decision boundary meaning in Chinese

判别边界
判定边界

Many practical pattern recognition problems belong to this type , which means the decision boundaries in these problems are usually very complex and it is difficult and time consuming to build the corresponding classifiers
许多实际的模式识别问题都属于这类问题。通常这类问题所涉及的分类边界十分复杂，因此分类器的构造也相应十分困难，消耗时间也较长。
The decision boundaries in prpls are usually complex and sometimes it is difficult to get ideal result with only a single classifier . so it is necessary to build multi - stage classifiers , which gradually determines the class of a given sample with multi - steps
大规模模式识别问题分类边界较为复杂，用单一的分类器有时很难得到较好的结果，因此有必要建立多级分类器，以逐步确定给定样本的类别。
Thus the scale of the training data set is reduced greatly and the training speed of svm is improved enormously . because the decision boundary of svm is only determined by support vectors , the classification accuracy is almost preserved when other samples are omitted
在svm学习之前，首先剔除训练样本集中距离判决边界远的样本，选取靠近判决边界的样本构成有效训练样本集，然后用svm对有效样本集进行学习，这样大大降低了训练样本集的规模，提高了svm的学习速度。