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为建立更合理、更科学的目标光谱函数，而改进膜系的自动设计．在进行理想光谱曲线输入时，对光谱反射比或透射比要求不严格的波段只输入一个区间范围；对要求严格匹配的波段，按点输入准确值．同时，评价函数的构造根据波段要求的严格程度做不同的变形，采用改进以后的方法设计的膜系与原来的膜系相比，层数减少，设计时间缩短．采用模糊输入法，对评价函数的构造做相应的变形，可以改进膜系的自动设计．
In order to establish a more rational and scientific target spectral function, the automatic design of the membrane system is improved. In the ideal spectral curve input, the spectral reflectance or transmittance less stringent requirements of the band input only a range of range; for the strict matching of the band, press the point accurate value. At the same time, the structure of the evaluation function is different according to the strict requirements of the band. Compared with the original membrane system, the membrane system designed by the improved method reduces the number of layers and shortens the design time. Using fuzzy input method, the structure of evaluation function can be modified accordingly, which can improve the automatic design of membrane system.