... Trigonometric Functions 三角函数 Parametric Differentation 参数微分 Integration by Parts 部分积分法 ...
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对带色散项非线性控制方程进行了研究，用“参数微分法”，得到其近似解。
This paper studies nonlinear wave equation with dispersion items, reaching an approximate Solution in the method of Parameter differentiation.
对一类带耗散项非线性波动方程进行了研究，用“参数微分法”，得到其解析近似解。
This paper Studies nonlinear wave equation with dissipation items, reaching an approximate solution in the method of parameter differentiation.
为此，本文作者推导出了能精确描述变截面情况的分布参数张力微分方程。
The tension differential equation with distributed parameters which can accurately describe the tension at varied section was inferred.
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