tdm system 中文意思是什麼
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Gpon is multi - point to point network topology structure in upstream direction. in order to transmit tdm services, besides the common modules such as dba, fec, aes, the system also need data adjustment, clock recovery, and so on
其中同步時鐘恢復是實現tdm接入的重點和難點，因此本文重點討論了同步時鐘恢復的方法，在研究atm和sdh時鐘恢復方法的基礎上，提出了同步殘余時標法和同步時鐘統計恢復法。 -
A cable tv system has 100 commercial channels, all of them alternating programs with advertising. is this more like tdm or like fdm
100個頻道是頻分復用；每個頻道又由節目和廣告來時分復用。 -
The dissertation explains the importance and meaning of the traffic improvement of center district of cities, and enumerates some practical experience at home and abroad, then on this basis, the dissertation summarizes some countermeasures and methods which are commonly used in improving traffic of domestic and international center district of cities at present ; secondly, the dissertation recommends yuncheng city traffic evolution of system, defines concrete range of central district of yuncheng city, explains yuncheng city land of central district use current situation and traffic current situation and his characteristic, summarizes the central district traffic systematic existing problem and reason in the city of transporting on this basis. finally, from adjusting the overall arrangement of ground, traffic system improvement, to traffic system management ( tsm ) and traffic demand management ( tdm ) four respect, the dissertation put forward some concrete countermeasures on transport improvement of central district of yuncheng city. the dissertation has appraised the result that the countermeasure is implemented in advance
論文首先闡述了城市中心區交通改善的重要性和意義，列舉了國內外的一些實踐經驗，並在此基礎上總結了目前國內外城市中心區交通改善常用的一些對策及方法；其次，介紹了運城市交通系統的演化，並界定了運城市中心區的具體范圍，對運城市中心區的土地使用現狀和交通現狀及其特徵進行了闡述，在此基礎上總結了運城市中心區交通系統存在的問題及其原因；最後，從用地布局調整、交通系統改善、交通系統管理和交通需求管理等四個方面對運城市中心區交通的改善提出了一些具體對策，並對對策實施的結果進行了預評價。 -
In a time division multiplex ( tdm ) system, a repetitive group of signals resulting from a signal sampling of all channels, including any additional signals for synchronizing and other required system information
在時分多路復用（ tdm ）系統中，由所有通道的信號采樣中產生的重復信號組，它包括為同步要求的附加信號和其它需要的系統信息。 -
Firstly, the task, structure, technology and function of the existing dispatch system were introduced, whose key technology is based on the tdm and time division switch like pstn. further, the developing direction of pstn is based on ip, the pocked switch system and network, and also the dispatch system of the manned space flight launch base will transmit multimedia information on ip
首先，介紹了現有調度系統的任務、結構、技術和功能，可以看出，其技術核心是時分多路復用和時分交換技術，現在公用交換電話網（ pstn ）正向基於ip的包交換系統和網路發展，載人航天發射場調度系統也將利用ip網路技術傳輸多媒體指揮信息。 -
Based on the above analysis results, the system design is finished. the system design principal is detailed. the system architecture and data transmission proctocal are discussed. in order to transmit multi - channel data simutaneously on the monacable, tdm ( time division multiplexing ) technique is adoped in the system design. a special code is designed for data transmission on the tool - bus, so that the too - bus can both supply power and transmit data
包括單芯電纜數據傳輸系統的設計思想、結構設計和數據傳輸協議的制定。在單芯電纜數據傳輸系統設計中，採用時分多路復用技術，實現多種參數儀器數據的同時傳輸。在儀器總線上採用特殊的碼進行數據傳輸，使得儀器總線既能供電又能傳輸數據。 -
In tdm system, it ’ s the key problem to achieve steady and reliable frame synchronization. we can only resume original signals if we get the real frame synchronization
在時分復用系統中，如何實現穩定可靠的幀同步是必須解決的關鍵問題，只有可靠的幀同步，才能夠正確的恢復出原始的各路信號。 -
The main results and creative points in the dissertation were as follows : a ) by means of studying on the fiber - optic hydrophones ’ tdm array based on phase generated carrier ( pgc ) demodulation with laser frequency modulation, the mathematic models were set up, used for theoretical analyses of noncoherent crosstalks in the system using low coherent laser and coherent crosstalks in the system using high coherent laser. the formulas calculating crosstalks were given, and the method measuring crosstalks was shown definitely
本論文的主要研究結果和創新在於: 1 、通過對基於光頻調制pgc （相位生成載波）解調光纖水聽器時分復用系統的研究，針對低相干光源的串擾強度迭加和高相干光源串擾的相干迭加，建立了理論分析的數學模型，得出了計算串擾的公式，明確了測試系統串擾的方法。 -
Given the above situation, this paper proposes a series of policies and measures for sustainable urban transportation development such as establishing strategies of giving priority to urban public transportation development, building a transit - oriented comprehensive urban transportation system, promoting industrial eform of urban public transportation, enhancing the construction of urban transportation infrastructure facilities, and accelerating the implementation of travel demand management ( tdm ) measures
在此基礎上，提出了一系列發展可持續城市交通的政策措施，如確立優先發展城市公共交通戰略；構築以公共交通為主導的城市綜合交通體系；推進城市公共交通的行業改革；加強城市交通基礎設施建設；加快實施交通需求管理等。 -
Beijing city ’ s tdm policy assessment system is constituted and includes benefit and cost evaluation, equity evaluation, acceptability evaluation, and feasibility evaluation
建立北京市交通需求管理措施適用性評價體系，包括實施效益評價、成本評價、公平性評價、可接受性評價和可實施性評價。 -
A algorithm of frequency estimation for tdm channel of inmarsat system
通道中心頻率估計演算法 -
In the tdm system, it is an important technology to realize frame synchronization for that the communication goes along normally
在時分復用系統中，實現幀同步也是該系統正常通信的重要技術。 -
Famous integration software i - deas has advanced team data management system, this paper detailedly introduces the tdm system ' s work mode which has rich reference value
6 、本系統的一大特色就是基於i - deas軟體進行二次開發的。 -
The forming mechanism of crosstalks in the tdm system was analyzed theoretically, and the relationship between crosstalks and the extinction ratio of optical pulse modulator used in the tdm system was investigated. the interchannel and intrachannel crosstalks in the wdm system were discussed separately, and the contributions to crosstalks were appraised from architecture ’ s alteration, the finite isolation between channels in multiplexers or demultiplexers, and nonlinear effects in the system. noises in the large - scale multiplexing system were studied theoretically, and all kinds of factors were considered that have relation to noises, phase resolution, and dynamic range of the system, such as multiplexing channel number, the length of the transmission fiber, using in - line erbium - dropped fiber amplifiers or not, and so on
本文從理論上分析了光纖水聽器時分復用系統串擾的形成機理，分析了光脈沖調制器的消光比與系統串擾的關系;分別對光纖水聽器波分復用系統的異頻串擾和同頻串擾進行了理論分析，研究了光纖水聽器波分復用結構、波分復用器與解復用器隔離度等因素以及非線性效應對系統串擾的影響;對大規模光纖水聽器復用系統噪聲進行深入細致的理論分析，研究了系統噪聲、相位解析度、動態范圍與復用數目、傳輸光纖長度、中繼光纖放大器等諸多因素的關系。 -
G. shdsl dsu is a tdm mode, ram line code based cpe designed to be interoperable with the existing and future dslam or multi - service access system in the market
Shdsldsu是基於tdm模式和pam線路編碼的用戶端設備，可與市場上現有和將來的dslam或多服務接入系統互通。 -
Ethernet provides best effort service, which does not provide quality of service and equity for different users. the topology structure of epon system contains many onus, which share bandwidth in the uplink direction using tdm method
由於以太網提供盡力而為的服務，不能保證不同業務的服務質量以及不同用戶的公平性;另外， epon系統的拓撲結構是由多個onu採用時分復用方式共享上行鏈路帶寬。 -
With the development of the large - sale arrays of fiber - optic hydrophones, time - division multiplexing ( tdm ) and wave - division multiplexing ( wdm ) have been adopted widely. crosstalks and noises in the system become the key necks that baffled greatly the progress of large - scale arrays
隨著光纖水聽器技術向著超大規模陣列方向發展，時分、波分復用技術被廣泛的採用，串擾與噪聲問題成為制約大規模陣列發展的瓶頸。
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