線路鏈接網 的英文怎麼說
中文拼音 [xiànlùliànjiēwǎng]
線路鏈接網
英文
lln line link network- 線 : 名詞1 (用絲、棉、金屬等製成的細長的東西) thread; string; wire 2 [數學] (一個點任意移動所構成的...
- 路 : 1 (道路) road; way; path 2 (路程) journey; distance 3 (途徑; 門路) way; means 4 (條理) se...
- 鏈 : Ⅰ名詞1. (鏈子) chain Ⅱ動詞(用鏈栓住) chain; enchain Ⅲ量詞(計量海洋上距離的長度單位) cable length
- 接 : Ⅰ動詞1 (靠近;接觸) come into contact with; come close to 2 (連接; 使連接) connect; join; put ...
- 網 : Ⅰ名詞1 (捕魚捉鳥的器具) net 2 (像網的東西) thing which looks like a net 3 (像網一樣的組織或...
- 線路 : 1. [電學] circuit; line 2. [交通運輸] line; route
- 鏈接 : interlinkage; interlinking; [自動化] catenate;catenation; chaining
-
This thesis has introduced the development of the traditional wireless sensor network and current situation at first, then analyzed the principle an framework of the wireless sensor network, and the challenge to the traditional wireless sensor network technology for environmental monitoring, put forward the novel environmental monitoring system based on wireless sensor network technology, have recommended a kind of brand - new wireless node design plan of framework of wireless sensor network and node hardware to be designed and realized, then based on ieee 802. 15. 4 standard, this thesis analysed the design faces the wireless communication protocol stack used in environmental monitoring, have introduced the realize of physics layer, data chain layer, network layer, application layer. have solved the wireless sensor network data sampling, systematic energy - conservation optimize, this thesis summarized the preceding work finally, have looked forward to the development, application and commoditization in the future
本文首先介紹了傳統無線傳感器網路的發展概況及現狀,然後分析了無線傳感器網路的原理與架構及其在環境監測對傳統無線傳感器網路技術的挑戰,接著本文提出了新穎的基於無線傳感器網路技術的環境監測系統架構設計,介紹了一種針對大氣環境監測的全新的無線傳感器網路節點的構架設計方案以及節點的硬體設計和實現,然後本文以ieee802 . 15 . 4標準為基礎分析設計了面向環境監測應用的無線通信網路協議棧,從工程角度介紹了物理層、數據鏈路層、網路層、應用層的設計實現,解決了無線傳感器網路節點的數據採集、節點互聯以及系統節能優化等問題,最後本文總結了前面的工作,展望了基於無線傳感器網路技術的環境監測系統在未來的發展方向和應用方式等幾個方面的發展遠景。Because of the unique issues in the networks, including mobility - induced disconnection, network partition, high out - of - order delivery ratios and channel errors, the congestion control and the error recovery in the network is challenging. in this environment, the interaction between tcp and mac layer protocols, the affection of route protocols on the performance of tcp and the particular congestion control and error recovery mechanism are first discussed. then a particular transport layer protocol scheme based on the non - feedback mechanism is presented, with emphasis on the analysis and simulation of the key parameter
文中主要討論了兩種不同網路結構中的無線tcp協議改進方案,其一在最後一跳為無線鏈路的網路環境中,針對基本tcp擁塞控制機制存在的缺陷,文中在現有解決方案的基礎上提出一綜合性的方案,其中包括無線鏈路的高誤碼率和連接斷開問題的解決,並重點對方案中出現的交叉層問題進行分析和模擬;其二,考慮的是分散式網路( adhoc ) ,在文中較為詳細的分析了tcp和mac層機制間的相互作用、路由協議中造成tcp性能降低的因素、 adhoc網路中應採取的特殊擁塞控制和差錯恢復機制,在此基礎上提出了一種採用非反饋機制的解決方案,重點對方案中的關鍵參數進行分析和模擬,分析和模擬結果表明此機制可在很大程度上提高adhoc網路中tcp的性能。Displayed when you start visual basic express edition contains a news section that displays links to community events such as online chats and webcasts that are available to everyone
當您啟動visual basic速成版時顯示的「起始頁」包含一個「新聞」部分,其中顯示有社區活動的鏈接,如每個人都可參與的在線聊天和網路廣播。One of the most important events in the history of the development of tv technologies is the implementation of digital compression technology, which leads tv industry into a new rapidly developing stage. with satellite, cable and terrestrial transmission channels, dvb, of which the digital compression is the core technology, has such features as two - way channels, interactive functions, etc. in dvb system, the information of video, audio and text is digitalized and integrated to form a new kind of tv program. furthermore, through online digital information broadcasting, people can browse information of other programs while watching several programs just as they have done on the internet
電視技術發展史上最重要的里程碑是數字壓縮技術的廣泛應用,它將電視事業帶入一個新的高速發展時期,以數字壓縮為核心技術的數字電視廣播通過衛星有線和地面傳輸具有多功能雙向傳輸交互性等特點,不僅將圖像聲音和文字等信息數字化,而且將有關信息相互鏈接並有機地結合在一起形成了新的節目形態,特別是其採用了數字信息在線廣播方式,觀眾在收看到多套節目的同時還可以像訪問網際網路那樣瀏覽其它節目信息。Aim at the dtc ' s blemish mentioned above and the direction of dtc technique development, the dissertation put great emphasis on the work as follows, with an eye to exalt dtc system function : ( 1 ) a new speed - flux observer of an induction motor is proposed to enhance the accuracy of flux observing, which is an adaptive closed - loop flux observer and different from the traditions. a new adaptive speed - observation - way is deduced out according to the popov ' s stability theories ; ( 2 ) to improve the performance of dtc at low speed operation, we have to exalt the accuracy of the stator flux estimation and a new way of bp neural network based on extended pidbp algorithm is given to estimate and tune the stator resistance of an induction motor to increase the accuracy of the stator flux estimation ; ( 3 ) digital signal processor is adopted to realize digital control. an device of direct torque control system is designed for experiment using tms320lf2407 chip produced by ti company ; ( 4 ) bring up a distributed direct torque control system based on sercos bus, sercos stand for serial real time communication system agreement which is most in keeping with synchronous with moderate motor control ; ( 5 ) the basic design frame of the hardware and software of the whole control system is given here and some concrete problem in the experiments is described here in detail
針對上面提到的直接轉矩控制的缺陷和未來直接轉矩控制技術發展方向,本論文重點做了以下幾個方面的工作,目的在於提高dtc系統的綜合性能: ( 1 )提出一種新型的速度磁鏈觀測器,新型的速度磁鏈觀測器採用自適應閉環磁鏈觀測器代替傳統的積分器從而提高磁鏈觀測的精度,並且根據popov超穩定性理論推導出轉速的新型自適應收斂律; ( 2 )改善系統的低速運行性能,主要從提高低速時對定子磁鏈的估計精度入手,提出了一種提高定子磁鏈觀測精度的新思路? ?利用基於bp網路增廣pidbp學習演算法來實時在線地修正定子電阻參數; ( 3 )採用數字信號處理器dsp實現系統全數字化硬體控制,結合ti公司生產的tms320lf2407晶元,設計了直接轉矩控制系統的實驗裝置; ( 4 )提出了基於sercos總線網路化分散式的直接轉矩控制系統, sercos ( serialrealtimecommunicationsystem )是目前最適合同步和協調控制的串列實時通信協議; ( 5 )基本勾勒出整個控制系統的硬體和軟體設計基本框架,詳細描述一些實驗中的具體的細節問題。The content of this article is the research on the protocols for wireless communications on the media access control ( mac ) layer, which is a sublayer of the link layer, one of the five layers ( the physics layer, the link layer, the network layer, the transmission layer and the application layer ) which construct the stack of protocols for wireless communications. the emphasis of the research is on the applicability and superiority of two protocols on the mac layer
本文的研究內容是mac ( mediaaccesscontrol )層? ?無線傳輸的五層協議棧結構(物理層、鏈路層、網路層、傳輸層、應用層)中數據鏈路層的媒體接入控制子層? ?無線通信協議,重點研究兩種協議在傳感器網路應用中的適用性和優越性。But traditional fieldbus has been widly used in factory field and will act an important part for a long time, so it is necessary that to realize fieldbus connect to office network, make it has the capability of inter - connection and inter - operation, and keep it ’ s architecture unchanged. the paper discusses a method to slove the problem. that is making use of ethernet / ip protocol which is one of industrial ethernet protocols, to design an embedded fieldbus gateway. the gateway mainly consists of s3c2410, a 32bit high performance microprocessor based on arm core, to realize interconnection devicenet network, controlnet to ethernet
本文提出利用高性能、低功耗32位risc結構的arm處理器與armlinux嵌入式操作系統相結合,並利用ethernet / ip工業以太網協議構造嵌入式網關,實現設備的現場總線與企業信息網路無縫鏈接,並保證了devicenet和controlnet兩種網路的互操作性,構建一個可跨地域共享、便於實現高層次集中管理、監控和決策的新型嵌入式實時在線監控網路。This link may be a high - speed data communication circuit, a local area network ( lan ), a telephone live or a radio channel
這種連接的鏈路可以是高速數據通信電路、局域網( lan ) 、電話線路或無線通道。The data process is : manchester decoding, rate changing, hdlc link coding, hdb3 coding, then through the e1 line trasmission. the received data through the negtive process is changed into ethernet data and enters the 10base - t interface
其數據流程為以太網數據經過曼徹斯特解碼,碼率變換, hdlc鏈路編碼, hdb3線路碼編碼,進入e1線路傳輸;由e1線路接收的數據經過反過程變為以太網數據進入10base - t介面。Providing a novel access scheme for solving “ last mile ” wideband access and global person communications. in wireless optical code multiple access ( w - ocdma ) network, media access control ( mac ) is a key issue, which determines network performance 、 bandwidth efficiency 、 complexity and cost of terminal
無線光碼分多址( w - ocdma )接入網中,數據鏈路層的媒質接入控制技術( mac )至關重要,它直接影響網路的性能、帶寬利用效率、終端設備的復雜度和成本。What is more, i have implemented two profiles ( lap and dunp ) that enable one pc to access lan or dial up internet wirelessly by making another pc as access point, which is connected to lan or modem as usual
並且利用lap和dunp兩個profile實現了通過讓一臺pc作為數據接入點(以傳統方式接入局域網或連接modem撥號) ,而另一臺pc通過藍牙無線鏈路與數據接入點建立連接從而實現無線地接入訪問局域網利撥號上網。With the rapid development of wireless communication technology and computer technology , people wish to get reliable data communication service any time and any where. traditional network can not supply communication service if the whole network need to move because the network devices are fixed by wires and can not move. so, ad hoc network comes. it can provide mobile data communication service compared with traditional network. ad hoc is a network with plat structure and all the nodes is equal. all the nodes need provide relay. but not all the nodes will provide relay and the performance of plat structure is poor in large scale. so the wireless mobile self - organized network adopts a two - level structure by referencing the cell mobile communication system. wmsn uses wireless routers to construct network. it can provide wireless access, relay services to users
考慮到不是所有的站點都願意提供中繼服務及平面結構的局限性(在網路規模較大時性能會很差) ,本課題的無線移動自組織網路參考了蜂窩移動通信系統的特點,是一種具有兩級結構的網路。使用專門的無線設備? ? 「無線路由器」構成具有用戶無線接入、無線組網和路由功能的無線互連網路,為移動用戶提供無線接入、路由和中繼服務。 ieee802 . 11b可以提供很高的通信速率,可以提供很好的接入性能,並且支持ieee802 . 11b協議的設備正成普及的態勢,因此成為我們所選擇的鏈路層協議。Specifically, for the first time all factors impairing tcp performance are identified based on network protocol hierarchy, i. e., lossy wireless channel at the physical layer ; excessive contention and unfair access at the mac layer ; frail routing protocol at the network layer, the mac layer and the network layer related mobile node ; unfit congestion window size at the transport layer and the transport layer related asymmetric path
Tcp是一種面向連接的可靠傳輸層協議,最初是針對有線網路設計的。由於有線網路鏈路可靠性高,傳統tcp認為丟包和亂序是由網路擁塞所導致。然而,在manets中,眾多非擁塞因素導致了丟包和亂序。We designed a wireless asymmetric physical layer link model with a direct sequence spread spectrum system as a transmitted reference. uplink and downlink are both one - way links connected by an ip tunneling. uplink is consisted with the narrowband radio data link of the warfighter information networks ( win )
研究了無線非對稱鏈路,提出了一種用參考法直接序列擴頻( dsss )實現的無線非對稱數據傳輸的物理層鏈路模型:利用現有戰斗員信息網電臺的窄帶數據鏈作為上行通道,通過ip隧道技術保證單向鏈路的連通性。For campus network, cernet, chinanet and internet as " disciplines navigation system for network resources " takes subjects as units. through tapping, collecting, evaluating, classifying and cataloguing all kinds of net academic resources for some subject or correlative scope to open out the content briefly, it can establish classifying and organizing system, dll and effective retrieval system, and then publish them at the website of the library and provide navigating system of induct and retrieval clew for users
基於校園網、 cernet 、 chinanet和internet的「網路資源學科導航系統」是以學科為單元,通過對某一學科領域或與該學科相關的各種網路學術資源的挖掘、搜集、評價、分類、著錄,並對其進行簡要的內容揭示,建立網路資源分類組織體系及動態鏈接的指引庫和高效的檢索系統,發布在圖書館的網頁上,為用戶提供導引和檢索線索的導航系統。First, the author makes the waihuan road in tianjin as the study object. through analyzing of system target and user ' s demands, the author designs the spatial database and attribute database on the base of webgis software selected. the author connects the two kinds of data by the road section number and constructs the professional module not only to realize the management of waihuan road but also to evaluate and predict the pavement performance
為提高公路管理工作的效率,本文將人工神經網路技術應用於路面性能預測中,進行了基於webgis的路面管理系統的結構和功能設計,研究內容分為以下兩個方面:首先,以天津市外環線為研究對象,通過對系統的目標、用戶的業務需求分析,進行空間數據庫和屬性數據庫的設計,選擇適當的webgis軟體,在此基礎之上通過路段編碼進行空間數據和屬性數據的動態鏈接,建立路面管理系統專業模塊,在實現對外環線路面信息管理的同時,利用這些信息對路面性能做出評價和預測。Operating at 2. 4ghz, this is a radio - based way to link computers to networks with an acceptable connection bandwidth
它在2 . 4ghz運行,是一種基於無線電的方法:將計算機鏈接到具有可接受的連接帶寬的網路。Change the appearance of the lines that connect network diagram boxes and prevent network diagram boxes from crossing page breaks
更改鏈接「網路圖」方框的直線的外觀並防止「網路圖」方框跨過分頁符。Multiple hubs can be linked together to expand a local area network
若干個網路集線器被鏈接在一起來擴展一個局域網。Web links, itinerary routing
網際網路鏈接,路線計劃分享友人