运用系统理论观点，从数学层面上分析自然灾害系统的链式关系结构，建立自然灾害链式效应数学关系模型。
Using systems theory, the structural relation of chain effects on natural disaster is mathematically analyzed; and a mathematical model is deduced.
运用系统理论观点，从数学层面上分析自然灾害系统的链式关系结构，建立自然灾害链式效应数学关系模型。
Using systems theory, the structural relation of chain effects on natural disaster is mathematically analyzed; and a mathematical model is deduced.
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