序列检测器的设计与实现。功能要求：检测器有一个输入端X，被检测的信号为二进制序列串行输入，检测器有一个输出端Z，当二进制序列连续有四个1时，输出为1，其余情况均输出为0。如：X：1101111110110，Z：0000001110000。

-Design and Implementation of the sequence detector. Functional requirements: the detector has an input terminal X and the detected signal is a binary sequence of serial input, the detector has an output terminal Z, when four consecutive binary sequence 1:00, the output is 1, and the remaining cases are the output 0 . : X: 1101111110110, Z: 0000001110000.