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   240篇
  免费   12篇
  国内免费   2篇
安全科学   63篇
废物处理   10篇
环保管理   34篇
综合类   31篇
基础理论   58篇
污染及防治   36篇
评价与监测   15篇
社会与环境   6篇
灾害及防治   1篇
  2023年   5篇
  2022年   4篇
  2021年   5篇
  2020年   4篇
  2019年   4篇
  2018年   10篇
  2017年   6篇
  2016年   9篇
  2015年   10篇
  2014年   3篇
  2013年   23篇
  2012年   18篇
  2011年   20篇
  2010年   23篇
  2009年   12篇
  2008年   10篇
  2007年   10篇
  2006年   12篇
  2005年   6篇
  2004年   6篇
  2003年   3篇
  2002年   7篇
  2001年   3篇
  2000年   2篇
  1999年   4篇
  1998年   2篇
  1997年   3篇
  1996年   1篇
  1995年   2篇
  1994年   4篇
  1992年   1篇
  1991年   7篇
  1990年   3篇
  1988年   1篇
  1987年   1篇
  1984年   1篇
  1983年   1篇
  1981年   1篇
  1980年   1篇
  1979年   1篇
  1977年   1篇
  1975年   1篇
  1972年   1篇
  1971年   1篇
  1964年   1篇
排序方式: 共有254条查询结果,搜索用时 62 毫秒
251.
Wash water in waterworks: contaminants and process options for reclamation   总被引:1,自引:0,他引:1  
Reclamation of clean water from filter backwash water was studied through pilot-scale experiments.The pilot plant consisted of clarification,sand-filtration,and ultrafiltration modules in sequence,with a provision to bypass the sand filter.Clean water that conformed to World Health Organization (WHO) guidelines on Potable Quality was reclaimed.Turbidity,aluminum and iron were found to be critical contaminants in process selection and design.Clarification,followed by sand filtration,was found to be the minim...  相似文献   
252.
The seasonality, patterns and the climate associations of the reported cases of dengue in the Caribbean were studied by analyzing the annual and monthly variability of reported cases as well as those of climate parameters (temperature and precipitation). More attention was given to Trinidad and Tobago, Barbados, and Jamaica, as those countries contributed mostly to the reported cases. The data were for the period 1980–2003. Results showed that the incidence of dengue in the Caribbean were higher in the last decade (1990s) compared to that in the previous decade (1980s). The yearly patterns of dengue exhibited a well-defined seasonality. The epidemics appeared to occur in the later half of the year following onset of rainfall and increasing temperature. Analysis revealed that the association of the epidemics with temperature was stronger, especially in relation to the onset of dengue, and the probability of epidemics was high during El Niño periods. In years with early warmer periods epidemics appeared to occur early, which was a scenario more probable in the year after an El Niño (an El Niño + 1 year). Indices linked to temperatures that are useful for gauging the potential for onset of dengue were examined. An index based on a moving average temperature (MAT) appeared to be effective in gauging such potential and its average (AMAT) signals a threshold effect. MAT index has potential use in adaptation and mitigation strategies.  相似文献   
253.
Environmental Science and Pollution Research - Previous studies have found that non-optimal temperature influences the development of gout, but the results have been inconsistent. The present study...  相似文献   
254.
In conservation, trust and justice are increasingly recognized as both intrinsically valuable and critical for successful socioecological outcomes. However, the interdependence between these concepts has not been explored. The conservation trust literature provides examples of efforts to build trust between conservationists and local actors; yet, these interventions are often conceived to incentivize local cooperation within dominant paradigms. We argue that when trust building is promoted as a technical fix that does not plan in advance to address power asymmetries in conservation practice, inequities may inadvertently be re-embedded. Therefore, we conceptualized a framework that joins trust, justice, and power so that critical analyses of conservation partnerships can be more effectively undertaken. We drew on environmental justice theory to better calibrate the trust literature for the historical-political settings of conservation, especially in the Global South. Justice and trust share strong theoretical links where perceptions of justice shape a willingness to trust, and, equally, trust is a precondition for justice to be perceived. Different forms of trust connect to varied domains of justice and power in different ways, which mediates the outcomes of interventions. We applied our framework to case studies to explore how these interdependences play out in practice. Failure of agencies to attend to issues of maldistribution, misrecognition of cultural values and knowledge, and exclusion from participation strongly compromised trust. Moreover, the ways in which nature-dependent communities and marginalized conservation workers are trusted, or the conditions under which they give trust, can lead to partnerships being perceived as just or unjust. Focusing on trust and justice can help identify power dynamics so they can be addressed more readily and create space for alternative understandings of partnerships.  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