China Society for Human Rights Studies, I would like to extend my warm greetings to the launch of your Human Rights magazine. Enjoying human rights fully is a lofty goal long pursued after by human race. Over the year...China Society for Human Rights Studies, I would like to extend my warm greetings to the launch of your Human Rights magazine. Enjoying human rights fully is a lofty goal long pursued after by human race. Over the years when they carried out revolution, construction and reforms, the Chinese people have struggled indomitably and strived incessantly to achieve this goal. Progress made in this regard has caught worldwide attention. When struggling for, safeguarding, promoting and developing human rights, the Chinese people have always combined the universality prin-展开更多
The Duanfengshan deposit is a newly discovered large pegmatitic-type Nb-Ta deposit in the central section of the Jiangnan orogenic belt,South China.There are three types of pegmatite in the Duanfengshan area:microclin...The Duanfengshan deposit is a newly discovered large pegmatitic-type Nb-Ta deposit in the central section of the Jiangnan orogenic belt,South China.There are three types of pegmatite in the Duanfengshan area:microcline pegmatite,microcline-albite pegmatite and albite pegmatite.Although several geological,geochronological and geochemical studies of this deposit have been carried out,the relationships between the evolution degree of different types of pegmatites and mineralization are still unclear.We address this problem through systematic petrographic and geochemical studies of muscovite and feldspars from two representative pegmatite veins,the No.328 microcline-albite pegmatite vein,and the No.610 albite pegmatite vein.The results of electron probe microanalysis(EPMA)and laser ablation inductively coupled plasma mass spectrometry(LA-ICP-MS)analyses of muscovite and K-feldspar reveal that K/Rb ratios decrease with increasing Rb,Cs,Ga,Nb and Ta contents alongside decreasing Ba and Sr contents,suggesting that magmatic differentiation played a dominant role in rare metal mineralization.A comparison of the analytical results of this study with those from rare metal pegmatites globally suggests that the No.610 vein has a high mineralization potential,whereas the No.328 vein has relatively low mineralization potential.The results from this study may be applied to the evaluation of mineralization potential for other pegmatite veins in the Duanfengshan area and other rare metal pegmatite fields with similar geological settings.展开更多
This work aims to reveal the mechanical responses and energy evolution characteristics of skarn rock under constant amplitude-varied frequency loading paths.Testing results show that the fatigue lifetime,stress−strain...This work aims to reveal the mechanical responses and energy evolution characteristics of skarn rock under constant amplitude-varied frequency loading paths.Testing results show that the fatigue lifetime,stress−strain responses,deformation,energy dissipation and fracture morphology are all impacted by the loading rate.A pronounced influence of the loading rate on rock deformation is found,with slower loading rate eliciting enhanced strain development,alongside augmented energy absorption and dissipation.In addition,it is revealed that the loading rate and cyclic loading amplitude jointly influence the phase shift distribution,with accelerated rates leading to a narrower phase shift duration.It is suggested that lower loading rate leads to more significant energy dissipation.Finally,the tensile or shear failure modes were intrinsically linked to loading strategy,with cyclic loading predominantly instigating shear damage,as manifest in the increased presence of pulverized grain particles.This work would give new insights into the fortification of mining structures and the optimization of mining methodologies.展开更多
为建立一种检测猪圆环病毒3型(porcine circovirus type 3,PCV3)的PCR-ELSIA方法,根据GenBank上报道的PCV3全基因组序列,针对其高度保守区域设计1对特异性引物,上、下游引物的5′端分别标记生物素和地高辛。经PCR扩增获得大量带有标记...为建立一种检测猪圆环病毒3型(porcine circovirus type 3,PCV3)的PCR-ELSIA方法,根据GenBank上报道的PCV3全基因组序列,针对其高度保守区域设计1对特异性引物,上、下游引物的5′端分别标记生物素和地高辛。经PCR扩增获得大量带有标记的目的基因,依靠生物素-链霉亲和素的非共价结合作用固定目的基因于载体上,再通过羊抗DIG-HRP的显色反应,建立PCR-ELISA检测方法。结果表明,该方法与猪繁殖与呼吸综合征病毒、猪瘟病毒、猪细小病毒和猪圆环病毒2型无交叉反应,特异性良好。PCR-ELISA方法最低检测限为5.58×10^(2)copies/μL,敏感性比常规PCR高100倍(常规PCR的检测限为5.58×10^(4)copies/μL)。PCR-ELISA方法批内和批间重复性检测的变异系数分别为1.90%~5.20%和3.89%~9.03%。对132份临床样品进行PCV3检测,PCR-ELSIA检出率为9.10%(12/132),高于常规PCR的检出率(4.55%,6/132)。综上,该方法具有特异、灵敏、安全高效的优点,可为PCV3的诊断、防控和流行病学调查提供新的技术手段。展开更多
详细介绍了Philips Allura Xper FD20平板血管造影系统使用过程中出现的机架控制模块无法实现机架的运动、机器开机后无法进入应用界面和系统曝光透视时屏幕无图像显示、曝光透视过程中无射线等故障维修过程,为相关维修人员维修类似设...详细介绍了Philips Allura Xper FD20平板血管造影系统使用过程中出现的机架控制模块无法实现机架的运动、机器开机后无法进入应用界面和系统曝光透视时屏幕无图像显示、曝光透视过程中无射线等故障维修过程,为相关维修人员维修类似设备故障提供参考。指出了只有做好日常维护保养工作,才能降低设备的故障发生率,保证其正常运行。展开更多
文摘China Society for Human Rights Studies, I would like to extend my warm greetings to the launch of your Human Rights magazine. Enjoying human rights fully is a lofty goal long pursued after by human race. Over the years when they carried out revolution, construction and reforms, the Chinese people have struggled indomitably and strived incessantly to achieve this goal. Progress made in this regard has caught worldwide attention. When struggling for, safeguarding, promoting and developing human rights, the Chinese people have always combined the universality prin-
基金financially supported by the National Natural Science Foundation of China(Grant Nos.42102110,U2444204,42472111 and U2344220).
文摘The Duanfengshan deposit is a newly discovered large pegmatitic-type Nb-Ta deposit in the central section of the Jiangnan orogenic belt,South China.There are three types of pegmatite in the Duanfengshan area:microcline pegmatite,microcline-albite pegmatite and albite pegmatite.Although several geological,geochronological and geochemical studies of this deposit have been carried out,the relationships between the evolution degree of different types of pegmatites and mineralization are still unclear.We address this problem through systematic petrographic and geochemical studies of muscovite and feldspars from two representative pegmatite veins,the No.328 microcline-albite pegmatite vein,and the No.610 albite pegmatite vein.The results of electron probe microanalysis(EPMA)and laser ablation inductively coupled plasma mass spectrometry(LA-ICP-MS)analyses of muscovite and K-feldspar reveal that K/Rb ratios decrease with increasing Rb,Cs,Ga,Nb and Ta contents alongside decreasing Ba and Sr contents,suggesting that magmatic differentiation played a dominant role in rare metal mineralization.A comparison of the analytical results of this study with those from rare metal pegmatites globally suggests that the No.610 vein has a high mineralization potential,whereas the No.328 vein has relatively low mineralization potential.The results from this study may be applied to the evaluation of mineralization potential for other pegmatite veins in the Duanfengshan area and other rare metal pegmatite fields with similar geological settings.
基金Project(52174069) supported by the National Natural Science Foundation of ChinaProject(8202033) supported by the Beijing Natural Science Foundation,ChinaProject(KCF2203) supported by the Henan Key Laboratory for Green and Efficient Mining&Comprehensive Utilization of Mineral Resources (Henan Polytechnic University),China。
文摘This work aims to reveal the mechanical responses and energy evolution characteristics of skarn rock under constant amplitude-varied frequency loading paths.Testing results show that the fatigue lifetime,stress−strain responses,deformation,energy dissipation and fracture morphology are all impacted by the loading rate.A pronounced influence of the loading rate on rock deformation is found,with slower loading rate eliciting enhanced strain development,alongside augmented energy absorption and dissipation.In addition,it is revealed that the loading rate and cyclic loading amplitude jointly influence the phase shift distribution,with accelerated rates leading to a narrower phase shift duration.It is suggested that lower loading rate leads to more significant energy dissipation.Finally,the tensile or shear failure modes were intrinsically linked to loading strategy,with cyclic loading predominantly instigating shear damage,as manifest in the increased presence of pulverized grain particles.This work would give new insights into the fortification of mining structures and the optimization of mining methodologies.
文摘为建立一种检测猪圆环病毒3型(porcine circovirus type 3,PCV3)的PCR-ELSIA方法,根据GenBank上报道的PCV3全基因组序列,针对其高度保守区域设计1对特异性引物,上、下游引物的5′端分别标记生物素和地高辛。经PCR扩增获得大量带有标记的目的基因,依靠生物素-链霉亲和素的非共价结合作用固定目的基因于载体上,再通过羊抗DIG-HRP的显色反应,建立PCR-ELISA检测方法。结果表明,该方法与猪繁殖与呼吸综合征病毒、猪瘟病毒、猪细小病毒和猪圆环病毒2型无交叉反应,特异性良好。PCR-ELISA方法最低检测限为5.58×10^(2)copies/μL,敏感性比常规PCR高100倍(常规PCR的检测限为5.58×10^(4)copies/μL)。PCR-ELISA方法批内和批间重复性检测的变异系数分别为1.90%~5.20%和3.89%~9.03%。对132份临床样品进行PCV3检测,PCR-ELSIA检出率为9.10%(12/132),高于常规PCR的检出率(4.55%,6/132)。综上,该方法具有特异、灵敏、安全高效的优点,可为PCV3的诊断、防控和流行病学调查提供新的技术手段。
文摘详细介绍了Philips Allura Xper FD20平板血管造影系统使用过程中出现的机架控制模块无法实现机架的运动、机器开机后无法进入应用界面和系统曝光透视时屏幕无图像显示、曝光透视过程中无射线等故障维修过程,为相关维修人员维修类似设备故障提供参考。指出了只有做好日常维护保养工作,才能降低设备的故障发生率,保证其正常运行。
文摘目的本研究基于开滦队列,探讨长期随访期间残余胆固醇(remnant cholesterol,RC)的变异性与心脏传导阻滞(cardiac conduction block,CCB)的关联。方法采用回顾性队列研究,以连续参加2006、2008、2010年度体检的开滦研究人群作为研究队列,根据纳入和排除标准,最终入选39299例观察对象,计算随访期间RC的变异性,RC的变异性通过标准差(standard deviation,SD)、平均真实变异性(average real variability,ARV)、变异系数(coefficient of variation,CV)、独立于均值的变异(variation independent of mean,VIM)测量。以RC的变异性四分位进行分组,将观察对象分成4组,每2年进行1次随访,以发生CCB、死亡或随访结束(2019年12月31日)为随访终点,采用Kaplan-Meier法计算不同分组发生终点事件的累积发病率,并用Log-Rank检验比较各组终点事件累积发生率的差异。用Cox比例风险模型及限制性立方样条曲线(restricted cubic spline,RCS)分析RC的变异性与CCB及其亚型的关联。结果39299例观察对象在平均随访7.43年后,发生CCB者共916人。以CCB为结局事件,校正混杂因素后,以RC-SD四分位分组,与RC-SD最低发病密度组(Q2)相比,Q1组发生CCB的HR值为1.344(95%CI:1.110~1.626,P=0.002),Q3、Q4组发生CCB的HR值分别1.068(95%CI:0.878~1.299,P=0.509)、1.311(95%CI:1.089~1.579,P=0.004)。以RC-ARV、RC-CV、RC-VIM四分位分组均得出类似的结论。RCS曲线表明,RC-SD与CCB之间呈U型关联(P_(overall)<0.05,P_(nonlinearity)<0.05)。敏感性分析、分层分析进一步验证了此结论。结论RC的变异性与CCB呈U型关联,该研究为预防CCB的发生提供了新的方向。对策我国血脂管理策略应从追求“低水平稳定”,向兼顾“指标长期平稳性”转型升级。即将“维持血脂在适宜区间的生理性波动”这一新理念,系统整合至国家心脑血管疾病防治规划、基层公共卫生服务项目及全民健康教育体系,以此推动慢性病管理迈向更加精准、科学的新阶段。
