[Impact of surgeon's dominant hand-side consistency with surgical approach on operational efficiency of unilateral biportal endoscopic lumbar discectomy: a prospective cohort study]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiLi W, Gao M, Zhang L, Yu Q, Chen X.
europepmc +1 more source
, 2016 加卸载响应比是一种刻画震源区介质损伤程度的物理学参数,它通过随时间的变化来反映地震孕育的过程来进行地震预测。通过对1990-1999年新疆地区部分中强地震前加卸载响应比时空演化特征进行分析,并基于该理论得到孕震积分的概念应用于震例中。结果表明:中强震震前在震中附近可能存在多个高加卸载响应比值区,它们大致围成椭圆状或环状,地震通常发生在异常高值波动或减弱的过程中;异常峰值至发震时间比理论时间要短,这可能表明新疆地区构造活动剧烈 ...
张琳琳 +7 more
core
Gaoya dianqi换流变压器作为换流站内的核心设备，其水平斜向伸出箱体的阀侧套管受竖向地震作用影响显著。为提高换流变压器的抗震性能，提出由滑动摩擦摆水平隔震系统、弹簧—粘滞阻尼器竖向隔震系统、抗摇摆装置组成的三维隔震支座，并将其应用于±800 kV换流变压器，通过有限元数值模拟，计算并分析了设置隔震支座前后换流变压器的地震响应。结果表明：三维隔震支座显著降低了阀侧套管水平向和竖向加速度响应；相较于水平隔震，设置三维隔震系统的阀侧套管根部应力隔震效率提升了约12%；隔震体系位移响应主要集中在支座 ...
何堃宁, 邓扬阳, 谢靖, 谢强
doaj
, 2013 考察了南海深水区水体非均匀性对地震成像的影响. 将波动方程方法推广到非均匀运动水体, 计算了地震波场瞬时快照, 结果表明水体非均匀性影响了地震波的传播时间, 在零偏移距处该影响最大可达20 ms. 特别地, 中尺度涡会使目标地层成像发生畸变, 而水体内温度变化是造成这种畸变的根本原因.
郝天珧, 林缅, 姬莉莉
core
[Exploration and clinical application of the "digital and intelligent surgery" diagnosis and treatment workflow for oral and maxillofacial tumors]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanDU W +11 more
europepmc +1 more source
Large Scale LURR Anomaly before Wenchuan Earthquake
, 2009 孕震初期加卸载响应比(LURR)通常在1左右涨落,然后逐渐上升至峰值点。但强地震并不在峰值点上发生,而要滞后一段时间(T2)。T2与震级有关,震级越大,T2越长。对于8级地震,T2的计算值为28±8个月,汶川8级地震实际的T2是23个月。对于大地震,T2很长,峰值点后LURR通常迅速下降,在大地震前夕LURR常常降得很低,而预测的地震又迟迟没有发生,这种情况下很容易误导人们怀疑,甚至放弃原来的预测,殊不知,这时大地震正在迫近。这正是汶川8级地震给予人们血的教训。大地震不仅孕育时间长,孕震区面积也很大 ...
王海涛 +8 more
core
[Application and prospect of digital technology in endodontic microsurgery]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiZhang R, Meng L.
europepmc +1 more source
[Impact of outpatient services utilization of heart failure patients on hospitalization rate and its threshold effect: Taking patients with Urban Employee Basic Medical Insurance in Zhejiang Province as an example]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanZhang H, Jing R, Wang J, Fang H.
europepmc +1 more source
[Research progress of lymphaticovenous anastomosis in treatment of secondary lymphedema]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiLuo Z, Xiao S, Deng C.
europepmc +1 more source
[Endoscopic transcanal labyrinthectomy for intractable Meniere's disease: first experience]. [PDF]
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za ZhiWang T, Huang L, Deng Y, Song S, Lao Q.
europepmc +1 more source