Based on the study of melting behavior of thermoplastic polymers tested in the cone calorimeter, a differential numerical model for one-dimensional unsteady burning of polymers was put forward.
By using fixed point index theory in a cone, we study the existence of positive solutions of boundary value problems for systems of nonlinear second order singular differential equations.
使用锥上拓扑度理论，研究二阶非线性奇异微分方程组两点边值问题正解的存在性。
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By using fixed point theorem in cone, the authors discuss the existence of positive solutions of fourth order two-point ordinary differential equations.