特别是在题库管理模块中对自动组卷功能常用的算法（包括随机选取法、回溯试探法和遗传算法）进行了比较。对于较流行的验证码技术也给出了具体实现。-particularly in the examination management module to automatically making up the algorithm commonly used functions (including random selection method, Retrospective testing and gen

基于EDA软件平台上，用硬件描述语言verilog设计完成分频器、计数器、串行移位输出器、伪码发生器、QPSK I/Q调制器、QPSK I/Q解调器，基于选项法中频调制器，再将各个模块综合起来组成一个完整系统；并用quartusII软件对其进行仿真验证。-EDA software platform based on the hardware descr iption language verilog design complete shift of the frequency divider,