污染源在线监控数据异常智能检测方法研究

污染源自动监测数据中存在大量异常数据,严重影响数据整体质量。建立科学可靠的自动监测数据诊断分析处理方法,可有效提升在线监控监管能力水平,为数据的深度应用提供支持。但目前尚缺乏对该方法的深入研究。因此,综述了数据挖掘领域主流异常数据检测方法,并总结了在电力、交通、金融、航天等领域的应用情况,指出存在的不足和发展方向,旨在为智能污染源自动监控数据异常检测提供指导,促进污染源自动监控系统发展。     

Drought monitoring in arid and semi-arid region based on multi-satellite datasets in northwest,China

Environmental Science and Pollution Research - Drought is a complex natural disaster affected by multiple climate factors and underlying surface. In recent years, drought monitoring indices of...     

A comparative bibliometric analysis of Chinese and foreign articles in environmental footprint family (EFF) research

Environmental Science and Pollution Research - Research on environmental footprint family (EFF), including these studies of environmental footprints and footprint family, has been widely applied to...     

烤鳗废油的利用现状及其开发展望

本文对鳗鱼油的利用价值和利用现状进行了评价和回顾，提出了烤鳗废油利用中亟需解决的几个技术问题，并对烤鳗废油利用的开发前景进行了展望。     

Chromosomal and subchromosomal anomalies associated to small for gestational age fetuses with no additional structural anomalies

Objectives: To assess the chromosomal and subchromosomal anomalies in small for gestational age (SGA) fetuses with no additional structural anomalies and their clinical outcomes. Methods: This study retrospectively reviewed the 128 SGA fetuses with no additional anomalies and underwent genetic testing with karyotyping and chromosomal microarray analysis (CMA). Stratified analysis was performed according to the existence of maternal risk factors for SGA (yes or no), gestational age at onset (before or after 32 weeks), presence of oligohydraminos (yes or no), and umbilical artery Doppler flow (normal or abnormal). Results: Chromosomal anomalies were identified in 6 (4.7%) SGA fetuses and pathogenic subchromosomal anomalies in 4 (3.1%) by microarray analysis. Chromosomal and subchromosomal anomalies were more frequently observed in cases with oligohydraminos (P = .017) and with early-onset SGA (P = .042). No differences were observed in relation to the existence of maternal risk factors and abnormal umbilical artery Doppler flow. Overall survival rate was 75.0% with different rates in the early and the late onset group (P < .001). Conclusions: There is a 3.3% incremental yield of subchromosomal anomalies in CMA above karyotyping in SGA fetuses. Chromosomal microarray analysis is recommended in SGA fetuses with no additional structural anomalies, especially coexisting with oligohydraminos and being early onset.     

用废铝渣制备聚合硫酸铝

将铝材厂前处理过程产生的废铝渣用硫酸溶解,然后加入有机添加剂等进行聚合反应,制备新型水处理剂——聚合硫酸铝（PAS）。用PAS与聚合氯化铝（PAC）进行絮凝对比实验,结果表明,对于硅藻土浊度水、水源水和工业废水等,PAS比PAC具有更优异的除浊、脱色、去除COD和悬浮物的效果。该工艺既可回收利用废铝渣,又可省去废渣处置费用,为废铝渣的综合利用提供了实用技术。     

阻燃剂废水的处理及回收利用

采用电化学氧化、电气浮与Fenton强氧化性协同作用的电解Fenton法预处理难降解阻燃剂废水(CODCr=17108mg/L),CODCr去除率达98.34%,色度去除率达74.19%。其适宜操作条件是:pH=2.0～2.6;电流密度10.8～14.3A/dm2;H2O2起始摩尔浓度27～42mmol/L;FeSO4起始质量浓度660～990mg/L;电解5h。处理后取废水50mL,HCl(1∶1)67mL,NaAlO230g,FeCl3·6H2O4g,加热回流反应2h制成聚合氯化铝铁无机高分子絮凝剂(Al2O39.93%、Fe2O30.75%、盐基度68.0%左右)。该絮凝剂在pH=7～9时有良好的絮凝效果。     

我国城市生活垃圾处理的发展趋势

本文综述了我国城市生活垃圾的常规处理方法,根据垃圾处理的无害化、减量化、资源化原则,分析了在垃圾处理过程中存在的主要问题,并论述了垃圾处理的发展趋势。