Direct digital controller (DDC) is the basic control unit of building automation system (bas).

直接数字控制器(DDC)是楼宇自动化系统(BAS)的基本控制单元。

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Intelligent building is the concernful research in nowadays and the control network is the basic of the building Automation System (bas) of the intelligent building.

智能建筑技术是当前热门研究课题，而智能建筑的控制网络是实现智能建筑楼宇自动化系统的基础。

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Intelligent Buildings are usually formed by the three basic elements: Building Automation System (bas), Communication Automation System (CAS) and Office Automation System (OAS).

智能楼宇通常由三大基本要素组成：楼宇自动化系统(BAS)、办公自动化系统(oas)、通信自动化系统(CAS)。

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Among the largest underlying components of XES, in trading today Basic Energy Services Inc ( NYSE: BAS) is off about 0.6%, Patterson-UTI Energy Inc. ( NASD: PTEN) is trading flat, and Hercules Offshore Inc ( NASD: HERO) is lower by about 1.7%.

FORBES: Notable ETF Outflow Detected - XES, BAS, PTEN, HERO