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In this paper, by the transparent-component-decimation (TCD) method we obtain three kinds of new basic- components (BCs) through simplifying and decomposing the BCs of three-component Thue-Morse (3CTM) sequence. Based on these new BCs we propose a type of basic-structural-units (BSUs) and investigate the optical transmission of the one-dimensional (1D) superlattices composed of these BSUs. It is found that if the substrates of the 1D BSU superlattices are certain, the optical transmission at the central wavelength (CW) will be determined completely by the number and the type of BSUs and has nothing to do with the marshalling sequence. In particular, if the substrates are identical, the numbers of different types of BSUs are all the same and the middle two elements of BSUs constitute a cycle, then no matter whether the system is periodic, or quasiperiodic, or aperiodic, or unordered, or even random, it will be transparent at the CW. The conclusion is confirmed by the numerical results. Similar to the even layers of neighbourhood identical elements in TCD method, such a kind of optical BSU subsystem can also be decimated from the chain in the process of transmission investigation. There would be a potential application in the designing of some interesting optical devices. 相似文献
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高效液相色谱法测定糖脂双降茶中淫羊藿甙的含量 总被引:4,自引:0,他引:4
建立了高效液相色谱法测定糖脂双降茶中淫羊藿甙含量的方法。采用ODS柱 ,以甲醇 水 (体积比为 60∶4 0 )为流动相 ,用紫外检测器于 2 70nm处检测。结果表明 ,淫羊藿甙的质量浓度在 0 1g/L~ 0 5 g/L范围内与色谱峰的峰面积呈良好的线性关系 (r =0 9993 ) ,回收率为 10 1 0 %~ 10 1 7% ,RSD为 1 6%~ 2 7% (n =3 )。方法快速、简便、准确 ,结果稳定 ,重现性好 ,可推荐其作为质量检验的一个定量方法。 相似文献
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Enhancement in solar hydrogen generation efficiency using InGaN photoelectrode after surface roughening treatment with nano-sized Ni mask 下载免费PDF全文
A significant enhancement in solar hydrogen generation efficiency has been achieved by inductive coupled etching (ICP) surface roughening treatment using nano-sized nickel mask. As much as 7 times improvement of photocurrent is demonstrated in comparison with a planar one fabricated from the same parent wafer. Under identical illumination conditions in HBr solution, the incident photon conversion efficiency (IPCE) shows an enhancement with a factor of 3, which even exceed 54% at 400 nm wavelength. We believe the enhancement is attributed to several facts including improvement in absorption, reacting area, carder localization and carrier lifetime. 相似文献
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