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   77篇
  免费   1篇
环保管理   16篇
综合类   38篇
基础理论   7篇
环境理论   1篇
污染及防治   8篇
评价与监测   6篇
社会与环境   2篇
  2019年   2篇
  2018年   1篇
  2017年   1篇
  2016年   1篇
  2015年   1篇
  2014年   1篇
  2013年   4篇
  2012年   1篇
  2010年   1篇
  2009年   3篇
  2008年   2篇
  2007年   4篇
  2006年   2篇
  2004年   1篇
  2002年   1篇
  2001年   2篇
  2000年   2篇
  1998年   1篇
  1997年   2篇
  1996年   1篇
  1995年   3篇
  1994年   1篇
  1993年   1篇
  1989年   2篇
  1988年   1篇
  1987年   1篇
  1986年   1篇
  1984年   1篇
  1982年   2篇
  1977年   1篇
  1974年   1篇
  1967年   2篇
  1966年   1篇
  1962年   1篇
  1959年   3篇
  1957年   2篇
  1955年   1篇
  1954年   2篇
  1952年   1篇
  1951年   1篇
  1943年   1篇
  1942年   1篇
  1939年   2篇
  1934年   1篇
  1932年   1篇
  1931年   1篇
  1930年   2篇
  1926年   3篇
  1925年   2篇
  1924年   1篇
排序方式: 共有78条查询结果,搜索用时 343 毫秒
11.
12.
13.
14.
15.
16.
Making index insurance attractive to farmers   总被引:1,自引:0,他引:1  
There are several factors that influence whether people will want to participate in index insurance programs. A number of these influence their attractiveness on economic grounds, including both the size and timing of the premium and potential payouts, and the degree of risk aversion of the potential customers. Other factors make programs attractive for reasons that are not economic, but no less valid. These have to do with the trust that people have in the insurance product and the organizations involved in selling and managing it. Indeed, data from India, Africa, and South America show that these factors may be more important than the economic ones in influencing demand. Index insurance pilot projects, in order to estimate demand for alternative products, have typically involved a great deal of interaction with potential customers. It is important to recognize that such interaction is crucial not just as a research tool, but also as a means to build understanding and trust in the products. When scaling up from isolated pilots to operational programs, it is vital to recognize this trust building function by replicating participation efforts in every community. In this paper, we examine the role of field games in establishing and building trust in three important aspects of these projects for participants: trust in the insurance product, trust in the participating organizations, and trust in their own ability to make good decisions. While games have previously been used as a way to gauge interest in the product and to identify design features, we argue that these games are also valuable tools for constructing these kinds of trust.  相似文献   
17.
18.
The sensitivity of an integrated model to assess the potential for wind-borne spread of foot-and-mouth disease (FMD) to variations in key parameters controlling different physical and biological processes was evaluated. The estimated number of farms at risk is sensitive to the virus strain used and the accompanying effective contact rate. The C Noville strain increased the estimated number of exposed farms ranked as high and medium risk of being infected by a factor of 5, compared to the baseline, based on the O UKG 2001 strain. The inclusion of a model for biological ageing of the virus can also have a significant effect on the concentration patterns arising from transport and dispersion of the virus. Its inclusion has the practical advantage of markedly reducing the time required for the calculations. The estimated number of farms affected by exposure to high and medium virus concentrations is not grossly sensitive to attenuation caused by temperature or relative humidity effects. Changes in susceptibility to infection, as determined by the parameter θ in the exposure-risk model, does not change the configuration of the virus plumes, but it does change the distribution of farms at risk by risk category. These findings suggest that a good understanding of characteristics (excretion rates from infected animals, susceptibility of different species to infection, virus survival, etc.) of the virus strain involved in an FMD outbreak is necessary to provide a reliable assessment of the risk of wind-borne spread. In the event of an incursion of FMD, provision for laboratory studies on the virus will be an essential component of the disease response and should be factored into contingency plans.
X. YangEmail:
  相似文献   
19.
20.
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