This paper applies the base transformation invertor space and gives a new solution to the common item equation of finite series.
应用向量空间的基变换，给出了一种求有穷数列通项公式的新方法。
Item parceling, parcel, structural equation model.
项目组合项目小组结构方程模型。
The total variation constraint item is added to the wave equation inversion objective functional, to improve the stability and the resolution of inversion.
将波动方程反演的目标泛函加入全变差约束项，提高反演过程的稳定性和反演结果的分辨率。
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