工业企业厂界环境噪声监测中背景噪声监测及修正探讨

针对测量结果修正的相关要求,本文对新颁布的《工业企业厂界环境噪声排放标准》（GB12348-2008）和旧标准《工业企业厂界噪声测量方法》（GB／T12349-1990）在实际工作中的运用进行了比对、分析和探讨,并根据实际工作经验,提出了在背景噪声难以测量的一些特殊情况下的几种解决途径,主要提出噪声源声值与背景声值相差小于3dB（A）时的解决方案。     

微波无极紫外光催化-内电解协同降解活性艳红X-3B

采用微波无极紫外光源,以活性炭作为光催化剂TiO2的载体,与外加铁屑构成内电解反应,处理活性艳红X-3B模拟废水.实验结果表明,微波无极紫外光催化-内电解法对活性艳红X-3B的降解速率是微波无极紫外光催化和微波-内电解法单独作用时降解速率之和的2倍.在活性艳红X-3B模拟废水初始pH为7、空气曝气量为0.50 L/min、铁屑加入量为5 g/L、反应温度为40～45℃的最佳条件下,微波无极紫外光催化-内电解法的活性艳红X-3B模拟废水色度去除率达100%,TOC和可吸附有机卤化物的去除率分别为69.5%和81.8%.     

基于知识推理的发电企业设备风险管理应用研究

基于发电企业设备自身的特点及工作人员对风险知识认知的局限性,有必要分析发电企业设备在运行、检修中潜在的风险.分析了设备风险知识与风险管理的关系,并以发电企业各类大型设备中应用最广泛的电动机为例,解决了电动机风险知识的表达及推理问题,为实现基于知识的设备风险管理提供了一种思路,对指导发电企业的设备日常维护、巡检以及状态监测、避免不必要的损失有着积极的意义.     

聚硅酸铝铁的合成及絮凝性能研究

以水玻璃、硫酸铝和硫酸铁为原料合成了聚硅酸铝铁,考察了硅酸活化pH值、(Al+Fe)/Si摩尔比、Al/Fe摩尔比、加入量、水样初始pH值等因素对PSAF絮凝性能的影响.PSAF的絮凝效果明显优于聚合氯化铝和硫酸铝,是一种新型无机高分子絮凝剂.     

Physiological and biochemical responses to high Mn concentrations in two contrasting Populus cathayana populations

We exposed the cuttings of Populus cathayana to Hoagland's solution containing four different manganese (Mn) concentrations (0, 0.1, 0.5 and 1mM) in a greenhouse to characterize the physiological and biochemical basis of Mn resistance in woody plants. Two contrasting populations of P. cathayana were used in our study, which were from the wet and dry climate regions in western China, respectively. The results showed that Mn treatments significantly decreased chlorophyll content and growth characteristics, including shoot height, basal diameter, biomass accumulation and total leaf area in the two populations. Mn treatments also significantly increased the levels of abscisic acid (ABA), polyamines and free amino acids especially proline (Pro), histidine (His) and phenylalanine (Phe) available for cellular signaling and heavy metal chelation. In addition, high Mn concentrations also caused oxidative stress indicated as the accumulation of hydrogen peroxide (H(2)O(2)) and malondialdehyde (MDA) contents. On the other hand, there were different responses to Mn stress between the two contrasting populations. Compared with the dry climate population, the wet climate population accumulated more Mn in plant tissues especially in leaves; it showed lower tolerance index and more pronounced decrease in growth and chlorophyll contents. The wet climate population not only accumulated less ABA, putrescine and free amino acids, but also exhibited lower activities of superoxide dismutase (SOD) and ascorbate peroxidase (APX), thus suffering from more serious oxidative damage. Therefore, our results showed that the wet climate population was more susceptible to Mn stress than the dry climate population.     

Decolorization of cationic red X-GRL by wet air oxidation: performance optimization and degradation mechanism

The decolorization of a strong colored azo dye solution of cationic red X-GRL was investigated by wet air oxidation under relatively mild conditions (60-180 degrees C, PO2 = 0-1.2 MPa). Mono-factor experiments were carried out to investigate the effect of the operation factors and the relatively important parameters were selected for optimization using response surface methodology to explore the interactions of these relatively important parameters. Model regeneration analysis and the check experiments showed that the data of the general linear model agreed with the experiment results well. With multistage Monte-Carlo optimization, the best region of these variables could be predicted to dye color removal. At typical operational conditions, the intermediates of dye degradation were detected and confirmed by GC/MS system. Considering the intermediates and the structure analysis with the help of Gaussian 03W (version 6.0) and the theory of dye color, a possible degradation mechanism for the wet air oxidation of cationic red X-GRL was discussed and the probable degradation pathway was deduced.     

油气集输站安全监控预警及管理信息系统的开发

提出油气集输站安全监控预警及管理信息系统建设的调研内容、需求分析以及安全相关控制系统的风险分析流程。设计了该系统建设的4层结构框架和拓扑图,深入研究了实时参数监控、分级报警与安全保护控制、智能诊断与预警、多媒体监控、安全生产管理信息子系统的主要开发内容和功能实现。     

高墩大跨连续刚构桥施工期安全评价

针对高墩大跨连续刚构桥施工期结构概率失效的特性,提出了基于失效概率的安全评价方法.以徐水沟特大桥为工程背景,通过风险评定识别出施工最不利阶段--最大双悬臂时的主要风险因素即:节段特性模量的不确定性、梁体自重的不确定性以及预应力损失的不确定性.采用大型通用有限元程序ANSYS及蒙特卡洛法,计算徐水沟特大桥在最大悬臂时的失效概率,并确定施工期的目标可靠度.依据高墩大跨连续刚构桥施工期结构概率失效的评价结果,提出相应的风险控制措施.     

基于临水区域化工园区的整体安全研究

针对临水区域化工园区的生产特点及在整体安全方面存在的普遍问题,提出在临水区域化工园区内要进行合理布局,做到功能分区明确;同时需建立园区安全生产管理、监测预警及应急处置系统,主要是由固定危险源和移动危险源动态安全管理子系统、安全生产监测预警系统、突发事故应急处置平台等所组成;坚持安全监控信息化与标准化,对化工园区的整体安全性的提高将发挥巨大的作用,为建设"平安园区"打下坚实的基础。     

三维脚型测量技术及方法的研究

本文阐述了人体脚型的测量方法及特点,比较后得出人工测量与三维扫描测量技术之间的差别。以YETI三维脚型扫描仪为模型,详细分析了脚型扫描仪的结构原理,摸索并提出了简单实用的测量方法,讨论了YETI三维脚型扫描仪获得的原始数据、脚型横截面以及脚型投影图的特点。