Online Teaching Practice under the Epidemic Situation of Novel Coronavirus Pneumonia

In the context of preventing and controlling novel coronavirus pneumonia,how to ensure the quality of higher education has become a hot issue of social concern in China.In this article,the problems and challenges are analyzed from teacher,student and technology levels,the teaching pattern of"re-flipped classroom"and the teaching model of"SPOC+MOOC+live broadcast"are proposed,the three teaching methods of PBL,OBE and mind mapping are integrated,the teaching evaluation is introduced to teaching design,and finally,the implementation suggestions are put forward to ensure the quality of teaching.

Environment Promotion and Microclimate Improvement of Old Communities with Combination of Peacetime and Epidemic Situation: A Case Study of Fuguoli Community in Beijing

As the basic unit of a city,community is an important carrier of residents’ healthy life.With the development of society,the environmental status of old communities has been unable to meet the needs of residents’ healthy life,and it is urgent to optimize the community environment.The emergence of novel coronavirus also put forward more strict requirements for the grassroots governance of old communities in China.Taking Fuguoli community in Beijing City as an example,the problems existing in the external environment of old communities were excavated from the perspective of functional requirements,and the distributed green space layout pattern and the dynamic simulation of community microclimate environment was constructed through the method of field survey and numerical simulation.Furthermore,the environmental optimization strategies of old communities with combination of peacetime and epidemic situation were put forward to help the epidemic prevention and control.

Research progress on rapid psychological regulation of pathogenic microorganism epidemic situation

Pathogenic microbial biological epidemics can cause negative emotions such as fear,anxiety,loneliness and depression,as well as somatization symptoms such as insomnia,headache,chest tightness and degenerative behavior.As a secondary disaster of major epidemic situation,this kind of adverse psychological stress needs to be adjusted quickly.The author reviews the rapid psychological regulation methods of novel coronavirus pneumonia(coronavirus disease 2019,Covid-19),aiming to provide a useful enlightenment for the prevention of psychological stress in microorganism epidemic situation.

Practice and Exploration of Online Education and Teaching during the Epidemic Situation——Taking Qingdao Teaching as an Example

The COVID-19 in now has disrupted the normal teaching schedule,but it did not stop the pace of education.Under the national call of“school suspension without suspension”.Qingdao primary school as an example,started a new learning mode of“home-schooling”,to minimum the impact of epidemic prevention and control on the teaching order.Qingdao City set the city’s famous teachers,build diacritical marks teams,create quality courses.Each school undertakes the heavy responsibility,does not show the weakness,the teacher advances the battle,displays the teacher style,discusses the new mode of online education and teaching together.

China to survey hepatitis B epidemic situation

China＇s Ministry of Health is going to launch a nationwide survey on the current epidemic situation of hepatitis B in a bid to give scientific support to the country＇s prevention of the disease.

Self-rescue and Transformation of the Hotel Industry in China under the Epidemic

In order to minimize the impact of COVID-19 on entities such as the hotel industry,this article analyzes the development status of the hotel industry under the epidemic and suggests countermeasures for self-rescue and transformation,such as improving basic settings and optimizing management.These strategies provide ideas and suggestions to comprehensively improve the risk response of hotels and the implementation of sustainable development strategy.

Identification,Isolation and Genomic Characterization of Porcine Astrovirus in Shandong Province,China in 2021-2023

[Objective]The paper was to identify,isolate,and characterize porcine astrovirus in Shandong Province between 2021 and 2023.[Method]A total of 1025 samples of porcine diarrhea samples were collected from various regions of Shandong Province between January 2021 and October 2023.The samples were tested by RT-PCR,followed by sequencing and phylogenetic analyses of the polymerase.[Result]The total positive rate of PAstV was 34.6%(355/1025).The respective proportions of individuals infected with PAstV-1,PAstV-2,PAstV-4 and PAstV-5 were 25.4%(90/355),28.2%(100/355),35.2%(125/355)and 22.5%(80/355),respectively.Additionally,mixed infection was observed.Meanwhile,849 samples of healthy pigs were tested by RT-PCR,and the results demonstrated that the total positive rate of PAstV was 8.13%(69/849).Of these,the proportion of PAstV-1,PAstV-2 and PAstV-4 infection was 27.5%(19/69),37.7%(26/69)and 40.6%(28/69),and a mixed infection also existed.Further sequencing and characterization of some the selected isolates revealed low sequence identities(56.2%)with known PAstV strains,indicating the presence of novel types or genotypes of PAstVs.Furthermore,the isolation conditions of porcine astrovirus were optimized,resulting in the purification of a pure PAstV-4 strain(designated PAstV-4-GRF1).The virus was found to exhibit typical astroviral morphology,with nucleotide identity ranging from 89.9 to 95.4%with previously published PAstV-4 strains.Then,macrovirus transcriptome sequencing showed that 88.30%of the CRF1 samples were mammalian astroviruses.By species classification,PAstV 4 and PAstV 2 accounted for 21.79%and 0.32%,respectively.Phylogenetic tree analysis showed that the c15050 fragment was identical to the GRF-1 sequencing fragment of the isolated strain,and exhibited the highest homology with the Hunan PAstV-4 sequence MK460231 in China.[Conclusion]As the inaugural isolated PAstV-4 strain,it furnishes pivotal materialfor the investigation ofthe biological and pathogenic properties of this virus as well as for the prospectivedevelopment of relevant biological and diagnostic reagents.

Analysis of the Impact of China’s Novel Coronavirus Pneumonia on Chinese Enterprises’ Performance

The outbreak of novel coronavirus pneumonia has affected almost all industries and enterprises.This paper analyzes the impact of the epidemic on the macro economy through GDP and other indicators,analyzes the impact of the epidemic on the overall business performance of the enterprises through the asset turnover speed index of the above scale industrial enterprises,and analyzes the impact of the epidemic on the net profit of the listed companies through the first quarter performance forecast of the listed companies.At last,the paper puts forward that enterprises should improve their awareness and ability to resist risks.

Evaluation and prediction of the status of COVID-19 epidemic prevention and control based on the SEIR+CAQ model

This paper analyzes the spread of the COVID-19 epidemic in China,establishes a SEIR^(+CAQ)epidemiologic model that classifies the diagnosed population into asymptomatic,mild,and severe,and considers the condition of an isolated population.First of all,we theoretically analyzed the key problems of the disease-free equilibrium,stability,and basic reproduction number of the model.Then,combined with the actual data,the development trend of the epidemic situation is simulated and compared,and the influence of some important parameters is discussed in the model evaluation part.Finally,based on the theoretical analysis and numerical simulation results,we forecast the future development of the COVID-19 epidemic and put forward some reasonable scientific suggestions for the government to formulate a future epidemic prevention policy.