辽宁地区一次暴雨过程成因的位涡诊断分析

2003年8月5—6日，受东移北上的华北气旋的影响，辽宁省大部分地区出现暴雨天气，其中彰武、本溪等地出现局地大暴雨。应用MM5非静力中尺度模式对这次暴雨过程进行了数值模拟，在模拟结果的基础上，利用位涡分析方法对这次过程进行了诊断分析。结果表明，在对流层低层有正位涡扰动存在，对强对流天气具有触发作用；对流层中低层的相对高位涡中心和对流层高层的较强低位涡中心相配合，有利于形成低层辐合与高层辐散，使得气旋得以维持和发展，从而为对流性降水提供了必要条件；在对流层中低层，出现高位涡中心地区可能形成暴雨中心。     

旋风除尘器的压力损失及减阻措施

通过探讨引起旋风除尘器阻力损失的原因，提出了相应的减阻措施－安装导向板和内筒。     

智能化海洋油污快速清除系统研究

目前油轮泄漏时,清除海面油污比较困难,如采用以往的方法速度慢,污染得不到及时治理,为了快速清除海面油污,保护海洋的清洁卫生,本文对智能化油污快速清除系统进行了研究。此系统是在油污吸取器上方安装有一个高分辨率的摄像头对海面油污进行识别,经图像处理后获取数据,再由单片机来控制储油船前方的油污收集器在运动中收集油污,经软管输送到油泵,把油污抽到储油船上的油水分离器,进行油水分离。这种清除油污方法比普通清除油污方法工效高、清除干净、污染少,因此可用于清除大面积海面油污染。     

Using cluster analysis to explore mortality patterns associated with tropical cyclones

Understanding the circumstances and conditions surrounding disaster‐attributed deaths may contribute to designing and implementing emergency preparedness and response programmes. This paper introduces a three‐step cluster analysis of multiple binary variables to investigate mortality patterns related to tropical cyclones. It is designed to overcome the difficulties of performing cluster analysis in a disaster database that is composed in part of nominal variables and is unavoidably incomplete owing to missing information. The first step in the process codes all variables as binary data in order to accommodate the nominal variables. The second step calculates Spearman's rank correlation coefficients for pairs of variables. And the third step subjects the correlation coefficients to cluster analysis. Data related to 1,575 deaths attributed to tropical cyclones (also known as typhoons) that struck Taiwan between 2000 and 2015 are used to illustrate the method. The results yield two distinct groups of variables that are worthy of further exploration.     

Cyclone shelters and their locational suitability: an empirical analysis from coastal Bangladesh

Bangladesh is one of the poorest and the most disaster‐prone countries in Asia; it is important, therefore, to know how its disaster reduction strategies are organised and planned. Cyclone shelters comprise a widely acceptable form of infrastructural support for disaster management in Bangladesh. This paper attempts to analyse empirically their use during cyclones in a sample study area along the southwest coastal belt of the country. It shows how the location of a cyclone shelter can determine the social power structure in coastal Bangladesh. The results reveal that the establishment of cyclone shelters in the studied communities is determined by neither a right‐based nor a demand‐based planning approach; rather, their creation is dependent on the socio‐political affluence of local‐level decision‐makers. The paper goes on to demonstrate that socially vulnerable households (defined, for example, by income or housing conditions) are afforded disproportionately less access to cyclone shelters as compared to less socially vulnerable households.     

UASB-曝气法应用于饮料废水中出现的问题及分析

UASB-曝气法应用在饮料废水处理的前期运行良好,但运行后期出现了出水不达标的异常现象,通过运行数据和UASB常见问题的分析,发现使系统出现异常的原因是UASB反应器内部腐蚀、三相分离器不完善等的常见问题。针对这些问题提出了相应的解决措施和二次启动厌氧池的建议,以使该系统恢复运行效果。     

旋风除尘器压力损失的试验研究

分析了旋风除尘器压力损失的成因,通过系统的试验考查了压力损失与进口气流平均速度的关系,探讨了粉尘含量对旋风除尘器压力损失的影响和灰斗的压力分布,总结了排气芯管截面积与入口截面积 A0/Ai之比的大小对除尘器压力损失的影响,从而为旋风除尘器的优化设计及操作性能的改善提供了重要的参考价值。     

XJF型旋风除尘器的研究

XJF旋风除尘器 ,其独特之处是增设并改进了减阻圆锥排出芯管和反射屏装置 ,经当地环保及卫生部门检测 ,用数据证明其性能超过在使用的其他旋风除尘净化器 ,其节能及除尘净化效果受到使用单位的好评     

车用柴油机微粒排放及旋流分离净化技术

车用柴油机排气中的微粒是一种十分有害的大气污染物,如何有效地净化它一直是人们密切关注的课题。介绍了一种旋流分离净化技术,以及应用此技术首先应解决的问题。     

直筒型导叶直流式三相旋流器排气管上部内流场的实验研究

使用五孔球探针对一种用于分离锅炉净化烟气中含尘液滴的直筒型导叶直流式三相旋流器排气管上部的气相流场进行了实验测定。得到了这一区域的速度和静压分布。发现了排气管上部筒体中心存在强烈的内旋流;外层气体不断汇入内旋流,内旋流呈轴向加速运动;绝大部分气体不经过排气管外环形空间下行直接由排气管排出。主体段切向速度为Rankine组合涡。