多项式逼近remes算法
http://wenku.baidu.com/link?url=gpaBIucx0ov0ez3QHrO4FooBtNz2i80s4LKsh-LV3NnPYNjTUu7e1V7bT_jMHwOUZk4XY7zhgamGjy7p7SL1fPJYomY91W38IyBW9hALx_a
http://wenku.baidu.com/link?url=gpaBIucx0ov0ez3QHrO4FooBtNz2i80s4LKsh-LV3NnPYNjTUu7e1V7bT_jMHwOUZk4XY7zhgamGjy7p7SL1fPJYomY91W38IyBW9hALx_a