Secondly, it analyzes the needs of information integration of the command information system and creates a data source associated model and command task information need model using UML tools.
其次，对指挥信息系统信息集成进行了需求分析，利用UML工具建立了数据源关联模型和指挥任务信息需求模型；
According to the operation-principle of central air-conditioning system, the author built a market's "cooling-load need model" and put forward energy-saving design and operation-control strategy.
根据大型商场中央空调系统运行原理，建立了商场“冷负荷需求模型”，提出了节能设计与节能运行控制策略。
According to the operation-principle of central air-conditioning system, the author built a market's "cooling-load need model" and put forward energy-saving design and operation-control strategy.
根据大型商场中央空调系统运行原理，建立了商场“冷负荷需求模型”，提出了节能设计与节能运行控制策略。
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