在回归模型中,下列哪一项在权衡欠拟合( under-fitting )和过拟合( over-fitting )中影响最大? A. 多项式阶数 B. 更新权重 w 时,使用的是矩阵求逆还是梯度下降 C. 使用常数项 D.以上都对
A.
B.
C.
D.
D
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