點間通信線路 的英文怎麼說
中文拼音 [diǎnjiāntōngxìnxiànlù]
點間通信線路
英文
point-to-point circuit- 點 : Ⅰ名詞1 (液體的小滴) drop (of liquid) 2 (細小的痕跡) spot; dot; speck 3 (漢字的筆畫「、」)...
- 間 : 間Ⅰ名詞1 (中間) between; among 2 (一定的空間或時間里) with a definite time or space 3 (一間...
- 通 : 通量詞(用於動作)
- 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...
- 通信 : communication; communicate by letter; correspond
- 線路 : 1. [電學] circuit; line 2. [交通運輸] line; route
-
Users could incept real time video stream with pda through gprs anytime and anywhere, which validate the possibility of video transmission under the third mobile communication systems
用戶可以利用手持式設備- - - pda在任何時間,任何地點通過無線gprs網路實時接收視頻流;從而驗證了第三代移動通信系統中進行視頻通信的可行性。The development of fieldbus technology made lonworks field bus outstanding in all kinds of fieldbus. this paper simply introduces some kinds of common using fieldbus and the important position and influence of lonworks fieldbus in all kinds of fieldbus, carefully describes the technology core of lonworks technology, puts great emphasis on the introduction of the development and design of public security node of intelligent district which adopts computer, communication and control technology, carefully designs the interfaces of hardware circuits. the public security node of intelligent adopts 8031 single chip as its main processor to complete the application program of user, which mainly collects, process and control all kinds of field signal, and neuron chip 3150 as its slave processor to communicate with other nodes on field network, which works under parrel slave a mode
現場總線技術的發展使得lonworks技術脫穎而出,本文簡要介紹了常用的幾種現場總線的概況以及lonworks技術在現場總線技術中的地位和影響,對lonworks技術的技術核心:神經元晶元、 lontalk協議、 lonworks收發器、 lonbuilder及nodebuilder進行詳盡的描述;重點介紹了集先進的計算機技術、通信技術、控制技術為一體的智能小區安防節點的開發與研製,對節點硬體電路的各種介面進行了詳盡的設計。本文設計的智能小區安防節點採用單片機8031作為主處理器來完成用戶的應用程序,主要負責對各種現場信號進行採集、處理及控制,工作在并行從a方式下的神經元晶元mc3150作為從處理器,主要完成與現場網路上的各節點及中心控制室之間的通信工作。In the brief introduction to geographical information system ( gis ), this dissertation proves that by combining reliable management with gis technology, presents a method which built the power structure model and math calculation model by using spatial data in a good interface between computer and user. this dissertation makes a number of target for calculating the distribution system, mainly aimed at circumstances which have an effect on power station repair, switch breaker, type of t connection, and double lines supply via the usage of system reliability calculation. at the same time, it provides the projected estimatio n when power station or transmission line will be added into the power system, and furnishes the theoretical information that the professional needs for power structure programming, design and equipment management
通過建立輸變電設施管理信息系統( mis ) ,真實地反映出油田電網輸變電設施的運行管理現狀,為網路可靠性計算提供可靠的計算依據;在簡述地理信息系統( gis )技術的基礎上,論證了可靠性管理與電力gis技術結合的可能性,創立了在簡潔的人機圖形界面下利用空間數據建立網路結構模型及可靠性計算模型的方法;通過建立網路可靠性計算系統,進行了計及變電所檢修影響、切換開關、 t接點及雙回線供電情況下的可靠性指標計算分析,對油田電網及變電所(線路)的改(擴)建方案、增強性措施及接入系統的可靠性給予了工程評估,為電網規劃、設計及日常的設備管理提供分析決策依據。At the beginning of design, the central controlling communicating tragedy was taken, navigation, localization, control, user communication, routing, routed and wireless resource management of whole network are all controlled by the network controller
系統設計之初,採用集中控制的通信策略,全網的導航、定位、控制以及用戶間的通信都由網控節點進行路由和無線資源分配管理。This thesis presents a new solution called the smart platform, which better tackles the problems by : 1 ) a runtime environment discovery mechanism which allows a new device to automatically find and join the runtime environment ; 2 ) the loose coupled publish - subscribe inter - module coordination model, which caters for the spontaneous interaction between modules ; 3 ) a global - local two - layer runtime environment structure. the transient failure of the wireless network can be recovered at the local environment layer. the asynchronous nature of the interactions in the < wp = 8 > publish - subscribe model also prevents modules from blocking on the transient network failure ; 4 ) distinguishing two classes of communications with different qos requirements, the message - oriented and the stream - oriented
本文提出並實現了smartplatform ,其特點是: 1 )運行環境發現機制,使外來計算設備可以自動加入軟體平臺的運行環境; 2 )松耦合的發布/訂閱式模塊間協調機制,模塊間關聯可以自發組織; 3 )局部全局的兩層運行環境組織策略,無線網頻發的暫時故障可以在計算設備的局部運行環境層次被屏蔽掉;同時發布/訂閱模型的異步性也使得模塊不會因網路故障而阻塞; 4 )區分智能空間中的兩類不同的通信需求面向消息的和面向流的,並分別為它們提供了優化的通信層支持; 5 )基於多agent抽象模型,為整合不同應用領域的模塊和遺留代碼提供了有力工具。In the system, the low voltage power line is the first signal tunnel without any other relay equipments between customer terminal and substation collector, public telephone line serves as the second signal tunnel between substation and management center computer. as a breakthrough of conventional concept of electricity meter, this thesis initiate a new concept, namely, intelligent power customer terminal ( shortly, customer terminal ), which is developed with spread spectrum plc communication functional and possesses many advanced functions, such as, in addition to electric energy acquisition, guarding against electricity pilfering, preventing wrong connection, protecting malfunction, remote communication ( for example, remote power supply or halt, remote configuration of electricity meter, remote load control, etc ), and so on
本文首先系統地總結了目前國內外低壓電力網數據傳輸技術的研究現狀和存在的問題,在此基礎上,從理論上論證了在低壓電網上應用擴頻載波數據通信技術的可行性和優越性,並重點論述了擴頻載波技術抗電力線噪聲干擾的機埋;本文提出了一個新穎的基於低壓電力線擴頻載波通信技術的集中遠抄系統的總體方案,即由用戶終端、集中器和電能管理系統所組成的網路系統,其中,用戶終端到配變集中器用低壓電力線作為通道,中間無需其他硬體中繼設備,集中器到電能管理系統用公用電話網作為通道。In this special task, shanghai telecom provided in total 2, 540 telephone lines, more than 50 private lines for government and media use, 72 fiber cores, 982 adsl ports and 107 isdn ports. 13 sets of satellite antennas were employed ( including 5 emergency sets and 10 leased satellites ), tv signal transmission amounted to 355 times with an overall transmission length of 8, 716 minutes. all the 150 news booths were provided with 8 information points ( 4 internet jackets and 4 phone jackets )
上海電信在這次通信服務中,共提供電話線2540條,政府和媒體專線50多條,光纖72芯, adsl網路埠982個, isdn埠107個;啟用13付衛星天線(其中機動衛星天線5付、租用10顆衛星) ;傳送電視355次,總傳送時長8716分鐘; 150間新聞工作間每間都提供8個信息點( 4個上網通道、 4個電話通道) ; 1000cm2的新聞工作大廳安裝了400個終端。In the aspect of the choice of the comprehensive network schemes, it proposes to have the whole communication network categorized into backbone networks and specialist networks, due to the fact that city ' s trail transportation involves vast investment and lengthy construction and must be implemented line after line, period after period, etc. how to connect pots of specialist networks to backbone network so as to effect business transmission across lines has also been discussed
3 、網路總體方案的選擇比較:針對城市軌道交通的建設投資大,時間跨越長,分線、分期施工建設的特點,將城市整個通信網分成骨幹網和專線網。在骨幹網中如何將各專線網的一個或多個骨幹節點組合,實現跨線的業務傳輸。The directional routing protocol ds _ dsr put forward by the author is the improvement of the current protocol dsr, complete routine discovery and maintenance by directional neighbor nodes routing table, source routing and directional steering. the research discovers the application of the directional antenna, compare the omnidirectional antenna can increases the networks " total throughput, obviously reduces the co _ channel interference ( cci ), multiple access interference ( mai ), enlarges the nodes " signal and interference to noise ratio ( sinr ), and because of the high gain of directional antenna can realize the communication with farther distance and less jump, end to end delay can decrease deeply, simultaneously, security of networks can be improved partially, the node energy also can be saved easily by power control
本文提出的定向路由協議ds _ dsr是基於對現有協議dsr的改進下實現的,通過定向鄰節點路由表、定向源路由和定向搜索來完成路由發現與維護。研究發現,定向天線的應用,相比全向天線可明顯提高網路的總的吞吐量,減少通道干擾、多址干擾,提高信干噪比,且由於定向天線的高增益可實現較遠距離、較少跳數的通信,減少了路由發現時間,這樣大大減小了傳輸時延,網路的整體性能得到了不同程度的提高,同時部分地解決安全問題,通過功率控制還可較容易的實現節能的目的。The contents are using fault locating algorithm based on measurement impedance to determine a fault zone of transmission line, then use wavelet transform fault locating algorithm based on current traveling wave to fix the fault position. in order to ensure both results are valid, gps is used to synchronize their hardware. 2
其主要內容是:利用所記錄的工頻故障信息和阻抗法粗略計算故障位置,再利用所記錄的暫態行波電流精確定位故障點,二者通過gps時間同步單元進行時間同步,從根本上解決輸電線路故障測距問題。Concretely, on the basis of describing the communication specification of arinc 429 with enhanced parallel port ( epp ), the standard and the module application of dsp and cpld, the thesis has proposed the design of the arinc 429 technology based on dsp system. at first, the function and the application of each module of the system and the operation principle of high - performance cmos bus interface circuit hs - 3282 chip which forms the main body of the data diversion of the interface module are introduced. secondly, the hardware structure of the interface module is described in detail, mainly including data latch and buffer circuit, choice circuit of transmission rate, etc. and then the design philosophy and flow charts of the software are fully discussed, such as the basic requirement of software, the design and realization of the function
本文在簡單的論述了pc並口協議( epp )與dsp之間的通信方法、 cpld模塊邏輯控制應用和arinc429的通訊規范的基礎上,給出了基於dsp的arinc429通訊介面的設計方案:對通訊板中各模塊的功能和應用以及構成數據轉換主體的總線介面晶元hs - 3282的工作原理做了說明;介紹了本設計所用的dsp和cpld的功能概況;詳細敘述了通訊板介面模塊的硬體結構設計,其中,對數據緩沖電路、數據傳輸速率選擇電路、邏輯控制電路等各關鍵點做了重點介紹;具體闡述了軟體設計思想及流程圖,包括軟體的基本要求和功能的設計與實現;接著從埠譯碼單元、 i / o通道、電平轉換電路等方面進行了介面模塊的軟、硬體調試;最後,給出了測試結果,對研製工作做了總結,對本設計的優缺點各做了評述。Wireless mobile ad hoc network is composed of mobile terminal nodes with wireless communication device, and typically characterized by its temporariness, multi - hop and no - center. it has an infrastructureless distributed mufti - hop structure ; all nodes have an equal status and act as two roles - router and node itself
無線移動adhoc網路是由一組帶有無線通信收發裝置的移動終端節點組成的一個多跳、臨時、無中心網路,網路中各個節點的地位平等,每個節點都具有主機與路由器的雙重功能,形成了一個以中間主機節點為中繼的、多跳的分散式網路結構。It can support data transform between ethernet networks, and equipment with rs232, rs485 and usb interfaces. we can real izc point - to - point communication, exploit wireless local area network which has the function of point - to - multipoint communication based on this platform
不但可支持ethernet網路之間的數據傳輸,具有rs232 、 rs485 、 usb等介面能力,還實現了點對點的無線通信,可以開發具有點對多點通信功能的無線局域網。Then, after the depiction of the network architectures of umts and utran, the five synchronization issues in utran, including the " network synchronization ", " node synchronization ", " transport channel synchronization ", " radio interface synchronization " and " time alignment handling ", are discussed in detail
然後在簡要介紹了第三代移動通信系統及其陸地無線接入網的網路結構之後,較為深入的研究了utran中的網同步、節點同步、傳輸通道同步、無線介面同步和時間對齊處理等五種同步問題。As various kinds of technology including computer, communication, control and cathode ray tube ( crt ) developing quickly, measurement & control network ( mcn ) tends towards networking, distributing, opening and interoperating, which is widely applied in many fields such as industry automation, intelligent building, processing control, etc. firstly, this paper makes a detailed study on the prevalent field control systems ( fcs ), including the characteristics of structure & technology and advantage, introduces several popular field buses, designs the model of field control system, and puts forward three effective methods to integrate between the mcn & information network under different situations
計算機技術、控制技術、通信技術、圖形顯示技術和計算機網路的迅速發展,推動著測控技術向網路化、分散式、開放性和互操作性的方向發展,它被廣泛應用於工業自動化、智能大廈、過程式控制制等領域,大大提高了生產效率與經濟效益。本文首先分析了當前流行的fcs網路的結構特點、技術特點和優勢,介紹了幾種較為流行的現場總線,構建了企業生產的。 fcs網路模型,並提出了在控制網路和信息網路之間加入轉換介面、採用dde技術和使用統一的協議標準三種集成方式。9 cheng wei lee, li ming chen, meng chang chen et al. rm a framework of handoffs in wireless overlay networks based on mobile ipv6. ieee journal on selected areas in communications, nov. 2005, 23 : 2118 - 2128
在wlan之間的水平切換中,移動節點上的無線局域網介面nic在檢測到一個新ap的信號更強時,會自動啟動一個鏈路層切換,將自己連上新ap而後mn將會從新ap處收到ra通告,隨后將觸發基於移動ip的網路層切換。Because localization of vrml2. 0 on moving functions and more embodiment of vitality and reality, i use java language. bcause it has points of mutuality, safety and credibility, smallness and agility, facing object, distributed network communications, multithreading and so on, and makes up difference between bandwidth and m anagement ability, and transmitts rich and colorful and alternant media on actual bandwidth condition
由於vrml2 . 0版本語言在運動功能上的局限性,同時也為了更好體現逼真性、生動性的特點。我引入了java語言。由於它具有廣泛移植性,面向對象,交互性,分散式的網路通信,安全可靠,小巧靈活,多線程等一系列優良性能,同時彌補了帶寬與處理能力之間的差距,可在當前的帶寬狀態下傳送豐富多彩及互動式媒體。According the cpci specification, the routing method of the pci and non pci signals is presented bridging the resources of the manager and the resources of the peripheric module
在cpci規范的基礎上,重點分析了pci的各種信號和非pci信號的路由和處理方式,在pxi總線自動測試系統的模塊資源和控制者資源之間建立了可靠的通信通道。The present dissertation is based on an automation revamping project in which the latest fieldbus control system ( fcs ) and control network techniques of mitsubishi electric are adopted, in a paint - coating workshop of chang ' an automobile company, chongqing
作為近年來國際上迅速發展起來的、備受關注的控制網路新技術,現場總線是一種應用於生產現場、在微機化測量控制設備之間實現開放式、雙向串列多節點數字通信的底層控制網路。Abstract : fieldbus is a kind of full digital, bidirectional and multi - station communication systems between field instruments and control room systems in industry. it is a convergence of three developing technologies which are processing control technology, industrial automation instrument technology and computer network technology. with this leading technology a renovation will occur in control systems
文摘:現場總線是工業中用於現場儀表和控制室系統之間的一種全數字化、雙向、多站的通信系統,是過程式控制制技術、自動化儀表技術、計算機網路技術三大技術發展的交匯點,將帶來控制系統一大變革。分享友人