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   479篇
  免费   15篇
财政金融   86篇
工业经济   57篇
计划管理   97篇
经济学   53篇
综合类   13篇
运输经济   2篇
旅游经济   13篇
贸易经济   115篇
农业经济   25篇
经济概况   31篇
邮电经济   2篇
  2020年   5篇
  2019年   7篇
  2018年   5篇
  2017年   10篇
  2016年   11篇
  2015年   8篇
  2014年   8篇
  2013年   53篇
  2012年   9篇
  2011年   22篇
  2010年   8篇
  2009年   12篇
  2008年   14篇
  2007年   17篇
  2006年   10篇
  2005年   12篇
  2004年   9篇
  2003年   21篇
  2002年   6篇
  2001年   13篇
  2000年   7篇
  1999年   9篇
  1998年   8篇
  1997年   12篇
  1996年   6篇
  1995年   8篇
  1994年   5篇
  1993年   6篇
  1992年   4篇
  1991年   7篇
  1990年   3篇
  1987年   3篇
  1986年   4篇
  1985年   5篇
  1984年   21篇
  1983年   7篇
  1982年   6篇
  1981年   9篇
  1980年   16篇
  1979年   13篇
  1978年   9篇
  1977年   9篇
  1976年   11篇
  1975年   7篇
  1974年   10篇
  1973年   6篇
  1971年   5篇
  1969年   2篇
  1968年   2篇
  1967年   3篇
排序方式: 共有494条查询结果,搜索用时 125 毫秒
491.
Implementation of a hazard analysis critical control point (HACCP) system by a Chinese poultry processing company required significant initial investments and greater monthly operation costs, including measures needed to meet prerequisite standard sanitary operating practices. HACCP benefits perceived by managers were diverse and difficult to ascertain—access to export markets seems to be the chief benefit. Large-scale, export-oriented plants appear to be able to bear the costs of HACCP implementation, but costs may be a greater barrier for smaller Chinese companies serving the domestic market.  相似文献   
492.
Originally introduced in a 1986 Long Range Planning article, the Quantitative Strategic Planning Matrix (QSPM) has become widely used in strategic management but is only rarely used in marketing strategy. This paper reveals how and why the QSPM should be commonly used in marketing strategy to assess the relativeness attractiveness of alternative strategies being considered. An example QSPM is developed in this paper for a firm considering two alternative marketing strategies: (1) Increase Advertising Expenditures by 50% vs. (2) Lower Menu Prices 10%. The QSPM process is exemplified and limitations are discussed herein. The primary contribution of this paper was to reveal how and why the QSPM can be useful, both theoretically and practically, in a devising an effective marketing strategy.  相似文献   
493.
Adequate flow of appropriate information to farmers is vital for accelerating the uptake of modern agricultural technologies and improving access to markets, all of which are important for the transformation of African economies. Yet there is limited evidence regarding how information should be disseminated to farmers to achieve the needed impact. Should ICT-based approaches be used together with traditional methods, or should they be used alone? We used cluster quasi-random and randomized experiments involving 140 villages in southern Mali to study three chains of causality: does farmer training increase knowledge? Does knowledge lead to change in behavior? Do the different actions generate varying economic outcomes? We show that the role of farmer training in the uptake of extension advice may be overstated in some settings; that procrastination and inattention are more binding constraints to recommendation adherence than information per se; and that such constraints could be mitigated by timely voice SMS reminders. Although timely reminders nudged farmers to take-up recommendations, leading to meaningful improvements in some intermediate outcomes, these impacts were not large enough to generate improvements in output, prices and profits in the short term. These findings must be interpreted within the context of imperfect compliance with experimental protocols, which pose threats to both the internal and external validity of some of the impact estimates.  相似文献   
494.
Metrics addressing process safety incident performance typically focus on frequency and severity statistics. Often, these lagging metrics are not overly sensitive to actual performance, making trending and forecasting difficult. This article presents the results from a statistical study of a large incident dataset where changes in the Pareto shape parameter were observed as a function of time. This approach has been found to give far better insight into process safety performance than traditional incident metrics and readily relates back to concepts such as the “incident triangle” and “layers of protection.” Through the application of this approach, trends within process safety incident performance have been observed earlier, and more accurate forecasting has allowed for the identification of anomalies. In turn, these critical observations have allowed for the better structuring and targeting of process safety programs. Although incident data are generally considered as a lagging indicator, this approach has clearly reduced the lag time associated with this type of data and has given valuable insight into the current status of process safety performance. © 2009 American Institute of Chemical Engineers Process Saf Prog 2009  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