Insulating parts are easily subjected to pollution which may cause damage to the electric system. A typical disc insulator is chosen as the target to test its flashover voltage by using an artificial pollution system....Insulating parts are easily subjected to pollution which may cause damage to the electric system. A typical disc insulator is chosen as the target to test its flashover voltage by using an artificial pollution system. This test system aims at obtaining characteristic parameters of damage for chosen conducting sola to the selected insulator. Experimental results show that thickness and electric conductivity of pollutant layer over insulators are the main parameters in damage evaluation. The flashover voltage decreases with increase of thickness and/or conductivity. These results provide a better basis on further revealing the damaging nature of conducting sol materials.展开更多
The kill characteristics of aimed warhead were studied. Emphasis on the improvement of initiation system, experiments and three dimensional numerical investigations were carried out. Simulation results of side three i...The kill characteristics of aimed warhead were studied. Emphasis on the improvement of initiation system, experiments and three dimensional numerical investigations were carried out. Simulation results of side three initiation points fit experiments well. Optimal initiation style is obtained through further simulation. It shows that the effective fragments and the effective kill energy of the optimal scheme increase 12.8% and 10.1% respectively.展开更多
Objective To provide reference for the relevant departments to train and manage online drug sellers.Methods A questionnaire was conducted among 124 grass-roots drug sellers from 13 online drug sales enterprises,includ...Objective To provide reference for the relevant departments to train and manage online drug sellers.Methods A questionnaire was conducted among 124 grass-roots drug sellers from 13 online drug sales enterprises,including Tmall Medical Center and JD Home Health Channel and 265 teachers and students from 33 pharmaceutical colleges and universities.The problems were analyzed in this paper and some specific suggestions were made.Results and Conclusion 389 questionnaires were sent out and 371 effective questionnaires were recovered.The effective recovery rate was 95.37%.The universities surveyed mainly recruited undergraduates,accounting for 66.7%of the total.Most of the employees in the online drug sales enterprises surveyed graduated from secondary school or universities,accounting for 91.9%.The number of graduates surveyed who were willing to work in the online drug sales enterprises was low,accounting for only 8.67%.Besides,it was difficult for online drug sellers to be promoted,71.7%of the respondents had no promotion opportunities.In view of the main problems such as the low professional quality of online drug sellers,their low willingness to engage in online drug sales,and few promotion opportunities,it is suggested the reform of licensed pharmacists should be deepened to improve the number and quality of online drug sellers.Meanwhile,we should learn the advanced experience from developed countries.In addition,the income and welfare of the online drug sellers should be improved.Lastly,a unified management platform must be set up for online drug sellers by technical means.展开更多
With the application of Internet of Things,big data,cloud computing,artificial intelligence,and other cuttingedge technologies,China’s medical informatization is developing rapidly.In this paper,we summaried the role...With the application of Internet of Things,big data,cloud computing,artificial intelligence,and other cuttingedge technologies,China’s medical informatization is developing rapidly.In this paper,we summaried the role of information technology in healthcare sector’s battle against the coronavirus disease 2019(COVID-19)from the perspectives of early warning and monitoring,screening and diagnosis,medical treatment and scientific research,analyzes the bottlenecks of the development of information technology in the post-COVID-19 era,and puts forward feasible suggestions for further promoting the construction of medical informatization from the perspectives of sharing,convenience,and safety.展开更多
基金Sponsored by State Key Laboratory of Explosion Science and Technology Research Foundation (ZDKT08-04)
文摘Insulating parts are easily subjected to pollution which may cause damage to the electric system. A typical disc insulator is chosen as the target to test its flashover voltage by using an artificial pollution system. This test system aims at obtaining characteristic parameters of damage for chosen conducting sola to the selected insulator. Experimental results show that thickness and electric conductivity of pollutant layer over insulators are the main parameters in damage evaluation. The flashover voltage decreases with increase of thickness and/or conductivity. These results provide a better basis on further revealing the damaging nature of conducting sol materials.
文摘The kill characteristics of aimed warhead were studied. Emphasis on the improvement of initiation system, experiments and three dimensional numerical investigations were carried out. Simulation results of side three initiation points fit experiments well. Optimal initiation style is obtained through further simulation. It shows that the effective fragments and the effective kill energy of the optimal scheme increase 12.8% and 10.1% respectively.
文摘Objective To provide reference for the relevant departments to train and manage online drug sellers.Methods A questionnaire was conducted among 124 grass-roots drug sellers from 13 online drug sales enterprises,including Tmall Medical Center and JD Home Health Channel and 265 teachers and students from 33 pharmaceutical colleges and universities.The problems were analyzed in this paper and some specific suggestions were made.Results and Conclusion 389 questionnaires were sent out and 371 effective questionnaires were recovered.The effective recovery rate was 95.37%.The universities surveyed mainly recruited undergraduates,accounting for 66.7%of the total.Most of the employees in the online drug sales enterprises surveyed graduated from secondary school or universities,accounting for 91.9%.The number of graduates surveyed who were willing to work in the online drug sales enterprises was low,accounting for only 8.67%.Besides,it was difficult for online drug sellers to be promoted,71.7%of the respondents had no promotion opportunities.In view of the main problems such as the low professional quality of online drug sellers,their low willingness to engage in online drug sales,and few promotion opportunities,it is suggested the reform of licensed pharmacists should be deepened to improve the number and quality of online drug sellers.Meanwhile,we should learn the advanced experience from developed countries.In addition,the income and welfare of the online drug sellers should be improved.Lastly,a unified management platform must be set up for online drug sellers by technical means.
基金This study was funded by Scientific and Research Project of Health Commission of Hubei Province(Grant No:WJ2019D004).
文摘With the application of Internet of Things,big data,cloud computing,artificial intelligence,and other cuttingedge technologies,China’s medical informatization is developing rapidly.In this paper,we summaried the role of information technology in healthcare sector’s battle against the coronavirus disease 2019(COVID-19)from the perspectives of early warning and monitoring,screening and diagnosis,medical treatment and scientific research,analyzes the bottlenecks of the development of information technology in the post-COVID-19 era,and puts forward feasible suggestions for further promoting the construction of medical informatization from the perspectives of sharing,convenience,and safety.
