The forward slip model with adhesion was used to derive the formula of calculating taper rolling time. The relation between the rolling time and the taper length and the relation between the rolling time and the taper...The forward slip model with adhesion was used to derive the formula of calculating taper rolling time. The relation between the rolling time and the taper length and the relation between the rolling time and the taper thickness can be obtained. The numerical solution for this formula was used on site. According to the simulation result, the roll gap value should be changed linearly with rolling time.展开更多
The Java earthquake occurred on July 17, 2006 with magnitude 7.8 associated to the subduction process of Indo-Australian plate and Sundaland block off southwestern coast of Java. We present postseismic deformation par...The Java earthquake occurred on July 17, 2006 with magnitude 7.8 associated to the subduction process of Indo-Australian plate and Sundaland block off southwestern coast of Java. We present postseismic deformation parameters of the 2006 Java earthquake analyzed using campaign GPS observation from 2006 to 2008 and continuous observation from 2007 to 2014. We use an analytical approach of logarithmic and exponential functions to model these GPS data. We find that the decay time in the order of hundreds of days after the mainshock as observed by 8 years＇ data after the mainshock for magnitude 7 earthquake is longer than a general megathrust earthquake event. Our findings suggest that the 2006 Java earthquake which is considered as ＂tsunami earthquake＂ most probably occurred in the region that has low rigidity and tends to continuously slip for long time periods.展开更多
Based on dynamic rupture simulations on a planar fault in a homogeneous half-space, we investigated the nucleation processes using the time-weakening friction law. Both the characteristic time and the rupture speed in...Based on dynamic rupture simulations on a planar fault in a homogeneous half-space, we investigated the nucleation processes using the time-weakening friction law. Both the characteristic time and the rupture speed in the nucleation asperity play an important role in determining rupture behaviors on a fault plane following the time-weakening friction law, with which rupture starts from a single point in the nucleation asperity and propagates at a given speed toward the boundary of the nucleation area. Rupture with a small characteristic time or a large rupture speed in the nucleation asperity propagates earlier from the hypocenter. Rupture following the slipweakening friction law requires a smaller radius of nucleation patch to have similar rupture front contours of the time-weakening friction law. Even if the rupture velocity in the nucleation patch of the time-weakening friction law increases to infinity, the peak slip rate in the nucleation asperity is smaller than that of the slip-weakening law. The peak ground velocity distributions of ruptures following the two friction laws are also compared.展开更多
目的探讨时间-空间标记反转脉冲（Time-SLIP）非对比增强成像技术对正常肾动脉主干和分支显示的可重复性。方法 36名健康志愿者（男16名、女20名,平均年龄21.9岁）均行2次1.5 T Time-SLIP非对比增强肾动脉检查,前后间隔时间约为1~2周。...目的探讨时间-空间标记反转脉冲（Time-SLIP）非对比增强成像技术对正常肾动脉主干和分支显示的可重复性。方法 36名健康志愿者（男16名、女20名,平均年龄21.9岁）均行2次1.5 T Time-SLIP非对比增强肾动脉检查,前后间隔时间约为1~2周。记录前后2次血管-肾脏信号比（VKR）、肾动脉分支级数、图像质量评分、肾动脉主干直径与面积等五个参数,使用Bland-Altman法、测量者组内相关系数（ICC）和测量者间ICC评价可重复性。结果 2名测察者肾动脉分级的ICC分别为0.820和0.908。肾动脉第一段（动脉主干）图像质量评分测量者ICC和测量者间ICC均为1,第二段（肾门区动脉）和第三段（肾实质内动脉）图像质量评分ICC介于0.768~1之间,测量者间ICC介于0.864~0.969之间。双侧肾动脉主干直径和面积的95%LOA介于2.8%~5.6%之间,最小ICC值为0.795,2名测察者间的最小ICC值为0.839。两次检查VKR的95%LOA分别为75%和72.2%,测量者ICC分别为0.510和0.577。结论 Time-SLIP非对比增强成像技术对正常肾动脉主干及其分支的显示具有很高可重复性,在肾动脉病变、肾移植前筛查、肾移植后疗效评估和随访等方面具有重要的意义。展开更多
基金Item Sponsored by National Economy Trade Committee Foundation (ZZ0113A040201)
文摘The forward slip model with adhesion was used to derive the formula of calculating taper rolling time. The relation between the rolling time and the taper length and the relation between the rolling time and the taper thickness can be obtained. The numerical solution for this formula was used on site. According to the simulation result, the roll gap value should be changed linearly with rolling time.
基金partially supported by the Australian Department of Foreign Affairs and Trade(DFAT)for Graduate Research on Earthquake and Active Tectonics at the Bandung Institute of Technology and Research Program of Bandung Institute of Technology No.FITB.PN-06-01-2016
文摘The Java earthquake occurred on July 17, 2006 with magnitude 7.8 associated to the subduction process of Indo-Australian plate and Sundaland block off southwestern coast of Java. We present postseismic deformation parameters of the 2006 Java earthquake analyzed using campaign GPS observation from 2006 to 2008 and continuous observation from 2007 to 2014. We use an analytical approach of logarithmic and exponential functions to model these GPS data. We find that the decay time in the order of hundreds of days after the mainshock as observed by 8 years＇ data after the mainshock for magnitude 7 earthquake is longer than a general megathrust earthquake event. Our findings suggest that the 2006 Java earthquake which is considered as ＂tsunami earthquake＂ most probably occurred in the region that has low rigidity and tends to continuously slip for long time periods.
基金supported by the National Natural Science Foundation of China (Nos. 41504039, 41474037 and 41274053)
文摘Based on dynamic rupture simulations on a planar fault in a homogeneous half-space, we investigated the nucleation processes using the time-weakening friction law. Both the characteristic time and the rupture speed in the nucleation asperity play an important role in determining rupture behaviors on a fault plane following the time-weakening friction law, with which rupture starts from a single point in the nucleation asperity and propagates at a given speed toward the boundary of the nucleation area. Rupture with a small characteristic time or a large rupture speed in the nucleation asperity propagates earlier from the hypocenter. Rupture following the slipweakening friction law requires a smaller radius of nucleation patch to have similar rupture front contours of the time-weakening friction law. Even if the rupture velocity in the nucleation patch of the time-weakening friction law increases to infinity, the peak slip rate in the nucleation asperity is smaller than that of the slip-weakening law. The peak ground velocity distributions of ruptures following the two friction laws are also compared.
