Background:Systematic evaluation of the successful heartbeat recovery rate(HRR)in patients during the platinum ten minutes after cardiac arrest.Methods:The databases of CNKI(January 1979–March 2019),Chongqing VIP(Jan...Background:Systematic evaluation of the successful heartbeat recovery rate(HRR)in patients during the platinum ten minutes after cardiac arrest.Methods:The databases of CNKI(January 1979–March 2019),Chongqing VIP(January 1989–March 2019),Wanfang(January 1990–March 2019)and Web of Science(January 1900-May 2020)were searched.To collect the clinical data of patients with cardiac arrest before hospitalization and analyze the cardiopulmonary resuscitation(CPR)at different times.Literature selection and data extraction were carried out by two researchers independently,and the meta package of R software(version 3.61)was used for analysis.Results:A total of 116 papers met the inclusion criteria,including 37,181 patients.Of these patients,3367 had their heartbeats successfully restored.The results showed a high degree of heterogeneity(χ2=6999.21,P<0.01,I2=97.6%).The meta-analysis was conducted using a random-effects model.The combined effect size was 0.199(0.157–0.250).(1)According to the five CPR groups(International Cardiopulmonary Resuscitation Guide 2000,2005,2010,2015 and other versions),the HRR of other versions[0.264(0.176–0.375)]was higher than the International Cardiopulmonary Resuscitation 2005 edition[0.121(0.092–0.158)].(2)The rescue time was divided into the 0 to≤5 min group,the 5 to≤10 min group,the 10 to≤15 min group,and the>15 min group.The HRR were 0.417(0.341–0.496),0.143(0.104–0.193),0.049(0.034–0.069),and 0.022(0.009–0.051),respectively.The HRR was higher in the 0 to≤5 min group than in the 5 to≤10 min group,the 10 to≤15 min group and the>15 min group.There was no difference between the 10 to≤15 min group and the>15 min group.(3)When the groups were stratified with the cutoff of 10 min,the≤10 min group HRR[0.250(0.202–0.306)]was higher than the>10 min group rate[0.041(0.029–0.057)].(4)The HRR of the telephone guidance group was[0.273(0.227–0.325)]lower than that of the 0 to≤5 min group[0.429(0.347–0.516)]but higher than that of the 5 to≤10 min group,the 10 to≤15 min group,and the>15 min group.(5)The HRR of the witness group[0.325(0.216–0.458)]was not different from that of the 0 to≤5 min group,but it was higher than those of the 5 to≤10 min group,the 10 to≤15 min group and the>15 min group.(6)There was no significant difference HRR between the witnessed group,the telephone guidance group and the≤10 min group.Conclusions:(1)The HRR is time-sensitive,and early rescue can improve it.(2)CPR performed within the platinum ten minutes must be executed by the public,and other forces are auxiliary.(3)The concept of peri-cardiac arrest period(PCAP)should be established and improved to guide CPR.展开更多
为了更准确全面的计算风电场发电量,准确评估风电场效能情况,本文基于风电场中风电机组运行数据,同时考虑风电机组类型及其实际运行情况,提出三种筛选算法,区分正常数据与降容数据,同时创新性的利用标签分类的方法,对风电机组数据采集...为了更准确全面的计算风电场发电量,准确评估风电场效能情况,本文基于风电场中风电机组运行数据,同时考虑风电机组类型及其实际运行情况,提出三种筛选算法,区分正常数据与降容数据,同时创新性的利用标签分类的方法,对风电机组数据采集与监视控制系统(supervisory control and data acquisition,SCADA)得到的10min数据进行标记。据此计算风电机组的损失电量。该算法的提出完善了风电行业对于风电机组10min数据、异常申诉数据等运行数据划分的欠缺,并且更加全面有效的计算、描绘出了风电场发电水平。展开更多
为了更准确全面的计算风电场发电量,准确评估风电场效能情况,本文基于风电场中风电机组运行数据,同时考虑风电机组类型及其实际运行情况,提出3种筛选算法,区分正常数据与降容数据,同时创新性的利用标签分类的方法,对风电机组数据采集与...为了更准确全面的计算风电场发电量,准确评估风电场效能情况,本文基于风电场中风电机组运行数据,同时考虑风电机组类型及其实际运行情况,提出3种筛选算法,区分正常数据与降容数据,同时创新性的利用标签分类的方法,对风电机组数据采集与监视控制系统(supervisory control and data acquisition,SCADA)得到的10min数据进行标记。据此计算风电机组的损失电量。该算法的提出完善了风电行业对于风电机组10min数据、异常申诉数据等运行数据划分的欠缺,并且更加全面有效的计算、描绘出了风电场发电水平。展开更多
文摘Background:Systematic evaluation of the successful heartbeat recovery rate(HRR)in patients during the platinum ten minutes after cardiac arrest.Methods:The databases of CNKI(January 1979–March 2019),Chongqing VIP(January 1989–March 2019),Wanfang(January 1990–March 2019)and Web of Science(January 1900-May 2020)were searched.To collect the clinical data of patients with cardiac arrest before hospitalization and analyze the cardiopulmonary resuscitation(CPR)at different times.Literature selection and data extraction were carried out by two researchers independently,and the meta package of R software(version 3.61)was used for analysis.Results:A total of 116 papers met the inclusion criteria,including 37,181 patients.Of these patients,3367 had their heartbeats successfully restored.The results showed a high degree of heterogeneity(χ2=6999.21,P<0.01,I2=97.6%).The meta-analysis was conducted using a random-effects model.The combined effect size was 0.199(0.157–0.250).(1)According to the five CPR groups(International Cardiopulmonary Resuscitation Guide 2000,2005,2010,2015 and other versions),the HRR of other versions[0.264(0.176–0.375)]was higher than the International Cardiopulmonary Resuscitation 2005 edition[0.121(0.092–0.158)].(2)The rescue time was divided into the 0 to≤5 min group,the 5 to≤10 min group,the 10 to≤15 min group,and the>15 min group.The HRR were 0.417(0.341–0.496),0.143(0.104–0.193),0.049(0.034–0.069),and 0.022(0.009–0.051),respectively.The HRR was higher in the 0 to≤5 min group than in the 5 to≤10 min group,the 10 to≤15 min group and the>15 min group.There was no difference between the 10 to≤15 min group and the>15 min group.(3)When the groups were stratified with the cutoff of 10 min,the≤10 min group HRR[0.250(0.202–0.306)]was higher than the>10 min group rate[0.041(0.029–0.057)].(4)The HRR of the telephone guidance group was[0.273(0.227–0.325)]lower than that of the 0 to≤5 min group[0.429(0.347–0.516)]but higher than that of the 5 to≤10 min group,the 10 to≤15 min group,and the>15 min group.(5)The HRR of the witness group[0.325(0.216–0.458)]was not different from that of the 0 to≤5 min group,but it was higher than those of the 5 to≤10 min group,the 10 to≤15 min group and the>15 min group.(6)There was no significant difference HRR between the witnessed group,the telephone guidance group and the≤10 min group.Conclusions:(1)The HRR is time-sensitive,and early rescue can improve it.(2)CPR performed within the platinum ten minutes must be executed by the public,and other forces are auxiliary.(3)The concept of peri-cardiac arrest period(PCAP)should be established and improved to guide CPR.
文摘为了更准确全面的计算风电场发电量,准确评估风电场效能情况,本文基于风电场中风电机组运行数据,同时考虑风电机组类型及其实际运行情况,提出三种筛选算法,区分正常数据与降容数据,同时创新性的利用标签分类的方法,对风电机组数据采集与监视控制系统(supervisory control and data acquisition,SCADA)得到的10min数据进行标记。据此计算风电机组的损失电量。该算法的提出完善了风电行业对于风电机组10min数据、异常申诉数据等运行数据划分的欠缺,并且更加全面有效的计算、描绘出了风电场发电水平。
文摘为了更准确全面的计算风电场发电量,准确评估风电场效能情况,本文基于风电场中风电机组运行数据,同时考虑风电机组类型及其实际运行情况,提出3种筛选算法,区分正常数据与降容数据,同时创新性的利用标签分类的方法,对风电机组数据采集与监视控制系统(supervisory control and data acquisition,SCADA)得到的10min数据进行标记。据此计算风电机组的损失电量。该算法的提出完善了风电行业对于风电机组10min数据、异常申诉数据等运行数据划分的欠缺,并且更加全面有效的计算、描绘出了风电场发电水平。
