Based on a comparative study of the Guliya ice core with the Greenland GRIP ice core, the abrupt climatic changes on the Tibetan Plateau during the Last Ice Age have been examined. The major stadial-interstadial event...Based on a comparative study of the Guliya ice core with the Greenland GRIP ice core, the abrupt climatic changes on the Tibetan Plateau during the Last Ice Age have been examined. The major stadial-interstadial events and 7 warm events (Brφrump, Odderade, Oerel, Glinde, Hengelo, Denekamp, BQlling) are consistent in the two ice cores. However, there are some unique features in the Guliya ice core records. The transition from warm to cold periods in the Guliya ice core is faster than that in the Greenland GRIP ice core. The magnitude of the climatic changes in the Guliya ice core is also larger than that in the Greenland GRIP ice core. Another significant feature of the Guliya ice core records is that there is a series of cycles of about 200 a from 18 to 35 kaBP. 22 warm events and 20 cold events with a fluctuation magnitude of 71 have been distinguished. The warm and cold events with a fluctuation magnitude within 3 ℃ are as high as 100. It is speculated that the abrupt climatic changes in different periods are caused by different driving forces. The abrupt climatic changes from stadial to interstadial are driven by insolation and are amplified by the snow cover on the Tibetan Plateau. The abrupt climatic changes on shorter time scales are the consequence of interaction between sun activity and the monsoon.展开更多
目的探讨湿热敷联合使用握力器降低经外周静脉穿刺中心静脉置管(peripherally inserted central catheter,PICC)致机械性静脉炎发生的效果。方法方便抽样法选择2012年7月至2013年6月,上海市第六人民医院收治的行PICC置管的200例肿瘤化...目的探讨湿热敷联合使用握力器降低经外周静脉穿刺中心静脉置管(peripherally inserted central catheter,PICC)致机械性静脉炎发生的效果。方法方便抽样法选择2012年7月至2013年6月,上海市第六人民医院收治的行PICC置管的200例肿瘤化疗患者为研究对象,将2012年7-12月收治的100例患者作为对照组,2013年1-6月收治的100例患者作为观察组,对照组患者置管后常规进行湿热敷,观察组患者在对照组的基础上联合使用电子握力器,观察并比较两组患者机械性静脉炎的发生率。结果观察组患者机械性静脉炎的发生率低于对照组,分级情况优于对照组,差异均有统计学意义(均P<0.01)。结论湿热敷联合使用握力器能有效降低PICC置管致机械性静脉炎的发生率。展开更多
The present winter climate of continental China is associated with cold air activity.The cold air forming Siberian high pressure comes from the Northern Barents Sea.Northwestern Kara Sea and Northern Atlantic Ocean (f...The present winter climate of continental China is associated with cold air activity.The cold air forming Siberian high pressure comes from the Northern Barents Sea.Northwestern Kara Sea and Northern Atlantic Ocean (fig.1). in other words, mainly fromthe cold northern sea surface. west and east to Novaya Zemlya and the sea surface south展开更多
The effect of botulinum toxin type A injection on voluntary grip control was examined in a 53-year-old female, who sustained a hemorrhagic right middle cerebral artery stroke 3 years previously, which resulted in fing...The effect of botulinum toxin type A injection on voluntary grip control was examined in a 53-year-old female, who sustained a hemorrhagic right middle cerebral artery stroke 3 years previously, which resulted in finger flexor spasticity and residual weak finger/wrist extension. The patient received 50 units of botulinum toxin type A injection each to the motor points （2 sites/muscle） of the left flexor digitorum superficialis and flexor digitorum profundus, respectively. Botulinum toxin injection led to weakness and tone reduction in the spastic finger flexors, but improved grip release time in grip initiation/release reaction time tasks. Improved release time was accompanied by shortened extensor electromyography activity, and improved release time likely correlated with blocked co-contraction of finger flexors during voluntary finger extension. This case report demonstrated that botulinum toxin injection improved voluntary motor control of the hand in a chronic stroke patient with residual finger extension.展开更多
为了快速、准确地建立4种不同滚子类型的弧面凸轮三维模型,采用UG Open Grip二次开发工具,根据不同弧面凸轮廓面方程生成一系列离散点,再由点生成线,由线生成面,由面生成体,逐步完成不同滚子类型弧面凸轮的三维建模。该方法为快速、准...为了快速、准确地建立4种不同滚子类型的弧面凸轮三维模型,采用UG Open Grip二次开发工具,根据不同弧面凸轮廓面方程生成一系列离散点,再由点生成线,由线生成面,由面生成体,逐步完成不同滚子类型弧面凸轮的三维建模。该方法为快速、准确地建立弧面凸轮三维模型提供了一种方法。展开更多
基金Project supported by the CAS Key Projects National Climbing Program (Grant Nos. KZ951-A1-204-02-03, KZ951-A1-402-03, 95-Yu-24).
文摘Based on a comparative study of the Guliya ice core with the Greenland GRIP ice core, the abrupt climatic changes on the Tibetan Plateau during the Last Ice Age have been examined. The major stadial-interstadial events and 7 warm events (Brφrump, Odderade, Oerel, Glinde, Hengelo, Denekamp, BQlling) are consistent in the two ice cores. However, there are some unique features in the Guliya ice core records. The transition from warm to cold periods in the Guliya ice core is faster than that in the Greenland GRIP ice core. The magnitude of the climatic changes in the Guliya ice core is also larger than that in the Greenland GRIP ice core. Another significant feature of the Guliya ice core records is that there is a series of cycles of about 200 a from 18 to 35 kaBP. 22 warm events and 20 cold events with a fluctuation magnitude of 71 have been distinguished. The warm and cold events with a fluctuation magnitude within 3 ℃ are as high as 100. It is speculated that the abrupt climatic changes in different periods are caused by different driving forces. The abrupt climatic changes from stadial to interstadial are driven by insolation and are amplified by the snow cover on the Tibetan Plateau. The abrupt climatic changes on shorter time scales are the consequence of interaction between sun activity and the monsoon.
文摘目的探讨湿热敷联合使用握力器降低经外周静脉穿刺中心静脉置管(peripherally inserted central catheter,PICC)致机械性静脉炎发生的效果。方法方便抽样法选择2012年7月至2013年6月,上海市第六人民医院收治的行PICC置管的200例肿瘤化疗患者为研究对象,将2012年7-12月收治的100例患者作为对照组,2013年1-6月收治的100例患者作为观察组,对照组患者置管后常规进行湿热敷,观察组患者在对照组的基础上联合使用电子握力器,观察并比较两组患者机械性静脉炎的发生率。结果观察组患者机械性静脉炎的发生率低于对照组,分级情况优于对照组,差异均有统计学意义(均P<0.01)。结论湿热敷联合使用握力器能有效降低PICC置管致机械性静脉炎的发生率。
基金Project supported by the National Natural Science Foundation of China.
文摘The present winter climate of continental China is associated with cold air activity.The cold air forming Siberian high pressure comes from the Northern Barents Sea.Northwestern Kara Sea and Northern Atlantic Ocean (fig.1). in other words, mainly fromthe cold northern sea surface. west and east to Novaya Zemlya and the sea surface south
基金supported in part by NIH grants(NIH/NINDS R01NS060774NIH/NICHD/NCMRR R24 HD050821-08)under subcontract with the Rehabilitation Insti-tute of Chicago
文摘The effect of botulinum toxin type A injection on voluntary grip control was examined in a 53-year-old female, who sustained a hemorrhagic right middle cerebral artery stroke 3 years previously, which resulted in finger flexor spasticity and residual weak finger/wrist extension. The patient received 50 units of botulinum toxin type A injection each to the motor points （2 sites/muscle） of the left flexor digitorum superficialis and flexor digitorum profundus, respectively. Botulinum toxin injection led to weakness and tone reduction in the spastic finger flexors, but improved grip release time in grip initiation/release reaction time tasks. Improved release time was accompanied by shortened extensor electromyography activity, and improved release time likely correlated with blocked co-contraction of finger flexors during voluntary finger extension. This case report demonstrated that botulinum toxin injection improved voluntary motor control of the hand in a chronic stroke patient with residual finger extension.
