external synchronization 中文意思是什麼

external synchronization 解釋
外同步
  • external : adj 1 外部的，外面的；【哲學】外界的，客觀的，物質的。2 表面上的 （opp intrinsic）; 膚淺的，淺薄...
  • synchronization : n. 同時；同時性；【物理學】同步，同期；【電影】同期[步]錄音，配音譯制。
  1. The theoretic basis and the dat agram format of the newly propounded rts method are presented. finally, in the protocol stack of ip over ethernet, after the analysis of plesiochronization method and external clock method, a new synchronization method of absolute time stamp ( ats ) method is put forward, and detailed discussion is presented in this thesis

    針對物理層不能提供同步的情況（如ipoverethernet ） ，本文在分析基於外部同步信息的準同步法和外同步法以及基於業務碼流的自適應時鐘法之後，提出了一種新的絕對時標法，並對該方法的實現進行了較為詳細的研究。
  2. Chongqing expressway networking toll data communication network cotains 2 - ring and 8 - ray network structure based on expressway physical structure, setting up a trasmission trunk layer of sdh stm - 4 ( can be up - graded to stm - 16 ), and channel protection business entry layer consisting of sdh onu / olt stm - 1 ( can be up - graded to stm - 4 ). data exchange layer, through ip route exchange network above sdh network, forms 3 - level computer network structure of account settlement center - road section management company - toll station. to ensure obtaining original and reliable toll data from communication network, 2m circuitous chain is established between each toll station, accountsettlement center and road section management company, and also pstn dialing backup chain is set up between toll station and account settlement center. in order to maintain clock synchronization of the whole communication network, a proposal of sub - stage clock sychrononization signal network for differet network construction scale has been put forward in this design. in view of sensitivity and importance of toll data, this design particularly gives considerations of network safety and information safety for external and internel of network. therefore, communication safety, smoothness and reliability of networking toll system can be able to maintained in many ways

    重慶高速公路聯網收費數據通信網的結構是根據高速公路的物理結構構築了2環8射的網狀結構，建立了以sdhstm - 4 （可升級到stm - 16 ）的傳輸主幹層，以sdhonu / oltstm - 1 （可升級到stm - 4 ）組成的通道保護業務接入層。數據的交換層是在sdh網之上的ip路由交換網，形成了結算中心-路段管理公司-收費站之間的3級計算機網路結構。為從通信網路上保證收費數據的原始性和可靠性，每個收費站和結算中心、路段管理公司之間建立了2m迂迴鏈路，同時在收費站和結算中心之間建立了pstn的撥號備份鏈路。
  3. Qe1 achieve the whole synchronization by software and hardware. during the course of the initialization of the qe1 system, the chip pm4354 can accomplish the task of synchronization of bit, frame and multiframe after the chip initialization by the software. after pm4354 accomplishes the bit synchronization, qel will read the status registers of the pm4354 to get the status of each el circuit and choose recovered clock of the specified the el circuit as the external timing source of the whole htc - 5200an equipment

    Qe1系統在系統初始化時，通過軟體完成對硬體晶元pm4354的初始化工作后，便可利用該晶元完成4路e1的同步（位同步、幀同步和復幀同步） ；在pm4354完成時鐘提取的任務后， qe1通過不斷地訪問pm4354的狀態寄存器，獲得每路e1的狀態信息，在時鐘源的選擇原則下，選擇指定e1線路的恢復時鐘作為整個htc - 5200an節點設備的外部參考時鐘，從而解決了htc 5200an的中繼板卡由e1變為qe時所帶來的網同步時鐘源。
  4. Thereby, the choice of external timing source brought by the changing from the el to qel has been resolved. in the related chapters, the paper will explain the arithmetic of synchronization of bit, frame and multiframe in the pm4354 hardware and describe the software arithmetic and hardware sketch map of net synchronization

    本文在相關的章節中將詳細地給出pm4354硬體上完成位同步、幀同步和復幀同步的實現的演算法，並給出qe1在實現網同步過程中的軟體演算法和硬體電路示意圖以及在項目開發過程中，測試以上各種同步技術是否可行的技術方案。
  5. Can complete safely without additional synchronization, there are several common sequences of operations, such as iteration or put - if - absent, which still require external synchronization to avoid data races

    之類的簡單操作可以在不需要額外同步的情況下安全地完成，但還是有一些公用的操作序列，例如迭代或者put - if - absent （空則放入） ，需要外部的同步，以避免數據爭用。
  6. Trigger for external synchronization

    觸發器為外在同步
  7. Thread - hostile classes are those that cannot be rendered safe to use concurrently, regardless of what external synchronization is invoked

    線程對立類是那些不管是否調用了外部同步都不能在並發使用時安全地呈現的類。
  8. Central to this classification system is whether or not a caller can or must surround operations - or sequences of operations - with external synchronization

    這種分類系統的核心是調用者是否可以或者必須用外部同步包圍操作（或者一系列操作） 。
  9. By documenting that a class is thread - hostile, you inform users that they cannot use the class safely from multiple threads, even with external synchronization

    通過將類記錄為線程對立的，您就告知用戶即使使用了外部同步，他們也不能在多線程中安全地使用這個類。
  10. " conditionally thread - safe classes are those for which each individual operation may be thread - safe, but certain sequences of operations may require external synchronization

    有條件的線程安全類對于單獨的操作可以是線程安全的，但是某些操作序列可能需要外部同步。
  11. Thread - safe, you perform two valuable services : you inform maintainers of the class that they should not make modifications or extensions that compromise its thread safety, and you inform users of the class that it can be used without external synchronization

    線程安全的） ，您就提供了兩種有價值的服務：您告知類的維護者不要進行會影響其線程安全性的修改或者擴展，您還告知類的用戶使用它時可以不使用外部同步。
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