自动化专业英语上课1.pptVIP

* * ventilate [ventileit] vt.使通风, 通风；公开; 公开讨论 refrigeration [r?fr?d??,re?t] 制冷;冷藏;冷冻 HVACR 暖通空调制冷 heating, ventilating, air conditioning and refrigeration Costs are coming down for a variety of reasons, including greater competition resulting from open protocols and the evolution of distributed systems, lower cost computing, and easier-to-use software configuration tools. protocol [pr??t?,k?:l] （数据传递的）协议 software configuration tools 软件组态工具 The key to realizing the potential for computerized control in buildings has been to reduce installed costs. Early EMCS were very centralized and had exceedingly high wiring and software programming costs. MEMS sensors are low cost when manufactured in large volumes, small and lightweight, and can have good accuracy and resistance to long term drift. The costs of field installation for monitoring and control systems are a major part of total system costs and are due to wiring of individual components, sensor installation, and software implementation. There are a variety of wireless approaches that could ultimately be widely applied for monitoring and control in buildings because of reduced installation costs.