XML文档的解析包括路劲，节点，及树的特征向量的提取

向量量化作業可快速加密,並可以讓使用者快速解密-Vector quantization operations can be quickly encrypted and allows users to quickly decrypt

带双步的QR分解方法求所有特征值，以及反幂法求解对应特征向量-two-steps-qr-descomposure to solve all eigenvalues of a matrix. and antipower method to solve a engenvector correspongding to the eigenvalue