目的观察控制性降压的实施与引起术后认知功能障碍（POCD）的联系。方法将60例ASAⅠ-Ⅱ级、年龄大于60岁、中学及以上文化程度的行择期脊柱手术的患者。随机分为3组,控制性降压Ⅰ、Ⅱ组及非降压组,每组20例,控制性降压Ⅰ组平均动脉压（...目的观察控制性降压的实施与引起术后认知功能障碍（POCD）的联系。方法将60例ASAⅠ-Ⅱ级、年龄大于60岁、中学及以上文化程度的行择期脊柱手术的患者。随机分为3组,控制性降压Ⅰ、Ⅱ组及非降压组,每组20例,控制性降压Ⅰ组平均动脉压（MAP）70-80 mm Hg,Ⅱ组MAP80-85 mm Hg。麻醉前均不用术前药,静脉注射异丙酚、芬太尼、维库溴铵快速诱导气管插管,机械通气,维持呼气末二氧化碳分压在正常范围,麻醉用异丙酚和瑞芬太尼维持,术中定时追加维库溴铵。术中连续监测心率（HR）、MAP,脉搏血氧饱和度（SpO2）。应用简易智力状态检查（MMSE）测试方法调查患者术前和术后1 h、24h、4 d的认知功能变化。结果术后共有25例发生POCD。非降压组与降压Ⅰ、Ⅱ组术后1 h MMSE评分比较,差异有统计学意义（P〈0.01）。降压Ⅰ、Ⅱ组术后24 h MMSE评分两两比较,差异有统计学意义（P〈0.05）。MMSE计算力、近期记忆力评分在术后24 h、术后4 d,非降压组与降压Ⅰ组和Ⅱ组差异有统计学意义（P〈0.05）。结论控制性降压影响老年人POCD,以近期记忆力、计算力影响为甚,且降压程度越大发生POCD的概率越大。展开更多
The central air conditioning system in an intelligent building (IB) was analyzed and modeled in order to perform the optimization scheduling strategy of the central air conditioning system. A set of models proposed ...The central air conditioning system in an intelligent building (IB) was analyzed and modeled in order to perform the optimization scheduling strategy of the central air conditioning system. A set of models proposed and a type of periodically autoregressive model (PAR) based on the improved genetic algorithms (IGA) were used to perform the optimum energy saving scheduling. The example of the Liangmahe Plaza was taken to show the effectiveness of the methods.展开更多
An optimum energy saving scheduling strategy of the central air conditioning system in an intelligent building (IB) was proposed. Based on the system analysis a set of models of the central air conditioning system w...An optimum energy saving scheduling strategy of the central air conditioning system in an intelligent building (IB) was proposed. Based on the system analysis a set of models of the central air conditioning system was established. The periodically autoregressive models (PARM) based on genetic algorithms (GA) were used to predict the next day’s cold load. The improved genetic algorithms (IGA) with stochastic real number coding were used to finish the optimum energy saving scheduling of the system. The simulation results for the building of the Liangmahe Plaza show that the proposed strategy can save energy up to about 24 5%.展开更多
文摘目的观察控制性降压的实施与引起术后认知功能障碍（POCD）的联系。方法将60例ASAⅠ-Ⅱ级、年龄大于60岁、中学及以上文化程度的行择期脊柱手术的患者。随机分为3组,控制性降压Ⅰ、Ⅱ组及非降压组,每组20例,控制性降压Ⅰ组平均动脉压（MAP）70-80 mm Hg,Ⅱ组MAP80-85 mm Hg。麻醉前均不用术前药,静脉注射异丙酚、芬太尼、维库溴铵快速诱导气管插管,机械通气,维持呼气末二氧化碳分压在正常范围,麻醉用异丙酚和瑞芬太尼维持,术中定时追加维库溴铵。术中连续监测心率（HR）、MAP,脉搏血氧饱和度（SpO2）。应用简易智力状态检查（MMSE）测试方法调查患者术前和术后1 h、24h、4 d的认知功能变化。结果术后共有25例发生POCD。非降压组与降压Ⅰ、Ⅱ组术后1 h MMSE评分比较,差异有统计学意义（P〈0.01）。降压Ⅰ、Ⅱ组术后24 h MMSE评分两两比较,差异有统计学意义（P〈0.05）。MMSE计算力、近期记忆力评分在术后24 h、术后4 d,非降压组与降压Ⅰ组和Ⅱ组差异有统计学意义（P〈0.05）。结论控制性降压影响老年人POCD,以近期记忆力、计算力影响为甚,且降压程度越大发生POCD的概率越大。
文摘The central air conditioning system in an intelligent building (IB) was analyzed and modeled in order to perform the optimization scheduling strategy of the central air conditioning system. A set of models proposed and a type of periodically autoregressive model (PAR) based on the improved genetic algorithms (IGA) were used to perform the optimum energy saving scheduling. The example of the Liangmahe Plaza was taken to show the effectiveness of the methods.
文摘An optimum energy saving scheduling strategy of the central air conditioning system in an intelligent building (IB) was proposed. Based on the system analysis a set of models of the central air conditioning system was established. The periodically autoregressive models (PARM) based on genetic algorithms (GA) were used to predict the next day’s cold load. The improved genetic algorithms (IGA) with stochastic real number coding were used to finish the optimum energy saving scheduling of the system. The simulation results for the building of the Liangmahe Plaza show that the proposed strategy can save energy up to about 24 5%.
