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整流站采用二极管整流器能够提升远距离大容量海上风电直流送出系统的经济性和可靠性。提出了基于24脉动二极管整流器的海上风电并网系统中交流滤波器的优化配置方法。首先，明确了基于24脉动二极管整流器的海上风电送出系统结构，阐述了24脉动二极管整流器的基本原理。然后，计算了24脉动二极管整流器的无功功率需求，对于24脉动二极管整流器，可以将设计复杂的交流滤波器简化为电容器，通过对有功功率变化范围内不同容量电容器滤波效果进行扫描，提出了综合考虑滤波效果和滤波器容量的交流滤波器无功容量优化方法。最后，在PSCAD/EMTDC中对基于24脉动二极管整流器的海上风电送出测试系统进行了谐波分析和交流滤波器优化设计。

为了解决新冠肺炎疫情医疗资源的合理调配问题，以武汉方舱新冠肺炎疫情数据为基础，融合舆情、时空轨迹等多源数据，针对疫情防控搭建了方舱医院动态调控平台。引入水滴图表征方式动态监测方舱医院，采用主题模型融合情感词典提取群众情感特征，并借助WordStream呈现城市舆情发展，提出基于医院负载量的路径规划算法实现合理路线推荐，提供面向群众的科普信息和城市复苏板块以提升抗疫信心。该系统有利于实现人力、物力的合理配置，及时引导群众的情绪动向，关注新政策/决定发布后的舆情变化，减缓患者聚集现象。最后，结合多组案例分析验证了系统的功能性和有效性。

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本文用统计学方法,对相同人和不同人的血清痕之交叉免疫电泳泳谱的分析,比较,结果发现;相同人之1日血清痕与不同人10日血清痕之交叉免疫电泳泳谱的变异系数分布无明显重叠,故可进行个人识别。

The research on recurrent laryngeal nerve injury (RLNI) in thyroid surgery was searched in PubMed, Web of Science, China National Knowledge Infrastructure (CNKI) and other databases. The key words included recurrent laryngeal nerve repair, injection laryngoplasty, type I thyroplasty, arytenoid cartilage adduction, neural tissue engineering technology, etc. The common treatment methods of RLNI were summarized and compared. The results showed that direct suture of recurrent laryngeal nerve was the first choice for repair, cervical loop-recurrent laryngeal nerve anastomosis was the most commonly used in clinic, and other repair methods had their advantages and disadvantages. Most treatment methods can achieve different results to some extent, but there are still shortcomings that need to be further overcome. In addition, neural tissue engineering technology and traditional Chinese medicine rehabilitation therapy are worthy of further exploration and attention. [ABSTRACT FROM AUTHOR]

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Aiming at the problem that it is difficult to recover valuable zinc from industrial solid wastes such as zinc oxide tailings and Grain slags, this paper prepares high-purity zinc oxide micro powder by using carbothermal reduction and oxidation method with local industrial zinc-containing solid wastes as raw materials. The thermodynamic process of the reaction between zinc silicate and carbon reduction in the zinc-containing slag was analyzed by a combination of thermodynamic calculations and experimental studies through HSC Chemistry. The effects of carbon allocation, roasting temperature, roasting time and CaF2 on zinc yield during zinc silicate reduction were discussed, and the results showed that the catalytic effect was most significant at 1000 ℃~1100 ℃ when CaF2 was used as a catalyst. The optimum process conditions were obtained: the zinc yield reached 97.44% at a temperature of 1100 °C, a holding time of 40 min, a carbon content of 20 wt% and a CaF2 addition of 5 wt%. Structural and compositional analyses of the volatilized product showed that the physical phase was hexagonal zinc oxide crystals with a particle size of 2~4 um and a purity of 99.47%. [ABSTRACT FROM AUTHOR]

Objective To evaluate the effectiveness of the "WeChat + scenario simulation" interactive teaching mode in the practice of nutrition counseling and education, and to provide reference for the cultivation of undergraduate students' competence in the workplace. Methods Experimental group and control group were set up. "WeChat + situational simulation" interactive teaching mode and "situational simulation" teaching mode were applied to the two groups respectively. Results The initiative and enthusiasm, team cooperation ability, problem-solving ability, communication ability， professional knowledge and skill application ability of the experimental group were better than those of the control group（ all P < 0.05）. In doctor-patient communication, the ability of preparation, information giving and understanding patients in the experimental group were better than those in the control group（all P < 0.05）. The learning completion, chapter test scores and total score of formative assessment in the experimental group were higher than those in the control group（ all P < 0.05） . Conclusion The interactive teaching mode of "wechat + scenario simulation" has a good effect on improving the practical ability of undergraduates in nutrition, and can provide a reference for the training of undergraduates' post competence. [ABSTRACT FROM AUTHOR]

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