铁路

The hot cracking theory about solidification contraction and its compensation was thoroughly proved through experiments carried out for Al-Cu alloys in semi-eontinutive directional solidification vaecume device.

根据热裂纹形成的凝固收缩补偿理论，定义了反映合金热裂倾向的不可补缩温度区间、热裂倾向系数、凝固末期收缩速率和不可补缩长度等指标。

Up to now, the whole operational speed of existent CNN chips has reached Tera magnitude, which can great improve the speed and real time of video processing.

目前已有的CNN芯片的整体运算速度都已达到了Tera级10~(12，即兆兆级，其对于提高视频处理的速度和实时性是不言而喻的。