采用ANSYS软件对脉冲发动机复合壳体进行了优化设计研究。
Optimum design of the composite shell of pulse motor has been presented using ANSYS soft ware.
FIR滤波器及两通道滤波器组的广泛应用，使其优化设计研究备受关注。
FIR filter and two-channel filter Banks are widely used and their optimisation design has received substantial attention recently.
最后，本文针对分布信息服务系统的安全服务可扩展性进行优化设计研究。
At the end, the paper studies expansibility of the distributed information service system.
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