对具有密度依赖生育脉冲的模型，运用频闪映射，结合分支理论和数值分析，得到了正平衡态的存在性、稳定性；
For the model with time-dependent birth pulses, using the stroboscopic map, the theory on bifurcation and numerical analysis, the existence and stability of the positive equilibrium are obtained.
积分的数值计算是数值分析的一个重要分支。
The numerical calculation of integration is an important branch of numerical analysis.
本文基于一维非稳态多分支非定常流，建立了相应的数学模型，采用有限容积法理论对方程进行数值离散分析。
The thesis established the flow model based on one-dimensional, unsteady, compressible, Navier-Stokes equations, and discrete the governing equations using a finite-volume formulation.
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