目的通过比对血培养阳性标本直接快速药敏试验(RAST)与常规药敏试验结果的符合(CA)比例,探讨血培养RAST的临床应用价值。方法收集2021年4月至2022年4月重庆市第九人民医院血培养阳性标本,革兰阴性杆菌参考欧洲药敏试验委员会(EUCAST)发...目的通过比对血培养阳性标本直接快速药敏试验(RAST)与常规药敏试验结果的符合(CA)比例,探讨血培养RAST的临床应用价值。方法收集2021年4月至2022年4月重庆市第九人民医院血培养阳性标本,革兰阴性杆菌参考欧洲药敏试验委员会(EUCAST)发布的纸片法血培养阳性瓶进行RAST,革兰阳性球菌参考CLSI 2021 M100对血培养阳性标本进行RAST,并将结果与常规药敏试验结果进行比对。结果409例血培养阳性标本中分离培养出大肠埃希菌178株、肺炎克雷伯菌62株、铜绿假单胞菌8株、葡萄球菌100株和肺炎链球菌7株。RAST结果与常规药敏结果相比:肠杆菌在4、6、8 h CA比例分别为78.8%、90.5%、91.5%,6 h药敏结果CA比例优于4 h(P<0.05),但与8 h比较差异无统计学意义(P>0.05)。铜绿假单胞菌在6、8 h CA比例分别为80.4%、92.9%。葡萄球菌在16 h CA比例为90.7%。肺炎链球菌在20~24 h CA比例为100.0%。肠杆菌CA比例最高的药物为庆大霉素,错误率为0的药物为美罗培南,严重错误率最高的为环丙沙星;葡萄球菌CA比例最高的药物为青霉素和利奈唑胺,均为100.0%,克林霉素微小错误率较高,为21.0%。结论血培养RAST能够快速、准确地为临床提供初步药敏结果,指导临床目标性抗感染治疗。展开更多
The carbonate reservoirs in the Tarim Basin are characterized by anisotropy and strong heterogeneity.Combined with an integrated analysis of data from seismic,geology,and drilling results,a series of attributes which ...The carbonate reservoirs in the Tarim Basin are characterized by anisotropy and strong heterogeneity.Combined with an integrated analysis of data from seismic,geology,and drilling results,a series of attributes which are suitable for fractured and caved carbonate reservoir prediction is discussed,including amplitude,coherence analysis,spectra decomposition,seismic absorption attenuation analysis and impedance inversion.Moreover,3-D optimization of these attributes is achieved by integration of multivariate discriminant analysis and principle component analysis,where the logging data are taken as training samples.Using the optimized results,the spatial distribution and configuration features of the caved reservoirs can be characterized in detail.This technique not only improves the understanding of the spatial distribution of current reservoirs but also provides a significant basis for the discovery and production of carbonate reservoirs in the Tarim Basin.展开更多
The flexibility of the media access control(MAC) layer has always been an important concern in the existing communication architecture. To meet the more stringent requirements under large-scale connections, the MAC la...The flexibility of the media access control(MAC) layer has always been an important concern in the existing communication architecture. To meet the more stringent requirements under large-scale connections, the MAC layer structure needs to be optimized carefully. This paper proposes a new architecture of the MAC layer to optimize the complex communication backhaul link structure, which will increase the flexibility of the system and decrease the transmission delay. Moreover, an adaptive transmission time interval(TTI) bundling with self-healing scheme is proposed to further decrease the transmission delay and improve the quality of service(QoS). The simulation results show that the average transmission delay is greatly reduced with our proposed scheme. The bit error rate(BER) and the block error rate are also improved even if the channel changes drastically.展开更多
文摘目的通过比对血培养阳性标本直接快速药敏试验(RAST)与常规药敏试验结果的符合(CA)比例,探讨血培养RAST的临床应用价值。方法收集2021年4月至2022年4月重庆市第九人民医院血培养阳性标本,革兰阴性杆菌参考欧洲药敏试验委员会(EUCAST)发布的纸片法血培养阳性瓶进行RAST,革兰阳性球菌参考CLSI 2021 M100对血培养阳性标本进行RAST,并将结果与常规药敏试验结果进行比对。结果409例血培养阳性标本中分离培养出大肠埃希菌178株、肺炎克雷伯菌62株、铜绿假单胞菌8株、葡萄球菌100株和肺炎链球菌7株。RAST结果与常规药敏结果相比:肠杆菌在4、6、8 h CA比例分别为78.8%、90.5%、91.5%,6 h药敏结果CA比例优于4 h(P<0.05),但与8 h比较差异无统计学意义(P>0.05)。铜绿假单胞菌在6、8 h CA比例分别为80.4%、92.9%。葡萄球菌在16 h CA比例为90.7%。肺炎链球菌在20~24 h CA比例为100.0%。肠杆菌CA比例最高的药物为庆大霉素,错误率为0的药物为美罗培南,严重错误率最高的为环丙沙星;葡萄球菌CA比例最高的药物为青霉素和利奈唑胺,均为100.0%,克林霉素微小错误率较高,为21.0%。结论血培养RAST能够快速、准确地为临床提供初步药敏结果,指导临床目标性抗感染治疗。
基金co-supported by the National Basic Resarch Program of China (Grant No.2011CB201103)the National Scince and Technology Major Project (Grant No.2011ZX05004003)
文摘The carbonate reservoirs in the Tarim Basin are characterized by anisotropy and strong heterogeneity.Combined with an integrated analysis of data from seismic,geology,and drilling results,a series of attributes which are suitable for fractured and caved carbonate reservoir prediction is discussed,including amplitude,coherence analysis,spectra decomposition,seismic absorption attenuation analysis and impedance inversion.Moreover,3-D optimization of these attributes is achieved by integration of multivariate discriminant analysis and principle component analysis,where the logging data are taken as training samples.Using the optimized results,the spatial distribution and configuration features of the caved reservoirs can be characterized in detail.This technique not only improves the understanding of the spatial distribution of current reservoirs but also provides a significant basis for the discovery and production of carbonate reservoirs in the Tarim Basin.
文摘The flexibility of the media access control(MAC) layer has always been an important concern in the existing communication architecture. To meet the more stringent requirements under large-scale connections, the MAC layer structure needs to be optimized carefully. This paper proposes a new architecture of the MAC layer to optimize the complex communication backhaul link structure, which will increase the flexibility of the system and decrease the transmission delay. Moreover, an adaptive transmission time interval(TTI) bundling with self-healing scheme is proposed to further decrease the transmission delay and improve the quality of service(QoS). The simulation results show that the average transmission delay is greatly reduced with our proposed scheme. The bit error rate(BER) and the block error rate are also improved even if the channel changes drastically.
