Hide the edges smoothly using a gradient mask. Pick the gradient Tool, create the below gradient in the Options Panel.

使用渐变遮罩使边缘平稳地消失。选择渐变工具，在选项面板中创建下面的渐变。

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First, a study of a sliding mode controller under on off training is made and then the on line learning algorithm using a gradient decent method is designed.

首先研究了离线训练的滑模控制器，然后，给出了利用梯度下降法的在线训练方法。

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For this effect, we will be using a gradient fill layer. Choose layer New fill layer gradient. Set the gradient as a white to transparent gradient as shown below.

为了这个效果，我们要用渐变填充图层：选择图层-新填充图层-渐变，设置由白到透明的渐变效果，如下图所示。

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Mr. Fischer has painted the surface with a faded pale blue hue, a gradient of color he distilled from a landscape photograph using Photoshop, a computer program he employs in much of his work.

WSJ: Urs Fischer's Beds & Problem Paintings Show in Beverly Hills