| 4 | 板带轧制条件下X70管线钢的动态相变显示文摘摘要在900℃条件下对X70管线钢进行板带轧制的扭转模拟试验,采用的道次应变为0.4,应变率为1s-1,道次间隔为1.0S、10.0S、20.0s和30.0s。通过流变曲线积分,计算出适于每一个道次的平均流变应力(MFS)。平均流变应力随道次数而降低。说明动态相变和动态再结晶均发生于应变期问。用双微分法确定动态相变起始时的临界应变,从第2道次至最终道次,下降4~5%。模拟轧制道次后残余的动态形成的铁素体体积分数随道次间隔而下降。这是因为在较长的道次间隔下.变回奥氏体的铁素体数量有所增加。正相变被认为是切变型的.而在保温期间重新转变为奥氏体则是通过扩散机制而发生的。 | Samuel Filguriras Rodrigues 刘友存 | 2017 | 钢铁译文集2017，0，2： | 0 |
| 6 | Dynamic Balance in Children With Trisomy 21:A Pilot Study显示文摘At age 5,children with trisomy 21 have roughly 2 years of delayed motor development.We aimed to verify if children with trisomy 21(AD)(N=6,7.67±1.51 years)had a similar performance to children with a typical development(TD)(N=37,5.19±0.40 years old),in a playful motor action(to spin on herself until she cannot get more).On average,ADs gave less laps,for less time,spending more time per rotation,but without significant difference.Of the AD,one-third fell and rose to continue to spin;one-third stopped and resumed spinning(with intervals of 2.05±0.86s).Three ADs performed the action counterclockwise and the other three in clockwise direction.The results support the hypothesis that AD can perform the activity of spinning,with DT(significantly)younger,allowing to AD momentary pauses and conditions for their physical security. | David Catela Ana Paula Seabra Bernardo Matias Miguel Nunes Pedro Neves Samuel Rodrigues | 2020 | Psychology Research2020，10，7： | 0 |
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