寬頻帶技術 的英文怎麼說

中文拼音 [kuānbīndàijìshù]
寬頻帶技術 英文
broad band technique
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  • 技 : 名詞（技能; 本領） skill; ability; trick; technique
  • 術 : 術名詞1. （技藝; 技術; 學術） art; skill; technique 2. （方法; 策略） method; tactics 3. （姓氏） a surname
  • 寬頻 : bisdn
  1. With the rapid development of the semiconductor technology, large of the vacuum electronic device has replaced by the semiconductor element from the middle period of the last century. however, the vacuum electronic device owns tremendous prepotency in the exceed - high frequency and wide frequency band and high power field, especially in the exceed - high power field. the complexion won ’ t be changed for a long period

    自上世紀中後期開始，隨著半導體技術的飛速發展，許多真空電子器件逐步被半導體器件取代，但是，在超高頻、寬頻帶、大功率，尤其是超大功率領域，真空電子器件在技術和經濟方面至今仍擁有巨大的優勢，而且在今後相當長的時期內，這種局面也不會改變。
  2. From the middle - later period of the last century, with the rapid development of the semiconductor technology, large of the vacuum electronic device was replaced by the semiconductor element. however, the vacuum electronic device owns tremendous prepotency in the exceed - high frequency and high power field. this complexion won ’ t be changed for a long period

    自上世紀中後期開始，隨著半導體技術的飛速發展，許多真空電子器件逐步被其取代，但是，在超高頻、寬頻帶、大功率，尤其是超大功率領域，真空電子器件在技術和經濟方面至今仍擁有巨大的優勢，而且在今後相當長的時期內，這種局面也不會改變。
  3. This paper starts the research of the liquid floated pendulous accelerometer testing system according to the engineering. at first, this paper gives the brief introduction of the history and present status of accelerometer and its testing technology, the working principium and math model of the liquid floated pendu - lous accelerometer, and then, decides the binary width pulse force retrim loop as the design proposal of testing system, researches the transfer function of every part in the system emphasizly, analyses the stability of the whole accelerometer testing system from the angle of control theoretics by the open loop transfer function of system, and designed the correcting net, analyses the basal problems such as resolution, sampling restraint, precision and so on, designs the hardware testing circuits such as preamplification, band - pass filter, alternating amplifier, phase sensitive demodulatorn, pulse - width modulation, frequency scale circuit, moment current generator. finally, using the graphics program language labv - iew which is designed for testing field especially by ni accomplishes the solfware design of testing system, realized the testing functions

    首先對加速度計及其測試技術的發展歷史和現狀，液浮擺式加速度計的工作原理和數學模型等作了簡要的介紹，然後確定了以二元調寬脈沖再平衡測試迴路為設計方案，並從控制理論的角度進行了分析，著重研究了系統中各部分的傳遞函數，利用系統開環傳遞函數分析了系統的穩定性，同時設計了系統的校正網路;分析了二元調寬脈沖再平衡測試迴路的解析度、采樣約束以及測試精度等基本問題，並按照系統分析的結果設計了包括前置放大、帶通濾波、交流放大、相敏解調、脈寬調制、頻標電路以及力矩電流發生器等測試系統各部分硬體電路，驗證了電路的正確性，最後按照測試系統的要求，採用了美國ni公司專為測試領域所開發的虛擬儀器工具? ? labview作為測試軟體開發工具，利用該圖形化編程語言完成了測試系統軟體部分的設計，實現了測試功能。
  4. Duo to the intrinsic characteristics of the gaas material, serai - insulating ( si ) gaas photoconductive semiconductor switches ( pcss " s ) have more obvious advantages in the performance of both high power and ultra - fast switching than those pcss " s made of other materials and then can be widely used in ultrahigh speed electronics, field of high power microwave generation and pulse forming ( pulse sources of high power ultra - fast electromagnetism, ultra - wide - band microwave generator )

    半絕緣gaas光電導開關（ photoconductivesemiconductorswitches簡稱pcss ' s ）具有兼備寬頻帶和高功率容量特性，使其在超高速電子學和大功率脈沖產生與整形技術領域（大功率亞納秒脈沖源、超寬帶射頻發生器等）具有廣泛應用前景。
  5. The former includes vod, remote medicine, virtual shop, electronic shopping, etc. currently, it is possible to provide broadband multimedia service from the perspective of technology. however, there will be some time to go before it becomes popular, for subscriber access needs a relatively large bandwidth and the rent of circuits is relatively high

    寬帶多媒體業務如vod （視頻點播） 、遠程醫療、虛擬商店、電子購物等。從技術角度來看，提供寬帶多媒體業務，目前雖已具備現實可能，但尚難普及。究其原因是用戶接入要有比較大的帶寬，而電路租費比較高。
  6. 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。
  7. Information technology - telecommunications and information exchange between systems - broadband private integrated services network - inter - exchange signalling protocol - signalling atm adaptation layer

    信息技術.系統間通信和信息交換.寬頻帶私人綜合服務網.內交換信號協議.信號atm適應層
  8. Time service is a important content in seismic observation. measure precision of time - synchronization effects the quality of recording

    本文給出了一種應用在寬頻帶地震記錄儀中基於gps授時信號的時間同步技術。
  9. In modern wireless communication, high linear broadband amplifer is necessary and play a critical role, and even the whole communication system will be affected by its performance

    隨著當代無線技術的發展，微波寬頻帶放大器已經成為無線通信系統的關鍵組成部分，其性能好壞將影響整個通信系統的性能。
  10. Theoretically several solutions are derived in the final scheme such as broadband matching technology which included negative - feedback technology, traveling wave technology and balance technology. in addition, the design will be optimized by eda software and the final test result indicates that our design is successful. the principle of microwave amplifier is introduced at first in this paper, especially its main parameters index sign, then the material performance and the influence of parasic parameter and model setting of the gaas phemt is discussed

    文中首先介紹寬頻帶放大器的主要參數指標，接著介紹了gaasfet的材料特性，以及phemt管芯寄生參數對實際放大器設計的影響，然後討論gaasphemt的大、小信號模型的建立與分類;結合gaasphemt模型和s埠參數分析了寬頻帶匹配技術的原理;最後論述本課題中各個放大器實現的具體方案，以及在放大器實現過程中應該注意的問題，給出了實際寬帶放大器的測試結果，並將軟體模擬結果與實測曲線進行對比。
  11. The author ? major contributions are as follows. 1. with the performance requirement ( the pattern of the antenna, the rang of scanning angle, the maximal sidelcbe level and the beam ~ vidth ) givcn, a method is presented to determine the basic parameters of a serpentine feed, which includes the distance and ~ vaveguide length bet ~ veeii t ~ vo couplers, the size of the arrays and the number of components

    根據天線的工作頻帶、掃描范圍、副瓣電平、半功率寬度等技術指標要求，給出了確定波導慢波線基本結構尺寸的計算公式，即對相鄰單元之間的空間距離、耦合器之間的饋線波導長度、陣列的大小和單元數的計算。
  12. By means of using the electronically tuned preselector and multiple conversion technology, a wide band receiver with wide dynamic range is basically achieved. the scheme is innovative and original not only in the scheme itself but also in the technology of some sub - circuits

    課題採用電調選頻和多次混頻的方案基本實現了大動態寬頻帶接收，該方案無論是方案本身還是方案中所涉及到的技術都具有一定的創新與獨到之處。
  13. Meanwhile, an efficient method, impedance matrix interpolation, is described. the impedance matrix is calculated at relatively large frequency intervals and interpolated to approximate its values at intermediate frequencies

    同時，在計算寬頻帶電性能參數時，引入了一種有效而快速的方法?阻抗矩陣插值技術。
  14. Some novel technologies are also proposed, such as two dimensional spread spectrum ( 2d - ss ), self - encoded spread spectrum ( sess ), multiple input multiple output ( mimo ), orthogonal frequency division multiplexing ( ofdm ) and so on

    另外，對目前新興的一些抗干擾技術，如二維擴頻、超寬帶、多天線、自編碼擴頻等技術也做了簡單分析。
  15. Digital down - converter ( ddc ) is one of the key technologies used by sdr receiver. the ddc module is a data processing part, following the ad sampler. the main function of ddc is extracting narrow - band data from broad - band data which is digitalized by ad sampler, down - converting these data to base - band, and decreasing data rate as well

    Ddc數字下變頻器技術作為軟體無線電中的核心技術，是緊跟在ad采樣后的一個處理模塊，他的主要功能是從輸入的寬帶高速數字信號中提取所需的窄帶信號，將其下變頻為數字零中頻，並降低數據的速率。
  16. The results show that the frequency band extension technology using digital deconvolution has feasibility

    研究結果說明數字反卷積展寬數字系統頻帶技術是可行的。
  17. The test result indicates that the vivaldi antenna has better radiation performance that accords with the theory analyses frequency domain on 3. 1ghz

    測試結果表明，該天線在3 . 1ghz 10 . 6ghz頻段內得到比較滿意的輻射性能，實現了超寬帶技術要求，與理論分析吻合較好。
  18. So, the test technique can be used for the automatic, rapid, accurate, broad - band and measurement of material parameters of low - loss dielectric materials, and it is very practical

    因此，本文研製的測試技術可對微波低損耗介電材料的介電參數進行迅速、準確、可靠、寬頻帶、自動化檢測，具有較強的實用性。
  19. With the phenomenal prevalence of the intelligent communities and the rapid development of broadband access technologies, a variety of broadband technology based applications are becoming familiar to people day by day. video on demand system is the typical case among those applications

    隨著智能化住宅小區的普及和寬帶網路接入技術的發展，各種基於寬帶技術的應用服務也日益被人們所熟悉， vod視頻點播是目前最關鍵的應用之一。
  20. In data communications, a high bandwidth channel

    數據通信技術中，一種寬頻帶的通道。
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