当逆时外推至最小成像时间时，就能得到整个剖面的偏移结果。
The complete migration of a seismic section is achieved when reverse-time extrapolation reaches the minimum image time.
积分方程法的计算区域只是二维电导率异常剖面而不是整个剖面，可以大大提高计算精度。
The computational region of integral equation method is only the 2D conductivity abnormal section not the whole section, and the computational accuracy is greatly enhanced.
施肥频率对根密度的影响主要是引起各土层根密度大小的变化，运行方式则对各土层根长占整个剖面根长总和的比例产生影响。
Root length density varied with fertigation frequencies, and the ratio of root length for different soil layers to the total root length in the profile varied with fertigation strategies.
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