说明：  嵌入式操作系统是嵌入式系统应用的核心软件。本文通过对两种典型的开源嵌入式操作系统的对比， 分析和总结嵌入式操作系统应用中的若干问题， 归纳嵌入式操作系统的选型依据.
(Embedded operating system for embedded system is the core software. Based on two typical embedded operating system revenue contrast, Analysis and Lessons Embedded operating system application of a number of issues, summarized in the embedded operating system based on selection.)