收發信單元 的英文怎麼說

中文拼音 [shōufāxìndānyuán]
收發信單元 英文
transmit-receive unit
  • 收 : Ⅰ動詞1 （把攤開的或分散的事物聚集、合攏） put away; take in 2 （收取） collect 3 （收割） harvest...
  • 發 : 名詞（頭發） hair
  1. 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。
  2. The clock recovery block of usb2. 0 transceiver macrocell consists of phase locked circuit, such as pll and dll ( delay locked loop ). this block use external crystal 12mhz sin signal to produce 60mhz, 120mhz, 480mhz clock signal, and can recover colock signal form date wave. it can support 480mbps ( hs ) and 12mbps ( fs ) word speeds as defined in usb2. 0 specification.

    目的是用鎖相環電路? pll和dll （延遲鎖相環）實現usb2 . 0收發器宏單元utm的時鐘恢復模塊。其中pll環路構成的時鐘發生器將外部晶振的12mhz正弦信號生成60mhz 、 120mhz 、 480mhz等本地時鐘信號。 dll環路依據本地時鐘信號對外部數據信號進行時鐘恢復。
  3. When the cur - cuit resets, the chip remains accepting state, works in burst mode, and adopts dpsk modulation mode. it proceeds quadrature - sampled intermediate frequency signal after the ad9057 has converted, then down - converses, despreads and demodulates. the demodulated baseband signal will be sended into scm to dispose through interrupt

    上電復位后，晶元處于接收狀態，工作在突發模式下，採用dpsk調制方式，將ad9057轉換完的中頻信號進行復正交取樣後下變頻、解擴、解調，通過中斷將解調完的基帶信號送入單片機處理；處于發送狀態時，可將數據擴頻、調制，經ad9768送出。
  4. Since the reform, budget accounting system have been revised many times however, with the development of socialist market economy system, the budget accounting environment is changing rapidly, government turn to offer public product and adjust market ; the range of the financial revenue and expenditure are diversified, the user of governmental accounting information expand constantly, the requisition of the governmental accounting information improves etc. it is inevitable for the revolution of budget accounting to enhance our government performance and establish modern government managerial system. we should draw lessons from international reform experiences and take the china - style road - the " stage - by - stage - going " way of the reformation

    但是，隨著社會主義市場經濟體制的發展，我國預算會計環境正在發生重要的變化：政府和市場在社會經濟運行中的分工逐步明晰；政府職能重點轉向公共品提供和宏觀調控；財政收支的內容和形式更加多樣化；近年實行的部門預算編制、國庫集中收付制度和政府采購制度等預算管理制度方面的改革；事業單位資金來源渠道多元化和經營性業務的增加；政府會計信息使用者的范圍不斷擴大，對政府會計信息的內容和質量的要求不斷提高等。
  5. This paper mainly focuses on the noise limiting by means of the direct sequence spread spectrum ( dsss ) and the analysis of the transmission performance of the plc and some digital modulation technology. the contents of the paper is as follows : 1 ) the technical feasibility is proved after simulating noise limiting principle of dsss by means of systemview, the simulation software ; 2 ) a kind of band pass filter ( bpf ) is realized according to the requirement of filter and the principle of butterworth approximation, which satisfies the index of performance of dsss. 3 ) the low voltage plc system includes the sc1128, the specific modulation / demodulation ic, the bpf filter and other circuit components, furthermore, the control function of system is realized by means of the personal computer and the microcontroller

    本課題在對低壓電力線的傳輸特性和數字調制技術進行分析的基礎上，將通信理論中的直接序列擴頻技術（ dsss ）用於解決低壓電力線通信的干擾問題，主要研究內容如下： （ 1 ）用通信模擬軟體systemview對dsss技術的通信和抗干擾原理進行模擬分析，分別對時域和頻域下採用dsss技術前後接收信號的頻譜進行分析，驗證dsss技術在本系統中的可行性； （ 2 ）由dsss技術對濾波系統的要求，根據濾波理論分析了巴特沃思型濾波器的逼近原理並設計了合適的濾波電路； （ 3 ）用調制解調晶元sc1128和自行設計的濾波器加之輔助外圍電路，構造出低壓電力線載波通信系統，並採用atmel公司的單片機設計了接收和發射電路的微控制器； （ 4 ）分別對採取抗干擾措施前後輸入和輸出信號進行對比實驗，並對結果進行分析，驗證了dsss技術對干擾信號的抑制作用。
  6. Then we introduce the character of the atmosphere channel, which we emphasized on the atmosphere scatter, absorption and scintillation ' s effect on the laser beam. in chapter, we explain why we used cassegrain telescope to collect the optical signal at first, then the lightsource, detector, front amplifier used in optical communication has been compared to that of fiber communication, the noise including shot noise, thermal noise and background light noise has been explained here for analysis the snr and ber in the next section

    在第三章介紹無線光接入系統的光收發單元，採用多孔徑卡塞格倫式的收發天線對消除減小大氣湍流影響有較大作用，針對大氣通道的特點無線光系統收發單元在光源、光探測器、前置放大電路上存在許多有別于光纖通信的技術，同時還闡述了光接收機包括背景噪聲的噪聲機制和接收靈敏度、誤碼率等指標，最後給出了一個整個傳送鏈路的功率預算。
  7. In the third chapter, it was particularly analyzed the impact of the correlation between antenna arrays both sides of transmit and receive, the coexistence of line of sight ( los ) component and scatter power component in the radio propagation environments, and known and unknown channel state information on the capacity of mimo channel. the related simulation results are also given

    第三章著重分析了收發兩端的多天線單元之間存在相關性、同時存在直射分量（ los ）和散射分量的傳播環境、已知和未知通道的狀態信息等因素對mimo通道容量的影響，給出了有關模擬結果。
  8. Transceiver baseband unit tbu

    收發信機基帶單元
  9. Arranged signal activating lock circuit and time - base control circuit in the sound wave receiving circuit to take the initial signal of back wave as the valid one in the cycle, thus to improve the ratio of signal vs. noise and detective precision

    在超聲波接收電路中設有信號觸發鎖定電路和時基控制電路。實現以各探頭中最早收到的回波信號為本檢測單元的有效信號，有效提高信噪比和檢測精度； 4
  10. Why do such a new system give much help in poverty reduction in the developing countries ? this paper give us some new advice on micro - credit of our country by discussing the development processes of micro - credit worldwide and the practice of our country : 1 、 our institution of micro - credit should find enough public capital to make it better than the traditional institution that only relying on the state finance or donative capital, in one word, there is about 950 billion $ underground in our country. we should manage to attract so these capital to attend in poverty reduction, in another word, much capital that deposit in the post saving institution and the rural credit institution have outflow away the rural region because of lacking of investing channels

    本文主要在考察世界范圍內小額信貸的產生與發展過程，並從中汲取經驗，結合我國小額信貸的運作實踐，為我國的小額信貸的進一步擴展提出了一些新的看法:我國小額信貸必須突破現有的依靠捐助資金或財政補貼運作的單一資金渠道來源的運作方式，想方設法從民間獲得機構持續發展的必需資金，在我國，一方面存在著大量的地下金融活動，約有大約9500億元的資金，這是我們可以動員的資金，使它們參與到小額信貸中來，而另一方面，在我國由於缺乏正規的投資渠道，才會有如此巨大的資金存在於正規金融體制之外，而且，我國農村正規金融機構農村信用社，從農村吸收的儲蓄存款，由於難以在農村尋找合適的信貸項目，大量資金流出農村，郵政儲蓄機構同樣存在這樣的情況，這些都是農村發展中的資金瓶頸形成的因素。
  11. The paper designs a type of circuit which combines gps receiver with computer by means of the icl232 integration chip. it achieves deliver and receiver at the same time. it gives receiver program chart

    採用icl232單電源集成電路晶元設計gps接收機與微型計算機介面電路，可以同時實現發送和接收信號的電平轉換，並給出了接收的流程圖。
  12. On the basis of collecting and processing many datum and materials. firstly. this paper analyzes main activities and cost constitutions of each stage of the life cycle of a fcs, and lay a foundation for later analysis and evaluation of system lcc. secondly, a basis method and usage range for estimating the system lcc are introduced. a multivariate linear regression model of pcs development cost and cost driven factor is built by use of the parametric method and supplies the base of cost estimation of newly - developed systems. thirdly, combine actual examples and make statistical analysis of lcc of a certain pcs developed by our institute, predict unhappened usage and service cost with grey prediction method, obtain proportion of each constitute to the lcc. forthly, according to actual conditions, use the fuzzy theory to overall evaluate efficacy of the fcs, fifthly, combimng our actual conditions, investigate specific measures of how to implement the life cycle cost management in our institute and put forward a new conception of developing web - based flight control system lcc management information system with pdm as the platform. at last, investigate important factors such as reliability and maintainability that may affect the life cycle cost of the fcs in detail, and put forward specific methods of lowering the life cycle cost of the fcs

    論文在收集和整理大量資料的基礎上，首先深入分析了飛控系統壽命周期各階段的主要活動以及各階段的費用構成，為以後系統壽命周期費用的分析和評價奠定了基礎；其次，介紹了壽命周期費用估算的基本方法和使用范圍，並利用參數法建立了飛控系統研製費用與費用驅動因子的多元線性回歸模型，為新研系統的費用估算提供了依據；第三，結合實例對我所研製的某型飛控系統的壽命周期費用進行統計分析，運用灰色預測方法對未發生的使用及維修費用進行預測，得出了該系統的壽命周期費用以及各組成部分所佔比例；第四，根據實際情況，首次運用模糊理論對飛控系統的系統效能進行了綜合評價，構造了飛控系統系統效能模糊綜合評價模型；第五，結合我所實際，探討了如何在本單位實施加強壽命周期費用管理的具體措施，提出以pdm為平臺，開發基於web的飛控系統lcc管理信息系統的新構思；最後，對影響飛控系統壽命周期費用的重要因素如可靠性和維修性等進行了詳細地研究，提出了降低飛控系統壽命周期費用的具體方法。
  13. Dsp56f805 samples the ultrasonic pulse coming back from the target, then measures the distance and shows it on led. tms320vc5509a is accomplished the detecting speed and the main control of the radar system, is 16 fixed dsp with high performance and low power produced by ti company. dsp5509a samples the wave coming from t / r module, then measures the target ’ s speed and send this information to the assistant control chip - p89v51 based on boost c51 core mcs produced by philips company, which controls the lcd

    測距雷達系統的控制和信號處理的核心晶元是motorola公司的dsp型16位單片機56f805 ，由它對超聲波回波脈沖進行ad采樣后，計算目標距離並在七段數碼管上顯示。測速雷達系統中信號處理的核心晶元是ti公司的超低功耗、高性能的16位定點dsp ? ? tms320vc5509a ，由它對收發組件輸出的多普勒回波進行采樣，計算出目標運動速度后，送給輔助控制晶元? ?飛利浦公司生產的基於c51內核的增強型單片機p89v51 ，並且在液晶顯示器上顯示速度信息。
  14. Advanced fpga technology is introduced to improve the integration of digital circuits, and all digital circuits in the original module are integrated in the fpga chips, which could not only reduce the cost, but also improve the reliability and measurement precision of the circuits. high speed digital signal processor ( dsp ) is selected as the coprocessor instead of scm ; it can receive all kinds of commands sent from vxi, analyze and execute the commands, harmonize each section of the module and process the data. higher - conversion - speed comparator chip is adopted to convert the input signals being measured into square waveform signals which could be identified by fpga chip ; it can expand the measurement range of frequency dramatically

    本文在原有vxi總線四通道計數器模塊的設計基礎上，通過對原模塊缺陷的分析，採用一些新的技術和新的電子器件來重新設計該計數器模塊:採用最新的fpga技術來提高數字電路的集成度，將原模塊中的所有數字電路全部集成在fpga晶元中，這樣不僅能節約成本，還能提高電路的可靠性和測量精度;採用高速的數字信號處理器（ dsp ）取代原有的單片機作為協處理器，來接收vxi發來的各種命令，分析命令、執行命令、協調模塊各部分的工作以及對數據的處理;採用轉換速率更高的比較器晶元將輸入的被測信號轉換為fpga晶元能夠識別的方波信號，能極大提高測量頻率的范圍;採用d / a轉換晶元和隔離運算放大器得到隔離通道所需的比較電平，該比較電平值能夠根據實際需求進行設置，能增強模塊的使用靈活性。
  15. This stage will lay base for next stage. the third stage is relatively deeper stage of subject research based on textbook, the stage will be characterized by the process of selecting subject - collecting and handling information - writing paper - exchanging - evaluation. research can be carried out by the means of finding subject from note, details of textbook, after - class exercise, whole textbook and several text unit

    第三階段是從教材出發進行的較深層次的課題研究階段，這一階段已開始明確以選題? ?收集、處理信息? ?撰寫小論文、表達交流? ?評價為教學過程，可採用從注釋、教材細節、課后練習題、整篇課文、幾個單元課文中發現課題的方法進行研究。
  16. The industrial computer mainly implements the functions of long - range supervision and management it includes : dynamic show of technics flow, real time data acquirement and show, history data save and print, fault alarm, etc ; the plc control system mainly accomplishes the wastewater technics flow control, harmonizes the logical relationship among local intelligent control instruments and transmits the state of each local equipment to the industrial computer, simultaneously, the plc control station receives the control commands from the industrial computer ; the local intelligent units take charge of the correlated parameters " measure > disposal and control, and it will transmit the related parameters to the computer, etc. in this thesis, introduced municipal wastewater treatment technics, the integrated application program development of computer, the design method of plc control station, the communication between plc control system and computer, and the network of wastewater treatment with industrial ethernet was also discussed

    上位計算機主要實現遠程監測和管理功能，具體包括：工藝流程動態顯示、實時數據獲得及顯示、歷史數據存儲與列印、故障報警等功能； plc控制系統主要完成工藝流程式控制制以及協調現場各智能儀表之間的邏輯關系，將現場各設備的運行狀態通過通訊網路傳輸到上位計算機，並接收上位計算機的控制指令；現場各智能儀表單元負責各相關參數的監測和處理、控制，並將有關參數送往上位監控計算機進行處理、保存等。本論文介紹了城市污水處理工藝、上位監控計算機的綜合應用程序開發、城市污水處理自動控制系統plc控制站的設計和採用工業以太網技術的污水處理通信網路。
  17. The main assignments are : accomplished the design of transmitter, receiver, coder and decoder module, control system of obu and rsu. the communication protocol and the main factors which would influence the communication are also discussed

    主要工作內容為:完成了車載通信單元和路側通信單元光發射機、接收機、編碼解碼模塊以及控制系統的設計，並討論了通信協議的相關內容和影響通信的主要因素。
  18. And software method can resolve d channel ' s work for its less data communication ; 3 ) cpu 80c152 is synchronized with mc145572 by a simple synchronous circuit, avoiding the complex fpga interface circuit ; 4 ) data transmission use dma, which reduces the delay of data transmission and cpu occupying ; 5 ) 8bit software look - up table method can achieve 16bit crc quickly, which reduces the resource of both hardware and software

    對通信數據量相對小的d通道，採用軟體實現裝幀與解幀。第三，採用結構簡單的外部同步時鐘電路實現80c152和接入晶元mc145572的同步傳輸，巧妙地避開了復雜的fpga介面電路。第四，利用dma技術完成數據快速收發，降低了數據傳輸時延及cpu佔用率。
  19. When the gsm based gate - way is designed and realized, the paper emphasizes the short message communication technique used in transmitting location data, involves short message actualization unit, protocol configuration, receiving / transmitting process, data pdu encapsulation, data coding, and so on

    在系統gsm通信網關的設計與實現中，重點對系統中採用的短消息數據傳輸技術做了詳細的分析，包括短消息的實施單元、協議結構、收發過程以及信息傳輸過程中數據的pdu封裝等。
  20. Based on the analog vhf radios transmit / receive principals, chapter 4 illuminates simply the rf module, if digital module, and audio modules about the " zx08 " project, focused on the hardware design of the digital signal process chip " tms320vc5410 " and introduction of the audio module

    在介紹超短波模擬電臺收發原理基礎上，第四章對zx08項目中的射頻模塊、中頻數字化模塊、音頻模塊進行簡單的說明，重點是項目中的數字信號處理晶元tms320vc5410硬體設計和音頻部分的介紹。
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