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体育场管桁架钢罩棚临时支撑整体卸载 被引量:5
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作者 敖明华 魏焱 +2 位作者 朱吉 韦文鑫 周希敏 《安装》 2014年第11期31-32,64,共3页
钢结构安装过程常需要设置临时支撑,其拆除过程是结构在临时支撑受力状态下转换到自身结构体系自由状态的过程,即卸载过程。本文介绍了刚果布体育场管桁架钢罩棚临时支撑整体卸载案例。该工程在结构分析计算的基础上,按照等量微量下降... 钢结构安装过程常需要设置临时支撑,其拆除过程是结构在临时支撑受力状态下转换到自身结构体系自由状态的过程,即卸载过程。本文介绍了刚果布体育场管桁架钢罩棚临时支撑整体卸载案例。该工程在结构分析计算的基础上,按照等量微量下降的原则,分批次、分阶段通过千斤顶拟合同步卸载,实现了荷载的平稳转移。该技术安全经济,可在同类工程中推广应用。 展开更多
关键词 钢罩棚 整体卸载 同步卸载 微量分级 模拟分析
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Scanning Electron Microscopically Study of Sesame Seeds Infected with Macrophomina phaseolina
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作者 D. A. El-Wakil A. M. Mahdy R. Z. El-Menshawy 《Journal of Agricultural Science and Technology(A)》 2011年第1X期96-99,共4页
The direct impact of seed-borne fungi on seed is considerable. Many fungi are serious parasites of seed primordial and maturing seeds and reduce yield of seed both quantitatively and qualitatively. Other fungi, includ... The direct impact of seed-borne fungi on seed is considerable. Many fungi are serious parasites of seed primordial and maturing seeds and reduce yield of seed both quantitatively and qualitatively. Other fungi, including saprophytes and very weak parasites, may lower the quality of seeds by causing discoloration which may seriously depreciate the commercial value of seeds, particularly of grain when graded for consumption. Studies by using scanning electron microscopy (SEM) confirmed the importance of the seed coat, and seed cells as infection sites as well as location of the mycelium of the investigated fungus. Macrophominaphaseolina The present investigation is undertaken to study the colonization, infection and fungal establishment on different sesame seed parts by (SEM). A successful colonization of M. phaseolina to seed tissues was also detected. Different forms of pycnidial shapes were also observed. 展开更多
关键词 Scanning electron microscope Macrophomina phaseolina sesame seed
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