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。
According to the assumption of slightly compressible fluid, neglected the quadratic gradient term in nonlinear partial differential equation is usually lead to error.
本文综合运用了一些金融研究方法，如偏微分方程以及二项式等方法对可转换债券的定价问题进行了深入的研究。
The pricing of convertible bonds is further studied in this paper by taking advantage of Modern Financial mathematics, Financial Engineering, Partial Differential Equations and Binomial Method.
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