基于Pyrosim的宿舍楼火灾模拟分析

为研究不同火灾工况对宿舍楼火灾过程的影响,应用Pyrosim对某大学东六宿舍进行火灾动态模拟,对比分析了宿舍大楼所有门窗全开状态和着火房间窗户闭合、门在20 s后打开的状态下,宿舍楼各部分温度、烟气层高度、门窗热流量及烟气蔓延特点。Pyrosim模拟结果表明,在火灾爆发的前20 s内,火势发展与门窗开合状态无关。在火灾中后期,门窗全开状态下,着火房间的温度及热流量较低、烟气层离地的高度较高,着火房间上方的宿舍受烟气影响较为严重;而在着火房间窗户闭合、门在20 s后打开状态下,横向走廊及各层楼梯处受烟气影响较严重。     

水解(酸化)——生物接触氧化处理水产品加工废水

对水解(酸化)-生物接触氧化工艺处理水产品加工废水进行了试验研究,试验结果表明在水温20℃、总HRT＞6h、进水COD值1000～1300mg/l、BOD5值510～690mg/l、SS值150～300mg/l情况下,COD去除率大于89%,BOD5去除率大于92%,SS去除率大于89%,出水COD、B0D5、SS值均达到国家二级排放标准(GB8978-1996),最高有机容积去除负荷达3.9kgCOD/m3@d.水产品加工废水经水解(酸化)处理以后BOD5/COD值可由原水的0.52提高到出水的0.67,可生化性得到显著提高.     

面向对象板料成形有限元模拟软件的图形平台设计与实现

在板料成形有限元模拟软件系统中 ,图形平台是重要的组成部分。介绍了图形平台的设计与实现 ,并重点阐述了面向对象编程技术在软件开发中的实际应用 ,同时结合图形平台需要提供的功能 ,给出了图形平台各个类的继承关系和实现中的一些关键技术。实践表明 ,此平台具有较好的灵活性、可靠性和可扩展性     

干污泥高维填埋的堆体边坡稳定性模拟与分析

污泥高维填埋可以解决污泥产量剧增与填埋用地紧张的矛盾,但污泥混合高维填埋的边坡稳定性需进一步考证.本文以抗压强度和抗剪强度均较强的含水率60%左右的干污泥为研究对象,采用GEO-SLOPE软件对污泥高维填埋堆体稳定性进行模拟分析,发现填埋放坡坡度越缓,堆体稳定性越强,所允许的最大填埋高度相应越高,库容增加量越大;填埋高度越高,堆体稳定性越差;以上海老港填埋场为例,填埋单元的最佳放坡坡度为1：3.5,相应的最大允许填埋高度为28m,库容增加量为447.2万m³.     

基于SPSS软件分析上海市金山区地表水污染特征

运用SPSS统计分析软件全面分析2006-2010年上海市金山区26个地表水监测断面上的水质变化趋势过程,发现大部分断面超标污染物之间存在着高度相关性,且水质越差的监测断面上超标污染物指标间有显著意义相关性项目越多.在此基础上,根据研究样本基本满足因子分析要求的特点,进一步运用SPSS软件进行深入分析,并根据因子综合得分,对地表水域进行聚类,揭示出上海市金山区地表水超标污染物构成特征与水域分类.分类结果符合区域内河流污染分布实际,可作为环境管理部门实施水环境综合整治与水质规划管理的重要参考.     

Indirect forced solar drying of banana slices: phenomenological explanation of non-isotropic shrinkage and color changes kinetics

Solar drying technology is a noteworthy technique as it uses the renewable solar energy. In this study, thin slices of banana were dried by using an indirect forced solar dryer at air mass flow rates of 0.016, 0.041, and 0.082 kg s^?1. In order to assess the kinetics of shrinkage and color changes, image processing technique was applied for determining area, volume, density, total color difference and browning index. Shrinkage factor of the samples was less than 1 during drying indicating non-isotropic shrinkage with contraction of inner voids. Furthermore, product shrinkage showed two descending drying steps in which the volume change was more than the evaporated water volume in the first step and equal to that in the second step. The dimensionless evaporated water volume with respect to the dimensionless volume difference of the product also revealed that two steps of volume change existed during drying separated at critical moisture ratio 0.23. The area and volume changes were only related to the product moisture content and were independent of the air mass flow rate, and hence air temperature. In contrary to the browning index, the total color difference was not influenced by air mass flow rate and the least change in browning index occurred at mass flow rate of 0.041 kg s^?1.     

Predication of Fhhh potential in PTA wastewater treatment

Ebis is the intelligent environmental biotechnological informatics software developed for judging the effectiveness of the microorganism strain in the industrial wastewater treatment system(IWTS) at the optimal status. The parameter, as the objective function for the judgment, is the minimum reactor volume ( Vmin ) calculated by Ebis for microorganism required in wastewater treatment. The rationality and the universality of Ebis were demonstrated in the domestic sewage treatment system(DSTS) with the data published in US Aand China at first, then Fhhh strain‘s potential for treating the purified terephthalic acid(PTA) was proved. It suggests that Ebis would be useful and universal for predicating the technique effectiveness in both DSTS and IWTS.     

炼油企业含硫烃类废气吸收模拟与设计

研究了炼油企业含硫烃类废气的吸收试验效果,并采用pro／Ⅱ软件对其结果及吸收最优条件进行了模拟。结果表明,模拟结果与试验结果相吻合,在炼油企业,采用柴油吸收含硫烃类废气,在温度21℃,液气比50L／m^3,采用金属鲍尔环填料条件下,可使含硫烃类废气中烃类去除率大于95.2％,有机硫DMDS的去除率可达100％。     

基于SPSS的盐城自然保护区近海海域水质污染状况的分析

根据盐城自然保护区近海海域的监测数据,选取五大类代表指标,9个监测断面,运用SPSS统计软件对污染因子及主成分进行分析,研究主要污染因子的组合,并对相应污染源进行分析;通过聚类分析对近海海域的监测点及各监测点的污染数据进行分类,优化近海海域监测站点的分布,分析结果表明盐城自然保护区近海海域整体属于面源污染类型,但整个海域由北到南污染情况略有不同,海域北部偏重于化学污染类型,南部偏重于面源污染类型,分析的结论为该区域的环境监测及污染治理提供了重要的信息和依据.     

Characteristics for the hybrid cell Foaz obtained from the  protoplast fusion between yeast and photosynthetic bacteria in soybean processing wastewater

The optimal pH and temperature, maximum specific degradation rate, half rate constant and flocculation rate for the hybrid cell Foaz were measured in the reaction for the degradation of soybean processing wastewater(SPW) in this study. The optimal pH and temperature for Foaz in SPW were the same as those of its parental strains Saccharomyces cerevisiae Y9407 and Rhodobacter sphaeroides P9479, but the flocculation rate, the maximum specific degradation rate and the half rate constant for Foaz were higher than those of its parental strains. The results suggest that the characteristics of the inter kingdom fusant Foaz constructed from the protoplast fusion between the eukaryote cell yeast S.cerevisiae and the prokaryote cell photosynthetic bacteriaR. sphaeroides may favor degrading organic pollutant in SPW and removing biomass from the effluent.