sfn 中文意思是什麼

sfn 解釋
單頻網數碼頻道
  1. The international affairs committee ( sfn and us nas ) supports neuroscientists worldwide through professional training and international collaboration

    國際事務委員會：藉由專業訓練與跨國合作支持全球神經科學家。
  2. The optode shows a satisfactory linear response for the dissolved oxygen in water ( r = 0. 9992, n = 6 ) the relative standard deviations were 1. 7 % 5. 0 %, the detection limit was 0. 03 11 g / ml ( sfn = 3 ). the exposure time and recovery time of the optode membrane are 30s and 90s respectively. the reversibility of the fluorescence signal was evaluated by alternate measurements in oxygen saturated water and nitrogen - purged water

    7 5刀之間，最低檢出限為0刀3pg il ；考察了標準海水中主要離子濃度放大1倍后的樣品溶液、鹽度在0 49范圍內的人工海水，以及ph在l 13范圍內的緩沖溶液等干擾因素的對膜響應的影響，結果無顯著性干擾；將本法與國標法相比較，驗證了方法的可用性，最終用於在線監測海水中的溶解氧。
  3. As dab system serves an area by using one single frequency network ( sfn ), more radio services are available alongside with data and pictures transmissions. this significantly expands the number of channels and allows for a more efficient use of the available spectrum as well as more interactions with audience

    由於數碼聲音廣播支援單頻網路的運作，即全港均用單一頻率發射及接收，可以大幅節省頻譜，從而提供更多電臺服務，以及傳輸數據和影像等；由於更有效運用廣播頻譜，電臺頻道數目將可倍增，而服務也可多元化。
  4. Recover the spectrums first. when analogue transmission had been switched off, then deploy more frequencies for additional multiplexes of sfn or mfn and allowing more capacity for programme providers and additional services

    當模擬輸送終止后，騰空出的頻譜可為節目供應商及附加服務供應商提供更多頻譜容量，以推出額外的單頻網路或多頻網路數碼頻道。
  5. Deploy only sfn multiplexes in the initial stage. the government should

    在起行的階段，政府應
  6. Sfn single frequency network

    單頻網同步網
  7. A design of system level is presented in this thesis according to the function of the sfn adapter and sync system

    根據dvb - t單頻網適配器實現的功能，本文提出了它的系統設計框圖，將其劃分為若干模塊。
  8. In this paper, how to realize multiplexing, linking internet into dvb network and synchronizing sfn using a package processor in dvb head - end is studied

    本論文研究在dvb前端通過一個多功能的包處理器來實現復用、 internet接入dvb網路以及單頻網同步的功能。
  9. Some excellent methods for optimizing the coverage of sfn are reviewed in this paper. a method for constructing single frequency network with low - power transmitters is proposed

    摘要介紹了國際上流行的一些單頻網覆蓋優化方法，並提出了採用對人體輻射影響較小的小功率發射機進行信號覆蓋的方案。
  10. The design in this thesis doesn ’ t aim to realize all the functions of sfn adapter and sync system but to focus on the core function to validate the feasibility

    本文中的設計並不強調面面俱到，而是緊緊圍繞單頻網適配器和同步系統實現時間同步的核心功能進行，目的在於對基於fpga的設計方案的可行性進行驗證。
  11. If government insist on going ahead with deploying all sfns and mfns as planned and at the same time, the government should give priority to atv and tvb, the existing terrestrial broadcasters, if they were to apply for sfn multiplex licences

    倘若政府堅持于同一時間推出所有建議的單頻網路（ sfn ）及多頻網路（ mfn ） ，而現有地面電視廣播機構即亞洲電視及無
  12. Simulations are executed in altera ’ s quartus ii environment with altera ’ s stratix family fpgas using verilog hdl after analysis. the results show that the sfn adapter can properly insert mip into transport stream and the time to be delayed in sync system can be correctly calculated and carried out with fifo

    在對每一個模塊的設計要點做了詳細說明之後，採用verilog語言編寫各模塊邏輯代碼，在altera公司的quartusii5 . 0集成開發環境下，基於altera公司stratix系列fpga對各模塊及整個單頻網適配器進行了模擬。
  13. This master ’ s degree thesis firstly introduces and discusses the principle of synchronization in sfn ( single frequency network ) based on dvb - t focusing on some key points, then presents a design of sfn time synchronization system based on fpgas, including the modules of sfn adapter after the mpeg - 2 re - multiplexer and sync system serving as the front - side of the dvb - t modulator at transmitters

    本論文首先介紹並討論了dvb - t單頻網的時間同步原理，對其中的一些關鍵問題做了詳細的分析，在此基礎上提出了一種基於fpga的dvb - t單頻網時間同步的硬體設計方案，即位於mpeg - 2系統層復用器之後的單頻網適配器和發射臺調制前端的同步系統的fpga設計。
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