Quadratic-gradient term 二次梯度项
A nonlinear dual-porosity model considering a quadratic gradient term is presented.
考虑了二次梯度项的非线性双重介质模型。
The models of the nonlinear radial flow for the infinite and finite reservoirs including a quadratic gradient term were presented.
考虑了二次梯度项影响的非线性径向流动问题的无限大地层和有界地层渗流模型。
According to the assumption of slightly compressible fluid, neglected the quadratic gradient term in nonlinear partial differential equation is usually lead to error.
在非线性偏微分方程中，根据弱可压缩液体的假设，忽略二次梯度项，在试井较长时间内将产生误差。
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