Where to for Brazil's Cities? Citizen Empowerment or Global Marketing?

An awakening interest in public space in Brazilian cities is emphasising the value of existing civic areas. Guilherme Wisnik , a critic, curator and professor at the Faculty of Architecture and Urbanism of the University of São Paulo, looks at the history and potential future of Brazil's urban spaces. He highlights how despite the introduction of innovative Modernist design in the mid-20th century, which forged ‘a new relationship between architecture, urbanism and landscape design’, more recently the country's cities have been subject to the vicissitudes of market and political forces.     

温泉水电站厂房扩建工程基础开挖施工

既要进行温泉水电站厂房扩建工程基础开挖,又要保护好附近的建筑物和正在运行原厂房机电设备不受影响,对厂房扩建工程基础开挖采取了有效的控制和防护措施,取得了良好的效果。     

Parametric virtual laboratory development: A hydropower case study with student perspectives

In order to take advantage of trends such as genetic-design students need to be familiar, and comfortable, with the concept of parametric computer models and how their parameters relate to physical-forms. Virtual learning software can aid in creating that understanding and help support studies at all undergraduate levels in engineering design disciplines. As an example, hydropower rotors are complex and largely rely on computational analysis of geometries for single rotor types. That problem can be significantly overcome using a parametric algorithm capable of creating an almost-infinite variety of computer models. Therefore, this paper investigates the shared parametric properties of common crossflow hydropower rotor geometries, resulting in a generic model that is then used to illustrate application in real-time interactive virtual learning software capable of producing accurate stereoscopic images and stereolithography files for 3D printing, as well as linking to constructive solid geometry software for slower, but more detailed, analysis. A pilot survey of student attitudes to the virtual learning prototype and resulting geometries is then discussed, illustrating the potential for 3D graphics as an effective addition to virtual learning of parametric design methods, and giving initial direction for future work.     

水轮发电机组碳刷防脱落装置 研究及应用

针对深溪沟水电站4台轴流转桨式水轮发电机组投产以来励磁碳刷和滑环存在缺陷进行了分析，研究开发出一种碳刷防脱落装置，已运用于深溪沟水电站发电机上，可以有效地防止机组运行中碳刷脱落造成转子接地或正负极短路情况的发生。     

核电站暖通系统仪表的抗震试验程序和方法

本文介绍了暖通系统的仪表抗震试验的试验目的、试验程序和实施方案及合格判定要求，分别从抗震仪表分类、试验步骤、试验方法和功能评价等方面进行阐述，为核电站仪表或设备的抗震试验提供一定的试验思路和借鉴指导。抗震鉴定试验表明，被试仪表具有足够的强度抵抗设计地震载荷，试验中及试验后被试仪表结构完整并且运行功能完好，满足暖通系统对此类仪表的抗震Ⅰ类的抗震要求。     

The effect of changes in nitrate concentration in drinking water on methemoglobin levels in infants

For a five‐day period infants consuming powdered milk formula made up with tap water were exposed to water of controlled nitrate content. There was a significant rise in MetHb levels above normal in most children after the first day of exposure to high nitrate water (108 mg/1 NO3). This was followed by some indication of a drop in MetHb levels despite the continued exposure and finally a return to normal levels when the exposure to nitrates stopped. No clinical signs of methemoglobinemia developed. The possible existence of an adaption mechanism is suggested but requires further elucidation.     

向家坝水电站大坝不良地质层宽大齿槽开挖施工技术

向家坝大坝坝基存在不良地质地层,工程采取了设置宽大齿槽将不良地层挖除的处理措施。坝基齿槽施工具有开挖深度大、地下渗水量大、高边坡安全风险高等特点,在施工中研究、应用了钢管桩、钢筋桩等多种支护技术,设计了地下水处理设施,制定可行的爆破开挖方法。坝基齿槽开挖实现了快速施工、质量优良、安全无事故的建设目标,其中的施工技术值得在类似水利工程施工中推广应用。     

大渡河安宁水电站深厚覆盖层勘探技术 与方法概述

本文介绍了大渡河上游安宁水电站可研阶段河床深厚覆盖层勘探所用的技术与方法，即：植物胶钻具钻进、厚壁套管跟管钻进及多级跟管钻头钻进。此外，还介绍了覆盖层钻孔孔内旁压试验和原状砂样的采取技术。在该深厚覆盖层勘探中应用的技术与方法保证了勘探工作的圆满完成，为工程设计提供了详实、可靠、全面的参数，同时也完善勘探技术与内容，提高了勘探水平，为今后的勘探工作作了相应的技术储备。