The heat collection evaporator was modeled based on equilibrium homogeneous theory, and the Runge-Kutta calculation method was used to analyze and solve the flow in the heat collection evaporator. The influence of environmental factors such as solar irradiance, ambient temperature and wind speed on the variation of refrigerant pressure in two kinds of heat collecting evaporator was analyzed under the set working conditions. The results show that the solar energy irradiance has a great influence on the pressure drop in the tube of serpentine heat collecting evaporator, and the maximum pressure drop of the refrigerant in the tube is 16.3%, minimum pressure drop is 7.8%. However, it has little influence on the pressure drop of the tube sheet evaporator. The maximum pressure drop in the refrigerant tube of the tube sheet evaporator is 4.8%, minimum pressure drop is 1.8%. When the irradiance reaches 800 W/m², the refrigerant in the serpentine-tube evaporator has been completely vaporized at 6 m, it’s completely vaporized at 3 m.

This paper provides new evidence on human resources management within the public sector. We explore the impact and mechanisms of the education and skills of tax inspectors on tax uncertainty using data from A-share-listed companies from 2009 to 2016. Our findings show that tax uncertainty is negatively correlated with the increase in human capital in the tax inspection bureau. That is, tax inspectors with higher levels of education and those who are certified tax agents help reduce tax uncertainty. Further analysis demonstrates that the impact of tax inspectors on tax uncertainty is most pronounced within large-scale and long-established firms.

Branched micro/nano Se was prepared by the redaction of L-Cys•HCl and H₂SeO₃ in hydrothermal method, as β-CD was used as soft template. The structures of products were characterized by SEM, TEM and XRD. Some important factors influencing the morphology of products were studied and discussed, including the amounts of soft template, the reaction temperature and the reaction time. The results showed that external causes had a potent effect on the morphology of micro/nano Se. The uniform branched micro/nano Se prepared under the optimal reaction condition was rhombohedral trigonal selenium t-Se⁰, but its crystallinity degree was low.

Based on our 11 years of medical bachelor's degree education practice for international students in China, combined with the national "the Belt and Road" strategic background and the "Quality Standards of Higher Education for International Students in China (Trial)" issued by the Ministry of Education, this paper explores the strategies to improve the quality of medical education in China. Specifically, it includes: 1) optimizing the enrollment standards of students from countries along the "the Belt and Road"; 2) Improve the quality assurance system for medical bachelor's degree education in China; 3) Innovate the management concept of "convergence"; 4) Establish a comprehensive education system for the cultivation of international students in China; 5) Strengthen the process monitoring role of awarding standards for medical bachelor's degrees in China. To provide theoretical support and reference for our school and sister universities to improve the quality of medical bachelor's degree education in China.