对建成环境意义的逆向思考──评福建省体育运动学院场馆区构思设计

本文以Rapoport先生《建成环境的意义》的理论逆向思考为依据,阐述福建省体育运动学院场馆区的规划构思     

建筑业构筑专业化运行体系的思考——专业化发展是中小建筑企业提高经济效益的有效途径

本文就中小建筑企业存在自身劣势和建筑业的发展趋势,提出了在某一有效的经济区域内,按照经济合理的原则,引导企业找准与市场的结合点及专业经营的切入点,采取灵活多样的经营方式,立足区域向专业化方向发展,积极实施大市场战略,把无所不包“小而全”的中小建筑企业通过专业化细分,优化组合成独立的专业生产经营机构,构筑建筑业专业化运行体系,以全面提高建筑企业的经济效益。     

作为场所的上海里弄解读

尝试从空间设计的角度去探索和分析里弄场所中空间与事件的相互作用,对发生在空间中的活动进行定量的分析,得出定性的结果,并对作为场所的上海里弄存在的必要性进行探讨,对里弄场所延续的可能性提出展望。     

Dynamic analysis of viscoelastic structures using incremental finite element method

This paper presents an efficient and accurate incremental finite element procedure, without involving any integral transformations, to deal with practical viscoelastic structures with complicated geometries subjected to dynamic loadings. The numerical error induced from the approximate inversion technique used is thus avoided. Based on the Hamilton's variational principle, an incremental functional is derived for each time increment and the inertia terms are retained in the analysis to estimate the transient viscoelastic behaviours. To model the specific stress-strain-time constitutive behaviours of viscoelastic materials, the Norton type time hardening rule is employed. In the present computation procedure, the change of creep strains is regarded as increments of fictitious body forces at the nodal points for the next time increment.

To evaluate the accuracy and the versatility of the solution technique developed in this work, several examples are given.     

新的哈龙替代物--NOVEC 1230

最近 3M公司推出了一种新的哈龙替代物——NOVEC12 30。该替代物脱离了原来在卤代烷家族中寻找哈龙替代物的思路。NOVEC12 30是一种氟化酮 ,其分子式为 C6F12 O。该药剂对人员是安全的 ,不破坏臭氧层 (不在蒙特利尔议定书所规定的淘汰物质之列 ) ,不会对地球气候变化有影响 (不在京都议定书所规定的控制排放的物质之列 ) ,具有良好的灭火性能 ,是技术上可行的哈龙替代物。一、其物化性能参数和环保参数与哈龙、其他哈龙化学替代物的比较NOVEC12 30的物理参数分子式 CF3 CF2 C(O) CF(CF3 ) 2分子量 316 .0 4沸点 (一个大气压 ) 4…     

亲切·时尚·以人为本--关于汇苑家园的设计与思考

本文介绍了汇苑家园的总体布局,建筑设计.提出应重视人居环境,营造氛围,设计手法应细致,人性化.并由此引发了建筑师应以人为本,与外界因素充分沟通协调以实现自身价值的思考……     

“实调控”型规划理念的应用研究——以南平市城镇体系规划为例

文章在传统城市规划编制进行客观评价的基础上,对"实调控"规划原则和框架作出具有创新的探讨,并结合南平市实际进行关键性的区域"实体"控制规划和城镇空间拓展规划,最终构建的区域协调发展空间,更好地促进南平市城市化与自然机体健康、和谐地发展,真正体现规划编制的人文风向、公平道义和前瞻眼光。     

Coagulation dynamics of fractal flocs induced by enmeshment and electrostatic patch mechanisms

The size and structure of flocs during floc formation were monitored for various coagulation mechanisms. Two distinctive mechanisms, namely, enmeshment and electrostatic patch, govern the dynamics of kaolin particles coagulation by polyaluminum chloride (PACl). They were investigated by small angle static light scattering (SASLS) and solid-state ²⁷Al NMR. In addition, a novel wet SEM (WSEM) was used in-situ to image the morphology of the aggregate in aqueous solution. Synthetic suspended particles were coagulated by two PACl products, a commercial product (PACl) and one laboratory product (PACl-E). The PACl-E contained more than 60% Al₁₃ while the PACl contained only 7% Al₁₃, with large percentage of colloidal Al. For coagulation by PACl at neutral pH and high dosage where the strong repulsion between particles occurs, the enmeshment ruled by reaction-limited aggregation (RLA) results in larger sweep flocs as well as higher fractal dimensional structure. For coagulation by PACl-E at alkaline pH and low dosage, the flocs were coagulated predominately by electrostatic patch with Al₁₃ aggregates. At such condition, it is likely that diffusion-limited aggregation (DLA) predominately rule PACl-E coagulation. The fractal dimension (D_s) values of PACl and PACl-E flocs formed at enmeshment and electrostatic patch increased with dosage, respectively. When breakage of flocs occurs, the breakage rate of PACl-E flocs is slower than that of sweep flocs. By WSEM imaging, the adsorption of spherical Al precipitates onto the particles was observed to form sweep flocs with a rough and ragged contour, while the PACl-E flocs were formed with a smooth and glossy structure.     

济南市集中供热蒸汽管网热损失的调查及分析

本文调查了济南市蒸汽管网的情况,分析了集中供热蒸汽管道热损失的组成,通过采集济南市具有代表性的三个蒸汽管网的运行数据,计算了其热损失,绘制了蒸汽管网的热损失率曲线图并对其进行了分析,对济南市的蒸汽管网提出了整改建议可供参考。     

福建省体育馆工程施工技术研究

福建省体育馆工程是建设部重点实施技术示范工程,在施工中结合工程施工特点和创优目标,研究、开发、应用了四大类共10余项重点实施新技术,完成了推新任务和创优的目标。