What can be taught in architectural design? — <Emphasis Type="Italic">parti,poché</Emphasis>, and felt qualities

This essay begins with a reflection on what has been taught in architectural design since the turn of the twentieth century. I shall trace back to the two disciplinary foundations of the French École des Beaux-Arts — parti and poché — in the education of an architect in the eighteenth and nineteenth centuries. I shall then attempt to superimpose parti and poché on a modern disciplinary framework, say that of mathematics, which leads to musings on a series of architectural problems that include pattern versus type, stability versus mobility, orthogonal versus oblique, confinement versus transparency, and aging versus metallic sheen. These paradoxes, I suggest, demand the education of an architect to address both the instrumental pattern of a building configuration and the ambient felt qualities of a room, rather than vision alone.     

小城镇地区可持续发展与生态安全战略

促进小城镇发展是我国城市化战略的重要组成部分,但小城镇的生态环境问题总体发展迅速,潜在危害很大,已经影响到了小城镇的健康稳定发展,生态环境问题已经上升到了生态安全的角度。目前多数相关研究只重视小城镇镇区的环境问题与乡镇工业污染问题,由于没有从镇区与周边农村的生态过程联系分析问题,因而缺乏整体性和系统性。所以提出的环境策略多是环境管制的思路,缺乏战略性。鉴于此本文提出了小城镇地区的概念与其生态安全战略。     

探讨屋面渗漏的原因与对策

屋面渗漏是建筑工程的质量通病,产生的原因很多,牵涉的范围广,分析原因,制定对策。通过从设计→施工→使用的综合防范治理,解决屋面渗漏的问题。     

浅谈小城市特色的形成——以沂源县城为例

改革开放以来,城乡经济发展迅速,城市无论在数量上还是规模上的快速发展出人意料,建设活动也最具活力。但同时,我们也清醒地看到,大多数小城市千城一面,杂乱无章,毫无特色可言。就像一支曲子,没有自己的主旋律,让人惋惜。沂源县城作为一个新建城市,不失时机地作好城市特色规划,更好地指导城市的开发和建设,就显得十分重要了。在2002年7月批复实施的县城总体规划中,将沂源县城城市性质定义为“山水生态城市”。那么沂源县城有怎样的现实条件、如何才能达到这一目标呢?一、沂源县城市要素浅析城市的特色是指城市所在地域特有的自然风光与人工…     

Spatial competition and regulatory change in the grain handling and transportation system in western Canada

The grain handling and transportation system (GHTS) has been a defining component of the western Canadian economy since the early part of the last century. Only two major railways serve the grain handling industry, so the potential for the exercise of market power in transportation appears to be significant. In fact, spatially oriented regulations applicable to railways exist in Canada to mitigate this, but to date they have not often been used by shippers. While the reasons for this are not completely clear, we suggest that the regulations are now inadequate for the current state of the GHTS. Using a unique data set from the year 2000, we assess the effect on the grain handling industry of modifications to these regulations, and find that significant gains for shippers from these modifications are possible. These gains are computed to be on the order of C$10–15 million per year for grain shippers alone. We would like to thank conference and presentation participants (Transportation Research Board, Canadian Agricultural Economics Society, University of British Columbia, University of Leeds and California State University, Long Beach) as well as the anonymous reviewers who commented on the earlier versions of this paper. We would also like to acknowledge support from the Saskatchewan Department of Highways.     

工字形铝合金偏心压杆平面外稳定承载力研究

运用ANSYS软件对工字形铝合金偏心压杆平面外稳定承载力进行了研究,分别讨论初弯曲、残余应力和截面厚度偏差等缺陷对杆件平面外稳定承载力的影响,提出稳定系数曲面的概念,指出平面外稳定系数是相对偏心率e′和相对长细比λ的二元函数,在空间上为一连续的曲面。并对不同截面尺寸杆件的平面外稳定系数进行大量计算分析,以此为基础拟合出了平面外稳定系数曲面=f(λ,e′)的函数表达式,可供设计参考。     

Fluid filling of a membrane tube with self-weight

The filling of a membrane tube with self-weight by a fluid is studied theoretically for the first time. The fundamental problem depends on two non-dimensional parameters, $\beta$ and $\gamma$ which represent the importance of internal pressure and membrane self-weight respectively. The nonlinear equations are solved by an efficient numerical integration method. It is found that membrane self-weight has considerable effect on the tube geometry and the tension of the membrane at low filling pressures.     

岩土工程档案的利用需求及管理对策

本文通过作者多年对岩土工程档案管理工作的实践,结合岩土工程档案本身的特点,总结了岩土工程档案利用需求的相关特性。     

大型商场家电类商品火灾蔓延特性研究

采用实尺实验的方法，针对模拟家电类商品的标准组件，就商品货架摆放和堆垛摆放的不同形式，研究在无水喷淋保护的条件下火灾发展和火焰传播的特性。得出该类商品发生火灾时达到旺盛期的时间、垂直方向和水平方向火焰传播速度以及火灾载荷对火灾发展影响的规律。     

CFRP筋作体外预应力束的简支梁桥设计研究

本文介绍了c筋在预应力混凝土公路梁桥建设中的应用。该桥为整体现浇25m跨径简支梁,采用CFRP筋中的碳绞线(Carbon Fiber Composite Cable)作为体外预应力束。文中论述了设计中应关注的主要问题,运用理论方法和有限元方法对结构作了全面分析,并在造价上与普通预应力混凝土梁桥作了比较。