The result showed that, along with the prolonged preheating period, lower nucleation amount but larger crystal size of diamond was obtained.
得到了随预热处理时间延长，金刚石产量降低，粒度增粗、成核数量减少的结果。
It is put forward that, diamond nucleation amount can be controlled by controlling the growth of recrystallized graphite during the preheating period.
进一步指出在预热处理中可以通过控制再结晶石墨的生长，来达到控制金刚石核量的目的。
It is suggested that in preheating period of cocoon drying the temperature be raised rapidly. That is beneficial to shortening the drying process as well as improving the cocoon quality.
据此认为，蚕茧干燥预热阶段尽快升温，不仅有利于提高工效，而且也有利于改善茧质。
The corrected heat transfer coefficient is large in the high-speed heating process due to the local an uneven furnace atmosphere distribution, and is small in the preheating and holding period.
在高速升温段，由于局部炉气分布不均匀，修正换热系数较大；而在预热和保温段，计算所得的修正换热系数较小。
The corrected heat transfer coefficient is large in the high-speed heating process due to the local an uneven furnace atmosphere distribution, and is small in the preheating and holding period.
在高速升温段，由于局部炉气分布不均匀，修正换热系数较大；而在预热和保温段，计算所得的修正换热系数较小。
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