居住建筑室外风环境模拟研究

本文对居住建筑室外风环境进行了模拟研究。模拟分析了行列式布局下建筑群室外风环境状况。为建筑群布局提供了应用参考,也为进一步研究行列式布局等常见居住建筑群布局下的室外风环境状况提供了相应的研究基础。     

平面布局对建筑群体风环境的影响模拟研究

目前一些住宅建筑群在布局规划对室外风环境考虑欠缺,导致建筑群的风环境状况不理想,以致影响建筑室内通风。这种情况既不利于建筑节能,也影响了居住建筑的健康性和舒适性。对并列式、错列式、斜列式和周边式四种布局下建筑群的风环境进行了模拟,探讨了人行高度(1.5 m)处流场25个代表性测点的风速、建筑群周边150 m×200 m区域的平均速度、最大速度等在不同参数情况下的数值,得出各布局的建筑群流场风环境规律。从获得良好风环境的角度,为建筑群的布局规划提出建议。     

亚热带建筑室外风环境CFD模拟分析

为了研究亚热带气候条件下建筑群的室外风环境,以广州地区自然气候条件为基础,以可压缩空气为研究对象,建立了不同布局建筑群的物理和数学模型,并应用CFX软件模拟了建筑群的室外稳态湍流流场,结合得到的速度场、压强场和WBGT值,分析比较了不同布局建筑群的室外风环境,得到了最大风速区域和涡旋产生区域,确定了最佳的建筑布局,并对风环境恶劣的区域提出了改善措施．     

关中平原村落空间形态与风环境关系研究——以渭南市蒲城县许家庄村为例

良好的风环境对改善空气质量和提升居住环境品质有着十分重要的作用。本研究选取关中平原代表村落进行冬夏季风环境测试,以期揭示关中平原村落的风环境特征及存在的问题,并进一步提出改善的策略,使村落室外风环境有利于驱散雾霾与污染物,以期提升人们对于村落室外风环境的关注度,为关中平原村落风环境研究贡献微薄之力,为当地的村落规划提供参考。     

街区尺度建筑布局对通风性能的影响及评价方法研究

建筑布局是室外风环境的重要影响因素。为研究建筑布局对住宅小区室外风环境的影响,本文建立了9种典型布局的住区模型,通过各季节条件下的数值模拟,分析各个季节不同建筑布局的风环境特征,研究建筑布局对室外风环境的影响。为了量化空间形态对风环境影响,研究了室外风环境评价指标,并对已有指标"通风阻塞比"进行了修正及验证。为全面分析评价建筑室外风环境,提出全风向评价法,并对比分析了单风向(主导风向)与全风向(16风向)的评价结果的差异。     

基于CFD的住宅小区风环境研究

宅小区的平面布局对于小区内人行高度处的室外风环境有着重要的影响。通过对一个由12幢建筑物组成的建筑群,采用基于Reynolds时均化方程(RANS)和Renormalization group(RNG) k-ε湍流模型的数值模拟方法,得到小区的流场分布,以分析建筑群周围的风环境舒适性问题。改变相邻建筑物的左右距离和前后距离,比较不同布局下的风环境,获得了上述两个因素对于小区风环境的影响规律。     

不同建模区域下的建筑群风环境模拟探究

在进行室外风环境数值模拟时,建模区域合理的选取直接影响到建筑群室外风环境模拟结果,而目前不同标准存在不同的确定方法。本文以成都市某小区为例,探究区域范围大小对风环境模拟结果的影响,为建筑群室外风环境模拟计算区域的选取提供一定的参考价值。     

住宅布局对城市风能利用影响的数值模拟研究

以某住宅建筑群室外风速场研究为例,通过建立室外风场的数学和物理模型,应用专业CFD软件FLUENT,综合分析住宅建筑群两种行列式和错列式布局形式的室外风速分布情况和风能利用潜力。研究表明,建筑布局对风能分布有很大影响,行列式布局的楼间风大于错列式,而错列式布局的楼顶风能优于行列式。使用数值模拟方法对优化建筑布局来优化室外风环境和提高城市风能利用率有着显著的指导作用。     

基于风环境的布局模式及绿化形式研究综述

分析比较了近半个世纪以来国内外建筑风环境气流流动特性及数值预测方法的研究进展。重点对建筑布局、小区绿化及街区建筑群风效应的既有研究成果进行了对比分析,并对建筑风环境流场中常用若干湍流模型的适用性进行了讨论,总结了影响建筑风环境的诸多因素,为深入研究建筑风环境提供参考。     

CFD模拟优化商业公建项目室外风环境

建筑室外风环境的影响因素比较复杂,主要取决于城市的气象,以及建筑所处的周边环境、建筑布局、建筑结构形式等。通过数值软件对某商业公建项目建筑室外风环境仿真模拟,对模拟结果分析并优化建筑景观布局,从而改善建筑室外风环境质量,对商业公建项目的室外风环境的设计具有指导作用。     

浅析高速公路工程招投标中的最低评标价法

结合目前高速公路施工项目招投标活动的实际情况,阐述了最低评标价法的概念,归纳了其优点及存在问题,对完善最低评标价法提出几点策略,以期促进招标投标市场更加规范有序。     

Place-Making in Megaprojects in Melbourne

This article analyses state-led place-making practices in Melbourne. The two levels of government that influence planning in Melbourne make much of the city as ‘culturally vibrant’ and ‘creative’, and have incorporated creative city-inspired place-making principles into many layers of the planning system. An examination of the development of two mixed-use megaprojects in central Melbourne reveals however that ideals of culturally engaging public places, and indeed of creative landscapes for middle-class consumption, wither in the face of more basic imperatives for economic development. In these case studies the ‘creative city’, no matter how the idea is interpreted, has little traction either as a set of inclusive place-making principles or as a gentrification strategy. The article concludes that the creative city-inspired place-making objectives in the planning system at both state and local levels are ambiguous in their overall intents and completely unsupported by statutory controls. Such place-making objectives as are realised are the compromised results of the interplay of uncoordinated decisions, delivered at the pleasure of the developer.     

Pathogens in septage in Vietnam

Septage is widely acknowledged as a major source of infectious pathogens while disposal of septage, and the operation and maintenance of septic tanks, is not regulated in many developing countries. Twenty untreated septage and septage sludge samples were taken from Can Tho City, Vietnam to examine their pathogen content, and indicator micro-organisms. Escherichia coli and Enterococcus spp. were detected in all samples, regardless of sludge storage time. Phages were detected in 80% of samples. Salmonella spp. were detected in 70% of the untreated septage and 60% of septage sludge samples. Concentrations of phages and bacteria tested in septage sludge after many years of tank storage were much higher than the expected levels. Helminth ova were present in 95% of untreated septage samples with an average of 450 ova l^− 1, and were detected in all septage sludge samples with an average of 16,000 ova l^− 1. Twelve varieties of helminth ova were identified. More helminth ova varieties in higher concentrations were found in septage than those reported from stool samples. The varieties' frequency ranged from 10% to 50% and Ascaris lumbricoides predominated. Results show that pathogens and indicator micro-organisms, especially helminth ova, accumulate in sludge. Thus helminth ova should be considered when septage sludge is treated and used for agriculture. Proper health protection measures must be applied for people handling septage.     

在市场中实践在实践中学习在学习中进步--工程公司市场化进程的回顾与展望

近两年来，工程公司在提高市场竞争意识、推动市场化进程中做了大量工作，其中坚持走出去的方针是我们自我加压、推行加快市场化步伐的一个重要战略步骤。     

新时期广东城市化的新特点

新时期广东城市化出现以下特点:知识源导向、城市由单体向群体化发展、产业集群推动、政府主导自上而下的集约化发展、城镇化向城市化转变、由重“数量”发展向重“质量”发展的转变。     

新形势下高校强化基建财务管理的探讨

在市场条件下高校基建财务人员在加强日常财务管理的同时,必须树立起高度的工作责任心,抓好事前监督、事中监督、事后监督三个环节,全面理解、贯彻执行《高等学校财务制度》,管好用好各项基本建设资金,提高基建财务管理水平,更好地完成高校各项基建任务,以有限的投资,最快的建设速度,获得最大的投资效益。     

2005年北京办公物业市场七大趋势

趋势一:CBD区域写字楼集中放量从各区域规划方案上看,CBD区域多数项目在03～04年处于项目的报批手续及拆阶段,预计2005年正式推向市场,因此2005年CBD区域将成为北京市场供应集中的域,区域即将供应的项目有北京财富中心(二期)、金地国际花园、万达广场、SOHO尚都、万通中心、世纪财富中心、怡禾国际中心、光华国际等。除去未知项目,2005CBD写字楼办公面积的供应量为60万平方米左右。中关村区域经过一段时间的集中供后开始逐步放缓,2005年供应的体量相对较大的项目有中关村金融中心、新中关。金街区域可能开盘的项目只有2个:英蓝国际中…     

浅谈我国工程项目建设成本控制存在的问题

结合目前我国施工企业工程项目成本管理现状,对工程项目成本管理过程中存在的问题进行了较详细的分析,并提出了一些解决问题的办法,以做好项目成本控制工作,进而增强企业经济实力。     

Variation in property taxation in Tulsa

Conclusions It may be reasonably concluded from this study that the range of variation in these ratios of assessed to actual value are of a reasonable size for the great majority of cases. The frequency distribution of these sample ratios was not normal, however, as was assumed a process of this type would produce. On the other hand, the failure of the regression analysis to identify any significant variables which would explain these variations would tend to re-enforce the assumption that the fluctuations were indeed of a random nature.To sum it up in one paragraph, aside from a few extreme cases, the assessing process appears to give estimates which are more consistent than would be expected under the assumption that any errors would be of a random nature, but the regression analysis was unable to isolate any particular socioeconomic characteristics which would explain the variation which was present.Financial support for this research project was furnished by the University of Tulsa.