目的探讨与分析急性生理学及慢性健康状况评分系统（acute physiology and chronic health evaluationⅡ , APACHE Ⅱ ）序贯器官衰竭估计评分（sequential organ failure assessment，SOFA）、小儿死亡风险评分（pediatricriskofmortal...目的探讨与分析急性生理学及慢性健康状况评分系统（acute physiology and chronic health evaluationⅡ , APACHE Ⅱ ）序贯器官衰竭估计评分（sequential organ failure assessment，SOFA）、小儿死亡风险评分（pediatricriskofmortalityscore，PRISM）、小儿危重病例评分（pediatric critical illness score，PCIS）、小儿死亡指数（paediatric index of mortality，PIM）5种常用的评分系统在儿科重症病例中判断病情轻重、评估预后的效果；同时筛选出适用于我院PICU的危重症评分。方法选取2013年1月至2014年12月我院PICU全部院内死亡病例42例为死亡组，选取存活（或治愈）患儿444例为存活组，分别予评估入院时APACHEⅡ、SOFA、PRISM、PCIS、PIM5项评分；分析死亡组与存活组各项评分的差异。结果死亡组与存活组入院时APACHEⅡ、SOFA、PCIS、PRISM、PIM这5种重症评分的差异均有统计学意义（13．43±8．70VS．3．48±3．94；78．38±9．33 vs．88．24±6．84；0．1420±0．2147 vs．0．0153±0．0307；5．48±3．42 vs．1．73±1．94；22．02±8．48 vs．12．68±4．88，P均〈0．001）。APACHEⅡ、SOFA、PCIS、PRISM、PIM这5种重症评分的工作特征曲线下面积（95％CI）分别为0．854（0．798，0．910）、0．838（0．778，0．898）、0．881（0．828，0．934）、0．808（0．748，0．869）、0．936（0．913，0．960），PIM的曲线下面积显著高于其他评分。结论5种评分用于评估疾病轻重程度均有效，对评判预后、评估病情严重程度有很好的鉴别能力，尤以PIM更加显著。展开更多
SrBi 4 Ti 4O 15 ceramics samples with different Bi content of which mole radio, n (Sr): n (Bi): n (Ti):,is 1:4(1+x):4(x=-0.05,0,0.05,0.10,0.15,0.20),are prepared by solid-state reaction method.Their structure is analy...SrBi 4 Ti 4O 15 ceramics samples with different Bi content of which mole radio, n (Sr): n (Bi): n (Ti):,is 1:4(1+x):4(x=-0.05,0,0.05,0.10,0.15,0.20),are prepared by solid-state reaction method.Their structure is analyzed by X-ray diffraction,and their dielectricity and ferroelectricity are measured.Results show that pure SrBi 4 Ti 4O 15 pahase exists in the samples whith x=0.05 and 0.10.The sintered ceramics with x=0.05 have good ferroelectric and dielectric properties:The remnant polarization (2 P r) and coercive field ( E c) are 2.86×10 -9 C·m -2 and 8.65×10 6V·m -1 .The dielectric constant (ε r) changes litter in the range from 1 kHz to 4MHz,and ε r is 425 at the frequency of 1 MHz.展开更多
文摘目的探讨与分析急性生理学及慢性健康状况评分系统（acute physiology and chronic health evaluationⅡ , APACHE Ⅱ ）序贯器官衰竭估计评分（sequential organ failure assessment，SOFA）、小儿死亡风险评分（pediatricriskofmortalityscore，PRISM）、小儿危重病例评分（pediatric critical illness score，PCIS）、小儿死亡指数（paediatric index of mortality，PIM）5种常用的评分系统在儿科重症病例中判断病情轻重、评估预后的效果；同时筛选出适用于我院PICU的危重症评分。方法选取2013年1月至2014年12月我院PICU全部院内死亡病例42例为死亡组，选取存活（或治愈）患儿444例为存活组，分别予评估入院时APACHEⅡ、SOFA、PRISM、PCIS、PIM5项评分；分析死亡组与存活组各项评分的差异。结果死亡组与存活组入院时APACHEⅡ、SOFA、PCIS、PRISM、PIM这5种重症评分的差异均有统计学意义（13．43±8．70VS．3．48±3．94；78．38±9．33 vs．88．24±6．84；0．1420±0．2147 vs．0．0153±0．0307；5．48±3．42 vs．1．73±1．94；22．02±8．48 vs．12．68±4．88，P均〈0．001）。APACHEⅡ、SOFA、PCIS、PRISM、PIM这5种重症评分的工作特征曲线下面积（95％CI）分别为0．854（0．798，0．910）、0．838（0．778，0．898）、0．881（0．828，0．934）、0．808（0．748，0．869）、0．936（0．913，0．960），PIM的曲线下面积显著高于其他评分。结论5种评分用于评估疾病轻重程度均有效，对评判预后、评估病情严重程度有很好的鉴别能力，尤以PIM更加显著。
文摘SrBi 4 Ti 4O 15 ceramics samples with different Bi content of which mole radio, n (Sr): n (Bi): n (Ti):,is 1:4(1+x):4(x=-0.05,0,0.05,0.10,0.15,0.20),are prepared by solid-state reaction method.Their structure is analyzed by X-ray diffraction,and their dielectricity and ferroelectricity are measured.Results show that pure SrBi 4 Ti 4O 15 pahase exists in the samples whith x=0.05 and 0.10.The sintered ceramics with x=0.05 have good ferroelectric and dielectric properties:The remnant polarization (2 P r) and coercive field ( E c) are 2.86×10 -9 C·m -2 and 8.65×10 6V·m -1 .The dielectric constant (ε r) changes litter in the range from 1 kHz to 4MHz,and ε r is 425 at the frequency of 1 MHz.
