8HUANG De\|cai\+1,\ ZHAO Ke\|qin\+2,\ ZHANG Ping\+1 1.College of Information Engineering , Zhejiang University of Technology Hangzhou 310014, China 2.Zhejiang Gold Machine Works, Zhuji 311811, China.A New Network Planning Method Based on the Connection Number a+bi of SPA[J].Systems Science and Systems Engineering,2000,10(3):324-331.