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The equivalent model has good applicability for strong nonlinear Duffing systems.
该等效模型对强非线性杜芬系统具有良好的适用性.
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This paper deals with analytical approximate solutions to the Duffing - Harmonic oscillator by a new method.
用一种新方法研究达芬 - 谐波振子的解析逼近解.
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