urban runoff

Ethylene glycol monoethyl ether acetate(EGEEA) was synthesized by the esterification reaction of acetic acid with ethylene glycol monoethyl ether in the novel catalyst of polymer compouned which is FeCl_3-AlCl_3-UR.

　以乙二醇单乙醚和冰乙酸为原料,在新型高分子复合催化剂FeCl3-AlCl3-UR的催化下,合成了乙二醇单乙醚醋酸酯。

We prove that,under UR condition of polynomial map in Q-jet J~Q(F),DF(O)x is the smooth normal form of F (x) near its hyperbolic fixed point.

通过使用正规形方法证明了若局部微分同胚F(x)的Q射式中的p次多项式映射代表满足UR条件,则在双曲不动点O附近光滑共轭等价于映射DF(O)x,也就是说,DF(O)x是在双曲不动点处的光滑正规形。