After the structure separation completed, the grain size and shape factor increased with the increase of the heating time.
组织分离完成之后，晶粒的尺寸和形状系数随时间逐渐增大。
BP neural network model was put forward for the grain size of solidified structure.
提出了凝固组织晶粒尺寸BP神经元模型。
From the aspects of grain size, impurity shape and size, structure type and so on, the control or influence factors of pipeline toughness are discussed.
本文从晶粒尺寸、夹杂物形态和大小以及组织结构类型等几个方面论述了管线钢韧性的控制或影响因素。
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