大门景观设计艺术浅识

大门具有众多功能实在的景观价值和文化内涵。认识大门与围墙、主体建筑、道路、山水植物及雕塑等要素的景观配置艺术是必要的。     

Seismic response of liquid-filled elevated tanks

The main focus of the current study is to evaluate the performance of elevated tanks under seismic loading. In this study, the finite element (FE) technique is used to investigate the seismic response of liquid-filled tanks. The fluid domain is modeled using displacement-based fluid elements. Both time history and modal analyses are performed on an elevated tank. Using the FE technique, impulsive and convective response components are obtained separately. Furthermore, the effect of tank wall flexibility and sloshing of the water free surface are accounted for in the FE analysis. In this study complexities associated with modeling of the conical shaped tanks are discussed. This study shows that the proposed finite element technique is capable of accounting for the fluid-structure interaction in liquid containing structures. Using this method, the study of liquid sloshing effects in tanks with complex geometries such as conical tanks is made possible. The results of this study show that the current practice predicts the response of elevated tanks with reasonable accuracy.     

装饰工程室内空气环境质量控制

建筑工程使用的无机非金属建筑材料和装修材料，是造成民用建筑工程室内有害物质氡、甲醛、苯、氨及总挥发性有机化合物（TVOC）等空气污染的污染源。这些有害物质对人体健康危害较大，因此装饰装修施工时须对材料的有害物含量进行检验，施工过程中也应注意对污染源进行控制，竣工验收时须对室内宅气质量进行检测，合格后方可验收使用。民用建筑工程室内空气质量不合格的工程，严禁使用。     

探求现代空港建筑设计中的地域性--乌鲁木齐地窝堡国际机场航站楼设计随笔

现代航站楼设计追求地域特色必须因地制宜地解决空港中重要的流程、功能、空间、技术、节能等问题。指出将地域要素自然地贯彻过程始终，才能恰当地表达出地域特色。     

Contribution of marine and continental aerosols to the content of major ions in the precipitation of the central Mediterranean

The region of the investigated receptor is situated in the southern part of the Adriatic Sea in the Mediterranean. The measuring station is located on the seashore, which, being considered as a border area, is representative for the qualitative and quantitative estimation of the influence of marine and continental aerosols on the content of major ions in precipitation. In the sampling period, precipitation in the region of the investigated receptor was more abundant during the summer and autumn than during the winter and spring. The most frequent precipitation heights were up to 20 mm, while high precipitation came exclusively from the continental region. The results of the measurements of ions readily soluble in water were used for the differentiation of marine from continental contributions of primary and secondary aerosols to their content in the precipitation. Using PCA, it was shown that main contribution of Cl(-), Na(+) and Mg(2+) came from primary marine aerosols, while the contribution from continental sources was dominant for the content of SO(4)(2-), NO(3)(-), NH(4)(+) and Ca(2+) in the precipitation. The continental origin of Ca(2+) was from a primary source, while SO(4)(2-), NO(3)(-) and NH(4)(+) were representatives of secondary aerosols produced by reactions between acid oxides and alkaline species in the atmosphere, but SO(4)(2-) and NO(3)(-) also exist in the precipitation as free acids. The origin of the trace elements Cd, Cu, Pb and Zn in the precipitation came from anthropogenic emission sources. The results obtained in this work are based on experimental data from 609 samples collected during the period 1995-2000.     

钢筋砼结构抗火性能研究现状与展望

火灾产生的高温可使建筑结构严重破坏甚至倒塌,为了保证建筑结构具有足够的抗火能力,必须进行建筑结构的抗火分析和设计。总结了目前国内外钢筋砼结构抗火性能研究的现状,包括国内外抗火试验研究现状、温度场计算、构件承载力计算以及建筑结构抗火性能应用软件研究等,并对今后的研究方向进行了展望。     

买房之选房技巧探讨

围绕消费者买房之选房技巧，从怎样选择户型、健康住宅标准、如何看房屋设计图纸、购房如何看房屋质置、挑选房子的标准、选房要素等进行探讨，以保证购到满意住房。     

空间钢刚架的双重非线性极限分析

本文考虑了材料非线性和几何非线性影响因素,应用荷载—位移逐步增量法,通过自行编制的程序,求算出了空间钢结构刚架的荷载位移全过程曲线。并与单重非线性和双重线性方法分析的结果进行了比较,通过程序计算和试验实测表明,双重非线性有限元法更能真实地反映结构的实际工作。 最后,本文还求出了在各种荷载和各种约束状况下刚架结构双重非线性的极限承载力以及其对应的极限模态。     

Geochemistry of some rare earth elements in groundwater,Vierlingsbeek, The Netherlands

Groundwater samples were taken from seven bore holes at depths ranging from 2 to 41m nearby drinking water pumping station Vierlingsbeek, The Netherlands and analysed for Y, La, Ce, Pr, Nd, Sm and Eu. Shale-normalized patterns were generally flat and showed that the observed rare earth elements (REE) were probably of natural origin. In the shallow groundwaters the REEs were light REE (LREE) enriched, probably caused by binding of LREEs to colloids. To improve understanding of the behaviour of the REE, two approaches were used: calculations of the speciation and a statistical approach.For the speciation calculations, complexation and precipitation reactions including inorganic and dissolved organic carbon (DOC) compounds, were taken into account. The REE speciation showed REE(3+), REE(SO(4))(+), REE(CO(3))(+) and REE(DOC) being the major species. Dissolution of pure REE precipitates and REE-enriched solid phases did not account for the observed REEs in groundwater. Regulation of REE concentrations by adsorption-desorption processes to Fe(III)(OH)(3) and Al(OH)(3) minerals, which were calculated to be present in nearly all groundwaters, is a probable explanation.The statistical approach (multiple linear regression) showed that pH is by far the most significant groundwater characteristic which contributes to the variation in REE concentrations. Also DOC, SO(4), Fe and Al contributed significantly, although to a much lesser extent, to the variation in REE concentrations. This is in line with the calculated REE-species in solution and REE-adsorption to iron and aluminium (hydr)oxides. Regression equations including only pH, were derived to predict REE concentrations in groundwater. External validation showed that these regression equations were reasonably successful to predict REE concentrations of groundwater of another drinking water pumping station in quite different region of The Netherlands.     

历史与自然的交织——创造独特风格的景观环境

文章从具体的项目分析出发,结合历史因素与自然因素,探讨了如何创造独特风格的景观环境,以及如何把握好历史与自然的关系,处理好人与环境的关系等问题。