“结构-隔热”一体化复合墙板(SIW墙板)是一种新型粮食平房仓墙体构件,由内、外叶混凝土墙和保温板通过连接件组成。为研究粮食侧压力作用下SIW墙板力学性能的可靠性及随机参数的灵敏度,建立了有限元分析模型,以内叶墙挠度和混凝土强度...“结构-隔热”一体化复合墙板(SIW墙板)是一种新型粮食平房仓墙体构件,由内、外叶混凝土墙和保温板通过连接件组成。为研究粮食侧压力作用下SIW墙板力学性能的可靠性及随机参数的灵敏度,建立了有限元分析模型,以内叶墙挠度和混凝土强度不同控制条件的功能函数为失效准则,采用蒙特卡洛拉丁超立方抽样方法,对影响SIW墙板承载力的随机输入参数按分布类型开展了100000次抽样及计算,分析了SIW墙板的可靠性,量化了随机参数的灵敏度。研究结果表明:有限元模拟结果与试验结果相差不足5%,功能函数失效概率分别为P f1=5.02×10^(-2)、P f 2=3.30×10^(-4),建立的有限元模型是有效的,对比规范其可靠度均在安全范围之内,应主要考虑影响混凝土强度失效较大的参数;粮食重力密度、混凝土弹性模量和保温板弹性模量的变化对SIW墙板混凝土强度可靠性的影响较大。研究成果为SIW墙板结构设计及优化提供了参考依据。展开更多
The interaction between β-K 4H 3 [SiW 9O 37(CpTi) 3]·11H 2O and DNA was investigated by agarose gel electrophoresis. The results suggest that β-K 4H 3[SiW 9O 37(CpTi) 3]·11H 2O can degrade the genomic DNA....The interaction between β-K 4H 3 [SiW 9O 37(CpTi) 3]·11H 2O and DNA was investigated by agarose gel electrophoresis. The results suggest that β-K 4H 3[SiW 9O 37(CpTi) 3]·11H 2O can degrade the genomic DNA. The treatment of plasmid DNA with β-K 4H 3 [SiW 9O 37(CpTi) 3]·11H 2O resulted in a fast moving band in front of the three normal conformations(super coiled DNA, linear DNA and relaxed circular DNA) in agarose gel electrophoresis . These results indicate that this chemical material may have the ability to specifically cleavage DNA or to alter conformation of DNA molecules.展开更多
文摘“结构-隔热”一体化复合墙板(SIW墙板)是一种新型粮食平房仓墙体构件,由内、外叶混凝土墙和保温板通过连接件组成。为研究粮食侧压力作用下SIW墙板力学性能的可靠性及随机参数的灵敏度,建立了有限元分析模型,以内叶墙挠度和混凝土强度不同控制条件的功能函数为失效准则,采用蒙特卡洛拉丁超立方抽样方法,对影响SIW墙板承载力的随机输入参数按分布类型开展了100000次抽样及计算,分析了SIW墙板的可靠性,量化了随机参数的灵敏度。研究结果表明:有限元模拟结果与试验结果相差不足5%,功能函数失效概率分别为P f1=5.02×10^(-2)、P f 2=3.30×10^(-4),建立的有限元模型是有效的,对比规范其可靠度均在安全范围之内,应主要考虑影响混凝土强度失效较大的参数;粮食重力密度、混凝土弹性模量和保温板弹性模量的变化对SIW墙板混凝土强度可靠性的影响较大。研究成果为SIW墙板结构设计及优化提供了参考依据。
文摘The interaction between β-K 4H 3 [SiW 9O 37(CpTi) 3]·11H 2O and DNA was investigated by agarose gel electrophoresis. The results suggest that β-K 4H 3[SiW 9O 37(CpTi) 3]·11H 2O can degrade the genomic DNA. The treatment of plasmid DNA with β-K 4H 3 [SiW 9O 37(CpTi) 3]·11H 2O resulted in a fast moving band in front of the three normal conformations(super coiled DNA, linear DNA and relaxed circular DNA) in agarose gel electrophoresis . These results indicate that this chemical material may have the ability to specifically cleavage DNA or to alter conformation of DNA molecules.
