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   297篇
  免费   0篇
  国内免费   8篇
安全科学   17篇
废物处理   10篇
环保管理   44篇
综合类   49篇
基础理论   53篇
污染及防治   91篇
评价与监测   19篇
社会与环境   19篇
灾害及防治   3篇
  2023年   8篇
  2022年   13篇
  2021年   18篇
  2020年   8篇
  2019年   4篇
  2018年   5篇
  2017年   9篇
  2016年   6篇
  2015年   7篇
  2014年   10篇
  2013年   38篇
  2012年   11篇
  2011年   13篇
  2010年   11篇
  2009年   14篇
  2008年   11篇
  2007年   16篇
  2006年   15篇
  2005年   12篇
  2004年   6篇
  2003年   10篇
  2002年   3篇
  2001年   1篇
  2000年   3篇
  1999年   2篇
  1998年   4篇
  1997年   2篇
  1996年   4篇
  1995年   1篇
  1994年   5篇
  1993年   3篇
  1992年   3篇
  1991年   1篇
  1990年   4篇
  1989年   4篇
  1987年   1篇
  1986年   4篇
  1985年   1篇
  1982年   3篇
  1981年   1篇
  1978年   1篇
  1973年   2篇
  1955年   1篇
  1938年   1篇
  1933年   1篇
  1931年   2篇
  1926年   1篇
  1920年   1篇
排序方式: 共有305条查询结果,搜索用时 46 毫秒
301.
The performance of gaseous air cleaners for commercial and residential buildings has typically been evaluated using test protocols developed for a controlled laboratory chamber or a test duct. It is currently unknown how laboratory measurements relate to the actual performance of an air cleaner installed in a real building. However, to date, there are no air cleaner field test protocols available, thereby limiting the existing field data. The National Institute of Standards and Technology (NIST) has conducted a series of experiments to support test procedure development for evaluating the installed performance of gaseous air cleaning equipment, as well as metrics for characterizing field performance. To date, over 100 experiments have been completed, of which 23 portable air cleaner experiments and 6 in-duct air cleaner experiments are described in this paper. Tests were conducted in a finished three-bedroom/two-bathroom manufactured house equipped with several gas chromatographs to semi-continuously measure air change rates and volatile organic compound concentrations. Experimental variables included air cleaner location, isolation of zones by closing doors, and contaminant source location. For each experiment, air cleaner removal of decane was directly measured using the air cleaner inlet and outlet concentrations, as well as with mass balance analyses using measured room concentrations. With a verified mass balance model, a field performance metric was developed to compare installed whole-building performance to the performance predicted by a laboratory result. The results provide insight into the protocols and metrics that might prove useful for characterizing the field performance of air cleaners as well as the impact of air cleaner removal on zonal concentration levels in a variety of situations.  相似文献   
302.
Environment, Development and Sustainability - Climate extremes over the years have been a major concern for the globalized world. The hardest hit from these climate extremes are women farmers with...  相似文献   
303.
Environmental Science and Pollution Research - One of the primary objectives of any public health programme is to design a protocol that will curtail a population from being predisposed to toxic...  相似文献   
304.
Environmental Science and Pollution Research - Aquaculture has emerged as one of the world’s fastest-growing food industries in recent years, helping food security and boosting global...  相似文献   
305.
Environmental Science and Pollution Research - Several studies have investigated the relationship between tourism, consumption of energy, globalization, and ecological footprint. However, the role...  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