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.
一元化特征建模技术融特征设计和特征识别两者为一体，设计阶段的初始设计特征进入应用领域后，经过特征识别器形成领域专用特征。
Unified feature modelling technique is a hybrid of feature based design and feature recognition. In design stage, a part is described by initial features with four information models.
通过使用通用的三维曲面模型，可以对设计文件进行优化，使其准确用于概念设计、初始设计和详细设计阶段。
By using a common 3d surface model, design files can be optimized to accurately flow through concept, initial, and detailed design stages.
通过使用通用的三维曲面模型，可以对设计文件进行优化，使其准确用于概念设计、初始设计和详细设计阶段。
By using a common 3d surface model, design files can be optimized to accurately flow through concept, initial, and detailed design stages.
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