典型砖混结构倒塌实例分析及对策研究

本文通过１０起典型倒塌实例，对砖混结构的严重事故，从设计，施工等方面进行了综合分析，并对事故的预防提出了一些认识 。     

旋转体侧面积计算的一般公式

本文给出闭区间上光滑曲线绕任一直线旋转所产生的旋转体的侧面积的一个方便实用的计算公式．     

Protein folding: concepts and perspectives

In this review, the main concepts of protein folding, as deduced from both theoretical and experimental in vitro studies, are presented. The thermodynamic aspects from Anfinsen's postulate, Levinthal's paradox to the concept of folding funnel as proposed by Wolynes and coworkers are described. Concerning the folding pathway(s), particular attention is brought to bear on the early steps that initiate the process in the light of the results of the fast and even ultrafast techniques presently being used. The role of structural domains as folding units is discussed. Last, from the recent studies, it can be concluded that the main rules deduced from the in vitro folding studies are valid for the folding of a nascent polypeptide chain in vivo.     

用并矢格林函数方法求解四层丛林模型的场:Ⅱ应用部分(英文)

本文用矢格林函数方法求解了在四层丛林模型中任意极化的电偶极子的电磁场。给出了侧面波决定的远区场及使该场有最大激励的偶极子的最大入射角。     

The pattern of the mechanosensory lateral line on the caudal fin of the two deep‐water gobiid fishes Deltentosteus collonianus and Deltentosteus quadrimaculatus (Teleostei: Gobiidae)

The most common pattern of the lateral line system on the caudal fin of Gobiidae is characterized by three longitudinal rows of free neuromasts. Deltentosteus collonianus and Deltentosteus quadrimaculatus are two benthic Atlantic–Mediterranean gobiid fishes with additional rows on the caudal fin. In these species the caudal fin is more densely covered by the lateral line system compared to the usual status in Gobiidae. An increase of longitudinal neuromast rows occurs rarely in gobiid fishes and is only known in a few species of Gobiidae with a pelagic lifestyle. Both Deltentosteus species show numbers of neuromast rows on the caudal fin between the plesiomorphic three and the advanced eight rows of pelagic gobies. This intermediate position allows discussion of the existence and the characteristics of an underlying pattern in the increase of the number of longitudinal neuromast rows and adaptation to habitat conditions in Gobiidae.     

浅析隧道坍方中水泥-水玻璃双液注浆施工工艺处理及应用

介绍了隧道坍方中水泥-水玻璃双液注浆施工工艺处理及其应用。     

采用钢轨棚架法处理隧道通顶塌方

本文介绍了处理隧道通顶塌方的一种施工方法——钢轨棚架法，该方法利用轻轨作为主棚架，对稳定山体及保证施工安全起到了至关重要的作用     

高填方加筋路堤的受力性能及质量保证措施

高填方加筋路堤是近期迅速发展的一种保证高填方工程质量的优良施工方案。路堤在加筋后，能很好的提高土的抗剪承载力和整体稳定性，减小其变形量，可有效的防止路基失稳破坏，保证其使用要求和质量安全。     

丹霞地貌概念释义

丹霞地貌的概念自创立之初至今,众说纷纭,莫衷一是,对其误解目前甚有扩大化的明显趋势。文章通过文献和野外调研,追溯了丹霞地貌的缘起,梳理了它的内涵,得出如下认识:(1)丹霞山地形,起初为描述红层即丹霞层(后称丹霞组)而总结出来的颜色+地形特征的地层单位野外识别标志,属地层学范畴;后因地貌奇观等观赏价值才转为地貌学研究的范畴;引起歧义的关键所在是修饰地貌的“丹霞”二字被误解为红色或红黄色的形象。它实为广东丹霞山一带山地的名称,即丹霞地貌是“丹霞山式地貌”的简称。(2)该地貌作为一种特殊的地貌类型,具顶平、身陡、麓缓的显著特征,其成因条件必然具有一定的特殊性:一是厚层的红色碎屑岩,且含有可溶钙质胶结物和砾石;二是岩层产状近水平,且发育两组高角度相交的近乎直立的构造节理;三是形成时代较新,仍处于发育的壮年期。(3)红黄色砂岩中的雕岩谷(如陕北延安雕岩谷和美国羚羊谷)以及褶皱倾斜互层岩石中的彩丘(如张掖彩丘和秘鲁彩虹山)的成因和形貌特征与丹霞地貌迥异,即使侵蚀继续进行,也不可能发育成丹霞地貌。因此,丹霞地貌的概念应回归到1983年《地质辞典》的定义,切不可继续张冠李戴,失去科学的严谨性与合理性。     

基于结构鲁棒性提升的隔板贯通节点加固构造

为提高结构的鲁棒性,针对传统矩形钢管柱隔板贯通式栓焊连接构造,提出了一种加固型栓焊盖板连接构造及其设计方法,并进行了数值模拟分析,该分析考虑了断裂模拟及裂后路径跟踪.结果表明,加固型栓焊盖板连接构造能够提高下翼缘连接区域传力失效前梁柱子结构的竖向变形能力,并充分发挥梁内轴向拉力产生的悬链线效应,进而使梁柱子结构提供更大的竖向承载力,可用于提高结构抗连续倒塌能力的加固改造.