全文获取类型
收费全文 | 92篇 |
免费 | 0篇 |
国内免费 | 2篇 |
专业分类
安全科学 | 1篇 |
废物处理 | 1篇 |
环保管理 | 20篇 |
综合类 | 15篇 |
基础理论 | 15篇 |
污染及防治 | 16篇 |
社会与环境 | 24篇 |
灾害及防治 | 2篇 |
出版年
2021年 | 2篇 |
2019年 | 2篇 |
2017年 | 5篇 |
2016年 | 2篇 |
2015年 | 1篇 |
2014年 | 3篇 |
2013年 | 2篇 |
2011年 | 5篇 |
2009年 | 14篇 |
2008年 | 2篇 |
2007年 | 5篇 |
2005年 | 1篇 |
2004年 | 2篇 |
2001年 | 1篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1994年 | 1篇 |
1985年 | 7篇 |
1984年 | 7篇 |
1983年 | 11篇 |
1982年 | 8篇 |
1981年 | 1篇 |
1980年 | 2篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1977年 | 3篇 |
1975年 | 2篇 |
1973年 | 1篇 |
排序方式: 共有94条查询结果,搜索用时 15 毫秒
71.
72.
Crop genetic resources constitute an important aspect of biodiversity conservation, both because of their direct value to the farmers and due to their indirect global value. This study uses the contingent valuation method to document the economic value of crop genetic resources based on the farmers' willingness to pay for conservation. A total of 107 households in Kaski, Nepal were surveyed in November 2003. Their mean willingness to pay was USD 4.18 for in situ and USD 2.20 for ex situ conservation per annum. Landholding size, household size, education level, socio-economic status, sex of respondent, number of crop landraces grown, and knowledge on biodiversity influenced the willingness to pay for in situ conservation, whereas only landholding size and household size influenced the willingness to pay for ex situ conservation. The respondents were willing to contribute more for in situ than ex situ conservation because of the additional effect of direct use and direct involvement of the farmers in in situ conservation. This study supports the view that economic valuation of crop genetic resources can assist the policy makers in setting conservation priorities. 相似文献
73.
Willingness to Pay for Improving the Residential Waste Disposal System in Korea: A Choice Experiment Study 总被引:1,自引:0,他引:1
This study attempts to apply choice experiments with regard to the residential waste disposal system (RWDS) in Korea by considering
various attributes that are related to RWDS. Using data from a survey conducted on 492 households, the empirical analysis
yields estimates of the willingness to pay for a clean food-waste collection facility, the collection of small items (such
as obsolete mobile phones and add-ons for personal computers), and a more convenient large waste disposal system. The estimation
results of multinomial logit models are quite similar to those of nested logit models. The results reveal that residents have
preferences for the cleanliness of facilities and the collection of small items. In Korea, residents are required to purchase
and attach stickers for the disposal of large items; they want to be able to obtain stickers at not only village offices but
also supermarkets. On the other hand, the frequency of waste collection is not a significant factor in the choice of the improved
waste management program.
相似文献
Seung-Hoon YooEmail: |
74.
Spatial welfare heterogeneity is frequently modeled within stated preference analysis as a function of discrete or continuous distance between households and affected resources. A common example is distance-decay analysis. Although distance-based models such as these are easily estimated, the ubiquity of this paradigm can lead to analyses that overlook other forms of analysis with equal or greater relevance. This paper develops an alternative approach to spatial heterogeneity in stated preference willingness to pay (WTP) based on the quantity or area of an affected resource surrounding each respondent at an optimized distance band or radius, with distance bands optimized using a grid-search algorithm that maximizes model likelihood. Methods and results are illustrated using a choice experiment on riparian land restoration in Maine, USA. The resulting quantity-within-distance model identifies systematic spatial patterns that are undetectable using distance-based analysis and directly relevant for welfare analysis. 相似文献
75.
76.
William O'Neil Martin David Christina Moore Erhard Joeres 《Journal of Environmental Economics and Management》1983,10(4):346-355
Recent emphasis on reforms of environmental regulation has led to suggestions for strategies which maintain environmental standards but allow the needed flexibility and cost effectiveness. The transferable discharge permit (TDP) is one such strategy for water pollution control recently adopted in Wisconsin. In this article, the potential for substantial cost savings from trading TDPs is demonstrated using data on the Fox River in Wisconsin. A simulation model of water quality (Qual-III) and a linear programming model of abatement costs determine the optimum pattern of discharge. Reaching that optimum from proposed pollution abatement orders is shown to be feasible. Varying conditions of flow and temperature can be accommodated using trade coefficients which can be accurately estimated through interpolation. The calculations demonstrate the value and feasibility of flexible regulations governing water pollution abatement. 相似文献
77.
Eden S. H. Yu Charles A. Ingene 《Journal of Environmental Economics and Management》1982,9(4):304-310
The backward incidence of pollution controls onto the polluting and nonpolluting industries is examined in a two-sector, rigid-wage economy characterized by unemployment in both the short run and the long run. As expected, more restrictive pollution controls result in contraction in the polluting sector and expansion in the nonpolluting sector. Somewhat unexpectedly, national income may rise with stronger pollution controls, if the polluting industry is relatively capital intensive. 相似文献
78.
意愿调查价值评估法的问卷设计技术 总被引:15,自引:0,他引:15
意愿调查价值评估法是目前西方广泛采用的一种环境物品经济价值的评估方法。它的优越性在于适用范围广 ,能够完整地评价环境物品的价值。但是由于偏差的存在 ,这一方法需要深入研究 ,精心设计 ,其中调查问卷的设计尤为重要。本文系统地分析了意愿调查价值评估法的问卷设计技术 ,包括环境物品、支付工具、评价背景和问卷的预先检查。采用适当的问卷设计技术的最终目的是减小偏差 ,提高调查结果的准确性 相似文献
79.
80.