科技英语试题 2015年.docxVIP

科技英语试题 2015年 英译中 An enhancement of the Coulomb interaction occurs in one-dimensional systems because of limited screening, and single-walled carbon nanotubes (SWCNTs) are an ideal model system where such an effect manifests itself. Electron-hole pairs form tightly bound excitons with a binding energy of a few hundred meV, which amounts to a significant fraction of the band-gap energy. Such a large binding energy warrants the stability of excitons even at room temperature, and with exciton size being a few nm , strong fields on the order of 100??V/μm would be required for exciton dissociation. In contrast to the expectation that the generation of free carriers from charge-neutral excitons would be difficult, photocurrent and photovoltaic measurements have proved to be simple and convenient tools for studying the properties of SWCNTs. Not only have they been used to measure potential landscapes, optical absorption properties, and ultrafast carrier dynamics, they have been instrumental in investigating unique effects that occur in SWCNTs, such as band-gap renormalization and multiple electron-hole pair generation. It has been a perplexing situation where exciton dissociation has not been brought up as an obstacle for performing these experiments. In interpreting the results, quantitative discussion on the dissociation process has been scarce, and in some cases the excitonic effects have not been considered at all. 中译英 量子点（QDs）和半导体基纳米光腔的耦合系统是时下研究的热点之一，这主要是由于该器件于量子信息处理和量子计算中的潜在应用。其中，以量子点为代表的固态量子发射器提供了优良的可拓展性与长相干两能极系统，而光子晶体纳米光腔（PhCs）的可拓展性极强，不仅能与量子电子系统耦合，还能与其他镜面结构和波导等构成先进的光学器件。具体来说，将单量子点嵌入纳米光腔系统后，受到光腔模光子态密度的影响，量子点发射的光将与特定的光场模耦合从而改变单光子的输出效率。然而，由于高质量单量子点用Stranski–Krastanov 生长方式的空间随意性，前述精密耦合器件的实现还是有相当难度的。 英文写作 大数据（Big Data）已经发展为贵州省重点支撑产业，你对于该产业发展有何建议？题目自拟，1000字以上，要求按科学论文格式，有摘要，有介绍，有正文，有总结。