We present a Monte Carlo (MC) method to simulate the scattering for medium within randomly distributed particles, discuss the convergence of this method by varying the size parameter ka, volume parameter η and calcul...We present a Monte Carlo (MC) method to simulate the scattering for medium within randomly distributed particles, discuss the convergence of this method by varying the size parameter ka, volume parameter η and calculation parameter Ni, then compare this method with the classical iteration method with the same parameters. The calculation results showed that this method has good convergence and accords with the iteration method while consuming less CPU time. At the end of this paper, this method is used to discuss the visual light scatter in the c-Si/α-Si films.展开更多
文摘汞污染已成为威胁全球作物生产的主要重金属污染源之一。microRNA(miRNA)是调控植物生长发育和非生物胁迫响应的重要因子,但其在单子叶植物汞胁迫响应中的作用尚不明确。为挖掘响应汞胁迫的关键miRNA,本研究对B73和郑58(Zheng 58,Z58)自交系幼苗在HgCl_(2)处理后的表型和差异表达的miRNA进行了分析。结果表明,B73对汞胁迫较郑58更敏感,miRNA166l是B73和Z58中共同鉴定到的下调表达的miRNA。为进一步验证miRNA166在汞胁迫中的作用,利用STTM(short tandem target mimic)技术获得了STTM165/166拟南芥转基因稳定株系。STTM166稳定系在HgCl_(2)处理后的表型与玉米幼苗在汞胁迫处理后的表型类似,叶片失绿萎蔫、根长变短。本研究证明miRNA166在玉米汞胁迫响应中有重要调控作用,对其作用机制进行更深入的研究有重要意义。
基金Project (No. 2004AA32G040) supported by the Hi-Tech Researchand Development Program (863) of China
文摘We present a Monte Carlo (MC) method to simulate the scattering for medium within randomly distributed particles, discuss the convergence of this method by varying the size parameter ka, volume parameter η and calculation parameter Ni, then compare this method with the classical iteration method with the same parameters. The calculation results showed that this method has good convergence and accords with the iteration method while consuming less CPU time. At the end of this paper, this method is used to discuss the visual light scatter in the c-Si/α-Si films.