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The influence of viscoelastic behavior of polybutylene terephthalate (PBT) on reliability of the thermal contact of a spotlight module is evaluated. The contact between a module and the heat sink is evaluated using non-linear finite element model. The viscoelastic behavior of PBT was obtained under multiple frequencies from single cantilever DMA experiments. The relevant viscoelastic parameters (i...
The influence of viscoelastic behavior of polybutylene terephthalate (PBT) on reliability of the thermal contact of a spotlight module is evaluated. The contact between a module and the heat sink is evaluated using non-linear finite element model. The viscoelastic behavior of PBT was obtained under multiple frequencies from single cantilever DMA experiments. The relevant viscoelastic parameters (i...
We study the problem of estimating small failure probabilities for elastic random material described by a one dimensional stochastic elliptic differential equation with certain external forcing and boundary conditions. Gaussian random functions are used to model the spatial variation of the material parameters. The failure event of the bulk material is simply characterized by the exceeding of certain...
To extract polysaccharide of Camellia Cake, cellulase-assist method was used. The extraction conditions were: temperature 50°C; time 3h; adding amount of cellulase 0.35%. The extract rate of camellia cakes polysaccharide is 26.62%, The adequacy of this model was confirmed.
The set theory of fuzzy has been introduced to the network education evaluation in order to determine the grade standard and weights of performance evaluating indicator. And the implementation of network education evaluation is discussed.
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