Plans to upgrade air-traffic-control technology to a modern satellite-guided system have faced repeated delays.

升级空中交通管理技术为现代卫星导航系统的方案一直拖延着。

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The company has a sound processing equipment, advanced technology and equipment and improve the quality control system.

公司拥有完善的加工设备，先进的工艺装备和健全的质量控制体系。

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The system can use computer technology to implement PID control with good applicability and flexibility, which can adjust PID parameters according to the system performance command.

系统采用计算机技术实现PID控制，可以根据系统性能指标调整PID参数，具有良好的适用性和灵活性。

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What the NTSB uncovers regarding the FAA's safety certification program could have important implications for the agency's ability to handle other technology challenges, including the transition to a new air traffic control system and the introduction of unmanned aircraft into the national airspace, said Jim Hall, a former safety board chairman.

NPR: NTSB Probes Safety Testing Of Boeing 787 Batteries

The real problem is an antiquated air-traffic control system "that is essentially based on World War II-era technology, " says Victoria Day, a spokeswoman with the Air Transport Association, the industry's lobby group.

NPR: Attention, Airlines: This Is Your Passenger Speaking

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ENGADGET: Panasonic's Lumix lineup grows: DMC-G5 Micro Four Thirds, DMC-FZ200 superzoom and DMC-LX7 hands-on and sample shots