parametric combination meaning in English

参数组合

Afterwards , a duffing system with delayed displacement feedback is studied by the method of multiple scales and other numerical methods . the uniform formulas for computing the critical values of time delay are given and the global diagrams of bifurcation for the periodic solutions with respect to the time delay are obtained under different parametric combinations . it is shown that the hopf bifurcation and the saddle - node bifurcation are the only two types of bifurcation observed in such a system
接下来用多尺度法及数值方法研究了一具有时滞位移反馈的duffing系统的动力学，得到了不同参数下系统平衡点发生稳定性切换时的临界时滞计算公式及关于时滞的大范围hopf分叉图，并发现saddle - node分叉及hopf分叉是系统出现周期运动的两个主要的来源。