We present Turing pattern selection in a reaction-diffusion epidemic model under zero-flux boundary conditions. The value of this study is twofold. First, it establishes the amplitude equations for the excited modes, ...We present Turing pattern selection in a reaction-diffusion epidemic model under zero-flux boundary conditions. The value of this study is twofold. First, it establishes the amplitude equations for the excited modes, which determines the stability of amplitudes towards uniform and inhomogeneous perturbations. Second, it illustrates all five categories of Turing patterns close to the onset of Turing bifurcation via numerical simulations which indicates that the model dynamics exhibits complex pattern replication： on increasing the control parameter v, the sequence ＂H0 hexagons → H0-hexagon-stripe mixtures →stripes → Hπ-hexagon-stripe mixtures → Hπ hexagons＂ is observed. This may enrich the pattern dynamics in a diffusive epidemic model.展开更多
A comparative study was made on the contraception efficacy and safety of the vaginal ring releasing 10mg/day Of progesterone in 160 cases and an intrauterine device,the cOPPer T 380A in 100 cases during lactation.It w...A comparative study was made on the contraception efficacy and safety of the vaginal ring releasing 10mg/day Of progesterone in 160 cases and an intrauterine device,the cOPPer T 380A in 100 cases during lactation.It was found that the contraceptive method is acceptable from 42 to 60 days postpartum.No pregnancy occurred in the copper T 380A IUD users during lactation.Those methods are worth to be recommended because of their contraceptive efficacy and no adverse effects on breastfeeding children.Prenatal care and Family Planning Programe are administered together to raise lactation performance rate,and to decrease induced abortion rate,the health of mothers and children were protected.展开更多
基金Project supported by the Natural Science Foundation of Zhejiang Province of China (Grant No.Y7080041)
文摘We present Turing pattern selection in a reaction-diffusion epidemic model under zero-flux boundary conditions. The value of this study is twofold. First, it establishes the amplitude equations for the excited modes, which determines the stability of amplitudes towards uniform and inhomogeneous perturbations. Second, it illustrates all five categories of Turing patterns close to the onset of Turing bifurcation via numerical simulations which indicates that the model dynamics exhibits complex pattern replication： on increasing the control parameter v, the sequence ＂H0 hexagons → H0-hexagon-stripe mixtures →stripes → Hπ-hexagon-stripe mixtures → Hπ hexagons＂ is observed. This may enrich the pattern dynamics in a diffusive epidemic model.
文摘A comparative study was made on the contraception efficacy and safety of the vaginal ring releasing 10mg/day Of progesterone in 160 cases and an intrauterine device,the cOPPer T 380A in 100 cases during lactation.It was found that the contraceptive method is acceptable from 42 to 60 days postpartum.No pregnancy occurred in the copper T 380A IUD users during lactation.Those methods are worth to be recommended because of their contraceptive efficacy and no adverse effects on breastfeeding children.Prenatal care and Family Planning Programe are administered together to raise lactation performance rate,and to decrease induced abortion rate,the health of mothers and children were protected.
