当前社会,计算机对于每位老师来说都是一件普通教具,如何利用这件教具提高学生的学习效率也是每位教育工作者都在思考的问题。将视频教学片应用于教学过程可以更好的提高学习效率,文章论述了基于Premiere Pro CS5制作视频教学片的优势...当前社会,计算机对于每位老师来说都是一件普通教具,如何利用这件教具提高学生的学习效率也是每位教育工作者都在思考的问题。将视频教学片应用于教学过程可以更好的提高学习效率,文章论述了基于Premiere Pro CS5制作视频教学片的优势和技巧。展开更多
The two new compounds Cs5EuCl8· 14H2O(5∶ 1 type) and Cs2EuCl5· 4H2O(2∶ 1 type) were found and synthesized from CsCl EuCl3 11% HCl H2O quaternary systems by phase equilibrium method, and were characterized ...The two new compounds Cs5EuCl8· 14H2O(5∶ 1 type) and Cs2EuCl5· 4H2O(2∶ 1 type) were found and synthesized from CsCl EuCl3 11% HCl H2O quaternary systems by phase equilibrium method, and were characterized and measured by ultra violet absorption spectrometry and fluorescence spectrum. The results show that upconversion spectrum exhibit at 590nm and 610nm exited at 790nm, and the upconversion intensity increases with the EuCl3 ratio increasing in CsCl.展开更多
文摘The two new compounds Cs5EuCl8· 14H2O(5∶ 1 type) and Cs2EuCl5· 4H2O(2∶ 1 type) were found and synthesized from CsCl EuCl3 11% HCl H2O quaternary systems by phase equilibrium method, and were characterized and measured by ultra violet absorption spectrometry and fluorescence spectrum. The results show that upconversion spectrum exhibit at 590nm and 610nm exited at 790nm, and the upconversion intensity increases with the EuCl3 ratio increasing in CsCl.
