Lithium metal is one of the most promising anode materials for rechargeable battery with high energy density,but its practical use is still hindered by two main problems,namely,lithium dendrite growth and low Coulombi...Lithium metal is one of the most promising anode materials for rechargeable battery with high energy density,but its practical use is still hindered by two main problems,namely,lithium dendrite growth and low Coulombic efficiency.To address the issues,cesium nitrate(CsNO3)is selected as the additive to modify the electrolyte for lithium secondary battery.Here we report electrochemical performance of lithium secondary battery with different concentration of CsNO3 as electrolyte additive.The study result demonstrates that Coulombic efficiency of Li–Cu cells and the lifetime of symmetric lithium cells contained CsNO3 additive are improved greatly.Li–Cu cell with 0.05 mol/L CsNO3 and 0.15 mol/L LiNO3 as electrolyte additive presents the best electrochemical performance,having the highest Coulombic efficiency of around 97%and the lowest interfacial resistance.With increasing the concentration of CsNO3 as electrolyte additive,the electrochemical performance of cells becomes poor.Meanwhile,the morphology of lithium deposited films with CsNO3-modified electrolyte become smoother and more uniform compared with the basic electrolyte.展开更多
Songji Ancient Town in Yongchuan District,Chongqing,is a famous historical and cultural town in China and a national AAAA-level tourist attraction.In recent years,combining its unique historical and cultural heritage,...Songji Ancient Town in Yongchuan District,Chongqing,is a famous historical and cultural town in China and a national AAAA-level tourist attraction.In recent years,combining its unique historical and cultural heritage,the scenic area has developed research travel products themed on intangible cultural heritage and red tourism,attracting students from across the country to experience it.On the other hand,in the context of the deepening of the“double reduction”policy and the concept of a“high-quality education system,”the educational connotation of Songji Ancient Town’s research products is constantly enriching.Based on this,this article will combine the RMP theory to explore strategies for improving satisfaction with Yongchuan District’s“Songji Ancient Town Research Products”under a high-quality education system,to promote the development of the scenic area’s research experience projects and overall tourism service levels.展开更多
目的评价适龄儿童一款水痘减毒活疫苗(Varicella attenuated live vaccine,VarV)接种不良反应发生率。方法在安徽省5个地市预防接种门诊招募1-12岁健康儿童,观察接种1剂次VarV后0-30 d不良反应,分析不良反应发生率。结果本研究共纳入916...目的评价适龄儿童一款水痘减毒活疫苗(Varicella attenuated live vaccine,VarV)接种不良反应发生率。方法在安徽省5个地市预防接种门诊招募1-12岁健康儿童,观察接种1剂次VarV后0-30 d不良反应,分析不良反应发生率。结果本研究共纳入9169例受试者,接种VarV后不良反应总发生率为1.09%(100例),其中局部反应、全身反应发生率分别为0.69%(63例)、0.46%(42例),各以接种部位疼痛(0.40%)和发热(0.26%)发生率最高,未发生3级/4级或严重不良反应和特殊关注不良事件。1-3岁、4-12岁受试者不良反应发生率分别为1.47%(64/4347)、0.75%(36/4822)(χ^(2)=11.16,P<0.001)。结论1-12岁健康儿童接种1剂次VarV后不良反应轻微,发生率在预期范围内。展开更多
触屏购买广告(Interfaces Direct-Touch Ad vertising)是指以触摸终端屏幕实现购买决策的网络广告。在营销现实中,触屏购买广告总量大、增速快、效果好,然而理论上对触屏购买广告的研究却不能很好地解决业界问题。基于此,本文首先梳理...触屏购买广告(Interfaces Direct-Touch Ad vertising)是指以触摸终端屏幕实现购买决策的网络广告。在营销现实中,触屏购买广告总量大、增速快、效果好,然而理论上对触屏购买广告的研究却不能很好地解决业界问题。基于此,本文首先梳理了触屏购买广告的理论基础——触摸对购买意愿与行为影响的相关研究。其次,本文对触屏购买广告的发展脉络进行了回顾。最后,本文梳理了影响触屏购买广告效果的相关研究,并重点探讨触屏购买广告的重要因素——购买键对触屏购买广告效果的影响,提出了未来在理论和实践层面可能有所贡献的触屏购买广告研究方向。展开更多
基金Project(2016YFB0300801)supported by the National Key Research and Development Program of ChinaProject(2012CB619502)supported by the National Basic Research Program of China
文摘Lithium metal is one of the most promising anode materials for rechargeable battery with high energy density,but its practical use is still hindered by two main problems,namely,lithium dendrite growth and low Coulombic efficiency.To address the issues,cesium nitrate(CsNO3)is selected as the additive to modify the electrolyte for lithium secondary battery.Here we report electrochemical performance of lithium secondary battery with different concentration of CsNO3 as electrolyte additive.The study result demonstrates that Coulombic efficiency of Li–Cu cells and the lifetime of symmetric lithium cells contained CsNO3 additive are improved greatly.Li–Cu cell with 0.05 mol/L CsNO3 and 0.15 mol/L LiNO3 as electrolyte additive presents the best electrochemical performance,having the highest Coulombic efficiency of around 97%and the lowest interfacial resistance.With increasing the concentration of CsNO3 as electrolyte additive,the electrochemical performance of cells becomes poor.Meanwhile,the morphology of lithium deposited films with CsNO3-modified electrolyte become smoother and more uniform compared with the basic electrolyte.
文摘Songji Ancient Town in Yongchuan District,Chongqing,is a famous historical and cultural town in China and a national AAAA-level tourist attraction.In recent years,combining its unique historical and cultural heritage,the scenic area has developed research travel products themed on intangible cultural heritage and red tourism,attracting students from across the country to experience it.On the other hand,in the context of the deepening of the“double reduction”policy and the concept of a“high-quality education system,”the educational connotation of Songji Ancient Town’s research products is constantly enriching.Based on this,this article will combine the RMP theory to explore strategies for improving satisfaction with Yongchuan District’s“Songji Ancient Town Research Products”under a high-quality education system,to promote the development of the scenic area’s research experience projects and overall tourism service levels.
文摘目的评价适龄儿童一款水痘减毒活疫苗(Varicella attenuated live vaccine,VarV)接种不良反应发生率。方法在安徽省5个地市预防接种门诊招募1-12岁健康儿童,观察接种1剂次VarV后0-30 d不良反应,分析不良反应发生率。结果本研究共纳入9169例受试者,接种VarV后不良反应总发生率为1.09%(100例),其中局部反应、全身反应发生率分别为0.69%(63例)、0.46%(42例),各以接种部位疼痛(0.40%)和发热(0.26%)发生率最高,未发生3级/4级或严重不良反应和特殊关注不良事件。1-3岁、4-12岁受试者不良反应发生率分别为1.47%(64/4347)、0.75%(36/4822)(χ^(2)=11.16,P<0.001)。结论1-12岁健康儿童接种1剂次VarV后不良反应轻微,发生率在预期范围内。
文摘触屏购买广告(Interfaces Direct-Touch Ad vertising)是指以触摸终端屏幕实现购买决策的网络广告。在营销现实中,触屏购买广告总量大、增速快、效果好,然而理论上对触屏购买广告的研究却不能很好地解决业界问题。基于此,本文首先梳理了触屏购买广告的理论基础——触摸对购买意愿与行为影响的相关研究。其次,本文对触屏购买广告的发展脉络进行了回顾。最后,本文梳理了影响触屏购买广告效果的相关研究,并重点探讨触屏购买广告的重要因素——购买键对触屏购买广告效果的影响,提出了未来在理论和实践层面可能有所贡献的触屏购买广告研究方向。
