Ozone Synthesis and Decomposition in Oxygen-Fed Pulsed DBD System: Effect of Ozone Concentration,Power Density,and Residence Time

The process of ozone production in pure oxygen was studied. It was shown how the ozone concentration changes along the discharge gap, both during its generation and decomposition processes. The effect of ozone inlet concentration, power, and gas residence time on ozone concentration was analyzed. It has been shown that concentrated ozone is easily decomposed at very low discharge powers, i.e., when the increase of the average gas temperature in the gap is negligibly small. It was hypothesized that the most intense decomposition takes place in the microdischarge channels, because the process of gas heating in the gap begins inside them.     

城市老年住宅区的户外空间设计

随着社会的发展，对老年人住宅的需求日益增加。按老年人的生理、心理和社会特征，以人为本，人性化地设计老年人住宅区的户外空间，为老年人创造的不仅仅是环境优美的户外空间，更是处与丰富多彩的社会生活融为一体的户外环境。     

中国传统民居研究之我见

文章认为，影响中国传统民居发展和产生差异的重要因素有三：环境、技术和风俗、并有所分析。文章强调，研究旧民居是为了创造新民居，特别是量大面广的农村民居。     

两个"住"的实验

本文介绍了笔者参与的两个关于中国住宅竞赛的实验……希望引发设计者重新思考众多因素对居住的影响。"     

渡上别墅区的规划设计创新

渡上是北京市一个高档别墅小区.在创作时运用传统院落的理念,赋予现代别墅以传统内涵.通过介绍渡上别墅区建筑与风景的设计构思探讨新的别墅区规划设计理念.     

湿热地区的建筑热环境控制——以住宅设计为例

在总结湿热地区传统民居气候设计经验的基础上,对该地区现代建筑的设计原则和设计风格做了较详细的探讨,最后以住宅设计为例,叙述湿热地区应采取的建筑技术措施.     

科大花园住宅方案节能空间分析

以科大花园节能住宅小区为例，探讨了在夏热冬冷地区条件下住宅节能设计采用的新的观点、方法和技术。基于住宅风环境和耗热量计算的分析，提出了在该地区气候条件下建筑节能日照间距、窗形位、体形系数，介绍了一种新型节能围护结构体系。     

Factors affecting bulk to total bacteria ratio in drinking water distribution systems

Bacteria in drinking water systems can grow in bulk water and as biofilms attached to pipe walls, both causing regrowth problems in the distribution system. While studies have focused on evaluating the factors influencing the bacteria in bulk water and in biofilms separately, there is a need for understanding biofilm characteristics relative to the bulk water phase. The current study evaluated the effects of chlorine and residence time on the presence of culturable bacteria in biofilms relative to that in bulk water. The results showed that when no chlorine residual was present in the system, the median ratio of bulk to total bacteria was 0.81, indicating that 81% of the bacteria were present in bulk water, whereas only 19% were present in the biofilm. As chlorine concentration increased to 0.2, 0.5, and 0.7 mg/L, the median percentage of bacteria present in bulk water decreased to 37, 28, and 31, respectively. On the other hand, as the residence times increased to 8.2, 12, 24, and 48h, the median percentage of bacteria present in bulk water increased to 7, 37, 58, and 88, respectively, in the presence of a 0.2mg/L chlorine residual. The common notion that biofilms dominate the distribution system is not true under all conditions. These findings suggest that bulk water bacteria may dominate in portions of a distribution system that have a low chlorine residual.     

南太行山山地民居解读

地处南太行山的高家台村及周围地区的自然风光壮美秀丽,民居建筑恬静自然,环境极富诗情画意,犹如世外桃源.着重论述了对村落的选址、建筑环境的形式美、村居和环境及园林的关系的理解和认识.     

徽州民居的象征文化

本文通过对象征以及象征文化的界定,阐述了象征文化产生的原因,并从徽州民居的聚落布局、单体布局、装饰和建筑附件三个方面阐述了徽州民居的象征文化.