Using mesoscale numerical model WRFV3.7,simulation tests of a low-vortex rainstorm were carried out in Langfang area,and simulation results of three boundary layer parameterization schemes(MYJ,YSU,ACM2)were contrasted...Using mesoscale numerical model WRFV3.7,simulation tests of a low-vortex rainstorm were carried out in Langfang area,and simulation results of three boundary layer parameterization schemes(MYJ,YSU,ACM2)were contrasted.The results showed that the rainstorm in Langfang area had better dynamic condition.By the influence of northeast cold vortex,cold vortex at high altitude cooperated with the surface wind speed convergence,which provided better dynamic condition for strong convective rainfall.Three boundary layer parameterization schemes all simulated surface wind speed convergence of rainstorm center.Simulation results of 24-h rainfall distribution showed that the simulation of YSU scheme was better than ACM2 and MYJ.The simulation results of flow field and temperature field also verified that YSU scheme was better than other schemes.展开更多
By studying developing status and trends of agricultural industrial park in Langfang, the paper will make an analysis of the present development and main factors which restrict the development of CI strategy in agricu...By studying developing status and trends of agricultural industrial park in Langfang, the paper will make an analysis of the present development and main factors which restrict the development of CI strategy in agricultural creative industrial park in Langfang city. The paper also tends to put forward the measures to speed up the CI strategy in Langfang city industrial park and to form a new pattern with local characteristics and advantages.展开更多
Langfang is located in the middle of Hebei province;it lies between the Bohai Sea to the east and the capital city of the country to the west,and lies between the Yan Mountain to the north and a large area of fertile ...Langfang is located in the middle of Hebei province;it lies between the Bohai Sea to the east and the capital city of the country to the west,and lies between the Yan Mountain to the north and a large area of fertile plain soil to the south.It is less than 50km from Langfang to Beijing and takes less than an hour to the sea.This piece of land,interdependent with Beijing-Tianjin,is like a bright pearl,proudly embedded in the Beijing-Tianjin corridor.展开更多
文摘Using mesoscale numerical model WRFV3.7,simulation tests of a low-vortex rainstorm were carried out in Langfang area,and simulation results of three boundary layer parameterization schemes(MYJ,YSU,ACM2)were contrasted.The results showed that the rainstorm in Langfang area had better dynamic condition.By the influence of northeast cold vortex,cold vortex at high altitude cooperated with the surface wind speed convergence,which provided better dynamic condition for strong convective rainfall.Three boundary layer parameterization schemes all simulated surface wind speed convergence of rainstorm center.Simulation results of 24-h rainfall distribution showed that the simulation of YSU scheme was better than ACM2 and MYJ.The simulation results of flow field and temperature field also verified that YSU scheme was better than other schemes.
文摘By studying developing status and trends of agricultural industrial park in Langfang, the paper will make an analysis of the present development and main factors which restrict the development of CI strategy in agricultural creative industrial park in Langfang city. The paper also tends to put forward the measures to speed up the CI strategy in Langfang city industrial park and to form a new pattern with local characteristics and advantages.
文摘Langfang is located in the middle of Hebei province;it lies between the Bohai Sea to the east and the capital city of the country to the west,and lies between the Yan Mountain to the north and a large area of fertile plain soil to the south.It is less than 50km from Langfang to Beijing and takes less than an hour to the sea.This piece of land,interdependent with Beijing-Tianjin,is like a bright pearl,proudly embedded in the Beijing-Tianjin corridor.
