提出柔性换热网络在初始设计阶段，考虑网络投入运行后，实施清洗维护时序安排的理论框架。
A theory framework is presented for flexible heat exchanger network (HEN) synthesis considering the scheduling of cleaning maintenance at initial design stage.
初始计划通常包括许多设计阶段，在这些阶段中我们要概述客户的解决方案。
The original plans usually included a number of design phases where we would outline the solution for the client.
因为这些项目将会有多个软件发布版本，所以初始的设计阶段包括了软件的整体设计。
Since these projects were going to have multiple releases of software, the initial design phase covered overall design for the software.
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