全文获取类型
收费全文 | 263篇 |
免费 | 16篇 |
国内免费 | 8篇 |
专业分类
安全科学 | 67篇 |
废物处理 | 1篇 |
环保管理 | 71篇 |
综合类 | 64篇 |
基础理论 | 25篇 |
环境理论 | 1篇 |
污染及防治 | 3篇 |
评价与监测 | 11篇 |
社会与环境 | 24篇 |
灾害及防治 | 20篇 |
出版年
2023年 | 7篇 |
2022年 | 13篇 |
2021年 | 5篇 |
2020年 | 9篇 |
2019年 | 9篇 |
2018年 | 6篇 |
2017年 | 16篇 |
2016年 | 14篇 |
2015年 | 5篇 |
2014年 | 7篇 |
2013年 | 23篇 |
2012年 | 13篇 |
2011年 | 8篇 |
2010年 | 13篇 |
2009年 | 22篇 |
2008年 | 11篇 |
2007年 | 16篇 |
2006年 | 17篇 |
2005年 | 15篇 |
2004年 | 11篇 |
2003年 | 4篇 |
2002年 | 10篇 |
2001年 | 5篇 |
2000年 | 4篇 |
1999年 | 5篇 |
1998年 | 1篇 |
1997年 | 3篇 |
1995年 | 1篇 |
1993年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1983年 | 1篇 |
1978年 | 2篇 |
1974年 | 2篇 |
1971年 | 3篇 |
排序方式: 共有287条查询结果,搜索用时 46 毫秒
51.
Rapid assessments are one of the standard informational tools in humanitarian response and are supposed to contribute to rational decision-making.(1) The extent to which the assessment organisation itself behaves rationally, however, is an open question. This can be evaluated against multiple criteria, such as the cost and value of the information it collects and its ability to adapt flexibly design or samples when the survey environment changes unforeseeably. An unusual data constellation from two concurrent recent (2003-04) rapid assessments in northern Iraq permits us to model part of the actual assessment behaviour in terms of geographical, community and prior substantive information attributes. The model correctly predicts the decisions, in 79 per cent of the 2,425 local communities in focus, that data collector teams in the Emergency Mine Action Survey made to visit or not to visit. The analysis demonstrates variably rational behaviour under conditions of insecurity, repeated regrouping and incomplete sampling frames. A pronounced bias towards very small rural settlements is irrational for the overall results, but may be a rational strategy of individual survey workers seeking to prolong their employment. Implications for future assessments are sketched in the areas of tools for urban surveys, greater adaptability, including early feedback from users, and sensibility to value-of-information concepts. 相似文献
52.
53.
在机制上将一个地市(淮南市)的地震预报与防震决策融为一个动态整体,从而建立起一个实用性强的防震减灾决策系统,使城市各种防震对策的生成有了更科学的基础。成为市政府在防震减灾决策中不可缺少的工具。 相似文献
54.
基于粗糙集理论的路段交通事故多发点成因分析 总被引:7,自引:0,他引:7
交通事故多为多种原因综合造成且具有不确定性。判别各因素对于引发交通事故的影响程度存在困难,因此,需要引入不确定性分析方法。基于粗糙集理论具有处理不精确、不确定与不完全数据的优势,是一种先进的并处于不断发展的不确定性分析和推理方法。笔者提出路段上交通事故成因分析的模型和方法。具体做法是,根据该路段事故多发点的统计数据建立基于粗糙集理论的决策表,再利用粗糙集模型的简约算法求出各个因素的重要性,从而判断各因素对交通事故的影响程度大小,为决策提供依据。以算例说明模型和方法的可用性。 相似文献
55.
56.
57.
本文采用多目标排队决策法对专家的咨询意见进行了定量处理,从各用地部门的经济、生态和社会效益出发,确定了他们的优先级,并结合土地利用现状对今后的土地利用结构作出了合理的调整规划设想。 相似文献
58.
59.
Due to expansion of the capital area in Finland, industrial areas are being replanned for residential and commercial use. The soil in these areas is sometimes contaminated, and must therefore be cleaned before building. In spring 1997 the City of Helsinki and the National Technology Agency of Finland declared a contract-based competition for cleaning the polluted soil of the planned Toukolanranta residential area. Nine proposals entered the competition, and the problem was to choose three best candidates for test-cleaning a small part of the region considered. The winner of the test-cleaning phase will get the contract for cleaning the whole area. The proposals were evaluated based on five criteria defined by the competition board consisting of eight experts. The finalists were chosen aided by the SMAA-2 Stochastic Multicriteria Acceptability Analysis technique. SMAA-2 is a method for analysing what kind of preferences favour each alternative. This method is particularly useful in applications, where it is difficult or impossible to obtain accurate preference information. In this application SMAA-2 was observed to suit well for choosing a small set of best alternatives with different strengths and weaknesses. 相似文献
60.