累積脈沖 的英文怎麼說

中文拼音 [lěijīmàichōng]
累積脈沖 英文
giant pulse
  • 累 : 累Ⅰ形容詞（疲勞） tired; fatigued; weary Ⅱ動詞1. （使疲勞; 使勞累） tire out; wear out 2. （操勞） work hard; toil
  • 積 : Ⅰ動詞（積累） amass; store up; accumulate Ⅱ形容詞（長時間積累下來的） long standing; long pending...
  • 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
  • 累積 : accumulate累積服刑 [法] accumulative sentence; 累積股本 cumulative capital stock; 累積股息 cumula...
  1. Second, this paper analyzes the time - frequency distribution of the clutter from airborne pulse doppler radar ( pdr ). the side - lobe clutter, which is the main factor to influence the pdr, is analyzed and calculated. based on the simulation of typical geometry of the land, we analyze and discuss the side - lobe clutter and concluded that the dft of can be considered as the phase of the coho

    並且根據各種典型地貌的近似模擬，從統計特性上和頻率域上對脈沖多卜勒雷達的旁瓣雜波進行了分析討淪，還得出脈沖多卜勒雷達的dft可以近似地看作相參積累，並在程序的編制中利用了這一個結論。
  2. This paper deduces the optimum threshold expression under certain cost rule and relationship between the number of pulse accumulation and the increased ratio of echo ' s snr

    本文推導了最佳門限電平的表達式和脈沖積累對回波信號信噪比的改善能力。
  3. Finally, a kind of noncoherent - integration monopulse radar angle measuring algorithm based on square amplitude weighting method is developed, the computer simulation proves that this algorithm is prior to the common noncoherent - integration angle measuring method under all kinds of snr conditions

    最後提出一種基於幅度平方加權的單脈沖雷達非相參積累測角演算法，模擬表明在各種信噪比條件下這種方法的測角精度都優于常規的非相參積累測角方法。
  4. 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。
  5. Firstly, the paper, combining the characteristic of synchronous pulse bursts and inhibition with the modified pcnn model, presents a way of finding the foveation points in the images adaptively and effectively, and simulates the human vision system. secondly, pcnn is extended to pcnns, based on the properties of information couple and transmission, an algorithm that is used to fuse images of the same target got by several sensors to an image is presented to simulate the human vision system. thirdly, combining the properties of synchronous pulse bursts, capture, and transmission and competition of waves, the paper presents two ways of classification, one is an algorithm based on the properties of neuron to capture and inhibit to classify the data taking on any complex unlinear distribution robustly, the other is based on the restricted distance and modified of the former to remove the influence of inferior samples in classification ; fin ally, based on the accumulative difference pictures, and the forming and transmission of pcnn wave, selecting and controlling the direction of autowave by connecting the neighbouring neurons selectively, the paper presents a way to simulate the tracks of moving object and detect the moving direction

    首先結合pcnn的同步脈沖發放和側抑制特性，提出了基於改進型pcnn的圖像凹點檢測演算法，該演算法是一種自適應而有效的圖像凹點檢測方法，並且較好地模擬了人類視覺系統；然後，結合信息傳遞和信息耦合特性，將pcnn擴展成pcnns （ pcnn網路群） ，提出了一種基於pcnns的圖像融合演算法，能夠將多個傳感器獲取的同一目標的圖像信息融合到一幅圖像中，有效模擬了人類視覺系統；另外，結合pcnn的同步脈沖發放特性、捕獲特性和波的傳播競爭特性，開拓地將pcnn用於模式分類中，提出了基於耦合神經元點火捕獲抑制特性的分類方法和改進的約束距離下的pcnn分類方法，前者可實現對樣本空間中任意復雜分佈訓練樣本的穩健非線性分類，而後者能夠消除訓練樣本中刺點對分類的影響；最後，結合累積差分圖像思想、 pcnn波的形成與傳播特性，通過各神經元之間連接取向來選擇與控制自動波的流向，將pcnn用於運動視覺分析中的運動軌跡模擬及運動方向檢測。
  6. Aiming at the restrictions of fft methods, this paper put forward a transform naming changing scale discrete chirp - fourier transform and applied it to detecting accelaration target using missle - borne high - prf pulsed doppler radar, at last this paper put forward a new sequential detection method. in the third part of this paper, aiming at the different characteristic of the extended target spectrum, this paper discussed the detecting and precised measuring the extended spectrum of the target

    針對傳統fft對加速目標進行積累檢測時的局限性，提出了一種變尺度離散chirp ? fourier變換並將其應用於彈載高重頻脈沖多普勒體制雷達對加速運動目標的檢測背景中，提出了一種對加速運動目標的序貫檢測演算法。
  7. The second part brings forward a new ar - model - based arm detection method based on features of arm and characteristics of velocity and acceleration of the radar echoes. by establishing two - order ar models, this new detection method computes the poles of models representing different targets, thus estimates the acceleration of the targets so as to determine the nature of the targets. furthermore, this method can not only be applied when the arm is being tracked by radar, but also be put into use in radar ’ s seeking and scanning times

    第二部分則是根據反輻射導彈（ arm ）的特點及其雷達回波信號中速度、加速度等特徵，提出了一種新的基於ar模型的arm檢測演算法，該方法通過建立二階ar模型、估計代表不同目標的模型極點，並由此估算目標加速度來判斷目標性質，該方法不僅可以在雷達已跟蹤上arm后採用，而且適用於雷達搜索掃描時使用，模擬結果表明該方法具有解析度高，對雷達脈沖重復頻率（ pulserepetitionfrequency ， prf ）及積累脈沖數要求不高的特點，在低的prf及少的積累脈沖下，利用該方法仍可有效地識別檢測arm 。
  8. Some valuable conclusions are summarized by theoretical analysis and simulation experiments : from the side of signal processing, pulse jamming can be deleted by the method of time - domain sliding window accumulation and can be restored by interpolative prediction. ; gauss white nose can be attenuated while jamming disperse point - target by the method of time - frequency analysis in time - frequency domain. ; radio frequency noise jamming can be deleted by the method of average range frequency spectrum and notching in frequency domain

    通過大量的理論分析和模擬實驗，得到了一批具有一定價值的結論：從信號處理的角度出發，對于脈沖式干擾，能夠運用時域滑動窗口積累的方法去掉，並且通過預測插值得到較好的恢復；對于高斯白噪聲干擾，在時頻變換域內應用時頻分析方法可減小其對分散點目標的干擾；對于射頻噪聲，通過平均距離頻頻法和頻域陷波的方法可以去掉；從改變合成孔徑雷達系統角度出發，類似雙基地雷達能夠避免各種干擾，對發射信號進行調幅，調相以及改變調頻斜率都是較好的抗干擾方法。
  9. The results of calculation and experiments shows that adopting the sf _ ( 6 ) - n _ ( 2 ) mixtures as dielectric, smoothing the field distribution in gaps and decreasing the capacity of self - breakdown gaps would be effective methods to decrease the delay and jitter

    積累了大量實驗數據，得到了有關激光觸發多級多通道開關和多通道場畸變開關的一些規律性的認識，對于脈沖功率開關設計具有重要參考價值。
  10. Secondly, the common noncoherent - integration monopulse radar angle - measuring method is analysized in the weighting viewpoint, it is equal to the linear weighting on the result of single pulse angle measuring using signal amplitude of sum channel

    採用加權的觀點分析了常規的單脈沖雷達非相參積累測角方法，指出其實質相當于對單次脈沖測角的結果用和通道信號幅度進行線性加權。
  11. Stepper motor is a kind of electromechanical component that is driven in step angle or line displacement by electric pulse signal. because of having the advantage of easy open - loop control and no accumulating error, stepper motor is being applied widely in many fields

    步進電機是一種將電脈沖信號轉換成相應的角位移或線位移的機電元件，具有易於開環控制、無積累誤差等優點，在眾多領域獲得了廣泛的應用。
  12. ( 3 ) the mono - pulse range cell integration detection ( mprid ) method has been improved to adapt to the unrayleigh clutter background, and then the monte - carlo simulation method has been used to analyze the detection performances compared with the dtd

    （ 3 ）改進了噪聲背景下的單脈沖徑向積累恆虛警檢測方法，使之適應于非瑞利雜波背景，並採用蒙特卡羅模擬比較分析了該方法與雙門限檢測方法的性能。
  13. Then on one hand, author makes researches of anti - jamming against pulse jamming 、 gauss white noise jamming and radio frequency noise jamming from the side of signal processing. author exercises much signal processing knowledge of time - domain sliding window accumulation 、 wavelet analysis 、 time - frequency analysis and linear prediction and carries out many simulation experiments. on the other hand, author proposes the anti - jamming methods of using a sar similar to double - base radar and modulating the amplitude 、 the phase of emission signal and changing the frequency modulation slope from the side of changing sar system model

    作者首先提出了合成孔徑雷達抗干擾的定義、分類以及評價抗干擾方法好壞的主客觀標準；然後，一方面從信號處理的角度出發對脈沖式干擾、高斯白噪聲干擾以及射頻噪聲干擾進行了抗干擾研究，其中運用了時域滑動窗口積累，小波分析，時頻分析以及線性預測等信號處理知識，做了大量的模擬實驗；另一方面，本文基於改變合成孔徑雷達系統模式提出了利用類似雙基地雷達來抗干擾，以及對發射信號進行調幅、調相以及改變調頻斜率來抗干擾，同樣做了相應的模擬實驗。
  14. In this paper applications of wavelet packet analysis, higher order cumulant method and some image processing method in the processing of gpr data acquired from subsurface target backscattering are presented, which includes the following contents : methods to denoise and suppress background clutter for target detection ; to improve the time resolution for target position ; target recognition

    本文討論了小波包分析、高階累積量分析及圖象處理方法在沖擊脈沖探地雷達淺層反射信號處理中的若干應用，包括對目標去噪、確定目標時間位置及進行目標識別方法的研究。
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