Results 101 to 110 of about 1,969 (156)

Estimation of COD discharge from non-point pollution into Luoyuan Bay

, 2006
根据汇水流向,借助GIS进行罗源湾汇水区的划分;在ENVI软件下利用遥感分析技术提取土地利用类型;结合研究区域内主要溪流的水质监测结果和土地利用现状,利用反推法计算出农田污染单位面积COD负荷.在此基础上,采用排污系数法和单位面积污染负荷法分别计算出各汇水区农村生活污水、畜禽养殖、农田和村镇建设用地降雨径流的COD排放量.结果表明罗源湾入海非点源污染COD总排量为11 446.44 t/a,其中农村生活污水的COD排放量最大,约占38.9%,其次是畜禽养殖、农田和村镇建设用地降雨径流污染 ...
余兴光, 刘希, 林志兰, 陈彬
core  

[Determination of 26 herbicide residues in soil， sediment， and surface water samples using modified QuEChERS method combined with ultra-high performance liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu
Zhao L, Ma L, Huang LQ, Chen JB, Zhu WF.
europepmc   +1 more source

优化养殖水域生态系统结构的若干途径 [PDF]

, 1997
杨圣云, 许振祖
core  

输电线路复合绝缘子污秽发热影响因素分析

Dianci bileiqi
污秽发热是现场复合绝缘子检修、处置关注的问题。为获取复合绝缘子污秽发热特征及随外界环境的变化规律，在人工气候室对等值盐密为0.08 mg/cm2和0.12 mg/cm2的人工污秽复合绝缘子开展不同环境湿度和风速下的工频耐压红外测试，此外考虑泄漏电流热效应和外部散热环境，建立复合绝缘子表面积污发热仿真计算模型，计算不同污层介电常数、污层电导率、环境风速下的绝缘子发热情况。结果表明，低湿度下积污复合绝缘子仅在高压端部存在发热，高湿度下绝缘子高压侧、中部、低压侧区域均可出现发热，温差随着湿度增加成加速上述趋势。
王少华, 李泽宇, 张永, 李特, 马勋, 何坚   +5 more
doaj   +2 more sources

[Diagnostic Performance of Metagenomic Next-Generation Sequencing for Mucormycosis: A Retrospective Cohort Study]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Zhang W, Zhong S, Lu S, Xiao X, Xie Y.
europepmc   +1 more source

[Determination of atmospheric intermediate volatility organic compounds with thermal desorption-flow modulator comprehensive two-dimensional gas chromatography- time-of-flight mass spectrometry]. [PDF]

Se Pu
Wang R, Li YJ, Wang JH, Ma CW, Jiang JK.
europepmc   +1 more source

[Determination of eight ultraviolet absorbers in surface water and wastewater by ultra performance liquid chromatography-triple quadrupole mass spectrometry]. [PDF]

Se Pu
Sun HJ, Zhang BB, Huang MQ, Wang H, Hu GJ, Chen HM.   +5 more
europepmc   +1 more source

[Determination of 51 per- and polyfluoroalkyl substances in raw water and drinking water by online solid-phase extraction coupled with ultra performance liquid chromatography- tandem mass spectrometry]. [PDF]

Se Pu
Chen YY, Lyu J, Ye BX, Zhang L, Wang YY, Jin N.   +5 more
europepmc   +1 more source

[Undergraduate innovation training experiment： zooarchaeology by mass spectrometry for species identification of paleontological remnants]. [PDF]

Se Pu
Xu Y, Jiang LY, Yang SS.
europepmc   +1 more source

[Association Study of Parity With Adverse Pregnancy Outcomes]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Yao J, Guo X, Dong X.
europepmc   +1 more source