Three-link reducers are widely used in petrochemical, mining and other fields for their high transmission ratio, high capacity and high transmission efficiency. Tooth racks are the key components of a three-link gearr...Three-link reducers are widely used in petrochemical, mining and other fields for their high transmission ratio, high capacity and high transmission efficiency. Tooth racks are the key components of a three-link gearreducer. In this paper, in order to obtain the fairly accurate link board stress distribution, we use the PRO/E software to establish the 3D models, carry out theoretical analysis of the link board overall stress and analyze the stress of the tooth rack with ANSYS software.展开更多
Electron momentum distributions for 4a1 orbitals of serial freon molecules CFaC1, CF2Cl2, and CFCl3 (CFxC14-x, x=1-3) have been reanalyzed due to the severe discrepancies between theory and experiment in low momentu...Electron momentum distributions for 4a1 orbitals of serial freon molecules CFaC1, CF2Cl2, and CFCl3 (CFxC14-x, x=1-3) have been reanalyzed due to the severe discrepancies between theory and experiment in low momentum region. The tentative calculations using equilibrium geometries of molecular ions have exhibited a great improvement in agreement with the experimental data, which suggests that the molecular geometry distortion may be responsible for the observed high intensities at p〈0.5 a.u.. Further analyses show that the severe discrepancies at low momentum region mainly arise from the influence of molecular geometry distortion on C-Cl bonding electron density distributions.展开更多
In this paper,we give an overview of representation theorems for various static risk measures:coherent or convex risk measures, risk measures with comonotonic subadditivity or convexity, law-invariant coherent or conv...In this paper,we give an overview of representation theorems for various static risk measures:coherent or convex risk measures, risk measures with comonotonic subadditivity or convexity, law-invariant coherent or convex risk measures, risk measures with comonotonic subadditivity or convexity and respecting stochastic orders.展开更多
文摘Three-link reducers are widely used in petrochemical, mining and other fields for their high transmission ratio, high capacity and high transmission efficiency. Tooth racks are the key components of a three-link gearreducer. In this paper, in order to obtain the fairly accurate link board stress distribution, we use the PRO/E software to establish the 3D models, carry out theoretical analysis of the link board overall stress and analyze the stress of the tooth rack with ANSYS software.
基金V. ACKNOWLEDGMENTS This work was supported by the National Natural Science Foundation of China (No.10734040) and the Chinese Academy of Science Knowledge Promotion Project (No.KJCXI-YW-N30). The authors also gratefully acknowledge Professor C. E. Brion from University of British Columbia (UBC) in Canada for supplying the HEMS and RESFOLD programs.
文摘Electron momentum distributions for 4a1 orbitals of serial freon molecules CFaC1, CF2Cl2, and CFCl3 (CFxC14-x, x=1-3) have been reanalyzed due to the severe discrepancies between theory and experiment in low momentum region. The tentative calculations using equilibrium geometries of molecular ions have exhibited a great improvement in agreement with the experimental data, which suggests that the molecular geometry distortion may be responsible for the observed high intensities at p〈0.5 a.u.. Further analyses show that the severe discrepancies at low momentum region mainly arise from the influence of molecular geometry distortion on C-Cl bonding electron density distributions.
基金supported by National Natural Science Foundation of China (Grant No.10571167)National Basic Research Program of China (973 Program) (Grant No.2007CB814902)Science Fund for Creative Research Groups (Grant No.10721101)
文摘In this paper,we give an overview of representation theorems for various static risk measures:coherent or convex risk measures, risk measures with comonotonic subadditivity or convexity, law-invariant coherent or convex risk measures, risk measures with comonotonic subadditivity or convexity and respecting stochastic orders.