含高可溶性盐油田废水中悬浮物的测定

实验研究了可溶性盐对滤纸过滤法测定水中悬浮物的干扰，讨论了蒸馏水洗涤法消除可溶性盐干扰的不足。提出用双滤法消除可溶性盐干扰，通过室内和现场试验证明很有效。该法不改变原有的测定条件，具有较高的准确度和精密度。     

在役压力容器声发射源严重度的多级模糊综合评定方法研究

根据国内外有关在役压力容器声发射检测评定标准、文献以及我们多年的检测和评定经验，利用模糊数学中的隶属度概念和多级模糊综合评价理论，在研究多种检测信息对评定结果影响程度的基础上，提出了声发射源严重度的多级模糊综合评定方法，并初步应用于大型球罐声发射检测评定，取得好的效果     

“十五”期间本溪市污染物分布规律及污染控制对策

本溪市环境质量“十五”与“九五”相比有了明显好转，本文就环境质量现状分布规律及变化因素进行了综合分析，并提出了进一步改善环境质量的对策。     

表面包覆聚合氯化铝吸附材料的制备与性能表征

在颗粒状黏土素瓷载体上 ,经灼烧制备具有共价结合的铝胶薄膜 ,并以此为载体 ,在聚合氯化铝形成过程中与氯化铝悬浊液共熟化 ,在铝胶薄膜表面生成聚合氯化铝 ,经灼烧进一步固化而制得表面包覆聚合氯化铝吸附材料。该吸附材料作为絮凝剂可循环使用约 17次。用于处理造纸污水 ,COD、BOD、悬浮物、硫化物、色度等指标可分别降低约 93%、77%、96 %、94 %和 80 %。     

确立生态价值观:人与自然和谐的关键

构建和谐社会包括人与自然、人与人、人与自身的和谐，但人与自然的和谐是构建和谐社会的基础。如何实现人与自然的和谐，必须确立生态何时何地观。全球性的生态危机，向我们提出一个问题：每一代人究竟应当怎样衡量自己创造的文明成就。又应当如何评价自己决策行为的功过得失。要回答这个问题．关键在于价值，在于价值的取向与判断标准。我们反思过去的经济行为。必须确立这样的价值观。就是自然资源是有价值的。这是实现人与自然的和谐的根本保证。     

The effect of helmets on motorcycle outcomes in a level I trauma center in Connecticut

Objective: The State of Connecticut has a partial motorcycle helmet law, which has been linked to one of the lowest helmet compliance rates in the Northeast. We examine the clinical and financial impact of low motorcycle helmet use in the State of Connecticut.

Methods: A retrospective cohort study comparing the outcomes between helmeted and nonhelmeted motorcycle crash victims over a 12.5-year period, from July 2, 2002, to December 31, 2013. All patients who were admitted to the hospital after a motorcycle crash were included in the study. Patients were stratified into helmeted and nonhelmeted cohorts. Group differences were compared using t-test or Wilcoxon rank test for continuous variables and chi-square test for dichotomous outcomes. Regression models were created to evaluate predictors of helmet use, alcohol and drugs as confounding variables, and factors that influenced hospital costs.

Results: The registry included 986 eligible patients. Of this group, 335 (34%) were helmeted and 651 (66%) were nonhelmeted. Overall, nonhelmeted patients had a worse clinical presentation, with lower Glasgow Coma Scale (GCS; P <.01), higher Injury Severity Score (ISS; P <.01), higher incidence of loss of consciousness (LOC; P <.01), longer intensive care unit (ICU; P <.01) admissions, and higher incidence of head (P <.01) or face injuries (P <.01). Nonhelmeted patients were also twice as more likely to die from their injuries (P =.04, odds ratio [OR] = 1.89, 95% confidence interval [CI], 1.02–3.45). Financially, nonhelmeted patients incurred mean hospital costs of $18,458, whereas helmeted patients incurred $14,970 (P =.18). ISS, GCS, and ICU length of stay were significantly correlated with increased hospital costs (P <.01). Not using a helmet was a significant predictor of mortality (P =.04) after adjusting for alcohol/drug use and age.

Conclusions: Helmet use is associated with lower injury severity and increased survival after a motorcycle crash. These outcomes remained consistent even after controlling for age and alcohol and drug use. The medical and financial impact of Connecticut's partial helmet law should be carefully evaluated to petition for increased education and enforcement of helmet use.     

石油加工业二氧化硫产排污系数验证研究——以济南某石化企业为例

确保主要行业主要污染物排放总量数据的准确性对制定总量减排和区域环境质量改善规划尤为重要.以济南某石化企业为例,对石油加工业常减压、催化裂化、延迟焦化、柴油加氢、硫磺回收等工艺二氧化硫产排污系数开展验证研究.将产排污系数与监测结果对比分析,发现该企业通过产排污系数计算的二氧化硫排放量远大于实际排放量.在此基础上,提出石油加工业二氧化硫产排污系数修订建议.     

Simulation of urban expansion patterns by integrating auto-logistic regression,Markov chain and cellular automata models

This research analyses urban expansion patterns and their eco-risks in the Poyang Lake region in China. A hybrid model consisting of auto-logistic regression, Markov chain and cellular automata (CA) is designed to improve the performance of the standard logistic regression model. An eco-risk assessment (ERA) index by integrating landscape fragmentation index and area weighted eco-service value index is established to promote the effectiveness for dynamically evaluating the environment and eco-security in watersheds. Scenario predictions are introduced to better understand the relationship between urban dynamics and their eco-risks. Three urban development scenarios such as historical development trend (HDT), environment protection priority (EPP) and goal-oriented restriction (GOR) are designed and transplanted into the CA model through the parameter self-modification method. The quantitative analysis results showed that in the period of the past five years, the urban growth primarily concentrated in the metropolitans. The simulations show that under the HDT scenario the urban growth will mainly emerge in the metropolitans, while under the EPP and GOR scenarios the urban growth will expand along with the metropolitans or the road networks and highways, respectively. Moreover, the ERA demonstrated that the GOR scenario was more effective in meeting the goal of environment protection and urban sustainable development for the study area.     

西安市夏末秋初PM_(2.5)中碳组分分析

2012年9月1日至30日利用大气气溶胶OC/EC在线分析仪在线分析了西安PM2.5中的OC、EC,并结合O3和紫外辐射数据(UV)进行了分析。结果表明:PM2.5、OC、EC、及O3的日均值分别为85.22,19.50,7.18,56.69μg/m3。PM2.5及其中OC、EC的日变化规律呈现"双峰"分布,OC、EC的日波动范围较PM2.5小,且OC的波动范围较EC大,OC、EC的相关性较高(R2=0.73)。PM2.5中TCA的平均比重为47.85%,是PM2.5的主要成分之一,TCA以OM为主,OM中SOC的平均比重高达54.76%,PM2.5中SOC的平均比重为21.25%,SOC和O3的相关性较高,表明研究期间西安市有机物光化学反应较重。1 d中10:00至19:00是PM2.5中SOC比重最高的时段且呈上升趋势,而PM2.5中TCA的变化规律则呈"W"型双峰分布。     

Flower-, wire-, and sheet-like MnO_2-deposited diatomites:Highly efficient absorbents for the removal of Cr(Ⅵ)

Flower-, wire-, and sheet-like MnO2-deposited diatomites have been prepared using a hydrothermal method with Mn(Ac)2, KMnO4and/or MnSO4 as Mn source and diatomite as support. Physical properties of the materials were characterized by means of numerous analytical techniques, and their behaviors in the adsorption of chromium(VI) were evaluated.It is shown that the MnO2-deposited diatomite samples with different morphologies possessed high surface areas and abundant surface hydroxyl groups(especially the wire-like MnO2/diatomite sample). The wire-like MnO2/diatomite sample showed the best performance in the removal of Cr(VI), giving the maximum Cr(VI) adsorption capacity of 101 mg/g.