There is absolutely no general public Heart in the city, there is a monotonous constructing, undeveloped microdistricts and also the priority of the event of automobile infrastructure. P R = V two × I = V R R + R C × V R + R C = R R + R C × V two R + R C = R R + R C P V displaystyle P_ R =V_ two moments I=V frac R R+R_ C instances frac V R+R_