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高永贵 《西安建筑科技大学学报(自然科学版)》1994,(4)
根据两次模型群桩试验的结果,对黄土中群桩承台─桩─土共同作用做了分析,井提出了黄土中低承合群桩基础承载力的经验公式。 相似文献
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不管你意识到与否,书写已经成为工作和生活的重要组成部分,读书是为了更好地写作,以写促读本质上是一种写作模式,而非字面意义上的阅读模式。本文对这种写作模式进行了全新的解读,并从写作思维层面探讨了具体的操作路径。 相似文献
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针对Ad Hoc网络,在分析AODV单径路由协议的基础上,结合路径稳定的衡量——熵,利用路由请求包唯一性和标志位信息,提出一种开销最小节点不相交的多径路由算法ENDMAODV.该算法能够发现多条节点不相交路由路径,并从中选取2条稳定性较好的路径.仿真结果表明,ENDMAODV协议在路径重构次数、分组投送率、平均控制开销和端到端时延方面表现出较优性能,为自组织网络多径路由算法的设计提供了新思路. 相似文献
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西安地区深基坑边坡支护设计探讨 总被引:1,自引:0,他引:1
针对西安地区深基坑支护中,普遍采用的钢筋混凝土灌注排桩设计有关问题作了探讨,对悬臂桩和锚杆支护桩两种桩型作了对比,并例举了西安市钟鼓楼广场深基坑锚杆支护桩的设计实例. 相似文献
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Immobilization metal affinity chromatography (IMAC)and size-exclusive chromatography (SEC)have been widely used in the purification of recombinant protein.In order to apply the column chromatography to the separation and purification of the gene recombinant with histidine-tags,the column chromatographic separation characteristics of N-terminal histidine-tagged (N-AxCeSD)and C-terminal histidine-tagged (C-AxCeSD)gene recombinant protein AxCeSD,one of the subunit involved in the cellulose synthesis in Acetobacter xylinum were studied.In the ring-shaped three-dimensional structure of AxCeSD,N-terminal histidine-tags were located in the inner of ring,while C-terminal histidine-tags were located in the outer.A higher imidazole concentration was necessary for eluting the C-AxCeSD from the IMAC column due to the C-terminal histidine-tags had stronger chelating interaction with the Ni2+ on the IMAC media.Moreover,the retention time for eluting C-AxCeSD from the same SEC gel column was shorter than that for N-AxCeSD,because the larger protein homolog was formed in the C-AxCeSD solution through the inter-molecular hydrogen bonds between the C-terminal histidine-tags. 相似文献