情感是历史教学的灵魂。历史情感的培养应当在体验学习中实现。为了更好地激发历史情感,体验当作为一种教学理念时时渗透于日常各种历史学习方式之中。通过创设历史情境,运用丰
This paper develops a parameter-expanded Monte Carlo EM (PX-MCEM) algorithm to perform maximum likelihood estimation in a multivariate sample selection model. I
The present situation in Poland and Europe, regarding electric power generation by source, is discussed in the paper. The results of the implementation of EU co
The lattice Boltzmann method (LBM) is a numerical simplification of the Boltzmann equation of the kinetic theory of gases that describes fluid motions by tracki
采用乳液共沉法制备天然橡胶/生化木质素/白炭黑(NR/BCL/白炭黑)复合材料,研究了硅烷偶联剂四硫化双(三乙氧基丙基)硅烷(Si-69)用量对复合材料门尼黏度、硫化特性、物理机械
良好的英语交际能力是现代社会人才必须具备的素质之一。然而,当前非英语专业大学生普遍存在用英语交流困难的现实。本篇论文通过对上海松江大学城的七所高校进行问卷调查,了
通过调查+450中段、+474分段、+498分段溶洞分布情况,经过地表塌陷调查、各生产分段及中段岩溶调查、井下烟雾联通性试验等技术手段,预测+390中段溶洞发育情况及分布。为今后