• 溶液中的富集聚合物分子带电基团附近形成浓度梯度分布

    Salts are enriched around electriferous groups of polymer molecules in solution, which formed a salt concentration gradient.

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  • 发现正则动量空间梯度正比

    It is found that the canonical momentum is directly proportional to the gradient of space phase.

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  • 采用梯度磁选可将铁锂云母尾矿有效分离

    Zinnwaldite can be separated effectively by the high gradient magnetic separation from the tailing.

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  • 那么函数梯度什么

    Well, so, what's the gradient of this function?

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  • 问题不是所有向量都是梯度

    The problem is not every vector field is a gradient.

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  • 梯度散度完全不同东西

    OK, so divergence and gradients are completely different things.

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  • ▽表示,就是梯度符号

    You use this downward pointing triangle as the notation for the gradient.

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  • 那么应该就是一个梯度

    Now it should be a gradient field.

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  • 就是健康方面社会梯度

    This is the social gradient in health.

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  • 个例子,磁场不是梯度

    For example, magnetic fields certainly are not gradients.

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  • 为什么要说F一个梯度

    F is a gradient field. Why?

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  • 如果一个梯度得到这个

    We have said if we have a gradient field then we have this.

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  • 一个梯度全填充静态图像

    This is a static image with all the gradients and fills.

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  • 现在我们看看梯度第一性质

    But, so here's the first cool property of the gradient.

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  • 梯度向量应该垂直于等值线。

    The gradient vector would be going perpendicular to the level.

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  • 怎样确定一个是不是梯度

    Yes? How do you determine whether something is a gradient or not?

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  • 现在梯度向量什么呢?

    Now, what's the gradient vector?

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  • 同样地梯度也是把偏导数糅合到一起

    Well, the gradient is also a way to package partials together.

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  • 我们已经知道梯度垂直于等值面的

    We have seen that the gradient is perpendicular to the level surface.

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  • 所以梯度向量垂直的。

    So, the gradient is perpendicular.

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  • 方法应该计算梯度

    So, the way to do it is that we compute the gradient.

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  • 这个函数梯度什么

    What is the gradient of this function?

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  • 请讲?,不是梯度

    Yes? Oh, not the gradient.

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  • 方法是使用梯度因子,很快的得到了结果

    This one goes right away, by using the gradient factor.

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  • 因此不是一个梯度

    So, indeed, this is not a gradient field.

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  • 很多向量不是梯度

    A lot of vector fields are not gradients.

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  • 怎样知道梯度方向

    Yes? How do I know the direction of a gradient?

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  • 图形工具栏现在使用梯度背景改进表现

    The graphics and toolbars now use gradient backgrounds for improved appearance.

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  • 作出一个函数梯度

    Well, you take the gradient of a function.

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  • 向量就是梯度向量。

    The normal vector will just be the gradient.

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