The transmission zeros(TZ) of Quasi-elliptic function filter could be placed in any position, so the attenuation out of band is controllable, then a high selection performance could get.
准椭圆函数滤波器的传输零点，可以位于阻带内的任意位置处，这能更加灵活地对滤波器的带外抑制度进行调节，其矩形系数可以做得很高。
The effectiveness ofthe method consists in:1. A suitable integration method for each type of problem, 2. A flexible hybrid algorithm for searching the zeros of the function;
其有效性基于：1）根据所解题目选择适当的积分方法；2）引进一种灵活的混合式零点寻找程序；
The effectiveness ofthe method consists in:1. A suitable integration method for each type of problem, 2. A flexible hybrid algorithm for searching the zeros of the function;
其有效性基于：1）根据所解题目选择适当的积分方法；2）引进一种灵活的混合式零点寻找程序；
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