摘要：(GO/TiO2)N(GO represents graphene oxide,and N represents the period number of alternate superposition of two dielectrics)onedimensional photonic crystal with different lattice constants was prepared via the sol–gel technique,and its transmission characteristics for photocatalysis were *** results show that the lattice constant,filling ratio,number of periodic layers,and incident angle had effects on the band *** the lattice constant,filling ratio,number of periodic layers,and incident angle were set to 125 nm,0.45,21,and 0°,respectively,a gap width of 53 nm appeared at the central wavelength(322 nm).The absorption peak of the photocatalyst at 357 nm overlapped the blue edge of the photonic band gap.A slow photon effect region above 96%reflectivity *** degradation rate of tetracycline in(GO/TiO2)N photonic crystal was enhanced to 64%within 60 ***,the degradation efficiency of(GO/TiO2)N one-dimensional photonic crystal was effectively improved compared with those of the GO/TiO2 composite film and GO/TiO2 powder.

摘要：For a 100 GHz DWDM angle-tuned filter with low polarization dependent loss,the insertion loss and the Gaussian-transformation tendency of the transmission spectrum will become more serious as the incident angle is increased. It is because of that the optical path and the transmission modes of the thin film filter will change when the incident angle is varied. According to the thin film matrix theory,the analysis model is established,the displacement change of the transmission field is simulated,and a dynamic compensation fitting is also designed and fabricated in the paper. The experimental results show that it can effectively reduce the insertion loss and the phenomenon of Gaussian process. Using the compensation fitting,the tunable range of the filter is at about 20 nm which coincides with the theoretical design.

摘要：苹果无袋栽培是一种旨在替代套袋栽培的新型栽培管理模式。通过优化果树生长环境和调整管理措施,以省略果实套袋的过程,降低生产成本,提高果实品质,促进果业可持续发展。该文综述国内外苹果无袋栽培的研究进展,包括其优势、挑战,以及对未来发展的建议,为推广苹果无袋栽培技术奠定基础。

摘要：Enterocutaneous fistulas(ECFs) are great challenges during the open abdomen. The loss of digestive juice, water-electrolyte imbalance and malnutrition are intractable issues during management of ECF. Techniques such as "fistula patch" and vacuumassisted closure therapy have been applied to prevent contamination of open abdominal wounds by intestinal fistula drainage. However, failures are encountered due to high-output fistula and anatomical complexity. Here, we report 3 D-printed patient-personalized fistula stent for ECF treatment based on 3 D reconstruction of the fistula image. Subsequent follow-up demonstrated that this stent was well-implanted and effective to reduce the volume of enteric fistula effluent.

摘要：文章通过对索契冬奥会开幕式表演内容的梳理和分析,对俄罗斯传统文化的内涵与精髓进行解读,使读者对俄罗斯文化的历史渊源有所了解,对索契第22届冬季奥运会开幕式中俄罗斯传统文化创新与发展有进一步深刻的体会和理解。

摘要：对窄带滤光片的倾斜入射特性作了分析.斜入射时其透射通带和峰值会向短波方向移动,透射曲线的稳定性跟滤光片的间隔层结构相关,多腔间使用相同的间隔层可以保证斜入射时有稳定的峰值透射率和带宽,利用该特点可以制备角度调谐窄带滤光片.透射光S和P偏振分量的中心波长随入射角度的增大出现分离现象,产生较大的偏振相关损耗.通过搭配不同厚度的高低折射率材料作为间隔层,改变其有效折射率,使其两个偏振分量的中心波长实现重合.设计了符合密集波分复用(Dense Wavelength Division Multiplexing,DWDM)系统要求的低偏振相关损耗四腔窄带角度调谐滤光片膜系,其可调谐范围达20nm以上,并评估了所设计角度调谐滤光片的调谐性能.

摘要：根据薄膜窄带滤光片在倾斜入射时的特性,通过改进间隔层膜系结构调整其等效折射率,可以设计出具有稳定透射峰值和带宽的角度调谐窄带滤光片.倾斜入射时窄带滤光片透射光的S和P偏振分量的中心波长会随着入射角度的增大出现分离现象,产生较大的偏振相关损耗.分析了偏振分离现象出现的原因和其与滤光片等效折射率的关系,提出了消除偏振分离现象的方法.根据薄膜矩阵理论建立了分析模型并提出了一种该可调滤光片的设计方法,根据开发的程序优化设计并制备了一组用于100 GHz密集波分复用(DWDM)系统的低偏振相关损耗的四腔角度调谐窄带滤光片,实验结果证明其满足设计要求并有接近20 nm的可调范围.

摘要：倾斜入射时滤光片的透射光会出现光路偏移以及光斑模场的形变,所以在测试制备的100GHz低偏振相关损耗的角度调谐滤光片时其透射光谱的插入损耗和波形的高斯化现象会随着入射角度的加大而迅速增加。根据薄膜矩阵理论建立模型模拟了透射模场的偏移变化,并设计和制备了一种动态补偿装置,在实验中证明该设计能在保持光准直器位置固定的情况下有效地减少透射波形的损耗和高斯化现象,使得角度调谐滤光片能达到理论设计中20nm的可调谐范围。

摘要：结合武汉市某基坑支护工程未能按设计图纸施工,在基坑开挖之前及时对基坑进行加固设计,按加固设计后的图纸施工,基坑安全运营,没有出现险情。实践证明,该加固设计是必须的,加固达到预期效果,可为其它类似工程提供应用参考。

摘要：提出了一种基于B-spline网络和动态面控制方法的过失速机动飞行控制律设计方法。针对飞机气动力和力矩的非线性和不确定性,引入具有学习和记忆功能的B-spline网络,自适应逼近飞机的气动力和力矩,加快参数收敛速度,改善系统的过渡过程性能。动态面飞行控制律消除了Backstepping设计方法中由于对虚拟控制反复求导而导致的复杂性问题。基于Lyapunov稳定性定理证明了闭环系统的所有信号半全局一致毕竟有界,并且通过适当选择设计参数,跟踪误差可收敛到原点的一个小邻域内。大迎角过失速机动飞行的数值仿真验证了方法的有效性。