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In order to assist ophthalmologists in the diagnosis of fundus diseases, this paper presented a retinal vessel segmentation method based on PST and multi-scale Gaussian filter. Firstly, it enhanced the green channel of color fundus image.Then, it used Gaussian filters with different scales to reduce the noise of retinal vessels with different diameters after preconditioning, and combined with the Gaussian filters, it used the edge detection algorithm of the PST to obtain preliminary retinal vascular segmentation map. Finally, it integrated the initial retinal vessel segmentation maps and denoised the result based on morphology to obtain the final retinal vessel segmentation map. The experiments on DRIVE retinal image database show that the average accuracy is 93%, the average sensitivity is 77%, and the average specificity is 95%. The experimental results verify the effectiveness of the proposed method. [ABSTRACT FROM AUTHOR]

目的探讨低温联合可调钠曲线预防透析低血压的临床效果。方法将2014年1月至2015年12月在该院进行血液透析的86例患者根据透析方式不同分为对照组（40例）和研究组（46例）。对照组患者实施常规血液透析治疗，研究组患者实施低温联合可调钠曲线血液透析治疗，比较两组患者透析前后血压及尿素氮（BUN）、肌酐（SCr）等肾功能指标和血钠水平改变情况。结果透析前，两组患者收缩压和舒张压比较，差异均无统计学意义（P>0.05）；透析后，两组患者收缩压和舒张压较之前降低，且研究组高于对照组，差异均有统计学意义（P<0.05）。透析前，两组患者BUN和SCr等肾功能指标及血钠水平比较，差异均无统计学意义（P>0.05），透析后，两组患者血钠水平比较，差异无统计学意义（P>0.05），而BUN、SCr等肾功能指标较透析前降低，且研究组下降明显，差异均有统计学意义（P<0.05）。结论低温联合可调钠曲线透析疗法对预防透析低血压具有明显作用，可显著减少透析后血压的改变，是临床上预防透析低血压切实可行的治疗方法之一。 [ABSTRACT FROM AUTHOR]

This paper proposed a mobile edge computing offloading strategy based on multi-hop transmission of network connected vehicles. Through the prediction of future vehicle trajectory, it found effectively the best real-time multi-hop transmission path of vehicle network, so as to ensure that the computing task could be successfully unloaded to MEC server within the time delay requirement. The simulation results show that compared with the traditional mobile offloading strategy, the average task delay is lower, the task success rate is higher, and all aspects of performance are better than the traditional edge computing offloading strategy. Among them, the task unloading success rate increases by 10. 06% on average, and the task delay decreases by 8. 62% on average. [ABSTRACT FROM AUTHOR]