function [ V, maxe ] = espeed( E,Ep,stps,mu1, mu2 )
%UNTITLED1 Summary of this function goes here
%   Detailed explanation goes here
n1_=1/(70*exp(-Ep/E)+1);
n2_=n1_*70*exp(-Ep/E);
V=E.*(n1_*mu1+n2_*mu2);
maxe=0
