But design only considered the range characteristics, didn't consider phase characteristic, the design is a certain general filter nonlinear phase characteristic.
但设计中只考虑了幅度特性，没考虑相位特性，所设计的滤波器一般是某种确定的非线性相位特性。
IIR the design of the digital filter method is to use the filter mature theory and simulation design charts for design, so keep some classic simulation filter excellent range characteristics.
IIR数字滤波器的设计方法是利用模拟滤波器成熟的理论及设计图表进行设计的，因而保留了一些经典模拟滤波器优良的幅度特性。
It sets the subject, object, range, characteristics, and principles of urban management.
确定了城市经营的主体、客体、范围、特征、原则等。
It sets the subject, object, range, characteristics, and principles of urban management.
确定了城市经营的主体、客体、范围、特征、原则等。
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