As for the undivided linear sample space, the kernel function is needed to map onto another high dimension linear space. 对于线性不可分的样本空间，需要寻找核函数，将线性不可分的样本集映射到另一个高维线性空间。
Geological information at different depth was described by introducing a mixed window kernel function to SVM. 通过引入窗口核函数，准确地反映了不同深度的地质信息。
