For communication between a WLAN station and an access point, frame acknowledgments decrease the bandwidth, as do the number of other stations using the same access point.
Based on the frame of safety evaluation system in foundation excavation of subway stations, it constructs the target system, and analyzes the appraisal factor.
依据地铁车站基坑工程安全评价体系的基本框架，构建地铁车站基坑工程的指标体系，并对评价因素进行分析。
3
Frame Synchronizer is one of the key devices in satellite ground receiving stations.