其中硬件电路包括键控制模块、显示模块、输入信号整形模块以及单片机和CPLD主控模块。
Hardware circuit includes key control module, display module, plastic module of input signal, single chip computer control module and CPLD main control module.
本文简要论述了时程分析中地震波输入的一些关键控制因素，为土木工程设计人员提供参考。
The key dominant facts of seismic wave input of time history analysis are discussed briefly in this paper, which are shown as reference for civil engineering designers.
四相相移调制是利用载波的四种不同相位差来表征输入的数字信息，是四进制移相键控。
Quadrature phase shift carrier modulation is used to represent the four different phase inputs of digital information, is quaternary phase shift keying.
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