We'll run into that problem time and again . 這個問題我們還會時不時地碰到。
One is multi - dimension maximum sum of relative membership degree ; the other is staged multi - dimensional fuzzy optimization method . the first method is suitable for the static program that time is not involved , and the second method can be used to solve any multistage problem , especially for those problems time is involved , in the end , these methods are explained in detail one by one 其中,多維多目標決策序列相對優屬度總和最大法適于解決不涉及時間維的“靜態”多階段優化問題,而多維多目標階段模糊優選動態規劃方法不僅適用于“靜態”問題,而且適用于“動態”的任一階段或任一層次的優化問題。
In this paper , a crank - nicolson mixed element method , a nonlinear galerkin mixed element method for the non stationary conduction - convection problems time second order accuracy fully discrete formats and a two - level mixed element method with backtracing for the stationary conduction - convection problems are presented and analyed , respectively , an error analysis are provided for the crank - nicolson method of time discretization applied to spatially discrete galerkin mixed element approximations of the nonstationary conduction - convection problems 本文分別給出了非定常的熱傳導-對流問題的crank - nicolson混合元法時間二階精度全離散格式,非線性galerkin混合元法時間二階精度全離散格式以及定常的熱傳導-對流問題回溯二重水平法。討論了時間上的crank - nicolson離散方法應用于非定常的熱傳導-對流問題的空間離散的galerkin混合元近似。
Under the assumptions of non - convexity and non - degeneration , it is proved that the solutions of the initial - boundary problem to this viscoelastic model tend towards the travelling wave solution of the corresponding cauchy problem time - asymptotically for zero boundary speed and small initial perturbation by a weighted energy method 對粘彈性模型,用權能量方法證明了在非凸非退化的情形下,當邊界速度為0 ,初始值具有小擾動時,具初邊值問題的解收斂于相應的柯西問題的行波解。