single frequency network 中文意思是什麼
single frequency network
解釋
單頻網-
With the purpose of maximizing the total profit of a network, the effects of the network model parameters on flight frequency, traffic and single flight occupancy of fully - connected and hub - and - spoke airline networks are investigated
摘要以網路利潤最大化為目標，分析了幾種網路模型參數對全連通航線網路和樞紐航線網路中航班頻率、客流量以及單航班座位數的影響。 -
By comparing the two types of airline networks based on the same network model parameters, it is found that the flight frequency, nonstop traffic and fare given by hub - and - spoke airline network is larger than that by fully - connected airline network, while the single flight occupancy is incomparable
基於相同的網路模型參數，對全連通航線網路和樞紐航線網路中的航班頻率、客流量、直達票價、單航班座位數之間的關系進行了研究，結果發現樞紐航線網路中的航班頻率、直達客流量和直達票價分別大於全連通航線網路中的航班頻率、直達客流量和直達票價，但是不能確定兩種航線網路中單航班座位數之間的大小關系。 -
Second part - the main contribution and research results of this paper are focused on as follows : ( 1 ) how to use the measurements of a dual frequency gps receiver to determine the ionospheric delay correction model for single frequency gps of a local range ; ( 2 ) how to separate the instrumental biases with the ionospheric delays in gps observation ; ( 3 ) how to establish a large range grid ionosphere model and use the gps data of chinese crust movement observation network to investigate the change law of ionospheric tec of china area ; ( 4 ) how to improve the effectiveness of correcting ionospheric delays for waas ' s users under adverse conditions. ( 5 ) how to establish the basic theory and the corresponding framework of monitoring the stochastic ionospheric disturbance using gps ( 6 ) how to improve the modelling ability of ionospheric delay according to its diurnal, seasonal, annual variations based on gps ; ( 7 ) how to meet the demand of correcting the ionospheric delay of high - precision orbit determination for low - earth satellite using a single frequency gps receiver 1 extracting ( local ) ionospheric information from gps data with high - precision the factors are systematically described and analyzed which limit the precision of using gps data to extract ionospheric delays
二、具體研究工作的系統報告，主要集中在以下幾方面：研究如何利用單臺雙頻gps接收機的觀測信息確定電離層延遲改正模型，為小范圍的單頻用戶服務；研究如何實時分離gps觀測中的儀器偏差與電離層延遲；研究如何建立較大區域的電離層格網模型，進而初步設想利用中國地殼運動觀測網路深入研究我國領域的電離層的電子濃度變化規律；研究單頻用戶在不利條件下，如何更好地利用電離層延遲改正信息；研究利用gps監測隨機電離層擾動的基本理論和框架方案；研究如何綜合顧及電離層的周日、季節和年變化，進一步提高利用gps模擬電離層延遲的能力；研究如何實現星載單頻gps低軌衛星的精密測軌中的電離層延遲改正要求。 -
Specification for simple telex terminals using single channel voice frequency signalling for connection to british telecommunications telex network
聯接于英國電信電傳網路的單頻道音頻信號用簡易電傳終端規范 -
Using single frequency network enhances mobile reception and no fine - tune of frequency is required
單一頻道可以覆蓋全港，流動接收及選臺更方便，不需微調頻率。 -
1 using single frequency network that enhances mobile reception and no fine - tune of frequency is required
單一頻道可以覆蓋全港，流動接收及選臺更方便，不需微調頻率。 -
Using single frequency network that enhances mobile reception and no fine - tune of frequency is required
（ １ ）單一頻道可以覆蓋全港，流動接收及選臺更方便，不需微調頻率。 -
The test methods for the technical specifications of inband pulsing single frequency line signalling system for automatic telephone switching network
電話自動交換網帶內單頻脈沖線路信號技術指標測試方法 -
As dab system serves an area by using one single frequency network, 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。 -
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。 -
Inband pulsing single frequency line signaling system for telephone automatic switching network
電話自動交換網帶內單頻脈沖線路信號方式 -
Sfn single frequency network
單頻網同步網 -
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。 -
In this thesis, we address this challenge in detail and design solutions to it and evaluate the performance of them by simulation. based on the traditional structure of cellular network and methods of radio resource allocation, we propose a novel synchronous single frequency cellular network ( sfcn ) system, which is more proper for 4g
本文圍繞第四代移動通信（ 4g ）及其核心技術ofdm （正交頻分復用）的要求和特點，在傳統的蜂窩系統結構和無線資源管理方法的基礎上，獨創地提出一種適用於4g的新型單頻蜂窩系統（ sfcn ， singlefrequencynetworkcellularnetwork ） 。 -
Dab, however, provides better sound quality, data transmission and serves with single frequency network
至於dab制式，可提供較佳音質數據傳送和單頻網路等。 -
The dsb system serves an area by using one single frequency single frequency network. this significantly expands the number of channels available and allows for a more efficient use of the available spectrum as well as more interaction with audience members
由於數碼聲音廣播支援單頻網路即全港均用單一頻率發射及接收的運作，因而可大幅節省頻率，及可傳送更多電臺服務。 -
The dsb system serves an area by using one single frequency ( single frequency network ). this significantly expands the number of channels available and allows for a more efficient use of the available spectrum as well as more interaction with audience members
由於數碼聲音廣播支援單頻網路（即全港均用單一頻率發射及接收）的運作，因而可大幅節省頻率，及可傳送更多電臺服務。 -
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。 -
If a single - frequency network is used to provide gprs service, the concern is the issue of coverage and in particular continuous coverage in urban areas
由單頻網提供gprs業務，首先是覆蓋問題，特別是市區的連續覆蓋。
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