全文获取类型
收费全文 | 18940篇 |
免费 | 4902篇 |
国内免费 | 28181篇 |
专业分类
安全科学 | 1796篇 |
废物处理 | 789篇 |
环保管理 | 1598篇 |
综合类 | 33540篇 |
基础理论 | 3613篇 |
环境理论 | 4篇 |
污染及防治 | 7595篇 |
评价与监测 | 1799篇 |
社会与环境 | 535篇 |
灾害及防治 | 754篇 |
出版年
2024年 | 30篇 |
2023年 | 228篇 |
2022年 | 569篇 |
2021年 | 535篇 |
2020年 | 1038篇 |
2019年 | 2134篇 |
2018年 | 2387篇 |
2017年 | 2446篇 |
2016年 | 2170篇 |
2015年 | 2691篇 |
2014年 | 3400篇 |
2013年 | 3745篇 |
2012年 | 3490篇 |
2011年 | 3047篇 |
2010年 | 2727篇 |
2009年 | 2748篇 |
2008年 | 2429篇 |
2007年 | 2355篇 |
2006年 | 1828篇 |
2005年 | 1374篇 |
2004年 | 1198篇 |
2003年 | 1019篇 |
2002年 | 878篇 |
2001年 | 847篇 |
2000年 | 994篇 |
1999年 | 860篇 |
1998年 | 683篇 |
1997年 | 592篇 |
1996年 | 615篇 |
1995年 | 575篇 |
1994年 | 395篇 |
1993年 | 304篇 |
1992年 | 361篇 |
1991年 | 300篇 |
1990年 | 261篇 |
1989年 | 209篇 |
1988年 | 149篇 |
1987年 | 79篇 |
1986年 | 77篇 |
1985年 | 54篇 |
1984年 | 55篇 |
1983年 | 41篇 |
1982年 | 45篇 |
1981年 | 35篇 |
1979年 | 4篇 |
1978年 | 3篇 |
1977年 | 2篇 |
1974年 | 1篇 |
1972年 | 6篇 |
1971年 | 7篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Liu Shun Jia Xu Xin Long 《Environmental science and pollution research international》2021,28(16):20157-20173
Environmental Science and Pollution Research - The existing literature on the environmental Kuznets curve (EKC) fails to investigate the spatial attribute of the “pollution halo” effect... 相似文献
2.
Wang Chunbo Cai Qijia Li Yang Tian Cuicui Wu Xingqiang Huang Yuhong Xiao Bangding 《Environmental science and pollution research international》2021,28(31):42082-42092
Environmental Science and Pollution Research - A mechanical harvesting technology based on coupling flocculation with a rotary drum filter (RDF, 35-μm) was applied to remove cyanobacterial... 相似文献
3.
Huang Ying Jiang Qiongji Yu Xubiao Gan Huihui Zhu Xia Fan Siyi Su Yan Xu Zhirui He Cunrui 《Environmental science and pollution research international》2021,28(37):51251-51264
Environmental Science and Pollution Research - Trace copper ion (Cu(II)) in water and wastewater can trigger peroxymonosulfate (PMS) activation to oxidize organic compounds, but it only works under... 相似文献
4.
Yang Jian Hong Chen Xing Yi Zheng Zixuan Li Zaixing Zhao Xiumei Qi Chenhao 《Environmental science and pollution research international》2021,28(7):7621-7635
Environmental Science and Pollution Research - Hydrothermal liquefaction (HTL) of biomass used HTL reaction under high temperature and pressure to produce bio-oil. This technology is considered as... 相似文献
5.
Liu Qiang Xu Shengxia Lu Xiaoli 《Environmental science and pollution research international》2021,28(28):37231-37243
Environmental Science and Pollution Research - The impact of high concentrations of air pollution on COVID-19 has been a major air quality and life safety issue in recent studies. This study aimed... 相似文献
6.
Yan Mi He Lei Prabowo Bayu Fang Zhumin Lin Jie Xu Zhang Hu Yanjun 《Journal of Material Cycles and Waste Management》2018,20(3):1594-1604
Journal of Material Cycles and Waste Management - Efforts to improve the performance of hydrothermal treatment (HT) in producing high-quality solid fuel from sewage sludge were carried out by... 相似文献
7.
Chengyuan Gong Yi Yu Kaiqiang Wang Zhengkai Tu 《International Journal of Green Energy》2020,17(10):591-601
ABSTRACT In this study, a three-dimension (3D) computational model was proposed to investigate the flow and heat transfer characteristics of the intake grilles of two different fuel cell vehicles. The models of the intake grilles were constructed according to the actual sizes of two vehicles, namely, Roewe 950 and Toyota Mirai, considering the heat dissipation unit to simplify the heat transfer model of the vehicle. The results showed that relative to Roewe 950, Mirai intake air flow rate was approximately 10% higher, the heat transfer capacity was approximately 7% higher, and the intake grille area was larger. The coolant outlet temperature of Mirai was lower than that of Roewe 950, which was beneficial for the long term and stable operation of a fuel cell. This comparative study provided guidance for the intake grille and radiator design of fuel cell vehicles. The only difference between fuel cell vehicles on the market and conventional vehicles was that in the former, the internal combustion engine was replaced with a fuel cell stack, which had insufficient heat transfer capacity because of the reducing temperature difference. Increasing the intake grille area and the heat exchange capacity of the radiator were the key issues for the development of fuel cell vehicles. In this study, an optimal window opening angle of the radiator fin of 23° provided a maximal heat transfer coefficient. 相似文献
8.
Cao Li Li Lin Wu Yi 《Environmental science and pollution research international》2021,28(3):2765-2778
Environmental Science and Pollution Research - China is the most populous country in the world, and the pollution caused by the excessive population should not be underestimated. In recent years,... 相似文献
9.
A fragment constant QSAR model for evaluating the EC50 values of organic chemicals to Daphnia magna.
Shu Tao Xiaohuan Xi Fuliu Xu Bengang Li Jun Cao R Dawson 《Environmental pollution (Barking, Essex : 1987)》2002,116(1):57-64
The quantitative relationship between the median effective concentration (EC50) of organic chemicals to Daphnia magna and the number of molecular fragments was investigated based on experimental EC50 values for 217 chemicals derived from the literature. A fragment constant model was developed based on a multivariate linear regression between the number of fragments and the logarithmically transformed reciprocal values of EC50. Functional correction factors were introduced into the model. The model was verified using an independent set of randomly selected data. The mean residual of the final model was 0.4 log-units. The robustness of the model was discussed based on the results of three jackknife tests. 相似文献
10.
Wang Degang Huang Xiaoting 《中国人口.资源与环境(英文版)》2006,4(1):45-53
At present, internal rural tourism is at the stage of upgrading and renewing, and ecotourism has been considered to be the main direction. This paper discussed the concepts and criteria of rural tourism and ecotourism, analyzed a typical case of Nongke Village of Chengdu City-being considered to be the first rural tourism site in China, went deep into the problems of the contents and criteria of the development of rural ecotourism, and tried to probe into the principles of the development of rural ecotourism both theoretically and practically so as to understand the rules of the development of rural ecotourism . 相似文献