全文获取类型
收费全文 | 1099篇 |
免费 | 60篇 |
国内免费 | 356篇 |
专业分类
安全科学 | 99篇 |
废物处理 | 71篇 |
环保管理 | 85篇 |
综合类 | 620篇 |
基础理论 | 190篇 |
污染及防治 | 332篇 |
评价与监测 | 36篇 |
社会与环境 | 38篇 |
灾害及防治 | 44篇 |
出版年
2024年 | 1篇 |
2023年 | 19篇 |
2022年 | 53篇 |
2021年 | 51篇 |
2020年 | 41篇 |
2019年 | 31篇 |
2018年 | 44篇 |
2017年 | 47篇 |
2016年 | 49篇 |
2015年 | 68篇 |
2014年 | 89篇 |
2013年 | 106篇 |
2012年 | 87篇 |
2011年 | 123篇 |
2010年 | 75篇 |
2009年 | 71篇 |
2008年 | 55篇 |
2007年 | 56篇 |
2006年 | 46篇 |
2005年 | 49篇 |
2004年 | 37篇 |
2003年 | 44篇 |
2002年 | 32篇 |
2001年 | 31篇 |
2000年 | 33篇 |
1999年 | 37篇 |
1998年 | 30篇 |
1997年 | 22篇 |
1996年 | 13篇 |
1995年 | 20篇 |
1994年 | 18篇 |
1993年 | 15篇 |
1992年 | 5篇 |
1991年 | 4篇 |
1990年 | 4篇 |
1989年 | 4篇 |
1988年 | 2篇 |
1987年 | 3篇 |
排序方式: 共有1515条查询结果,搜索用时 15 毫秒
231.
Stringent quarantine measures during the Coronavirus Disease 2019 (COVID-19) lockdown period (January 23, 2020 to March 15, 2020) have resulted in a distinct decrease in anthropogenic source emissions in North China Plain compared to the paralleled period of 2019. Particularly, 22.7% decrease in NO2 and 3.0% increase of O3 was observed in Tianjin, nonlinear relationship between O3 generation and NO2 implied that synergetic control of NOx and VOCs is needed. Deteriorating meteorological condition during the COVID-19 lockdown obscured the actual PM2.5 reduction. Fireworks transport in 2020 Spring Festival (SF) triggered regional haze pollution. PM2.5 during the COVID-19 lockdown only reduced by 5.6% in Tianjin. Here we used the dispersion coefficient to normalize the measured PM2.5 (DN-PM2.5), aiming to eliminate the adverse meteorological impact and roughly estimate the actual PM2.5 reduction, which reduced by 17.7% during the COVID-19 lockdown. In terms of PM2.5 chemical composition, significant NO3? increase was observed during the COVID-19 lockdown. However, as a tracer of atmospheric oxidation capacity, odd oxygen (Ox = NO2 + O3) was observed to reduce during the COVID-19 lockdown, whereas relative humidity (RH), specific humidity and aerosol liquid water content (ALWC) were observed with noticeable enhancement. Nitrogen oxidation rate (NOR) was observed to increase at higher specific humidity and ALWC, especially in the haze episode occurred during 2020SF, high air humidity and obvious nitrate generation was observed. Anomalously enhanced air humidity may response for the nitrate increase during the COVID-19 lockdown period. 相似文献
232.
为评价炼化装置中各控制回路的性能,基于控制回路关键品质指标要求,采用控制回路的设定值、输出值、测量值、控制模式等过程参数设计了准确性指标、稳定性指标及快速性指标等性能评估指标。辅助技术人员在线进行控制回路性能评估,识别性能较差的控制回路,诊断异常原因并进行优化,提高装置的自动化水平。 相似文献
233.
江苏油田生活污水生物处理技术述评 总被引:3,自引:1,他引:3
简介了生物处理生活污水的技术,对几种主要生物处理法进行了综合评价,并结合江苏油田生活污水生物处理的实践,综合分析了活性污泥法、生物转盘法、接触氧化法等三种主要生物处理技术,初步提出了中小规模生活污水处理场的设计标准,可供油田生活基地中小规模生活污水处理场设计时参考。 相似文献
234.
Xu Jiang Zhang Hong Ding Junjie Lu Yushen Mu Bin Wang Aiqin 《Journal of Polymers and the Environment》2022,30(6):2405-2418
Journal of Polymers and the Environment - Oil shale semi-coke (OSSC) is the residual solid waste after refining of oil shale, which principally contains organic matter and minerals. The common... 相似文献
235.
Yuan Jie Ding Shuang Li Huijin 《Journal of Material Cycles and Waste Management》2022,24(6):2608-2619
Journal of Material Cycles and Waste Management - Spent cathode carbon (SCC), with high recycling potential of carbon, is an unavoidable solid waste in the aluminum electrolysis industry. In this... 相似文献
236.
Guo Xianwei Song Qiuxia Wang Hao Li Ning Su Wanying Liang Mingming Sun Chenyu Ding Xiuxiu Liang Qiwei Sun Yehuan 《Environmental science and pollution research international》2022,29(24):35707-35722
Environmental Science and Pollution Research - Although a growing number of original epidemiological studies imply a link between ambient pollution exposure and mortality risk, the findings... 相似文献
237.
Xiong Guobao Deng Junhong Ding Baogen 《Environmental science and pollution research international》2022,29(31):47082-47093
Environmental Science and Pollution Research - By revealing the temporal and spatial differentiation of China’s regional tourism carbon emissions and its decoupling relationship with tourism... 相似文献
238.
Zuo Xu Nie Jianxin Jiang Beier Jiang Aijun Zou Shiyang Wu Junrong Ding Bingquan Wang Xue hui Liu Yang 《Environmental science and pollution research international》2022,29(50):75597-75608
Environmental Science and Pollution Research - Advanced oxidation processes (AOPs) are efficient methods for water purification. However, there are few studies on using peroxymonosulfate (PMS) to... 相似文献
239.
Zhu Tianshun Wang Lihong Ding Xin Wen Zihao He Liang Chen Jing Yang Yang Liu Zugen Chen Jianfeng Zhang Meng 《Environmental science and pollution research international》2022,29(44):66413-66421
Environmental Science and Pollution Research - Turions production is the dominant means of propagation in Potamogeton crispus L. To understand how parental population and their living environmental... 相似文献
240.
Ding Wei Chen Hong Chang Han Wang Yupeng Zhou Dian Feng Wei 《Environmental science and pollution research international》2022,29(54):81468-81480
Environmental Science and Pollution Research - Multirotor UAVs (unmanned aerial vehicles) have been widely used in urban vertical wind environment testing, whereas less attention has been given to... 相似文献