We investigated the structural evolution of Polystyrene films at various conditions through multi-wavelength ellipsometry. We studied the thickness of film dependent of the process of swelling/shrinking, and the influence of the intensity of atmosphere，combining with PM (polarization microscope) to characterize the surface morphology. Results indicated that the increase and reduction of the film thickness are non-linear. Maximum swelling ratio and the variation of film thickness depend on the initial thickness of film and the intensity of atmosphere. Furthermore, the results demonstrated that in-situ multi-wavelength ellipsometry is an unique means to investigate the behavior of swelling and shrinking of film.

At present the study on the application of the topology optimum design in scraper conveyor is still under development. In this paper the topology optimization based on the homogenization method is applied to the design of the baffle on the scraper conveyer, which can provide a valuable conceptual design scheme for the selection of the baffle pattern. In conjunction with the homogenization theory and Finite Element Method (FEA), the mathematical models for designing the baffle by the minimizing mean compliance are developed in this paper. By applying the topology optimum design to the baffle, the topology optimization based on the homogenization method is proved to be reliable and practical at the conceptual design stage of baffle.