为了处理超临界流和有冲波情况，我们在方程中引入人工粘性项，以消除解中可能出现的不连续性。

An artificial viscous term is introduced in the equation to treat the supercritical flow with embeded shock waves and to eliminate the discontinuous solution.

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实验证明，改进后的枝切线长度和不连续长度显著减少，解缠结果的精度明显提高。

Experiments prove that the length of branch-cuts and magnitude of discontinuities are remarkably reduced and unwrapped results are evidently improved with branch-cuts optimized.

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