http://blog.csdn.net/itplus/article/details/11452743
http://blog.163.com/baolong_zhu/blog/static/196311091201421185531966/
http://zipperary.com/2014/01/12/covariance/
http://blog.codinglabs.org/articles/pca-tutorial.html
http://blog.csdn.net/itplus/article/details/11452743
http://blog.163.com/baolong_zhu/blog/static/196311091201421185531966/
http://zipperary.com/2014/01/12/covariance/
http://blog.codinglabs.org/articles/pca-tutorial.html
import requests data = { 'channel': '99x', 'called_number': '135xxx', 'tts_code': 'TTS_xx', 'tts_p