超高頻通信 的英文怎麼說

中文拼音 [chāogāobīntōngxìn]
超高頻通信 英文
uhf communication
  • 超 : Ⅰ動詞1 （越過; 高出） exceed; surpass; overtake 2 （在某個范圍以外; 不受限制） transcend; go beyo...
  • 高 : Ⅰ形容詞1 （從下向上距離大; 離地面遠） tall; high 2 （在一般標準或平均程度之上; 等級在上的） above...
  • 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...
  • 通 : 通量詞（用於動作）
  • 高頻 : high frequency
  • 通信 : communication; communicate by letter; correspond
  1. Mixers are the key components of many microwave and millimeter - wave systems. the super - heterodyne receiver is always applied in modern communication system, mixer becomes the key component as is at the first part of system. but it is more and more difficult to get the choiceness lo source of the same band with the system is working at high frequency especially in the millimeter - wave. sub - harmonic mixer is a good solution to this problem now. in this circuit we need just half 、 quarter 、 even 1 / 8 of the rf signal frequency. in this paper the design and fabricate of sub - harmonic hmic mixers ( 2, 4 ) at w - band are introduced

    混頻器是微波通信、射電天文學、雷達、等離子物理、遙控、遙感、電子對抗，以及許多微波測量系統中至關重要的部件。在現代通信系統中，毫米波頻段通常採用超外差接收機，混頻器作為第一級就成為關鍵部件。由於在毫米波頻段，同頻段高性能的本振源成本高，技術難度大，採用分諧波混頻技術是解決此問題的有效途徑，只需射頻頻率1 / 2 、 1 / 4甚至1 / 8的本振頻率即可實現混頻。
  2. Based on an analysis of uhf ( ultra - high - frequency ) characteristic of pd ( partial discharge ) in power transformer, using mixing technique, a signal disposal cell has been devised for the sake of facilitating common data sampling card

    摘要在分析了電力變壓器局部放電的超高頻特性的基礎上，利用混頻技術，設計了局部放電超高頻信號的信號調理單元，方便普通數字採集卡採集。
  3. The transducer made by this research not only has the feature of measuring high precision and good currency, but also the mini volume and light weight, convenience to take, it is suitable for the scale and analysis of ulf absolute vibratory signal in production

    根據這種方案研製的傳感器系統不僅測量精度高、通用性好，而且體積小重量輕，攜帶方便，適合在生產現場對超低頻絕對振動信號進行測量與分析。
  4. 1 m 0. 5, the phase - shifted angle 6 is controlled in term of sine law which makes the magnitude of resonant voltage track a reference sine voltage, and the resonant voltage is rectified, filtered, inverted and then the better sine - voltage output is obtained, theoretical analysis and experimental results show that for the resistive load and inductive load, the switches of leading leg of the phase - shift - controlled circuit are always turned on at zvs, and ones of lagging leg are turned on at zvs ( < 0 ) or turned off at zcs ( ( > 0 ), moreover, all switches in the low - frequency inverter are always turned on and off at zvs, the measured circuit efficiency for rated load reaches up to 88 %

    從功率單向流動角度出發，提出了一種lcc諧振型恆頻移相單相高頻鏈逆變電路拓撲，在調制系數0 . 1 m 0 . 5情況下，控制移相角按正弦規律變化，使諧振電壓脈沖列的幅值追蹤參考正弦電壓信號，經過整流、濾波、低頻逆變，從而獲得正弦度較好的輸出電壓。理論分析和實驗結果證明對于阻性負載或阻感性負載，移相全橋具有超前橋臂零電壓開通，滯后橋臂或者零電壓開通（ _ 0 ）或者零電流關斷（ _ 0 ）的軟開關特性，而低頻逆變器的各個開關均實現零電壓條件下的開通與關斷。
  5. The actively mode - locked erbium doped fiber laser is very attractive among those potential sources which can generate broadband tunable near transform - limited pulse with high repetition rate and has been used as the ideal optical transmitter and all optical clock source in the future long - distance communication systems

    對于高速光纖通信系統而言，能輸出高重復頻率的、近極限超短脈沖的主動鎖模光纖激光器被認為是未來遠程無中繼光纖通信系統的理想光源。但其難點是工作穩定性問題。
  6. Aiming at the key component, through analyzing the time domain and frequency characteristic of acceleration vibration signals and force signals, this paper attempts to find the infection factors of grinding vibration and to optimize the grinding parameters, which is based on ultra - high speed surface grinding experimentation

    摘要以關鍵部件為研究對象，通過在超高速磨削實驗臺上進行磨削工藝試驗，對比不同參數下加速度振動信號和磨削力信號的時頻特徵，分析了磨削過程振動特性及其各種影響因素，提出磨削工藝參數優化方案。
  7. And some useful rules are concluded from these experiments. the pd signals on different frequency scopes are surveyed, and the thesis explores anti - noise narrowband detection of partial discharge signals. for the first time the thesis brings forward the choosing - frequency detection of pd ground on the radio frequency communication

    同時，進行了局部放電不同頻段信號檢測，為窄帶抗干擾檢測技術奠定基礎，並首次提出基於射頻通訊原理的選頻檢測原理及檢測設想；在實驗室中進行了局部放電超高頻信號的檢測，驗證了超高頻法檢測局放信號時對空間電暈干擾的抑制作用。
  8. Over - the - horizon radar ’ s beam - frequency is high frequency band and its wavelength is so long that the annate ’ s characters are very complicated when applicated on the ship. the character of coupling between cells and the environment must be measured to compensate in the radar signal process step. the ship - based over - the - horizon radar uses cfa ( crossed field antenna ) as array antennas ’ cell

    艦載超視距雷達使用高頻信號作為發射頻率，其波長較長，在艦船有限的空間內，陣列天線的陣元之間的耦合與陣元與背景之間耦合都十分嚴重，必須測量陣列天線通道的幅相一致性，作為雷達信號處理的補償參數。
  9. The proposed method only needs to nansfer a scalar signal and provides higher security due to the use of hypemhaos

    提出的擴頻保密通信方法不僅只需傳遞一個標量信號，而且由於採用了超混沌系統，所設計的擴頻通信系統具有更高的保密性。
  10. Harmonic analysis can be produced in as little as 10 milliseconds, or measurements may be integrated over more than a day. the user may set any measurement interval, perform synchronous averaging on harmonics, and even perform full spectrum analysis to detect non - harmonic signal content. the system s main processor controls all display, data storage and i o functions, thus allowing each channel to perform its analysis at maximum speed

    在每通道雙數字信號處理器結構中，結果形成超快速諧波分析，諧波分析可於至10毫秒產生，或可綜合測量超過一天，用戶可設定任何測量區間，執行諧波同步平均，及進行全頻譜分析從而探測非諧波信號內容，系統的主微處理器控制全部顯示數據儲存與i 0功能，故使各通道可於最高的速度下進行分析
  11. ( 2 ) an analog - digital channelized receiver is given. two key techniques of this receiver, including how to achieve data conversion effectively and frequency estimation precisely, are introduced briefly. the change of channelized lfm signal is discussed

    給出了一種目前可實現的模數混合通道化接收機方案，簡要介紹這種接收機的關鍵技術? ?高效的數據率轉換以及超寬帶線性調頻信號測頻演算法。
  12. A gis pd measuring system is established, including a conventional pd measurement system, uhf detecting system and a pd spectrum system. we can obtain pd signal characters by this system, such as uhf transient signal waveforms, uhf demodulating signal waveforms, the pd phase angle in ac, pd spectrum, and discharge quantities

    建立了gis局部放電測量系統，其中包括：常規局部放電測量系統、超高頻檢波測量系統和放電頻譜測量系統等，通過測量系統得到了gis內局部放電的超高頻暫態信號波形、檢波信號波形、工頻相位分佈、頻譜特徵以及常規視在放電量等特徵。
  13. Frequency - hopping ( fh ) is a novel spread spectrum communication technique, which develops very fast in military field due to its lpi / lpd ( low probability of intercept / detection ) properties and immunity against interferences, the extensive application of hf / vhf ( high frequency / very high frequency ) frequency - hopping radios in military has greatly enhanced the ability of military equipments against jamming and interception and ensure the safety and validity of chain of military command

    跳頻技術是擴頻技術的一種，是80年代以來出現的一種新的通信方式。跳頻通信具有良好的抗干擾性，低截獲概率及組網能力，因此跳頻技術的一出現，便在軍事領域得到了極大的發展。採用跳頻技術的短波超短波電臺在軍事通信中得到了廣泛應用，極大地提高了軍事裝備的抗截獲和抗干擾能力，保證了軍事指揮系統的安全和有效性。
  14. As more and more users ' usage patterns evolve to include more and more bandwidth intensive networking applications such as data browsing on the world wide web ( www ), java applications, video conferencing, etc., it emerges an acute need for very high bandwidth transport network, whose capabilities are much beyond those that current high speed ( atm ) networks can provide

    隨著越來越多的用戶應用網路模式的發展，如因特網瀏覽、視頻點播、視頻電話等需要巨大網路帶寬的通信業務的應用，迫切需要一個信息容量大大超過現有的高速網路（如atm ）的網路。而基於波分復用技術的全光網路則充分滿足了現代網路通信帶寬需求，並具有很好的網路性能。
  15. In order to solve this problem, this research adopts the electrical self - regulation circuit in series, on the basis of the unchanged of transfer function of electromagnetism rate transducer, extend frequency bandwidth of the transducer, improving its capability. after the self - regulation, the transducer has high passing feature and inferior lower lever cut - off frequency ( below 1 hz )

    為了解決普通電磁式速度傳感器不能檢測超低頻振動信號的問題，本研究採用了一種串聯式電子補償電路，在保持電磁式速度傳感器的傳遞函數性質（高通）不變的前提下，拓展了傳感器的頻寬，改善了傳感器的性能。
  16. Generation of multi - wavelength signals and ultra - short pulses are of great importance for a wide range of applications such as in wavelength - division - multiplexed ( wdm ) and optical time - division - multiplexed ( otdm ) fiber communication systems, fiber sensing, nonlinear optics, optical instrument testing, and time - resolved spectroscopy

    密集波分復用（ dwdm ）和光時分復用（ otdm ）是實現光纖通信系統升級擴容的有效途徑，而多波長信號及高重復頻率的超短光脈沖的產生則是與其相對應的兩種關鍵技術。
  17. Optical code multiple access ( ocdma ) communication system is a spectral spreading system. all users in the system share all the bandwidth in the same time. because of the using of the almost infinitude bandwidth in the fiber, ocdma system will become more and more important in future ultra - high speed lan and online computer communication system

    光碼分多址（ ocdma ）通信系統，作為一種擴展頻譜系統，用戶同時共享所有帶寬，因為可以充分利用光纖中的巨大帶寬資源，因此在未來超高速局域網和實時計算機通信系統中將扮演重要角色。
  18. After analyzing the traditional methods of generating exciting signals in vibration control system of electrodynamic ( electrohydraulic ) shaker, a new method of adjusting the skewness and kurtosis of exciting signals by second phase modulation is proposed. based on this method, a new algorithm for generating super - gaussian and quasi - random vibration exciting signals with specified psd, skewness and kurtosis is proposed. simulation and experimental results validate the algorithm

    2 .通過分析目前電動（液）振動臺數字式隨機振動控制系統中廣泛採用的激勵信號生成原理，在其基礎上提出了一種通過二次相位調制來控制激勵信號峭度值和偏斜度值的方法，分別得到了頻譜可控的對稱和非對稱分佈超高斯偽隨機激勵信號生成演算法，並進行了數值模擬和試驗驗證，為研究頻譜可控的超高斯真隨機激勵信號生成技術奠定了基礎。
  19. However, the normal electromagnetism rate transducer which has the high inherent frequency of that between 5 - 30hz normally can not get the signal below 1 hz, therefore, it can not be used for inspecting same signal, which confines its applications in engineering project

    然而，由於普通的電磁式速度傳感器，其固有頻率較高，一般都在5 - 30hz之間，很難拾取1hz以下的超低頻絕對振動信號，因此不能直接用來測量上述超低頻振動信號，制約了該類傳感器在工程中的應用。
  20. The research of electromagnetic missile and the slow - decay effect is the advanced task of the electromagnetism, which can be widely used in many fields : ultra - wide radar, ultra - wide secrecy communication, high - power microwave and etc. the detailed analysis of the slow - decay effect of pulse propagation is presented in this paper

    電磁導彈及有關慢衰減電磁波的研究是當前電磁學的前沿課題之一，其應用領域十分廣泛，如超寬頻帶雷達、超寬保密通信和高能微波等。本文對脈沖傳播慢衰減特性進行了詳盡分析。
分享友人
分享到 Line

分享到臉書