The shear stress generated by the wind on the land surface is the driving force that results in the wind erosion of the soil.It is an independent factor influencing soil wind erosion.The factors related to wind erosiv...The shear stress generated by the wind on the land surface is the driving force that results in the wind erosion of the soil.It is an independent factor influencing soil wind erosion.The factors related to wind erosivity,known as submodels,mainly include the weather factor(WF)in revised wind erosion equation(RWEQ),the erosion submodel(ES)in wind erosion prediction system(WEPS),as well as the drift potential(DP)in wind energy environmental assessment.However,the essential factors of WF and ES contain wind,soil characteristics and surface coverings,which therefore results in the interdependence between WF or ES and other factors(e.g.,soil erodible factor)in soil erosion models.Considering that DP is a relative indicator of the wind energy environment and does not have the value of expressing wind to induce shear stress on the surface.Therefore,a new factor is needed to express accurately wind erosivity.Based on the theoretical basis that the soil loss by wind erosion(Q)is proportional to the shear stress of the wind on the soil surface,a new model of wind driving force(WDF)was established,which expresses the potential capacity of wind to drive soil mass in per unit area and a period of time.Through the calculations in the typical area,the WDF,WF and DP are compared and analyzed from the theoretical basis,construction goal,problem-solving ability and typical area application;the spatial distribution of soil wind erosion intensity was concurrently compared with the spatial distributions of the WDF,WF and DP values in the typical area.The results indicate that the WDF is better to reflect the potential capacity of wind erosivity than WF and DP,and that the WDF model is a good model with universal applicability and can be logically incorporated into the soil wind erosion models.展开更多
With an emphasis on hiring the best Chinese and foreign shipbuilding talent,Hangzhou’s Sino-Eagle Yacht Co.,Ltd.has worked its way up to become the world’s leading yacht manufacturer.
In recent years,Hangzhou has rolled out several generous policies to lure and retain skilled workers and degree holders,helping the city’s appeal to overseas talents grow.“Working in Hangzhou,the one thing impressed...In recent years,Hangzhou has rolled out several generous policies to lure and retain skilled workers and degree holders,helping the city’s appeal to overseas talents grow.“Working in Hangzhou,the one thing impressed me most was the local government officials who often visit us and offer us timely support,”gushed Joe Buetzler from Germany during an interview.展开更多
In order to maintain a competitive edge,local authorities in Xiaoshan have put forward a series of preferential policies in the fields of talent recruitment.Xiaoshan district,southern gateway of Hangzhou,has enjoyed a...In order to maintain a competitive edge,local authorities in Xiaoshan have put forward a series of preferential policies in the fields of talent recruitment.Xiaoshan district,southern gateway of Hangzhou,has enjoyed a comprehensive strength that has made it among the top districts and counties in Zhejiang province.The fast pace of economic development has given the district an obvious advantage in maintaining a net inflow of talents.展开更多
The Hangzhou International Alliance and the International Talent Club formed on Nov.2020 to attract more talents and further push the internationalization of Hangzhou.
基金This work was supported by the National Natural Science Foundation of China(41330746,41630747).
文摘The shear stress generated by the wind on the land surface is the driving force that results in the wind erosion of the soil.It is an independent factor influencing soil wind erosion.The factors related to wind erosivity,known as submodels,mainly include the weather factor(WF)in revised wind erosion equation(RWEQ),the erosion submodel(ES)in wind erosion prediction system(WEPS),as well as the drift potential(DP)in wind energy environmental assessment.However,the essential factors of WF and ES contain wind,soil characteristics and surface coverings,which therefore results in the interdependence between WF or ES and other factors(e.g.,soil erodible factor)in soil erosion models.Considering that DP is a relative indicator of the wind energy environment and does not have the value of expressing wind to induce shear stress on the surface.Therefore,a new factor is needed to express accurately wind erosivity.Based on the theoretical basis that the soil loss by wind erosion(Q)is proportional to the shear stress of the wind on the soil surface,a new model of wind driving force(WDF)was established,which expresses the potential capacity of wind to drive soil mass in per unit area and a period of time.Through the calculations in the typical area,the WDF,WF and DP are compared and analyzed from the theoretical basis,construction goal,problem-solving ability and typical area application;the spatial distribution of soil wind erosion intensity was concurrently compared with the spatial distributions of the WDF,WF and DP values in the typical area.The results indicate that the WDF is better to reflect the potential capacity of wind erosivity than WF and DP,and that the WDF model is a good model with universal applicability and can be logically incorporated into the soil wind erosion models.
文摘With an emphasis on hiring the best Chinese and foreign shipbuilding talent,Hangzhou’s Sino-Eagle Yacht Co.,Ltd.has worked its way up to become the world’s leading yacht manufacturer.
文摘In recent years,Hangzhou has rolled out several generous policies to lure and retain skilled workers and degree holders,helping the city’s appeal to overseas talents grow.“Working in Hangzhou,the one thing impressed me most was the local government officials who often visit us and offer us timely support,”gushed Joe Buetzler from Germany during an interview.
文摘In order to maintain a competitive edge,local authorities in Xiaoshan have put forward a series of preferential policies in the fields of talent recruitment.Xiaoshan district,southern gateway of Hangzhou,has enjoyed a comprehensive strength that has made it among the top districts and counties in Zhejiang province.The fast pace of economic development has given the district an obvious advantage in maintaining a net inflow of talents.
文摘The Hangzhou International Alliance and the International Talent Club formed on Nov.2020 to attract more talents and further push the internationalization of Hangzhou.
