传统的os 比如ucos 这种维护了一个头为单指针的双向链表，这样导致链表插入到尾部的速度很慢，得不偿失，所以raw os 采用了头为双指针的双向链表，插入速度更快。-Traditional OS such as UCOS the maintain a head for a single needle two-way linked list. As a result, the linked list insertion to the tail of the speed is very slow,

针对数字基带传输系统中HDB3信号的特点，采用基于FPGA的Verilog HDL语言，实现HDB3数字基带信号的编码器设计,共有插V、插B、单双极性变换模块，最终能在FPGA实现。-For digital baseband transmission system HDB3 signal characteristics, based on FPGA Verilog HDL language, designed to achieve HDB3 encoder digital baseband si