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Background Up to date, whether hemodialysis (HD) or peritoneal dialysis (PD) is a better choice for end-stage renal disease (ESRD) patients has been debatable. Few study comparing HD and PD was from China, a large country with the largest number of dialysis patients in the world. Method A retrospective cohort study was conducted on ESRD patients who began renal replace treatment from January 1st, 2012 and December 31st, 2017 in Guangdong Provincial Hospital of Chinese Medicine. We used propensity scoring match model to balance the baseline conditions and Cox's multivariate regression analysis to compare mortality between HD and PD patients, and evaluated the relationship between mortality and various baseline covariates. Results 436 HD patients and 501 PD patients were included and we found that PD patients had better survival than HD patients (The 1-, 3- and 5-year survival rates were 98.1% vs 96.4%, 86.7% vs 83.0%, and 73.4% vs 71.9%), even though the difference was not statistically significant. For younger ESRD patients (

Recently, intelligent precise spray system with video surveillance tracking target is a research hotspot due to its wide application. Taking the target nozzle of vehicle carrier spraying machine 6WC-30Y-G for the object of study, we propose the target nozzle movement driving signal control plan based on the distributed information of target image chromaticity array. Also, path experiment simulation result indicated that the chromaticity array distribution information of the target image can drive the target nozzle tracking crown outline in effectively to do the spraying movement, thus we can realize the goal of precise pesticide spray. Key word： Precise pesticide spray, spray head, chromaticity array, crown outline

Taking the target nozzle of vehicle carrier spraying machine 6WC-30Y-G for the object of study, we propose the target nozzle movement driving signal control plan based on the distributed information of target image chromaticity array. Also, path experiment simulation result indicated that the chromaticity array distribution information of the target image can drive the target nozzle tracking crown outline in effectively to do the spraying movement, thus we can realize the goal of precise pesticide spray.