解多路復用 的英文怎麼說
中文拼音 [jiěduōlùfùyòng]
解多路復用
英文
demultiplexing-
As a contrast, the loops linking customer terminals with the central offices are mostly traditional cupreous twisted - pairs, on which a data stream can only be transferred at a rate of no more than 64kb / s using an analog modem
隨著光纖技術的迅速普及，尤其是密集波分復用技術的大力採用，我國骨幹傳輸網的帶寬瓶頸問題已經基本得到解決。然而，在用戶終端到電信端局的接入網路上，絕大多數接入介質還是傳統的銅雙絞線。In all kinds of complicated network, oriented linking and unlinking, communication frequency resource is strained, and bandwith to transmitting audio frequency signal is too restricted, complicated and fluky, while audio frequency data exponential have been increased in the last several years. under the circumstances, based on the research of predecessor, this paper studies wavelet analysis ' s maths gist and practices significance on signal process, and puts forward a optimized wavelet package condensation arithmetic to process audio frequency data, which gives attention to coding efficiency, multirate and compression delay. simulation experiment on the arithmetic has been done by matlab
針對無連接和面向連接的各種復雜網路環境下，通信頻帶資源緊張，音頻傳輸帶寬有限且復雜多變，而各種音頻數據又日益增多的局面，本文研究小波分析在信號處理方面的數學依據和在數據壓縮方面的實際意義，在前人不斷工作的基礎上，提出了一種優化小波包變換編碼方案用於音頻數據的壓縮演算法，兼考慮了編碼效率、多碼率和壓縮時延多個方面，並在matlab環境下做了模擬實驗，對各種音頻信號及多種小波函數做了模擬結果比較，實驗結果證明該演算法可以在一定計算復雜度下可以很好地改進壓縮效果，達到多碼率下實現實時編解碼的過程，在高速dsp晶元等硬體設備支持下，可以有效應用於實際復雜多變信源編碼。Based on consider hereinbefore, this dissertation discusses several aspects on the problem of the sustainable and optimum exploitation of groundwater resources as follows : ( 1 ) reviewed entirely the origin and evolvement of the concept " sustainable development ", stated and commented the study status in queue on " sustainable development " around national and international range, thorough discussed the science connotation about the concept " sustainable development " ; ( 2 ) looked back and commented across - the aboard some furthest basic concept and proposition related to groundwater resources, put forward self opinions on a few existent mistake points of view and chaos understandings ; ( 3 ) expatiated entirely on the content and meaning of the theory of changeable groundwater resources system, contrast with the traditional methods of groundwater resources calculation and evaluation, combined example to show the application of this theory ; ( 4 ) thorough analyzed the difficult and complexity to forecast the groundwater resources, fully stated the traditional methods of groundwater resources forecasting, pointed out the characteristic and applying condition of these forecasting method, introduced the main ideas and methods of wavelet analysis developed recently, and the matlab software be known as the fifths era computer language, and its accessory wavelet analysis toolbox, applied these methods and tools to analyze the groundwater dynamic curve, adopted the b - j method and morte - carlo method, combined with the theory of changeable groundwater resources system, discussed the new view on the forecast of groundwater resources ; ( 5 ) synthetically analyzed the characteristics and limitations of the present all kind of groundwater manage model, combined mathematical programming mathematical statistics random process and the theory of variation system of groundwater resources on the unite optimum attempter of surface water and groundwater, emphasized how to make the model more nicety, more simple, more practicality ; ( 6 ) analyzed the inside condition and outside condition to assure the sustainable and optimum exploi tation of groundwater resources, the inside conditions are the follows : correct resources idea, scientific methods of resources calculation and evaluation, credible forecast methods of resources, exercisable measures of resources management, the outside conditions are the follows : the development idea of high layer, the transform of manage system, the matched policy and rule of law, the adjusted of economy lever, the improve of cultural diathesis, the boosting up of water - saving consciousness and detail measures, the control of population rising, the prevention and cure of water pollute, the renew and rebuild of ecology ; ( 7 ) scan the sustainable and optimum exploitation of groundwater resources from the high level of metagalaxy, earth system science, and philosophy ; lint out the more directions on groundwater resources
基於以上考慮，論文主要從以下幾方面對地下水資源可持續開發問題進行了比較深入的探討：全面回顧了「可持續發展」概念的由來與演變，對國內外「可持續發展」的研究現狀進行了述評，並對「可持續發展」概念的科學內涵進行了深入探討；對涉及地下水資源的一些最基本的概念和命題進行了全面的回顧和評述，對目前仍然存在的一些錯誤觀點和混亂認識提出了自己的見解；全面闡述了地下水資源變值系統理論的內容和意義，並與傳統的地下水資源計算評價方法進行了對比分析，結合實例具體說明了方法的應用；深入分析了地下水資源預測預報工作的極端重要性和復雜性，對傳統的地下水資源動態預測方法進行了全面的評述，指出了各類預測預報方法的特點及適用條件，對最近二十多年剛發展起來的小波分析技術的主要思想和方法及其應用范圍，以及號稱第五代計算機語言的matlab軟體和附帶的小波分析工具箱進行了介紹，並應用於地下水動態過程線的分析，採用時間序列中的b ? j法，蒙特卡羅方法，與地下水資源變值系統理論相結合，探討了地下水動態資料分析和地下水資源預測預報的新思路；綜合分析了現今各類地下水管理模型的特點及缺陷，將數學規劃、數理統計、隨機過程等與地下水變值系統理論相結合進行地表水地下水或多水源的聯合優化調度，使模型更準確、更實用；對保證地下水資源可持續開發的內部條件和外部條件進行了分析，內部河海人學博卜學位論文前言、摘要、目錄條件主要是正確的資源觀，科學的資源計算與評價方法，可靠的資源預測預報技術，可操作的資源管理措施，外部條件主要是高層發展思路、管理體制的變革、配套的政策法規、經濟杠桿的調節、人文素質的提高、節水意識的增強及具體節水措施、人口增長的控制、水體污染的防治、生態的恢復和重建等;從宇宙科學、地球系統科學及哲學的高度審視地下水資源的可持續開發;指出了地下水資源可持續開發的進一步研究方向。We study the cost of metro wdm in two aspects in chapter 2. for the aspect of components, a bidirectional optical add - drop multiplexer ( boadm ) using fiber gratings and circulators is designed, and is cheaper, simple and appropriate compenent for single - fiber bidirectional ring networks ( sfbrn ). for the aspect of network, after study the traffic - grooming problem and the cost of wdm ring networks, a layered network with a multi - hubs is presented to reduce the total number of the network ports
在第三章，我們搭建了一個可以實現多業務單纖雙向傳送的sdh wdm網路平臺，以單根50km光纖作為物理媒質，以mux demux的為單纖雙向復用器件，以sdh wdm為傳輸手段，採用mstp技術，通過接入vlan模塊建成一個單纖雙向傳輸的局域網，並以此為基礎通過接入圖像編解碼器實現單纖雙向視頻傳輸，為城域寬帶接入網的多業務實現提供了範例。Confronted with the explosion of communication traffic in internet, the communication networks architects make great efforts to provide scalability for switch architecture in the current routers and switches. single - stage switches are hard to implement in scalable switches for the limitation of pins and complexities of ic design
交換網路處理的業務流量增長要求交換網路的容量需要不時地進行升級，單級交換機由於受晶元的管腳和ic實現復雜度的限制，無法應用於大規模可擴展交換機，因此，採用由多個交換單元構成的多級網路是目前常用的解決方案。We can bring forward many projects based on different views during highway network planning. but when choosing the most feasible or the best one in all kinds of projects we must analyze and calculate very frequently. we can use multiattribute - decision and multiobject - decision to smoothly solve complex planning problem by the help of combining quantitative analysis and qualitative analysis
在公路網規劃中，可以從不同的角度提出多種規劃方案，但是，要從許多方案中挑選出最佳方案或是最適宜的方案，必須經過大量的測算及分析，把定量分析和定性分析結合起來，利用決策分析系統的多屬性決策分析、多多目標決策分析等方法才能便利地解決很復雜的規劃問題。The multiplexer which is used to multiplex and demultiplex the digital tone and low speed data in a channel is the key transitting e - quipment in the electric power transitting system
實現數字話音和低速遠動數據二者在一條通信通道上的多路復用和解復用器，是電力通信傳輸系統中的一項關鍵設備。Dvb / mpeg - 2 transport stream multiplexer / demultiplex takes an important role in digital video broadcasting system. it can combine several transport streams from source encoder into a single transport stream to transport channel, or demultiplex trasnsport stream into one program sorce to source decoder. its performance has a great influence on the program transmission ability of hdtv system and the decoding quality of decoder in hdtv receiver. mpeg - 2 system multiplexer signalized video, audio, host data and so on to fixed length packet type for making transport stream
Dvb mpeg - 2傳送流復用解復用是數字電視廣播系統中的重要組成部分之一，它將從信源編碼器輸出的多路節目源復用成一路傳輸流送入傳輸通道，或者從通道中包含多路節目源的一路傳輸流中解復用出一路節目送到解碼器解碼。On the base of fully utilizing the available data about tectonic maps and structural elements, the present paper has made synthesized research that used the ways of stratigraphic sequence edge unconformity analysis and stratigraphic thickness correlation analysis, and combined seismic - data interpretation, review of paleo - structure and ancient landform and research of tectonic evolution and petroleum system, and combined region and location, plane and profile and time and spatial. by the synthesis analysis on tectonic evolution of hetian paleo - uplift in tarim basin, the results indicate that : ( 1 ) hetian paleo - uplift is a sedimental and erosional paleo - uplift. the formation and evolution of the hetian paleo - uplift experienced three stages, that is, the uplifting and eroding stage of the caledonian period, the depositional stage of the hercynian period and the destroying stage of the himalayan period, and evolved from paleo - lift to inclining strap at last
本文採用地質和地球物理相結合的研究思路，運用多種技術手段和方法；在充分利用已有構造圖資料和構造要素資料的基礎上，運用地層層序邊界不整合分析法、地層厚度對比分析法，結合地震資料的精細解釋、古構造和古地貌的恢復、構造演化史研究、含油氣系統的研究，和區域和局部、平面和剖面、時間和空間的結合研究，對塔里木盆地和田古隆起構造演化及油氣關系進行了綜合分析，認為： （ 1 ）和田古隆起為一沉積?剝蝕性古隆起；形成於志留-泥盆紀；其構造演化可分為三個階段，即加里東期的抬升剝蝕階段、海西期的沉積階段和喜山期的破壞階段，最終由古隆起演變為一斜坡帶。So, how to enhance the power of competition of chinese industry and companies is being the issue which the academia had to consider. while the modularity, being an effective method to resolve complicated system or product, has been used in the design 、 exploitation and the production of computer since 60s, 20 century, and has been applied the realm the industry of auto, architecture etc. this method is changing company ’ s notion, promoting resource been distributed and utilize reasonable, enhancing the power of competition of industry, and promoting the corporation between enterprises. in a word, as the developmental direction of industrial organization in 21 century, modularity is changing the structure of industry and enterprise, and will take us into a modularity age
而模塊化作為一種解決復雜問題的有效辦法，從20世紀60年代在計算機電腦產業的產品設計、開發和生產中得到應用開始，已經被越來越多地應用到汽車、建築、網際網路通訊等諸多產業領域，它促進了社會資源的合理分配和利用，提升了產業的競爭力;推動了企業間的合作，有助於產品生產成本和交易成本的降低;加快了創新的速度，為消費者提供了更多具有個性化的產品和服務… …總之，模塊化作為21世紀產業組織發展的方向，正在改變著現存企業的經營理念，改變著產業的結構，並將我們帶入到一個模塊化的時代。A series of key techniques have been so1ved as we11. now we have completed this design. the system has passed the qua1ity va1 idat iofl of our compafly and fina1 1 zat ion for both des ign and product ion
作者完成了系統方案設計、各個主要模塊以及多路可變速率數據分接復接器（ dtv35和dtx50兩種專用晶元）的設計、實現，解決了一系列關鍵技術。Arrayed waveguide grating is one of those components which is based on plc technology. aim at designing arrayed waveguide grating for wdm system.,
基於平面光波迴路plc的陣列波導光柵awg器件可以實現高性能，多通道，高波長分辯率的波分復用解復用。First, it is very fast with a roughly linear time with respect to network size. second, it exhibits a good clustering capability and especially can work well with complex networks without well - defined community structures. finally, it is insensitive to its built - in parameters and requires no prior knowledge
盡管目前已存在多種復雜網路共體挖掘演算法最早的工作是girvan和newman提出的基於邊介數的gn演算法，但其中絕大多數都是針對只包含正關系的復雜網路提出，對符號網路並不適用，因此如何快速和準確地挖掘符號網路共體仍然是一個未被很好解決的問題。Because multiplexer accessing has some disadvantages such as low utilizing rate of band, each terminal having only application, being trouble to maintain and update, specially, can not meeting the need of new software of bank ; however, dumb terminal accessing has not this disadvantages and has some advantages of more functions, more security, easy extending, low cost of running and so on
因為多路復用器終端接入方式帶寬利用率低，終端只支持單個應用，維護和升級困難，更重要的是不能滿足銀行新一代應用軟體的需求；而路由器啞終端接入方式不僅能解決這些問題而且還有功能增多，安全性提高，擴展性提高，營運費用降低等好處。Firstly, the basic principle of ocdma, the basic theory of ooc and the key technologies of ocdma are introduced. the development, research status and trends of ocdma technologies are also summarized. combining with other multiplexing technologies and using fiber gratings as the encoder / decoder are the trends of ocdma system
論文首先對ocdma的基本原理、光正交碼的基本理論以及關鍵技術進行介紹，對光碼分多址技術發展歷史、研究現狀以及發展趨勢進行總結，指出同其它復用方式相結合的混合全光網路和採用光纖光柵編解碼器是光碼分復用技術最有希望的發展方向。Abstract : all three types of transmultiplexer are explained from the view of filter banks. addtionally, an optimal algorithm for the analysis filter banks is proposed under the environment of additive white gauss noise ( awgn ). the analysis filter banks derived from the algorithm can match the spectrum characteristics of the input siganls
文摘:從濾波器組的角度出發，對多路復用通信方式進行了解釋，同時給出了高斯加性白噪聲情況下分析濾波器組的最優求解方法，通過該方法得到的分析濾波器組能夠較好地跟蹤輸入信號的譜特性。Measurement accuracy of phase - shift laser range finders is up to millimeter level in large range through multi - frequency modulation and high precision phase difference measurement. however, laser range finders existing is not suitable for large range high speed tracing measurement for their complex multi - frequency modulation circuit and conflict between precision and speed in phase - shift measurement. in order to improve the large range measurement speed and accuracy, key technologies on multi - frequency modulation and high precision phase - shift measurement are deeply researched in this paper
相位法激光測距採用多頻調制和高精度的相差測量技術可以在大范圍內實現毫米甚至更高精度的測量，但現有的測量裝置由於存在多頻調制電路復雜和沒有很好的解決相差測量的高精度和快速測量之間的矛盾問題，使得相位法激光測距很難應用於大范圍目標快速的跟蹤測量。In this paper, the method of in - bore abnormal phenomenon remote detecting is presented. considering of the multi - channel transient signals automatic acquisition, a project of pcm signal hardwire transmission data automatic acquire system is put forward. in this system, a pcm demodulate board is designed, it can decode the pcm code string which contain the information of the multi - channel transient signals, it also can catch the useful data automatically, and transmit these data to upper pc by rs485
在該系統中，為了能夠解調出包含多路動態信號數據的高碼速率pcm信號，設計並製作了一種適用的pcm解調板，能夠從pcm碼流中恢復出位時鐘信號，從而與發送端保持位同步和幀同步，從而對pcm碼流可靠地解調、緩存，並能根據計算機設定的觸發條件自動地捕獲多路信號的有效段，然後利用rs485總線將這些數據可靠地遠傳至計算機以供顯示、分析和保存。Thirdly, this dissertation gives a synchronization algorithm of double work - stations " playing out based on digital reference information
同時，該演算法也對mpeg硬體解碼器及其他多路復用格式的視音頻解壓具有借鑒價值。On the other hand the crosstalk of the wdm signal at fan - out of demultiplexer will increase with the power difference of the each channel. therefore, the gain of optical amplifier to wdm signal must have small ripple. one of the solutions is using two or more pumps with different wavelength and power according to the range of signal light to be amplified and raman gain coefficient of the fiber
另外，各路信號光之間較大的功率差異會增加wdm通道解復用器輸出端的串話，所以光放大器對wdm各路信號光的增益要滿足一定的增益平坦度，解決該問題可以根據所要放大的wdm信號光的波長范圍和所用光纖的拉曼增益系數譜，採用多個不同波長和功率的泵浦光源進行泵浦。分享友人