Earthquakes are one of the major natural disaster threats worldwide and directly cause substantial economic losses and many casualties every year.Research on the resource and environmental carrying capacity in earthqu...Earthquakes are one of the major natural disaster threats worldwide and directly cause substantial economic losses and many casualties every year.Research on the resource and environmental carrying capacity in earthquake-prone areas is urgently required for regional earthquake relief efforts and post-disaster reconstruction.This study considered Ganzi Tibetan Autonomous Prefecture(Ganzi Prefecture)in Sichuan Province,China,focusing on the impact of the Luding 6.8 Magnitude Earthquake in Ganzi Prefecture in 2022.An evaluation system for the resource and environmental carrying capacity of earthquake-prone areas was established.A total of 23 indicators were selected that cover ecological,social economical,and geological aspects,and the weight of each index was determined by the Analytic Hierarchy Process.The relative ranking of the resource and environmental carrying capacities of each county and city were calculated using the weighted Technique for Order Preference by Similarity to Ideal Solution(TOPSIS).Consequently,the post-disaster reconstruction strategy of Ganzi Prefecture was evaluated and analyzed.The results show that the resource and environmental carrying capacities of each administrative area differ regionally.Evidence shows that the resource and environmental carrying capacity in southeastern Ganzi Prefecture is generally higher than in the northwest,owing to the joint influence of the social economy and ecological and geological environment.This study provides carrying capacity assessment data and support methods for earthquake-prone areas.展开更多
This paper makes an analysis of the impact on the structure of the corridortype train working diagram by increasing the 350 km/h train pairs of Beijing-Shanghai High-speed Railway(HSR).According to the requirements of...This paper makes an analysis of the impact on the structure of the corridortype train working diagram by increasing the 350 km/h train pairs of Beijing-Shanghai High-speed Railway(HSR).According to the requirements of operation speed diversity,the multi-station receiving characteristics of cross-line trains and different train stopping schemes,this paper proposes a scheme of adding 350 km/h train pairs via computer analysis of carrying capability mode.The scheme is divided into three stages:(1)Initial stage:It is planned to increase trains running at 350 km/h,with 15~26 pairs of trains put into operation;(2)Rapid increase stage:27~142 pairs of 350 km/h trains are put into operation;(3)Full replacement stage:143~195 pairs of 350 km/h trains are put into operation,during which the number of cross-line trains under operation is controlled,the number of cross-line trains in each section is determined,the operation and connection scheme of cross-line trains is adjusted and the train stopping scheme is optimized.The results of this study were used for the adjustment of the train working diagram in the third quarter of June 25,2021 to increase the number of 350 km/h train pairs from 19 to 30 on Beijing-Shanghai HSR.350 km/h trains are evenly arranged during 7:00—19:00 on the train working diagram and 300 km/h trains are arranged by making full use of every time and space,to improve the travelling speed on Beijing-Shanghai HSR as a whole.展开更多
基金The Construction Project of China Knowledge Centre for Engineering Sciences and Technology(CKCEST-2022-1-41)。
文摘Earthquakes are one of the major natural disaster threats worldwide and directly cause substantial economic losses and many casualties every year.Research on the resource and environmental carrying capacity in earthquake-prone areas is urgently required for regional earthquake relief efforts and post-disaster reconstruction.This study considered Ganzi Tibetan Autonomous Prefecture(Ganzi Prefecture)in Sichuan Province,China,focusing on the impact of the Luding 6.8 Magnitude Earthquake in Ganzi Prefecture in 2022.An evaluation system for the resource and environmental carrying capacity of earthquake-prone areas was established.A total of 23 indicators were selected that cover ecological,social economical,and geological aspects,and the weight of each index was determined by the Analytic Hierarchy Process.The relative ranking of the resource and environmental carrying capacities of each county and city were calculated using the weighted Technique for Order Preference by Similarity to Ideal Solution(TOPSIS).Consequently,the post-disaster reconstruction strategy of Ganzi Prefecture was evaluated and analyzed.The results show that the resource and environmental carrying capacities of each administrative area differ regionally.Evidence shows that the resource and environmental carrying capacity in southeastern Ganzi Prefecture is generally higher than in the northwest,owing to the joint influence of the social economy and ecological and geological environment.This study provides carrying capacity assessment data and support methods for earthquake-prone areas.
文摘This paper makes an analysis of the impact on the structure of the corridortype train working diagram by increasing the 350 km/h train pairs of Beijing-Shanghai High-speed Railway(HSR).According to the requirements of operation speed diversity,the multi-station receiving characteristics of cross-line trains and different train stopping schemes,this paper proposes a scheme of adding 350 km/h train pairs via computer analysis of carrying capability mode.The scheme is divided into three stages:(1)Initial stage:It is planned to increase trains running at 350 km/h,with 15~26 pairs of trains put into operation;(2)Rapid increase stage:27~142 pairs of 350 km/h trains are put into operation;(3)Full replacement stage:143~195 pairs of 350 km/h trains are put into operation,during which the number of cross-line trains under operation is controlled,the number of cross-line trains in each section is determined,the operation and connection scheme of cross-line trains is adjusted and the train stopping scheme is optimized.The results of this study were used for the adjustment of the train working diagram in the third quarter of June 25,2021 to increase the number of 350 km/h train pairs from 19 to 30 on Beijing-Shanghai HSR.350 km/h trains are evenly arranged during 7:00—19:00 on the train working diagram and 300 km/h trains are arranged by making full use of every time and space,to improve the travelling speed on Beijing-Shanghai HSR as a whole.
