Polynomial kernel function is applied to map face distribution of low dimension space to that of high dimension space, and decide which set that face to be recognized belongs to.

故本文运用多项式核函数将人脸分布的低维空间映射到高维空间，并在此空间判别“待识别人脸”是否属十某个人脸覆盖集合。

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She smiled and said, "Dad, there is a man's face on the other side of the map."

她笑着说：“爸爸，地图的另一面有一张男人的脸。”

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For years, people have warned that the smallest nations on the planet - island states that barely rise out of the ocean - face being wiped off the map by rising sea levels.

近几年来，人们警告说这个星球上最小的几个国家——仅在洋面上露个头的岛国——面临着被上升的海平面从地图上抹去的危险。

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Eventually, I found my arms reluctantly outstretched with a ludicrously large tourist map in front of my face.

BBC: A caffeinated return to Florence

Imagine what those same people might experience after having a 3D map float in front of their face while walking through New York City.

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An image of the Cameroon striker about to head a football, his face and neck superimposed on a map of Africa, will form the centrepiece of the publicity campaign for the tournament.

BBC: Eto'o face of 2010 World Cup