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A water-soluble chitosan-coated oxidized regenerated cellulose (ORC) gauze was prepared by the oxidation of a viscose gauze with NO2/CCl4 and subsequent treatment with a solution of chitosan in aqueous acetic acid and finally neutralization with NaOH/C2H5OH solution. A series of C6 ORC samples with different –COOH content were prepared and coated by chitosans (CTS) with different molecular weight...
In the paper, we propose phase type (PH) distribution service time working vacation scheme cyclic polling system for WDM. This system consists of multi-queues (terminals). Using the decomposition approach, each queue is analyzed as a single server queue with PH distribution service time working vacation scheme which works at a different rate rather than completely stops during the vacation polling...
Sensitivity analysis and topology optimization of microstructures using strain energy-based method is presented. Compared with homogenization method, the strain energy-based method has advantages of higher computing efficiency and simplified programming. Both the dual convex programming method and perimeter constraint scheme are used to optimize the 2D and 3D microstructures. Numerical results indicate...
An alternative strain energy method is proposed for the prediction of effective elastic properties of orthotropic materials in this paper. The method is implemented in the topology optimization procedure to design cellular solids. A comparative study is made between the strain energy method and the well-known homogenization method. Numerical results show that both methods agree well in the numerical...
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