To evaluate the trail potential of converged heterogeneous network （CHN） market, the logistic method for adoption modeling of CHN is used. User growth ＆ penetration have been taken as two variants to find saturatio...To evaluate the trail potential of converged heterogeneous network （CHN） market, the logistic method for adoption modeling of CHN is used. User growth ＆ penetration have been taken as two variants to find saturation condition in market. Model is continuous in time but modifications are done for discrete recurrence equation, commonly known as logistic map. Dynamic and static phases are taken into consideration while penetration decay is not covered in this model.展开更多
This paper studies and predicts the number growth of China＇s mobile users by using the power-law regression. We find that the number growth of the mobile users follows a power law. Motivated by the data on the evolut...This paper studies and predicts the number growth of China＇s mobile users by using the power-law regression. We find that the number growth of the mobile users follows a power law. Motivated by the data on the evolution of the mobile users, we consider scenarios of self-organization of accelerating growth networks into scale-free structures and propose a directed network model, in which the nodes grow following a power-law acceleration. The expressions for the transient and the stationary average degree distributions are obtained by using the Poisson process. This result shows that the model generates appropriate power-law connectivity distributions. Therefore, we find a power-law acceleration invariance of the scale-free networks. The numerical simulations of the models agree with the analytical results well.展开更多
The influence of crystallographic orientation on the void growth in FCC crystals was numerically simulated with 3D crystal plasticity finite element by using a 3D unit cell including a spherical void,and the rate-depe...The influence of crystallographic orientation on the void growth in FCC crystals was numerically simulated with 3D crystal plasticity finite element by using a 3D unit cell including a spherical void,and the rate-dependent crystal plasticity theory was implemented as a user material subroutine.The results of the simulations show that crystallographic orientation has significant influence on the growth behavior of the void.Different active slip systems of the regions around the void cause the discontinuity in lattice rotation around the void,and the corner-like region is formed.In the case of the void located at grain boundary,large heterogeneous deformation occurs between the two grains,and the equivalent plastic deformation along grain boundary near the void in the case of θ=45°(θ is the angle between grain boundary direction and X-axis) is larger than the others.Large difference of orientation factor of the two grains leads to large equivalent plastic deformation along grain boundary,and the unit cell is more likely to fail by intergranular fracture.展开更多
基金Supported by the National Natural Science Foundation of China(60772066)
文摘To evaluate the trail potential of converged heterogeneous network （CHN） market, the logistic method for adoption modeling of CHN is used. User growth ＆ penetration have been taken as two variants to find saturation condition in market. Model is continuous in time but modifications are done for discrete recurrence equation, commonly known as logistic map. Dynamic and static phases are taken into consideration while penetration decay is not covered in this model.
基金supported by the National Natural Science Foundation of China(Grant No.70871082)the Shanghai Leading Academic Discipline Project,China(Grant No.S30504)
文摘This paper studies and predicts the number growth of China＇s mobile users by using the power-law regression. We find that the number growth of the mobile users follows a power law. Motivated by the data on the evolution of the mobile users, we consider scenarios of self-organization of accelerating growth networks into scale-free structures and propose a directed network model, in which the nodes grow following a power-law acceleration. The expressions for the transient and the stationary average degree distributions are obtained by using the Poisson process. This result shows that the model generates appropriate power-law connectivity distributions. Therefore, we find a power-law acceleration invariance of the scale-free networks. The numerical simulations of the models agree with the analytical results well.
基金Project(2005CB623706) supported by the Major State Basic Research Development Program of China
文摘The influence of crystallographic orientation on the void growth in FCC crystals was numerically simulated with 3D crystal plasticity finite element by using a 3D unit cell including a spherical void,and the rate-dependent crystal plasticity theory was implemented as a user material subroutine.The results of the simulations show that crystallographic orientation has significant influence on the growth behavior of the void.Different active slip systems of the regions around the void cause the discontinuity in lattice rotation around the void,and the corner-like region is formed.In the case of the void located at grain boundary,large heterogeneous deformation occurs between the two grains,and the equivalent plastic deformation along grain boundary near the void in the case of θ=45°(θ is the angle between grain boundary direction and X-axis) is larger than the others.Large difference of orientation factor of the two grains leads to large equivalent plastic deformation along grain boundary,and the unit cell is more likely to fail by intergranular fracture.
