When you select an HTML element, Expression Web also shows a small bubble with additional information, such as size, distance from the left, and distance from the top.
当你选择一个HTML的元素，Expression Web也会显示一个小的提示。比如大小，到左边的距离以及到顶端的距离。
To select the global best position for each particle and update the external archive, a new crowding distance measure is adopted to evaluate particles'density.
通过定义的新拥挤距离测度计算微粒的分布密度，完成微粒全局最优点的选择以及外部储备集的更新。
It applies WP translate to get energy from subspace and select the best WP bases with classification distance criterion. The energy has bigger distance coefficient in best WP bases is the feature.
该方法应用小波包变换提取信号各子空间的能量，以能量分类距离标准选取最佳小波包基，最佳小波包基上距离系数大的能量作为特征值。
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