改善多层住宅供暖设计的几项措施

提出了将水平干管敷设于屋面以解决上供下回系统在建筑层高较低时 ,水平干管影响室内美观及排气阀浮球不易检修等矛盾的几种设计方案 ;介绍了几项改善管网运行效果的措施。     

Seedling biomass allocation and vital rates of cloud forest tree species: Responses to light in shade house conditions

Patterns of above- and below-ground biomass allocation in seedlings of nine common cloud forest (CF) tree species of western Mexico were examined under varying controlled light conditions using artificial shade houses. We analysed the relationships between vital rates (growth and survival) and four morphological traits (SLA, biomass allocation to stems, leaves and roots). We hypothesised that these traits represent differentiation axes in the way seedlings face the heterogeneous light regime typical of the CF understorey. For all species, traits between the different light levels, i.e. allocation to leaves, roots and stems differed among light levels. Five species had the largest SLA in the lowest light levels at the end of the experiment (Citharexylum, Dendropanax, Fraxinus, Quercus and Magnolia). Juglans was the only species with a large SLA at the highest light level (377.47 cm² g⁻¹). In contrast, light levels did not cause any significant variation in SLA of Persea and Simplococarpon at the end of the experiment. The relative height growth rates (RHGR) of the seedlings of five species were significantly different between light levels (P < 0.05). Overall, all species grew better in the highest light levels. The RHGR of three species were correlated positively with SLA. In turn, allocation to stem, leaves and root biomass were strongly correlated with the RHGR of five species (e.g. Citharexylum, Dendropanax and Fraxinus). Survival did not vary significantly between treatments in any species, only in the case of Simplococarpon (P < 0.05) and was correlated with all morphological variables. For this species, Peto and Peto's test showed a significantly larger survival of seedlings in the highest light level. The mean responses of these species based on all traits to the controlled light variation did not differed significantly. Our results show that these species display a wide range of resource allocation patterns when exposed to the varying light conditions that may be found in the forest understorey and highlight the role of morphological traits in this variation.     

中小套型住宅中厨房与卫生间的空间设计研究

在国家现行政策下,中小套型住宅成为住宅房地产市场的主流产品.文章以人体工程学为依据、以满足基本行为单元需求且兼顾一定舒适性为原则,研究了中小套型住宅的厨房、卫生间的空间,并提出了适宜的尺度、面积.     

兰州市房地产市场发展历程及现状分析

简述了兰州市住房制度改革概况,分析了兰州市房地产市场的发展历程及市场交易现状,有利于总结经验和教训,促进兰州市房地产市场更健康平稳地发展。     

蔬菜大棚条件下土壤性质及环境条件的变化

原本种植一般作物的大田,在以大棚方式栽培蔬菜后,其土壤性质会发生一系列的变化。本文根据国内的相关研究报道,论述了蔬菜大棚条件下土壤的物理、化学和生物学性质变化及其应对措施,并提出了值得进一步深入系统研究的问题。     

东北地域农村朝鲜族民居实态调查研究

以位于延边朝鲜族自治州的朝鲜族聚居村龙山村为研究对象进行调查,阐明了朝鲜族的民居特性.农村民居由木结构土草房变为砖瓦房,平面结构中通间与双通屋较多,屋内间数逐年增加,继承了北朝鲜东北部的民居特色,并维持朝鲜民族传统居住习惯(火炕取暖和坐式生活),但在适应延边地理和气候特性后,逐渐转变成汉族、满族等多民族混居的文化形态.     

民用住宅水暖系统常见问题及预防

针对给排水管道中常见的排水管道堵塞、管道渗漏及噪音等问题,分析了其产生的原因,并提出了预防措施和处理方法。     

无障碍住宅建设的必要性

无障碍环境建设随着我国改革开放、经济社会快速发展的进程深入人心,其重要性已经被越来越多的人所认识。通过对我国现实居住环境特点的分析,浅析了无障碍住宅建设的必要性。     

徽州传统民居室内水体蒸发实测研究

徽州传统民居室内水体蒸发对室内环境的营造起到了积极作用。根据水体蒸发热平衡,建立民居室内水体蒸发模型,用实地连续测试的蒸发数据对该模型进行验证。结果表明,该模型能有效的计算徽州传统民居室内水体蒸发过程,计算和测试的水体蒸发量之间的均方根误差和平均相对误差分别为41.5 g/（m²·h）和4.2%。环境参数中地面温度、太阳辐射、风速、相对湿度和气温对水体蒸发的影响程度逐渐降低,蒸发量和环境参数之间的相关系数分别为0.909、0.779、0.736、-0.654和0.622。