\input zb-basic \input zb-ioport \iteman{io-port 06090517} \itemau{Wang, Xiao; Yang, Xiyang; Dong, Keqiang} \itemti{A novel apportionment method based on seat balance.} \itemso{J. Beijing Norm. Univ., Nat. Sci. 47, No. 5, 452-456 (2011).} \itemab Summary: A novel method is proposed based on the concept of seat balance. This new method is found to satisfy three idealized principles. The method is compared with others by simulation, and is explained geometrically to show its harmony. \itemrv{~} \itemcc{} \itemut{seat apportionment model; seat balance; simulation} \itemli{} \end