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   10169篇
  免费   611篇
  国内免费   22篇
财政金融   635篇
工业经济   408篇
计划管理   2669篇
经济学   1486篇
综合类   1720篇
运输经济   111篇
旅游经济   396篇
贸易经济   1383篇
农业经济   709篇
经济概况   1285篇
  2024年   1篇
  2023年   143篇
  2022年   171篇
  2021年   250篇
  2020年   357篇
  2019年   221篇
  2018年   218篇
  2017年   280篇
  2016年   286篇
  2015年   376篇
  2014年   840篇
  2013年   1029篇
  2012年   1280篇
  2011年   1009篇
  2010年   860篇
  2009年   634篇
  2008年   670篇
  2007年   509篇
  2006年   427篇
  2005年   367篇
  2004年   238篇
  2003年   150篇
  2002年   116篇
  2001年   87篇
  2000年   93篇
  1999年   42篇
  1998年   27篇
  1997年   28篇
  1996年   17篇
  1995年   26篇
  1994年   9篇
  1993年   5篇
  1992年   3篇
  1990年   4篇
  1989年   1篇
  1987年   2篇
  1985年   6篇
  1984年   7篇
  1983年   8篇
  1982年   3篇
  1980年   1篇
  1979年   1篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
贯彻落实2012年全国烟草工作会议关于“卷烟上水平”的总体要求,河南省烟草公司鹤壁市公司对这一基本方针和战略任务做了全面部署。“市场监管上水平”将成为当前和今后一段时间专卖工作的中心。  相似文献   
2.
The bicycle is gaining ground as an inexpensive, fast, healthy, and enjoyable mode of transport, but the development of cycle infrastructures appears to be a necessary prerequisite for supporting further growth in cycling rates. Thus far, few studies have developed comprehensive methodologies for the prioritisation of cycling infrastructure investments, and the role of end users has been underestimated in this process. The unique relationship that cyclists develop with the bicycle itself, their co-cyclists, bicycle facilities, and the urban environment as a result of sensory, kinaesthetic, symbolic, or even political reasons can assist in designing cycle facilities that are more efficient and closer to fulfilling the needs and desires of users. We propose a comprehensive four-step methodology for cycle network planning, which both accounts for the city structure and the zones in which higher cycling demand is possible and uses participative multicriteria GIS processes to incorporate cyclists’ views with regard to choosing the cycle network segments. Our case study is Athens, Greece, where cycling facilities are few and heavily fragmented, although cycling demand has recently grown. This methodology may be useful for cities attempting to introduce and prioritise cycling infrastructures because it focuses on determining where cyclists would prefer to cycle to make such investments more successful in attracting users.  相似文献   
3.
How do we, as management researchers, develop novel theoretical contributions and, thereby, potentially break new ground in management studies? To address this question, we review previous methodological work on theorizing and advance a typology of the reasoning processes that underlie theoretical contributions and significant advances in management studies. This typology consists of various types of analogical and counterfactual reasoning, ranging from focused thought experiments aimed at prodding existing theory in the direction of alternative assumptions, constructs, and hypotheses to more expansive efforts for inducing new theoretical models and alternative explanations. Applying this typology, we detail the mechanisms behind the formation of novel theoretical contributions and illustrate the currency of our typology through a review of 24 major theoretical breakthroughs in management studies. We conclude the paper by discussing the implications of this typology for our collective efforts in building, elaborating, and expanding theory in management studies.  相似文献   
4.
This study tests the validity of using the CAPM beta as a risk control in cross‐sectional accounting and finance research. We recognize that high‐risk stocks should experience either very good or very bad returns more frequently compared to low‐risk stocks, that is, high‐risk stocks should cluster in the tails of the cross‐sectional return distribution. Building on this intuition, we test the risk interpretation of the CAPM's beta by examining if high‐beta stocks are more likely than low‐beta stocks to experience either very high or very low returns. Our empirical results indicate that beta is a strong predictor of large positive and large negative returns, which confirms that beta is a valid empirical risk measure and that researchers should use beta as a risk control in empirical tests. Further, we show that because the relation between beta and returns is U‐shaped, that is, high betas predict both very high and very low returns, linear cross‐sectional regression models, for example, Fama–MacBeth regressions, will fail on average to reject the null hypothesis that beta does not capture risk. This result explains why previous studies find no significant cross‐sectional relation between beta and returns.  相似文献   
5.
以国外工业遗产旅游开发为例,对我国贯彻科学发展观、走新型工业化道路、大力发展工业旅游具有重大借鉴意义。人类早期工业文明是建立在破坏生态环境的基础上的,现在,发展工业不能再以破坏生态为代价,还要对工业遗产合理利用。把工业遗产作为一种可利用的旅游资源,符合走新型工业化道路,从而减少对生态环境的破坏,实现人与自然和谐发展。  相似文献   
6.
Beaches are social–ecological systems where plainly physical, ecological, social and economic dimensions interact, providing several functions and services leading to improved human well-being. Although these systems can provide several protective, recreational and natural functions, only recreation has been traditionally prioritized by managers. This has led to the homogenization of beach management practices, which are poorly adapted to beach settings and beach users. While public participation was highly encouraged, decision-making has traditionally been done by a single stakeholder following a strict hierarchic order. In two antagonistic beaches (natural protected vs. urban) we assess and compare users’ expectations and perceptions that could suggest the necessity of a differential management. Behind an apparent homogeneity, significant differences were detected between these two antagonistic beaches. Although certain normal preferences were common in both beaches, natural attributes were the priority in the natural protected setting, as well as facilities in the urban one. However, the influence of traditional mass tourism model on users’ expectations was undeniable. Particular management frameworks for beaches with singular natural characteristics are necessary. A special emphasis on education and information is needed, as a cornerstone for a sustainable use of these social–ecological systems.  相似文献   
7.
This study explores Australian small-scale rural lifestyle landowners’ perceptions of and experiences with natural resource management (NRM) extension and incentive programmes and discusses means to better-match such programmes to these landowners’ NRM interests, assistance needs and delivery preferences. Data was collected from seventeen in-depth qualitative case-studies of small-acreage landholders located in the Noosa hinterland in south-east Queensland. These landholders indicated a high need for expert advice, labour and other resource assistance to achieve their property management objectives. They had, however, a low-level of awareness and understanding of available programmes (particularly incentive schemes) that could provide some of their needed support. Other key barriers to the landholders’ participation in these programmes were aversions to support providers, a perceived unsuitability of properties or irrelevance of particular incentive programmes, and concerns about programme application procedures or property-rights and value-related implications of engagement. Increased NRM engagement among small-scale lifestyle landowners may be achievable through amendments to existing support programmes and better communication of these programmes. The design and delivery of appropriate measures and messages may require collaborative partnerships, with knowledgeable and influential ‘go-to’ landowners and peer-mentoring networks playing a critical role. In many cases, conservation-focused incentive programmes may need to facilitate cooperative NRM among groups of adjoining micro-scale lifestyle landowners and allow greater flexibility in the length and allowable land and forest management practices of contractual agreements. Moreover, small-scale lifestyle landowners have much interest in and need for support to integrate multi-purpose agroforestry systems with other environmental and aesthetic property management goals. Workshops, follow-up field-days on participating properties, free one-on-one on-property advice, and NRM guides that include detailed case-study accounts of landowner experiences are important means of communicating the availability, administrative requirements and benefits of support programmes to small-scale lifestyle landowners.  相似文献   
8.
绿色生产视角下的“三品一标”发展研究   总被引:4,自引:0,他引:4  
在当前传统农业向现代农业转变的关键时期,推进绿色生产是保护农业生态环境、实现农业可持续发展的必然要求.绿色生产有着丰富的内涵和鲜明的特征,即生产过程标准化、终端产品优质化、整体效益最大化和发展方式可持续.“三品一标”和绿色生产在内涵和外延上高度统一,是绿色生产的具体表现形式,“三品一标”在促进农业生态环境保护、增强生产者绿色生产意识、促进农业生产方式转变和提升农产品质量安全水平等方面发挥了显著作用.本文在总结“三品一标”在促进绿色生产方面发挥的主要作用的基础上,重点探讨了如何积极发展”三品一标”的问题并就此提出了政策建议.  相似文献   
9.
介绍科技服务业的新内涵;分析科技服务业已发展成为知识经济重要成分和战略性产业的重要性。阐述国家和天津、广东、江苏、北京等地方发展科技服务业的措施。针对福建省科技服务业发展相对滞后的现状,提出福建省应首先从开展科技服务业专项统计、出台科技服务业发展规划与实施意见、设立科技服务业发展专项计划、设立科技服务业相关机构与网站等方面着手,加快科技服务业发展步伐的建议。  相似文献   
10.
农业高校是服务农业产业发展,推动科技成果转化,提升科技服务能力的重要力量。本文结合我校科技服务“三农”的实践,从“双百”科技富民工程的实施成效出发,分析了“双百”科技富民工程建设过程中出现的问题,探讨了产业技术联盟基地的建设思路,提出了加强产业技术联盟基地建设的具体措施。  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