期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
The effect of the guide field on energy conversion during collisionless magnetic reconnection
1
作者 Hui Xiao zhihong zhong +4 位作者 Meng Zhou YongYuan Yi LiangJin Song Ye Pang XiaoHua Deng 《Earth and Planetary Physics》 CAS CSCD 2023年第4期436-444,共9页
Magnetic reconnection is well known as an efficient mechanism for transferring magnetic energy into plasma energy.However,how the energy conversion and partition between different species is influenced by the shear an... Magnetic reconnection is well known as an efficient mechanism for transferring magnetic energy into plasma energy.However,how the energy conversion and partition between different species is influenced by the shear angle of the reconnecting magnetic component(i.e.,the guide field strength)is not well understood.Using 2.5-dimensional particle-in-cell simulations,we investigated the energy conversion in reconnection with different guide fields.We found that the overall energy conversion first decreases steeply and then increases slowly when the guide field increases fromB_(g)=0 toB_(g)=4.The increase in energy conversion in the large guide field regime is due to the electron energy gain through the perpendicular channelJ_(⊥)·E_(⊥).The overall energy conversion is predominantly contributed byJ_(⊥)·E_(⊥) rather thanJ||E||.We further find that energy conversion mainly occurs within the reconnection front and the flux pileup region.However,the contribution from the fore reconnection front becomes important in large guide field regimes(3<B_(g)≤4)because of the enhanced electron energy gain. 展开更多
关键词 collisionless magnetic reconnection energy conversion guide field particle-in-cell simulation
下载PDF
规培教学中椎弓根置钉的学习曲线研究
2
作者 周葳 钟志宏 +1 位作者 余灏涛 张平 《国际感染病学(电子版)》 CAS 2018年第4期168-170,共3页
目的研究骨科专科规培医师腰椎椎弓根置钉技术的学习曲线,为临床技能教学提供学习强度依据。方法2016年7月-2018年10月在脊柱外科参加骨科专陪的医生共9名,脊柱外科专科培训时间最少个12月。所有专陪医师实际操作前先接受腰椎椎弓根置... 目的研究骨科专科规培医师腰椎椎弓根置钉技术的学习曲线,为临床技能教学提供学习强度依据。方法2016年7月-2018年10月在脊柱外科参加骨科专陪的医生共9名,脊柱外科专科培训时间最少个12月。所有专陪医师实际操作前先接受腰椎椎弓根置钉理论培训,担任10台手术二助后开始进行实际置钉操作,绘制每位医生完成60次椎弓根置钉的操作时间、透视次数曲线。结果学员完成的置钉数量为63-74次,单个置钉时间及透视次数的学习曲线显示经过约30例操作后到达平台期,手术时间稳定在6min、透视次数稳定在3次左右。将总的操作过程分次研究后发现后30次的平均置钉时间及透视次数无统计学差异(P>0.05)。结论脊柱外科专科培训医师学习腰椎椎弓根置钉的例数为30例左右达到技术平台。该结果对于制定脊柱外科专科培训的学习强度,提高培训效果有着积极的指导意义。 展开更多
关键词 学习曲线 椎弓根置钉 骨科专陪
下载PDF
Influence of Zn Content on Microstructures,Mechanical Properties and Stress Corrosion Behavior of AA5083 Aluminum Alloy 被引量:2
3
作者 Zhixiong Zhu Xingxu Jiang +5 位作者 Gang Wei Xiaogang Fang zhihong zhong Kuijing Song Jian Han Zhengyi Jiang 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2020年第10期1369-1378,共10页
To enhance the stress corrosion cracking(SCC)resistance,Zn was utilized as an alloy element to add in the AA5083 aluminum alloys.The effects of Zn content on the microstructures,mechanical properties and SCC resistanc... To enhance the stress corrosion cracking(SCC)resistance,Zn was utilized as an alloy element to add in the AA5083 aluminum alloys.The effects of Zn content on the microstructures,mechanical properties and SCC resistance were systematically evaluated.The results demonstrate that in the studied range adding Zn can significantly improve the SCC resistance of the AA5083 alloys.This is related to the relatively low amount of continuous β(Al3Mg2)phase along grain boundary and the formation of Zn-containing phase such as Al5Mg11Zn4 phase.Based on the results,the optimal Zn content with respect to SCC resistance is approximately 0.50 wt.%.Further increasing Zn content results in coarse precipitates discontinuously distributed along grain boundaries. 展开更多
关键词 AA5083 aluminum alloy Slow strain rate test PRECIPITATION Stress corrosion cracking
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部