Sherry Zhefang Zhou

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Ocular biometry in 255 eyes (131 subjects) with CT scan revealed that the length of the antero-posterior axis was 23.63 +/- 0.92 mm in hyperopia, 24.62 +/- 0.38 mm in emmetropia and 26.68 +/- 0.75 mm in myopia, and the length of the horizontal transverse axis was correspondingly 24.61 +/- 0.53 mm, 24.91 +/- 0.37 mm and 25.12 +/- 0.73 mm. There were(More)
Multigrid methods with nested subspaces and inherited forms are analyzed in an abstract framework that permits application to linear systems of the type that have to be solved at each time level in time-stepping methods for nite element approximations of parabolic problems. Convergence rates that are independent of the space and time steps are obtained in(More)
This work presents a numerical study on the solid particles conveyance behavior of a shale shaker used in oil production. The particle flow is simulated by discrete element method based on Soft-Sphere model and Hertz-Mindlin contact model. Two important factors, conveyance velocity and filter ratio, are selected to describe the working performance of shale(More)
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