NTE played a very significant role in the teacher education of US, and its affect to teacher certification, education colleges and teacher supply was analyzed.
NTE对美国的教师教育领域产生了巨大的影响,本论文分析了其对教师认证、教育学院和教师供给的影响。
The structure and morphology of the resulting powders were characterized by XRD, SEM and TEM, respectively. In situ X-ray diffraction measurements was used to analysis NTE property.
以XRD、SEM和TEM对产物结构及形貌进行表征,以原位X射线衍射分析粉体的负热膨胀特性。
After theoretical analysis, it is concluded that spin-glass which results from the hyperdispersion of si at micro scale is the reason for the broadening of the NTE operation-temperature window.
Based on the research results of other people, the developing situation of NTE in different times was introduced, and the impacting factors were analyzed.