目的研究产程中不同的体位和运动对分娩结局的影响。方法选取汕头大学医学院第一附属医院产科2013年7月至2014年12月收治的160名产妇的临床资料,按照产程中不同的体位和运动方式分为干预组(自主体位分娩80名)和对照组(传统体位分娩80名)...目的研究产程中不同的体位和运动对分娩结局的影响。方法选取汕头大学医学院第一附属医院产科2013年7月至2014年12月收治的160名产妇的临床资料,按照产程中不同的体位和运动方式分为干预组(自主体位分娩80名)和对照组(传统体位分娩80名),比较两组新生儿出生Apgar评分、分娩结局、产后2 h出血量、产程及分娩疼痛评分等。结果干预组产妇的自然分娩率、剖宫产率、会阴侧切率(分别为86.25%、6.25%、8.75%)与对照组(分别为68.75%、16.25%、20%)相比,差异有统计学意义(P<0.05)。两组各产程、新生儿出生3 min Apgar评分、分娩疼痛VAS评分、产后2 h出血量等指标比较差异有统计学意义(P<0.05)。结论自主体位在临床产科的使用更贴近产妇心理和生理,有效提高产妇自然分娩率,降低出血量,缩短产程,同时减轻分娩疼痛。展开更多
This paper proposes an event-triggered active disturbance rejection control framework to achieve the simultaneous position and attitude control of a satellite in proximity operations.Firstly,to facilitate the satellit...This paper proposes an event-triggered active disturbance rejection control framework to achieve the simultaneous position and attitude control of a satellite in proximity operations.Firstly,to facilitate the satellite motion description,we derive the relative kinematics and dynamics in terms of dual quaternions with the considerations of internal uncertainties and external disturbances.Then,two kinds of event-triggered mechanisms in the sensor/observer and controller/actuator channels are proposed to reduce the utilization of onboard communication resources and to improve control performance,respectively.The observation error and tracking error of both the attitude and orbit systems are theoretically proven to be asymptotically bounded.Finally,the simulation results show that the proposed method can achieve simultaneous position and attitude tracking between target and chaser satellites with satisfactory control performance and reduced communication rates.展开更多
文摘目的研究产程中不同的体位和运动对分娩结局的影响。方法选取汕头大学医学院第一附属医院产科2013年7月至2014年12月收治的160名产妇的临床资料,按照产程中不同的体位和运动方式分为干预组(自主体位分娩80名)和对照组(传统体位分娩80名),比较两组新生儿出生Apgar评分、分娩结局、产后2 h出血量、产程及分娩疼痛评分等。结果干预组产妇的自然分娩率、剖宫产率、会阴侧切率(分别为86.25%、6.25%、8.75%)与对照组(分别为68.75%、16.25%、20%)相比,差异有统计学意义(P<0.05)。两组各产程、新生儿出生3 min Apgar评分、分娩疼痛VAS评分、产后2 h出血量等指标比较差异有统计学意义(P<0.05)。结论自主体位在临床产科的使用更贴近产妇心理和生理,有效提高产妇自然分娩率,降低出血量,缩短产程,同时减轻分娩疼痛。
文摘This paper proposes an event-triggered active disturbance rejection control framework to achieve the simultaneous position and attitude control of a satellite in proximity operations.Firstly,to facilitate the satellite motion description,we derive the relative kinematics and dynamics in terms of dual quaternions with the considerations of internal uncertainties and external disturbances.Then,two kinds of event-triggered mechanisms in the sensor/observer and controller/actuator channels are proposed to reduce the utilization of onboard communication resources and to improve control performance,respectively.The observation error and tracking error of both the attitude and orbit systems are theoretically proven to be asymptotically bounded.Finally,the simulation results show that the proposed method can achieve simultaneous position and attitude tracking between target and chaser satellites with satisfactory control performance and reduced communication rates.
文摘以蕈状芽孢杆菌代谢产物的4种提取物给小鼠腹腔注射,通过测定血红蛋白值、红细胞数、超氧化物歧化酶（SOD）活性、血清凝集抗体效价、离体白细胞吞噬活性和吞噬细胞杀菌活性,研究了不同提取物对小鼠免疫功能的影响.结果显示,注射提取物各组小鼠的免疫功能均有不同程度增强,乙酸乙酯提取物组、三氯甲烷提取物组、石油醚提取物组的白细胞吞噬活性、吞噬细胞杀菌活性、血清凝集抗体效价、SOD活性与对照组差异极显著（P＜0.01）,剩余液组的吞噬活性和杀菌活性与对照组差异显著（P＜0.05）,其他指标与对照组差异不显著;石油醚提取物组的血红蛋白值（13.52 g/100 mL）和红细胞数（11.35×10^6/mL）最高.各项指标的峰值均出现在第7～21 d.
