ABSTRACT
In recent years, the world has encountered many epidemic impacts caused by various viruses, COVID-19 has spread and mutated globally since its outbreak in 2019, causing global impact. Nucleic acid detection is an important means for the prevention and control of infectious diseases. Aiming at people who are susceptible to sudden and infectious diseases, considering the control of viral nucleic acid detection cost and completion time, a probabilistic group test optimization method based on the cost and time value is proposed. Firstly, different cost functions to express the pooling and testing costs are used, a probability group test optimization model that considers the pooling and testing costs is established, the optimal combination number of samples for nucleic acid testing is obtained, and the positive probability and the cost functions of the group testing on the optimization result are explored. Secondly, considering the impact of the detection completion time on epidemic control, the sampling ability and detection ability were incorporated into the optimization objective function, then a probability group testing optimization model based on time value is established. Finally, taking COVID-19 nucleic acid detection as an example, the applicability of the model is verified, and the Pareto optimal curve under the minimum cost and shortest detection completion time is obtained. The results show that under normal circumstances, the optimal combination number of samples for nucleic acid detection is about 10. Generally, 10 is used to calculate for the convenience of organization, arrangement and statistics, except for cases where there are special requirements for testing cost and detection completion time.
ABSTRACT
China has made great, strategic achievements in the struggle against COVID-1 9 epidemic, which shows the profound and rich value of the times of the red doctors’ spirit. It not only give noble occupation responsibility and historical mission to the training of medical students in the new era, but also provide value guidance and action guide. Based on the successful experience of COVID-1 9 prevention and control and the special background of the times, set training objectives guided by the demand of society and universities for medical talents, combined with the ideological reality of medical students at present, actively carry out patriotism education, mental health education, professional ethics education and scientific spirit education for medical students through multiple channels such as strengthen the effectiveness of ideological and political theory curriculum, promote the ideological and political construction of curriculum, give full play to the educational function of various practical activities, and using environmental infiltration method to make red culture “live”, with a view to cultivating medical talents with firm politics, superb medical skills, dedication, both ability and political integrity, being able to take on great responsibilities, and helping the construction and development of a healthy China. © 2022, Editorial department of Chinese Medical Ethics. All rights reserved.
ABSTRACT
The case is structured around a real estate owner who is looking for a good marketing plan so that the sale can be increased which is badly affected due to COVID-19 and an investor who wants to purchase a commercial property in easy instalment with monthly rental income. The case is a practical orientation of the time value of money concept in financial management. The investor is in dilemma to select the best option out of the available three options, which is suitable as per his requirements. The case leaves the reader to investigate and suggest to the investor his/her investment decision.
ABSTRACT
The COVID-19 outbreak-caused blockade and disruption of the supply chain have dramatically increased the prices of perishable food and other products that rely heavily on the timeliness of supply chains. In the case of inflation, this study aims to make some adjustment to the pricing and replenishment strategy of perishable food and compare it with the scenario without considering inflation to determine the impact of the inflation rate, quality deterioration, time value of money, and characteristics of cash flow of perishable food sales on the supply chain decision-making. We used the discounted cash flow (DCF) model to measure retailers' revenue, which established that the optimal pricing and replenishing strategy could maximize the retailers' profit. Besides, the findings were compared with the traditional profit model. Moreover, numerical experiments and sensitivity analysis were provided for decision support to retailers. Overall, this study validates that inflation significantly affects the pricing and replenishment strategy, and the DCF model is more suitable to evaluate the profits of perishable food.