运用SOLO评价的“ 翻转课堂”教学设计

将SOLO评价引入翻转课堂, 致力于提高翻转课堂的教学效果, 并以电势能和电势为例, 运用SOLO 评价的“ 翻转课堂”形式进行了具体的教学方案设计     

Monte Carlo simulation on dielectric relaxation and dipole cluster state in relaxor ferroelectrics

The Ginzburg--Landau theory on ferroelectrics with random field induced by dipole defects is studied by using Monte Carlo simulation, in order to investigate the dipole configuration and the dielectric relaxation of relaxor ferroelectrics. With the increase of random field, the dipole configuration evolves from the long-range ferroelectric order into the coexistence of short-range dipole-clusters and less polarized matrix. The dipole-cluster phase above the transition temperature and superparaelectric fluctuations far below this temperature are identified for the relaxor ferroelectrics. We investigate the frequency dispersion and the time-domain spectrum of the dielectric relaxation, demonstrating the Vogel--Fulcher relationship and the multi-peaked time-domain distribution of the dielectric relaxation.     

浇铸边缘初应力的形成及其预防措施

环氧树脂试件浇铸工艺本试验严格按下述工艺浇铸环氧树脂试件: 1.用料的处理:环氧树脂与邻苯二甲酸二丁酯经80℃充分预热后混合,于80℃真空处理,驱除部分低分子挥发物。顺丁烯二酸酐在 ...