A model of thermal field of casting is developed by using direct difference (outside node) method.

本文以外节点直接差分法，建立了铸件凝固温度场的数值模拟模型。

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The numerical results show that the direct difference method can effectively realize the denoising method model based on the TV model, and its effect is excellent.

结果表明，差分法能有效地快速实现基于TV模型的去噪方法，其去噪效果良好。

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The numerical results show that the direct difference method can effectively realize the denoising method model based on the TV model, and its effect is excellent.

结果表明，差分法能有效地快速实现基于TV模型的去噪方法，其去噪效果良好。

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