This thesis adopts a gradient image registration method which is based on the Taylor theory. Since it can provide a good registration for big shifted image.

本文采用了基于梯度法的运动估计，因为它能很好地对大位移的图像进行精确的配准。

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The result shows that the change of gradient of kick-off pressure, the storage ratio and the ratio of formation coefficients have relatively big effect on the slug flow well test result.

结果表明：启动压力梯度、层间储容比、地层系数比的变化对段塞流试井解释结果有较大的影响。

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Modem large cargo planes have long wings, and their engines are barely above the ground. If the gradient is too big, the ground may scrape the engines and wings.

现代大型运输机机翼翼展长，发动机离地面较低，如果低高度坡度过大，可能擦翼尖或发动机。

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Pushed for time and strapped for cash, the engineers laid eight miles of track straight up Big Hill, at a gradient more than twice the safe maximum.

BBC: The wonders of Canada by rail

Increased evaporation from the exposed sea should also mean more snowfall to compensate for the ice cap's losses (though together with rapid erosion at the margins this could increase the gradient of the ice cap, making it less stable.) But this is small consolation for another big fear: rapid thawing of the Arctic permafrost.

ECONOMIST: The science