This article discusses the application of relationship between definite integration and function.
主要讨论了定积分与函数的两种关系在积分论证问题的应用。
The definite integral can be calculated with the integration function in MATLAB or can be solved by using the Monte Carlo programming method.
该定积分可用MATLAB提供的积分函数计算，或者利用蒙特卡罗方法通过编程求解。
If probability density functions of stress and strength are definite, stress strength interference model can be used to calculate reliability using formulation or numerical value integration.
应力、强度概率密度函数确定可采用应力-强度干涉模型，用公式或数值积分求可靠度。
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