Real time monitoring of herbicide spray droplet drift is important for crop production management and environmental protection. Existing spray droplet drift detection methods, such as water-sensitive paper and tracers...Real time monitoring of herbicide spray droplet drift is important for crop production management and environmental protection. Existing spray droplet drift detection methods, such as water-sensitive paper and tracers of fluorescence and Rubidium chloride, are time-consuming and laborious, and the accuracies are not high in general. Also, the tracer methods indirectly quantify the spray deposition from the concentration of the tracer and may change the drift characteristics of the sprayed herbicides. In this study, a new optical sensor system was developed to directly detect the spray droplets without the need to add any tracer in the spray liquid. The system was prototyped using a single broadband programmable LED light source and a near infrared sensor containing 6 broadband spectral detectors at 610, 680, 730, 760, 810, and 860 nm to build a detection system for monitoring and analysis of herbicide spray droplet drift. A rotatory structure driven by a stepper motor in the system was created to shift the droplet capture line going under the optical sensor to measure and collect the spectral signals that reflect spray drift droplets along the line. The system prototype was tested for detection of small (Very Fine and Fine), medium (Medium), and large (Coarse) droplets within the droplet classifications of the American Society of Agricultural and Biological Engineers. Laboratory testing results indicated that the system could detect the droplets of different sizes and determine the droplet positions on the droplet capture line with 100% accuracy at the wavelength of 610 nm selected from the 6 bands to detect the droplets.展开更多
目的观察低频脉冲电刺激干预对妇科宫颈癌术后尿潴留的影响。方法选取郑州大学附属洛阳中心医院2014年6月至2015年12月收治的宫颈癌术后拔除尿管残余尿量在100~150 m L患者60例,随机分为对照组和观察组,每组30例。对照组患者给予盆底肌...目的观察低频脉冲电刺激干预对妇科宫颈癌术后尿潴留的影响。方法选取郑州大学附属洛阳中心医院2014年6月至2015年12月收治的宫颈癌术后拔除尿管残余尿量在100~150 m L患者60例,随机分为对照组和观察组,每组30例。对照组患者给予盆底肌群训练、饮水及排尿指导;观察组患者在对照组处理的基础上,配合低频脉冲电刺激治疗,刺激耻骨联合上方曲骨穴及腰骶部S3区。观察2组患者残余尿量并比较尿潴留发生率。结果观察组和对照组患者的残余尿量分别为(23.46±36.37)mL和(86.79±52.32)mL;观察组患者的残余尿量少于对照组(P<0.05)。观察组患者尿潴留发生率为13.3%(4/30),显著低于对照组的63.3%(19/30)(P<0.01)。结论低频脉冲电刺激耻骨联合上方曲骨穴和腰骶部S3区,对防止宫颈癌根治术后尿潴留的发生有显著疗效。展开更多
基金National Natural Science Foundation of China(Nos.82171030,81870678)Natural Science Foundation of Hunan Province,China(No.2021JJ30925)+1 种基金Health Commission of Hunan Province,China(No.B202307026146)Natural Science Foundation of Hainan Province,China(No.821QN1005)。
文摘Real time monitoring of herbicide spray droplet drift is important for crop production management and environmental protection. Existing spray droplet drift detection methods, such as water-sensitive paper and tracers of fluorescence and Rubidium chloride, are time-consuming and laborious, and the accuracies are not high in general. Also, the tracer methods indirectly quantify the spray deposition from the concentration of the tracer and may change the drift characteristics of the sprayed herbicides. In this study, a new optical sensor system was developed to directly detect the spray droplets without the need to add any tracer in the spray liquid. The system was prototyped using a single broadband programmable LED light source and a near infrared sensor containing 6 broadband spectral detectors at 610, 680, 730, 760, 810, and 860 nm to build a detection system for monitoring and analysis of herbicide spray droplet drift. A rotatory structure driven by a stepper motor in the system was created to shift the droplet capture line going under the optical sensor to measure and collect the spectral signals that reflect spray drift droplets along the line. The system prototype was tested for detection of small (Very Fine and Fine), medium (Medium), and large (Coarse) droplets within the droplet classifications of the American Society of Agricultural and Biological Engineers. Laboratory testing results indicated that the system could detect the droplets of different sizes and determine the droplet positions on the droplet capture line with 100% accuracy at the wavelength of 610 nm selected from the 6 bands to detect the droplets.
文摘目的观察低频脉冲电刺激干预对妇科宫颈癌术后尿潴留的影响。方法选取郑州大学附属洛阳中心医院2014年6月至2015年12月收治的宫颈癌术后拔除尿管残余尿量在100~150 m L患者60例,随机分为对照组和观察组,每组30例。对照组患者给予盆底肌群训练、饮水及排尿指导;观察组患者在对照组处理的基础上,配合低频脉冲电刺激治疗,刺激耻骨联合上方曲骨穴及腰骶部S3区。观察2组患者残余尿量并比较尿潴留发生率。结果观察组和对照组患者的残余尿量分别为(23.46±36.37)mL和(86.79±52.32)mL;观察组患者的残余尿量少于对照组(P<0.05)。观察组患者尿潴留发生率为13.3%(4/30),显著低于对照组的63.3%(19/30)(P<0.01)。结论低频脉冲电刺激耻骨联合上方曲骨穴和腰骶部S3区,对防止宫颈癌根治术后尿潴留的发生有显著疗效。
