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   12449篇
  免费   406篇
  国内免费   1029篇
安全科学   412篇
废物处理   869篇
环保管理   1408篇
综合类   3102篇
基础理论   3543篇
污染及防治   2134篇
评价与监测   1237篇
社会与环境   1045篇
灾害及防治   134篇
  2024年   20篇
  2023年   84篇
  2022年   236篇
  2021年   223篇
  2020年   252篇
  2019年   168篇
  2018年   1616篇
  2017年   1543篇
  2016年   1332篇
  2015年   338篇
  2014年   238篇
  2013年   251篇
  2012年   732篇
  2011年   1608篇
  2010年   926篇
  2009年   770篇
  2008年   1072篇
  2007年   1421篇
  2006年   163篇
  2005年   119篇
  2004年   119篇
  2003年   136篇
  2002年   185篇
  2001年   88篇
  2000年   68篇
  1999年   30篇
  1998年   23篇
  1997年   19篇
  1996年   20篇
  1995年   10篇
  1994年   12篇
  1993年   13篇
  1992年   12篇
  1991年   7篇
  1990年   4篇
  1989年   3篇
  1988年   1篇
  1986年   1篇
  1984年   11篇
  1983年   8篇
  1935年   2篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
111.
陈嘉琛  马欣  马秋菊 《安全》2019,40(6):76-79
安全文化是企业文化的重要组成部分,有效的安全文化建设,对企业文化的管理和运行具有良好的促进作用。文章以海外核电某项目部的文化建设为例,以文化体系建设的安全文化管理模式、安全文化教育模式、安全文化检查模式、安全文化宣传模式、安全文化激励模式、安全文化科技模式、安全文化技能模式和安全文化专题模式来探讨海外核电某项目在安全文化建设的具体做法,为其他海外工程项目提供借鉴,不断提升企业软实力,提高中国核电走出去的安全管理水平。  相似文献   
112.
113.
114.
This study aimed at finding effective strategies for high-performance removal of reactive blue 19 (RB19) dye from aqueous solution. Chitosan (CS) films had been prepared by using solvent casting with mild drying for this purpose. The CS films were characterized by X-ray diffraction, field-emission scanning electron microscopy, and Fourier transform infrared (FTIR) spectroscopy. The performance of RB19 removal using CS were evaluated by varying contact time, solution pH, initial dye concentration, and adsorbent dosage. Adsorption isotherms, kinetics, and desorption were investigated by batch experiments. Results showed that CS films exhibited the optimal adsorption performance for RB19 removal and high maximum adsorption capacities of RB19, which were 799 and 822.4 mg g?1 at 20 and 40 °C, respectively. Adsorption kinetic data were well described by the pseudo-second-order kinetic model. FTIR analyses further indicated that interactions between RB19 and the CS film occurred during adsorption. The CS films also exhibited satisfactory desorption of RB19 at about 80 % after 30 min of desorption at pH 11. Our study demonstrated that the CS films can be easily prepared and applied for effective removal of RB19 in treatment of wastewater.  相似文献   
115.
The fifth meeting of INRA’s national network of ecotoxicologists took place on 25 to 27 November 2014 in Biarritz, France. The main aim of the meeting was to bring together ecotoxicologists from INRA and associated partners, providing them ample opportunity to share and discuss their latest scientific results as well as the national policy of research in ecotoxicology and to precise perspectives for the network.  相似文献   
116.
117.
118.
This study examines the relationship between national-level militarism and consumption-based carbon dioxide emissions. We analyze panel data from 1990 to 2010 for 81 nations to determine whether the magnitude of the effects of (1) military expenditures as percent of total gross domestic product and (2) military personnel as percent of total labor force on carbon emissions change over time. Results of two-way fixed effects models highlight the temporal stability of the environmental impacts of both national-level military characteristics. The findings also reveal that the effect of military expenditures on emissions is larger in the more developed OECD nations than in the developing non-OECD nations. Overall, the results support the treadmill of destruction perspective, which suggests that the nations’ militaries are an important social institution to consider in sustainability science research on the human drivers of global environmental change.  相似文献   
119.
120.
This study examines the relation between CO2 emissions, income, non-renewable, and renewable energy consumption in Algeria during the period extending from 1980 to 2011. Our work gives particular attention to the validity of environmental Kuznets curve (EKC) hypothesis. The autoregressive distributed lag (ARDL) with break point method outcome demonstrates the positive effect of non-renewable type of energy on CO2 emissions consumption. On the contrary, the results reveal an insignificant effect of renewable energy on environment improvement. Moreover, the results accept the existence of EKC hypothesis but the highest gross domestic product value in logarithm scale of our data is inferior to the estimated turning point. Consequently, policy-makers in Algeria should expand the ratio of renewable energy and should decrease the quota of non-renewable energy consumption.  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