
1981年 | 5篇 |
1980年 | 7篇 |
1979年 | 10篇 |
1978年 | 3篇 |
1977年 | 5篇 |
1976年 | 3篇 |
1975年 | 3篇 |
1974年 | 3篇 |
排序方式: 共有4756条查询结果,搜索用时 15 毫秒
41.
文章论述了环境问题对人类的重要性及创造环保型的企业环境需要解决的问题,在此基础上,提 出了为实现环保型企业经营韩国政府所应该采用的政策及具体的实施方案。 相似文献
42.
Kyoung‐Jae Kim 《International Journal of Intelligent Systems in Accounting, Finance & Management》2004,12(3):167-176
A feature transformation method based on domain knowledge for arti?cial neural networks (ANNs) is proposed. The method of feature transformation based on domain knowledge converts continuous values into discrete values in accordance with the knowledge of experts in speci?c application domains. This approach effectively ?lters data, trains the classi?er, and extracts the rules from the classi?er. In addition, it reduces the dimensionality of the feature space, which not only decreases the cost and time in the operation but also enhances the generalizability of the classi?er. The experimental results of the proposed approach will be compared and tested statistically with the results of the linear transformation method. The results show that the method of feature transformation based on domain knowledge outperforms the linear transformation in modelling of ANNs. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
43.
会计目标一直是西方会计界重点关注和研究的问题,近年来,我国会计理论界和实务界也对其投以越来越多的关注。本文试图从企业产权理论和制度变迁的角度,以利益相关者权益保护为主线研究会计目标,理清从受托责任观到决策有用观演进的必然性和合理性,并在分析英美、法德模式会计目标的差异后,结合当前我国会计准则国际趋同的背景,提出我国应确立以利益相关者权益保护为中心、以企业特征为导向、针对不同环境分别选择受托责任或决策有用为核心内容的会计目标构建思想。 相似文献
44.
This paper adopts Hsiao (1986) panel data techniques, with metropolitan-level panel data from Taiwan, to examine how the market structures of various related service markets and hotels’ locations affect hotels’ profitability. The empirical results indicate that: (1) market concentration in rooms could significantly improve international tourist hotels’ profitability, while concentration in the food and beverage markets have positive but insignificant effects, and (2) the locations of the international tourist hotels significantly affect their profitability. 相似文献
45.
In this paper, we discuss the properties of preliminary test estimators (PTE) of the parameters of simple linear model with
measurement error (ME model) when the slope of the linear model is suspected to be zero. Expressions of the bias, MSE and
efficiencies are obtained under conditional as well as unconditional situations with known reliability coefficient. Conditional
model results are compared to the standard model without measurement error. We also provide the unconditional model analysis
in finite samples. Asymptotic theory under local alternatives is developed when the variance of measurement error or the ratio
of the variance of the model error relative to the variance of the measurement error is known. Asymptotic expressions of bias
and MSE of the estimators along with their efficiencies are obtained. In every case, it is shown that the measurement error
tend to increase the variability of the estimators compared to the estimators without measurement error. Graphs and tables
are provided to see these results and to determine optimum level of significance for minimum guaranteed efficiency.
Received October 2001
RID="*"
ID="*" A. K. Md. E. Saleh is a Distinguished Research Professor and H. M. Kim is a Ph.D. candidate in the School of Mathematics
and Statistics, Carleton University, Ottawa.
Acknowledgment. The authors gratefully acknowledge the constructive suggestion of the referees to improve the paper. The research is supported
by NSERC grant A3088. 相似文献
46.
本文分析了第三方物流企业的经营特点,提出了比较适合于当前和第三物流企业发展的管理信息系统结构图,并在此基础上构建了系统的软件和网络结构,最后提出了系统的数据库设计方案。 相似文献
47.
Demand for product characteristics is examined within the context of models that allow for both corner and interior solutions corresponding to zero and non-zero demand. Product attribute information is associated with marginal utility and curvature (satiation) parameters of various utility functions. Empirical applications demonstrate the need for incorporating characteristics in a fairly general way. We also compare our approach to an ideal point and pure Lancasterian versions of our nonlinear utility model. The data support our model over either the ideal point or Lancasterian variants. 相似文献
48.
Jeong-Dong?LeeEmail author Seogwon?Hwang Tai-Yoo?Kim 《Journal of Productivity Analysis》2005,23(1):65-83
In this study we propose a mathematical definition of the consumption efficiency of multi-attribute products in the price–quality space. A new model, the discrete Range Adjusted Measure (RAM) model, is suggested as an empirical tool to measure the level of consumption efficiency. We further discuss the effect of consumption efficiency on the innovation incentive. Empirical work is made for the mobile phone market. We expect that the consumption efficiency concept will contribute to the extension of the traditional framework of production efficiency analysis on the one hand and to the understanding of the nature of innovation in a technology-intensive market on the other hand.JEL Classification: C67, D11, D12, D21 相似文献
49.
本文论证了双曲模型是描述中国货币市场利率动态变化的最佳单因子利率模型。由极大似然估计可以得到单因子利率模型的边际密度函数。双曲模型的边际密度和非参数估计得到的边际密度函数拟合较好,其表现远远优于几个常见的利率模型(CIR、CKLS和AG模型)。与较一般的Ait-Sahalia模型相比差别很小,但参数形式得到简化,似然比检验也支持这一点。双曲模型在刻画利率的均值回复特征方面还克服了AG模型的不足。 相似文献
50.
This paper applies Kim and Wardes (2004) stratified Warners randomized response model to Mangat and Singhs (1990) two-stage randomized response model. The proposed stratified randomized response model has an optimal allocation and a large gain in precision. Hence, the estimator based on the proposed method is more efficient than Kim and Wardes (2004) and Mangat and Singhs (1990) estimators under the conditions presented in both the case of completely truthful reporting and that of not completely truthful reporting by the respondents. 相似文献