上游充廷大￥ Seeing the Uniform-Pricing model from SHANGHAI IIAO TONG UNIVERSITY the perspective of the generator 4 For units that have reached its lower limit 元=0 ∴.p,+2-元=0，P,-元=-2 元>0. .p,>-元 2016/12/22For units that have reached its lower limit: 2016/12/22 9 Seeing the Uniform-Pricing model from the perspective of the generator 4 0 0, 0 i i i ii i i p p p                          