Based on the crystal plasticity theory and mathematical theory of statistics, the relation of flow stress fluctuation quantity to grain dimension as well as billet dimensions was built.
基于晶体塑性理论及数理统计理论，建立了流动应力波动幅度与晶粒尺寸和坯料几何尺寸间的关系。
2
NET reflection technology to implement dynamic management, by using Crystal Reports can we get accurate statistics and analysis.
NET反射技术实现试题的动态管理，测验成绩通过水晶报表实现的准确的统计分析。
3
The relation between screening constant and temperature has been obtained by the approximate eigenfunctions of electrons in a crystal and Fermi-Dirac statistics.