Based on the crystal plasticity theory and mathematicaltheoryofstatistics, 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
Finally several parameters for second generation infrared hot-box alarm criteria are determined by means of the probability theory and the mathematicalstatistics.
运用概率论和数理统计方法，确定了第二代红外线热轴判别标准的几个主要参数的计算机算法。
3
By model experiment, the parameters of slit holder are optimized turning to variance analysis theoryofmathematicalstatistics in order to guide engineering project.