Bebauungsplan; Verbot der Errichtung von Einstellpl?tzen; gro?fl?chige Schotterungen; Begriff "Einstellplatz"

Der im Bebauungsplan (hier: aus dem Jahr 1988) verwendete und historisch zu interpretierende Begriff "Einstellplatz" umfasst auch gro?fl?chige Schotterungen.     

本体论视角下HBIM-MR技术在建筑遗产评估管理的应用研究

在知识本体论与HBIM之间映射关系的视角下,提出基于5W1H模型的HBIM数据信息结构用于建筑遗产数据信息采集,并提出基于HBIM-MR技术的建筑遗产评估管理框架.通过"汇丰公馆"的建筑遗产评估管理为例,开发基于HBIM-MR技术的建筑遗产评估管理应用模型实现虚拟交互可视化,使管理人员与保护专家实现评估管理信息的共享和...     

精铸W18Cr4VAl高速钢的性能

将Ｗ１８Ｃｒ４Ｖ讥速钢废料，采用中频感应炉炼，出钢前加Ａｌ，熔模精密铸造车刀刀具，经淬火和四次回火后，硬度达ＨＲＣ６４．５，冲击韬性达到２２．１Ｊ／ｃｍ＾２。精铸车刀寿命与锻造的相当。     

W18Cr4V钢的离子氮碳共渗┐离子渗硫复合处理

本文研究了Ｗ１８Ｃｒ４Ｖ钢的离子氮碳共渗－离子渗硫复合处理工艺。试验表明，Ｗ１８Ｃｒ４Ｖ钢经离子氮碳共渗－离子渗硫复合处理后，表层可获得氮碳化合物和硫化物的复合渗层。该复合渗层可以明显提高Ｗ１８Ｃｒ４Ｖ钢的耐磨性。     

空拔钢管壁厚计算

介绍了笔者的空技钢管壁厚计算算式和其图，分析了其精度。49个例子的分析结果表明，平均误差为2.30％，壁厚变化性质的判时率为95.9％；空技模模角、摩擦系数及钢管材质和状态对计算结果影响不大。     

基于探地雷达检测原理的隧道二衬拱顶带模注浆材料配制技术研究

结合探地雷达检测的原理,研究了影响探地雷达检测效果的关键注浆材料性能指标,并初步研究了注浆材料配合比参数、注浆材料用减水剂与膨胀剂的种类及掺量对注浆材料关键性能的影响。结果表明,注浆材料的介电常数及注浆材料的填充密实性是影响探地雷达检测结果的关键性能。水胶比是影响注浆材料介电常数的关键参数。注浆材料的填充密实性能受流动度和膨胀率双重指标的影响,减水剂与膨胀剂的种类及掺量影响注浆材料的流动度和膨胀率,进而影响注浆材料的填充密实性能。     

PolyHIPEs: Recent advances in emulsion-templated porous polymers

Porous polymers with well-defined porosities and high specific surface areas in the form of monoliths, films, and beads are being used in a wide range of applications (reaction supports, separation membranes, tissue engineering scaffolds, controlled release matrices, responsive and smart materials) and are being used as templates for porous ceramics and porous carbons. The surge in the research and development of porous polymer systems is a rather recent phenomenon. PolyHIPEs are porous emulsion-templated polymers synthesized within high internal phase emulsions (HIPEs). HIPEs are highly viscous, paste-like emulsions in which the major, “internal” phase, usually defined as constituting more than 74% of the volume, is dispersed within the continuous, minor, “external” phase. This review focuses upon the recent advances in polyHIPEs involving innovations in polymer chemistry, macromolecular structure, multiphase architecture, surface functionalization, and nanoparticle stabilization. The effects of these innovations upon the natures of the resulting polyHIPE-based materials (including bicontinuous polymers, nanocomposites, hybrids, porous ceramics, and porous carbons) and upon the applications involving polyHIPEs are discussed. The advances in polyHIPEs described in this review are now being used to generate new families of porous materials with novel porous architectures and unique properties.     

Design Data for Three-Lobe Bearings

Three-lobe bearing design data, which include both static and dynamic characteristics, are presented for laminar as well as turbulent regimes of operation. The results have been computed for ellipticity ration δ = 0.5, aspect ration λ = 1/3, 1/2, 2/3, and 1, and Reynolds numbers Re = 0, 3000, 6000, 9000, and 12000.     

WC-Co硬质合金的Palmqvist韧性

根据WC－Co硬质合金的真实断裂韧性KIC与维氏硬度HV间的实验关系规律和线弹性断裂力学分析，讨论了由Viswanadham和Venables提出的Palmpvist表面断裂韧性W和维氏硬度HV间的实验关系1／W＝AH－B的实用性和W＝β·GIC（GIC为应变释放率）假设的可靠性．结果表明，对于WC－Co硬质合金，难以用Palmqvist表面韧性取代KIC。     

注射成形高密度合金的变形控制

研究了注射成形高密度合金的变形行为和变形控制。实验表明,在液相烧结过程中,由于重力作用导致粘性流动,合金试样发生变形。对W含量较高的合金,采用二步烧结工艺可以有效地控制变形。在此工艺中,压坯首先在粘结相熔点以下温度烧结,形成W连通骨架,然后在高于粘结相熔点以上的温度下烧结较短时间以达到全致密;对于W含量较低的高密度合金,将原始混合粉末采用机械合金化,然后再进行固相烧结,可以得到性能很高的无变形的合金。