摘要：An accurate measurement of the refractive index is necessary for the optical design of both deep ultraviolet laser diodes and light-emitting diodes. Generally, the refractive indices along different crystallographic axes of anisotropic thin films are measured using variable angle spectroscopic ***, there are still some limitations concerning this method. Here we proposed a potential method to measure the band edge refractive index of wide bandgap semiconductor. An aperiodic oscillation emission phenomenon due to the Fabry-Perot effect was observed in the fluorescence spectrum of an AlN film with a thickness of 1500 nm. Based on the characteristics of the fluorescence spectrum and the definition of Fabry-Perot effect, we obtained the ordinary refractive index of the AlN thin film near the band edge directly. This refractive index measurement method is a supplement to the variable angle ellipsometry,and it is a more direct and effective method for transferred film and thinner samples to measure the fluorescence spectrum.

摘要：双连拱隧道可减小隧道线间距,空间利用率高,有效地节省工程投资,但存在施工工序复杂、围岩易受扰动、施工难度大、工期较长等特点;如何优化施工工序、控制围岩变形、确保施工质量是当前双连拱隧道设计和施工的重与难点。长沙市轨道交通5号线一期工程毛竹塘站存车线双联拱隧道工程,设计采用“五导洞+台阶法开挖”,该工法可连续施工作业,有效缩短工期,从而降低造价。为探讨该工法开挖对初支结构受力和地面沉降的影响,通过数值模拟分析与现场实测验证了该工法的可行性和安全性,可为同类型工程提供参考。

摘要：随着人们户外运动的增加和健康意识的增强,长效防蚊抑螨抑菌多功能面料,已成为人们亟需的新产品。文中阐述了新产品设计开发思路及研究内容,研究了防蚊驱蚊、抑螨防螨、抗菌抑菌单项整理工艺及多功能一体化的理论依据和新产品生产的可能性,并给出开发长效多功能、耐洗次数高的工艺技术及新面料的各项测试结果。实践结果表明,新产品对金黄葡萄球菌抑菌率>95.0%,大肠杆菌抑菌率>96.0%,螨虫驱避率>85.0%,蚊虫驱避率>66.0%。