在线社交网络(online social networks,OSN)中舆情传播干预时机的选择对网络舆情的管控具有重要意义.通过分析用户的网络地位、社会强化效应与用户感知价值等影响网络舆情传播控制的关键因素,以研究舆情管控的合理干预时机为目的,构建...在线社交网络(online social networks,OSN)中舆情传播干预时机的选择对网络舆情的管控具有重要意义.通过分析用户的网络地位、社会强化效应与用户感知价值等影响网络舆情传播控制的关键因素,以研究舆情管控的合理干预时机为目的,构建了基于用户相对权重的网络舆情传播控制模型.基于该模型,针对两类OSN开展仿真研究.研究发现,网络舆情传播与信息初始传播源的网络地位密切相关;在开放式OSN中,存在与干预时机选择关系密切的关键相变点;用户活跃度随社会强化效应强度的增大而下降,随干预时机的提前而降低,并存在有效干预时机区间;“悖民意”成本是干预时机选择的重要衡量指标.并据此,提出了相应现实干预时机选择的对策建议.展开更多
Background The controversy on the treatment strategy for severe acute pancreatitis （SAP） has never stopped for the past century.Even now surgical procedures play a decisive role in the treatment of SAP,especially in...Background The controversy on the treatment strategy for severe acute pancreatitis （SAP） has never stopped for the past century.Even now surgical procedures play a decisive role in the treatment of SAP,especially in managing the related complications,but the rational indications,timing,and approaches of surgical intervention for SAP are still inconclusive.Methods Clinical data of 308 SAP patients recruited during January 2000-January 2013,including 96 conservatively treated cases plus 212 surgically intervened cases,were comparatively analyzed.Based on the initial surgical intervention time,the surgical intervention group was split into two：early intervention group （within 2 weeks） 103 cases,and late intervention group （after 2 weeks） 109 cases.Results In the conservative treatment group,the cure rate was 82.29% （79/96）,the death rate was 13.54% （13/96）,and 4 cases self-discharged,while in the surgical intervention group,the cure rate was 84.43% （179/212） and the death rate was 10.85% （23/212） with 10 cases self-discharged.The difference was of no statistical significance between these two groups （P 〉0.05）.In surgical intervention group,the death rate 15.53% （16/103） in the early surgical intervention group was higher than that of late surgical intervention group 6.42% （7/109）,and the difference was statistically significant （P 〈0.05）.Conclusions Both conservative treatment and surgical intervention play important roles in the treatment of SAP,and the indication,timing,and procedure should be strictly followed.Surgery earlier than 2 weeks after onset of the disease is not recommended in patients with necrotizing pancreatitis only when there are specific indications,such as multiple organ failure,which does not improve despite active treatment,and in those who develop abdominal compartment syndrome.展开更多
文摘在线社交网络(online social networks,OSN)中舆情传播干预时机的选择对网络舆情的管控具有重要意义.通过分析用户的网络地位、社会强化效应与用户感知价值等影响网络舆情传播控制的关键因素,以研究舆情管控的合理干预时机为目的,构建了基于用户相对权重的网络舆情传播控制模型.基于该模型,针对两类OSN开展仿真研究.研究发现,网络舆情传播与信息初始传播源的网络地位密切相关;在开放式OSN中,存在与干预时机选择关系密切的关键相变点;用户活跃度随社会强化效应强度的增大而下降,随干预时机的提前而降低,并存在有效干预时机区间;“悖民意”成本是干预时机选择的重要衡量指标.并据此,提出了相应现实干预时机选择的对策建议.
文摘Background The controversy on the treatment strategy for severe acute pancreatitis （SAP） has never stopped for the past century.Even now surgical procedures play a decisive role in the treatment of SAP,especially in managing the related complications,but the rational indications,timing,and approaches of surgical intervention for SAP are still inconclusive.Methods Clinical data of 308 SAP patients recruited during January 2000-January 2013,including 96 conservatively treated cases plus 212 surgically intervened cases,were comparatively analyzed.Based on the initial surgical intervention time,the surgical intervention group was split into two：early intervention group （within 2 weeks） 103 cases,and late intervention group （after 2 weeks） 109 cases.Results In the conservative treatment group,the cure rate was 82.29% （79/96）,the death rate was 13.54% （13/96）,and 4 cases self-discharged,while in the surgical intervention group,the cure rate was 84.43% （179/212） and the death rate was 10.85% （23/212） with 10 cases self-discharged.The difference was of no statistical significance between these two groups （P 〉0.05）.In surgical intervention group,the death rate 15.53% （16/103） in the early surgical intervention group was higher than that of late surgical intervention group 6.42% （7/109）,and the difference was statistically significant （P 〈0.05）.Conclusions Both conservative treatment and surgical intervention play important roles in the treatment of SAP,and the indication,timing,and procedure should be strictly followed.Surgery earlier than 2 weeks after onset of the disease is not recommended in patients with necrotizing pancreatitis only when there are specific indications,such as multiple organ failure,which does not improve despite active treatment,and in those who develop abdominal compartment syndrome.
