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   44665篇
  免费   1217篇
  国内免费   786篇
财政金融   2749篇
工业经济   2251篇
计划管理   12242篇
经济学   6468篇
综合类   6932篇
运输经济   529篇
旅游经济   901篇
贸易经济   5621篇
农业经济   3799篇
经济概况   5175篇
信息产业经济   1篇
  2024年   134篇
  2023年   455篇
  2022年   600篇
  2021年   905篇
  2020年   1177篇
  2019年   738篇
  2018年   672篇
  2017年   922篇
  2016年   907篇
  2015年   1281篇
  2014年   3258篇
  2013年   3321篇
  2012年   3846篇
  2011年   4796篇
  2010年   3625篇
  2009年   3064篇
  2008年   3414篇
  2007年   3137篇
  2006年   2892篇
  2005年   2196篇
  2004年   1639篇
  2003年   1077篇
  2002年   703篇
  2001年   586篇
  2000年   428篇
  1999年   228篇
  1998年   148篇
  1997年   110篇
  1996年   83篇
  1995年   58篇
  1994年   61篇
  1993年   41篇
  1992年   34篇
  1991年   21篇
  1990年   17篇
  1989年   14篇
  1988年   6篇
  1987年   7篇
  1986年   10篇
  1985年   14篇
  1984年   16篇
  1983年   13篇
  1982年   7篇
  1981年   3篇
  1980年   2篇
  1979年   2篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
养老保险金替代率研究   总被引:2,自引:1,他引:1  
养老保险金替代率是指一定地区当年离退休(含退职,下同)人员的养老金平均水平与该地区当年职工平均工资水平的比率,其是否合理,将影响到养老保险制度安排和政策取向。养老保险金替代率目标的确定,将受到一个国家或者地区的社会保障水平和经济发展水平等因素的影响。按照中国对基本养老保险制度改革的总体思路,未来基本养老保险金替代率目标确定为60%左右。目前,中国基本养老保险金替代率目标已经接近制度改革的目标,北京市的基本养老保险金替代率明显低于全国水平。企业退休金的替代率又明显低于事业和机关单位的退休金替代率,并呈现持续下降的趋势,应当设法进行遏止。  相似文献   
82.
83.
On the Role of Weight Restrictions in Data Envelopment Analysis   总被引:3,自引:3,他引:0  
This paper examines the role that weight restrictions play in Data Envelopment Analysis (DEA). It is argued that the decision to include a factor (input or output) in a DEA model represents an implicit judgement that the factor has a non-trivial weight. It therefore seems perverse to allow DEA to assign a trivial weight to that factor in assessing the efficiency of a unit. There is therefore a strong case for imposing restrictions on factor weights. However, many existing methods of weight restriction are in practice unwieldy. This paper proposes an alternative approach we term contingent weight restriction which is both practical and intellectually consistent with the DEA philosophy. The paper explores the implications of alternative methods of weight restriction using simulated data from a well known production process.  相似文献   
84.
The importance of evaluating a discipline system from an ethical perspective is considered. Disciplinary practices in contemporary organizations are frequently characterized by managers having to choose from among alternative courses of corrective action. Since the selected alternative may have serious consequences for the individuals involved, its rightness or wrongness is of concern. The pattern of these choices reflects the overall disciplinary practice of the organization, and is an issue that warrants attention from an ethical perspective. Basic schools of thought that influence contemporary discipline practices are discussed and suggestions are made for conducting an evaluation of the ethical nature of a discipline system.  相似文献   
85.
This paper examines a scheme of economic incentives for environmental protection, in which spatially differentiated pollution taxes are in use in compensating the pollution abatement costs. A simple mathematical model is described which determines an incentive system that encourages polluters to reduce the discharges to an acceptable level of ambient quality standards in a cost-effective manner. It is shown that the vector of pollution charges has to be proportional to the marginal abatement cost vector, but is smaller than the latter in magnitude. It is demonstrated that a necessary incentive effect may be achieved even if the total pollution charge is much lower (about three times) than the total abatement costs. It is also estimated how this charge incentive system reconciles conflicting criteria of cost-effectiveness and of equity. These conclusions are verified by numerical experiments with real data.  相似文献   
86.
我国内部控制规范建设历程及现实思考   总被引:2,自引:0,他引:2  
本文从我国内部控制规范建设历程的回顾入手,总结出我国在内部控制规范建设方面的特点,进而结合我国的现实情况提出在借鉴国际先进经验,尽快完善内部控制规范体系的基础上进一步优化内部控制环境,推进内部控制规范的实施的建议。  相似文献   
87.
Realistically, organizational and/or system performance is dynamic and non-linear. However, in the efficiency literature, system performance is frequently evaluated considering linear combinations of the input/output variables and without explicitly taking into account the causes of efficiency behavior nor the dynamic behavior of systems. Policy decisions based on these results may be sub-optimized because the non-linear relationships among variables, causal relationships, and feedback mechanisms are ignored.This research takes the initial step of evaluating system performance in a dynamic environment, by relating the factors that effect system performance to the policies that govern it. To accomplish this, this paper extends the concepts of the static production axioms into a dynamic realm, where inputs are not instantaneously converted into outputs. The relationships of these new dynamic production axioms to the basic behaviors associated with system dynamics structures are explored.  相似文献   
88.
We examine the two traditions of content analysis: the first in which one substitutes words of a text with categories, and the second in which one looks for clusters of words that may refer to a theme. In the first tradition, preexisting dictionary categories give meaning to the words; in the second, meaning comes after the fact. Preexisting dictionary categories (the substitution model) are calibrated instruments applied within experimental designs that leave no space for doubt; meanwhile, the ability of the correlational model to conjure up complex themes from fragments of a text yields no unique solution. These differences have bearings on the production of new social knowledge. We expound on the epistemological foundations of the two traditions of interpretation and draw from them decision rules upon which one may rely for choosing among appropriate content-analytic tactics. Two reasons make this essay timely and critical: (1) the increasing variety of new content-analyticsoftware for particular purposes and (2) the almost exclusive focusing on software and technology at the expense of adjusting the choice of the software to the nature of the text. Two studies, one in historiometry, the other in autobiography, illustrate the liabilities and benefits of the two models of content analysis.  相似文献   
89.
欧阳忠 《企业技术开发》2005,24(6):40-42,67
文章针对公路桥梁,利用有限元方法分析在地震载荷下的应力分布规律,为桥梁抗震设计提供依据。  相似文献   
90.
Chi-Yo  Joseph Z.  Gwo-Hshiung   《Technovation》2007,27(12):744-765
Since the year 2000, silicon intellectual property (SIP), which can minimize the gap in ‘design productivity’ that exists with systems-on-chip (SOC), has become one of the most important factors in the development of integrated circuit (IC) products in the SOC era. Although SIP is very important for IC industry development, complicated business, technical as well as legal issues inside SIP transactions have hindered successful transactions and the integration of SIPs into SOCs. Thus, web-based SIP e-Commerce mechanisms, called SIP Malls, have emerged, aiming to resolve complex SIP issues. To maintain its leading position and competitiveness in the World's IC industry, as well as the value added by SOC products in Taiwanese IC firms, the Taiwanese government has developed SIP Malls, using innovation policy tools. However, the Taiwanese SIP Mall industry remains immature. No existing Taiwanese SIP Malls generate a profit or account for a significant share of worldwide SIP transactions. This research will develop an analytical framework for defining an innovation policy portfolio that aims to develop Taiwan's SIP Mall industry, so that it will enhance the value added of SIP Malls and, thus, the nation's competitiveness in the SIP and IC industries, something which already has become one of the Taiwanese government's major concerns. The industry innovation requirements (IIRs) are summarized using the Delphi method. Meanwhile, the major IIRs identified by Decision Making Trial and Evaluation Laboratory (DEMATEL) are introduced. After the IIRs are derived, the relationships between the IIRs and innovation policy tools are derived by Grey relational analysis (GRA). Then, the innovation policy tools are clustered, based upon the Grey grades derived by GRA. Finally, reconfigured innovation policy portfolios are presented for the Taiwanese government's policy definition. The results demonstrate that developing an innovative policy portfolio that includes scientific, technical, educational, public enterprise, information, legal and regulatory, financial, and taxation policy tools will be the most necessary step towards developing Taiwan's SIP Mall industry.  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