alert frequency 中文意思是什麼
alert frequency
解釋
報警頻率-
Ofta has issued a notice earlier to the satellite master antenna television ( smatv ) licensees, class licensees of in - building telecommunications systems, operatorsowners of in - building coaxial cable distribution systems ( ibccds ) ( including communal aerial broadcast distribution ( cabd ) systems, closed circuit television ( cctv ) systems, cable television ( ctv ) systems ) to alert the residents that they might need to adjust their vcrs or other equipments to avoid using channel 35 and 37 as radio - frequency ( rf ) output channel for connection to the television sets
電訊管理局已就此事向本港衛星電視共用天線系統牌照持牌商、樓宇內置電訊系統類別牌照持牌商，以及大廈內同軸電纜系統營辦商擁有人（包括共用天線分佈系統、閉路電視系統、有線電視系統）發出指引，呼籲有關單位提醒其用戶如有需要可調整錄影機或其他器材，避免使用頻道35及37作為接駁電視機的訊號接收頻道。 -
To prevent people committing suicide by jumping off the bridge, the tsing ma management limited has stepped up surveillance such as asking their staff to stay more alert when monitoring the operation of the bridge through the closed circuit television and to increase the frequency of patrolling
青馬大橋並無行人設施，市民難以走近。為免有人跳橋自殺，青馬管理有限公司已加強監察，例如提醒員工在利用閉路電視監察大橋的運作時保持高度的警覺性，以及增加巡邏次數。 -
4. both cia and time - frequency analysis ( tfa ) are applied to the detection of the radar target in strong noise environment. these methods possess better detection ability than conventional constant false alert ratio ( cfar ) method
將復像分析應用於雷達目標的弱信號檢測，將常規的基於恆虛警檢測方法無法檢測到的目標利用復像分析方法檢測出來，在一定程度上提高了雷達的檢測能力。
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