At present,Chinese colleges and universities are facing the reality of the overall physical decline of college students,and the quality of college physical education has been questioned by all parties.In order to impr...At present,Chinese colleges and universities are facing the reality of the overall physical decline of college students,and the quality of college physical education has been questioned by all parties.In order to improve the quality of college physical education and strengthen the physique of college students,this paper first studies the causes of the decline of College Students'overall physique.The study found that,in addition to historical and social factors,many practical factors of college physical education,including teaching content,teaching organization form,teachers’quality,teaching evaluation mechanism and hardware facilities construction,have great influences on the improvement of college students’overall physique.Based on the causes of the decline of college students’overall physique,this paper puts forward feasible promotion strategies from the aspects of physical education curriculum,extracurricular sports activities,and physique monitoring.展开更多
Cordyceps militaris is a well-known edible medicinal fungus.it has a distinctive sensory quality and contains unique nutrients.it undergoes continuous quality degradation,presenting discoloration,moisture loss,texture...Cordyceps militaris is a well-known edible medicinal fungus.it has a distinctive sensory quality and contains unique nutrients.it undergoes continuous quality degradation,presenting discoloration,moisture loss,texture changes,and nutrient and flavor loss.in this study,fumigation was performed with different concentrations of 1-methylcyclopropene(1-MCP)to study the changes in the postharvest quality and physiological indexes of C.militaris during storage at 4℃ in polypropylene packaging.the results reveal that fumigation with 1.0μL/L 1-MCP had the best preservation effect.When stored for 24 days,the respiratory intensity was 435.59 mg/(kg∙h),the lowest weight loss rate was 6.62%,the highest hardness was 3.20 N,and the color change was the smallest.the synthesis of cordycepin,polysaccharides,total phenols,and flavonoids was also promoted.Storage inhibited the synthesis of malondialdehyde and the decrease of the peroxidase(PoD),catalase(CAt),and superoxide dismutase(SoD)activity,effectively extending the shelf life.this study provides a theoretical basis for the storage and preservation of C.militaris.展开更多
Fengyun-4A（FY-4A）, the first of the Chinese next-generation geostationary meteorological satellites, launched in2016, offers several advances over the FY-2： more spectral bands, faster imaging, and infrared hypersp...Fengyun-4A（FY-4A）, the first of the Chinese next-generation geostationary meteorological satellites, launched in2016, offers several advances over the FY-2： more spectral bands, faster imaging, and infrared hyperspectral measurements. To support the major objective of developing the prototypes of FY-4 science algorithms, two science product algorithm testbeds for imagers and sounders have been developed by the scientists in the FY-4 Algorithm Working Group（AWG）. Both testbeds, written in FORTRAN and C programming languages for Linux or UNIX systems, have been tested successfully by using Intel/g compilers. Some important FY-4 science products, including cloud mask, cloud properties, and temperature profiles, have been retrieved successfully through using a proxy imager, Himawari-8/Advanced Himawari Imager（AHI）, and sounder data, obtained from the Atmospheric Infra Red Sounder, thus demonstrating their robustness. In addition, in early 2016, the FY-4 AWG was developed based on the imager testbed—a near real-time processing system for Himawari-8/AHI data for use by Chinese weather forecasters.Consequently, robust and flexible science product algorithm testbeds have provided essential and productive tools for popularizing FY-4 data and developing substantial improvements in FY-4 products.展开更多
Precipitation is one of the most important parameters in Earth system but is hard to measure.China began to develop satellites dedicated to precipitation measurements in the second generation of the FengYun polarorbit...Precipitation is one of the most important parameters in Earth system but is hard to measure.China began to develop satellites dedicated to precipitation measurements in the second generation of the FengYun polarorbiting meteorological satellite program(FY-3).The first of total 2 rainfall missions scheduled,FY-3G,was successfully launched on 16 April 2023 and became the world’s third satellite to measure precipitation with space-borne radar after the tropical rainfall measuring mission in 1997 and global precipitation measurement core observatory in 2014.In this manuscript,we illustrate the platform of FY-3G and instruments mounted in great detail,with additional information about ground segments,designed sensor-based products,and retrieval of geophysical parameters.During the 4 months after launch,the specifications of the platform and instruments are under inspection as calibration and validation are carefully conducted.The first images captured by FY-3G are encouraging,and initial results show a strong capability for providing insights into all kinds of precipitation phenomena.The important work of data processing,such as data assimilation,data fusion between space-based and ground-based radar,and that between polar and geostationary satellites,as well as future applications in weather modification,has been prepared in advance.As a pioneer of China’s rainfall missions,FY-3G greatly improves our ability to provide global precipitation measurements,understand Earth’s water and energy cycle,and forecast extreme events for the benefit of society.展开更多
To assist the Department of Emergency Management in understanding the overall risk characteristics and situation of an urban agglomeration for a reasonable risk prevention and control strategy,this study developed a c...To assist the Department of Emergency Management in understanding the overall risk characteristics and situation of an urban agglomeration for a reasonable risk prevention and control strategy,this study developed a comprehensive multi-hazard risk assessment model for an urban agglomeration with multiple factors.The proposed model includes disaster probability and disaster loss sub-models.The model evaluated four types of disaster risk in urban agglomerations:natural disasters,accidental disasters,public health incidents,and social security incidents.In addition,a variety of factors were integrated into the model,including the socioeconomic foundation of urban agglomerations,the oligopoly effect of core cities,historical disaster losses,the effect of disaster chains,the ability of disaster prevention and mitigation,and intercity coordinated rescue capabilities.Finally,the risk assessment model was applied to the Beijing-Tianjin-Hebei urban agglomeration.The assessment results were compared to the distribution of the new coronavirus pneumonia epidemic in the target urban agglomeration.The results showed that after analyzing the risk characteristics and evaluating the risk levels,the model not only showed the comprehensive risk levels and distribution of urban agglomerations but also revealed the high-risk areas and the key points of risk prevention and control.More importantly,the results obtained through the model can facilitate the strategic planning of disaster prevention and mitigation for urban agglomerations.展开更多
文摘At present,Chinese colleges and universities are facing the reality of the overall physical decline of college students,and the quality of college physical education has been questioned by all parties.In order to improve the quality of college physical education and strengthen the physique of college students,this paper first studies the causes of the decline of College Students'overall physique.The study found that,in addition to historical and social factors,many practical factors of college physical education,including teaching content,teaching organization form,teachers’quality,teaching evaluation mechanism and hardware facilities construction,have great influences on the improvement of college students’overall physique.Based on the causes of the decline of college students’overall physique,this paper puts forward feasible promotion strategies from the aspects of physical education curriculum,extracurricular sports activities,and physique monitoring.
基金financially supported by Edible mushroom resources exploitation and the key technology development in efficient processing(2018YFD0400200)Liaoning Provincial Department of Education Annual Scientific Research Fund Project(LSNZD201903)Shenyang Agricultural University,high-end talent introduction fund(SYAU20160003).
文摘Cordyceps militaris is a well-known edible medicinal fungus.it has a distinctive sensory quality and contains unique nutrients.it undergoes continuous quality degradation,presenting discoloration,moisture loss,texture changes,and nutrient and flavor loss.in this study,fumigation was performed with different concentrations of 1-methylcyclopropene(1-MCP)to study the changes in the postharvest quality and physiological indexes of C.militaris during storage at 4℃ in polypropylene packaging.the results reveal that fumigation with 1.0μL/L 1-MCP had the best preservation effect.When stored for 24 days,the respiratory intensity was 435.59 mg/(kg∙h),the lowest weight loss rate was 6.62%,the highest hardness was 3.20 N,and the color change was the smallest.the synthesis of cordycepin,polysaccharides,total phenols,and flavonoids was also promoted.Storage inhibited the synthesis of malondialdehyde and the decrease of the peroxidase(PoD),catalase(CAt),and superoxide dismutase(SoD)activity,effectively extending the shelf life.this study provides a theoretical basis for the storage and preservation of C.militaris.
基金National Natural Science Foundation(41405035,41571348,and 41405038)China Meteorological Administration Special Public Welfare Research Fund(GYHY201406011 and GYHY201506074)
文摘Fengyun-4A（FY-4A）, the first of the Chinese next-generation geostationary meteorological satellites, launched in2016, offers several advances over the FY-2： more spectral bands, faster imaging, and infrared hyperspectral measurements. To support the major objective of developing the prototypes of FY-4 science algorithms, two science product algorithm testbeds for imagers and sounders have been developed by the scientists in the FY-4 Algorithm Working Group（AWG）. Both testbeds, written in FORTRAN and C programming languages for Linux or UNIX systems, have been tested successfully by using Intel/g compilers. Some important FY-4 science products, including cloud mask, cloud properties, and temperature profiles, have been retrieved successfully through using a proxy imager, Himawari-8/Advanced Himawari Imager（AHI）, and sounder data, obtained from the Atmospheric Infra Red Sounder, thus demonstrating their robustness. In addition, in early 2016, the FY-4 AWG was developed based on the imager testbed—a near real-time processing system for Himawari-8/AHI data for use by Chinese weather forecasters.Consequently, robust and flexible science product algorithm testbeds have provided essential and productive tools for popularizing FY-4 data and developing substantial improvements in FY-4 products.
基金supported by the FY3-03 meteorological satellite project ground application system,and the International Space Water Cycle Observation Constellation Program(grant no.183311KYSB20200015).
文摘Precipitation is one of the most important parameters in Earth system but is hard to measure.China began to develop satellites dedicated to precipitation measurements in the second generation of the FengYun polarorbiting meteorological satellite program(FY-3).The first of total 2 rainfall missions scheduled,FY-3G,was successfully launched on 16 April 2023 and became the world’s third satellite to measure precipitation with space-borne radar after the tropical rainfall measuring mission in 1997 and global precipitation measurement core observatory in 2014.In this manuscript,we illustrate the platform of FY-3G and instruments mounted in great detail,with additional information about ground segments,designed sensor-based products,and retrieval of geophysical parameters.During the 4 months after launch,the specifications of the platform and instruments are under inspection as calibration and validation are carefully conducted.The first images captured by FY-3G are encouraging,and initial results show a strong capability for providing insights into all kinds of precipitation phenomena.The important work of data processing,such as data assimilation,data fusion between space-based and ground-based radar,and that between polar and geostationary satellites,as well as future applications in weather modification,has been prepared in advance.As a pioneer of China’s rainfall missions,FY-3G greatly improves our ability to provide global precipitation measurements,understand Earth’s water and energy cycle,and forecast extreme events for the benefit of society.
基金This work was financially supported by the National Key Research and Development Program of China(2021YFC3090400)National Natural Science Foundation of China(72091512 and 71790613)Hunan Innovative Province Construction Special Fund Project(2020SK2004).
文摘To assist the Department of Emergency Management in understanding the overall risk characteristics and situation of an urban agglomeration for a reasonable risk prevention and control strategy,this study developed a comprehensive multi-hazard risk assessment model for an urban agglomeration with multiple factors.The proposed model includes disaster probability and disaster loss sub-models.The model evaluated four types of disaster risk in urban agglomerations:natural disasters,accidental disasters,public health incidents,and social security incidents.In addition,a variety of factors were integrated into the model,including the socioeconomic foundation of urban agglomerations,the oligopoly effect of core cities,historical disaster losses,the effect of disaster chains,the ability of disaster prevention and mitigation,and intercity coordinated rescue capabilities.Finally,the risk assessment model was applied to the Beijing-Tianjin-Hebei urban agglomeration.The assessment results were compared to the distribution of the new coronavirus pneumonia epidemic in the target urban agglomeration.The results showed that after analyzing the risk characteristics and evaluating the risk levels,the model not only showed the comprehensive risk levels and distribution of urban agglomerations but also revealed the high-risk areas and the key points of risk prevention and control.More importantly,the results obtained through the model can facilitate the strategic planning of disaster prevention and mitigation for urban agglomerations.
