ZnNi – Beschichtung hochfester Bauteile aus Stahl

ZnNi – Plating of high strength steel components Pre‐treatment and electroplating as well as post‐plating treatment of especially low alloyed high tensile strength steel components can be followed by a delayed hydrogen‐induced fracture known as hydrogen embrittlement. The entire coating process has to be controlled to avoid any failure. Most important is, that atomic hydrogen being evolved during the coating process and penetrating into the base metal after all shows an subcritical concentration within the system with respect to the mechanism of hydrogen embrittlement. Generally this will be obtained by a suitable post‐plating heat treatment of the coated components. There is evidence however that under special conditions for ZnNi – plating from alkaline solution this is not necessary. Results are reported concerning the nucleation and crystal growth and the hydrogen diffusion through ZnNi‐deposits. Further on hydrogen depth profiles of coated components and their mechanical properties will be presented and discussed.     

有条件的正态应力、强度模式结构可靠性的经典精确下限

结构可靠性的估计问题是机械可靠性的主要问题之一。强度、应力均为正态变量的结构模式是一种较常见的模式,由此研究这一模式结构可靠性的区间估计问题,给出正态强度、应力的分布参数均未知,但它们的方差之比为已知常数时,结构可靠性的经典精确置信下限。其下限满足一个含有非中心t分布的方程,借助于已有的非中心t分布分位数表可以方便地计算得到。     

The Presence of the Weather

Modern architecture has dedicated much of its discourse to crystal-ball gazing – dwelling on the visionary and the speculative. Conversely, Kevin Nute , Professor of Architecture at the University of Oregon, puts the case for the present over the future and the past. To enhance experiences of the present, he describes how architects can harness the effects of changing temporal and weather conditions – sun and shadow, wind and rain. Design can heighten the sensory stimuli these conditions generate, keeping us ‘in the moment’ while still enjoying the comfort of being indoors.     

Inhabiting Time

In recent architecture, design has prioritised an engagement with time through its creation of temporary and highly flexible structures. There has, however, been less focus on how the design of buildings might impact the experience of time of the people who inhabit them. Here the distinguished author and emeritus professor Juhani Pallasmaa , who is renowned for his writings on the phenomenology of architecture, provides a reminder of the importance of what it means to ‘dwell in time’.     

A Field Guide to Radical Post-Modernism

Sean Griffiths, Charles Holland and Sam Jacob of FAT curate and classify the work of a diverse and international grouping of Radical Post-Modern architects. They range from the recently defunct Foreign Office Architects (FOA), known for their proclivity for pattern and ornament, to Tokyo-based Atelier Bow-Wow who are rigorous in their pursuit of the ordinary. They run the gamut of the highly figurative, as exemplified by Melbourne-based practice ARM, to the expressive austerity of Swiss architect Valerio Olgiati. Copyright © 2011 John Wiley & Sons, Ltd.     

包装用BA/St改性水性聚氨酯及其粘接性能的研究

以丙烯酸丁酯(BA)和苯乙烯(St)为改性剂、双丙酮丙烯酰胺(DAAM)为交联剂,采用自由基引发聚合工艺,制备出高性能的BA/St改性水性聚氨酯(WPU)包装用胶粘剂。采用红外光谱(FT-IR)仪和粒度分析仪对乳液的结构和性能进行了分析,讨论了R值(即-NCO/-OH的物质的量比)、改性剂、St和交联剂用量对胶粘剂粘接强度的影响。试验结果表明:当R=1.1、w(改性剂BA/St)=28%(相对于WPU而言)、w(St)=30%(相对于BA/St而言)和w(DAAM)=2%时,乳液的粘接性能最佳;由该乳液配制的胶粘剂可以满足多种复合软包装膜的使用要求。     

解读澳门圣保禄教堂

该文指出澳门耶稣会士以罗马耶稣会教堂为设计原型,结合澳门地理、气候特点,以及城市发展条件．吸收当地技术,设计建造出独具特色的圣保禄教堂,从建筑学角度再度体现耶稣会的传教策略,呈现“适应性建筑”形态。笔者以考古资料为依据,结合西方教堂设计原则,尝试还原出圣保禄教堂的平立面图。     

St. John's Wort (Hypericum Perforatum): Practical considerations based on the evidence.

Reviews the available data on hypericum perforatum, an herbal remedy known as St. John's wort commonly used for psychological and psychiatric symptoms, such as anxiety, depression, cognitive dulling, and insomnia. Specifically, data regarding hypericum's efficacy, tolerability, and potential for interactions is examined. It is hoped that this review will allow clinicians to draw their own conclusions regarding this herb and provide them with information for educating and guiding discussions with patients. It is noted that the ethical, legal, and practice issues related to psychologists recommending—or even discussing—the use of herbal preparations remain complex, and that psychologists should be aware that this is not a risk-free area. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

油藏地球物理学方法在地质建模中的应用

构造模型、岩石物性参数模型和流体模型是油藏数值模拟所使用的三维地质模型中最重要的组成部分 ,充分应用油藏地球物理学方法 ,可以提高所建地质模型网络节点参数的准确程度。文中给出一些实例 ,利用地震均方根振幅剖面精细解释断层、恢复古应力场进行层面曲率分析、计算破裂值的平面分布来判断地质体的破裂程度从而建立构造模型 ;采用三维地震相干切片技术和多参数约束反演技术 ,定量地建立岩石物性参数分布模型 ,并解释单砂体骨架空间分布 ,建立单砂体骨架模型 ;利用地震连井剖面 ,综合测井、地质资料 ,以人工神经网络技术和多元统计分析为基础的模式识别技术 ,对地震属性与油气藏关系进行聚类分析 ,建立流体模型 ,可以确定油、气、水的区域分布。     

Antiproliferative Effects of St. John’s Wort,Its Derivatives,and Other Hypericum Species in Hematologic Malignancies

Hypericum is a widely present plant, and extracts of its leaves, flowers, and aerial elements have been employed for many years as therapeutic cures for depression, skin wounds, and respiratory and inflammatory disorders. Hypericum also displays an ample variety of other biological actions, such as hypotensive, analgesic, anti-infective, anti-oxidant, and spasmolytic abilities. However, recent investigations highlighted that this species could be advantageous for the cure of other pathological situations, such as trigeminal neuralgia, as well as in the treatment of cancer. This review focuses on the in vitro and in vivo antitumor effects of St. John’s Wort (Hypericum perforatum), its derivatives, and other Hypericum species in hematologic malignancies. Hypericum induces apoptosis in both myeloid and lymphoid cells. Other Hypericum targets include matrix metalloproteinase-2, vascular endothelial growth factor, and matrix metalloproteinase-9, which are mediators of cell migration and angiogenesis. Hypericum also downregulates the expression of proteins that are involved in the resistance of leukemia cells to chemotherapeutic agents. Finally, Hypericum and its derivatives appear to have photodynamic effects and are candidates for applications in tumor photodynamic therapy. Although the in vitro studies appear promising, controlled in vivo studies are necessary before we can hypothesize the introduction of Hypericum and its derivatives into clinical practice for the treatment of hematologic malignancies.