幕墙产品生产许可证取证中应注意的问题

本文根据国家有关标准,结合笔者参与的建筑幕墙生产许可证审查情况,着重就《建筑门窗、建筑幕墙生产许可证换取证质量体系考核办法》中的技术管理部分,提出企业在取证过程中应注意的问题。     

渠系水工建筑物保温措施的研究及计算机模拟

聚苯乙烯泡沫板是一种保温材料,用在渠系水工建筑物具有防冻胀作用.通过现场的试验研究和计算机模拟,得出了无措施与铺设聚苯乙烯泡沫板作为保温措施时渠系水工建筑物温度场的变化规律,为聚苯乙烯泡沫板厚度的选取以及聚苯乙烯泡沫板铺设位置提供理论支持和技术指导.     

Building facade detection,segmentation, and parameter estimation for mobile robot stereo vision

Building facade detection is an important problem in computer vision, with applications in mobile robotics and semantic scene understanding. In particular, mobile platform localization and guidance in urban environments can be enabled with accurate models of the various building facades in a scene. Toward that end, we present a system for detection, segmentation, and parameter estimation of building facades in stereo imagery. The proposed method incorporates multilevel appearance and disparity features in a binary discriminative model, and generates a set of candidate planes by sampling and clustering points from the image with Random Sample Consensus (RANSAC), using local normal estimates derived from Principal Component Analysis (PCA) to inform the planar models. These two models are incorporated into a two-layer Markov Random Field (MRF): an appearance- and disparity-based discriminative classifier at the mid-level, and a geometric model to segment the building pixels into facades at the high-level. By using object-specific stereo features, our discriminative classifier is able to achieve substantially higher accuracy than standard boosting or modeling with only appearance-based features. Furthermore, the results of our MRF classification indicate a strong improvement in accuracy for the binary building detection problem and the labeled planar surface models provide a good approximation to the ground truth planes.     

Apply of Low-Carbon Technology in Building Energy Conservation in Hot Summer and Cold Winter Area

Building energy conservation is the basis for carbon emission reduction, through elaborating the relationship between low carbon and energy efficient building. It points out that the construction of energy-saving emission reduction is an effective means to solve the problems of high energy consumption of the building, and it is also an important measure for China＇s carbon emission reduction. According to the climate characteristics in hot summer and cold winter area, low carbon technology suitable for the construction of energy-efficient hot summer and cold winter area is proposed which is based on the analysis of the current main building energy-saving technical measures.     

关于航天电子设备结构的EMC设计

从结构的角度出发,结合航天平台的特殊性和工程经验,对系统和设备的电磁兼容设计原则进行了一定的阐述。     

Development of Boundary Structures for Complex-Shaped Buildings

Over the past few years, the field of architecture has witnessed revolutionary changes in design. The recent completions of Frank O. Gehry’s projects brought unprecedented attention to complex-shaped, nonconventional design. In following these latest trends, the author has been drawn to the issue concerning the structural systems currently being adopted in realizing these complicated designs. It is perhaps inevitable that the traditional structural systems, comprised of structural elements suitable for use in conventional linear shapes, face tremendous challenges and limitations in building such complicated designs. In this context, this research consists of proposing a new alternative by employing “boundary structures with continuously changing curvature,” which follow the complex-curved envelope surface, as well as fabricating an experimental model made of polymer composite materials with computer-aided design/computer-aided engineering/computer-aided manufacturing technologies. Consequently, the study aims at offering architects unprecedented freedom in design and a new paradigm for realizing their creative ideas.     

从"为大众的住宅"到"为大众的社区"从"居住区规划"到"社区建设"

在历经20年的建设后，中国的城市住房在数量和质量方面都有了飞跃发展，但同时，城市的富裕居民和贫困居民在住房条件上的鸿沟也日益加大。有鉴于美国在住房建设方面的经验，文章提出应制定一种侧重于社会发展的住房新政策，并提出“为大众的社区”和“社区建设”的概念。     

Statische und dynamische Axialdruckversuche an vergrouteten Rohr‐in‐Rohr‐Verbindungen mit verschiedenen Füllmaterialien

In diesem Beitrag wird über Ergebnisse von experimentellen und numerischen Untersuchungen an vergrouteten Rohr‐in‐Rohr‐Verbindungen berichtet, die am Institut für Stahlbau der Leibniz Universität Hannover durchgeführt wurden. Diese sogenannten “Grouted Joints” kommen z. B. als Verbindungselemente zwischen dem im Boden eingerammten Pfahl und dem Turm einer Offshore‐Windenergieanlage zum Einsatz. An deutlich kleineren Prüfkörpern wurden Axialdruckversuche im Labor durchgeführt, um den Unterschied zwischen glatten und gerippten Stahlrohrmantelflächen im Grenzzustand der Tragfähigkeit und Ermüdung aufzuzeigen. Dabei kamen auch verschiedene Füllmaterialien für den Ringspalt zum Einsatz. Die Tragfähigkeit bei den Prüfkörpern mit glatten Rohrmantelflächen ist hauptsächlich von der Haftfestigkeit des Füllmaterials auf den Stahloberflächen und deren Beschaffenheit abhängig. Durch die Anordnung von Schubrippen kann die Trag‐ und Ermüdungslast um ein Vielfaches gegenüber der glatten Variante gesteigert werden. Dies ist hauptsächlich auf die Wirkung von Druckstreben zwischen den Schubrippen zurückzuführen, deren Tragfähigkeit sich mit zunehmender Druckfestigkeit des Füllmaterials erhöht. Mit einem Bemessungsmodell kann unter Berücksichtigung der Druckstrebentragfähigkeit und Anzahl der Schubrippen die Traglast von Grouted Joints abgeschätzt werden. Static and dynamic axial compression tests on grouted tube‐in‐tube connections with various grout materials. This paper summarises static and dynamic axial compression tests on small scale grouted joints for offshore wind energy converters. The connection is mostly used between driven monopiles and tower sections as tube‐in‐tube connection. The gap between the tubes is filled with grout materials. The test series comprises grouted joints with smooth and ribbed surfaces of the tubes which are loaded by axial compression. The ultimate and fatigue limit state of the connection can be increased with shear keys along the overlapped length of the tubes to get a ribbed contact surface to the grout. In this case the axial load is transferred by compression struts between the shear keys. The bearing capacity depends mainly on the compressive strength of the grout and the geometry of the shear keys. In addition to the experimental results an analytical design concept is presented within this paper for grouted joints with shear keys. With the analytical model the axial load capacity of the grouted joint can be determined under consideration of the compression struts and number of shear keys.     

LonWorks技术在楼宇自动化系统中的应用

针对BAS中存在的系统集成难题，结合某工程的技术改造，构建了基于LonWorks总线的BAS控制网络结构。文中分析了集成系统通信的实时性，探讨了相关技术难点，特别是各子系统之间的通信问题。工程实践表明基于LonWorks的现场总线技术在楼宇自动化系统中有极好的应用前景。