sequencebalance

代码说明：

  该函数将检测输入的序列是否是平衡的序列，以加以挑选，例如在扩频通信中的地址码就需要具有良好平衡性的gold序列(The function will detect whether the input sequence is a balanced sequence, in order to be selected, for example, in Spread Spectrum Communication address code on the need to have a good balance of the gold sequence)