说明：  一种电梯系统的UML文档 1。简介 本文是该课程的博士项目报告分布式嵌入式系统在卡内基 梅隆大学。在整个过程中，一个分布式实时系统-电梯控制 系统指定，设计，建造，模拟。面向对象分析与设计 方法，在具体的统一建模语言（UML）是设计系统时使用。
(A UML documentation for an elevator system 1. Introduction This paper is a PhD project report for the course Distributed Embedded Systems at Carnegie Mellon University. Throughout this course, a distributed real-time system – an elevator control system– is specified, designed, built, and simulated. Object Oriented Analysis and Design methods, in specific the Unified Modeling Language (UML) are used when designing the system.)