Under this premise, prototype system of process planning facing virtual assembly is tapped, and the demands of function, performance, information of the system are analyzed in detail.

以此为前提，开发了面向虚拟装配的工艺规划原型系统，对系统的功能需求、性能需求和信息需求进行了详细分析。

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A closed loop system with information feedback consisted of production planning and process operation of unit was optimized and integrated as two ranks in petrochemical industry.

将石化企业的生产计划与装置的操作工艺作为两个等级进行优化集成，从而构成了一个带有信息反馈通道的闭环系统。

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The location, goal and foundation of framework design of highway advanced traveler information system (ATIS) in the whole planning process are discussed.

首先探讨了公路AT IS架构设计在整个规划流程中的定位、架构设计的目的、实施工作基础等问题。

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