目的:分析蓝光辐照度在新生儿高胆红素血症蓝光治疗疗效评估中的作用。方法:选取南京市大厂医院儿科2013年6月至2014年5月收治的高胆红素血症足月新生儿90例,将其随机分为新蓝光组、部分蓝光组及旧蓝光组,每组30例。3组分别应用不同使...目的:分析蓝光辐照度在新生儿高胆红素血症蓝光治疗疗效评估中的作用。方法:选取南京市大厂医院儿科2013年6月至2014年5月收治的高胆红素血症足月新生儿90例,将其随机分为新蓝光组、部分蓝光组及旧蓝光组,每组30例。3组分别应用不同使用时间的蓝光灯予以光照治疗,观察治疗前、后血清总胆红素水平(TSB)下降情况及其与光辐照度之间的相关性。结果:3组患儿临床特征及治疗前TSB差异无统计学意义[304.3(268.6,321.3)μmol/L vs 302.6(268.6,316.2)μmol/L vs 304.3(266.9,321.3)μmol/L,z=3.239,P=0.198],经过蓝光治疗后血清TSB水平均有下降,3组TSB水平呈递增状态[146.2(134.3,158.1)μmol/L vs 180.2(156.4,195.5)μmol/L vs 200.6(190.4,214.2)μmol/L,z=44.796,P=0.000]。3组光辐照度随蓝光灯使用时间延长而逐渐下降[(30.2±2.0)μW·cm^(-2)·nm^(-1) vs(24.3±2.8)μW·cm^(-2)·nm^(-1) vs(18.1±1.9)μW·cm^(-2)·nm^(-1),F=202.872,P<0.001)。Pearson相关分析显示,TSB下降辐度(△TSB)与光辐照度呈明显正相关关系(r=0.846,P=0.000)。结论:蓝光治疗的疗效与光辐照度有关,使用时间越长的蓝光灯光辐照度下降,治疗效果下降。展开更多
The light is one of the important factors for the microalgae growth in the biofuel technology. As biofuel project is large and expensive thus before setting a microalgae based biofuel project in any geographical locat...The light is one of the important factors for the microalgae growth in the biofuel technology. As biofuel project is large and expensive thus before setting a microalgae based biofuel project in any geographical location, it is important to investigate the suitability of all important parameters involving with the system. This paper aims to investigate the sunlight availability and the microalgae growth for a photobioreactor at Chittagong University of Engineering and Technology (CUET). A computational growth model related to the average irradiance is proposed to calculate the growth of microalgae. We observed that average irradiance is the highest in June and is the lowest in December. From our simulation it is found that the growth of microalgae varies with the average irradiance in a year.展开更多
杂散光会影响星像信噪比,降低系统测光精度。为保证50 Bi N望远镜高精度测光观测的要求,对50 Bi N望远镜进行了详细的杂散光分析。在Trace Pro软件中建立精确的仿真模型,计算望远镜本身的点源透过率PST值。根据其特点设计了主镜遮光筒...杂散光会影响星像信噪比,降低系统测光精度。为保证50 Bi N望远镜高精度测光观测的要求,对50 Bi N望远镜进行了详细的杂散光分析。在Trace Pro软件中建立精确的仿真模型,计算望远镜本身的点源透过率PST值。根据其特点设计了主镜遮光筒内的挡光环。由于杂散光的不均匀性对“较差测光”系统影响很大,因此着重分析后,结合MATLAB软件验证了挡光环效果。结果表明：添加挡光环后,CCD像面的杂散光辐照度标准差得到明显改善。在离轴角大于30°时,PST值均在10-10量级,相比无挡光环的情况下降了3-4个数量级。由此说明,添加挡光环可以有效提高望远镜消杂散光的能力。该挡光环可应用于其他天文望远镜,可以在50 Bi N观测网络中广泛推广和应用。展开更多
文摘目的:分析蓝光辐照度在新生儿高胆红素血症蓝光治疗疗效评估中的作用。方法:选取南京市大厂医院儿科2013年6月至2014年5月收治的高胆红素血症足月新生儿90例,将其随机分为新蓝光组、部分蓝光组及旧蓝光组,每组30例。3组分别应用不同使用时间的蓝光灯予以光照治疗,观察治疗前、后血清总胆红素水平(TSB)下降情况及其与光辐照度之间的相关性。结果:3组患儿临床特征及治疗前TSB差异无统计学意义[304.3(268.6,321.3)μmol/L vs 302.6(268.6,316.2)μmol/L vs 304.3(266.9,321.3)μmol/L,z=3.239,P=0.198],经过蓝光治疗后血清TSB水平均有下降,3组TSB水平呈递增状态[146.2(134.3,158.1)μmol/L vs 180.2(156.4,195.5)μmol/L vs 200.6(190.4,214.2)μmol/L,z=44.796,P=0.000]。3组光辐照度随蓝光灯使用时间延长而逐渐下降[(30.2±2.0)μW·cm^(-2)·nm^(-1) vs(24.3±2.8)μW·cm^(-2)·nm^(-1) vs(18.1±1.9)μW·cm^(-2)·nm^(-1),F=202.872,P<0.001)。Pearson相关分析显示,TSB下降辐度(△TSB)与光辐照度呈明显正相关关系(r=0.846,P=0.000)。结论:蓝光治疗的疗效与光辐照度有关,使用时间越长的蓝光灯光辐照度下降,治疗效果下降。
文摘The light is one of the important factors for the microalgae growth in the biofuel technology. As biofuel project is large and expensive thus before setting a microalgae based biofuel project in any geographical location, it is important to investigate the suitability of all important parameters involving with the system. This paper aims to investigate the sunlight availability and the microalgae growth for a photobioreactor at Chittagong University of Engineering and Technology (CUET). A computational growth model related to the average irradiance is proposed to calculate the growth of microalgae. We observed that average irradiance is the highest in June and is the lowest in December. From our simulation it is found that the growth of microalgae varies with the average irradiance in a year.
文摘杂散光会影响星像信噪比,降低系统测光精度。为保证50 Bi N望远镜高精度测光观测的要求,对50 Bi N望远镜进行了详细的杂散光分析。在Trace Pro软件中建立精确的仿真模型,计算望远镜本身的点源透过率PST值。根据其特点设计了主镜遮光筒内的挡光环。由于杂散光的不均匀性对“较差测光”系统影响很大,因此着重分析后,结合MATLAB软件验证了挡光环效果。结果表明：添加挡光环后,CCD像面的杂散光辐照度标准差得到明显改善。在离轴角大于30°时,PST值均在10-10量级,相比无挡光环的情况下降了3-4个数量级。由此说明,添加挡光环可以有效提高望远镜消杂散光的能力。该挡光环可应用于其他天文望远镜,可以在50 Bi N观测网络中广泛推广和应用。
