气敏薄膜的光学机理研究

本文根据光传输理论导出介导消光系数，折射率与介质电磁参数，光波频率，电偶极子浓度及迁移率等的关系，分析了光激发与增加气敏介质的氧吸附的规律，结合实验说明气敏薄膜的光学变化机制。     

Physicochemical properties of nanoparticles affect translocation across pulmonary surfactant monolayer

Interaction between nanoparticles (NPs) and pulmonary surfactant monolayer is one of the most important parts in NP-based pulmonary drug delivery system, which can affect the result of the inhaled nano-drugs and their potential efficacy. Here, we show how surface charge of NPs affects translocation across pulmonary surfactant monolayer with coarse-grained molecular dynamics simulations. The results reveal that the surface charge position of NPs can determine the fate of the inhaled NPs about whether they can have the ability of translocation across the pulmonary surfactant monolayer, which is that NPs with face surface charge can penetrate the pulmonary surfactant monolayer and NPs with edge surface charge cannot. Besides, dynamic process, phase state and the potential of mean force profiles further confirm this result. Moreover, compared to anionic NPs, there is a greater chance for cationic NPs to be adsorbed on the surface of the pulmonary surfactant monolayer, which can further decrease the thickness of the pulmonary surfactant monolayer and reduce the distance between charged NPs and the pulmonary surfactant monolayer. Our researches provide a novel simulation model of NPs on translocation across pulmonary surfactant monolayer and the study of NP-based pulmonary drug delivery system should consider the surface charge of NPs.     

小型直喷式柴油机燃烧室内喷雾碰壁的试验研究

本文采用透射光衰减法研究了小型直喷式柴油机燃烧室内喷雾碰壁特性，并与大气开放条件下和定容燃烧模型室内的研究结果进行了比较。在喷雾碰壁前后，当量喷雾锥角突然增大，然后减小。在正常涡流比条件下，燃烧室内涡流显著地影响壁面油柬的扩展，但未碰壁油束的弯曲量很小。着火前，在燃烧室内喷嘴附近混合气最不均匀。     

关于介质吸收与色散的振子特性参数

根据共振模型，讨论影响介质的吸收与色散的振子特性参数，得到关于振子阻尼系数的振子数的解析式。据此，利用介质的吸收谱曲线可以定量计算振子的阻尼系数和振子数，这对研究和改善介质的吸收和色散特性有重要意义。我们已用此方法研究气液浓度的光电特性。