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A kinetic Monte Carlo (kMC) simulation is conducted to study the growth of ultrathin film of Co on Cu(001) surface. The many-body, tight-binding potential model is used in the simulation to represent the interatomic potential. The film morphology of heteroepitaxial Co film on a Cu(001) substrate at the transient and final state conditions with various incident energies is simulated. The Co covered area and the thickness of the film growth of the first two layers are investigated. The simulation results show that the incident energy influences the film growth and structure. There exists a transition energy where the interracial roughness is minimum. There are some void regions in the film in the final state, because of the influence of the island growth in the first few layers. In addition, there are deviations from ideal layer-by-layer growth at a coverage from 0 - 2 monolayers (ML). 相似文献
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目前,我国油气资源供求矛盾日益突出,加强对低品位油气资源开发,对缓解我国油气资源短缺的局面,实现油气工业的可持续发展具有重要意义。本文在概述我国低品位油气资源概念和开发现状的基础上,深入剖析了我国低品位油气资源开发面临的主要问题,包括税收过重、关键技术缺乏、体制机制不健全、环境污染等方面。针对这些问题提出了促进我国低品位油气资源开发的相应对策和建议。 相似文献
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根据透明质酸合酶基因序列及内参照GAPDH基因序列。设计目的基因和内参照的引物序列,探讨了PCR体系中适宜的退火温度、循环次数和Mg^2 浓度。实验结果显示,要保证半定量RT—PCR的准确性与可靠性,目的基因及内参照基因的退火温度均可选择50℃,它们的Mg^2 浓度均选择1.5mmol/L,目的基因的循环次数选择30次,内参照基因的循环次数选择35次。在上述适宜的RT—PCR条件下,测定兽疫链球菌中透明质酸合酶mRNA水平。 相似文献
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网商是当前经济时代发展最为迅速的群体,网商的诞生是我国电子商务发展的必然结果。纵观近几年我国互联网的快速发展进程,网购已经成为了我国人们日常消费的重要方式。网商的发展与消费者有着密切的关系,研究网商的发展趋势实际上就是分析消费行为特征,在此基础上满足消费者的消费需求。本文就是在此背景下,探索当前互联网经济背景下的消费者的消费行为特征,并详细分析网商的发展趋势,为我国网商的稳定发展提供指导。 相似文献