全文获取类型
收费全文 | 71篇 |
免费 | 1篇 |
国内免费 | 4篇 |
专业分类
安全科学 | 2篇 |
废物处理 | 7篇 |
环保管理 | 5篇 |
综合类 | 9篇 |
基础理论 | 12篇 |
污染及防治 | 27篇 |
评价与监测 | 8篇 |
社会与环境 | 6篇 |
出版年
2023年 | 1篇 |
2022年 | 7篇 |
2021年 | 10篇 |
2020年 | 2篇 |
2019年 | 6篇 |
2018年 | 2篇 |
2017年 | 6篇 |
2016年 | 3篇 |
2015年 | 6篇 |
2013年 | 1篇 |
2012年 | 6篇 |
2011年 | 1篇 |
2010年 | 2篇 |
2009年 | 2篇 |
2008年 | 3篇 |
2006年 | 2篇 |
2005年 | 2篇 |
2004年 | 2篇 |
2003年 | 1篇 |
2002年 | 5篇 |
2001年 | 1篇 |
2000年 | 1篇 |
1994年 | 1篇 |
1988年 | 1篇 |
1985年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有76条查询结果,搜索用时 15 毫秒
71.
Pham Van Khang Xuan Truong Mai Hiep Hoang Phu Sy Danh Thuong Shen Sida 《毒物与环境化学》2020,102(1-4):124-131
AbstractIn this study, The essential oil of flowers, fruits, and leaves of Thevetia peruviana, which were collected in Vietnam, were being reported for the first time. The essential oil of flowers was extracted by different methods: n-hexane extraction, distillation water, and supercritical CO2 extraction. The compositions of essential oil of different parts of Thevetia peruviana were analyzed by GC-FID and GC/MS systems. Major chemical compositions of essential oil were identified as monoterpenes, sesquiterpenes, terpenoids, and sterol. The activities of total essential oil extracts of the Thevetia peruviana exhibit inhibitory activities against five cancer cell lines. 相似文献
72.
73.
针对紫外-可见光谱法检测水质COD预测模型的精度低和收敛速度慢等问题,研究了一种基于粒子群算法联合最小二乘支持向量机(PSO_LSSVM)的水质检测COD预测模型优化方法,并引入主元分析(PCA)算法对模型输入光谱数据进行降维预处理,借以提高模型的收敛速度.结果表明,利用粒子群(PSO)算法收敛速度快和全局优化能力,优化了最小二乘支持向量机(LSSVM)模型的惩罚因子和核函数参数,避免了人为选择参数的盲目性,克服了传统LSSVM预测模型的精度较低、稳健性较差等缺点.通过以收敛时间、预测平均相对误差(MRE)和均方根误差(RMSE)为评价标准进行评估,输入样本经过PCA降维预处理的PSO_LSSVM模型的预测能力和输入样本未经过降维预处理的LSSVM模型与PSO_LSSVM模型进行了比较分析,输入样本经过PCA降维预处理的PSO_LSSVM模型预测效果最优,且此算法使用C语言实现,易于移植,这为紫外-可见光谱水质COD在线、实时性检测奠定了基础. 相似文献
74.
Saikat Sinha Ray Shiao-Shing Chen Dhanaraj Sangeetha Hau-Ming Chang Cao Ngoc Dan Thanh Quang Huy Le Hong-Ming Ku 《Environmental Chemistry Letters》2018,16(4):1247-1265
Membrane technology has become a common separation technology over the past decennia. Membranes are used more and more for the production of drinkable water from groundwater, surface water and wastewater. Membranes are now competitive versus conventional techniques. Desalination is predominantly used to eradicate the problem of water scarcity. The sustainability of all desalination processes depends mainly on the reduction of energy costs (production cost) and the increase in water recovery. Forward osmosis and membrane distillation are emerging technologies for sustainable desalination. Here we review membrane processes of forward osmosis and membrane distillation and the advancements in membrane material and modules. We also discuss the capability of membrane distillation in treating highly concentrated aqueous solutions derived from other desalination processes. Furthermore, the advancements in fabrication of high-performance membrane is reviewed and the performance of different membranes and optimization of membrane distillation process are summarized. 相似文献
75.
Veettil Bijeesh Kozhikkodan Xuan Quang Ngo 《Environmental science and pollution research international》2022,29(49):73934-73934
Environmental Science and Pollution Research - 相似文献
76.
Truong Dai Quyet Loganathan Paripurnanda Tran Le Minh Vu Duc Loi Nguyen Tien Vinh Vigneswaran Saravanamuthu Naidu Gayathri 《Environmental science and pollution research international》2022,29(12):16959-16972
Environmental Science and Pollution Research - Ammonium removal from drinking water to protect human and environmental health is one of the major global concerns. This study evaluates the... 相似文献