背景回波 的英文怎麼說

中文拼音 [bēijǐnghuíbō]
背景回波 英文
background return
  • 背 : 背動詞1. （用脊背馱） carry on the back 2. （擔負） bear; shoulder
  • 景 : Ⅰ名詞1 （風景; 景物） view; scenery; scene 2 （情形; 情況） situation; condition 3 （戲劇、電影的...
  • 回 : 回構詞成分。
  • 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...
  • 背景 : （布景; 襯托主體事物的景物; 對人物、事件起作用的歷史條件或現實環境） background; backdrop; setting
  1. The main research advances can be summarized as follows : ( 1 ) study the signal processing ' s performances and methods of homing torpedo system comprehensively, in order to setting up a corresponding mathematical models ; ( 2 ) analyze the ocean channel ' s effects on the work of homing system, then found some models such as target echo signal, noise ( including background noise, target radiating noise, etc ), ocean reverberation. according to them, simulate the array signal ; ( 3 ) the system structure, every function blocks composing are studied and founded thoroughly. then, discuss methods of signal processing in time domain and airspace domain ; ( 4 ) program the simulation software of torpedo ' s homing system according to the simulation models and flow charts, which connected with torpedo ' s control part

    本文所作的主要工作及研究成果主要有以下幾個方面： （ 1 ）對自導工作過程中的信號與信息處理的基本理論與方法進行了較為全面的研究，為建立一個較為完備的自導模擬系統提供了理論基礎； （ 2 ）討論了自導系統工作過程中海洋通道對目標回波信號與目標輻射噪聲信號等的影響，建立回波信號的數學模型、環境場中的噪聲信號模型（包括海洋環境噪聲、目標輻射噪聲與魚雷背景噪聲等）與海洋混響模型，模擬產生了聲自導系統基陣接收到的回波信號與噪聲信號； （ 3 ）深入研究並建立了自導模擬系統的總體框架，給出各個具體功能模塊組成，討論了聲自導系統對信號的時域與空域處理，並結合模擬程序中陣列信號處理模塊，給出固定多通道波束形成的模擬實現過程； （ 4 ）根據系統的模擬模型與已建立的模擬流程圖編制了通用魚雷模擬器自導系統模擬軟體，通過網路與控制系統相連，組成完整的魚雷模擬器。
  2. Using her scientific background, olive integrates brainwave biofeedback training, educational kinesiology, imperative self analysis, sonic neurotechnologies, and other tools into a total system for personal, professional, and organization transformation

    應用她的科學背景，綜合腦波生物回饋訓練、教育肌動學、生命藍圖分析、腦神經科學及其他工具，劉儀整理出一個完整的系統，幫助一般人、專業人士及組織做核心的轉化。
  3. Part three : according to the above study, writer leads some policies, for our choice, on a continuing advance of our real estate industry. this part is composed of chapter four. lt is important how to design or choose the policy on real estate industry for promotion lasting and continuous development of real estate industry. you have to meet this problem when you analyze and study of business cycle fluctuation of real estate industry

    該部分內容由第4章構成，在房地產經濟周期波動運行背景下，特別是對處于經濟轉軌時期的中國而言，如何促進房地產業實現長期穩定增長，是制定和選擇房地產業政策時面臨的一個重要問題，同時也是在分析和研究房地產周期波動時必須正面回答的問題，本部分分析了促進房地產業穩定增長的政策選擇。
  4. This article, through analysis different system radar ’ s superiority and limitation in target identification, proposes to unite the convention air defense radar ’ s echo characteristic and the electronic support sensory system ’ s aircraft - borne radiant characteristic, structure reasonable recognition system. it can satisfie the airplane target identification demand under the different background

    本文通過分析不同體制雷達在目標識別上的優勢和局限性，提出把常規防空雷達回波特徵和電子支援偵察系統得到的機載輻射源特徵聯合起來，構造合理的識別系統的新思路，以此來滿足不同背景下對飛機目標識別的需求。
  5. In the first chapter of the thesis, the background of the radar echo simulator is introduced, including the application, basic theory and technology of the radar echo simulator

    本文首先介紹了雷達回波模擬器課題的背景，包括雷達回波模擬器的作用，基本理論和技術特點。
  6. This project based on the research of pd radar simulator, give the mathematic model of the ground clutter and target, generate the data of them. then the data has been translated to the memory of the simulator by a pci card

    本課題以某機載相控陣雷達模擬器的研製為背景，對雷達雜波和目標回波進行數學建模，產生相應的目標數據和雜波數據，並通過計算機pci總線，將生成的數據文件加載到雷達模擬器的存儲器中。
  7. The paper first reviews the research background and actuality of the filter " s design in china and other country, introduces the meaning of the project and the work of the paper, narrates the theory of the switched - capacitor network and the basic switch building blocks, analyses the related factors of the design of sc filter. such as the selection of the architecture, the trade off of the opamp " s gain, bandwidth, phase margin, slew rate and setting time, the effect of the switch " s on resistor, how to reduce the charge injection and the clock feed - through, the power consumption and the selection of the sampling frequency and so on

    本文首先回顧了濾波器設計的國內外研究背景和現狀，介紹了本課題提出的意義以及本文的主要工作，論述了開關電容網路原理和基本開關模塊，分析了開關電容濾波器設計的相關因素：電路結構的選擇，對運算放大器設計中高增益、寬帶寬、相位裕度、轉換斜率和建立時間等的折中考慮，開關的打開電阻對電路的影響，開關電容電路中怎樣減少電荷注入和時鐘饋通，以及整個電路的功耗問題和采樣頻率的選擇等。
  8. In order to better detect the image edge information, firstly, non ? linear median filter technology of characteristic direction was applied to filter out the gauss noise ; secondly, ( 3, 1 ) biorthogonal spline wavelet was used as the primitive wavelet filter, adopting lifting scheme to build the most superior biorthogonal wavelet filter, and applying the superior biorthogonal wavelet to the multiresolution wavelet edge detection ; at the same time, floating threshold was defined and applied to the image edge detection, and the image edge position was located accurately

    在激光探測系統中，微弱的回波圖像淹沒在強背景噪聲中，為更好地檢測這類含噪圖像的邊緣信息，首先應用特徵方向非線性中值濾波技術，濾去高斯噪聲；其次，選擇（ 3 ， 1 ）雙正交樣條小波作為原始小波濾波器，採用提升方案構造最優雙正交小波濾波器，應用構造的雙正交小波進行多尺度小波邊緣檢測；同時，通過定義浮動閾值，並應用於圖像邊緣檢測，較準確地定位了邊緣位置。
  9. In order to better detect the image edge information, firstly, non - linear median filter technology of characteristic direction was applied to filter out the gauss noise ; secondly, ( 3, 1 ) biorthogonal spline wavelet was used as the primitive wavelet filter, adopting lifting scheme to build the most superior biorthogonal wavelet filters and applying the superior biorthogonal wavelet to the multiresolution wavelet edge detection ; at the same time, floating threshold was defined and applied to the image edge detection, and the image edge position was located accurately

    在激光探測系統中，微弱的回波圖像淹沒在強背景噪聲中，為更好地檢測這類含噪圖像的邊緣信息，首先應用特徵方向非線性中值濾波技術，濾去高斯噪聲；其次，選擇（ 3 ， 1 ）雙正交樣條小波作為原始小波濾波器，採用提升方案構造最優雙正交小波濾波器，應用構造的雙正交小波進行多尺度小波邊緣檢測；同時，通過定義浮動閾值，並應用於圖像邊緣檢測，較準確地定位了邊緣位置。
  10. Based on the research of x band ground based radar ( gbr ) simulation system, this dissertation mainly discusses the design and application of its sub - systems : return generation ( rg ) and signal processing ( sp )

    本文以科研合同單位提出的x波段地基雷達（ gbr ）軟體模擬系統的研究課題為背景，對其中的回波生成和信號處理模擬子系統的設計和實現進行了較為深入的研究。
  11. Higher capabilities were put forward for detection, identification and anti - interference of torpedo in future naval battle. compared with the narrow - band processing, wide - band processing is a new direction for underwater signal processing for its advantages including abundant information of wide - band echo and little correlation of reverberation

    未來海戰對魚雷在探測目標、識別目標和反對抗能力方面提出了更高的要求，而寬頻帶回波信號具有攜帶目標信息量大，混響背景相關性弱，利於檢測、識別目標等優點，因此自導系統發展的方向是寬頻帶自導。
  12. Studied the cluster and background reduction algorithm and, proposed an enhanced adaptive step average method based on the amplitude of a - scan signal ; 2. improved the gpr data acquisition and processing software, some utilities have been added such as position wheel control program, data format translation etc. ; 3. implemented 3d targets imaging using mixed programming of matlab and visual c + + ; 4

    本文的主要工作如下: 1 .研究了探地雷達回波信號雜波及背景去除演算法，改進了一種基於a - scan信號強度的自適應滑動平均法; 2 .改進並完善了探地雷達數據採集處理軟體，加入了定位輪控制數據採集、數據格式轉換、目標距離測定等程序; 3 .研究了探地雷達目標成像演算法，利用動態鏈接庫技術實現了在脫離matlab環境下在visualc + +編寫的程序中調用matlab程序對目標進行三維成像的功能; 4 .參加外場實驗及項目驗收。
  13. There are two ways to enhance the radar ' s detection performance : ( 1 ) for certain signal to noise ratio, choose a optimum detection threshold, whose false decisions producing minimum cost under the preset cost rules ; ( 2 ) basically reduce the false decision probability by increasing echo ' s snr

    雷達在噪聲背景中檢測信號是一個概率問題，提高雷達的檢測能力可歸結為如下兩個途徑： （ 1 ）在信噪比一定的情況下，選擇一最佳門限，使其在一定風險準則下錯誤判決產生的「代價」最小。 （ 2 ）提高回波信號的信噪比，從根本上減小錯誤判決的概率。
  14. ( 4 ) after factual characteristics of targets and clutter have been studied, an approach of radar signal detection based on factual has been given and analyzed deeply, the influence caused by different window length, signal to clutter ratio ( scr ) and clutter background has been analyzed, then the monte - carlo simulation method has been used to analyze the detection performances

    （ 4 ）研究了目標和雜波的分形特性，深入研究了基於分形的雷達信號檢測方法，分析了不同滑窗長度、不同信雜比和雜波背景變化情況對回波分形維數的影響，採用蒙特卡羅模擬分析該檢測器的性能。
  15. Although he returned to noord brabant and his family early in 1881, his first recognized works were set in borinage and reflected the rural culture in which he was living and his belief in order and symmetry in both society and art

    雖然在1881年初，他回到北布拉薩市班省家人身邊，他最初被認可的作品卻是以波里納日為背景，所反映的是他長期生活在其中的鄉村文化以及對社會與藝術秩序和對稱的理念。
  16. The results show that ( 1 ) the " prediction & cancellation " method can successfully smooth the reverberation and sharpen edges of the echo, so may detect echoes which power are great than the reverberation background by odb in one channel, ( 2 ) the scaled probabilities method can effectually separate a echo which power is great than the background by 6db, while the reverberation is cancelled dr astically

    果。計算結果表明， 「預測一抵消」演算法對混響有平滑作用，對回波則有突出信號邊緣的作用，單通道情況下的最小可檢測信號干擾背景功率比約為odb 。概率凈化演算法在信號干擾背景功率比大於6db的情況下能有效分離回波、抑制混響。
  17. The main contents are as follows : 1. review the theory and application of sequential monte carlo method, and discusse the filtering error counteraction problem by a nonlinear and non - gaussian filtering example. 2

    主要內容包括: 1 .充分回顧了貫序蒙特卡羅方法的主要理論背景與應用現狀，通過對一個非線性非高斯濾波算例的研究，討論了濾波誤差抵消問題。
  18. Doppler radar is wide used, which utilizes the doppler shift between the target and radar to get the target information and process it. doppler radar has high performance on differentiating velocity, and it can efficiently solve the interference of the ground clutter to get the target echo from bad environment

    多普勒雷達是一種廣泛採用的全相參體制的雷達，它利用目標與雷達之間相對運動而產生的多普勒效應進行目標信息提取和處理，具有較高的速度解析度，可以有效地抑制雜波，能在較強的雜波背景中分辨出動目標回波。
  19. This thesis studies sar / isar motion compensation which based on the received signals

    本文在此背景下主要研究了sar和isar中基於回波信號的運動補償技術。
  20. To solve the weak target detection under the clutter background, combined with dynamic chaotic model, the chaotic property of the laser echo signal is discussed and a novel algorithm is presented based on chaotic signal detection using neural network predictor

    摘要為了解決雜波背景下的激光微弱目標檢測的問題，結合混沌動態建模思想，討論了激光回波的混沌特性，提出激光信號非線性混沌序列的神經網路建模、預測及信號檢測演算法。
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