检索工具类型一题录一例 FF 4. Duan, G, et al., Program for Control System Simulation. Technical report, PB94-218153 1993 2001.2.192001. 2. 19 检索工具类型－题录－例 例4. Duan, G., et al., Program for Control System Simulation. Technical Report, PB94-218153, 1993