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block signal 【交通】閉塞信號。

This thesis studies the law of affecting de - noise result and the selection of the threshold and the wavelet function , the combination of wavelet and fft in the fault diagnosis of turbine - generator sets : by the de - noise anslysis of blocks and sin signals , concludes : to blocks signals , usually adopts soft threshold ; the law of affecting de - noise result is when use wavelet auto - de - noise , with the increasing of decomposed level , the de - noise result becomes worse while the level blow the 3 , when the level above 3 and when uses wavelet packet , it is the other way round ; the best de - noise methods of the signal is that uses “ dbl “ wavelet function , three level , soft and “ rigrsure “ threshold 本文研究了分解層數對消噪結果影響的規律和閾值、小波函數的選取,結合小波分析與fft分析診斷汽輪發電機組的故障。通過對brocks和sin兩信號的分析,得出:對blocks信號進行分析一般采用軟閾值;分解層數對消噪結果影響的規律為用小波自動降噪在分解層數小于3時,隨著分解層數的增加,消噪結果變好,反之,則變差,用小波包降噪時隨著分解層數的增加,消噪效果變好;適宜選用dbl小波軟rigrsure閾值自動消噪。

block stream

It also calculates theoretically the minimal time interval between two trains in quasi - moving - block signaling system and recommends approximate values for the length of coded digit track circuit . the rapid development of urban rail transit demands a deep understanding on the features of track circuit 在此基礎上,針對當前應用廣泛的基于數字軌道電路的準移動閉塞atc系統進行了重點分析,詳細討論了數字軌道電路的原理、準移動閉塞系統的列控方式等內容,并對準移動閉塞下的最小列車追蹤間隔時間進行了理論計算和分析,給出了數字軌道電路長度的推薦值。

This thesis studies the law of affecting de - noise result and the selection of the threshold and the wavelet function , the combination of wavelet and fft in the fault diagnosis of turbine - generator sets : by the de - noise anslysis of blocks and sin signals , concludes : to blocks signals , usually adopts soft threshold ; the law of affecting de - noise result is when use wavelet auto - de - noise , with the increasing of decomposed level , the de - noise result becomes worse while the level blow the 3 , when the level above 3 and when uses wavelet packet , it is the other way round ; the best de - noise methods of the signal is that uses “ dbl “ wavelet function , three level , soft and “ rigrsure “ threshold 本文研究了分解層數對消噪結果影響的規律和閾值、小波函數的選取,結合小波分析與fft分析診斷汽輪發電機組的故障。通過對brocks和sin兩信號的分析,得出:對blocks信號進行分析一般采用軟閾值;分解層數對消噪結果影響的規律為用小波自動降噪在分解層數小于3時,隨著分解層數的增加,消噪結果變好,反之,則變差,用小波包降噪時隨著分解層數的增加,消噪效果變好;適宜選用dbl小波軟rigrsure閾值自動消噪。

This paper describes the components and structure of advanced signaling system : automatic train control system ( atc ) , analyzes the function and classification of its three subsystems : ats , atp and ato , with emphasis on currently widely adopted atc system - quasi - moving - block signaling system , which works on coded digit track circuit , and discusses the operating principles of coded digit track circuit and the features of train control of quasi - moving - block signaling system 信號系統是確保城市軌道交通列車運行安全及提高運營效率的關鍵設備。本文詳細討論了應用于城市軌道交通的先進的信號系統? ?列車運行自動控制系統( atc )的組成和結構,對其三個子系統:列車自動監控系統ats 、列車自動保護系統atp 、列車自動運行系統ato的功能和分類進行了詳細分析和比較。

In a start - stop teletypewriter system , the significant condition of the signal element that immediately precedes a character signal or block signal and prepares the receiving equipment for the reception of the code elements 在啟動一個電傳打字機系統中,迅速領先字符信號或閉塞信號,并且準備好接收設備為接收代碼元件的信號元件的有效狀態。

Then it discusses the signaling system in guangzhou metro line no . 4 and points out the necessity and possibility of adopting the moving - block signaling technology for its linear motor carrying system 在此基礎上,對廣州地鐵四號線信號系統的選擇進行了探討,指出了廣州地鐵四號線直線電機運載系統采用移動閉塞技術的必要性和可行性。

Or any other function that returns information in the same object , or if it always blocks signals around each use , you re safe 或者任何其他在同一對象中返回信息的函數,或者如果它每次使用時都會阻塞信號,那么就是安全的。

The paper examines the principles of communication based moving - block signaling system , its typical structure and its practical methods 本文討論了基于通信的移動閉塞信號系統的原理、典型結構和實現方式。

Kernel signal handling is rather elaborate , because the posix semantics allows processes to temporarily block signals 內核信號處理是很復雜的過程,因為posix信號語義允許進程臨時禁止某些信號的接收。

Moving - block signaling system indicates the development tendency of urban rail transit signaling system 移動閉塞是城市軌道交通信號系統的發展方向。

Block signal box 閉塞信號樓

Block signal rule 閉塞信號規則