斜拉索的粘性剪切型阻尼器减振设计需要求解二阶微分方程组，计算工作量很大。
The differential equations with two degree have to be solved for designing viscous shear damper that is used to reduce the vibration of cables of cable stayed bridge.
用孤立不变集和孤立块的概念，给出了含一个参数的二阶常微分方程组的非驻定有界解分支点的存在性准则。
Using concepts of invariable set and isolated cube, we obtained existence for bifurcate points of bounded solutions of second order ordinary differential systems including a parameter.
本文主要运用锥不动点定理和格林函数研究二阶非线性常微分方程组正解的存在性。
In this paper, we study the existence of positive solutions to second - order nonlinear ordinary differential equations by using fixed point theorem in cones and Green's function.
由CO、co_2加氢合成甲醇的反应是一个复合反应体系，其催化剂颗粒内的浓度分布的表征方程为二阶常微分方程组。
The hydrogenation reaction of co and CO2 to synthesize methanol is a multiple reaction system. The distributions of concentrations are described by second order ordinary differential equations.
在圆柱状催化剂内的浓度分布的表征方程为二阶偏微分方程组。
The mathematical model describing the profiles of concentration in the cylindrical catalyst is the nonlinear partial differential equations of second order.
采用降阶和特征根 （欧拉 ）方法 ，给出了一类三维二阶常系数微分方程组的通解公式 ，并通过算例与拉氏变换法进行了比较。
With the variable replacement method, general solution formulae were given to the linear differential systems with complex constant coefficients and that with a class of complex variable coefficients.
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。
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。
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.
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