A contaminated normal density is numerically approached by a variance variant normal distribution in which the variation of the variance of an observation is based on the observational residual.
本文试图从观测值残差入手，首先逼近各观测值方差，进而由方差的变化逼近污染正态分布密度。
Discussion on the pollution prevention and control for the shipyards in the Three Gorges Reservoir;
三峡库区水域修造船厂防污染管理探讨
The influence of environmental pollution in boron-industry worksite on element contents of male worker body fluid;
硼作业场所环境污染对男工体液元素含量的影响
Regional distribution of arsenic contained minerals and arsenic pollution in China;
中国主要含砷矿产资源的区域分布与砷污染问题
Analysis of fouling mechanisms of ceramic membranes in microfiltration of Raney nickel catalysts suspension;
陶瓷膜微滤骨架镍催化剂的膜污染机理分析
Study on crude oil fouling ion-exchange membranes and its mechanism;
原油对离子交换膜的污染及机理研究
Study on the fouling and cleaning for ceramic membrane in clarification of traditional Chinese medicine extract;
陶瓷膜澄清生地黄提取液的膜污染和清洗研究
Field survey and analysis of soil and rice samples were conducted to investigate arsenic pollution of paddy fields in 4 mining areas in southern Hunan, including Shizhuyuan lead-zinc ore (Chenzhou), Jiepailing stannary (Chenzhou), Shuikoushan non-ferrous metal ore(Hengyang) and Longwangshan gold mine(Hengyang).
通过实地调查以及土壤和水稻样品分析,研究了湘南郴州柿竹园铅锌矿、郴州界牌岭锡多金属矿、衡阳水口山有色金属矿、衡阳龙王山金矿4个矿区稻田的As污染状况。
Microbial Contamination of Eggshell and Egg Contents;
鸡蛋壳表面及蛋内容物的微生物污染情况分析
DDTs contamination around a pesticide plant in northern China;
华北某农药厂周边的滴滴涕污染状况初步研究
The Measure of Preventing the Water Environment in the City from Being Polluted by Human's Excrement;
浅谈人粪尿污染城市水环境的防治对策
The resin anion was polluted by iron and organic dirt.
阴离子交换树脂被铁和有机物重度污染 ,并混有少量阳离子交换树脂。
This paper studied the recovery of resin anion polluted by iron and organic dirt.
为了复苏被污染的阴离子交换树脂,首先按小试方案:(1)用粗盐水分离除去阴树脂中混杂的少量阳树脂;(2)用盐碱溶液浸泡以除去有机污物;(3)再用纯盐酸溶液浸泡以除去铁。