波道脈沖 的英文怎麼說

中文拼音 [bōdàomàichōng]
波道脈沖 英文
channel pulse
  • 波 : Ⅰ名詞1 （波浪） wave 2 [物理學] （振動傳播的過程） wave 3 （意外變化） an unexpected turn of even...
  • 道 : Ⅰ名詞（道路） road; way; route; path 2 （水流通過的途徑） channel; course 3 （方向; 方法; 道理） ...
  • 脈 : 脈名詞1. （動脈和靜脈的統稱） arteries and veins2. （脈搏的簡稱） pulse 3. （像血管的組織; 連貫成系統的東西） vein
  1. Based on mono - pulse radar system and the analysis of terrain echoes, a geometrical model of air to ground ranging is constituted. by using the signals received from the sum and difference channels of terrain follow radar, a group of the expressions for terrain echoes are educed and characteristics of these echoes are obtained. according to the characteristics of the echoes, the theory and method of pass zero detection of difference channel and its applications are discussed in detail

    針對一維單脈沖雷達體制，分析了地形目標回波特性；建立了地形跟隨雷達空地測距的幾何關系；利用雷達收發信號，導出了地形跟隨雷達和差接收通道的回波信號表達式，進行了波形模擬，得到了地形跟隨雷達的地面散射產生回波在時域中的特性；根據和差回波特性，闡述了差信號過零點檢測測距的原理和方法及工程實踐中的應用，並給出了真實雷達對外輻射試驗的結果，驗證了文中的模擬。
  2. The main research works of this dissertation are aimed to design of radar waveform and the application of wavelets in ultra - wide radar, including : the design of a new kind of hybrid radar and the research of time side - lobe suppression for pulse compression, the design of receiver r adio front end in data acquisition of ultra - wide band radar, the time delay estimation based on wavelets ( packet ) analysis

    本文主要進行雷達波形設計研究以及研究小波理論在超寬帶雷達中的應用，集中體現在以下幾個方面：一類新的組合雷達波形設計及壓縮脈沖時間旁瓣抑制技術研究、超寬帶雷達多通道數據採集方法中前端射頻接收部分的設計及研製、基於小波（包）方法的時延估計方法。
  3. The conventional sphere model of earth and circle model of orbit are discarded, and the ellipsoid model and the ellipse model are selected for further research, which achieves a method to determine the target position through the antenna pointing direction. and the spaceborne sar system design and simulation software is brought forth. this software accomplishes sar system coefficients design for antenna area, pulse repetition frequency, signal bandwidth, downlink data rate, radar transmitter power and satellite platform yaw steering

    本文從星載雷達的星地幾何關系入手，舍棄傳統星載合成孔徑雷達研究中的球地球模型和圓軌道模型，研究了在地球橢球模型和橢圓軌道模型下由雷達天線確定目標坐標的方法，並在此基礎上研製了星載合成孔徑雷達系統設計與模擬軟體，完成雷達系統天線尺寸、脈沖重復頻率、信號帶寬、雷達信號數據率、雷達發射功率、衛星平臺的偏航牽引等幾個方面的系統參數設計以及雷達多普勒特性、雷達系統模糊、雷達定位及精度的分析，最後完成雷達回波信號的模擬。
  4. The efficient sppc had been performed with 1 - hz - repetition - rate 532nm nanosecond pulses, in which phase conjugate reflectivity as high as 21. 5 % was obtained. when sppc were operated in ce : batio3 with 532nm, 632. 8nm and 790nm cw lasers, the maximum sppc reflectivity of 54. 1 %, 88. 2 % and 80. 5 % were obtained, respectively. unlike the results reported before that four - wave mixing by stimulated photorefractive backscattering ( spb - fwm ) only exists at short wavelengths while four - wave mixing by total internal reflection ( tir - fwm ) only exists at long wavelengths, both of these two mechanisms coexist at all wavelengths from 532nm to 790nm in our experiments

    通過大量的實驗全面研究了ce ： batio _ 3自泵浦位相共軛特性：在低重復頻率（ 1hz ） 、 532nm調q激光泵浦時最高獲得了21 . 5的位相共軛反射率，而此前報道過的建立位相共軛脈沖光最低重復頻率是10hz ；實驗中發現在532nm 790nm波長范圍內，在不同的波長激光泵浦時，同時存在兩種自泵浦位相共軛機制：全內反射?四波混頻（ tir - fwm ）和受激背向散射?四波混頻（ spb - fwm ） ；在連續激光泵浦時，對532nm 、 632 . 8nm和790nm三種波長，最高分別獲得了54 . 1 、 88 . 2和80 . 5的位相共軛反射率；同時還研究了自泵浦位相共軛光的時間穩定性。
  5. In this step, first calculate the impulse press with the different triers, find out the influence of triers to the impulse press. then calculate the impulse press with the different pipeline system, hydraulic accumulator, supercharger and oil viscosity. at last, show the result in the forms of chart, also show the main character of the press curve

    最後根據相應的數學模型進行模擬計算，先計算被試件在不同規格參數的條件下的脈沖壓力響應結果，總結出被試件對脈沖壓力波形的影響；再計算管道系統、蓄能器、增壓器和油液的粘度在不同參數的條件下對脈沖壓力波形的影響，以圖形的形式表示，並給出壓力波形主要特徵的計算結果。
  6. To suppress the clutter, noise and detect target, we adopt several advanced sp methods such as pulse compression, mti, mtd, cfar, amplitude - comparison angle measurement and ambiguity resolution, of which we emphase the algorithms of cfar and ambiguity resolution. two cfar algorithms, cell - averaging cfar ( ca - cfar ) and ordered

    為了抑制雜波、噪聲和檢測目標，採用了脈沖壓縮、動目標顯示、動目標檢測、恆虛警、單脈沖比幅測角和解模糊等較先進的雷達信號處理技術，並採用了多模式分通道處理方式。
  7. They are the property of sum and difference beams, the errors of the elements and channels and different pulse repeating frequency ( prf )

    這些因素包括和、差波束的特性、陣元和通道的誤差、不同的脈沖重復頻率（ prf ） 。
  8. In principle, ultrasonic sensors are suspended over a road, which keep emitting pulse signals periodically to nearby and feed back waves to decide existence of any obstacles, thus to detect the speed, height, length, different sizes ( heavy, medium and small ) of moving vehicles and accumulative flow as well as length of motorcade. optionally, it can be applied to multitude driving lanes simultaneously for traffic data. by integrating and analyzing these measured data, the necessary figures concerning traffic flow may be obtained, which are fundamental basis guiding road buildings

    本課題設計的是一種懸掛式超聲波車流多信息檢測器，通過懸掛于路面上方的超聲波探頭向路面周期性地發射脈沖信號，利用地面回波來判斷遮擋物地存在，可用於檢測行駛中的機動車車速、車高、車長、大中小分型以及累計車流量、車隊長度等信息，並可用於多個車道車流信息的同時檢測，綜合這些測量參數可獲得車流量的必要數據，可為公路建設提供必要的基礎依據。
  9. The paper includes four sections followed here : the first section studies the modeling of signals of pulse doppler radar seeker, and establishes a radar signal simulation model, including radar emitting signal model, receiving signal model, receiving echo signal model, clutter model, noise model, sum channel directional pattern of antenna model, difference channel directional pattern of antenna model, sheltering model, rcs model, glint noise model, etc. the second section studies signal processing of pulse doppler radar seeker, and establishes radar signal processing mathematical model and data processing mathematical model for simulation, including windowing, doppler filtering, envelope demodulation, pdi, cfar, centering, velocity tracking, angle tracking, a - b filtering, etc. the third section studies the modeling of modified proportion guiding, and establishes guiding model, then dynamic simulation results is provided

    論文的主要工作包括四部分：第一部分研究了脈沖多普勒雷達導引頭的信號建模問題，建立了雷達信號模型，主要包括：發射信號模型、接收信號模型、目標回波信號模型、雜波模型、噪聲模型、和差通道天線方向圖模型、遮擋因子模型、接收機噪聲模型、目標雷達截面積統計性模型、目標角閃爍模型等。第二部分研究了脈沖多普勒雷達導引頭的信號處理模式，建立了信號和數據處理模型，主要包括：加窗和多普勒濾波、包絡檢波、檢波后積累、頻域cfar處理、速度定心、速度跟蹤、角跟蹤、 ?濾波等，然後給出了信號處理流程。
  10. This thesis discusses the pulse doppler ( pd ) weather radar signal processing system including digital intermediate frequency ( if ) receiver, especially on the application of if sampling and digital demodulation technique in pd weather radar signal processing system, the influence of amplitude and phase unbalances of in - phase and quadrature channels on weather radar echo spectrum estimation, ground clutters elimination algorithms and a typical engineering realization scheme of pd weather radar signal processing system

    本論文研究的是採用數字中頻接收技術的脈沖多普勒氣象雷達信號處理系統，重點研究了中頻采樣及數字解調技術在脈沖多普勒氣象雷達信號處理系統中的應用、正交雙通道幅相不平衡對氣象回波譜估計的影響、地雜波濾波演算法，以及脈沖多普勒氣象雷達信號處理系統的具體工程實現。
  11. In this paper a multi - passage controlling tactic composed of infinity impulse filter is presented to solve the problem in theory, but actual effect must be verified by experiment in future

    文章嘗試採用由無限脈沖濾波器組成的多通道控制策略，從理論上解決源噪聲信號採集問題，其實質效果還有待於後續實驗驗證。
  12. Author has investigated the air - volume affect the pressure oscillation in piping system from converse viewpoint. when the structure parameters of the air - volume are some certain value, the pressure oscillation in the exit of the piping system is magnified. this idea makes us a new way to design the power source of high pressure water - jet

    研究表明：當設計的空氣室結構參數（空氣室的容積，安裝位置等）取某組數值時，管道出口端的壓力波動幅值遠大於系統輸入壓力波動幅值，從而為設計高壓脈沖水射流的動力源提供了一條新的思路。
  13. In most studies, in order to simplify the physical treatment, the laser beam is usually treated as a plane wave and normal incidence is supposed when its transmission through a fpf is considered

    對于光脈沖通過法布里一拍羅濾波器后的時域和頻域特性己有不少報道，然而我們注意到，在這些研究中激光通常被當作平而波。
  14. Because multi - band wavelet can describe signal more delicately and more compactly than two - band wavelet, and multi - band wavelet can be derived from the infinite iteration of multi - channel filter banks. by means of a detailed discussion for a effective design method of linear phase pr iir filter banks, the author obtain that the method is only fit for two - channel filter banks, but ca n ' t be extended to arbitrary m - channel ( m > 2 ) filter banks

    由於m帶小波比2帶小波分析信號更細致、更緊湊，而m帶小波可由迭代的m通道濾波器組獲得，所以本章分析了一種兩通道線性相位完全重構無限脈沖響應濾波器組的有效設計方法，希望可推廣用於m （ m 2 ）通道。
  15. Although gravitational waves have not yet been detected directly, their influence on a binary pulsar ( two neutron stars orbiting each other ) has been measured accurately, and was found to be in good agreement with original predictions

    盡管引力波至今仍未曾被直接探測到，但它們對脈沖雙星（沿軌道互繞對方運行的兩顆中子星）的影響已經得到精確的測量，而且與最初的預測符合得很好。
  16. Inconsistency between the sum and difference channels in the phased array radar system will affect angle measurement accuracy if the monopulse angle measurement technique is employed. in order to achieve better angle measurement accuracy, they need to be calibrated

    在採用單脈沖技術對目標進行角度測量的相控陣雷達系統中，和差波束接收通道的幅相不一致性對系統的角度測量精度有較大的影響。
  17. The sharp acceleration turns the traveling electron wave into a plane wave, like a nice regular pulse of an electron beam with an extremely short wavelength ? exactly the kind of beam useful for imaging

    急遽的加速會讓行進中的電子波轉變為平面波，就像一道波長極短的電子束所形成的有規律脈沖，完全符合造影所需。
  18. The experience results indicated the reliability of this kind of thermostatic control system. the analysis and compare about modern dielectric loss measuring methods are presented on chapter 3, and the zero - crossing testing phase discrimination method is adapted as the measuring method of this measuring system. furthermore, applied high frequency pulse technique, channel self - correction technique, anti - harmonic technique are used to increase accuracy and reliability of measurement

    本文對現代介質損耗測量技術進行了分析與比較，採用過零鑒相比較法作為介質損耗測量方法，並結合外施高頻脈沖技術、通道自校正技術、抗諧波技術，設計了高精度介質損耗測量電路，有效提高了介質損耗測量的精度，減小了測量誤差。
  19. Simulator presented in this paper provides a direct interface for the test of shortwave communication system, which well represents various features of hf channel such as multi - path delay, rayleigh fading, doppler shift, doppler spread, gaussian noise and impulsive interference, etc. in order to realize the channel simulation for the intermediate frequency signal, we, inspired by the idea of soft - defined radio, bring forward a new design method that the channel simulator consists of several dsp chips

    本文研製的模擬器提供介面直接對短波通信系統進行測試，能夠全面反映短波通道的多徑時延、瑞利衰落、多普勒頻移、多普勒擴展、高斯噪聲和脈沖干擾等特性。為了實現對中頻信號的通道模擬，開發出一個結合軟體無線電思想的由多個數字信號處理晶元構成的短波通道物理模擬器。
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