随着航天回收系统应用需求越来越广，回收物质量也越来越大，对翼伞面积的要求越来越高，超大型翼伞开始受到广泛的关注，然而目前国内外对超大型翼伞的研究较少。对此，文章以超大型连续翼伞和超大型组合翼伞为研究对象，分别对其进行物理建模。采用计算流体力学（Computational Fluid Dynamics，CFD）的方法，基于k-epsilon湍流模型，分别计算在无下拉、单侧下拉、双侧下拉时超大型连续伞和超大型组合伞的气动特性。研究发现，超大型组合伞在组合处有很明显的气流补充，可以减缓流动分离的情况，增大失速迎角，更适合大攻角的飞行任务，适用范围更广。研究成果可以为以后超大型翼伞的选型提供一定的参考。

Photoacoustic imaging has been developed to image the immune study at the macro scale. Macrophages play diverse roles in the acute response to infection and tissue repair. However, macrophages activities in acute inflammation at the microscopic level still remain challenging. In this work, we proposed optical-resolution photoacoustic microscopy to promptly monitor the labeled macrophages activities in normal and inflammatory groups. The result showed that many labeled macrophages emerged around the vessels firstly, then exuded into tissues, and finally disappeared in the inflammatory group injected with labeled macrophages. In summary, our method allows us to exactly image and track the immune cells of inflammatory diseases.