双扩散 double diffusion
- 摘要考虑半奇异摄动反应扩散问题的双线性有限元逼近。
The bilinear finite element approximation for semi-singularly perturbed reaction-diffusion problems is considered. - 摘要借助重整化群双参数湍流模型,建立扩散器内风流流动的控制方程组。
By virtue of RNG turbulent model, the control equation group of airflow flowing inside the diffuser was firstly built. - 结果:在亲水的高分子凝胶基质中,离子形式的双氯芬酸钠扩散速率大于分子形成的扩散速率。
RESULTS:The diffusive rate of diclofenac sodium from the two kinds of hydrophilic polymer gel was higher than that of diclofenac acid.
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