Due to the impact of the COVID-19 pandemic,e-commerce and social media pervade people’s daily life,while offline businesses suffer from loss from traffic.In this paper the SWOT analysis method is employed to examine ...Due to the impact of the COVID-19 pandemic,e-commerce and social media pervade people’s daily life,while offline businesses suffer from loss from traffic.In this paper the SWOT analysis method is employed to examine the strengths,weaknesses,opportunities,and threats for RED,which,as one of the top content social e-commerce platforms in China,achieves outstanding performance under the COVID-19 pandemic.This paper tackles RED’s unique marketing and operating strategies,as well as its weaknesses that relate to operation and costs,and threats that relate to competitors and commercialization.Beside these disadvantages,profitable opportunities also arise from internal and external environment.At the end,the paper provides suggestions for capturing profitable opportunities under the pandemic and Chinese new regulations on cross-border e-commerce.展开更多
Helmert’s second method of condensation is an effective method for terrain reduction in the geoid and quasi-geoid determinations. Condensing the masses outside the geoid to a surface layer on the geoid produces sever...Helmert’s second method of condensation is an effective method for terrain reduction in the geoid and quasi-geoid determinations. Condensing the masses outside the geoid to a surface layer on the geoid produces several forms of topographic effects: direct effect on gravity, secondary indirect effect on gravity and indirect effects on the (quasi-) geoid, respectively. To strike a balance between computation accuracy and numerical efficiency, the global integration region of topographic effects is usually divided into near zone and far zone. We focus on the computation of near-zone topographic effects, which are functions of actual topographic masses and condensed masses. Since there have already been mature formulas for gravitational attraction and potential of actual topographic masses using rectangular prism model, we put forward surface element model for condensed masses. Afterwards, the formulas for near-zone direct and indirect effects are obtained easily by combining the rectangular prism model and surface element model. To overcome the planar approximation errors involved with the new formulas for near-zone topographic effects, the Earth’s curvature can be taken into account. It is recommended to apply the formulas based on the rectangular prism and surface element considering the Earth’s curvature to calculate near-zone topographic effects for high-accuracy demand to determine geoid and quasi-geoid.展开更多
文摘Due to the impact of the COVID-19 pandemic,e-commerce and social media pervade people’s daily life,while offline businesses suffer from loss from traffic.In this paper the SWOT analysis method is employed to examine the strengths,weaknesses,opportunities,and threats for RED,which,as one of the top content social e-commerce platforms in China,achieves outstanding performance under the COVID-19 pandemic.This paper tackles RED’s unique marketing and operating strategies,as well as its weaknesses that relate to operation and costs,and threats that relate to competitors and commercialization.Beside these disadvantages,profitable opportunities also arise from internal and external environment.At the end,the paper provides suggestions for capturing profitable opportunities under the pandemic and Chinese new regulations on cross-border e-commerce.
基金The National Natural Science Foundation of China (41674025,41674082)The Independent Research Foundation of State Key Laboratory of Geo-information Engineering (SKLGIE2018-ZZ-10).
文摘Helmert’s second method of condensation is an effective method for terrain reduction in the geoid and quasi-geoid determinations. Condensing the masses outside the geoid to a surface layer on the geoid produces several forms of topographic effects: direct effect on gravity, secondary indirect effect on gravity and indirect effects on the (quasi-) geoid, respectively. To strike a balance between computation accuracy and numerical efficiency, the global integration region of topographic effects is usually divided into near zone and far zone. We focus on the computation of near-zone topographic effects, which are functions of actual topographic masses and condensed masses. Since there have already been mature formulas for gravitational attraction and potential of actual topographic masses using rectangular prism model, we put forward surface element model for condensed masses. Afterwards, the formulas for near-zone direct and indirect effects are obtained easily by combining the rectangular prism model and surface element model. To overcome the planar approximation errors involved with the new formulas for near-zone topographic effects, the Earth’s curvature can be taken into account. It is recommended to apply the formulas based on the rectangular prism and surface element considering the Earth’s curvature to calculate near-zone topographic effects for high-accuracy demand to determine geoid and quasi-geoid.
