在长期操作中，使仪表的误差减至最小。
Minimize drift of the instrument during prolonged operation.
利用向量误差修正模型可以估计最小风险套期保值比，为投资者综合选择风险最小的套期保值策略提供了现实的、可操作的定量分析工具。
VECM model is helpful to estimate the hedge ratio with minimum risk which provides investors a practical and operable implement to choose hedging approaches.
因此，本发明可使图像质量改善工作自动化，从而使操作误差最小化。
Thus the image quality improvement is automatized therefore the operation error is minimized.
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