株洲市中心医院的结构设计

较详细地介绍了株洲市中心医院结构的设计过程,包括基础选型,超长地下室,钢结构屋盖设计,以及医疗设备用房相关的荷载取值,防辐射,直线加速器室,高压氧舱的设计要点等,相关设计方法可供同类项目参考。     

Effects of NOM properties on copper release from model solid phases

This study examined impacts of concentrations and properties of natural organic matter (NOM) on copper release from characteristic copper solid model phases such as tenorite CuO and malachite Cu₂(OH)₂CO₃. Unaltered Aldrich humic acid (AHA) and standard Suwannee River fulvic acid (SRFA) strongly increased copper release from the model phases but NOM alteration by chlorination or ozonation gradually suppressed or, at higher oxidant doses, eliminated these effects. The nature of NOM changes induced by chlorination and ozonation was examined using differential absorbance spectroscopy (DAS) and high-performance size-exclusion chromatography (HPSEC). The data of these methods show that NOM molecules with higher apparent molecular weight (AMW), higher aromaticities and contributions of protonation-active phenolic and carboxylic groups play a key role in adsorption and colloidal dispersion of the model solids. The data also show that metal release from model phases was well correlated with a number of spectroscopic parameters characterizing NOM properties, notably SUVA₂₅₄, spectral slopes of NOM absorbance, and differential absorbance at wavelength of 280 nm and 350 nm that is indicative of the contributions of carboxylic and phenolic functional groups. Changes of ζ-potential of the model solid phases were the strongest predictor of the enhancement of copper release especially in the system controlled by malachite. While effects of NOM on the ζ-potential of tenorite and malachite were prominent for unaltered NOM, its oxidation by chlorine and ozone was accompanied by a gradual decrease and ultimately disappearance of its surface activity.     

桥梁水中墩施工措施研究

在桥梁建设中,水中墩施工技术一直是技术难点和突破重点。本文在总结目前桥梁水中墩施工实践的基础上,首先对水中墩概念及施工常用技术进行了介绍,然后分析了目前技术中存在的不足和改善的重点,并针对不足提出了改进方法。     

The impact of property price on construction output

The interaction between the construction market and the overall economy has attracted much attention, but few studies have investigated the influence of the property market on the construction market in terms of property price. The disaggregated data of Hong Kong’s housing and retail construction sectors are collected to investigate the impact of property price on construction output. The newly developed autoregressive distributed lag (ARDL) bounds testing approach and the error correction (EC)-based Granger causality test are employed. The bounds testing results suggest that there exist stable long-run relationships between construction output and property price for both housing and retail construction sectors. Specifically, a 1.00% increase in the housing price and retail price lead to a 0.55% and 0.42% increase in construction outputs for the two sectors respectively. In addition, the Granger causality tests confirm a distinct long-run causal flow from property price to construction output. Furthermore, the proposed ARDL approach provides an effective method for forecasting construction output.     

保障性住房的公共服务体系建构

通过对保障性住房目标人群的居住需求分析归纳出:居住需求可根据时间分为“永久性”与“非永久性”;居住空间可根据功能分考“核心”与非核心”功能空间:基于预期需求的住宅产品价值消费具有被动性特点.在此基础上,结合我国保障性住房建设的约束性条件,提出若干保障性住房的公共服务功能建设构想.     

高层建筑基本平面形式及布局对城市总体通风的影响研究

该文从平面的视角出发,对高层建筑基本平面形式选择、总平面布局对城市风环境带来的影响进行分析.高层建筑的不同基本平面形式,以及总平面布局中朝向、尺度、外部空间等方面的不同设计决策,对城市总体通风的影响有显著差异.根据定性分析,以及PHOENICS流体动力学软件的模拟结果,总结高层建筑设计中需要考虑的平面选型和布局策略,以保证城市风道畅通,提高城市总体通风效率.     

海南岛高速公路一般互通立交选型研究

通过对海南岛高速公路已建成的60座一般互通立交的分析,阐述了菱形立交、部分苜蓿叶形立交及单喇叭立交在不收费高速公路中的设置特点,并对其优缺点进行了比较,提出了选择四肢交叉形式,且最优立交形式为菱形立交或半苜蓿叶形立交的选型思路,并通过设计实例,阐述了该选型思路的运用技术。     

解读TOP300＆TOP10s

“Wa300调查”是一项有关全球建筑设计公司的较全面的年度调查。主办者World Architecture杂志每年以问卷的方式向全球征集相关数据，并依此推出年度“TOP300”和“TOP10s”排名，截至2003年1月已是他们连续第十一个年头作此项调查了。今年的网上问卷主要涉及以下几方面内容。     

关于对数积分的基本理论

提出了实对数导数与对数积分的基本理论 ,证明了实对数导数和对数积分与 (常义 )导数和积分的关系及充要条件 ,所得到的定理与公式在实数域内对处理函数乘、除、乘方、开方及复合函数的性质具有独特的优势 .实对数导数与对数积分的基本理论是对经典微积分理论的扩充     

高层建筑疏散计划

1简介发生在高层建筑中的火灾或其他紧急事件给消防部门带来了致命的挑战。许多消防专业人士考虑到商住高层建筑中的大量人员、建筑性质以及典型构造给灭火救援带来了无法接受的风险。实际上,消防部门对于着火层以上的超出消防云梯车救援高度的区域没有太多的办法。所以,如果在这种情况下发生火灾,后果完全取决于建筑内部的安全机制。建筑内部安全机制之一就是制定疏散计划。2什么是高层建筑?大部分建筑规范定义高层建筑为那些建筑高度超过了当地消防云梯车所能达到的高度的建筑。通常认为7层或7层以上的建筑为高层建筑。虽然高层建筑的设计…